| Patents for C22B 19 - Obtaining zinc or zinc oxide (2,969) |
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| 09/13/2006 | EP1266042B1 Method for regulating a roasting furnace |
| 09/08/2006 | WO2006041695A3 Improved method for metal heap and dump leaching coupled with metal solvent extraction |
| 09/06/2006 | CN1829809A Method and apparatus for controlling metal separation |
| 09/06/2006 | CN1829808A Method and apparatus for processing metalline sludge |
| 08/30/2006 | CN2811904Y Non-ferrous metal vacuum distillation and separation furnace with external electromagnetic induction heater |
| 08/23/2006 | CN1823175A Mechanical separation of volatile metals at high temperatures |
| 08/23/2006 | CN1271224C Process for electrolytic production of highly pure zinc or zinc compounds from primary and secondary zinc raw materials |
| 08/17/2006 | US20060179977 Method for removing thallium from a zinc-containing solution |
| 08/16/2006 | EP1409753B1 Solvent extraction of impurities from concentrated metal sulphate solutions |
| 08/16/2006 | EP1339883B1 Method for the hydrolytic precitpitation of iron |
| 08/09/2006 | CN2804119Y Fast cold condensating metal molten purification furnace |
| 08/09/2006 | CN1814832A Vacuum-smelting zinc-oxide ore production technology |
| 08/02/2006 | CN1813075A Recovery of non-ferrous metals from zinc residues |
| 08/01/2006 | CA2394631C Method to control manganese in zinc leach circuits |
| 08/01/2006 | CA2295468C Separation and concentration method |
| 07/27/2006 | WO2006079125A1 Metal vapour condensation and liquid metal withdrawal |
| 07/27/2006 | CA2597467A1 Metal vapour condensation and liquid metal withdrawal |
| 07/26/2006 | EP1682687A1 Method for removing thallium from a zinc-containing solution |
| 07/26/2006 | EP1361296B1 Method for electrolytic production of ultra-pure zinc or zinc compounds from zinc primary and secondary raw materials |
| 07/25/2006 | CA2221781C Chloride assisted hydrometallurgical extraction of metal |
| 07/06/2006 | WO2006070052A1 Method for the hydrometallurgical treatment of sulfide concentrate containing several valuable metals |
| 07/06/2006 | CA2591887A1 Method for the hydrometallurgical treatment of sulfide concentrate containing several valuable metals |
| 07/05/2006 | CN1262678C Method for removing zinc and cobalt in cobalt dregs generated in zinc hydrometallurgy by using ultrasonic separation |
| 06/28/2006 | EP1373581B1 Reduction smelting method in a shaft furnace with recovery of volatile secondary metals |
| 06/21/2006 | EP1670960A1 Process and apparatus for recovery of non-ferrous metals from zinc residues |
| 06/21/2006 | EP1507878B1 Chloride assisted hydrometallurgical extraction of metals |
| 06/21/2006 | CN1789445A Method for separating copper, arsenic and zinc from copper-smelting high-arsenic flue dust sulphuric acid leach liquor |
| 06/15/2006 | US20060123952 Process and apparatus for extracting zinc |
| 06/14/2006 | CN1259436C A method for precipitation of silica in connection with zinc ore leaching |
| 06/07/2006 | EP1664358A1 Method and apparatus for controlling metal separation |
| 06/07/2006 | CN2786144Y Basket for zinc slag purification |
| 06/07/2006 | CN2786143Y Regenerative zinc crystallizer |
| 06/06/2006 | CA2246272C Process for recovery of zinc from sphalerite containing ores or concentrates |
| 05/31/2006 | CN1780923A Method for removing thallium from a zinc-containing solution |
| 05/31/2006 | CN1258009C ZnO nano crystal whisker material and its preparing method |
| 05/24/2006 | CN1777462A Method and equipment for liquid-liquid extraction |
| 05/24/2006 | CN1777461A Method and equipment for liquid-liquid extraction |
| 05/23/2006 | CA2208026C Chloride assisted hydrometallurgical copper extraction |
| 05/16/2006 | US7044996 Method for reducing build-up on a roasting furnace grate |
| 05/11/2006 | US20060096419 Method for reduction treatment of metal oxide or ironmaking waste and method for concentration and recovery zinc and/or lead |
| 04/26/2006 | CN1253612C Process for preparing zinc oxide crystal whisker |
| 04/26/2006 | CN1253589C Wet method for zinc refining without iron slag |
| 04/20/2006 | WO2006041394A1 A method and use of an apparatus for recovery of metals or metal compounds |
| 04/20/2006 | CA2580648A1 A method and use of an apparatus for recovery of metals or metal compounds |
| 04/19/2006 | CN1760384A Vacuum distillation method for separating zinc element from mixed metals in worn-out printing circuit board |
| 04/19/2006 | CN1252293C Reduction of zinc oxide from complex sulfide concentrates using chloride processing |
| 04/13/2006 | WO2006037777A1 Treatment of iron-and-steel plant sludge in a multistage furnace |
