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6030433 |
Method for extracting metals from metal-containing materials by pyrohydrolysis
A method for extracting metals from metal-containing materials, especially waste, by pyrohydrolysis. The metal-containing materials which contain at least one or more of the metals from the group...
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5851490 |
Method for utilizing PH control in the recovery of metal and chemical values from industrial waste streams
An improved method for the recovery of metal and/or chemical values from an industrial waste stream containing zinc, cadmium, lead and/or iron compounds by heating the waste stream in a reducing...
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5612008 |
Process for treating solid waste containing volatilizable inorganic contaminants
A process for the removal of volatilizable inorganic contaminants from solid waste is provided. The process comprises the steps of: (a) providing solid waste containing volatilizable inorganic...
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5474592 |
Method of reprocessing metallurgical residues, which contain zinc and lead
Residual metallurgical materials which contain zinc and lead are reprocessed by a thermal treatment in a circulating fluidized bed. The required heat is generated in that solid carbon is combusted...
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5433855 |
Process for extracting metal values from aqueous solution
A process for extracting metal values especially zinc values from aqueous solutions of metal salts which comprises contacting the aqueous solution with an organic phase comprising a compound of the...
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5162107 |
Method of reprocessing zinc- and lead-containing residues from metallurgical plants by means of a circulating fluidized bed system
A zinc- and lead-containing residue from a metallurgical plant is reprocessed by a thermal treatment in a circulating fluidized bed system. A major part of the heat demand is satisfied by a...
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5013532 |
Method for recycling electric arc furnace dust
This invention relates to the metallurgy of iron and particularly to the separation and recovery of metals from electric arc furnace (EAF) dusts. While the invention discloses a process for the...
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4983368 |
Method of producing β-sialon fine powder
A method of producing a β-sialon fine powder which comprises using a silane compound represented by the general formula of SiH x Cl 4 -x (0≤x≤4) as a Si source, aluminum chloride as an Al...
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4889702 |
Process for removing metallic constituents from dust obtained during the electrothermal production of yellow phosphorus
Metallic constituents, especially heavy metal constituents are removed from dust electrostatically separated from a gas mixture consisting substantially of carbon monoxide and phosphorus in vapor...
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4842832 |
Ultra-fine spherical particles of metal oxide and a method for the preparation thereof
Ultra-fine spherical particles of a metal oxide having an average particle diameter of 40 nm or smaller can be prepared by a method in which a vaporizable metal compound is vaporized and decomposed...
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4800069 |
Zinc recovery from furnace dust
Zinc and other metals are recovered form strongly bound zinc ferrite compounds in furnace dust. To the dust is added 1 weight percent of free zinc oxide unless already present. The dust is treated...
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4765829 |
Treating lead- and zinc-containing steelmaking byproducts
According to the instant invention fine and very fine granular zinc- and lead-containing oxidic byproducts are mixed with thermally inert additives and are hot briquetted with caking coal as a...
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4695447 |
Destruction of inorganic hazardous wastes
Hazardous waste containing inorganic compounds which contain heavy metals or particular hazardous anionic groups or which are hazardous halides or non-metal oxides or sulfides is contacted with...
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4678507 |
Treatment of dross
Lead constituents may be removed from a dross to produce a copper matte low in lead assay by melting the dross at temperature in excess of 900° C., allowing the molten dross to separate into a...
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4673431 |
Furnace dust recovery process
A process for selective vaporization of oxides from recovered waste dust collected from a bag house. Pellets are formed from the waste dust and dried to permit charging in an oxidizing chamber...
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4561884 |
Apparatus for removal of impurity components from sulphidic and metallized molten copper mattes
A process for the removal of impurities from sulphidic and metallized molten copper mattes, in which in preliminary smelting of the crude metal molten sulphide and molten arsenide-antimonide phases...
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4493732 |
Method for implementing pyro-metallurgical processes
A method and apparatus for implementing pyro-metallurgical processes, such as those involved in the reaction melting of fine grained solids or for the after-treatment of melts wherein an...
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4489046 |
Method for working-up arsenic-containing waste
A method is disclosed for converting an arsenic-containing waste product to a depositable, substantially arsenic-free form by fuming-off the arsenic content thereof. The method comprises melting...
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4447261 |
Method for separating non-ferrous metals from iron-containing materials
A method for separating non-ferrous metals from an iron-containing waste material which includes providing separate contiguous layers of the waste material and a sintering mixture containing a...
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4396424 |
Method for recovering useful metals from dust discharged from metal refining metallurgical furnace
In a method for recovering zinc and lead from a dust containing ferric oxide, zinc oxide and lead oxide discharged from a metal refining metallurgical furnace, the dust is charged into the entry of...
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4220629 |
Chlorination of ores with catalyzed metal chlorides
The invention comprises a process for the manufacture of metal chlorides by the double-decomposition reaction between a metal chlorinating agent and a metal oxide having greater affinity for...
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4169725 |
Process for the refining of sulfidic complex and mixed ores or concentrates
A suspension of finely divided impure sulfidic complex or mixed ores or concentrates and air flowing downwards in a reaction zone at a high temperature is first oxidized to vaporize the impurities...
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4108634 |
Process for thermally treating fine-grained solids
A process for thermally treating fine-grained solids with high-oxygen gases at temperatures at which the solids can form molten and gaseous reaction products comprises carrying out the thermal...
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4092152 |
Volatilization of impurities from smelter reverts
A process for substantially reducing the presence of impurities from a sulfur-containing feed material such as dust and hydrometallurgical wastes that result from smelting and refining operations....
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4065294 |
Energy conserving process for purifying iron oxide
Chemical waste by products are used in place of conventional heating fuels both for induration and chloridization of impure iron oxide. Pelletized iron oxide is hardened and purified simultaneously...
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3997337 |
Separation and/or purification of precious metals
A process for the treatment of a concentrate of by-metals comprises heating he concentrate at between 1100° C and 1500° C, preferably at about 1300° C, in a gaseous stream which comprises...
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3896211 |
Purification of iron oxides
In the method of purifying iron oxides as such or obtained by roasting sulfur containing iron ores, in which said oxides are contacted in a reactor with a hot carrier gas and at least one...
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3891428 |
Method for treating non-ferrous metal slag
A method of treating non-ferrous slag in a furnace by injecting liquid fuel and air into molten slag to heat and reduce the slag. The injection of the liquid fuel and air is obtained by discharging...
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3042501 |
Separation and recovery of volatile sulphides from sulphide materials
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3017261 |
Recovery of zinc from zinc-containing materials
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2784082 |
Ore smelting processes
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3676107 |
Title is not available
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RE08943 |
Title is not available
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3728241 |
Title is not available
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RE09442 |
Title is not available
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