Portland Type Cement Per Se (e.g., Clinker Preparation, Etc.) Patents (Class 106/739)
  • Patent number: 10370293
    Abstract: A method for the thermal treatment of dispersible raw material may involve introducing raw material into a riser tube that is perfused by hot gases and thermally treating the raw material with the hot gases. Furthermore, the method may involve feeding a fuel to the riser tube. The fuel may initially dwell in a fuel-conditioning region on a bearing face, where the fuel comes into contact with a part of the hot gas that is mixed with the raw material. Consequently, the fuel is dried and/or at least partially de-gassed and/or at least partially reacted and subsequently transferred into the riser tube.
    Type: Grant
    Filed: September 9, 2015
    Date of Patent: August 6, 2019
    Assignees: THYSSENKRUPP INDUSTRIAL SOLUTIONS AG, THYSSENKRUPP AG
    Inventors: Daniel Klegraf, Sebastian Frie, Henning Brinkschulte
  • Patent number: 9845993
    Abstract: The invention relates to method and to an arrangement for removing outgrowth in a suspension smelting furnace. The suspension smelting furnace comprising a reaction shaft having a reaction shaft structure. The reaction shaft comprises at least one opening for an outgrowth removal means. The movable piston is arranged such that the movable piston can move in the opening in the reaction shaft and into the reaction shaft to push possible outgrowth in the reaction shaft.
    Type: Grant
    Filed: May 8, 2013
    Date of Patent: December 19, 2017
    Assignee: Outotec (Finland) Oy
    Inventors: Peter Björklund, Aki Laaninen, Kaarle Peltoniemi, Lauri Pesonen
  • Patent number: 9822036
    Abstract: The invention discloses a rapid-hardening high-belite calcium sulfoaluminate cement clinker and relates generally to a rapid-hardening high-belite calcium sulfoaluminate cement clinker and methods to use and to manufacture the clinker. The clinker of the present invention comprises 20% to 35% by weight of C4A3S 3% to 9% by weight of C4AF, 37% to 47% by weight of C2S, 0.5% to 4.6% by weight of f-CaO and 14% to 26.3% by weight of CaSO4. The chemical compositions of the clinker are 12.9% to 16.1% by weight of SiO2, 12% to 19% by weight of Al2O3, 1% to 3% by weight of Fe2O3, 49% to 54% by weight of CaO and 12% to 18.43% by weight of SO3. It is manufactured by calcining, at a temperature of 1300° C.±50° C. in a rotary kiln, the raw meal, comprising 33% to 62% by weight of limestone, 10.5% to 28% by weight of fly ash, and 19% to 45% by weight of FGD gypsum.
    Type: Grant
    Filed: January 9, 2015
    Date of Patent: November 21, 2017
    Assignee: Tangshan Polar Bear Building Materials Co., Ltd.
    Inventor: Zhenqiu Zhang
  • Patent number: 9714406
    Abstract: Aspects of the invention include methods of removing carbon dioxide (CO2) from a CO2 containing gas. In some instances, the methods include contacting CO2 containing gas with a bicarbonate buffered aqueous medium under conditions sufficient to produce a bicarbonate rich product. Where desired, the resultant bicarbonate rich product or a component thereof may then be stored or further processed, e.g., combined with a divalent alkaline earth metal cation, under conditions sufficient to produce a solid carbonate composition. Aspects of the invention further include systems for practicing the methods, as well as products produced by the methods.
    Type: Grant
    Filed: September 4, 2013
    Date of Patent: July 25, 2017
    Assignee: Blue Planet, Ltd.
    Inventors: Brent Richard Constantz, Mark Bewernitz, Jacob Schneider, Chris Camire
  • Patent number: 9409818
    Abstract: The present invention relates to a new sulfo-aluminate based clinker with a low belite content, a method for preparing this clinker, as well as the use of the clinker for preparing a hydraulic binder, and later on, grout, concrete or mortar.
