Waste Material Employed As Raw Material Or Fuel (not Kiln Dust) Patents (Class 106/745)
  • Patent number: 10676395
    Abstract: An arrangement for burning lime mud into lime in a lime kiln. The lime mud flows counter-currently to flue gases from a feed end to a firing end and the fuel used is flue gas that is produced by gasifying a fuel in the presence of combustion air in a gasifier. The combustion air for gasification is preheated with heat generated in lime mud combustion. The arrangement is provided with a conduit between the lime kiln and the gasifier for leading air from the lime kiln into the gasifier as combustion air. At least a portion of the combustion air for gasification is preheated with heat generated in the lime mud combustion so that air is led into cooling of lime obtained in the combustion and further into the kiln, from or through the firing end of which air is taken into the gasification.
    Type: Grant
    Filed: May 9, 2017
    Date of Patent: June 9, 2020
    Assignee: Andritz Oy
    Inventor: Juhani Vehmaan-Kreula
  • Patent number: 10260809
    Abstract: A method and a corresponding plant for denitrifying bypass exhaust gases in a cement clinker production plant. Raw meal is sintered in a rotary kiln and deacidified in a calciner. A rotary kiln inlet chamber is connected to the calciner directly or by a riser duct. Bypass exhaust gas is drawn off near the inlet chamber. This exhaust gas is guided into a first mixing chamber, in which the exhaust gas is cooled to between 800 and 950 degrees C., then the exhaust gas is guided through a reaction pipeline segment, wherein the dwell time is between 0.5 and 3 seconds and ammonia, aqueous ammonia solution, or ammonia-releasing substances are injected for denitrification. Then the exhaust gas is guided into a second mixing chamber, in which the exhaust gas is cooled to between 150 250 degrees C. Then the exhaust gas is guided to a filter for dust removal.
    Type: Grant
    Filed: March 2, 2016
    Date of Patent: April 16, 2019
    Assignee: KHD Humboldt Wedag GmbH
    Inventors: Heiko Schuermann, Florian Nassenstein, Andreas Hand, Rolf Gussmann
  • Patent number: 9969881
    Abstract: A highly loaded and well-dispersed masterbatch composition and process for making thereof from a split stream process. The masterbatch composition includes a colorant, a thermoplastic carrier, a metallocene polymer processing aid, and optionally an additive. The split stream may be formed of a primary feed and a secondary feed. The primary and second feeds are combined by at least one of the following: supplying the secondary feed in either the same feed port as the primary feed, in a stream located upstream the primary feed, in a stream located downstream the primary feed, or a combination thereof.
    Type: Grant
    Filed: July 18, 2014
    Date of Patent: May 15, 2018
    Assignee: CAROLINA COLOR CORPORATION
    Inventors: Jeffrey S. Smink, Ronald M. Harris
  • Patent number: 9868666
    Abstract: The cement clinker production system includes: a first supplying section configured to supply a sulfur source and a fluorine source of mineralizer; a second supplying device configured to supply clinker raw material; a crusher configured to crush the mixed raw material obtained by mixing the clinker raw material with the fluorine source of the mineralizer; a kiln configured to burn the crushed mixed raw material; an introducing section configured to introduce the sulfur source of the mineralizer to the kiln; a third supplying section configured to supply fuel to the kiln; and a test sample-analyzing system configured to collect each of the mixed raw material before the burning and the clinker after the burning and to measure amounts of the fluorine, main components and free lime depending on the type collected.
    Type: Grant
    Filed: December 20, 2012
    Date of Patent: January 16, 2018
    Assignee: MITSUBISHI MATERIALS CORPORATION
    Inventors: Makio Yamashita, Hisanobu Tanaka, Yukio Tanaka, Katsuhiko Ichihara, Kazuo Sakamoto, Kazuo Tabata
  • Patent number: 9725363
    Abstract: A fuel made from co-products derived from a lignocellulosic biomass fermentation process is used to fuel a cement production process. Filter cake and syrup co-products are mixed and dried, then burned in a cement kiln to create the temperatures needed for cement production.
    Type: Grant
    Filed: October 9, 2014
    Date of Patent: August 8, 2017
    Assignee: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: John C Deruyter, Kenneth Miles Hill, Steven W Ogle, Stephanie C Vrakas
  • Patent number: 9403718
    Abstract: Disclosed is a process for calcining active blending material involving feeding material outside of a kiln head and the blending material obtained. The process comprises feeding material from outside of kiln head of rotary kiln into inside of kiln hood and to grate cooler, wherein the material is coal gangue, shale, clay, peat, mud and the like which can form active cement component through low temperature calcining, and calcining the material at low temperature. Disclosed also is a cement production apparatus for carrying out the process provided, comprising feeder nose(s) provided on the kiln hood and/or grate cooler for feeding the material.
    Type: Grant
    Filed: May 22, 2012
    Date of Patent: August 2, 2016
    Assignee: Luzhou Landlong Cement Co., Ltd.
