| Patents for C22B 19 - Obtaining zinc or zinc oxide (2,969) |
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| 10/09/2003 | US20030188603 Comprises mixing blast-furnace sludge with iron-oxide containing powder, agglomerating, feeding into continuous hearth, then heating to remove zinc |
| 10/08/2003 | EP1350856A2 Method for making reduced iron using blast-furnace sludge |
| 10/01/2003 | CN1445381A Method for recovering catalytic metal using porous metal filter |
| 09/24/2003 | CN1122111C Method for preparing high purity zine oxide by using smithsonite |
| 09/03/2003 | EP1339882A1 Method for reducing build-up on a roasting furnace grate |
| 09/03/2003 | EP1339881A1 Method for the stabilization of a fluidized bed in a roasting furnace |
| 09/03/2003 | CN2570302Y Full-closed type gas fire method zinc smelting furnace |
| 08/28/2003 | US20030159540 Exposure of raw materials to reducing agent; forming gaseous zinc; then oxidation; using electric arc furnaces |
| 08/20/2003 | EP1252346B1 Method for reprocessing dust or dust mixtures |
| 08/14/2003 | WO2003066910A1 Processing electric arc furnace dust through a basic oxygen furnace |
| 08/14/2003 | US20030150815 Process for preparing iron free zinc oxide |
| 08/14/2003 | US20030150293 Apparatus for enhanced purification of high-purity metals |
| 08/13/2003 | EP1335032A1 Vacuum distillation method and apparatus for enhanced purification of high-purity metals like indium |
| 08/13/2003 | EP1335030A1 High purity metals, process and apparatus for producing them by enhanced purification |
| 08/07/2003 | US20030145684 Solidification, entrainment zones; vapor passageway plates; recirculation of melts |
| 08/07/2003 | US20030145683 Method and apparatus for enhanced purification of high-purity metals |
| 08/06/2003 | EP1258535B1 Process for electrolytic production of highly pure zinc or zinc compounds from primary and secondary zinc raw materials |
| 08/05/2003 | US6602322 Mixing metal-containing dust and carbonaceous fines to form a particulate mixture; heating to reduce and release volatile metals and alkali metals therefrom along with gaseous products; collecting released metals and gases, reoxidizing |
| 07/31/2003 | WO2003062478A1 Method for the separation of zinc and a second metal which does not form an anionic complex in the presence of chloride ions |
| 07/31/2003 | WO2003031334A3 Assemblies and methods for processing zing-bearing materials |
| 07/30/2003 | EP1141424B1 Composition of oxime and hydroxy-ester for the solvent extraction of metals |
| 07/30/2003 | EP1070150B1 Method for treating steel works dust by wet process |
| 07/23/2003 | CN1431074A Method for producing zinc powder and its mfg. device |
| 07/16/2003 | EP1263995A4 Method of sintering and sinter bed composition |
| 07/10/2003 | WO2003056039A1 An apparatus and method for recycling dust and sludge containing iron in ironmaking process using coal and fine ore |
| 07/09/2003 | EP1325164A2 Pressure leaching process for zinc recovery from sulphidic ore materials |
| 07/09/2003 | CN1428444A Slagging agent |
| 07/09/2003 | CN1428443A Zinc alterant |
| 07/09/2003 | CN1428442A 锌精炼剂 Zinc refining agent |
| 07/03/2003 | US20030122289 Roaster with stabilized fluidized bed for roasting zinc concentrate |
| 07/02/2003 | EP1119645B1 Process and apparatus for recovering metal material from waste material |
| 06/25/2003 | EP1259652A4 Process and apparatus for recovery of cyanide and metals |
| 06/19/2003 | WO2003025234A3 Method for obtaining cobalt and nickel from ores and ore concentrates |
| 06/18/2003 | EP1319727A2 Pyro-hydrometallurgical process for the recovery of zinc, lead and other value metals from iron- and steelmaking shop dusts |
| 06/18/2003 | CN1424552A Preheating energy-saving systems for zinc vapor condensing recovery |
| 06/17/2003 | CA2127277C Method for the recovery of zinc oxide |
| 06/12/2003 | WO2003048398A1 Method of and apparatus for condensing metallic vapours |
| 06/11/2003 | CN2555493Y Novel splash condenser rotor |
| 06/05/2003 | WO2003046232A1 Integration processes of the treatments of zinc silicate concentrates or zinc silicate ore and roasted concentrates of zinc sulphides |
| 06/05/2003 | US20030105380 Preparing an aqueous suspension of the solid or semisolid waste material, separating the solid and liquid material to obtain solid waste and liquid waste solution, collecting solid waste, repeating above steps, acidifying liquid waste |
| 06/04/2003 | EP0771370B1 Process for electrochemically dissolving a metal such as zinc or tin |
| 06/04/2003 | CN1421535A Regeneration process of zinc residue produced in hot zinc plating |
| 05/28/2003 | EP1314788A2 A method for recovering catalytic metals using a porous metal filter |
| 05/28/2003 | CN1420186A Process for separating zinc and lead from metallurgic furnace dust |
| 05/15/2003 | US20030089619 Process and apparatus for recovery of cyanide and metals |
| 05/15/2003 | US20030089201 Bio-oxidizing the sulphidic ore with acidophilic microorganisms by providing air to the bottom of the heap, irrigating the top of the heap with a sulphuric acid solution, then solvent extraction, electrowinning |