    Type: Grant
    Filed: March 13, 2014
    Date of Patent: August 9, 2016
    Assignee: VICAT
    Inventors: Michel Pasquier, Laury Barnes-Davin, Pascal Meric, Guy Beauvent
  • Patent number: 9051216
    Abstract: Lithium compound functionalized carbonaceous materials are dispersed in a homogenous aqueous mixture. The mixture is dispersed in water used to mix cement and aggregate and remain dispersed in the cement. Spraying the aqueous mixture over cracked or damaged concrete surfaces fill the cracks or damages with the functionalized nanotubes. The solution solves problems of concrete permeability, eliminates alkali-silica reactions, avoids shrinkage and thermal stress and improves durability of concrete.
    Type: Grant
    Filed: April 21, 2011
    Date of Patent: June 9, 2015
    Assignee: Oceanit Laboratories, Inc.
    Inventors: Vinod P. Veedu, Venkat Kanavaram
  • Patent number: 9034099
    Abstract: The present invention relates to a novel cement which makes possible the preparation of concrete, grout or mortar which is resistant to internal sulfate reactions and to external sulfate attacks, and also the use of this cement for the preparation of concrete, grout or mortar.
    Type: Grant
    Filed: November 24, 2011
    Date of Patent: May 19, 2015
    Assignee: VICAT
    Inventors: Laetitia Bessette, Francois Hue, Martine Pasquier
  • Patent number: 9034098
    Abstract: A hydraulic binder includes, in parts by mass: (a) from 20 to 60 parts of Portland clinker; (b) from 20 to 40 parts of slag; and (c) from 0 to 60 parts of inorganic material other than the clinker and the slag; the sum of (a), (b) and (c) being equal to 100 parts; which binder further includes a slag activator including, relative to 100 parts of the sum of (a) and (b): from 1.4 to 6.55 parts of alkali metal salt, expressed as equivalent-Na2O; and from 1.1 to 11.0 parts of calcium sulfate, expressed as SO3.
    Type: Grant
    Filed: January 26, 2012
    Date of Patent: May 19, 2015
    Assignee: LAFARGE
    Inventors: Arnaud Schwartzentruber, Mylène Martin, Fabrice Pourcel
  • Patent number: 9028610
    Abstract: A process for the production of a hydraulic binder, includes co-grinding a clinker and 0.1 to 5% by dry mass relative to the mass of clinker, of a material including more than 15% by mass of calcium silicate hydrate relative to the solid fraction of the material.
    Type: Grant
    Filed: July 13, 2012
    Date of Patent: May 12, 2015
    Assignee: Lafarge
    Inventors: Xiaolin Pardal, Pascal Dion
  • Publication number: 20150107493
    Abstract: A shrinkage compensating concrete does not require restraint. The expansive forces developed during hydration compensate for concrete shrinkage, obviating the need for any added internal or external restraint element. Using this new shrinkage compensating concrete, substantially crack-free slabs may be built without using restraining steel bars, fibers, or other separate restraining element. The shrinkage compensating concrete includes a cement that develops internal expansive forces that never exceed the tensile strength of the concrete, such that the internal expansion compensates for the concrete shrinkage. The expansive cement may be an ASTMS, M or S cement, or other expansive cements may also be used.
    Type: Application
    Filed: December 29, 2014
    Publication date: April 23, 2015
    Inventor: Edward K. Rice
  • Patent number: 8992679
    Abstract: Dry construction pellets that may be made by mixing predetermined portions of two or more components of cementitious materials without ingredients that would allow the mixture to cure, and separating the un-curable mixture of the two or more components into a plurality of pellets, each having substantially the predetermined portions of the two or more components. An extrusion system may include a transport line configured to transport the dry pellets in a gaseous transport stream.
    Type: Grant
    Filed: February 5, 2010
    Date of Patent: March 31, 2015
    Assignee: University of Southern California
    Inventor: Behrokh Khoshnevis
  • Patent number: 8974596
    Abstract: A method of producing cement clinker including the steps of preheating raw meal comprising calcium carbonate in a preheating stage that is preheated by the exhaust gases of a sintering stage connected downstream in the direction of the gas flow, neutralizing the preheated raw meal, sintering the raw meal into cement clinker in a sintering stage, and cooling the cement clinker from the sintering stage in a cooling stage that cools the cement clinker with a gas. The exhaust gases of the sintering stage are combined with the exhaust gases of the neutralization, and the combined exhaust gases are conducted in an open gas circuit. The CO2 emissions are substantially reduced over known systems with CO separation, and the formation of nitrogen oxides by the combustion of atmospheric nitrogen in the oxidative environment of the sintering stage burner is almost completely prevented.
