Oversize Return To Comminuting Zone Patents (Class 241/80)
  • Publication number: 20150122920
    Abstract: A crushing device includes a horizontal shaft impact crusher having an impeller rotating around a horizontal shaft and at least one curtain against which material may be crushed. The crushing device further includes a first feeding device for feeding a first type of material to be crushed to a crushing chamber of the horizontal shaft impact crusher. A second feeding device feeds a second type of material, having a smaller average particle size than the first type of material, to the crushing chamber simultaneously with the first feeding device feeding the first type of material to the crushing chamber. A mixing arrangement for at least partially mixes the first and the second types of materials with each other before bringing them into contact with the impeller.
    Type: Application
    Filed: May 24, 2013
    Publication date: May 7, 2015
    Inventors: Rowan Dallimore, Andreas Forsberg, Knut Kjaerran
  • Publication number: 20150076263
    Abstract: Provided is a vertical-type mill whereby abrasion of a hopper and accumulation of coarse particles in the hopper can both be prevented. A vertical-type mill provided with a milling mechanism for milling a material to be milled and obtaining solid particles by meshing of a milling roller or milling ball and a milling table, a classification mechanism having a classifier for classifying milled solid particles and a hopper (11) for collecting coarse particles that are classified by the classifier and dropped downward and leading the coarse particles toward the milling mechanism, a raw material feeding pipe (1) for charging the material to be milled into the milling table, and housings (43a, b), wherein the raw material feeding pipe is provided in the hopper so that the relationship 0.15?L?/L?0.
    Type: Application
    Filed: March 21, 2013
    Publication date: March 19, 2015
    Inventors: Takashi Aizawa, Takehiro Aoyama, Fumiya Hamanaka
  • Publication number: 20140367503
    Abstract: A mobile apparatus for comminuting lumpy material, especially rock, includes a chassis, a crusher arranged on the chassis, a feed device, provided on the chassis, for the lumpy material to be fed to the crusher and comminuted, a removal conveying device having a sieve device for the material comminuted by the crusher and a return conveying device for returning material held back by the sieve device to the feed device. In order to ensure heap separation of comminuted material of different grain sizes despite high crushing throughput, one conveying section of the return conveying device including at least two conveying sections is secured to the device by at least one rotational joint such that it can be turned away from the feed device.
    Type: Application
    Filed: January 4, 2013
    Publication date: December 18, 2014
    Applicant: KORMANN ROCKSTER RECYCLER GMBH
    Inventor: Wolfgang Kormann
  • Publication number: 20140203121
    Abstract: A classifier including a housing, a body, a vane assembly, and an outlet. The housing extends along a longitudinal axis between opposing first and second ends, and includes a lower portion provided at the first end and including an inlet, an upper portion provided at the second end and including a reclaim outlet, and an intermediate portion provided between the upper and lower portions. The body is disposed within the housing that defines a chamber therebetween. The vane assembly includes a plurality of blades and is provided between an outer surface of the body and an inner surface of the intermediate portion dividing the chamber into first and second chambers. The outlet is provided at the second end and is fluidly connected to the second chamber to allow fine particles separated from coarse particles to flow through the outlet. The reclaim outlet is fluidly connected with the second chamber and a pulverizer to allow coarse particles separated from the fluid flow to be directed back to the pulverizer.
    Type: Application
    Filed: January 24, 2014
    Publication date: July 24, 2014
    Applicant: LP Amina LLC
    Inventors: William Latta, Changchun Wu, Matthew Targett
  • Patent number: 8672248
    Abstract: An asphalt roofing material recycling system and method is used to recycle new and used asphalt materials. The asphalt material is broken up and separated. Dry ice may be added to the recycler and/or a jacket coolant used to cool the recycling vessel. The recycle vessel includes a number of high speed choppers having a blunt end as well as a horizontal mixer element with paddles. The recycled asphalt material is provided to a screener that may feature a plurality of sloping levels, each level including a tray below a screen and balls located within the tray that bounce due to vibration to prevent clogging of the screener. A second processing trip involving gravity feeding the material to be further recycled into a cutter with knife edges to further break down the size of the asphalt material is used for large particles that do not pass through the screener.
    Type: Grant
    Filed: June 13, 2012
    Date of Patent: March 18, 2014
    Assignee: Recycled Asphalt Shingle Technology, LLC
    Inventors: Robert Zickell, Thomas J. Zickell
  • Patent number: 8535485
    Abstract: A system for forming an oil sand slurry from mined oil sand is provided, comprising a slurry preparation tower having an intake opening through which oil sand enters the slurry preparation tower, a first sizer device to comminute the oil sand passing through it, a second sizer device to further comminute the oil sand, and a pump box for receiving oil sand that has passed through the second sizer and feeding it to a pump; at least one conveyor, having a discharge end, for transporting mined oil sand to the slurry preparation tower; a metal detector for detecting a piece of metal in the mined oil sand and transmitting a signal; and a metal rejection device operative to, in response to the signal from the metal detector, reject a portion of oil sand containing the piece of metal before the portion of oil sand enters the slurry preparation tower.
    Type: Grant
    Filed: November 9, 2009
    Date of Patent: September 17, 2013
    Assignee: Syncrude Canada Ltd.
