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WO/2010/016020A2 |
A method of production of Zinc dust, which includes melting Zinc products in a melting furnace on a semi-continuous basis, transferring at least a part of the molten Zinc products to a vaporizing furnace, vaporizing the molten Zinc in th...
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WO/2010/005023A1 |
The objective is to manufacture briquettes with increased strength, even when using minimal quantities of binder and water. To achieve this, a briquette manufacturing method includes a process in which primary particulates are formed usi...
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WO/2009/155651A1 |
A process for the treatment of a solution containing at least ferric ions, and one or more metal values, said process including the step of maintaining a controlled concentration of ferric ions in solution for a sufficient residence time...
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WO/2009/156662A2 |
The invention relates to a method for processing metallurgical residue from electric steel mill dust essentially containing iron and zinc in the form of zinc oxide and zinc ferrites, to a processing of blast-furnace sludge, and to a comb...
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WO/2009/145348A1 |
A method for producing pig iron by using high zinc-content iron ore includes steps of producing blast furnace feed (2) by using the high zinc-content iron ore containing 0.01 mass% or more zinc and 50 mass% or more iron, producing the pi...
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WO/2009/136299A2 |
The present invention regards a chemical process for treatment of industrial ironworks residue, generically called "steelworks powder", in order to make possible the subsequent recovery of zinc, iron and other interest metals there conta...
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WO/2009/131242A1 |
A process for the production of direct-reduced iron, which comprises a step of preparing a mixed raw material, a step of charging the mixed raw material, and a reduction step. The step of preparing a mixed raw material is conducted by p...
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WO/2009/129823A1 |
The invention relates to a method for recycling iron carriers containing zinc and/or lead, in particular iron residue materials from iron and steel production, wherein iron carriers containing zinc and/or lead are mixed with an additive ...
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WO/2009/110149A1 |
A process for the recovery of valuable metals from scrap IZO, characterized by conducting electrolysis by using an insoluble electrode as the anode and scrap IZO as the cathode to recover metallic indium and zinc or suboxides of both. Th...
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WO/2009/101863A1 |
A method of recovering valuable metals from an IZO scrap, characterized by using an insoluble electrode as an anode or cathode and using the IZO scrap as a cathode or anode, which serves as a counter electrode for the insoluble electrode...
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WO/2009/101864A1 |
A method of recovering valuable metals from IZO scraps, characterized by using the IZO scraps respectively as an anode and a cathode to conduct electrolysis while periodically reversing the polarity, and recovering the indium and zinc in...
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WO/2009/087908A1 |
A method of recycling useful metals is provided. The method enables useful metals including indium, zinc, yttrium, europium, lanthanum, terbium, gadolinium, antimony, lead, copper, tin, and silver to be recovered from wastes, such as aba...
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WO/2009/050334A1 |
The invention relates to a method for recovering the valuable metals from sulphidic raw material containing at least copper and zinc by means of hydrometallurgical treatment. Copper sulphide and zinc sulphide are components of the raw ma...
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WO/2009/043961A1 |
The invention relates to a novel electric induction furnace design that enables the removal of zinc-containing filter dust (PF) originating from the production of alloy or non-alloy steel and the production of cast iron with galvanised s...
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WO/2009/030811A1 |
The invention relates to a method for the preparation of a copper concentrate suitable for pyrometallurgical treatment from a concentrate in which zinc is present as an impurity. In accordance with the method, zinc is leached from the co...
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WO/2009/032109A1 |
A process for producing lead and zinc from concentrates of zinc and lead sulfides or oxides includes the steps of: (a) mixing lead ore and/or zinc ore concentrates, iron bearing and carbon containing materials, metallic iron fines and ir...
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WO/2009/017019A1 |
This invention provides a method for reducing an electric furnace dust, comprising compressing molding a powdery mixture of an electric furnace dust, produced in an electric furnace for steelmaking, with a carbon material to prepare a br...
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WO/2008/149683A1 |
At least one member selected from among ASR, household electrical appliance shredder dust, waste plastic, waste-derived RDF, RPF, polluted sludge, oily sludge, waste wood, waste fiber, waste rubber and animal or plant residue as a waste ...
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WO/2008/144967A1 |
A method for recovery and production of ultrafine zinc powder from zinc-containing dust involves steps as follows: adding zinc-containing dust into alkaline solution, stirring the solution at the temperature 20?~60? and separating the so...
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WO/2008/145490A1 |
The invention relates to a method for processing residue containing zinc ferrites and nonferrous metals selected from the group comprising lead (Pb), silver (Ag), indium (In), germanium (Ge) and gallium (Ga) or mixtures thereof in the fo...
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WO/2008/139412A1 |
A method for producing a metal from a metal sulphide ore or mineral is claimed. The metal sulphide ore is leached by non-oxidative dissolution in a chloride solution to produce a metal chloride solution and hydrogen sulphide; the metal c...
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WO/2008/135574A1 |
Method for producing hydrometallurgical zinc oxide powder having characteristics equivalent to that derived from a French process, comprising formation of an aqueous pulp from a starting zinc oxide having particles of nodular structure, ...
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WO/2008/117649A1 |
A method of recovering a valuable metal from an oxide-based scrap, characterized by using an insoluble electrode as an anode, using the oxide-based scrap as a cathode, and conducting electrolysis to recover the cathode scrap in the form ...
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WO/2008/052661A1 |
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 such as goethite and jarosite. A process fo...
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WO/2008/011788A1 |
A reduction retort (11) used in a vacuum metal refining reduction furnace comprises a retort (12), a condenser (13) arranged on one end of the retort, a charge end shield (14) hermetically connected to the condenser, and a discharge end ...
