| Patents for C22B 19 - Obtaining zinc or zinc oxide (2,969) |
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| 09/17/2008 | EP1970458A1 System for the in-situ treatment of molten zinc baths |
| 09/17/2008 | CN100419100C Treatment of iron-and-steel plant sludge in a multistage furnace |
| 09/17/2008 | CN100419099C A method for precipitating iron from a zinc sulphate solution as hematite |
| 09/10/2008 | EP1966401A1 Method for recovering rare metals in a zinc leaching process |
| 09/10/2008 | CN101260480A Distillation zinc smelting technique by using biomass charcoal as reducer |
| 09/10/2008 | CN100417753C Normal pressure zinc vapor oxidizing process for preparing four-needle zinc oxide whisker |
| 09/03/2008 | CN101255502A Process for comprehensive recovery of indium, cadmium, thallium and zinc from lead system smoke |
| 09/01/2008 | CA2623628A1 A process for separating iron from other metals in iron containing feed stocks |
| 08/27/2008 | EP1960556A2 Method for reprocessing metallurgical dust or grinding dust, and apparatus for carrying out said method |
| 08/26/2008 | US7416712 Extracting metals from arsenosulfidic and/or sulfidic cobalt and/or nickel ore or concentrate by conversion to cobalt monosulfide and/or nickel sulfide by sulfur or sulfur-containing arsenic compounds; sulfiding; leaching of soluble metals and rare earth elements |
| 08/21/2008 | US20080196551 Fume agglomerates in static bed; reduced iron bearing phase and zinc bearing fumes; high S content allows for relatively high operating temperature without production of molten phases; fast reduction and fuming kinetics, compact technology |
| 08/13/2008 | EP1954843A2 Leaching process in the presence of hydrochloric acid for the recovery of a value metal from an ore |
| 08/13/2008 | CN101240379A Method for directly smelting lead zinc sulfide ore by hydrogen |
| 07/30/2008 | CN100406593C Preparation of zinc chemicals from the minor flow of a process |
| 07/23/2008 | CN100404709C Graphite beating belt fast cooling type zinc smelting furnace |
| 07/19/2008 | CA2579394A1 Method for increasing metal production in smelter operations |
| 07/16/2008 | EP1468122B1 Method for the separation of zinc and nickel in the presence of chloride ions |
| 07/16/2008 | CN201087211Y Lower accepting type zinc smelting furnace |
| 07/16/2008 | CN101220416A Method for recycling copper from clean melt cinder of wet-process zinc metallurgy |
| 07/15/2008 | US7399454 Reacting with an aqueous nitric acid solution to non-ferrous metals into the solution which is in contact with solid ferric oxide wherein the metallurgical dust is an iron bearing hazardous waste, and wherein the solid ferric oxide is a non-hazardous waste |
| 07/09/2008 | CN101215643A Method and device for smelting low grade zinc lead material |
| 07/09/2008 | CN100400683C Method for producing metallic lead and zinc by using lead-zinc containing waste slag or lead-zinc monoxide mine |
| 07/02/2008 | EP1939310A1 Recovery of zinc from sulphide concentrates by atmospheric leaching with sulphuric acid at a controlled acidity |
| 06/19/2008 | US20080145289 Process For the Treatment of Electric and Other Furnace Dusts and Residues Containing Zinc Oxides and Zinc Ferrites |
| 06/18/2008 | CN201074243Y Smelting-furnace for crude zinc smelting |
| 06/18/2008 | CN100395356C Flotation zinc oxide concentrate wet method smelting process |
| 06/18/2008 | CN100395355C Method and apparatus for processing metalline sludge |
| 06/18/2008 | CN100395354C Comprehensive recovering process of multimetal sulfide mineral |
| 06/11/2008 | CN101195860A Method and device for washing wet-process zinc metallurgy output slag |
