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| Number | Title | Issue Date |
| 7294193 | Cementitious materials including slag and geopolymers Cementitious materials including slag and geopolymer can be added to conventional cement compositions, such as Portland cement, as a partial or total replacement for conventional cement materials. The slag may comprise silicates and/or oxides of calcium, silicon, ma... | 11/13/2007 |
| 7160384 | Amine-containing cement processing additives An exemplary method of the invention comprises introducing into a grinding mill, wherein cement clinker is ground to provide cement powder, a diamine such as tetrahydroxylethylethylene diamine, and an alkanolamine such as triethanolamine or triisopropanolamine. The ... | 01/09/2007 |
| 7008606 | Process for passivating sulfidic iron-containing rock A method is provided for passivating sulfidic iron-containing rock comprising contacting sulfidic iron-containing rock with one or more members of the group consisting of magnesium oxide, magnesium hydroxide, magnesium chloride, magnesium nitrate and magnesium carbo... | 03/07/2006 |
| 6896722 | Zinc dust containing slurry and waterborne coating material A zinc dust containing slurry is prepared by mixing 7.8 weight percent of a solution of a sodium silicate. 72.0 weight percent of the demineralized water, 0.2 weight percent of a surface active agent and 20 weight percent of zinc dust. A waterborne coating material ... | 05/24/2005 |
| 6840981 | Method of producing reduced iron and production facilities therefor A method of producing reduced iron pellets including reducing raw material pellets to obtain reduced iron pellets, and rolling the reduced iron pellets at a temperature ranging between 800 and 1200° C. sufficiently such that the reduced iron pellets undergo sinteri... | 01/11/2005 |
| 6773471 | Low sulfur coal additive for improved furnace operation The present invention is directed to additives for coal-fired furnaces, particularly furnaces using a layer of slag to capture coal particles for combustion. The additive(s) include iron, mineralizer(s), handling aid(s), flow aid(s), and/or abrasive material(s). The... | 08/10/2004 |
| 6676725 | Cold bonded iron particulate pellets Shaped bodies containing particulate iron materials, such as cast pellets, briquettes and the like, with sufficient strength to withstand temperatures of up to at least 1000° C. can be obtained by using a fully hydrated high-alumina cement as the binder.... | 01/13/2004 |
| 6605130 | Pellets incorporated with carbonaceous material Pellets incorporated with a carbonaceous material of the present invention contain a carbonaceous material and iron ore mainly composed of iron oxide. The maximum fluidity of the carbonaceous material in softening and melting, and the ratio of iron oxide ... | 08/12/2003 |
| 6527975 | Mineral oxide liquid concentrates for water and wastewater treatment A process for making a mineral oxide concentrate useful as a flocculent, coagulant and/or disinfectant for the treatment of water and wastewater comprises extracting minerals from a natural mineral deposit rich in aluminum, magnesium, potassium and iron; ... | 03/04/2003 |
| 6334885 | Method of solidifying steel-making slag and material produced by the method A method of solidifying a steel-making slag is performed by subjecting a mixture of a steel-making slag containing at least about 50% by weight of a powdery steel-making slag having a particle size not greater than about 5 mm and a substance containing at... | 01/01/2002 |
| 6334883 | Pellets incorporated with carbonaceous material and method of producing reduced iron Pellets incorporated with a carbonaceous material of the present invention contain a carbonaceous material and iron ore mainly composed of iron oxide. The maximum fluidity of the carbonaceous material in softening and melting, and the ratio of iron oxide ... | 01/01/2002 |
| 6312501 | Method of producing reduced iron and production facilities therefor A method of producing raw material pellets, including forming pellets from a mixture of an iron oxide powder, a coal powder and a binder material after adding adjusting water to the mixture, and drying the pellets, wherein the binder material comprises at... | 11/06/2001 |
| 6280497 | Cored wire for treating molten metal and method of manufacture A cored wire continuously formed by continuously inserting an extruded core inside a continuously roll formed sheath, the peripheral edges of the roll formed sheath joined by a continuous lock seam. Inspection of the partially formed lock seam at a design... | 08/28/2001 |
