| Patents for C22B 19 - Obtaining zinc or zinc oxide (2,969) |
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| 10/31/2002 | US20020159927 Leaching the complex sulfide material with hydrochloric acid, ferric chloride, and oxygen; precipitating iron from leach using lime and oxygen, removing copper, silver, lead etc. by cementation with zinc dust, precipitating ZNO using lime |
| 10/30/2002 | EP1252346A1 Method for reprocessing dust or dust mixtures |
| 10/30/2002 | EP1251940A2 A method for treatment of flue gas cleaning products |
| 10/29/2002 | US6471849 Process for the recovery of zinc from a zinc sulphide ore or concentrate |
| 10/16/2002 | EP1248863A1 Method to control manganese in zinc leach circuits |
| 10/15/2002 | US6464753 Furnace flue dust processing method |
| 10/10/2002 | WO2002079521A1 Method for recovering recyclable metals contained in solid residues from iron and steel industries by means of carbothermic reduction and distillation, in solid and liquid states |
| 10/09/2002 | EP1157139B1 Treatment of metal sulphide concentrates by roasting and arc furnace smelt reduction |
| 10/09/2002 | EP1105544B1 Method for producing zinc using the is process in an is shaft furnace |
| 10/03/2002 | WO2002020855A3 Pressure leaching process for zinc recovery from suphidic ore materials |
| 10/02/2002 | EP1245686A2 Method and apparatus for leaching zinc concentrates |
| 10/01/2002 | US6458184 Recovery of zinc from geothermal brines |
| 09/19/2002 | WO2002072897A1 Method for producing large diameter ingots of nickel base alloys |
| 09/19/2002 | WO2002072896A1 A method for the precipitation of silica in connection with zinc ore leaching |
| 09/19/2002 | WO2002072895A1 A method for the removal of calcium from a zinc process sulfate solution |
| 09/19/2002 | WO2002072894A1 Arrangement and method for reducing build-up on a roasting furnace grate |
| 09/19/2002 | CA2771264A1 Method for producing large diameter ingots of nickel base alloys |
| 09/19/2002 | CA2440858A1 A method for the precipitation of silica in connection with zinc ore leaching |
| 09/19/2002 | CA2439914A1 A method for the removal of calcium from a zinc process sulfate solution |
| 09/06/2002 | WO2002068701A2 Production of zinc oxide from complex sulfide concentrates using chloride processing |
| 08/29/2002 | WO2002066708A1 Method for electrolytic production of ultra-pure zinc or zinc compounds from zinc primary and secondary raw materials |
| 08/29/2002 | WO2002059386A8 Improved beneficiation process for concentration/calcination of zinc silicate ores and minerals |
| 08/28/2002 | EP1234062A2 Recovery of metals from ore by bioleaching with sulfur addition |
| 08/20/2002 | US6438154 Method and apparatus for recovering metal values from liquid slag an baghouse dust of an electric arc furnace |
| 08/08/2002 | WO2002006541A3 Production of zinc oxide from acid soluble ore using precipitation method |
| 08/01/2002 | WO2002059386A1 Improved beneficiation process for concentration/calcination of zinc silicate ores and minerals |
| 07/30/2002 | CA2093788C Method for extracting zinc present in liquid cast iron, and means for implementing such methods and products thus obtained |
| 07/23/2002 | US6423281 Adding a first fraction of a zinc oxide (zno)/ammonium chloride (nh4cl) solution to given amount of water to form an intermediate solution and zno precipitate, and the second fraction to the intermediate solution; from industrial waste |
| 07/11/2002 | WO2002053789A1 Method for eliminating and recovering zinc contained in compacted galvanized scrap and corresponding facility |
| 07/09/2002 | US6416564 Casting, annealing, melting |
| 07/04/2002 | US20020083795 Oxidizing the manganese constituent with a SO2/O2 mixture |
| 06/27/2002 | WO2002050320A1 Process for purifying zinc and rectifying column for purifying zinc |
| 06/27/2002 | WO2001098547A3 Method of processing zinc, cadmium and lead bearing furnace flue dust by heating in the presence of carbonaceous material |
| 06/26/2002 | CN2497261Y High temperature reduction furnace loading and slag-tapping machine |
| 06/25/2002 | US6409798 Process for recovering metal material from waste material |
| 06/18/2002 | US6406676 Hydrometallurgy with iron and arsenic ions, acidity, precipitation and oxidation |
| 06/12/2002 | EP1165845A4 Method and apparatus for removing undesirable metals from iron-containing materials |
| 06/11/2002 | US6401635 Liquid carton waste material recycling process and apparatus for recycling liquid carton waste material |
| 05/29/2002 | CN1085735C Zinc oxide as gray feed and its preparing process |
| 05/28/2002 | US6395242 Production of zinc oxide from complex sulfide concentrates using chloride processing |
| 05/28/2002 | US6395060 Furnace flue dust processing method |
| 05/23/2002 | WO2002040724A1 Method for reducing build-up on a roasting furnace grate |
| 05/23/2002 | WO2002040723A1 Method for the stabilization of a fluidized bed in a roasting furnace |
| 05/23/2002 | CA2427393A1 Method for reducing build-up on a roasting furnace grate |
| 05/21/2002 | US6391270 Method for removing manganese from acidic sulfate solutions |
| 05/16/2002 | US20020056951 Process and 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 |
| 05/14/2002 | US6387239 Contacting ore with microorganism which oxidizes sulfur; leaching; separation |
| 05/14/2002 | US6387154 Process for separating molten metals |