    Inventor: Zhengliang Qi
  • Patent number: 9399592
    Abstract: In a method for utilizing phosphorus-containing alternative fuels in the cement clinker production, the alternative fuels are thermolyzed using waste heat from the cement clinker production process in a thermolysis reactor different from a rotary kiln of the cement clinker production process, the energy released thereby is supplied to the cement clinker production process, and the thermolysis residues of the phosphorus-containing alternative fuels are discharged from the thermolysis reactor, so that the thermolysis residues of the phosphorus-containing alternative fuels are mixed in the thermolysis reactor with cement kiln bypass products as halogen carriers and the heavy-metal halides produced are drawn off.
    Type: Grant
    Filed: December 15, 2010
    Date of Patent: July 26, 2016
    Assignee: HOLCIM TECHNOLOGY LTD
    Inventors: Marc Brülhart, Frank O. Ernst, Luiz Carlos Reichenbach De Sousa
  • Patent number: 8961684
    Abstract: A method and system for producing modified coal combustion products are disclosed. The additives reduce the particle sizes of the coal combustion product and may reduce the amount of un-burned carbon in the coal combustion product, making the modified product useful as an addition to cementitious materials.
    Type: Grant
    Filed: January 14, 2013
    Date of Patent: February 24, 2015
    Assignee: Ash Improvement Technology Inc.
    Inventor: Wayne Fried
  • Patent number: 8882906
    Abstract: The present invention relates to a method for recycling waste water from a stainless steel slag treatment process wherein stainless steel slag is brought into contact with water, in particular to neutralize the free lime contained therein, thereby producing said waste water. This waste water contains heavy metals, including at least chromium, and has a pH higher than or equal to 11. In accordance with the invention, it is used as production water for manufacturing mortar and/or concrete. In this way, the heavy metals, which are dissolved in the waste water and thus readily available, become bound in the newly formed cement phases so that they are prevented from leaching. Moreover, it has been found that the workability of the fresh mortar or concrete and also the quality of the final mortar or concrete materials is not negatively affected by the use of this alkaline waste water and that an accelerated setting could be achieved during the first hours.
    Type: Grant
    Filed: July 18, 2011
    Date of Patent: November 11, 2014
    Assignee: Recoval Belgium
    Inventors: Dirk Van Mechelen, Isabelle Lecomie, Evelyne Nguyen
  • Patent number: 8858705
    Abstract: The invention relates to a process for the production of binders by calcinating mineral raw material mixtures. In order to improve the process and the quality of the binders, it is proposed that oil shale and/or oil sand fills are converted by targeted agglomeration into particles of a certain size and consistency, wherein the water content for the mechanical stabilization of the agglomerate is adjusted to less than 25 percent and the agglomerates are calcinated to form binders at temperatures between 800 and 1500° C. under reductive conditions over the entire process with a Lambda value <1 in a vertical shaft furnace with updraft gasification. The binding properties are adjusted by the targeted addition of CaO-containing substances and/or existing sulfur fractions of the oil sands and/or oil shales are bound by means of the CaO that is present in the starting material and/or added.
    Type: Grant
    Filed: March 16, 2012
    Date of Patent: October 14, 2014
    Assignee: Ecloloop GmbH
    Inventors: Thomas Stumpf, Ulf Boenkendorf, Leonhard Baumann, Roland Möller
  • Publication number: 20140261090
    Abstract: In various aspects, systems and methods are provided for operating molten carbonate fuel cells with processes for cement production. The systems and methods can provide process improvements including increased efficiency, reduction of carbon emissions per ton of product produced, and simplified capture of the carbon emissions as an integrated part of the system. The number of separate processes and the complexity of the overall production system can be reduced while providing flexibility in fuel feed stock and the various chemical, heat, and electrical outputs needed to power the processes.
    Type: Application
    Filed: March 13, 2014
    Publication date: September 18, 2014
    Applicant: EXXONMOBIL RESEARCH AND ENGINEERING COMPANY
    Inventors: Paul J. Berlowitz, Timothy Andrew Barckholtz, Anita S. Lee
  • Patent number: 8795616
    Abstract: A system and method of using a double-effect-reactor to dispose incinerated flue gas and improve cement yields. The double-effect-reactor features an incinerated reaction chamber and a gas-solid suspension mixing chamber. The system includes the double-effect-reactor, a high temperature dust-arrester, a system for recovery of thermal energy and dust removal, a triple valve, and an independent chimney. Also disclosed is a method in which combines the double-effect-reactor with a cement production system.
    Type: Grant
    Filed: December 26, 2011
    Date of Patent: August 5, 2014
    Assignee: Satarem Technologies Limited
    Inventor: Ching Chiu Leung
  • Patent number: 8677913
    Abstract: A method and apparatus for incinerating combustion material in the form of combustible waste during cement production is provided. The method includes introducing combustion material in the form of combustible waste into a combustion chamber and burning the combustion material within a first air flow. In addition, a second air flow in a region of a floor of the combustion chamber is included in such a manner that residues or remaining combustion materials which are located on the floor are moved by the second air flow back into the first air flow. Cement raw meal can also be fed into the combustion chamber.
