子分类：
| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 141 | Burnt Product | US11908132 | 2006-03-08 | US20080308012A1 | 2008-12-18 | Takayoshi Okamura; Masahiko Moriya; Satoshi Yamazaki; Kota Sasaki; Makoto Kobayakawa; Kenichi Honma |
| A burnt product is produced by burning a raw material containing chromium, in which the fine-grained portion is removed. Even in the burnt product produced from a raw material containing chromium, the chromium (VI) content is reduced. | ||||||
| 142 | High Belite-Containing Sulfoaluminous Clinker, Method for the Production and the Use Thereof for Preparing Hydraulic Binders | US11658042 | 2005-07-19 | US20070266903A1 | 2007-11-22 | Ellis Gartner; Guanshu Li |
| The present invention concerns a belite-rich sulphoaluminous clinker, a method for producing such a clinker and its use for preparing hydraulic binders, and comprising as a mineralogical formulation: 5 to 25%, preferably 10 to 20%, of a calcium aluminoferrite phase with a formulation corresponding to the general formula C2AXF(1−X), with X comprised between 0.2 and 0.8. 15 to 35%, preferably 20 to 30%, of a calcium sulphoaluminate phase “yee' limit” (C4A3$), 40 to 75%, preferably 45 to 65% belite (C2S), from 0.01 to 10% of one or several minor phases selected from calcium sulphates, alkaline sulphates, perovskite, calcium aluminates, gehlenite, free limestone and periclase, and/or a vitreous phase, and at least one or several secondary elements selected from sulphur, magnesium, sodium, potassium, boron, phosphorus, zinc, manganese, titanium, fluorine, chlorine, the total content of these secondary elements being less than or equal to 15%. | ||||||
| 143 | Mid-kiln injection of waste-derived materials | US11324851 | 2006-01-04 | US20060107875A1 | 2006-05-25 | Lawrence Hoffis |
| 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. | ||||||
| 144 | Recovery of cement kiln dust through precipitation of calcium sulfate using sulfuric acid solution | US10207316 | 2002-09-26 | US06613141B2 | 2003-09-02 | Jerry F. Key, Jr. |
| A method and apparatus for recovering calcium sulfate di-hydrate (gypsum) from a precipitation reaction between cement kiln dust and commercial, spent or waste grade sulfuric acid solution. The gypsum recovered from this process acts as a necessary functional additive for use in the production of hydraulic Portland cement. The invention advantageously provides for a method of producing a fertilizer as a byproduct of the gypsum production process. The invention also provides a method of producing Portland cement using the gypsum derived from the cement kiln dust. | ||||||
| 145 | Cement clinker, cement composition, method for producing cement clinker, and method for treatment of waste containing alkali component | US09958417 | 2001-10-08 | US06537365B2 | 2003-03-25 | Tatsuo Ikabata; Tatsushi Akiyama; Kazuhiro Kano |
| Cement clinker, characterized in that it comprises Al2O3 and Fe2O3 wherein the mass ratio of Al2O3/Fe2O3 is 0.05-0.62, and alkali components and C2S wherein the content Y (mass %) of alkali components and the content X (mass %) of C2S satisfy the formula: 0.0025X+0.1≦Y≦0.01X+0.8. The production of the clinker allows the incorporation of alkali components into cement with an advantageous effect of enhancement of the hydration of belite and also with suppression of the lowering of flowability, which leads to the reuse of wastes containing alkali components as a cement raw material. | ||||||
| 146 | Cement clinker, cement composition, method for producing cement clinker and method for treatment of waste containing alkali component | US09958417 | 2001-10-08 | US20030010257A1 | 2003-01-16 | Tatsuo Ikabata; Tatsushi Akiyama; Kazuhiro Kano |
| Cement clinker, characterized in that it comprises Al2O3 and Fe2O3 wherein the mass ratio of Al2O3/Fe2O3 is 0.05-0.62, and alkali components and C2S wherein the content Y (mass %) of alkali components and the content X (mass %) of C2S satisfy the formula: 0.0025Xnull0.1nullYnull0.01Xnull0.8. The production of the clinker allows the incorporation of alkali components into cement with an advantageous effect of enhancement of the hydration of belite and also with suppression of the lowering of flowability, which leads to the reuse of wastes containing alkali components as a cement raw material. | ||||||
| 147 | Method of operating multi-industry integrated complex for basic industrial plants | US09978021 | 2001-10-17 | US20020047230A1 | 2002-04-25 | Tsuyoshi Okada; Ko Noguchi; Yuji Hatano; Takuro Yagi; Akira Sakurai; Fukuzo Todo; Norimitsu Kurumada; Kazuo Tamura; Katsuji Mukai; Hideichiro Takashima |