| 06/11/2008 | CN100393897C Process for removing chloride fromiznc electrolytic solution by using silver hydroxide |
| 06/04/2008 | CN101191159A Technique for extracting zinc from blast furnace gas mud by using rotary kiln |
| 06/04/2008 | CN101191150A Comprehensive utilization method for blast furnace gas mud and combustion furnace for processing |
| 06/04/2008 | CN100392123C Recovery of non-ferrous metals from zinc residues |
| 06/04/2008 | CN100392121C Method for reclaiming zinc and stannum from zinc stannum alloy by vacuum distillation |
| 05/22/2008 | US20080115626 Continuous operation at atmospheric pressure; using temperature control and aggitation to prevent solidification |
| 05/21/2008 | EP1923474A1 Large diameter ingots of nickel base alloys |
| 05/21/2008 | CN101184856A Process for the treatment of electric and other furnace dusts and residues containing zinc oxides and zinc ferrites |
| 05/14/2008 | CN100387733C Method of extractin zinc from low grade zinc ore |
| 05/08/2008 | WO2008052661A1 Recovery of non-ferrous metals from by-products of the zinc and lead industry using electric smelting with submerged plasma |
| 05/08/2008 | CA2668506A1 Recovery of non-ferrous metals from by-products of the zinc and lead industry using electric smelting with submerged plasma |
| 05/07/2008 | CN201056586Y Double-body and double-tower resistor electric arc zinc metallurgy stove |
| 05/07/2008 | CN101173326A Method for recovery utilization of acid waste liquid generated in waste lead acid accumulator lead -recovery process |
| 04/30/2008 | CN100385026C Removal of organic and inorganic carbonaceous materials from zinc silicate flotation concentrate and having additional effect of purifying the magnesium and water in process of zinc production |
| 04/23/2008 | CN201049960Y Horizontal zinc distillation furnace for removing metal cadmium, lead and iron from crude zinc |
| 04/23/2008 | CN100383264C Oxygen-enriched fuming Zn extraction process of plumbum smelting slag |
| 04/16/2008 | CN100381593C Method and device of refining separating zinc by bismuth method |
| 04/09/2008 | CN101157988A Method for purifying zinc sulfate solution |
| 04/09/2008 | CN101157987A Method for preparing electrolytic zinc by processing complex secondary zinc oxide material |
| 04/09/2008 | CN101157443A Method for preparing synchronously synthetic gas and metal zinc |
| 03/26/2008 | CN201040765Y Vacuum distillation furnace for crude zinc |
| 03/26/2008 | CN101148707A Zinc rectification method and zinc rectification furnace |
| 03/12/2008 | EP1597403B1 Method for recovery of zinc by countercurrent leaching |
| 03/12/2008 | CN100374592C Low pollution vanadium settling iron-removing wet zinc smelting method |
| 03/12/2008 | CN100374587C Method for reduction treatment of metal oxide or ironmaking waste, and method for concentration and/or recovery of zinc and/or lead |
| 03/05/2008 | EP1893779A1 Separation of metal values in zinc leaching residues |
| 03/05/2008 | CN101135008A High-heat direct reduction dezincing method for zinc-containing dust carbon-bearing briquette |
| 03/05/2008 | CN100372953C Regeneration process of zinc plated steel wire with drawing peeled-off zinc |
| 02/27/2008 | CN100371476C Method of slag fuming |
| 02/20/2008 | EP1434893B1 Zinc recovery process |
| 02/20/2008 | CN101128608A Metal vapour condensation and liquid metal withdrawal |
| 02/20/2008 | CN101126164A Method for producing electrolytic zinc from zinc material with high-content of fluorin and silicon dioxide |
| 02/20/2008 | CN100370043C Crude zinc smelting method and smelting furnace therefor |
| 02/19/2008 | CA2421780C Heat transfer in heap leaching of sulphide ores |