    Type: Grant
    Filed: August 11, 2005
    Date of Patent: March 25, 2014
    Assignee: Polysius AG
    Inventors: Gerhard Kastingschafer, Frank Ruoss
  • Patent number: 8636840
    Abstract: In a process for utilizing organic waste materials, in particular cellulose-containing, moist, organic waste materials, in a clinker production process in which the waste materials are introduced as fuel and burnt in the clinker production process, the waste materials are brought into contact with the hot exhaust gases of the clinker production process and dried in a drying step flowing in parallel therewith before they are introduced into the clinker production process. The drying step is carried out in a drying reactor in which the moist waste materials are passed together with the hot exhaust gases through a series of concentrically arranged tubes, with multiple changes in flow direction about 180°, and the temperature of the hot exhaust gases is set to a maximum value of 400° C. by mixing in of ambient air and/or air from the clinker production process before the drying step.
    Type: Grant
    Filed: June 22, 2011
    Date of Patent: January 28, 2014
    Assignee: Holcim Technology Ltd
    Inventors: Beat Stoffel, Armando Cruz
  • Patent number: 8523998
    Abstract: A process for producing a geopolymer includes combusting at least one of oil shale and mineral residues originating from a production of oil using the oil shale so as to produce a combustion product. The combustion product is ground. An alkaline activator is added to the combustion product to form a geopolymer mixture. Water is added to the geopolymer mixture. The geopolymer mixture is adjusted so as to obtain a mol ratio of Si:Al of 2 to 5, a mol ratio of K:Al of 0.6 to 0.7, a mol ratio of Si:K of 3 to 10, a mol ratio of Ca:Al of 0.1 to 0.4, and a mol ratio of Si:CA of 4.9 to 41. The geopolymer mixture is hardened.
    Type: Grant
    Filed: November 9, 2010
    Date of Patent: September 3, 2013
    Assignee: Outotec Oyj
    Inventors: Edgar Gasafi, Katja Dombrowski-Daube
  • Publication number: 20130206041
    Abstract: The present invention relates to a method for recycling waste water from a stainless steel slag treatment process wherein stainless steel slag is brought into contact with water, in particular to neutralize the free lime contained therein, thereby producing said waste water. This waste water contains heavy metals, including at least chromium, and has a pH higher than or equal to 11. In accordance with the invention, it is used as production water for manufacturing mortar and/or concrete. In this way, the heavy metals, which are dissolved in the waste water and thus readily available, become bound in the newly formed cement phases so that they are prevented from leaching. Moreover, it has been found that the workability of the fresh mortar or concrete and also the quality of the final mortar or concrete materials is not negatively affected by the use of this alkaline waste water and that an accelerated setting could be achieved during the first hours.
    Type: Application
    Filed: July 18, 2011
    Publication date: August 15, 2013
    Inventors: Dirk Van Mechelen, Isabelle Lecomie, Evelyne Nguyen
  • Patent number: 8474387
    Abstract: A method and apparatus for incinerating different types of combustible waste in a cement manufacturing process. Two combustion chambers for incinerating waste are arranged in series, with first combustion chamber being a down draft chamber in which there is a downward flow of combustion gas and waste fuel to a waste and gas outlet. The second chamber is adaptable to support waste on a supporting surface incorporated in the compartment, wherein the waste is transported through the compartment from a waste inlet to a waste outlet along a circular path.
    Type: Grant
    Filed: June 8, 2009
    Date of Patent: July 2, 2013
    Assignee: FLSmidth A/S
    Inventor: Steven Miller
  • Publication number: 20130152826
    Abstract: In a process for utilizing organic waste materials, in particular cellulose-containing, moist, organic waste materials, in a clinker production process in which the waste materials are introduced as fuel and burnt in the clinker production process, the waste materials are brought into contact with the hot exhaust gases of the clinker production process and dried in a drying step flowing in parallel therewith before they are introduced into the clinker production process. The drying step is carried out in a drying reactor in which the moist waste materials are passed together with the hot exhaust gases through a series of concentrically arranged tubes, with multiple changes in flow direction about 180°, and the temperature of the hot exhaust gases is set to a maximum value of 400° C. by mixing in of ambient air and/or air from the clinker production process before the drying step. (FIG.
    Type: Application
    Filed: June 22, 2011
    Publication date: June 20, 2013
    Applicant: HOLCIM TECHNOLOGY LTD
    Inventors: Beat Stoffel, Armando Cruz
  • Patent number: 8317917
    Abstract: “Green” cements, which can be carbon neutral or negative, can be prepared at lower temperatures (450° C.-500° C.) by utilizing feed compositions comprising (i) TiO2, TaOxNy, TiOxNy, RuO2, Pt, TaO, band gap materials, or a first mixture thereof; (ii) Al2O3; and (iii) Ca2SiO4, MgSiO2, MnSiO2, or a second mixture thereof; and spent wash with melanoidin as a binder.