    Type: Grant
    Filed: August 12, 2010
    Date of Patent: March 10, 2015
    Assignee: KHD Humboldt Wedag GmbH
    Inventor: Robert Mathai
  • Patent number: 8876970
    Abstract: In the method according to the invention for producing cement clinker, raw cement meal is preheated in a preheater, the preheated raw cement meal is precalcined in a calciner and the precalcined raw cement meal is burnt in a kiln, fuel and combustion air having an oxygen content of at least 75 mol % being used in the calciner, and the raw cement meal being precalcined in a fluidised bed in the calciner. The exhaust gases occurring in the kiln are delivered to the preheater, bypassing the calciner, and the exhaust gases of the calciner are delivered to a CO2 preparation device.
    Type: Grant
    Filed: October 19, 2009
    Date of Patent: November 4, 2014
    Assignee: Polysius AG
    Inventor: Detlev Kupper
  • Patent number: 8864904
    Abstract: In a method for processing and utilizing bypass dust obtained during the production of cement, it is proceeded as a) contacting the bypass dust with an aqueous phase and mixing the same to obtain a homogenous slurry, with water-soluble components of the bypass dust being dissolved in the aqueous phase, b) carrying out a solid-liquid separation to separate the solids contained in the slurry so that a brine is remaining, c) separating heavy metals present in the brine and precipitating calcium as poorly soluble calcium salts, e.g. CaCO3, to obtain a processed brine, and d) subjecting the processed brine to a fractional crystallization.
    Type: Grant
    Filed: April 23, 2012
    Date of Patent: October 21, 2014
    Assignee: Holcim Technology Ltd
    Inventors: Ernst-Michael Sipple, Carlos Enrique Alzate Madero, Peter Szabados, Michal Vajansky, Viktor Svarc, Gerald Koglbauer
  • Patent number: 8864902
    Abstract: A cement clinker which can be sintered at 1,300 to 1,400° C. which is lower than the conventional sintering temperature and develops excellent strength characteristics such as mortar compression strength. The cement clinker has a total content of C3A and C4AF calculated by Bogue's formulas of 22 mass % or more, a C3S content calculated by Bogue's formula of 60 mass % or more and an iron modulus (I.M.) of 1.3 or less, preferably 1.0 to 1.3. Since the total content of C3A and C4AF is 22 mass % or more, the cement clinker can be sintered at a low temperature and the reduction of strength when a cement composition is cured can be prevented by reducing the iron modulus of the cement clinker.
    Type: Grant
    Filed: April 17, 2012
    Date of Patent: October 21, 2014
    Assignee: Tokuyama Corporation
    Inventors: Hiroshi Nagata, Akinori Nakamura, Hiroyoshi Kato, Takashi Chabayashi, Daihachi Kitayama
  • Publication number: 20140305346
    Abstract: The present invention teaches the method to use the sulfate or sulfites based raw materials, such as magnesium, calcium and other alkative earth sulfates or sulfites to produce the respective oxides in a carbon five basis, by using sulfur as the fuel and the reductant. The invention also utilizes renewable energy such as solar thermal or green electricity wherever possible. This approach provides a green process, of ultra-low carbon dioxide emission, for the production of magnesium, other alkaline earth metals and other material which requires alkaline earth oxide, such as in the production of carbon free Portland cement requiring lime. The invention also provides a useful outlet for waste streams leading to sustainable processes. The cost of the production of these precursors are kept low by concurrently producing a saleable by-product—sulfuric-acid.