    Inventors: Ron Cleminson, David Fudge, Michael Carniato
  • Patent number: 8210458
    Abstract: A recirculating grinding mill, including at least two rolling presses for comminuting the material to be ground, at least two first classifiers for classifying a coarse-grain fraction, at least one second classifier for classifying a fine-grain fraction and a medium-grain fraction from the fractions classified in the at least two first classifiers. The feedstock is fed into the recirculating grinding mill passing the at least two rolling presses and the at least two first classifiers and then the at least one second classifier and the medium-grain fraction and the coarse fraction of the at least two first classifiers being fed once again to the rolling presses, and the at least two first classifiers being arranged underneath the at least two rolling presses. The rolling presses are placed between at least two risers for transporting the circulating material being ground.
    Type: Grant
    Filed: April 8, 2009
    Date of Patent: July 3, 2012
    Assignee: KHD Humboldt Wedag GmbH
    Inventors: Siegfried Strasser, Stefan Seemann
  • Patent number: 8146841
    Abstract: Clean glass particles are produced from post-consumer mixed glass and like waste streams by a series of pulverizing, size- and material-based separation, ozonation, drying, sizing, and paper fluff removal steps.
    Type: Grant
    Filed: July 26, 2010
    Date of Patent: April 3, 2012
    Assignee: Glass Processing Solutions, LLC
    Inventor: Cynthia Andela
  • Patent number: 8113450
    Abstract: In a pulverization/dispersion processing system using a medium agitating type wet pulverization/dispersion machine, a system capable of judging the progress of pulverization/dispersion processing successively and objectively during the pulverization/dispersion processing is provided. A pulverization/dispersion processing system 10 including a medium agitating type wet pulverization/dispersion machine 20, a holding tank 40 of a material to be processed, a circulating pump 30, and circulating lines 50 connecting these components to each other is equipped with a particle size distribution measuring instrument and/or a zeta potential measuring instrument 60 in one of the circulating lines 50. These measuring instruments 60 perform measurement by means of an ultrasonic wave, and can use an ultrasonic attenuation method or an electronkinetic sonic amplitude method.
    Type: Grant
    Filed: April 9, 2008
    Date of Patent: February 14, 2012
    Assignee: Nippon Coke & Engineering Co., Ltd.
    Inventors: Satoshi Shiina, Osamu Ishikawa, Hiroaki Kezuka
  • Patent number: 8079538
    Abstract: An apparatus for making a cementitious composition may comprise a grinding mill for producing a cementitious composition from clinker and gypsum and classifiers for separating the cementitious composition into various portions. A primary portion of the cementitious composition has a particle size distribution such that substantially all of its particles are of a size of about 10 microns or smaller. A secondary portion and a remainder portion of the cementitious composition are combinable to form a resultant cementitious composition selected from Type I portland cement and Type III portland cement.
    Type: Grant
    Filed: November 12, 2010
    Date of Patent: December 20, 2011
    Assignee: Capitol Aggregates, Ltd.
    Inventors: Louis U. Spellman, Jose Garcia
  • Patent number: 8066211
    Abstract: A closed-circuit grinding plant for grinding coarse material into a fine material, in particular for generating cement raw meal and/or cement from cement clinker, the plant having at least two roller presses disposed about a central riser shaft which pneumatically transports the fine material or pulverizing the coarse material, at least two sifters for separating the fine material generated during the pulverization from still existing coarse material, and at least two fine material settling devices for settling the fine material from the sifting air of the sifters.
    Type: Grant
    Filed: November 19, 2008
    Date of Patent: November 29, 2011
    Assignee: KHD Humboldt Wedag GmbH
    Inventors: Alexander Hagedorn, Meinhard Frangenberg
  • Patent number: 8020798
    Abstract: A pulverizer simplified in structure for easy maintenance and suppressed in cost. The pulverizer has a hopper (2) provided on one side thereof, a product discharge hole (4) provided on the other side thereof, and a raw material crushing chamber (3) for crushing raw material that is fed from the hopper (2) and discharging the crushed material from the product discharge hole (4) . The pulverizer further has at least one thin plate-like rotor (8) disposed on the upstream side inside the raw material crushing chamber (3), a hollow circular cylindrical space (S1) in which the rotor is placed, a classifying space (C) disposed on the downstream side of the hollow circular cylindrical space (S1) and formed in a hollow circular cylindrical shape having an inner diameter smaller than the hollow cylindrical space (S1), and a product discharge hole (4) which is coaxially disposed on the downstream side of the classifying space (C) having an inner diameter smaller than the classifying space (C).
    Type: Grant
    Filed: February 1, 2008
    Date of Patent: September 20, 2011
    Assignee: Micropowtec Corporation
    Inventor: Takashi Hasegawa
  • Patent number: 7971815
    Abstract: A milling station and a method for grinding milling material using at least one coarse grinding circuit and at least one fine grinding circuit. The coarse grinding circuit includes a classifier and a material bed roller mill. The fine grinding circuit includes a tube mill with at least two grinding chambers, a central outlet, and a divider. In some instances, at least some of the milling material from the coarse grinding circuit is subdivided in the divider and delivered to the at least two grinding chambers of the fine grinding circuit while some of the milling material is jointly discharged from the at least two grinding chambers through the central outlet.
