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8088353 |
Group II metal sulfide phosphor precursor and method for producing phosphor
A process for producing a Group II metal sulfide phosphor precursor, comprising adding to an organic solvent an aqueous solution containing at least one of a Group II element compound, a...
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8071181 |
Metal nanoparticle and use thereof for inducing chirality in liquid crystal phases
The invention provides a metal nanoparticle comprising a metal and a chiral and/or thiolate group bonded to the metal. The monolayer-protected metal nanoparticle may be used as a chiral dopant in a...
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7968065 |
Process for the recovery of value metals from base metal sulfide ores
A process for leaching a value metal from a base metal sulfide ore, comprising the step of leaching the ore with a lixiviant comprising a chloride, an oxidant and hydrochloric acid is disclosed....
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6911570 |
Method for fixating sludges and soils contaminated with mercury and other heavy metals
The invention relates to a method, composition and apparatus for stabilizing mercury and other heavy metals present in a particulate material such that the metals will not leach from the...
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5672328 |
Method and apparatus for removing silver in the form of silver salts from a liquid
By using a method of removing silver in the form of sparingly soluble silver salt, especially silver sulfide, from a solution containing another silver compound, such as a silver thiosulfate...
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5498398 |
Method of treating spent electrolytic solution from electrolytic copper production
Disclosed herein is a method for treating a spent copper-refining electrolyte to remove impurities such as copper (Cu), arsenic (As), antimony (Sb), bismuth (Bi), nickel (Ni) and the like by using...
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5238662 |
Processes for recovering precious metals
Disclosed is a process for recovering precious metals using a combination of smelting and an effective utilization of molten salt chlorination. More specifically, disclosed is a process including...
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5178842 |
Method for precipitating and separating metals
According to the method of the invention, at least one or several of the metals nickel, cobalt and copper can be selectively precipitated as sulphide by aid of elemental sulphur from aqueous...
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5176802 |
Treatment of copper sulfide concentrates
A hydrometallurgical method is provided for recovering copper from particulate copper sulfide flotation concentrate containing at least about 20% copper by weight as cuprous and cupric sulfide, a...
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5074910 |
Process for recovering precious metals from sulfide ores
The present invention is a process to recover precious metals from sulfide ores. It involves chlorinating a mixture of an ore concentrate and salt to form a liquid melt. The salt preferably...
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5013355 |
Method and apparatus for producing matte and/or metal
Method and apparatus for producing matte and/or metal from sulphidic fine-grained ore or ore concentrate. The ore or ore concentrate is smelted in a flame chamber in such a way that at least part...
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4891061 |
Process for treating speiss
Arsenic and antimony are separated from speiss by a roasting operation employing pyrite and coke and the arsenic is separated from the resultant product by a water pressure leaching operation.
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4857104 |
Process for reduction smelting of materials containing base metals
A process for reduction smelting of copper-, nickel- or cobalt-containing materials in which such a material, at least partly in oxidic form is heated or combusted in finely divided form in a...
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4665842 |
Apparatus for producing ignitable solids-gas suspensions
An apparatus for producing ignitable solids-gas suspensions has a feeder for vertically feeding the solids-primary gas suspension, a secondary gas passage concentrically surrounding said feeder,...
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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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4511540 |
Exploitation of copper, nickel and cobalt by treating manganiferous matrix oxidized ores
Process for treating oxidized ores with a manganiferous matrix to recover the small quantities of copper, nickel and cobalt, which consists of attacking the aforementioned ore by means of an...
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4431614 |
Process for the separation of gold and silver from complex sulfide ores and concentrates
The present invention relates to a process for the separation of gold and silver from complex sulfide ores and concentrates which, in addition to the primary metals, contain constituents having an...
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4415356 |
Process for autogenous oxygen smelting of sulfide materials containing base metals
An autogeneous smelting process for suldie materials using a roasted portion blended with unroasted material in the presence of a flux.
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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,...
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4385038 |
Flotation recovery of lead, silver and gold as sulfides from electrolytic zinc process residues
A process is disclosed for the recovery of lead, silver and gold from the iron-bearing residue of an electrolytic zinc process by froth-flotating a slurry of the iron-bearing residue in the...
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4377410 |
Chromium recovery from superalloy scrap by selective chlorine leaching
To recover chromium and other metals from scrap such as superalloy scrap, the scrap is sulfided to provide a molten matte which is cooled and fragmented, the fragments are leached selectively in an...
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4323541 |
Selective two stage leaching of nickel from nickel-copper matte
A finely-ground nickel-copper matte is leached using an acid at a minimum temperature of approx. 80° C. and under oxidizing conditions in order to produce a nickel sulfate solution and a ...
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4304596 |
Process for a sulfidizing pretreatment of the slag of pyrometallurgical processes in order to facilitate its further treatment
Sulfidizing pre-treatment of slag from pyrometallurgical processes in order to facilitate its further treatment, by stacking solid sulfur-bearing reductant and molten slag in alternate layers, the...