| 6221129 | Process for preparing flux suitable for soldering light metals such as aluminum A flux which contains irreversibly dehydrated K2 AlF5, for soldering light metal materials, in particular aluminum. The flux has the advantages of forming a very uniform flux coating on the workpiece or workpieces to be soldered and ... | 04/24/2001 |
| 6168072 | Expansion agent assisted diffusion bonding The present invention provides a method of diffusion bonding a first article containing a thermally activated expansion agent to a second article. The first article and the second article are placed adjacent to each other at a bonding area. The first arti... | 01/02/2001 |
| 6053960 | Method of manufacture of cored wire for treating molten metal A cored wire continuously formed by continuously inserting an extruded core inside a continuously roll formed sheath, the peripheral edges of the roll formed sheath joined by a continuous lock seam. Inspection of the partially formed lock seam at a design... | 04/25/2000 |
| 5997610 | Amphiphilic compounds with at least two hydrophilic and at least two hydrophobic groups based on dicarboxylic acid diamides The invention concerns amphiphilic compounds of general formula (I) ##STR1## with at least two hydrophilic and at least two hydrophobic groups based on diacarboxylic acid diamides. The amphiphilic compounds according to the invention are mostly surfa... | 12/07/1999 |
| 5977224 | Roll press grinding aid for granulated blast furnace slag A grinding aid and an enhanced roll press method of grinding granulated blast-furnace slag by treating the slag feed of the roll press with from about 0.002 to 0.2 weight percent of polyacrylic acid or its alkali metal salt in combination with up to about... | 11/02/1999 |
| 5935296 | Bonded medium Thermally shock stable bonded solid materials are formed by mixing a solid mineral or inorganic material in an aqueous medium with a lignosulfonate, treating the aqueous medium with a metal ion- based complexing agent (such as lime), with application of h... | 08/10/1999 |
| 5925165 | Process and apparatus for the 3-stage treatment of solid residues from refuse incineration plants In a method for processing solid residues from refuse incineration plants the slag is melted and heavy metals from the melt (16) are separated for reutilization. The slag is directly transferred from the refuse incineration plant into a first heating cham... | 07/20/1999 |
| 5849172 | Copper solvent extraction and electrowinning process An improved method and apparatus is provided for the production of copper using a solvent extraction electrowinning process. Process streams formed during the process containing entrained liquids are fed to a cyclone to remove either organic extractant or... | 12/15/1998 |
| 5803949 | Fluidized bed roasting process A method of stabilizing a fluidized bed in a fluidized bed roasting process for metal sulphide concentrate comprises the step of controlling the particle size distribution of the particulate material in the bed so that a minimum amount of no less than abo... | 09/08/1998 |
| 5785737 | Method for recycling iron bearing sludges in a steelmaking operation The invention is directed to a process for dehydrating wet BOF scrubber sludge to produce a steelmaking revert having an improved flow rate when handled in a recycle stream. Wet sludge is combined with hot BOF slag to provide a slag/sludge mixture. The we... | 07/28/1998 |
| 5720796 | Process of using roll press grinding aid for granulated blast furnace slag A grinding aid and an enhanced roll press method of grinding granulated blast-furnace slag by treating the slag feed of the roll press with from about 0.002 to 0.2 weight percent of polyacrylic acid or its alkali metal salt in combination with up to about... | 02/24/1998 |
| 5505903 | Method of producing cold-moulded iron-containing briquettes In the manufacture of cold-moulded briquettes from iron-containing waste metallurgical material mixed with a binder, in order to obtain high-strength briquettes and almost complete reducibility, magnetite waste metallurgical material such as scale (1) is ... | 04/09/1996 |
| 5421858 | Ore feed heating An improved method of extracting minerals from ore is described. The method is applicable to vat leaching operations and may also be useful in heap leaching operations. The method involves the pre-heating of comminuted ore prior to the agglomeration phase... | 06/06/1995 |