    Type: Application
    Filed: April 15, 2013
    Publication date: October 16, 2014
    Inventor: Indra Neelameggham
  • Patent number: 8857118
    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: October 20, 2010
    Date of Patent: October 14, 2014
    Assignee: Calera Corporation
    Inventors: Brent R. Constantz, Cecily Ryan, Laurence Clodic
  • 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
  • Patent number: 8852339
    Abstract: The present invention relates to a process for the production of a clinker with a high content of belite, said process comprising the following steps: (i) introducing a raw meal into a calcination chamber of a cement plant kiln; (ii) calcining the raw meal at a temperature of from 1150° C. to 1375° C.; (iii) measuring the weight per liter of the product of step (ii) and eliminating the product having a weight per liter strictly less than 650 g/liter; (iv) measuring the quantity of SO3 in the product of step (ii) and eliminating the product having a ratio of quantity of SO3 of the decarbonated raw meal/quantity of SO3 in the product of step (ii) less than or equal to 0.75 and greater than or equal to 1.2; (v) measuring the quantity of free lime (CaOl) in the product of step (ii) and eliminating the product having a quantity of free lime strictly greater than 1.5%, percentage by mass of free lime in the product of step (ii).
    Type: Grant
    Filed: June 7, 2010
    Date of Patent: October 7, 2014
    Assignee: Lafarge
    Inventors: Gunther Walenta, Cédric Comparet, Vincent Morin
  • Patent number: 8641819
    Abstract: A cement composition, and a process for producing a cement composition, wherein the cement composition has the Sr content of 0.065 mass % to 1.0 mass % and the MgO content of greater than 1.0 mass % to 3.0 mass %. The process for producing a cement composition comprises a step (A) of adjusting the basic raw material units of raw materials selected from the group consisting of limestone, silica stone, coal ash, clay, blast furnace slag, soil generated by construction work, sewage sludge, hydrocake and iron sources so that the cement composition has the Sr content of 0.065 mass % to 1.0 mass % and the MgO content of greater than 1.0 mass % to 3.0 mass %, blending the adjusted raw materials and burning to produce cement clinker, and a step (B) of mixing the cement clinker with gypsum and an admixture of limestone and blast furnace slag followed by grinding.
    Type: Grant
    Filed: May 24, 2011
    Date of Patent: February 4, 2014
    Assignee: UBE Industries, Ltd.
    Inventors: Norihiko Sawabe, Hitoshi Tonokohchi, Takayasu Itoh, Hiroshi Mikami
  • 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: 8568528
    Abstract: The present invention relates to a novel iron-doped sulphoaluminate-belite clinker, a process for preparing this clinker, and also the use of the clinker for the preparation of hydraulic binder and, consequently, of grout, concrete or mortar.
    Type: Grant
    Filed: July 20, 2011
    Date of Patent: October 29, 2013
    Assignee: Vicat
    Inventors: Laury Barnes-Davin, Pascal Meric, Michel Pasquier, Guy Beauvent
  • Patent number: 8557039
    Abstract: The invention relates to a method for manufacturing a sulfoaluminous or belitic sulfoaluminous clinker from a raw mix formed from a mixture including minerals containing calcium, aluminum, silica, iron, and sulfur, preferably in sulfate form, and is characterized in that the method comprises the steps including: at least partially dehydrating and decarbonating the mixture through placement in a vertical kiln (1) comprising a substantially vertical chamber (2) wherein the mixture is heated, the chamber (2) of the vertical kiln (1) being supplied with hot gases the temperature of which is between 900 and 1150° C.
    Type: Grant
    Filed: March 12, 2009
    Date of Patent: October 15, 2013
    Assignee: VICAT
    Inventors: Yvan-Pierre Jacob, Jacques Croce, Guy Beauvent, René De La Fouchardiere, Dominique Renie
  • Patent number: 8529690
    Abstract: The present invention relates to a process of controlling crystal form of Alite in Portland cement clinker, wherein the said Portland cement clinker is thermally treated in order to change the crystal form of Alite in Portland cement clinker, so as to improve performance of resulting Portland cement clinker. The said process of present invention is easy and feasible.
