| Patents for C22B 19 - Obtaining zinc or zinc oxide (2,969) |
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| 10/04/2005 | US6951960 Complexing amine with metal; stripping; regeneration amine with hydrochloric acid |
| 09/29/2005 | US20050211631 Method for the separation of zinc and a second metal which does not form an anionic complex in the presence of chloride ions |
| 09/14/2005 | CN1668771A Method for obtaining cobalt and nickel from ores and ore concentrates |
| 09/14/2005 | CN1219085C Zinc alterant |
| 09/14/2005 | CN1219084C Process for separating zinc and lead from metallurgic furnace dust |
| 09/09/2005 | WO2005083134A1 Recycling of hot-dip zinc galvanizing bath |
| 09/09/2005 | WO2005083133A1 Method for analyzing state inside blast furnace in pyrometallurgy of zinc and method for zinc smelting |
| 09/07/2005 | EP1434892B1 Chloride melt process for the separation and recovery of zinc |
| 09/07/2005 | CN1665944A Metallurgy extraction method by wet method with chloride assistance |
| 09/07/2005 | CN1664134A Process for extracting zinc and indium from low-grade zinc concentrates by wet method |
| 09/01/2005 | US20050188787 Allows the treatment of Waelz residues producing an inert process slag, a sellable liquid metal and powders which can be treated with the hydrometallurgic process, for the recovery of lead, zinc or other metals |
| 08/31/2005 | CN1217020C Arrangement and method for reducing build-up on a roasting furnace grate |
| 08/31/2005 | CN1217019C Method for reducing build-up on roasting furnace grate |
| 08/25/2005 | WO2005078146A1 A zinc refining process with oxygen-enriched and the enclosed smelting furnace thereof |
| 08/24/2005 | EP1566455A1 A pyrometallurgic process for the treatment of steelwork residues,especially Waelz process residues |
| 08/24/2005 | EP1565585A1 Process and apparatus for extracting zinc |
| 08/23/2005 | US6932853 Recovering zinc from a metal waste, using a cyclone separator to separate, filtration, heating to evaporate, oxidation, recovering volatile zinc from electric arc furnace dust; demetallization, purification, |
| 08/23/2005 | US6932852 Method and apparatus for enhanced purification of high-purity metals |
| 08/16/2005 | CA2415732C Production of zinc oxide from acid soluble ore using precipitation method |
| 08/10/2005 | EP1561829A1 Method for reduction treatment of metal oxide or ironmaking waste, and method for concentration and/or recovery of zinc and/or lead |
| 08/09/2005 | US6926752 Method for the stabilization of a fluidized bed in a roasting furnace |
| 07/28/2005 | WO2005068669A1 Method of slag fuming |
| 07/28/2005 | WO2005068369A1 Distillation arrangement comprising a distillation conveyor |
| 07/27/2005 | CN1644720A Oxygen-enriched zinc smelting method |
| 07/27/2005 | CN1212412C 锌精炼剂 Zinc refining agent |
| 07/26/2005 | US6921474 Chloride melt process for the separation and recovery of zinc |
| 07/19/2005 | US6918947 Method for making reduced iron |
| 07/14/2005 | WO2005001146A3 Method for conditioning slags and dust |
| 07/13/2005 | CN1639360A Method for the separation of zinc and a second metal which does not form an anionic complex in the presence of chloride ions |
| 07/07/2005 | WO2005012581A3 Methods for improving the recovery of metal leaching agents |
| 07/06/2005 | CN1209218C Zinc powder preparation device |
| 06/29/2005 | CN1632144A Method for saving coal by adding additives in zinc smelting |
| 06/21/2005 | CA2289279C Method for recycling brass foundry waste |
| 05/26/2005 | WO2005047551A1 Method for removing thallium from a zinc-containing solution |
| 05/26/2005 | US20050112041 Method for producing higher purity zinc oxide |
| 05/19/2005 | WO2005045078A1 A method for the removal of copper from a zinc sulphate solution |
| 05/18/2005 | EP1325164B1 Pressure leaching process for zinc recovery from sulphidic ore materials |
| 05/10/2005 | CA2385775C Production of zinc oxide from complex sulfide concentrates using chloride processing |
| 05/06/2005 | WO2005040437A1 Method of wet treatment of fly ash |
| 04/27/2005 | CN2695448Y Bottom collecting type zinc smelting furnace |
| 04/21/2005 | US20050083988 System and method of processing electric arc furnace dust |
| 04/19/2005 | CA2347552C Recovery of zinc from galvanized coatings |
| 04/12/2005 | US6878356 Recovery of zinc from galvanized coatings |
| 04/07/2005 | WO2005031014A1 Process and apparatus for recovery of non-ferrous metals from zinc residues |
| 04/07/2005 | CA2539166A1 Process and apparatus for recovery of non-ferrous metals from zinc residues |
| 04/06/2005 | CN1603433A Dressing and smelting united technology for processing refractory copper zinc ore mixtures |
| 03/31/2005 | US20050069473 Integration processes of the treatments of zinc silicate concentrates or zinc silicate ore and roasted concentrates of zinc sulphides |
| 03/31/2005 | US20050066773 Heap bioleaching process for the extraction of zinc |
| 03/30/2005 | EP1425428B1 Method for obtaining cobalt and nickel from ores and ore concentrates |
| 03/30/2005 | EP1248863B1 Method to control manganese in zinc leach circuits |