| 5421859 | Processes of continuously making hard composites of coke and carbon-reducible oxides for smelting to iron, ferroalloys and silicon Composite pieces of high density and strength are made continuously from mixtures of fine particles of bituminous or subbituminous or lignite coals and particles of carbon reducible oxides. The particles are mixed with water, compressed to squeeze out som... | 06/06/1995 |
| 5407464 | Ultrafine comminution of mineral and organic powders with the aid of metal-carbide microspheres The present invention relates to ultrafine comminution of mineral and organic powders with the aid of ball-milling techniques employing, as the grinding medium, solid (nonporous) metal-carbide microspheres with diameters of from 10 to 100 μm fabricated w... | 04/18/1995 |
| 5382279 | Method and apparatus for combustion of steel plant wastes A process for consuming oily sludge waste product in steel making operations includes spraying a waste slurry onto the moving porous bed of a sinter strand. A burner hood is spaced above a portion of the moving bed. The bed carries a sinter mix which is i... | 01/17/1995 |
| 5364446 | Heating and treatment of particulate material The specification discloses a process for heating solid particulate materials. The process comprises entraining the solid particulate materials in a gas to form a stream of gas containing entrained particles and containing this stream with a stream of hot... | 11/15/1994 |
| 5342430 | Passivation of methylchlorosilane fines A process for the passivation of fine particulate matter exiting a reactor train for the manufacture of organohalosilanes comprising treating the particulate matter or fines with an aqueous medium comprising a polyalkylene ether surfactant and optionally ... | 08/30/1994 |
| 5286278 | Dry process for the cold briquetting of metallurgical dusts A dry process for cold briquetting of metallurgical dusts, including converter steel dust, to provide transportable briquettes which do not give off dust, including the steps of admixing metallurgical dust and at least one basic additive selected from the... | 02/15/1994 |
| 5279645 | Bauxite processing An improved process for the removal of organic matter from bauxite ore containing gibbsite comprises heating the ore under roasting conditions including a roasting temperature of from about 400° C. to about 600° C. with oxygen-containing roasting gas ha... | 01/18/1994 |
| 5248330 | Method of pyroprocessing mineral ore material A method of pyroprocessing mineral ores. The method includes forming the mineral ore fines into small balls or pellets, drying and preheating the pellets and then subjecting the pellets to further heat with an oxidizing gas to substantially oxidize and in... | 09/28/1993 |
| 5139567 | Process for recovering valuable metals from a dust containing zinc There is disclosed a process for recovering valuable metals from a dust containing zinc comprising mixing the dust containing zinc with a reductant and a flux for regulating the basicity of slag, forming the mixture into pellets with a pelletizer, chargin... | 08/18/1992 |
| 5037479 | Method for reduction of heavy metal leaching from hazardous waste under acidic and nonacidic conditions A method of treating solid hazardous wastes containing unacceptable levels of leachable metals such as lead, cadmium and zinc includes mixing the solid waste with a buffering agent selected from the group consisting of magnesium oxide, magnesium hydroxide... | 08/06/1991 |
| 4687512 | Desulfurizing mixture for metal melts, process for making it, and process for desulfurizing liquid metal therewith Mixture for desulfurizing metal melts based on calcium carbide, calcium oxide, alkaline earth metal carbonates, aluminum oxide, chemically unbonded carbon and alkali metal carbonates, if any. The desulfurizing mixture contains 0.3-4.5 wgt % calcium fluori... | 08/18/1987 |
| 4619690 | Chromite ore beneficiation Disclosed is a process for beneficiating chromite ore. The process can also be used to remove SO2 from SO2 -air mixtures which would ordinarily be vented. The chromite ore is pulverized and preferably mixed with sodium sulfate. Ammon... | 10/28/1986 |
| 4376139 | Process for treating metallic starting materials for smelting plants, particularly iron sponge particles For protecting iron sponge particles against reoxidation and/or corrosion a coating comprising CaO as well as iron or iron oxides as adhesion promotor is applied onto the iron sponge particles. Water is subsequently sprayed onto this coating whereupon a s... | 03/08/1983 |