| 05/14/2003 | CN1418258A Method for regulating roasting furnace |
| 05/13/2003 | US6562101 Processing electric arc furnace dust through a basic oxygen furnace |
| 05/07/2003 | CN1416475A Method of sintering and sinter bed compsn. |
| 04/30/2003 | CN1415022A Process for electrolytic production of highly pure zinc or zinc compounds from primary and secondary zinc raw materials |
| 04/30/2003 | CN1413911A Process for preparing high-purity Nano-class zinc oxide |
| 04/17/2003 | WO2003031666A1 Chloride melt process for the separation and recovery of zinc |
| 04/17/2003 | WO2003031334A2 Assemblies and methods for processing zing-bearing materials |
| 04/17/2003 | CA2460883A1 Chloride melt process for the separation and recovery of zinc |
| 04/01/2003 | CA2222900C Method of biotreatment for solid materials in a nonstirred surface bioreactor |
| 03/27/2003 | WO2003025234A2 Method for obtaining cobalt and nickel from ores and ore concentrates |
| 03/27/2003 | CA2460116A1 Method for obtaining cobalt and nickel from ores and ore concentrates |
| 03/26/2003 | CN1405340A Molten metal distillation apparatus |
| 03/25/2003 | CA2199268C Method for recovering metal and chemical values |
| 03/20/2003 | WO2003023077A1 Zinc recovery process |
| 03/19/2003 | EP1292716A2 Method of processing zinc, cadmium and lead bearing furnace flue dust by heating in the presence of carbonaceous material |
| 03/19/2003 | CN1404529A Method for upgrading steel plant dust |
| 03/18/2003 | US6533990 Apparatus for distilling molten baths |
| 03/13/2003 | WO2003021708A2 Recycling used electric cells by hydrometallurgical treatment |
| 03/13/2003 | WO2003020989A1 High temperature metal recovery process |
| 03/13/2003 | US20030047035 High temperature metal recovery process |
| 03/12/2003 | CN2539748Y Interlink ring protection for smelting crude zinc using canned powder pyrogenic method |
| 03/06/2003 | US20030041693 Agglomerating and sintering iron and zinc ore and ore concentrates, steel mill ferrous waste and zinc mill waste, includes mixing with agglomeration agent sodium silicate, water soluble polymers, or aqueous emulsions of oils |
| 03/06/2003 | US20030041692 Method and apparatus for leaching zinc concentrates |
| 03/05/2003 | CN1401010A Method for reprocessing dust or dust mixtures |
| 02/20/2003 | WO2002040724A8 Method for reducing build-up on a roasting furnace grate |
| 02/18/2003 | CA2214611C Method for processing zinc silicate-containing zinc crude material |
| 02/13/2003 | US20030031611 Production of zinc oxide from acid soluble ore using precipitation method |
| 02/12/2003 | EP1283273A2 Apparatus for distilling molten metal |
| 02/11/2003 | US6517789 Method for reclaiming constituents from an industrial waste stream |
| 02/06/2003 | US20030025253 Apparatus for distilling molten baths |
| 02/04/2003 | US6514457 Extraction of impurities from structures containing mercury, cadmium, zinc, or tellurium, and impurities |
| 02/04/2003 | US6514414 Process for separation and removal of iron ions from basic zinc solution |
| 01/23/2003 | WO2003006696A1 Heap bioleaching process for the extraction of zinc |
| 01/16/2003 | US20030012716 Solvent extraction using an organic solution of an oxine i.e. an 8-hydroxy quinoline and substituted 8-hydroxy quinoline that may be alkyl or alkylene-substituted. |
| 01/16/2003 | US20030010268 Method for regulating a roasting furnace |
| 01/16/2003 | US20030010156 Method for upgrading steel plant dust |
| 01/01/2003 | CN1388258A Prepn process of zinc for mercury-free battery |
| 12/31/2002 | US6500229 Method for treating steel works dust by wet process |
| 12/24/2002 | CA2028324C Method for the solvent extraction of zinc |
| 12/18/2002 | EP1266042A1 Method for regulating a roasting furnace |
| 12/17/2002 | US6494933 Method of utilizing secondary raw materials containing iron, zinc and lead |
| 12/17/2002 | CA2215963C Atmospheric mineral leaching process |
| 12/12/2002 | DE10134286C1 Device for distilling molten metal comprises a pot-like lower housing part for receiving a melt crucible and an upper housing part connected to the lower housing part |
| 12/11/2002 | EP1263995A1 Method of sintering and sinter bed composition |
| 12/04/2002 | CN1382814A Smelting method for separating Cu, Zn and Co from each other |
| 11/27/2002 | EP1259652A1 Process and apparatus for recovery of cyanide and metals |
| 11/27/2002 | CN2522430Y Low-investment high-recovery environment-protection energy-saving zinc-smelting equipment |
| 11/27/2002 | CN1382227A Production of zinc oxide from complex sulfide concentrates using chloride processing |
| 11/21/2002 | WO2002092513A1 Method for producing zinc oxide and device for carrying out said method |
| 11/21/2002 | US20020170386 Large diameter ingots of nickel base alloys |
| 11/20/2002 | EP1258535A1 Process for electrolytic production of highly pure zinc or zinc compounds from primary and secondary zinc raw materials |
| 11/20/2002 | EP1257674A1 Method for upgrading steel plant dust |
| 11/05/2002 | US6475450 Method of leaching zinc concentrate |
| 10/31/2002 | WO2002068701A3 Production of zinc oxide from complex sulfide concentrates using chloride processing |