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WO/2008/004602A1 |
Disclosed is a molten salt electrolysis system comprising an electrolysis vessel (4) for holding a molten electrolytic bath containing a molten metal chloride and an electrode unit (1) to be immersed into the molten electrolytic bath. Th...
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WO/2007/116580A1 |
A method for recycling steelmaking dust which makes it possible at a low cost to reuse dust generated in steelmaking process as a raw material in steelmaking and which is particularly excellent in dezincing efficiency. A method which com...
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WO/2007/077290A1 |
The invention relates to a method for improving the leaching of a sulphidic concentrate that contains valuable metals in a hydrometallurgical fabrication process of said valuable metal. The purpose is to accelerate the oxidation of sulph...
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WO/2007/074360A2 |
A process is described for leaching a value metal from an ore containing said value metal, the process including the steps of leaching the ore in the presence of hydrochloric acid so as to form a soluble metal-chloride salt in a leach so...
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WO/2007/074207A1 |
Sulphidic zinc concentrate usually also includes small amounts of rare metals such as indium and gallium. If the content of these metals in the raw material is sufficiently high, their recovery may be economically worthwhile. In the meth...
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WO/2007/068025A2 |
Disclosed is a method for reprocessing metallurgical dust or grinding dust, especially converter dust and arc furnace dust obtained from steel or high-grade steel production. In said method, the dust is burned and slagged with oxygen in ...
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WO/2007/042604A1 |
The invention relates to a method for the sulphate-based leaching of metal sulphide minerals, such as chalcopyrite, CuFeS2, containing ore in atmospheric conditions. It is beneficial for the leaching of metal sulphides that the sulphide ...
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WO/2007/039664A1 |
The present invention relates to a new hydrometallurgical method for recovering nickel from nickel sulphide bearing raw materials, such as sulphide concentrate or ore. In general, the process involves the oxidative atmospheric pressure l...
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WO/2007/039663A1 |
The present invention relates to a new hydrometallurgical process for recovering nickel from nickel bearing raw materials, such as sulphide flotation concentrates. In general, the process involves the oxidative atmospheric pressure leach...
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WO/2007/034413A2 |
A process for the indirect bioleaching of zinc sulphide is disclosed, and includes leaching, solvent extraction, electrowinning, and oxidant regeneration steps in a closed circuit. The leaching step utilizes ferric iron as an oxidant, th...
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WO/2006/133777A1 |
The invention relates to the separation of metals in Fe-bearing zinc leaching residues, in particular neutral and weak acid leach residues. The process comprises the steps of : - preparing agglomerates containing, besides the Zn leaching...
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WO/2006/119611A1 |
The present invention is a method of recovering valuable metals from a quantity of furnace dust consisting the following steps. A first leaching step wherein the furnace dust is leached at atmospheric pressure in a first leaching solutio...
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WO/2006/079125A1 |
Liquid metal is continuously recovered by condensing metal vapour in a sealed system, more or less at atmospheric pressure, and collecting liquid metal in a crucible. The contents of the crucible are agitated and the temperature is contr...
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WO/2006/070052A1 |
The invention relates to a method, by means of which the valuable metals contained in a sulphidic, multicomponent concentrate are recovered using hydrometallurgical treatment. One constituent of the concentrate is copper sulphide, which ...
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WO/2006/041394A1 |
A method for recovery of metals or metal compounds from metal-bearing solid particles comprising volatile compounds comprises supplying the solid particles (50) through a flame (25) of a burner (20). The volatile compounds are then evapo...
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WO/2006/037777A1 |
The invention concerns a method for treating iron-and-steel plant sludge comprising adjusting the available CaO content of the sludge so as to obtain an available CaO content of 3 % to 8 % based on the sludge weight, adding a carbon-cont...
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WO/2006/027412A1 |
The invention is a novel process arrangement for producing pure zinc chemicals from the minor flow of a calcining-dissolving-electrolysis type of a preparation process of zinc. The invention is based on the fact that part of the producti...
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WO/2005/106053A1 |
Improved methods for treating metallurgical compositions involve reacting a metallurgical composition with an aqueous nitric acid solution. The reaction is performed at a pressure or at least about 220 psig and at a temperature of at lea...
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WO/2005/092528A1 |
A method for the treatment of a fly ash which comprises a process wherein a slurry of a fly ash is reacted with SO2, to thereby dissolve Ca and Zn in the fly ash into a solution, and these elements are separated from a residue containing...
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WO/2005/093107A1 |
A process for recovering a target metal from an oxidised metalliferous material comprises the steps of: - in a leaching stage, leaching the oxidised metalliferous material with an acidic aqueous halide solution to leach the target metal ...
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WO/2005/083134A1 |
The present invention relates to a process to recover zinc from zinc containing residues or scraps, especially those produced by hot-dip galvanizing lines. The process comprises the steps of: - selecting a Si-bearing compound which, at a...
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WO/2005/083133A1 |
A method is disclosed for analyzing, by the use of a computer system, the state of reaction in a region wherein the reduction of zinc oxide for forming zinc is carried out as a main reaction, in the inside of a blast furnace for the pyro...
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WO/2005/078146A1 |
A pyrometallurgy process for refining zinc, pig iron, coarse lead and coal gas, and the furnace thereof, which comprises upper electric furnace, intermediate bast furnace, lower main frequency furnace and oxygenerator and its other units...
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WO/2005/068669A1 |
A method of slag fuming wherein a slag containing arsenic or arsenic and antimony together with zinc and lead is heated and reduced in a slag fuming furnace, and zinc and lead are separated by evaporation, characterized in that it compri...
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WO/2005/068369A1 |
A distillation arrangement is presented, comprising a distillation conveyor (5) for transporting distillation material (15), and a heating arrangement (8) arranged to heat distillation material (15) in the distillation conveyor (5). The ...
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