    Type: Grant
    Filed: October 19, 2010
    Date of Patent: November 27, 2012
    Assignee: Empire Technology Development LLC
    Inventor: Thevasahayam Arockiadoss
  • Patent number: 8268073
    Abstract: Integrated cement production systems and methods implementing the systems are disclosed, where the integrated cement production systems include a burnable fuel supply subsystem, a cement raw material supply subsystem, a kiln subsystem and a cement clinker composition storage subsystem. The burnable fuel supply subsystem is adapted to receive one or a plurality of used and/or unused healthcare materials. The burnable fuel supply subsystem can feed the materials directly into the kiln subsystem, can convert the materials into different form and feed the different form to the kiln subsystem or feed a combination of the materials, different forms and optionally conventional fuels to the kiln subsystem.
    Type: Grant
    Filed: December 29, 2009
    Date of Patent: September 18, 2012
    Assignee: Sharps Compliance, Inc.
    Inventors: Burton J. Kunik, James C. Berns, David G. Gossman
  • Patent number: 8246740
    Abstract: Spent Claus catalyst having a high alumina content is used as an ingredient in the manufacture of Portland cements in place of all or a portion of a conventional source of alumina. The spent Claus catalyst is preferably of a small particle size and can be ground to the desired fineness before mixing with the other ingredients that are heated in a conventional kiln to produce the cement composition. Finely ground spent Claus catalyst can also be used as an additive at levels of 0.1% to 2% by weight to increase the thickening time of shallow casing cement slurries.
    Type: Grant
    Filed: July 12, 2011
    Date of Patent: August 21, 2012
    Assignee: Saudi Arabian Oil Company
    Inventor: Mansour A. Al-Shafei
  • Patent number: 8187374
    Abstract: The invention relates to a process for manufacturing clinker from a raw mix, implementing the following: preheating of the raw mix by combustion flue gases; precalcination of the raw mix; and calcination of the precalcined raw mix in a rotary kiln, in which process the precalcination and the calcination in the rotary kiln produce combustion flue gases that contain CO2, in which the combustion flue gases created by the precalcination undergo a CO2-removal treatment without said flue gases mixing with the combustion flue gases created by the calcination in the rotary kiln.
    Type: Grant
    Filed: October 22, 2007
    Date of Patent: May 29, 2012
    Assignee: L'Air Liquide Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Erwin Penfornis, Guillaume De Smedt
  • Patent number: 8141501
    Abstract: A wet sludge disposal facility is capable of smoothly transferring wet sludge to a kiln inlet part of a dry process kiln by a low feeding pressure and without substantially increasing the moisture content in the wet sludge. The disposal facility is used in a cement clinker manufacturing facility having a preheater for preheating a cement raw material, and a dry process kiln connected to the preheater at the kiln inlet part of the dry process kiln. Wet sludge is transferred to the side of the kiln inlet part by feeding water between the wet sludge and the inner wall surface of the pipe by a water injection apparatus in at least one place between the pressure feed pump and the kiln inlet part.
    Type: Grant
    Filed: August 26, 2005
    Date of Patent: March 27, 2012
    Assignee: Mitsubishi Materials Corporation
    Inventors: Koji Nagamizu, Akihisa Koga, Hiroyuki Terunuma, Yusuke Nakai, Koyuru Horiike, Masafumi Ito
  • Patent number: 8110039
    Abstract: A method of manufacturing a hydratable cementitious material, which includes: a) providing at least one waste material containing calcium, silica, magnesium, aluminium, and/or iron; b) thermally treating each waste material to a first temperature such that surface water vapour present is substantially removed; and c) blending the treated waste material such that the resultant blend has a reactive oxide chemical/physical composition in the following range, by weight of the blend: Calcium Oxide 7.0 to 76% Alumina 0.1 to 30% Iron Oxide 0.4 to 19% Silica Oxide 1 to 36% Magnesia 0.1 to 2%. The resultant blend from step c) may subsequently be mixed with Portland cement.
    Type: Grant
    Filed: April 29, 2004
    Date of Patent: February 7, 2012
    Assignee: Cenin Limited
    Inventor: Gary Hunt
  • Patent number: 8075686
    Abstract: The method for reducing organic chlorine compounds in cement production facility is a method by which a quantity of organic chlorine compounds contained in powder is reduced in the cement production facility, and the method is provided with a heating step for heating the powder to separate the organic chlorine compounds from the powder or decompose the organic chlorine compounds and a gas thermal decomposing step for supplying heat-treated gas containing the organic chlorine compounds generated by heating the powder to a high temperature part of the cement production facility, thereby thermally decomposing the organic chlorine compounds contained in the heat-treated gas.
