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7905941 |
Recovery of non-ferrous metals from by-products of the zinc and lead industry using electric smelting with submerged plasma
This invention relates to a single-step pyrometallurgical process for the recovery of non-ferrous metals from zinc bearing residues, in particular from by-products of the zinc and lead industry...
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6241797 |
Process for reducing oxidic slags
There is disclosed a process for reducing oxidic slags or combustion residues above a metal bath. The metal bath is formed of an iron alloy containing metals nobler than iron and whose redox...
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5733356 |
Method and device for processing free-flowing materials
A method and apparatus for processing a contaminated free-flowing material and, in particular, filter dust from industrial metallurgical waste and domestic waste incineration plants are disclosed....
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5728193 |
Process for recovering metals from iron oxide bearing masses
A process for recovering iron from an iron oxide bearing mass. The process includes forming a bed of lump coke in a vertical shaft furnace, feeding the iron oxide bearing mass and scrap metal onto...
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5500870 |
Process and device for the extraction of valuable substances
A process and melting furnace unit are provided for extracting valuable substances by reducing oxygen-bound metals which process includes exposing a charge in a first reaction zone of a furnace...
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5443614 |
Direct smelting or zinc concentrates and residues
The present invention is concerned with a process for the direct smelting of zinc containing materials. The process includes volatilizing zinc from zinc-containing materials into a gas phase, while...
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5403380 |
Method for producing easily volatile metals, such as zinc, lead, mercury and cadmium, of sulfidic raw materials
The invention relates to a method for producing zinc, cadmium, lead and other easily volatile metals from sulfidic raw materials in a pyrometallurgical process. In the method, zinc sulfide...
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5372630 |
Direct sulphidization fuming of zinc
A process for treatment of zinc sulfide or other zinc bearing feed materials in conjunction with an iron sulfide containing mineral or compound to effect a separation of zinc from iron by fuming on...
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5358544 |
Method of recovering zinc
Zinc is recovered from zinc sulphide material by introducing such material at a feed station into a molten copper sulphide matte which is circulated in a closed loop path through said feed station,...
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5232486 |
One step process for the treatment of Parkes desilvering crust to recover zinc and produce a suitable feed for cupellation
A process of treating argentiferous alloy variously called "zinc crust" or "silver crust", obtained in the separation of silver from lead, removes sufficient zinc in one apparatus and process step...
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5196047 |
Method of treatment of zinc-containing by-products and waste materials
The present invention relates to a method for treatment of zinc-containing by-products and waste materials from primary and secondary production of nonferrous metals and especially zinc- and...
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5004496 |
Method and apparatus for treatment of dust recovered from off gases in metallurgical processes
The method for treating the dust entails the following steps: (a) supplying a combination of dust, a reducing agent and flux to a gastight electrothermic smelting furnace, (b) smelting, reducing...
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4957551 |
Method for treatment of dust recovered from off gases in metallurgical processes
The method for treating the dust entails the following steps: (a) supplying a combination of dust, a reducing agent and flux to a gastight electrothermic smelting furnace, (b) smelting, reducing...
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4818282 |
Method for recovering metal-carbide scrap by alloying
The invention concerns a method, equipment and a regulating means for use in recovering metal-carbide scrap by alloying. This is carried out by treating the scrap with a low melting point metal...
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4767452 |
Process for separating metals by distillation and condensation
Process and equipment for separating molten metals with a distillation part (1) and a condenser part. The metal vessel (12) of the distillation part (1) is tiltable about at least one horizontal...
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4606760 |
Method and apparatus for simultaneously separating volatile and non-volatile metals
A method and apparatus for simultaneously separating volatile metals, including zinc and lead, and non-volatile metals, including copper, from mixtures of metallic and metallic oxide and the like...
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4514221 |
Method of smelting zinc by injection smelting
A method of recovering metallic zinc is disclosed, wherein zinc calcine is introduced to a smelter together with oxygen-enriched air and pulverized coke or coal as reducing agents. The smelter...
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4508566 |
Method of cleaning a gas flow containing zinc vapor
A gas mixture obtained from reduction of material containing zinc oxide in a furnace, is cleaned from accompanying vapor of metals or compounds having a boiling point higher than zinc and from...
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4326884 |
Process for obtaining metal values from ores containing such metals as oxides or convertible into such oxides
The invention relates to a process for obtaining metal values from ores containing such metals as oxides or convertible into such oxides, the process comprises grinding an ore at room temperature;...
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4168156 |
Method of and electric furnace for processing nonferrous molten slags
A method comprising the steps of supplying a carbonaceous reducer in a layer onto the surface of molten slag and feeding an oxygen-free gas into said slag in an amount and at a rate ensuring...
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4141721 |
Method and apparatus for complex continuous processing of polymetallic raw materials
A method for processing complex metallic materials, such as, copper-zinc or copper-lead-zinc concentrates and also slag-containing zinc and lead, by melting these materials in an atmosphere of gas...
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4131453 |
Pyrometallurgical brass production
Waste materials containing significant quantities of zinc oxide are mixed with carbon and a sufficient amount of copper to set the overall Zn/Cu weight ratio to a selected value below 0.66. The...
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4131451 |
Method for removing zinc from zinc-containing slags
A method for removing zinc from zinc-containing slags resides in that zinc is recovered from a bath of said slag by introducing a reducing agent, such as coke, thereinto, and by further blowing...
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4072503 |
Thermal treatment of leaching residue from hydrometallurgical zinc production
Pyrometallurgical process for recovering lead, zinc and precious metals from leaching residues and precipitates occuring during the hydrometallurgical production of zinc, comprising a weak...
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3555164 |
METHOD OF PROCESSING ORES AND CONCENTRATES CONTAINING RARE METALS AND A UNIT FOR EFFECTING SAID METHOD
An ore-processing device comprising a melting chamber, a cyclone apparatus having an outlet hole and being connected to said chamber, an ejecting device for furnishing a charge to the device and a...
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3685985 |
METHOD FOR THE REMOVAL OF IMPURITIES FROM METALLIC ZINC
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3451805 |
ELECTROTHERMAL REDUCTION OF OXIDE ORES OR OTHER OXIDE COMPOUNDS
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3448973 |
APPARATUS FOR PURIFYING METALS AND RECOVERY OF METAL PRODUCTS THEREFROM
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3244511 |
Electrothermal reduction of oxide ores or other oxide compounds
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3016237 |
Installation for the vaporisation, under vacuum, of the volatile constituent of an alloy
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2931719 |
Process and apparatus for the production of metals by dissociation of their carbides
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2928729 |
Treatment of ores or the like
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2912322 |
Transfer of zinc vapour from a furnace to a condenser
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