    Type: Grant
    Filed: February 14, 2006
    Date of Patent: July 5, 2011
    Assignee: Polysius AG
    Inventors: Ludger Schulte, Franz-Josef Zurhove, Donald A. Longhurst
  • Patent number: 7967226
    Abstract: A drying mill for powdered or fine-grained material, in particular also suitable for calcining gypsum, employs a housing, in which a feed device for fuel gas, opening into a lower region, a comminuting device and a material inlet, charging the material onto the comminuting device from above, are provided one above the other, a material outlet leading to the outside from an upper region of a working chamber and a return leading downwards to the comminuting device, the comminuting device being a centrifugal disc which rotates in a horizontal plane and interacts with an impact casing arranged on the inside of the housing. A nozzle ring surrounding the centrifugal disc from below is provided for feeding fuel gas into the working chamber. As a result, the calcining process in particular is assisted in an efficient way by utilizing the thermal energy of the hot gas fed into the working chamber by means of the nozzle ring and the dwell time in the working chamber. A corresponding comminuting method is provided.
    Type: Grant
    Filed: July 25, 2006
    Date of Patent: June 28, 2011
    Assignee: Claudius Peters Technologies GmbH
    Inventor: Volker Göcke
  • Publication number: 20100294170
    Abstract: A method for producing multi-component cements with the following procedural steps: one component B of the multi-component cement is ground in a grinding installation MB; Portland cement is ground as component A in a cement grinding installation MA; the mechanically discharged grinding stock of the grinding installation MB is supplied to the inlet of a dynamic classifier with adjusted separation cut; the Portland cement is also supplied to the inlet of the dynamic classifier of the grinding installation MB, and the oversized material of the dynamic classifier of the grinding installation MB is recycled to the inlet of the grinding installation MB, whereas the fine product of the dynamic classifier forms the multi-component cement.
    Type: Application
    Filed: September 23, 2008
    Publication date: November 25, 2010
    Applicant: HOLCIM TECHNOLOGY LTD
    Inventors: Paul Clemens, Dietmar Espig
  • Patent number: 7823810
    Abstract: A method and a device for producing and/or conditioning powdered material. The aim of the invention is to provide a method and an associated device which are used for producing and/or conditioning powdered material in a spouted bed comprising inert particles and in which a dry, fine powder having a very small particle diameter is produced at a low cost and at adequately large quantities in a continuous operation. This aim is achieved by a method in which the material is treated in several stages in a spouted bed comprising inert particles. In the method, the powdered material that is preprocessed in a first spouted bed and is separated from the larger material particles in an integrated dust collector is fed to a superimposed second spouted bed as a material-gas flow along with the gas flow discharged from the first spouted bed in order to be further reduced in size and be conditioned.
    Type: Grant
    Filed: September 1, 2007
    Date of Patent: November 2, 2010
    Assignee: Glatt Ingenieurtechnik GmbH
    Inventors: Karlheinz Rumpler, Michael Jacob, Frank Ohlendorf, Bernhard Wand, Reinhard Bober
  • Patent number: 7775465
    Abstract: A method and apparatus for grinding iron ore or iron ore concentrate is able to grind iron ore or iron ore concentrate economically. In the method and apparatus disclosed, the material is ground in circulation in a material bed roll mill, one fraction of the iron ore or iron ore concentrate ground in the material bed roll mill is recirculated to the material bed roll mill and the other fraction of the iron ore or iron ore concentrate is classified into oversize material and fines, and the oversize material is returned to the material bed roll mill.
    Type: Grant
    Filed: August 10, 2004
    Date of Patent: August 17, 2010
    Assignee: Polysius AG
    Inventors: Egbert Burchardt, Franz-Josef Zurhove
  • Patent number: 7775466
    Abstract: A clean dry glass powder useful as a substitute for Portland cement in concrete, in paints, and for other known uses for glass powder produced conventionally can be produced from unsorted post-consumer waste glass, including a substantial fraction of non-glass items, by employing glass pulverizing equipment to reduce waste glass to small fragments, allowing removal of trash, employing a multistep washing process to clean the glass fragments, in the preferred embodiment using aggregate cleaning equipment, drying the fragments, preferably using fluidized bed techniques, and grinding the glass to a desired particle size, preferably using a ball mill, in combination with an air classification step to produce a glass powder of uniform particle size.
    Type: Grant
    Filed: August 8, 2008
    Date of Patent: August 17, 2010
    Assignee: Empire Resource Recovery LLC
    Inventors: Louis P. Grasso, Jr., Louis P. Grasso, Sr., Patrick S. Grasso, Sr., Elliot Kracko, Cynthia A. Andela, Ralph J. Acampora
  • Publication number: 20100133369
    Abstract: A grain size and/or pulverulent-matter drying apparatus for the treatment of suspended mineral particles, at least 90% in weight of which have a size less than 60 mm, primarily includes a substantially vertical gas pipe with an ascending flow provided with a gas inlet, a lower opening and an upper opening between which a supply opening is also provided for insertion of matter. A portion of the matter, or so-called “fines”, can escape with the gas through the upper opening due to the bearing capacity of the ascending flow, while another coarser portion of the matter is not carried away by the gas and falls into the lower opening. The apparatus also has a device for creating turbulence, which favors the separation of the different grain sizes and the suspension of matter, provided at the internal wall of the pipe and located between the lower opening and the supply opening.