| 05/02/2002 | EP1200633A1 $i(THLASPI CAERULESCENS) SUBSPECIES FOR CADMIUM AND ZINC RECOVERY |
| 04/30/2002 | US6379421 Demetallization lead, zinc and cadmium from iron materials |
| 04/25/2002 | WO2002033136A1 Agglomerated elements and method for treating metallurgical dust |
| 04/24/2002 | EP1199373A1 Agglomerates of and process for the treatment of metallurgical dust |
| 04/24/2002 | EP1019554B1 Pyrometallurgical method and device for separating zinc and/or cadmium from lead in metallurgical residues |
| 04/24/2002 | EP0904419B1 Fluidized bed roasting process |
| 04/24/2002 | CN1083565C Dezincing induction melting system |
| 04/03/2002 | CN1082031C Method of biotreatment for solid materials in nonstirred surface bioreactor |
| 04/02/2002 | US6364930 Centrifugal separation achieving high degree of demixing; intermetallics in a galvanizing bath |
| 03/27/2002 | EP1189715A1 Zinc-based metal foamed bodies |
| 03/27/2002 | CN1081783C Method and furnace construction to be used in processes for producing easily volatile metals |
| 03/26/2002 | US6361753 Reacting calcium hydroxide at an elevated temperature and pressure under an inert atmosphere to produce essentially chlorine-free zinc oxide at substantially 100% yield. |
| 03/26/2002 | CA2356050C Process for the solvent extraction of nickel and cobalt values in the presence of magnesium ions from a solution |
| 03/26/2002 | CA2356048C Process for the recovery of nickel and/or cobalt from a concentrate |
| 03/19/2002 | CA2177766C Method and apparatus of treating dusts containing oxides |
| 03/14/2002 | WO2002020858A1 Method for recuperating metal elements from zinc-bearing raw materials using molten lead |
| 03/14/2002 | WO2002020855A2 Pressure leaching process for zinc recovery from suphidic ore materials |
| 03/13/2002 | EP1186677A2 Process for the separation and removal of iron ions from zinc oxide and basic zinc solution |
| 03/08/2002 | CA2357230A1 Process for separation and removal of iron ions from zinc oxide and basic zinc solution |
| 02/27/2002 | EP1042518B1 Oxidising elutriation of contaminated sludge containing iron with separation of zinc and lead |
| 02/13/2002 | EP1179605A1 Method of recovering sulfur from leach residues of sulfidic ore processing using distillation and condensation |
| 02/12/2002 | CA2032759C Method of reprocessing zinc- and lead-containing residues from metallurgical plants |
| 01/31/2002 | US20020011133 Furnace flue dust processing method |
| 01/29/2002 | CA2038767C Metallic vapor condenser capable of circulating a liquid metal |
| 01/24/2002 | WO2002006541A2 Production of zinc oxide from acid soluble ore using precipitation method |
| 01/23/2002 | CN1078115C One-step manufacture method for industrial high-purity zinc powder |
| 01/22/2002 | US6340450 Method for leaching zinc concentrate in atmospheric conditions |
| 01/22/2002 | CA2202289C Recovery of zinc from sulphidic concentrates |
| 01/16/2002 | CN1330985A Innocuous recovering process for waste dry battery |
| 01/15/2002 | US6338748 Hydrometallurgical method for recovery of zinc from electric arc furnace dust |
| 01/08/2002 | CA2221940C Chloride assisted hydrometallurgical extraction of nickel and cobalt from sulphide ores |
| 01/03/2002 | WO2001036693B1 Recovery of metals from ore by bioleaching with sulfur addition |
| 01/03/2002 | US20020001552 Treatment of roasted metal sulphide ores and ferrites by leaching with peroxysulphuric acid |
| 01/02/2002 | EP1165845A2 Method and apparatus for removing undesirable metals from iron-containing materials |
| 12/27/2001 | WO2001098547A2 Method of processing zinc, cadmium and lead bearing furnace flue dust by heating in the presence of carbonaceous material |
| 12/27/2001 | WO2001098546A1 Method for sulphuric acid treatment and recycling of blast furnace sludge |
| 12/19/2001 | EP0951573B1 Method for extracting non-ferrous metals such as zinc by electrolysis and by adding substances containing phosphor |
| 12/12/2001 | EP0783593B1 Method for recovering metal and chemical values |
| 12/05/2001 | CN1325460A Liquid carton waste material recycling process and apparatus for recycling liquid carton waste material |
| 12/04/2001 | US6325840 Process for treating by-products from zinc smelting and the like |
| 11/29/2001 | US20010046251 Method and apparatus for recovering metal values from liquid slag and baghouse dust of an electric arc furnace |
| 11/28/2001 | EP1157139A1 Treatment of metal sulphide concentrates by roasting and arc furnace smelt reduction |
| 11/28/2001 | CN1323909A Method of extracting zinc from zine slag |
| 11/22/2001 | WO2001056684A9 A method for treatment of flue gas cleaning products |
| 11/20/2001 | US6319483 Separating jarosite from other components of the solution and concentrating the gallium by dividing into solid and liquid fractions; |
| 11/15/2001 | WO2001036693A3 Recovery of metals from ore by bioleaching with sulfur addition |
| 11/14/2001 | CN1321783A Method for preparing high-purity zinc oxide by using smithsonite |
| 10/31/2001 | CN1074052C Iron removing method for liquid zinc |
| 10/31/2001 | CN1074051C Ruducer for pyrometallurgy of zinc |
| 10/24/2001 | CN1319143A Method for producing directly reduced metal in multi-tiered furnace |
| 10/16/2001 | US6302938 Reduced pellets |
| 10/10/2001 | EP1141424A1 Composition of oxime and hydroxy-ester for the solvent extraction of metals |