    Type: Grant
    Filed: June 16, 2006
    Date of Patent: December 13, 2011
    Assignee: Mitsubishi Materials Corporation
    Inventors: Katsuhiko Ichihara, Eiji Koike, Munenori Ohgoshi, Hisanobu Tanaka, Ichiro Ebato, Kimitoshi Mizutani
  • Publication number: 20110265692
    Abstract: Spent Claus catalyst having a high alumina content is used as an ingredient in the manufacture of Portland cements in place of all or a portion of a conventional source of alumina. The spent Claus catalyst is preferably of a small particle size and can be ground to the desired fineness before mixing with the other ingredients that are heated in a conventional kiln to produce the cement composition. Finely ground spent Claus catalyst can also be used as an additive at levels of 0.1% to 2% by weight to increase the thickening time of shallow casing cement slurries.
    Type: Application
    Filed: July 12, 2011
    Publication date: November 3, 2011
    Inventor: Mansour A. AL-SHAFEI
  • Patent number: 8038791
    Abstract: A cement product is disclosed. The cement product includes clinker defined by a feedstock material and a ladle metallurgical facility slag material derived from a ladle metallurgical facility steel production system. A system and method for manufacturing clinker is also disclosed.
    Type: Grant
    Filed: June 25, 2007
    Date of Patent: October 18, 2011
    Assignee: Edw. C. Levy Co.
    Inventor: Ronald Robert Piniecki
  • Patent number: 8029618
    Abstract: Spent Claus catalyst having a high alumina content is used as an ingredient in the manufacture of Portland cements in place of all or a portion of a conventional source of alumina. The spent Claus catalyst is preferably of a small particle size and can be ground to the desired fineness before mixing with the other ingredients that are heated in a conventional kiln to produce the cement composition. Finely ground spent Claus catalyst can also be used as an additive at levels of 0.1% to 2% by weight to increase the thickening time of shallow casing cement slurries.
    Type: Grant
    Filed: September 21, 2005
    Date of Patent: October 4, 2011
    Assignee: Saudi Arabian Oil Company
    Inventor: Mansour A. Al-Shafei
  • Patent number: 7906028
    Abstract: Hydraulic cement compositions that include a carbonate compound composition, e.g., a salt-water derived carbonate compound composition containing crystalline and/or amorphous carbonate compounds, are provided. Also provided are methods of making and using the hydraulic cements, as well as settable compositions, such as concretes and mortars, prepared therefrom. The cements and compositions produced therefrom find use in a variety of applications, including use in a variety of building materials and building applications.
    Type: Grant
    Filed: February 4, 2010
    Date of Patent: March 15, 2011
    Assignee: Calera Corporation
    Inventors: Brent R Constantz, Cecily Ryan, Laurence Clodic
  • Publication number: 20100175591
    Abstract: In a method for introducing waste substances and/or alternative fuels into a clinker production process, the raw materials, in the form of slurries or suspensions, are subjected to mechanical deagglomeration as a pumpable mass. The pumpable mass is ejected into risers, precalciners and/or the rotary tubular kiln. The device for carrying out the method is characterized by a tubular housing (1) including a rotor (2) mounted to be rotational substantially concentrically with the tube axis and driveable for rotation with blades (3) sweeping over the space between the rotor shaft and the housing wall, wherein a plurality of ducts and openings (6, 7, 11, 14) are connected to the shell of the tubular housing (1), and at least one duct (6) is arranged with the slurry supply and at least one duct is offset in the peripheral direction.
    Type: Application
    Filed: October 17, 2007
    Publication date: July 15, 2010
    Applicant: Holcim Technology Ltd.
    Inventors: Alexander Flacher, Werner Voramwald
  • Patent number: 7744691
    Abstract: Pozzolan compositions incorporate glassy, amorphous particulates derived from byproducts of processes in which substantial energy was invested in generating those byproducts, at least one of which comprises amorphous calcium silicate slag generated as a byproduct of phosphorous production. The calcium silicate particulate is blended with one or more additional pozzolans, preferably one or more particulates of a material selected from the group consisting of fused silica of the type generated as a byproduct of making refractory grade fused silica and cullet glass of the type rejected from glass making processes. Pozzolanic cements incorporating up to about 50% by weight of such pozzolan compositions are also disclosed.
    Type: Grant
    Filed: April 10, 2008
    Date of Patent: June 29, 2010
    Assignee: Calcium Silicate Corporation
    Inventors: Mark C. Elizer, Ronald W. Reed
  • Patent number: 7735274
    Abstract: Hydraulic cement compositions that include a carbonate compound composition, e.g., a salt-water derived carbonate compound composition containing crystalline and/or amorphous carbonate compounds, are provided. Also provided are methods of making and using the hydraulic cements, as well as settable compositions, such as concretes and mortars, prepared therefrom. The cements and compositions produced therefrom find use in a variety of applications, including use in a variety of building materials and building applications.
    Type: Grant
    Filed: May 23, 2008
    Date of Patent: June 15, 2010
    Assignee: Calera Corporation
    Inventors: Brent R. Constantz, Cecily Ryan, Laurence Clodic
  • Patent number: 7736432
    Abstract: A ready-mix concrete and method for making the ready-mix concrete having mix proportions that include at least 70% course recycled aggregate and fly ash is provided. The ready-mix concrete including cement, air, water, sand and a remaining percent of virgin course recycled aggregate such that the coarse recycled aggregate combines to 100% of the required course aggregate.