    Type: Application
    Filed: November 20, 2007
    Publication date: June 3, 2010
    Applicant: FIVES FCB, Societe Anonyme
    Inventors: Sébastien Devroe, Alain Cordonnier, Pascal Marechal
  • Publication number: 20100108791
    Abstract: A pulverizer simplified in structure for easy maintenance and suppressed in cost. The pulverizer has a hopper (2) provided on one side thereof, a product discharge hole (4) provided on the other side thereof, and a raw material crushing chamber (3) for crushing raw material that is fed from the hopper (2) and discharging the crushed material from the product discharge hole (4) . The pulverizer further has at least one thin plate-like rotor (8) disposed on the upstream side inside the raw material crushing chamber (3), a hollow circular cylindrical space (S1) in which the rotor is placed, a classifying space (C) disposed on the downstream side of the hollow circular cylindrical space (S1) and formed in a hollow circular cylindrical shape having an inner diameter smaller than the hollow cylindrical space (S1), and a product discharge hole (4) which is coaxially disposed on the downstream side of the classifying space (C) having an inner diameter smaller than the classifying space (C).
    Type: Application
    Filed: February 1, 2008
    Publication date: May 6, 2010
    Applicant: MICROPOWTEC CORPORATION
    Inventor: Takashi Hasegawa
  • Publication number: 20100108788
    Abstract: A method of estimating the hydration reactivity of coal ash with high precision and determining the amount of milling water for obtaining a milling product in funicular form at the stage of milling; and a molding method being free from the problem of adhesion to a pressurization board at the stage of molding after the milling. When any collected coal ash exhibits a corrected basicity ((CaO+Fe2O3+MgO)/SiO2 (weight ratio)) of 0.1 or higher and a reactivity index (corrected basicity/(R2O/Al2O3) (weight ratio)) of 10 or higher, the coal ash as a raw ash is transferred to raw ash silo (2). Otherwise, the coal ash is transferred to waste ash silo (3). The raw ash within the raw ash silo (2) is poured in mill (8), and lime and gypsum are added and further milling water is charged thereto and milled.
    Type: Application
    Filed: October 25, 2007
    Publication date: May 6, 2010
    Applicant: Kawasaki Plant Systems Kabushiki Kaisha
    Inventors: Noboru Takikawa, Yasunori Shibata, Atsushi Kondo, Tamaki Sakurai, Yoshiteru Kato, Kozo Kuga, Tomokazu Tengan, Tatsuya Ishihara, Atsushi Chinen, Yoshimichi Daijyo, Noboru Yasuda, Masahiko Doi
  • Patent number: 7690591
    Abstract: The invention relates to a roller mill, particularly intended for dressing ores. To reduce the energy demand for comminution and classifying a grinding product, a classifying device is positioned below the grinding area and to it is supplied the comminuted ground material under gravity action, as well as classifying air from an annular chamber in the lower region of the grinding bowl and which has at least one fine material outlet and coarse material outlet.
    Type: Grant
    Filed: October 19, 2006
    Date of Patent: April 6, 2010
    Assignee: Loesche, GmbH
    Inventors: André Baetz, Michael Keyβner, Udo Meyer
  • Patent number: 7665681
    Abstract: A roller mill for pulverizing material and separating the pulverized material has a mill for crushing the material and a classifier disposed on the mill for separating the crushed material. The mill includes a grinding mechanism that has a plurality of grinding rolls and a grinding ring that coact to pulverize material within a mill housing, which defines a grinding chamber. The classifier is a centrifugal-type classifier having a motor-driven rotor disposed within a classifier housing, which define a classifying chamber. The rotor has a plurality of blades that extend outwardly from the rotor. As the rotor rotates within the classifying chamber, the blades separate fine sized particles from oversized particles by passing the finer sized particles through the blades, and contacting and propelling the oversized particles against the classifier housing. The oversize particles fall downward through an outer annular passage defined by a baffle and the mill housing back to the grinding mechanism.
    Type: Grant
    Filed: November 14, 2007
    Date of Patent: February 23, 2010
    Assignee: ALSTOM Technology Ltd
    Inventor: Michael M. Chen
  • Patent number: 7661611
    Abstract: To provide a method for producing a toner, containing a milling step containing finely milling particles and classifying coarse particles by using at least a mill and a cyclone unit, and a classifying step containing classifying pulverized particles by using at least a classifier and a cyclone unit, wherein any of the pulverized particles and other particles, which are classified by the classifier in the classifying step and returned, are returned to the cyclone unit in the milling step, and a toner produced by the method for producing the toner.
    Type: Grant
    Filed: May 23, 2007
    Date of Patent: February 16, 2010
    Assignee: Ricoh Company, Ltd.
    Inventors: Kohji Kubota, Shoji Watanabe, Kohta Wakimoto, Nobuyasu Makino
  • Patent number: 7654396
    Abstract: A classifier capable of stably providing particles by further reducing the mixing ratio of coarse particles including a rotating fin (21) classifying solid particles by a centrifugal force, a cylindrical downward flow forming member (13) installed on the outer peripheral side of the rotating fin (21), a recovery cone (11) disposed under the rotating fin (21) and the downward flow forming member (13), and a housing (41). A contraction flow area (16) is formed between the housing (41) and the recovery cone (11), and a two-phase flow (52) formed of the mixture of the solid particles and gases blown up through the contraction flow area (16) is collided with the downward flow forming member (13) on the upper side of the housing (41) to form it in a downward flow. Then, that flow is led to the rotating fin side, classified into the fine particles and the coarse particles, and the fine particles are carried together with an airstream, passed through the rotating fin (21), and removed.