    Type: Grant
    Filed: July 15, 2010
    Date of Patent: September 10, 2013
    Assignee: Nanjing University of Technology
    Inventors: Xiaodong Shen, Suhua Ma, Xuerun Li, Lin Chen, Weiqiang Zhou, Song Deng
  • Patent number: 8512551
    Abstract: The present disclosure provides methods and systems for coal liquefaction and obtaining a cement by-product. A method of obtaining a cement by-product of coal liquefaction may include exposing a coal to a hydrogenated vegetable oil in the presence of a coal-derived solvent to form a slurry, elevating the temperature of the slurry to facilitate liquefying the coal and liberating a volatile matter, separating the insoluble components from the slurry, heating the insoluble components to liberate a volatile matter and an entrained solvent, blending the insoluble components with a calcareous material and roasting the blend in a kiln at a temperature greater than 1000 degrees Celsius to obtain a clinker, and grinding the clinker to obtain a cement.
    Type: Grant
    Filed: June 22, 2011
    Date of Patent: August 20, 2013
    Assignee: West Virginia University
    Inventor: Alfred H. Stiller
  • Patent number: 8500902
    Abstract: A method of making cementitious particles using combustion synthesis is described. The method uses less energy and produces lower CO2 emissions than conventional processes. By controlling the process conditions, the morphology and the properties of the particles can be easily tuned for a variety of applications. A batch reactor and a continuous conveyor type reactor that can be used for the combustion synthesis with high viscosity raw materials are also described.
    Type: Grant
    Filed: May 27, 2010
    Date of Patent: August 6, 2013
    Inventors: Srinivas Kilambi, Krishnan Iyer, Karthik Gopalakrishnan, Ramesh Chembeti, Niraj Singh, Satish Reddy Dhumpala, Zijun Liu, Raman Kumar Gottumukkala, Subhadeep Mukherjee
  • Patent number: 8475587
    Abstract: Method of improving the product properties of clinker in the firing of raw meal in a clinker or cement furnace in which at least part of the fuels used are low-heating-value or alternative fuels, waste products containing organic substances or low-heating-value or alternative fuels are subjected to thermal dissociation and reaction of the dissociation products using radiant energy. The product gas or synthesis gas formed in this way is fed to the burners of the main firing facility to increase the flame temperature.
    Type: Grant
    Filed: December 18, 2008
    Date of Patent: July 2, 2013
    Assignee: Holcim Technology Ltd.
    Inventors: Albert Obrist, Peter Von Zedtwitz, Christian Wieckert
  • Patent number: 8460457
    Abstract: The present invention discloses compositions and methods wherein air entrained in cementitious materials at least one air-entraining cement additive is detrained using an ethoxylated, propoxylated fatty alcohol or alkylphenol having robustness for withstanding the harsh temperature and mechanical shearing effects of cement grinding mills. Exemplary air-entraining cement additives include a tertiary alkanolamine, a lignosulfonic acid or salt thereof, naphthalene sulfonate formaldehyde condensate, melamine sulfonate formaldehyde condensate, a glycol, a glycerin, or mixtures thereof.
    Type: Grant
    Filed: August 5, 2010
    Date of Patent: June 11, 2013
    Assignee: W. R. Grace & Co.-Conn.
    Inventor: Josephine Cheung
  • Patent number: 8404039
    Abstract: A method for secondarily synthesizing calcium sulphoaluminate mineral in Portland cement clinker is provided. The method includes adding gypsum into raw Portland cement, calcination, then heating twice to re-form calcium sulphoaluminate mineral that has decomposed at high temperature in the clinker. This method can increase the content of calcium sulphoaluminate mineral in the clinker. As a result, the advantages of the calcium sulphoaluminate mineral in the clinker may be obtained, such as improvement of the early stage performance and long-term performance of the cement clinker and increase in the quantity of mixture in the cement.
    Type: Grant
    Filed: July 15, 2010
    Date of Patent: March 26, 2013
    Assignee: Nanjing University of Technology
    Inventors: Xiaodong Shen, Suhua Ma, Xuerun Li, Lin Chen, Weiqiang Zhou, Song Deng
  • Patent number: 8393894
    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: September 26, 2011
    Date of Patent: March 12, 2013
    Assignee: Edw. C. Levy Co.
