|
Match
|
Document |
Document Title |
|
|
8092764 |
Method of processing non-ferrous smelting intermediate containing arsenic
Provided is a method of easily producing easily-filterable and stable scorodite that meets the leaching standard (conformance to Japanese Environmental Agency Notice 13) with excellent...
|
|
|
8057577 |
Desulfurizer for fuel gas for fuel cell and desulfurization method using the same
A desulfurizer for fuel gas for a fuel cell includes: a first adsorption tank including an adsorber having selective adsorption capacity for a thiophene-based compound and a second adsorption tank...
|
|
|
8029897 |
Nanometric or mesoscopic dissymetric particles, and method for preparing same
The invention relates to nanometric or mesoscopic dissymmetric particles, and to a method for preparing the same. The particles have an inorganic part A and a spherical organic part B bound by...
|
|
|
7498006 |
Process for extracting gold in arsenic-containing concentrate of gold
A method of extracting gold from arsenic gold ore concentrate, wherein increase the temperature of smelting chamber to 100-300° C. and then hold the temperature to remove the vapor and small ...
|
|
|
7491372 |
Procedure to leach copper concentrates, under pressure and at ambient temperature, by forming a reactive gel in a sulfate-chloride medium
A chemical process to leach copper concentrates in the presence of a concentrated solution of sulfates and chlorides. The process includes forming a high reactivity chemical paste containing a high...
|
|
|
7264781 |
Calcining plant and method
Particulate material to be calcined is conditioned and then introduced into a stream of flue gases which transport the material along a sloping drying duct while drying the material. The dried...
|
|
|
6933861 |
Key-operating device for a hand-held video game apparatus
A key-operating device includes a shell confining a chamber therein and connected to a video game apparatus with depressible keys, a lever pivotally mounted in the chamber and having protrusions...
|
|
|
6755891 |
Process for the treatment or removal of impurities in a hydrometallurgical extraction process
A Process for the treatment or removal of impurities, such as arsenic, antimony or bismuth, generated as by-products during smelting and refining of copper concentrates, comprises subjecting the...
|
|
|
6482373 |
Process for treating ore having recoverable metal values including arsenic containing components
Roasting of ores with metal values such as precious metal ores for recovery of metal values with conversion of arsenic to an insoluble form in-situ in presence of an additive such as iron and in...
|
|
|
6475462 |
Process and apparatus for treating particulate matter
The present invention provides a process for treating a particulate material, in which particles of the material to be treated interact with non-static particles of a second material, the process...
|
|
|
6451275 |
Methods for reducing cyanide consumption in precious metal recovery by reducing the content of intermediate sulfur oxidation products therein
Briefly stated, there is provided a method for reducing cyanide consumption in precious metals mining extraction processes involving a sulfur bearing ore body, comprising the steps of providing a...
|
|
|
6409978 |
Method of removing impurities from mineral concentrates
A process for removing impurities contained in the crystal lattice of minerals, comprising the steps of forming a mixture of a mineral capable of structurally reorganizing its crystal lattice which...
|
|
|
6403043 |
Use of gaseous mixture containing an inert gas and an oxygen containing gas in desulphurization of blister copper during anode refining
The invention is concerned with an improved process for the desulphurization of blister copper during anode refining, wherein a mixture of an inert gas and an oxygen containing gas is blown into...
|
|
|
6342190 |
Process for increasing recovery of precious metals in an ore processing operation
An ore separation process is provided which begins with a specially designed primary grinding mill. The primary grinding mill grinds the ore into a fine powder which is then blown into the primary...
|
|
|
6270555 |
Process for treating precious metal ores
This invention provides a method to control the off gas emission of sulfur dioxide from a mineral ore roaster by grinding a sulfur-containing mineral ore, adding sodium sesquicarbonate to the...
|
|
|
6143259 |
Treatment of pyrite and arsenophrite containing material with ferric ions and sulfur dioxide/oxygen mixture to improve extraction of valuable metals therefrom
A method of treating a mined material which includes a sulphide mineral and iron or a concentrate of the mined material to improve the recovery of a valuable metal from the sulphide mineral is...