    Type: Grant
    Filed: May 12, 2005
    Date of Patent: February 2, 2010
    Assignee: Babcock-Hitachi Kabushiki Kaisha
    Inventors: Yutaka Takeno, Hiroaki Kanemoto, Teruaki Tatsuma, Takashi Harada, Taketoshi Tanabe
  • Patent number: 7624936
    Abstract: A granular material grinder and method of use includes a hammer mill for reducing incoming granular material into particulate material, a microgrinder for reducing the particulate matter into microground powder by particulate matter to particulate matter collisions, and a product collector to collect the microground powder portion. The granular material grinder having the feature of being operated in a closed system to facilitate efficient recovery of grain into microground powder and operable in a cooled inert gas to prevent any compound degradation due to temperature or oxygen.
    Type: Grant
    Filed: January 5, 2007
    Date of Patent: December 1, 2009
    Inventor: Roger A. Montag
  • Publication number: 20090283018
    Abstract: A clean dry white glass powder useful as a substitute for Portland cement in concrete, in paints, and for other known uses for glass powder produced conventionally can be produced from unsorted post-consumer waste glass, including a substantial fraction of non-glass items, by employing glass pulverizing equipment to reduce waste glass to small fragments, allowing removal of trash, employing a multistep washing process to clean the glass fragments, in the preferred embodiment using aggregate cleaning equipment, drying the fragments, preferably using fluidized bed techniques, and grinding the glass to a desired particle size, preferably using a ball mill, in combination with an air classification step to produce a bright white glass powder of uniform particle size.
    Type: Application
    Filed: May 15, 2008
    Publication date: November 19, 2009
    Inventors: Louis P. Grasso, JR., Louis P. Grasso, SR., Patrick S. Grasso, SR., Elliot Kracko, Cynthia A. Andela
  • Publication number: 20090212141
    Abstract: A milling apparatus comprising a milling chamber loadable with a grinding charge; an inlet to the milling chamber via which a material to be milled is introduced into the milling chamber; and an outlet from the chamber via which milled material is extracted from the milling chamber; wherein a rotatingly driven centrifuge grinding separator is located within the milling chamber which separator comprises: an upper plate formed with a plurality of diagonally formed through slots; a lower plate formed with a plurality of diagonally formed through slots; and a ring located between the upper and lower plates formed with a plurality of diagonally formed through slots; arranged such that rotation of the central ring formed with the diagonal slots continually pressurizes such a grinding charge so as to force such a grinding charge from the centre of the separator upward and over the periphery of the separator and downward and under en the periphery of the separator and rotation of the upper and lower plates formed wit
    Type: Application
    Filed: June 2, 2006
    Publication date: August 27, 2009
    Inventor: Alan Taylor
  • Publication number: 20090206186
    Abstract: The invention relates to processing apparatus and methods and in particular, but not exclusively, to an apparatus that may be used to process a wide variety of feed materials by one or more of milling or grinding, mixing, blending, separation, drying and sterilisation. In a preferred embodiment there is provided a feed material processing apparatus (1) comprising: a chamber (2); at least one inlet (4) in flow communication to an upper region of the chamber (2); a rotor (3) located within the chamber (2) that is rotatable about a substantially vertical axis by a rotation drive (11), wherein the rotor (3) promotes a circulatory flow of feed material and/or gas within the chamber (2); at least one outlet (5) in flow communication from a lower region of the chamber (2). Preferably the apparatus (1) comprises at least one feature located laterally on the rotor (3) to promote the circulatory flow.
    Type: Application
    Filed: January 14, 2005
    Publication date: August 20, 2009
    Inventors: Michael Joseph Morrison, Axel Guenther Andre
  • Patent number: 7487929
    Abstract: A grinding circuit includes ore and fluid feed lines, a grinding mill connected to the feed lines, a grinding chamber to produce a crushed resultant fluid having ground fines and large particulate therein, a cyclone for receiving crushed resultant fluid having ground fines and large particulate and for expelling at least part of the fluid and the ground fines and dispelling a remainder of the fluid, large particulate and another part of fine grounds gravity flow, a pump to cause the first crushed resultant to flow into the cyclone, a second fluid feed line. A density separator receives the remainder and additional fluid to cause upflow current therethrough such that a part of mixed fluids and the large particulate gravity flow to the grinding mill and at least part of the mixed fluids and another part of the ground fines are circulated back to the cyclone.
    Type: Grant
    Filed: September 27, 2007
    Date of Patent: February 10, 2009
    Inventor: Edward W. Long
  • Patent number: 7461799
    Abstract: This invention relates to industrial production of fine dispersed powders, where the material to be pulverized is mixed with high-pressure working into a gas-solids suspension, which through acceleration nozzles (8) is conveyed to the pulverizing chamber of counterjet pulverizer (9) for autogenous pulverization. The method is known in that the pulverized gas solids suspension is conveyed in the pulverizing circle at least to one intermediate tank (12), where the gas is removed from the blend and solids are collected into intermediate tank (12), which are returned together with new raw material for pulverization till in the equipment a wanted circulation load is achieved, whereafter the process continues so that from it as much ready product is removed as new material is added to it.