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4278539 |
Method for removing heavy metals from aqueous liquids
Method and apparatus for removing heavy metals as sulfides from aqueous liquids. The aqueous liquid is introduced into a circulating liquid loop wherein there are established a mixing zone, a...
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4274870 |
Smelting of copper concentrates by oxygen injection in conventional reverberatory furnaces
A process for the modification to existing and conventional reverberatory furnaces for smelting copper concentrates in such furnaces, for improving the thermal efficiency of the furnace and for...
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4260588 |
Production of sulphidic copper concentrates
A process for the production of a sulphidic copper concentrate from a complex sulphidic concentrate containing as its main constituents copper, iron and at least one non-ferrous metal selected from...
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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...
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4236915 |
Process for oxygen sprinkle smelting of sulfide concentrates
Method for producing a metal matte from a nonferrous metal containing sulfide concentrate in a reverberatory type furnace by sprinkling a mixture of sulfide concentrates, flux and an oxygen-rich...
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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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4157912 |
Process for recovery of copper and zinc from complex sulphides
A process for treating thermally activated metal sulfides containing copper, iron and zinc for separate recovery of zinc as zinc sulfide in which the metal sulfides are subjected to a two-stage...
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4127639 |
Process for recovering silver from residues containing silver and lead
Aqueous lead solutions obtained by hot chloride leaching of residues containing lead and silver ore are subjected to selective precipitation of the silver as silver sulphide, with e.g. hydrogen...
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4049438 |
Non-ferrous metal recovery from deep sea nodules
Manganiferous deep sea nodules containing non-ferrous metal values are selectively reduced to reduce manganic oxides to manganous oxide (MnO) and the non-ferrous metal values to the metallic state,...
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4045211 |
Method for increasing radiant heat transfer from hot gases
Radiant heat transfer is increased by introducing to hot gases, such as those normally present in furnaces, a material which provides finely sized particles therein of the type which increase the...
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4004990 |
Process for separating and recovering nickel and cobalt
A process for separating and recovering nickel and cobalt is provided wherein a sulfide material containing cobalt and nickel is first oxidation-roasted to remove volatiles and to convert the...
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3985555 |
Decomposition of chalcopyrite
Chalcopyrite is decomposed by treatment with aqueous acid solution and a metallic reductant to form either metallic copper or copper sulfide, ferrous iron and hydrogen sulfide.
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3962051 |
Atmospheric leaching of matte containing iron
A method is provided for leaching comminuted nickeliferous sulfide matte containing by weight about 20% to 75% nickel, about 5% to 50% copper, non-stoichiometric sulfur in the range of over 4% to...
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3915692 |
Pyrometallurgical process for the treatment of solids, preferably metallurgical raw materials or intermediates
A pyrometallurgical process for the processing of solids and especially metallurgical intermediates and ores which form molten products at the treatment temperature, provides a mixture of the...
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3892559 |
Submerged smelting
Smelting of mineral products such as concentrates, rich ores and calcines in which the copper plus zinc content comprises a substantial value is effected by injecting a finely divided mixture of...
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3891522 |
Hydrometallurgical process for treating copper-iron sulphides
A hydrometallurgical process for the activation of copper-iron sulphides and for the extraction of copper values and sulphur in elemental form from said activated copper-iron sulphides. The...
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3880732 |
Hydrometallurgical process for the production of copper
An improved process is described for the recovery of metallic copper from sulfur treated copper iron sulfide ore concentrates. X-bornite may be prepared from the chalcopyrite content of such ore...
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3832453 |
RECOVERY OF SILVER FROM PHOTOGRAPHIC PROCESSING SOLUTIONS
Silver is recovered from an exhausted photographic fix or bleach-fix solution by bringing together just at the entrance of a static mixer a stream of a sodium sulfide solution and a stream of fix...
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3789097 |
PROCESS FOR PRODUCING PELLETIZED METAL SULFIDE MATERIALS
A process of producing pelletized metal sulfide material bonded by reaction products of lime contacted by sulfur dioxide, so that the resulting pellets will have cohesive strength capable of...
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3514281 |
PRODUCTION OF PYRITE AND/OR SULFURIC ACID AS BY-PRODUCT OF COPPER SMELTING PROCESS
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3577231 |
PROCESS FOR PREPARING METAL SULFIDES
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3817743 |
TREATMENT OF COPPER IRON SULFIDES TO FORM X-BORNITE
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3459535 |
TREATMENT OF COPPER BEARING COMPLEX SULPHIDES
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3313601 |
Recovery of metal values from oxygenated ores
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3222162 |
Reverberatory matte-smelting process
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3155492 |
Metallurigical process
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3102806 |
Reverberatory smelting method and apparatus
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