| A method of operating a basic industrial plant complex efficiently utilizing energy, products, byproducts, and waste materials between the basic industrial plants as a whole to totally improve energy efficiency and contribute to energy saving. The basic industrial plant complex comprises basic industrial plants including an oil refining plant, an oil-fired power plant, a cement plant, a steelmaking plant constructed so as to be in close proximity to or adjacent to each other. The basic industrial plants are combined through a transporter for partially or completely supplying product, byproduct or waste material from a plant in the complex as a fuel, power source, and/or raw material to products for another plant in the complex. | ||||||
| 148 | Process for converting well drill cuttings into raw materials for the production of cement, and cement compositions obtained therefrom | US09424391 | 1999-11-24 | US06361596B1 | 2002-03-26 | Cesar Anatolio Carcia Vidrio; Denzil Cotera Vazquez; Jorge Enrique Hernandez de la Rosa |
| This process for converting well drill cuttings into raw materials for the production of cement includes the steps of extracting limestone and clay, crushing and prehomogenizing the extracted materials, raw grinding and adjusting the composition by adding correctives, producing clinker in rotary kiln and cement grinding. Water based drill cutting sludge is introduced in the crushing and prehomogenizing step and oil-based drill cutting sludge is fed into the rotary kiln. | ||||||
| 149 | Recovering chloride and sulfate compounds from spent potliner | US09201195 | 1998-11-30 | US06231822B1 | 2001-05-15 | Robert J. Barnett; Michael B. Mezner |
| A method of recovering chloride and sulfate salts from spent potliner using acid digestion. | ||||||
| 150 | Treatment of phosphatic wastes | US09250151 | 1999-02-16 | US06231767B1 | 2001-05-15 | David Krofchak; Roberto Berardi |
| A process for treating thickened phosphatic clay suspensions, waste clay and phosphogypsum produced in the processing of phosphate ore by water beneficiation and chemical processing, the thickened phosphatic clay suspension having a solid content of from about 4 to about 40 percent by weight, includes mixing a sufficient amount of deflocculating agent with a thickened phosphatic clay suspension to cause deflocculation of the suspension to an extent sufficient to reduce the viscosity thereof to a value enabling the deflocculated suspension to be readily pumped from one location to another, the deflocculating agent comprising an alkali compound of a phosphorus oxide. The deflocculated suspension of reduced viscosity is pumped from one location to another and separated into a clay suspension and a phosphatic mineral and sand suspension. The non-clay minerals are dissolved in the phosphatic mineral and sand suspension in dilute sulfuric acid to separate a phosphatic fraction as phosphoric acid from a sand fraction. A cementitious material is produced by heating clay, phosphogypsum and sand in a kiln, and the cementitious material is mixed with the clay suspension and the sand fraction in an amount sufficient to cause the formation of large silicate molecules with resultant gelling and setting of the suspensions into an inert solid material. | ||||||
| 151 | Production of fumed silica | US09374546 | 1999-08-13 | US06217840B1 | 2001-04-17 | Robert J. Barnett; Michael B. Mezner |
| A method for producing fumed silica and a fluorine-containing product from a source of silica in solid form and a solid material containing fluorine, the solid material selected from the group consisting of sodium aluminum tetrafluoride, cryolite, aluminum fluosilicate ammonium bifluoride, sodium aluminum silicofluoride, and sodium fluosilicate. The method comprises the steps of digesting the silica in solid form and the solid material selected from the group consisting of sodium aluminum tetrafluoride, cryolite, aluminum fluosilicate, ammonium bifluoride, sodium aluminum silicofluoride, and sodium flurosilicate in a sulfuric acid digester. The digestion step produces a first gas component comprised of silicon tetrafluoride, hydrogen fluoride and water vapor. The first gas component is removed from the digester. The gas component recovered from the digester is heated to a temperature sufficiently high to convert the silicon tetrafluoride to fumed silica in the presence of the hydrogen fluoride and the finned silica is separated from the hydrogen fluoride. | ||||||