    Type: Grant
    Filed: September 9, 2008
    Date of Patent: June 15, 2010
    Assignee: Recrete Materials, Inc.
    Inventors: Jason Buesing, Ken Buesing, Jim Lucero
  • Publication number: 20100132592
    Abstract: An object of the present invention is to provide a wet sludge disposal method and facility capable of smoothly transferring wet sludge to a kiln inlet part, or the like, of a dry process kiln, by a low feeding pressure and without substantially increasing the moisture content in the wet sludge.
    Type: Application
    Filed: August 26, 2005
    Publication date: June 3, 2010
    Inventors: Koji Nagamizu, Akihisa Koga, Hiroyuki Terunuma, Yusuke Nakai, Koyuru Horiike, Masafumi Ito
  • Patent number: 7722717
    Abstract: A hydraulic composition including: a ground burned product A having a hydraulic modulus (H.M.) of 1.8 to 2.3, a silica modulus (S.M.) of 1.3 to 2.3 and an iron modulus (I.M.) of 1.3 to 2.8; and a gypsum. The hydraulic composition is capable of reducing heat of hydration and producing a mortar or a concrete excellent in flowability and strength development.
    Type: Grant
    Filed: September 30, 2004
    Date of Patent: May 25, 2010
    Assignee: Taiheiyo Cement Corporation
    Inventors: Daisuke Sawaki, Susumu Sano, Kenichi Homma, Kouki Ichitsubo, Kenichi Matsumoto, Makihiko Ichikawa
  • Patent number: 7708825
    Abstract: The technical field of the invention belongs to concrete and cement. The invention relates to a sialite binary wet cement and its package, transportation, storage and application. The sialite binary wet cement is composed of a “female body” as a primary component and a “male body” as a secondary component both of which are produced, stored, and transported separately, and are mixed together when they are used, wherein the “female body” and the “male body” each have a specific surface area of 2800-7500 cm2/g, the “female body” is mainly composed of inorganic cementitious materials and water, and it is in slurry, paste or wet powder form during the whole period of its production, storage, transportation and usage; the “male body” is mainly composed of inorganic cementitious materials, and it can be a wet form or a dry powder form. When they are used, the “female body” and the “male body” are mixed together with a small amount of regulating agents.
    Type: Grant
    Filed: December 24, 2003
    Date of Patent: May 4, 2010
    Assignee: Tsinghua University
    Inventors: Henghu Sun, Weirui Xu, Guangju Gai, Shuqin Li
  • Patent number: 7699930
    Abstract: A flow enhanced calcium sulfate product includes a calcium sulfate source material, such as a flue gas desulphurization by-product, is pre-blended with a granular feedstock exhibiting good cementitious properties. The flow enhanced calcium sulfate is fed to a cement mill where it is combined with clinker during a finishing grinding process for portland cement. The flow enhanced calcium sulfate exhibits good flowability without changing the properties of the cement.
    Type: Grant
    Filed: November 21, 2006
    Date of Patent: April 20, 2010
    Assignee: LaFarge North America
    Inventors: Horace H. Compton, Nathan A. Fernow, Ajay Joshi
  • Patent number: 7611576
    Abstract: A municipal or like refuse is crushing, mixing with crushed limestone, dry up in two stages—by hot air and by part of solid products of pyrolysis which other part goes on washing out and filtration. Pyrolysis is carried out in two stages—due to heat of the specified part of solid products of pyrolysis and simultaneous neutralization of allocated hydrogen chloride by limestone with reception of calcium chloride, and then due to heat of final chimney gases of the combustion chamber, where in three stages the washed solid products of pyrolysis preliminary drained by a part of combustion chamber slag are burnt together with liquid and gaseous products of pyrolysis. Gas allocated at pyrolysis condense and divide on organic, which is liquid fuel and water phases. Air after a dryer moves to blowing away of light organic substances from the specified water phase, is heated up due to heat of slag and moves in combustion chamber.
    Type: Grant
    Filed: March 30, 2006
    Date of Patent: November 3, 2009
    Inventor: Yuriy Rabiner
  • Patent number: 7481878
    Abstract: A method for the preparation of activated clays and cement additives from contaminated drill cuttings is provided. The substrate can be mixed with a mineral acid in a first reactor. The acidified substrate is then mixed with alkaline earth in a second reactor. The reactions are exothermic and provide heat to vaporize the contaminants, reaction products, and water. Recoverable constituents in the vapor can be condensed in a vapor collection system. The treated substrate can be heated and/or further reacted with acid, resulting in the formation of activated clays. For production of cement additives, the treated substrate can then be heated in a kiln and combined with cement clinker material for the preparation of cement and/or concrete.
    Type: Grant
    Filed: August 12, 2005
    Date of Patent: January 27, 2009
    Assignee: Racional Energy & Environment Co.