    Type: Grant
    Filed: October 10, 2003
    Date of Patent: December 9, 2008
    Assignee: Micropulva Ltd Oy
    Inventors: Jouko Niemi, Jarkko Tamminen
  • Publication number: 20080296422
    Abstract: The invention relates to a roller mill, particularly intended for dressing ores. To reduce the energy demand for comminution and classifying a grinding product, a classifying device is positioned below the grinding area and to it is supplied the comminuted ground material under gravity action, as well as classifying air from an annular chamber in the lower region of the grinding bowl and which has at least one fine material outlet and coarse material outlet.
    Type: Application
    Filed: October 19, 2006
    Publication date: December 4, 2008
    Applicant: LOESCHE GMBH
    Inventors: André Batz, Michael Keyssner, Udo Meyer
  • Patent number: 7438245
    Abstract: Disclosed is a milling and classifying apparatus, adapted to produce toner fine particles, comprising a collision mill, and an air classifier, wherein the collision mill comprises a jet nozzle room, a path, a collision plate, and a collision member mounted to a support of the collision plate at downstream of the collision plate, the air classifier comprises a dispersion room and a classification room, the classification room is disposed below the dispersion room, and a flow stabilizer is arranged at a central suction of the separator core to control swirl stream generated within the classification room so as to centrifuge the powder into coarse particles and fine particles by action of the swirl stream.
    Type: Grant
    Filed: July 12, 2005
    Date of Patent: October 21, 2008
    Assignee: Ricoh Company, Ltd.
    Inventors: Masahiro Kawamoto, Kohta Wakimoto, Kohji Kubota, Mamoru Kawaguchi, Yoshiyuki Okegawa, Hideyuki Ueda, Masayuki Kakimoto, Hiroaki Sugiyama, Tomoyuki Yamada, Yuuichi Kohyama, Masato Kobayashi, Fumio Nishide, Kenkoh Degura, Hirofumi Yamanaka, Tohru Suganuma, Shoji Watanabe, Ikuo Tasaki
  • Patent number: 7370820
    Abstract: A method for harvesting weighting agent fines includes milling weighting agent into a plurality of pieces, classifying the pieces based on size to extract those particles having a particle size less than an acceptable maximum diameter, reclassifying the pieces based on size to extract those particles having a particle size less than an acceptable minimum diameter, collecting the particles having a particle size between the standard acceptable minimum and maximum diameters, and collecting the particles having a particle size less than the acceptable minimum diameter. A system for harvesting weighting agent fines includes a mill to reduce the weighting agent particle size, a first classifier to extract particles having a particle size less than the acceptable maximum diameter, a second classifier to extract particles having a particle size less than the acceptable minimum diameter, a fine particle collection area, and a coarse particle collection area.
    Type: Grant
    Filed: January 31, 2005
    Date of Patent: May 13, 2008
    Assignee: M-I L.L.C.
    Inventors: Neale Browne, Mukesh Kapila
  • Publication number: 20080087752
    Abstract: A machine for distributing blowing insulation including a shredding chamber configured to shred and pick apart the blowing insulation. The shredding chamber includes a plurality of low speed shredders, an agitator and a discharge mechanism. The agitator is mounted for rotation and rotates toward the discharge mechanism. The discharge mechanism includes a side inlet configured to receive the blowing insulation from the agitator. A baffle is disposed between the agitator and the discharge mechanism. The baffle is configured to partially obstruct the side inlet of the discharge mechanism. The baffle allows finely shredded blowing insulation to enter the side inlet of the discharge mechanism and directs heavy clumps of blowing insulation past the side inlet of the discharge mechanism for eventual recycling into the low speed shredders.
    Type: Application
    Filed: October 16, 2006
    Publication date: April 17, 2008
    Inventors: Michael W. Johnson, Michael E. Evans, Agustin Hernandez, Robert J. O'Leary, Christopher M. Relyea, Brian K. Linstedt, Gregory J. Merz, Jeffrey W. Servaites, Keith A. Grider
  • Patent number: 7300007
    Abstract: The aim of the invention is to create a compact circulating grinding plant comprising a product bed comminution roller mill or roller press and a sifter device, in which the problem of mechanically transporting the grinding product that is directed through the circuit is minimized. Said aim is achieved by a circulating grinding plant in which a static cascade sifter is disposed below the gap of the roller press while a subsequent sifter, particularly a dynamic rod basket sifter, is disposed above said roller press. The sifting product discharge area of the static cascade sifter is connected to the sifting air and sifting product inlet of the subsequent sifter via an ascending duct which pneumatically conveys the product.