    Inventor: Ronald Robert Piniecki
  • Patent number: 8377198
    Abstract: A method and an apparatus for manufacturing of cement includes cement raw meal being preheated in a preheater, calcined in a calciner by contact with hot gases which are introduced into the calciner via a gas inlet and being diverted from the calciner via a gas outlet, and where calcined cement raw meal is diverted from the calciner, burned into cement clinker in a kiln and subsequently cooled in a clinker cooler. At least a portion of the calcined cement raw meal diverted from the calciner is heated further in a separate system to a temperature which exceeds the calcination temperature and is subsequently recirculated to the calciner. That at least a portion of the gases which are diverted via the gas outlet of the calciner is removed from the plant with a view to storage underground or other additional treatment.
    Type: Grant
    Filed: May 12, 2009
    Date of Patent: February 19, 2013
    Assignee: FLSmidth A/S
    Inventor: Klaus Hjuler
  • Publication number: 20130032061
    Abstract: The invention provides a system and method of thermally processing high carbon coal fly ash to produce hydraulically reactive or pozzolanic supplemental cementitious material (SCM) and synthesis gas. In this “ash to energy and cement” (ATEC) process, coal fly ash and ancillary fuels are fed into a thermal reactor along with oxide materials, such as limestone. Carbon in the ancillary fuel and in the coal fly ash is converted to synthesis gas that is combusted to generate steam or electricity. The remaining low-carbon ash and bed material exits the thermal reactor chamber and is further processed at high temperature in a kiln or slagging unit to produce partially fused nodules or clinker. The nodules or clinker are cooled and ground to a desired fineness for use as a cementitious materials. The ATEC process effectively converts high carbon coal fly ash waste to energy and value added SCM.
    Type: Application
    Filed: October 28, 2010
    Publication date: February 7, 2013
    Inventors: Bary Wilson, Brandon Ruf Wilson
  • Publication number: 20120255733
    Abstract: A process for sealing or strengthening porous molded articles, rock or porous informations. The process comprises using hyper-fine cement having a particle size D50 of <1 ?m as at least one of a sealing agent and strengthening agent.
    Type: Application
    Filed: June 18, 2012
    Publication date: October 11, 2012
    Applicant: EPG (ENGINEERED NANOPRODUCTS GERMANY) AG
    Inventors: Luis GENOLET, Helmut SCHMIDT
  • Patent number: 8252109
    Abstract: A process for the production of cement which includes the calcination of calcium carbonate-containing raw meal in a calciner heated by combustion of a carbon-containing fuel with a gas including oxygen and from 0 to 80% by volume of carbon dioxide, and substantially free of nitrogen, and isolating the gas produced by combustion and calcination in the calciner.
    Type: Grant
    Filed: October 30, 2007
    Date of Patent: August 28, 2012
    Assignee: Lafarge
    Inventors: Colin Paxton, Michael Weichinger
  • Publication number: 20120196046
    Abstract: Process for the preparation of a sprayable hydraulic binder composition containing as main components water, aggregates, hydraulic binder, set accelerator, characterized in, that a calcium silicate hydrate (C—S—H) containing component is added before and/or at the spray nozzle.
    Type: Application
    Filed: August 31, 2010
    Publication date: August 2, 2012
    Inventors: Luc Nicoleau, Montserrat Alfonso, Elena Kolomiets
  • Publication number: 20120145046
    Abstract: Engineered cements are described that include an engineered clinker fraction designed for use with one or more supplementary cementitious material (“SCM”) fractions. The engineered clinker fraction has a narrow particle size distribution (“PSD”) with a relatively high tricalcium silicate (“C3S”) content as compared to traditional ordinary Portland cement (“OPC”). The high C3S content and narrow PSD provide desired reactivity and set time when combined with the one or more SCMs. The clinker fraction may be combined with one or more ultrafine SCM fractions and/or one or more coarser SCM fractions to achieve a desired wide particle size distribution. By engineering the chemistry and the particle size of the clinker fraction and the SCM fraction to work together, the engineered cements can have superior packing density, water demand, reactivity, set time, sulfate resistance, and strength development as compared to conventional OPC-SCM blends.