    Inventor: Ramon Perez-Cordova
  • Patent number: 7265254
    Abstract: Chlorine-containing waste is processed inside a heating device, an alkali metal compound and a calcium compound are given into the heating device while the temperature of a solid phase inside the heating device is maintained at 400 to 1500° C., chlorine that is contained in the chlorine-containing waste and that has not been bound by the alkali metal compound is bound in the solid phase by the calcium compound, and chlorine is converted into alkali metal chloride from calcium chloride generated in the course of the processing of the chlorine-containing waste.
    Type: Grant
    Filed: July 30, 2002
    Date of Patent: September 4, 2007
    Assignee: Taiheiyo Cement Corporation
    Inventors: Yasushi Yamamoto, Hisanori Aoyama, Tomohisa Yoshikawa, Takemi Aizawa, Takamiki Tamashige, Norihiko Misaki, Michio Matsuno, Yoshimasa Muraoka
  • Patent number: 7258737
    Abstract: A method for recycling concrete waste includes the steps of: a) heating the concrete waste to provide a measure of fragility to the concrete waste; b) milling and sieving the heated concrete waste to separate coarse aggregate from the concrete waste; and c) milling and sieving a remaining portion of the concrete waste remaining after separation of the coarse aggregate to separate the remaining portion of the concrete waste into a cement-containing fraction and fine aggregate.
    Type: Grant
    Filed: May 17, 2005
    Date of Patent: August 21, 2007
    Inventor: Cheng-Feng Chang
  • Patent number: 7189074
    Abstract: The co-combustion process may comprise the following unit operations: routing of hot gas (10) generated in the clinker cooling process to a rotary kiln (1); use of part of the rotary kiln exhaust gas to dry solid wastes in rotary dryers; leading the gases from both the dryer and the combustion kiln to the secondary combustion chamber (2); use of additional fuel to boost up the secondary combustion chamber reaction temperature to as high as 1200° C.; primary dry gas scrubbing in a precalciner or precalciners (3, 3a); heat recovery (4) and power generation; secondary gas scrubbing (5) in a semi-dry scrubber; bag filtering after activated carbon injection and returning of all the collected ash and used carbon into the waste kiln and/or a cement kiln. Detrimental materials for cement processing generated by waste combustion can be by-passed to a scrubbing system and a cement kiln. Residue slag from waste kilns can be treated and reused.
    Type: Grant
    Filed: February 5, 2001
    Date of Patent: March 13, 2007
    Assignee: Green Island Environmental Technologies Company Limited
    Inventors: Ching Chiu Leung, Khine Aung, Wai Man Cheung
  • Patent number: 7135068
    Abstract: A treatment method includes injecting oxygen into the liquid steel works slag, adding and dissolving in the slag alumina and lime sources, and optionally silica and iron sources and cooling the slag until solidification, the additions being carried out in such amounts and the cooling being performed at such speed that the resulting slag has a mineralogical composition having one of the following constituting element: (a) an amorphous glassy phase; (b) a first group of phases (1) consisting, in weight percentages, of 10–40 CA, 20–50 C2AS, 30–50 C6AF2 and 10–30 C2S; (c) a second group of phases (2) consisting, in weight percentages, of 20–40 C2F, 10–30 C2AS, 20–50 C6AF2 and 10–40 C2S, and (d) a mixture of amorphous glassy phase and of the first or second group of phases. The invention is applicable to hydraulic binders.
    Type: Grant
    Filed: May 22, 2001
    Date of Patent: November 14, 2006
    Assignee: Lafarge
    Inventors: François Sorrentino, Guy Chaperon, Jean-Pierre Bayoux
  • Patent number: 7037368
    Abstract: A method for the production of cement clinker comprises the introduction of non-traditional materials into the kiln, preferably at a mid-kiln locations. The non-traditional materials are materials that are difficult, expensive or environmentally challenging for disposal. In one embodiment, weathered clinker is introduced into the kiln to admix with the raw material mix to augment clinker production. In another embodiment, bird, animal or human manure is added to the kiln so that gaseous reducing agents can be released by the manure and combine with certain noxious gases generated during the clinker production, to thereby reduce the noxious gas output. In other embodiments, other non-traditional waste-derived fuels are added to the kiln during clinker production, including railroad ties coated with creosote, industrial, commercial and consumer rubber components, such as rubber hoses, unshredded plastics, and organic materials, such as bird and animal meal.
    Type: Grant
    Filed: April 29, 2004
    Date of Patent: May 2, 2006
    Assignee: Buzzi Unicem USA, Inc.
    Inventor: Lawrence L. Hoffis
  • Patent number: 6908507
    Abstract: A process is disclosed for producing cement clinker, comprising the steps of: a) providing a mixture of ground calcareous materials and ground argillaceous materials; b) heating the mixture of step a) to a temperature sufficient to calcine and fuse the ground materials to form the cement clinker, and thereby producing an exhaust gas containing CO2; c) catalysing the hydration of at least a portion of the CO2 contained in the exhaust gas and producing a solution containing bicarbonate ions and hydrogen ions; and d) adding to the solution obtained in step c) metal ions, and adjusting the pH of the solution to precipitate a carbonate or said metal. Preferably, the metal ions are Ca++ obtained from the dissolution of a material selected from the group consisting of CaCl2, cement kiln dust and sea salts and the carbonate is CaCO3 which is advantageously recycled into the process by adding the CaCO3 to the mixture of step a). A cement plant for performing this process is also disclosed.