    Type: Grant
    Filed: May 14, 2003
    Date of Patent: November 27, 2007
    Assignee: KHD Humboldt Wedag GmbH
    Inventors: Alexander Hagedorn, Frank Fischer-Helwig, Christian Splinter, Meinhard Frangenberg
  • Patent number: 7264185
    Abstract: The invention provides a dry grinding system including grinding means for dry-grinding a material to be ground; first classification means for classifying a ground product obtained through the grinding means, into fine powder having a relatively small average particle size and coarse powder having a relatively large average particle size; second classification means for further classifying the coarse powder obtained through the first classification means, into find powder having a relatively small average particle size and coarse powder having a relatively large average particle size; and returning means for returning to the grinding means the coarse powder obtained through the second classification means. The invention enables production of a powder product having a desired average particle size at high efficiency.
    Type: Grant
    Filed: June 9, 2006
    Date of Patent: September 4, 2007
    Assignee: Showa Denko K.K.
    Inventors: Shinichiro Tomikawa, Hirokazu Miyazawa
  • Patent number: 7240867
    Abstract: A processing arrangement for manufacturing composite cementitious materials, such as hydraulic blended cements, with significantly reduced Portland clinker minerals content. The arrangement includes a milling unit for pregrinding supplementary cementitious materials and highly reactive pozzolans or mineral fillers, such as fly ash, blast furnace slag, fine quartz, granitic quarry fines, and the like, and a milling unit for pregrinding the Portland cement. The pregrinding units are followed by grinding unit for grinding the preground components. The pregrinding units are adapted to work as an open circuit or as a closed circuit for the material being ground.
    Type: Grant
    Filed: June 7, 2004
    Date of Patent: July 10, 2007
    Assignee: Procedo Enterprises Etablissement
    Inventor: Vladimir Ronin
  • Patent number: 7083130
    Abstract: The invention provides a dry grinding system including grinding means for dry-grinding a material to be ground; first classification means for classifying a ground product obtained through the grinding means, into fine powder having a relatively small average particle size and coarse powder having a relatively large average particle size; second classification means for further classifying the coarse powder obtained through the first classification means, into fine powder having a relatively small average particle size and coarse powder having a relatively large average particle size; and returning means for returning to the grinding means the coarse powder obtained through the second classification means. The invention enables production of a powder product having a desired average particle size at high efficiency.
    Type: Grant
    Filed: October 16, 2003
    Date of Patent: August 1, 2006
    Assignee: Showa Denko K.K.
    Inventors: Shinichiro Tomikawa, Hirokazu Miyazawa
  • Patent number: 7073737
    Abstract: The invention relates to a rotary tube mill and to a method of comminuting lumpy mill feed material, in which at least a first and a second grinding chamber as well as a co-rotating partition disposed between the grinding chambers are used. The material ground in the first grinding chamber is divided in the partition into first and second part-quantities of mill feed material, whereby at least a part of the second part-quantity of mill feed material proceeds into the second grinding chamber and at least the first part-quantity of the mill feed material is discharged separately from the tube mill.
    Type: Grant
    Filed: November 28, 2002
    Date of Patent: July 11, 2006
    Assignee: Polysius AG
    Inventors: Ludger Schulte, Frank Ungethüm, Robert Schnatz, Thomas Rüther, Ludwig Könning, Jens Reimers, Hubert Eickholt, Dirk Dilly, Heinz Alker, Reinhard Giesemann
  • Patent number: 6988683
    Abstract: Apparatus (2) for crushing glass or ceramic material, which apparatus (2) comprises a rotor (4), rotor blades (6) on the rotor (4), at least one stationary blade (8) which cooperates in use with the rotor blades (6) as the rotor (4) rotates, and a chamber (16) for receiving crushed glass or ceramic material (18), the apparatus (2) being such that the rotor (4) is upstream of the chamber (16), the glass or ceramic material (18) is first broken into fragments (20) on impact with the rotor (4), the fragments (20) are reduced in size and formed into cullet (22) by passing through a gap (24) between the rotor blades (6) and the stationary blade (8), and the action of the rotor blades (6) and the stationary blade (8) causes the cullet (22) to be such that it will not cut, is safe for handling, and is suitable for further use without further processing.
    Type: Grant
    Filed: March 20, 2001
    Date of Patent: January 24, 2006
    Assignee: Global Eneco Limited
    Inventor: Stephen Whettingsteel
  • Patent number: 6969017
    Abstract: A comminuting apparatus is provided having a frame, a set of overlapping scissor rolls, a shear outtake manifold, and a pneumatic conveyor. The frame has an enclosure with an entrance for receiving waste material. The set of overlapping scissor rolls includes a feed scissor roll and a recirculation scissor roll, both the feed scissor roll and the recirculation scissor roll being carried for co-rotation within the enclosure and operative to comminute the waste material into subdivided pieces by drawing the received waste material beneath the feed scissor roll and up between the feed scissor roll and the recirculation scissor roll. The shear outtake manifold is beneath the scissor rolls and is configured to collect the subdivided pieces of waste material.
    Type: Grant
    Filed: November 10, 2003
    Date of Patent: November 29, 2005
    Inventor: Jere F. Irwin
  • Patent number: 6902126
    Abstract: A hybrid turbine classifier for a coal pulverizer includes a cone disposed within the separator body of the pulverizer. The cone extends downwardly from a base to a frustum which forms an opening for depositing coal particles on the grinding table of the pulverizer. The outer surface of the cone and the separator body define an outer passage for coal/air flow, containing a mixture of smaller and larger coal particles, from the grinding table. A circular, first classifier cage disposed proximate to the base of the cone defines a circumferential passage between the outer passage and the cavity of the cone. The first classifier cage includes static, circumferentially-spaced vanes which direct the coal/air flow in a spiraling, circular flow path within the cavity. The flow path defines a first flow direction. A circular, second classifier cage is coaxially disposed within the first classifier cage.