|
|
|
5804150 |
Process for treating gold-containing sulfide ores
The ore which contains gold and at least one of the metals silver, copper, nickel, zinc or iron is calcined at temperatures in the range from 500° to 900° C. with the addition of o...
|
|
|
5783158 |
Process for treating sulfide ores containing gold and/or silver and as accompanying metal at least iron
The ore which contains gold and/or silver and as accompanying metal at least iron is calcined at temperatures in the range from 500° to 900° C. with the addition of oxygen-containing gas. There i...
|
|
|
5762891 |
Process for stabilization of arsenic
The present invention is a method to remove arsenic from arsenic-containing materials, such as an ore or concentrate, by roasting the arsenic-containing material to convert arsenic sulfides into...
|
|
|
5425799 |
Process for roasting refractory gold ores
Refractory gold ores are roasted at temperatures from 500° to 650° C. in an oxidizing atmosphere in a fluidized bed, which is supplied with a carbonaceous additional fuel. To effect a s...
|
|
|
5380504 |
Treatment of gold bearing ore
The present invention relates to a process for roasting gold containing ore in which a flash furnace means is provided, in particular a gas suspension furnace for roasting the ore. Hot gas and the...
|
|
|
5262063 |
Multiple-stage precipitation process for heavy metals in aqueous solution
In the process of removing heavy metals from aqueous solutions by precipitation of a salt thereof at increased pH, multiple stage precipitation by upward stepwise pH adjustment and solid separation...
|
|
|
5254320 |
Method for roasting sulphide ores
A method for roasting sulphide ores or ore concentrates containing precious metals is practiced in a furnace, typically in a fluidized bed. The ore and a sulphur-binding lime-containing material...
|
|
|
5234669 |
Recovery of non-ferrous metals from smelter flue dusts and sludges
Methods are disclosed for treating smelter flue dust and other smelter by-products so as to recover non-ferrous metals therefrom and convert arsenic and sulfur in the flue dust into non-leachable...
|
|
|
5188713 |
Process for recovery of metal
A process for recovery of metal from a feedstock comprising copper is provided. The process comprises the steps of: (a) contacting the feedstock with an aqueous mixture comprising ammonium nitrate...
|
|
|
5132102 |
Method for heat treatment of fines with atmosphere control
A method to operate a flash calcination unit with both atmosphere and temperature control is described for mineral processing requirements and other atmosphere controlled processes. The method can...
|
|
|
5126116 |
Method for forming copper arsenate
The invention provides a method of forming copper arsenate. Copper and arsenic are leached into a treatment solution maintained at a pH level of about 2 to 5 in the presence of at least one...
|
|
|
5123956 |
Process for treating ore having recoverable gold values and including arsenic-, carbon- and sulfur-containing components by roasting in an oxygen-enriched gaseous atmosphere
Recovery of a precious metal value from refractory carbonaceous and sulfidic ores, concentrates or tailings which also include arsenic-containing components is improved by roasting the ore or ore...
|
|
|
5104445 |
Process for recovering metals from refractory ores
The present invention is a process to recover metals from refractory ores. It involves the chlorination of an ore concentrate in the presence of solid salt at a temperature between 300° and 650° C...
|
|
|
5032175 |
Process for removing impurities from flue dusts
The invention is a process for the removal of high concentrations of impurities including antimony (Sb), bismuth (Bi), arsenic (As), lead (Pb), zinc (Zn), cadmium (Cd), selenium (Se) and tellurium...
|
|
|
4731114 |
Recovery of precious metals from refractory low-grade ores
Low-grade refractory gold ores, which may also contain silver and other metal values are treated by partial roasting of concentrate to remove controlled amounts of sulfur and carbon, then oxygen...
|
|
|
4729888 |
Process of recovery of sulphur from minerals containing pyrites
Production of elementary sulphur from an iron sulphide mineral, which comprises oxidizing acid lixiviation of the pulverized mineral, for extraction of the sulfur. The pulp obtained from the...
|
|
|
4726937 |
Recovery of nickel chloride and sulfur from waste products
Waste containing sulfur and nickel sulfide is heated to volatilize sulfur and reacted with hydrogen chloride to form nickel chloride.