| 152 | Recovering carbon, silica and alumina from spent potliner | US09201196 | 1998-11-30 | US06217836B1 | 2001-04-17 | Robert J. Barnett; Michael B. Mezner |
| Spent potliner from aluminum reduction cells is treated, for example, with sulfuric acid to recover carbon, silica and alumina or to recover a vitrified product of silca and alumina. | ||||||
| 153 | Method of recovering fumed silica from spent potliner | US09298087 | 1999-04-22 | US06193944B1 | 2001-02-27 | Robert J. Barnett; Michael B. Mezner |
| Spent potliner from an aluminum reduction cell is subject to an acid digest and the digest may be adjusted to produce a first gas component comprised of at least one material selected from the group consisting of silicon tetrafluoride, hydrogen fluoride, hydrogen cyanide gas and water vapor, and a slurry component comprised of at least one material selected from the group consisting of carbon, silica, alumina, and sodium, iron, calcium and magnesium compounds. The first gas component is removed from the digester and heated to a temperature sufficiently high to convert said silicon tetrafluoride to fumed silica and hydrogen fluoride. Thereafter, the fumed silica is separated from the hydrogen fluoride to recover fumed silica from spent potliner material. | ||||||
| 154 | Process for treating a waste material resulting from an oil recovery from tar sands process | US744720 | 1996-10-29 | US5846314A | 1998-12-08 | Christopher Robin Langdon Golley |
| A method of treating a dilute aqueous suspension of solid particulate material comprising waste material from a process for recovering petroleum from oil sand includes diluting the suspension with at least 75% of its own volume of water thereby to increase the settling rate of the particulate material and allowing the particulate material to settle to form a concentrated solid sediment. The treated suspension may have been obtained from a process in which an alkaline solution is used to treat the oil sand. The water from which the concentrated solid sediment is separated may be returned to the process for recovering petroleum from oil sand. The solid sediment may be transferred to a separation vessel in which it is fractionated into a coarse particle fraction and a fine particle fraction. The fine particle fraction may comprise essentially particles having an equivalent spherical diameter not greater than 3 .mu.m. The concentrated solid material recovered may be calcined to form a pozzolanic material. | ||||||
| 155 | Process for preparing enviromentally stable products by the remediation of contaminated sediments and soils | US772780 | 1996-12-24 | US5803894A | 1998-09-08 | Richard L. Kao; Sarabjit S. Randhava; Surjit S. Randhava; Michael C. Mensinger; Amirali G. Rehmat; Anthony L. Lee |
| This invention relates to thermo-chemical remediation and decontamination of sediments and soils contaminated with organic contaminants as well as inorganic materials with subsequent beneficial reuse. Novel environmentally stable products of commercial value are produced when certain additives such as calcium and metal oxides are mixed with the contaminated materials. In the process, the mixture is heated to 1150.degree. C..about.1500.degree. C. to produce a molten reaction product with at least part of an excess amount of oxygen mixture or air is continuously bubbled through the melt in order to provide mixing and achieve high thermal destruction and removal efficiencies of the organic contaminants. The melt is then quickly quenched in moist air, steam, or water to avoid the transformation of the amorphous material into crystals. The inorganic contaminants such as chromium, nickel, zinc, etc. are incorporated and completely immobilized within the amorphous silicate network. The amorphous material can be pulverized to yield a powder which evinces cementitious properties either by reaction with alkali solution or by blending it with other materials to produce blended cements. The compressive strengths of the concretes made from the powder of the subject invention and blends thereof are comparable to, or greater than the ASTM requirements for general purpose concrete applications. The powder of the subject invention, blended cements, and concrete/mortar derived therefrom also easily pass the EPA TCLP leach test to achieve environmental acceptability. | ||||||