    Type: Application
    Filed: November 30, 2011
    Publication date: June 14, 2012
    Inventors: Andrew S. Hansen, John M. Guynn
  • Publication number: 20120132112
    Abstract: A method for producing cement clinker in a plant that includes: a first cyclone preheater and a second cyclone preheater for preheating first and second portions of a raw material, respectively; a precalcinator using a combustion gas for burning a fuel, the fumes released by the precalcinator being directed to the second cyclone preheater; a rotary furnace provided with a fuel burner, the fumes released by the rotary furnace being directed to the first cyclone preheater; and a clinker cooler that blows cooling air across the clinker at the outlet of the rotary furnace. According to the method, the precalcinator combustion gas contains between 90 and 100 vol % of oxygen. The precalcinator may consist of a fluidized bed, the fluidization gas being the combustion gas. The invention also relates to a plant as such.
    Type: Application
    Filed: June 30, 2010
    Publication date: May 31, 2012
    Applicant: FIVES FCB
    Inventor: Sebastien Devroe
  • Patent number: 8163082
    Abstract: Manufacturing methods and plants for carrying out methods of manufacturing cement clinker including diverting gases from a separation cyclone for a calcined cement material. The diverted gases are cooled to a temperature of 850° C. or less by introducing raw cement materials into the diverted gas stream.
    Type: Grant
    Filed: March 21, 2007
    Date of Patent: April 24, 2012
    Assignee: Flsmidth A/S
    Inventor: Jens Peter Hansen
  • Publication number: 20120032107
    Abstract: A concrete mixture for forming a breathable concrete. The mixture comprises aggregate particles and a paste comprising water, cement or cement substitute, and plasticiser. The plasticiser controls the viscosity of the paste such that the paste forms a substantially uniform layer coating the particles, with the coated particles in contact, whilst allowing spaces to be retained there between. These spaces interconnect forming channels through the concrete, allowing air to permeate there through such that the concrete exhibits good dynamic insulation properties, whist retaining structural strength.
    Type: Application
    Filed: June 23, 2009
    Publication date: February 9, 2012
    Inventors: Mohammed Imbabi, Fredrik Glasser, Jim Min Wong
  • 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
  • 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: 8021479
    Abstract: The invention relates to a device and a method for producing clinker from raw cement material. The raw cement material is preheated in a preheater, is precalcined in a calcining apparatus, is completely burned in a sintering furnace, and is finally cooled in a cooler. Tertiary air of the cooler is fed to the calcining apparatus while eliminated dust is thermally treated in a dust burning reactor with the aid of combustion air and fuel. At least some of the tertiary air is fed to the dust burning reactor as combustion air while the dust that is to be treated and the combustion air penetrate the dust burning reactor in the same direction of flow.
    Type: Grant
    Filed: August 25, 2006
    Date of Patent: September 20, 2011
    Assignee: Polysius AG
    Inventors: Markus Mohr, Christoph Beyer
  • Patent number: 8021478
    Abstract: A process for producing Portland cement clinker at low temperatures fixing the sulfur produced by burning high sulfur content coke fuel. The invention also describes a Portland cement clinker that includes new additional phases.
    Type: Grant
    Filed: July 8, 2005
    Date of Patent: September 20, 2011
    Assignee: Cemex Trademarks WorldWide Ltd.
    Inventors: Homero Ramirez Tobías, Carlos Enrique Castillo Linton
  • Patent number: 7998270
    Abstract: A cement clinker which necessitates no considerable change in the main chemical components and mineral components of cement, is free from preheater coating problems and adverse influences on cement properties, and is effective in reducing the heat quantity required for burning; and a process for producing the cement clinker. In the process for cement clinker production a substance having a melting point higher than the temperature of a liquid phase of the cement clinker and serving as crystal nuclei for C3S is incorporated include a fine powder of refractory brick, particles of an ordinary Portland cement clinker, a fine powder of a high-early-strength Portland cement clinker, a high-early-strength Portland cement, and a fine powder of quicklime. Due to this, alite generation is accelerated even at a low temperature. As a result, high-quality clinker can be produced through burning using a small unit heat quantity and no decrease in cement quality results.