| 02/13/2008 | CN101122034A Method for extracting high-grade metal zinc powder from zinc-containing material |
| 02/06/2008 | CN101117666A Novel process for cooling of pyrogenic process zinc smelting |
| 02/06/2008 | CN100366769C Method for producing large diameter ingots of nickel base alloys |
| 02/06/2008 | CN100366315C Method and equipment for liquid-liquid extraction |
| 01/31/2008 | WO2008011788A1 A reduction retort, a preparation method thereof and a vacuum metal refining reduction furnace using the reduction retort |
| 01/30/2008 | CN201014924Y Zinc smelter |
| 01/30/2008 | CN101113493A Vacuum combined smelting method for high-christophite concentrate |
| 01/23/2008 | EP1880030A1 A process for the treatment of electric and other furnace dusts and residues containing zinc oxides and zinc ferrites |
| 01/17/2008 | US20080011123 Alkaline electro-hydrometallurgical process for Zn extraction from electric arc furnace dust |
| 01/16/2008 | EP1878806A2 Alkaline electro- hydrometallurgical process for Zn extraction from electric arc furnace dust |
| 01/16/2008 | CN100362118C Method and apparatus for controlling metal separation |
| 01/16/2008 | CN100361751C Method for floatation and recovery of lead zinc mixed concentrate from gold mine cyaniding slag tails |
| 01/10/2008 | WO2008004602A1 Electrolysis system and method |
| 01/09/2008 | EP1377690B1 Method for producing large diameter ingots of nickel base alloys |
| 01/09/2008 | CN100360694C Method of sintering and sinter bed compsn. |
| 01/02/2008 | CN100359026C Method and apparatus for removing copper, cadmium and cobalt from zinc sulfate solution |
| 12/27/2007 | US20070295613 Recovery Of Metals From Oxidised Metalliferous Materials |
| 12/26/2007 | CN101092664A Method for processing dust with zinc of electric furnace |
| 12/19/2007 | CN101090984A Method for the hydrometallurgical treatment of sulfide concentrate containing several valuable metals |
| 12/19/2007 | CN100355915C Method for increasing coked agglomeration strength by adding thin tar |
| 12/05/2007 | CN200985342Y Pyro-smelting zinc filtering condensator |
| 11/29/2007 | US20070273071 Method and Apparatus for Controlling Metal Separation |
| 11/28/2007 | CN101078053A Method for extracting metal indium, zinc and bismuth from blast furnace gas ash |
| 11/28/2007 | CN101078052A Method for synthetically reclaiming iron and non-ferrous metal from solid waste of iron and steel plant |
| 11/22/2007 | DE102006046879B3 Kathodenblech Cathode plate |
| 11/22/2007 | DE102006021315A1 Verfahren zur Verwertung von zinkhaltigen polymetallischen Stoffen und Vorrichtung zur Durchführung desselben The same process for the recovery of zinc-bearing polymetallic materials and device for carrying |
| 11/14/2007 | CN101072885A Leaching process in the presence of hydrochloric acid for the recovery of a value metal from an ore |
| 11/07/2007 | EP1851348A1 Metal vapour condensation and liquid metal withdrawal |
| 11/07/2007 | EP1454376B1 Recycling used electric cells by hydrometallurgical treatment |
| 11/07/2007 | CN101067166A 'Vacuum distillation' refining crude zinc |
| 11/01/2007 | US20070253878 Preparation of Zinc Chemicals from the Minor Flow of a Process |
| 10/31/2007 | CN101063182A Heavy-duty material inlay sintering process production technique |
| 10/25/2007 | WO2001016383A3 Process and solution |
| 10/24/2007 | CN200964432Y Zinc rectifying furnace |
| 10/24/2007 | CN200964431Y Crude zinc smelting furnace |
| 10/18/2007 | WO2007116580A1 Method for recycling steelmaking dust |
| 10/18/2007 | WO2007074360A3 Leaching process in the presence of hydrochloric acid for the recovery of a value metal from an ore |