    Type: Grant
    Filed: April 12, 2002
    Date of Patent: June 21, 2005
    Assignee: CO2 Solution Inc.
    Inventors: Jean-Marie Lalande, Anne Tremblay
  • Patent number: 6875267
    Abstract: In order to make sure, for cement clinker production lines with blown injection of dispersible solid fuels such as, for example, coal dust, into the calcinator which is provided with fuel, that an open flame does not occur at the fuel injection point, it is proposed according to the invention that the fuel is fed into a meal intake box that has a sloping raw meal chute and deflector slide and is arranged on the outside of the calcinator and connected to it through a wall opening and the fuel is pre-mixed with the pre-heated raw meal there, and then introduced via the deflector slide into the reaction section of the calcinator in order to form a gas-raw meal-solid fuel-suspension that is uniformly distributed.
    Type: Grant
    Filed: November 8, 2002
    Date of Patent: April 5, 2005
    Assignee: KHD Humboldt Wedag AG
    Inventors: Claus-Jürgen Steffler, Wolfgang Müller, Stefan Köllen
  • Patent number: 6855302
    Abstract: In order to provide a comparatively simple and cost-effective method for cement clinker production lines where especially raw materials and/or fuel/secondary fuel containing chlorine compounds and a partial gas extraction with an electrostatic dust collector as waste gas dust remover are used, with which the risk of emitting the waste gas pollutants dioxin and/or furan is eliminated, it is proposed in accordance with the invention that the extracted quantity of the partial gas extraction stream, after cooling and electrostatic dust removal, is held lower than the sum of the secondary air drawn through the rotary kiln and the tertiary air drawn past the rotary kiln, and to recirculate the cooled and dedusted partial gas extraction solely into an area of the clinker cooler in which the recuperation air is removed from the clinker cooler, and the dioxins and/or furans of the partial gas extraction are decomposed in the clinker cooler on the hot cement clinker and/or deposited and/or decomposed by the high temper
    Type: Grant
    Filed: November 13, 2002
    Date of Patent: February 15, 2005
    Assignee: KHD Humboldt Wedag AG
    Inventors: Carsten Eckert, Andreas Hand, Robert Mathai
  • Patent number: 6764544
    Abstract: A method of cement clinker manufacture comprises feeding a clinker feed material containing a source of calcium carbonate into a feed end of a cement kiln, the feed material is heat processed in the kiln to produce cement clinker with emission of carbon dioxide from thermal decomposition of said source of calcium carbonate and discharge of the carbon dioxide from the kiln, and cement clinker is discharged from a discharge end of the kiln; a coal ash derived from burning pulverized lignite or sub-bituminous coal is included in the feed material fed into the feed end to replace a portion of the source of calcium carbonate, and provides a source of calcium as well as other components notably silicon and aluminum, in the formation of the cement clinker, with a lowering of the emission of carbon dioxide in the kiln, per unit weight of cement clinker produced.
    Type: Grant
    Filed: December 23, 2002
    Date of Patent: July 20, 2004
    Assignee: Lafarge Canada Inc.
    Inventors: David Bridson Oates, Alan Van Sloten
  • Publication number: 20040118323
    Abstract: A method of cement clinker manufacture comprises feeding a clinker feed material containing a source of calcium carbonate into a feed end of a cement kiln, the feed material is heat processed in the kiln to produce cement clinker with emission of carbon dioxide from thermal decomposition of said source of calcium carbonate and discharge of the carbon dioxide from the kiln, and cement clinker is discharged from a discharge end of the kiln; a coal ash derived from burning pulverized lignite or sub-bituminous coal is included in the feed material fed into the feed end to replace a portion of the source of calcium carbonate, and provides a source of calcium as well as other components notably silicon and aluminium, in the formation of the cement clinker, with a lowering of the emission of carbon dioxide in the kiln, per unit weight of cement clinker produced.
    Type: Application
    Filed: December 23, 2002
    Publication date: June 24, 2004
    Inventors: David Bridson Oates, Alan Van Sloten
  • Patent number: 6752865
    Abstract: The present invention describes a process for manufacture of high iron hydraulic cement clinker in production of cement and cementation binder for application in construction activity and in metallurgical industry for sintering of iron ore fines and making cold bonded briquettes and pellets. The process is cost effective and flexible for utilization of wide varieties of raw material consisting of lime and iron in production of high iron cements for different applications.
    Type: Grant
    Filed: March 28, 2002
    Date of Patent: June 22, 2004
    Assignee: Council of Scientific and Industrial Research
    Inventors: Bansidhar Nayak, Vibhuti Narayan Misra