    Type: Grant
    Filed: December 2, 2005
    Date of Patent: August 16, 2011
    Assignee: Mitsubishi Materials Corporation
    Inventors: Etsuro Asakura, Kenichi Shimosaka, Makio Yamashita, Ryuichi Komatsu
  • Patent number: 7976627
    Abstract: The invention relates to a method and to apparatus for the production of a hydraulic binding agent from a plurality of raw material components (12a to 12e), wherein the raw material components are ground to a raw meal, the raw meal is burned to clinker in a combustion plant (2) and finally the clinker is ground together with further inter-grinding materials. Moreover, the mineralogical and/or chemical composition of the raw meal and/or the clinker is analyzed, at least two separate raw meal silos/clinker silos (4a to 4h, 5a to 5g) are provided in each case for the raw meal and/or the clinker and are filled with raw meal/clinker of different mineralogical and/or chemical composition. Furthermore the composition of the raw meal to be burned and/or of the clinker to be ground is fixed by controlled extraction as a function of the analysed composition of the raw meal/clinker from one or a plurality of raw meal silos/clinker silos.
    Type: Grant
    Filed: September 16, 2004
    Date of Patent: July 12, 2011
    Assignee: Polysius AG
    Inventors: Ralf Bernard Westmattelmann, Michael Enders
  • Patent number: 7976628
    Abstract: A process of manufacturing cement clinker is provided in which a clean supply of CO2 gas may be captured. The process also involves using an open loop conversion of CaO/MgO from a calciner to capture CO2 from combustion flue gases thereby forming CaCO3/CaMg(CO3)2. The CaCO3/CaMg(CO3)2 is then returned to the calciner where CO2 gas is evolved. The evolved CO2 gas, along with other evolved CO2 gases from the calciner are removed from the calciner. The reactants (CaO/MgO) are feed to a high temperature calciner for control of the clinker production composition.
    Type: Grant
    Filed: June 19, 2009
    Date of Patent: July 12, 2011
    Assignees: Savannah River Nuclear Solutions, LLC, Clemson University
    Inventors: Gerald C. Blount, Ronald W. Falta, Alvin A. Siddall
  • Patent number: 7972419
    Abstract: Disclosed is a method for reducing emissions from exhaust gas generated during the grinding and drying of cement raw meal as part of a cement manufacturing process. The invention comprises circuiting the exhaust gas between a raw mill and a clinker cooler. In the clinker cooler at least a portion of said emissions are delivered to a cement kiln in which said emissions are removed by being combusted and/or absorbed.
    Type: Grant
    Filed: August 7, 2008
    Date of Patent: July 5, 2011
    Assignee: FLSmidth A/S
    Inventors: Ove L. Jepsen, Steven Miller, Anthony Shave
  • Patent number: 7922779
    Abstract: The invention herein provides for an improved dye material composed of a concentrated dye element for mixture with an aqueous element prior to application.
    Type: Grant
    Filed: June 11, 2007
    Date of Patent: April 12, 2011
    Assignee: American Decorative Concrete Supply Company, Inc.
    Inventor: Clint Howle
  • Publication number: 20110067603
    Abstract: Provided herein are compositions and methods including hydraulic cement, supplementary cementitious material, and/or self-cementing material. Methods for making the compositions and using the compositions are provided.
    Type: Application
    Filed: August 16, 2010
    Publication date: March 24, 2011
    Inventors: Brent R. Constantz, Kasra Farsad, Chris Camire, Joshua Patterson, Miguel Fernandez, Karin Yaccato, Ryan Thatcher, John Stagnaro, Irvin Chen, Sidney Omelon, Keith Hodson, Laurence Clodic, Katharine Geramita, Terence C. Holland
  • Publication number: 20110067600
    Abstract: Provided herein are compositions and methods including hydraulic cement, supplementary cementitious material, and/or self-cementing material. Methods for making the compositions and using the compositions are provided.
    Type: Application
    Filed: August 16, 2010
    Publication date: March 24, 2011
    Inventors: Brent R. Constantz, Kasra Farsad, Chris Camire, Irvin Chen