|
|
|
4629502 |
Pressurized reaction of refractory ores with heat recovery
Metal is removed from particlized metal bearing refractory ores in an efficient manner utilizing pressure metallurgy with heat recovery. The particlized ore is mixed with a heated liquid, and...
|
|
|
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...
|
|
|
4497778 |
Microbial leaching of sulphide-containing ores
A process of extracting metals from a material containing at least 10% by weight of pyrite and selected from the group consisting of ores containing sulphide, concentrates of such ores and mixtures...
|
|
|
4394164 |
Process for removal of harmful impurities from metallurgical sulphide melts
A process for the removal of harmful impurities, particularly arsenic, antimony, bismuth and lead, from metallurgical sulphide melts, in which the sulphide melt is sulphurated before conversion,...
|
|
|
4386061 |
Method of treating pyrite bearing polymetallic material
A method of treating pyrite bearing polymetallic material comprises heating the material in an atmosphere of reducing gases at a temperature of 450° to 500° C. for a period of 30 to 60 min.Gases s...
|
|
|
4376647 |
Process for treating sulfide-bearing ores
A process for removing sulfur from sulfide-bearing ores by reacting water vapor with the sulfide-bearing ore forming hydrogen sulfide while simultaneously regenerating water vapor by reacting the...
|
|
|
4368176 |
Desulfurizing roast of pyrite bearing polymetallic raw material
A method comprises heating the material to be treated without access of air at a temperature of 700° to 800° C. for a period of 1-2 hours, and then subjecting this material to subsequent magnetic s...
|
|
|
4324582 |
Process for the recovery of copper from its ores
A process for the recovery of copper from its ores by conventional procedures requiring heat in which the source of heat is microwave energy. The microwave energy is used to selectively heat the...
|
|
|
4241031 |
Dissolution of nickeliferous sulfide material in HCl
A process is provided for leaching nickeliferous sulfide material, such as NiS precipitate and thermally activated nickel sulfide material, e.g., nickel matte, the process comprising subjecting...
|
|
|
4226617 |
Method for treating a mineral sulfide
This invention relates to method and apparatus for treating a sulfur containing material having at least one principal sulfide either in the form of a sulfide or in a form that is transformable...
|
|
|
4224058 |
Methods of desulphurizing fluid materials
A method for desulphurizing fluid materials such as molten iron, steel, stack gases, synthetic natural gases, boiler gases, coal gasification and liquification products and the like is provided in...
|
|
|
4201748 |
Process for thermal-activation of chalcopyrite-pyrite concentrates
A process for thermal activation of chalcopyrite-pyrite ore concentrates for activation of iron values in both chalcopyrite and pyrite constituents whereby said iron values can be selectively...
|
|
|
4168217 |
Roast-leach copper recovery
A copper-containing sulfidic material is dead-roasted at a temperature of at least 750° C. and the resulting calcine is leached in a sulfuric acid solution to dissolve most of the copper in ...
|
|
|
4155749 |
Process for converting non-ferrous metal sulfides
Non-ferrous metal sulfides are converted to recover metals therefrom in a high speed rotary converter, wherein an oxygen-containing gas is used for said conversion, with sulfur trioxide added to...
|
|
|
3964901 |
Production of copper and sulfur from copper-iron sulfides
A hydrometallurgical process for treating iron containing metal sulfides for rendering iron and non-ferrous metal values active and amenable for selective extraction and separate recovery. Sulfur...
|
|
|
3791817 |
RECOVERY OF COOPER FROM COPPER SULFIDE CONTAINING CONCENTRATES
Low grade copper sulfide containing concentrates and ores are treated with an alkaline cyanide, such as calcium cyanide and excess lime or sodium cyanide and excess sodium alkali. This dissolves...
|
|
|
3791812 |
PROCESS FOR THE RECOVERY OF NON-FERROUS METAL VALUES FROM SULFIDE ORES AND THE REDUCTION OF GASEOUS EMISSIONS TO THE ATMOSPHERE THEREFROM
A process for roasting an admixture of an inorganic chloride and a sulfide ore for subsequent extraction of substantially all of the copper, nickel, cobalt and manganese values of the ore as water...
|