| 04/12/2006 | EP1645645A1 Treatment of steel plant sludges in a multi-stage furnace |
| 04/05/2006 | EP1641948A1 Recovery of non-ferrous metals from zinc residues |
| 04/05/2006 | CN2769801Y Zinc-smelting furnace |
| 04/05/2006 | CN1754971A Batchwise working-up recycling materials in a rotatable reactor |
| 04/05/2006 | CN1249257C Mtehod for hydrolytic precitpitation of iron |
| 03/22/2006 | EP1463586B1 Selective flotation agent and flotation method |
| 03/16/2006 | WO2006027412A1 Preparation of zinc chemicals from the minor flow of a process |
| 03/16/2006 | CA2577863A1 Preparation of zinc chemicals from the minor flow of a process |
| 03/07/2006 | US7008602 Preoxidation, reduction; acid leaching |
| 03/01/2006 | EP1629130A1 Mechanical separation of volatile metals at high temperatures |
| 03/01/2006 | CN1742104A Method for recovery of zinc by countercurrent leaching |
| 03/01/2006 | CN1740352A High vacuum in-situ two-step refining process for high purity material |
| 02/23/2006 | US20060037437 Non-pollution process of extracting arsenic in vacuum and the equipment thereof |
| 02/15/2006 | EP1626098A2 Process of dissolving zinc in alkaline brines |
| 02/15/2006 | CN1733949A Zinc oxide raw ore fluidization leaching process |
| 02/15/2006 | CN1733948A Flotation zinc oxide concentrate wet method smelting process |
| 02/15/2006 | CN1242075C Apparatus and method for recycling iron containing dust and sludge in puddling process using coal and fine iron ore |
| 02/08/2006 | EP1370699B1 A method for the precipitation of silica in connection with zinc ore leaching |
| 02/08/2006 | EP1165845B1 Method and apparatus for removing undesirable metals from iron-containing materials |
| 02/08/2006 | CN1730683A High Iron zinc calcine process method |
| 02/01/2006 | CN1239720C Method for producing high purity metal zinc from zinc oxide ore |
| 01/25/2006 | EP1453985B1 A method for precipitating iron from a zinc sulphate solution as hematite |
| 01/25/2006 | CN1238537C Method for producing low-stacking density nano-zinc oxide by ammonia leaching method |
| 01/18/2006 | EP1377690A4 Method for producing large diameter ingots of nickel base alloys |
| 01/12/2006 | US20060005665 Process for extracting gold in arsenic-containing concentrate of gold and the equipment thereof |
| 01/11/2006 | CN1236225C Method for regulating roasting furnace |
| 01/11/2006 | CN1236081C Leaching process of zinc oxide ore |
| 01/11/2006 | CN1236080C Wet separation process of waste ZnCuNi alloy |
| 01/04/2006 | CN1715430A Process for separating zinc from rare-earth and preparing basic zinc carbonate |
| 12/29/2005 | US20050284261 Batchwise working-up recycling materials in a rotatable reactor |
| 12/28/2005 | EP1609877A1 Batchwise working-up recycling materials in a rotatable reactor |
| 12/28/2005 | EP1366201B1 A method for the removal of calcium from a zinc process sulfate solution |
| 12/28/2005 | CN1714163A Process and apparatus for extracting zinc |
| 12/28/2005 | CN1233860C Vacuum arsenic extracting method and system without pollution |
| 12/21/2005 | EP1257674B1 Method for upgrading steel plant dust |
| 12/14/2005 | CN2745938Y Bottom reflux evaporation tray |
| 12/14/2005 | CN1231606C Technique for integrated treatment for fuming of dregs of lead/stibium blast furnace |
| 12/14/2005 | CN1231297C Multi-condensed jet-flow spray gun |
| 12/07/2005 | CN1230564C A method for removal of calcium from zinc frocess sulfate solution |
| 11/23/2005 | EP1597403A1 Method for recovery of zinc by countercurrent leaching |
| 11/22/2005 | CA2437549C Production of zinc oxide from complex sulfide concentrates using chloride processing |
| 11/10/2005 | WO2005106053A1 Iron oxide precipitation from acidic iron salt solutions |
| 11/03/2005 | US20050241439 Metallurgical dust reclamation process |
| 11/02/2005 | EP1591546A1 Process of recovering metals and/or metal oxides from steelworks dusts |
| 10/27/2005 | WO2005047551A8 Method for removing thallium from a zinc-containing solution |
| 10/12/2005 | CN1681949A Method for reduction treatment of metal oxide or ironmaking waste, and method for concentration and/or recovery of zinc and/or lead |
| 10/06/2005 | WO2005093107A1 Recovery of metals from oxidised metalliferous materials |
| 10/06/2005 | WO2005092528A1 Method for treatment of fly ash using sulfur dioxide |
| 10/06/2005 | CA2560594A1 Recovery of metals from oxidised metalliferous materials |
| 10/05/2005 | EP1263995B1 Method of sintering and sinter bed composition |
| 10/05/2005 | CN1678764A 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 |
| 10/05/2005 | CN1676633A Method for increasing coked agglomeration strength by adding thin tar |
| 10/05/2005 | CN1221674C Method for extracting gold from arsenic and gold contained headings |