| 156 | Process for producing cement and elemental sulfur from a flue gas desulfurization waste product | US901457 | 1997-07-28 | US5769940A | 1998-06-23 | John W. College |
| Cement and elemental sulfur are produced by forming a moist mixture of a flue gas desulfurization process waste product containing 80-95 percent by weight calcium sulfate hemihydrate and 5-20 percent by weight calcium sulfate hemihydrate, aluminum, iron, silica and carbon, agglomerating the moist mixture while drying the same to form a feedstock, and calcining the dry agglomerated feedstock in a rotary kiln. Sulfur dioxide produced during the calcination is cooled and contacted with hydrogen and carbon monoxide to reduce the same to elemental sulfur. | ||||||
| 157 | Mercury contaminated mud treatment | US052655 | 1993-04-26 | US5314527A | 1994-05-24 | Michael A. Rockandel; Larry G. Twidwell |
| This invention relates to a hydrometallurgical process for the treatment of mercury contaminated muds. More particularly, this process pertains to a hydrometallurgical process for the treatment of Environmental Protection Agency designated K106 muds discharged from a mercury chlor-alkali plant. A hydrometallurgical process for the treatment of mercury containing solids comprising: (a) treating the solids in a first leach with acid and sodium hypochlorite to produce a leached product; (b) transferring the product from the first leach to a first washing thickener and thickening the leached product from the first leach; (c) transferring the underflow from the wash thickener to a second leach and treating the underflow product with acid and sodium hypochlorite to yield a second leached product; (d) transferring the product from the second leach to a second washing thickener and thickening the leached product from the second leach; and (e) transferring the product from the second wash thickener to a final dewatering process to yield a low mercury content. | ||||||
| 158 | Method for fixing blast/cleaning waste | US750959 | 1991-08-28 | US5266122A | 1993-11-30 | D. J. Rapp; Redmond R. Clark; Michael McGrew |
| A method for blast cleaning metal and fixing the hazardous waste generated by blast cleaning. An abrasive cement in a sufficient amount is combined with the blast cleaning process, thereby reducing the leachability of the heavy metals and producing non-hazardous abrasive waste. | ||||||
| 159 | Method for the disposal of aqueous sewage sludge | US918935 | 1992-07-22 | US5217624A | 1993-06-08 | Isao Yamane; Toru Saito; Masao Shimoda; Satoshi Kouchi |
| A combination of a dehydration process for dehydrating sewage sludge by mixing a quicklime-containing material with the sludge, a cement conversion process for introducing the solids produced by the dehydration process into a cement kiln with other cement raw materials to yield cement, and a gas treatment process for introducing gases generated in the dehydration process into a cement burning process, thereby enabling conversion of the sewage sludge into cement without releasing wastes, with a reduction in fuel consumption for the cement burning, and a reduction in NOx content of the exhaust gas. | ||||||
| 160 | Hydrometallurgical process for treating mercury contaminated muds | US875100 | 1992-04-28 | US5209774A | 1993-05-11 | Michael A. Rockandel; Larry G. Twidwell |
| This invention relates to a hydrometallurgical process for the treatment of mercury contaminated muds. More particularly, this process pertains to a hydrometallurgical process for the treatment of Environmental Protection Agency designated K106 muds discharged from a mercury chlor-alkali plant. A hydrometallurgical process for the treatment of mercury containing solids comprising: (a) treating the solids in a first leach with acid and sodium hypochlorite to produce a leached product; (b) transferring the product from the first leach to a first washing thickener and thickening the leached product from the first leach; (c) transferring the underflow from the wash thickener to a second leach and treating the underflow product with acid and sodium hypochlorite to yield a second leached product; (d) transferring the product from the second leach to a second washing thickener and thickening the leached product from the second leach; and (e) transferring the product from the second wash thickener to a final dewatering process to yield a low mercury content. | ||||||
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