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6293993 |
Method for recycling brass foundry waste
A recycling process for zinc-rich solid waste containing zinc oxide, Cu oxides and impurities normally present in brass, in which a mixture is formed containing the waste with a finely divided...
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5540752 |
Method for recovery of non-ferrous metals from scrap and dross
A process and apparatus are disclosed for recovering a non-ferrous metal, preferably aluminum and aluminum alloys, in molten coherent form from a charge of material to be processed containing the...
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5505762 |
Lance for immersion in a pyrometallurgical bath and method involving the lance
A method for submerged injection of materials into a liquid pyrometallurgical bath by means of a lance, characterised in that a first gas consisting of or containing oxygen is conveyed to said bath...
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5411572 |
Method for utilizing smelter waste containing zinc and other valuable metals
The invention relates to a method for utilizing zinciferous waste from metal smelters, such as steel smelters, so that the transmission of fluorides to the highly zinciferous secondary dusts is...
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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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5192487 |
Apparatus for treating zinc concentrates
A method and apparatus for treating zinc concentrates in order to recover zinc. The method includes an oxidizing and smelting stage (10) and, subsequent to the smelting stage, a fuming stage (20)...
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5131944 |
Method and apparatus for treating zinc concentrates
A method and apparatus for treating zinc concentrates in order to recover zinc. The method includes an oxidizing and smelting stage (10) and, subsequent to the smelting stage, a fuming stage (20)...
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5091001 |
Disposal of spent vanadium pentoxide catalyst by vitrification
Spent oxidic catalyst, such as vanadium pentoxide from a sulphuric acid manfacturing process, is rendered into an environmentally acceptable non-leachable form suitable for disposable by...
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4741770 |
Zinc smelting process using oxidation zone and reduction zone
A smelting process of superior energy efficiency, particularly suitable for the extraction of zinc, but also of lead and copper from raw materials comprising sulphide concentrates, and oxidized...
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4519836 |
Method of processing lead sulphide or lead-zinc sulphide ores, or sulphide concentrates, or mixtures thereof
A method of processing lead sulphate or lead-zinc sulphide ores, or sulphide concentrates, or mixtures thereof, residing in that said lead sulphide or lead-zinc sulphide ores, or sulphide...
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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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4334918 |
Method of recovering non-ferrous metals from their sulphide ores
A method of recovering non-ferrous metals from their ores comprises introducing the ore into a molten sulphide carrier that is forcibly circulated through an extraction circuit, contacting the...
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4252563 |
Process for the fuming treatment of metallurgical slag
A continuous process for the fuming treatment of metallurgical slag, e.g. lead and copper smelting furnace slag. Passing the slag continuously through consecutive slag treatment zones of a fuming...
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4251271 |
Submerged injection of gas into liquid-pyrometallurgical bath
A method of injecting gas into a pyrometallurgical bath is disclosed, wherein the gas is injected through a lance having an interior duct for flow of gas therethrough and a discharge end at which...
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4221591 |
Method for reclaiming galvanizing quality zinc alloy from continuous galvanizing line top dross
Means and a method for reclaiming galvanizing quality zinc alloy from the top dross of a continuous galvanizing line. A dross furnace is provided having front, rear and side walls and a hearth...
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4210441 |
Method for the continuous or discontinuous treatment of molten slag, particularly with contents of heavy metal oxides, for the recovery of portions contained therein of valuable metals or their combinations, respectively
A method and mechanism for treatment of molten slag having heavy metal oxides for the recovery of valuable metals contained therein through precipitation during slag melting and volatilization out...
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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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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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4076521 |
Method for continuously blowing materials into molten slags
A metallurgical method and apparatus; air is continuously blown into a mixture of agglomerates of lead concentrates and carbonaceous fuel in a shaft furnace. The resulting slag is delivered from...
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4075008 |
Method for the reclamation of zinc from galvanizing baths
Zinc is removed in a substantially pure form from the dross skimmings of galvanizing baths. The dross is poured into a mold and solidified. The solidified mold is then placed on a permeable base...
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4033760 |
Aluminum dross recovery method
Dross, principally oxides and nitrides of aluminum and entrained metallic aluminum, is transferred quickly from the melting furnace to a cooling drum and cooled in less than 3 minutes to below...
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4003559 |
Apparatus for recovery of metallic zinc from dross
An apparatus for separating and recovering metallic zinc from an ash-like solid substance composed of a mixture of metallic zinc, zinc oxide and other zinc containing materials is disclosed. This...
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3984235 |
Treatment of converter slag
A process for the production of copper from raw materials containing sulphur, zinc and more than 0.2% Ni calculated on the copper content. The material is melted to matte and the matte converted to...
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3909243 |
Recovery of both brass and zinc from metallurgical residues by carbon flotation method
A method of recovering both brass and zinc from metallurgical residue containing those metals and including slag containing zinc oxide, comprising charging the residue into a furnace, in such...
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3902894 |
Refining process for zinc recovery
A process of recovering zinc, contained in scrap, residues and mattes in amounts up to ninety-eight percent of the base metal of the scrap or matte, with a minimum of iron impurities, involves...
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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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3793004 |
METHOD FOR TREATING ZINC CADMIUM LEAD AND TIN DROSS
Drossing fluxes for zinc, lead or tin comprise a salt of a sulphur or phosphorus acid which contains hydrogen in the anion, and either an alkali metal chloride or an alkaline earth metal chloride.
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3512959 |
METHOD OF PREPARING MELTS OF ZINC BASE ALLOYS AND IMPROVED FLUX THEREFOR
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3300300 |
Method for the treatment of zinciferous metallurgical slags and apparatus therefor
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3198505 |
Metal recovery apparatus
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3037711 |
Method of and installation for processing dross of non-ferrous metals
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3017261 |
Recovery of zinc from zinc-containing materials
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2936233 |
Zinc recovery
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2936234 |
Metallurgy of zinc
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2865739 |
Process and apparatus for recovering zinc
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2854229 |
Oil burning tuyere
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2795500 |
Process of removal of zinc values from slag
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