    Type: Grant
    Filed: November 4, 2002
    Date of Patent: June 7, 2005
    Assignee: ALSTOM Technology Ltd
    Inventors: Michael M. Chen, Jianrong Chen
  • Patent number: 6820829
    Abstract: An apparatus for sorting particles composed of a mixture of particles with differing physical and chemical characteristics. The apparatus includes a comminutor or a pulverizer for reducing the size of the particles. The apparatus includes a mechanism for separating undesired material from desired material.
    Type: Grant
    Filed: February 25, 2000
    Date of Patent: November 23, 2004
    Assignee: EXPORTech Company, Inc.
    Inventors: Robin R. Oder, Russell E. Jamison
  • Patent number: 6789756
    Abstract: An improved vortex mill for milling a substantially particulate solid material, which includes one or more working chambers. The mill also includes one or more working fluid inlets and one or more discharge ports. One or more working fluid inlets together with one or more discharge ports facilitate the vortex flow within the one or more working chambers. There are also one or more feed inlets to provide milling of the solid material, which is discharged from one or more discharge ports. In addition, there is apparatus for inducing controlled perturbations in the flow of the working fluid in the one or more working chambers, thereby to improve the milling of the solid material in the vortex flow.
    Type: Grant
    Filed: February 20, 2002
    Date of Patent: September 14, 2004
    Assignee: Super Fine Ltd.
    Inventor: Yan Beliavsky
  • Patent number: 6786437
    Abstract: A method and apparatus for comminuting and drying material utilizing a closed-loop cyclonic system including a cyclonic comminution chamber, and further incorporating heated or dried air for desiccation of the material, as well as reducing the air pressure of the system to provide enhanced drying of the material. The present invention further contemplates to a cyclonic mill system configured to fiberize and dewater cellulose and other materials in a highly efficient and cost effective manner. The present system employs indirect heat drying and fiberizing for the continuous drying and processing of moist cellulose (i.e., bagasse, paper, etc) material by cyclonically agitating same in a hot air flow via a specially designed cyclonic mill, which is configured to effectively dewater and decimate wet cellulose material from a variety of sources for form fiberized cellulose material suitable for thermal insulation or other products.
    Type: Grant
    Filed: May 24, 2002
    Date of Patent: September 7, 2004
    Inventor: Harris J. Ribardi
  • Patent number: 6719610
    Abstract: A particulate grinding method and device applies different force fields to drive the grinding medium and the particulates move in different routes but collide only at a grinding area so that they are separated naturally without conventional screening mechanisms, such as a screen or a gap, and prevented from the limitation of mechanical size of the components. Moreover, the invention is applicable to finer particulates. The circulation of particulates is not limited by any small gap of screening mechanisms, so the particulates ill not block the separator.
    Type: Grant
    Filed: October 16, 2002
    Date of Patent: April 13, 2004
    Assignee: Industrial Technology Research Institute
    Inventors: Ta-Hsin Chou, Wen-Yeu Lee, Lei-Yi Chen
  • Publication number: 20040007635
    Abstract: The invention relates to a grinding circuit for use in a flue gas desulfurization system. The circuit comprises a mill for grinding limestone in water to form a limestone particle slurry. The thus-formed slurry is pumped to a hydrocyclone classifier which separates the limestone slurry into a slurry containing oversized particles that are to be reground in the mill and a slurry containing particles suitable for product which are sent to a product tank inlet for subsequent use in the flue gas desulfurization system. In the present system, the hydrocyclone classifier is elevated above the feed inlet into the mill but below the product tank inlet and, consequently, while the oversized particles are directed by gravity from the hydrocyclone to the mill feed inlet, the particles suitable for use in the flue gas desulfurization system are pumped from the hydrocyclone outlet to the product tank inlet.
    Type: Application
    Filed: July 12, 2002
    Publication date: January 15, 2004
    Inventors: Daniel J. Quay, Mark D. Solomon, Russel W. Steffy
  • Patent number: 6666394
    Abstract: In the production of meal-fine products by a milling process the milling material generated in a comminuting device is ordinarily separated at the desired grain size in a downstream sifter and the fine material (meal-fine product) obtained here is then separated in the fine material separating device from the sifting air. According to the invention it is proposed to construct the sifter as a V-sifter and to connect this latter, without interposition of the otherwise ordinarily used pipelines, directly with the fine material separating device, preferably an electro-filter.
    Type: Grant
    Filed: October 19, 2000
    Date of Patent: December 23, 2003
    Assignee: KHD Humboldt Wedag AG
    Inventors: Albert Süssegger, Siegfried Strasser
  • Patent number: RE45290
    Abstract: Clean glass particles are produced from post-consumer mixed glass and like waste streams by a series of pulverizing, size- and material-based separation, ozonation, drying, sizing, and paper fluff removal steps.
    Type: Grant
    Filed: August 1, 2013
    Date of Patent: December 16, 2014
    Assignee: Glass Processing Solutions, LLC
    Inventor: Cynthia Andela