| 03/22/2005 | US6869520 Process for the continuous production of high purity electrolytic zinc or zinc compounds from zinc primary or secondary raw materials |
| 03/08/2005 | US6863873 Process to produce simonkolleite, zinc oxide and zinc hydroxide |
| 03/02/2005 | EP1292716B1 Method of processing zinc, cadmium and lead bearing furnace flue dust by heating in the presence of carbonaceous material |
| 02/23/2005 | EP1507878A1 Chloride assisted hydrometallurgical extraction of metals |
| 02/16/2005 | CN1189578C Production of zinc oxide from complex sulfide concentrates using chloride processing |
| 02/10/2005 | WO2005012581A2 Methods for improving the recovery of metal leaching agents |
| 02/10/2005 | US20050031512 Clarifying a first aqueous leach pulp by solid-liquid separation and solvent extraction to obtain a raffinate and a second aqueous leach pulp; diluted separation and extraction of the second pulp; pollution control |
| 02/09/2005 | CN1188533C Smelting method for separating Cu, Zn and Co from each other |
| 02/09/2005 | CN1188532C Method for reprocessing dust or dust mixtures |
| 02/03/2005 | WO2005010221A1 Method and apparatus for controlling metal separation |
| 02/03/2005 | CA2532578A1 Method and apparatus for processing metalline sludge |
| 02/03/2005 | CA2531772A1 Method and apparatus for controlling metal separation |
| 01/27/2005 | WO2005007900A1 A process for upgrading an ore or concentrate |
| 01/27/2005 | CA2533024A1 A process for upgrading an ore or concentrate |
| 01/26/2005 | EP1499752A2 Sulfuric acid beneficiation of titaniferous ore for the production of tio2 |
| 01/26/2005 | CN1571853A Combination method for processing zinc silicate concentrate or mine and zinc sulphide calcined concentrate |
| 01/26/2005 | CN1571852A Zinc recovery process |
| 01/25/2005 | US6846346 Sulfatization process for metal extraction from sulfide ores |
| 01/20/2005 | WO2005005674A1 Recovery of non-ferrous metals from zinc residues |
| 01/19/2005 | EP1434893A4 Zinc recovery process |
| 01/19/2005 | CN1566417A Process for preparing zinc oxide crystal whisker |
| 01/19/2005 | CN1566379A Copper-zinc separation method during smelting in a blast furnace |
| 01/18/2005 | US6843976 Reduction of zinc oxide from complex sulfide concentrates using chloride processing |
| 01/13/2005 | WO2005003397A1 Mechanical separation of volatile metals at high temperatures |
| 01/13/2005 | US20050006247 Chloride melt process for the separation and recovery of zinc |
| 01/13/2005 | CA2530527A1 Mechanical separation of volatile metals at high temperatures |
| 01/06/2005 | WO2005001146A2 Method for conditioning slags and dust |
| 01/05/2005 | CN2668647Y Apparatus for producing zinc oxide through indirect method by muffle reflection furnace |
| 01/05/2005 | CN1561401A Chloride melt process for the separation and recovery of zinc |
| 01/04/2005 | US6838045 Apparatus for metal purification |
| 12/30/2004 | US20040261577 Recovering zinc from a metal waste, using a cyclone separator to separate, filtration, heating to evaporate, oxidation, recovering volatile zinc from electric arc furnace dust; demetallization, purification, |
| 12/29/2004 | CN1182264C Method for producing zinc using IS shaft furnace and corresponding IS shaft furnace |
| 12/28/2004 | US6835230 Hydrometallurgical zinc production process from sulfides, where ferric ion consumed by leaching is regenerated for reuse by introducing oxygen into the post-leaching solution flowing through feed pipes; shortens the leach time |
| 12/28/2004 | US6835228 Process of recovering valuable metals from waste secondary batteries |
| 12/22/2004 | EP1339881B1 Method for the stabilization of a fluidized bed in a roasting furnace |
| 12/22/2004 | CN1181213C Regeneration process of zinc residue produced in hot zinc plating |
| 12/15/2004 | CN1555422A Reduction of zinc oxide from complex sulfide concentrates using chloride processing |
| 12/14/2004 | US6831939 Dual use of an induction furnace to produce hot metal or pig iron while processing iron and volatile metal containing materials |
| 12/08/2004 | CN1179057C Method for upgrading steel plant dust |
| 12/02/2004 | US20040237720 Zinc recovery process |
| 12/01/2004 | EP0973953B1 Device for precipitating compounds from zinc metal baths by means of a hollow rotary body that can be driven about an axis and is dipped into the molten zinc |
| 11/23/2004 | CA2221930C Chloride assisted hydrometallurgical extraction of metal |
| 11/23/2004 | CA2196981C Hydrometallurgical conversion of zinc sulfide to sulfate from zinc sulfide containing ores and concentrates |
| 11/10/2004 | EP1129225B1 Sulfatisation process for metal extraction from sulfide ores |
| 11/09/2004 | US6814779 Process for producing high-purity metals |
| 11/09/2004 | US6814571 Arrangement and method for reducing build-up on a roasting furnace grate |
| 11/02/2004 | CA2154560C Hydrometallurgical recovery of metals from complex ores |
| 10/27/2004 | EP1234062B1 Recovery of metals from ore by bioleaching with sulfur addition |
| 10/27/2004 | CN1540006A Technique for integrated treatment for fuming of dregs of lead/stibium blast furnace |
| 10/27/2004 | CN1172756C Innocuous recovering process for waste dry battery |