| Patents for C22B 19 - Obtaining zinc or zinc oxide (2,969) |
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| 08/04/1987 | US4684450 Hydrometallurgy, electrochemistry, efficiency |
| 07/21/1987 | US4681535 Preheating mechanism for source metal for melt |
| 07/01/1987 | EP0227626A1 A method for manufacturing zinc hydrometallurgically |
| 06/30/1987 | US4676828 Process for the leaching of sulphides containing zinc and iron |
| 06/23/1987 | CA1223126A1 Process for recovering zinc from ferrites |
| 06/16/1987 | US4673431 Furnace dust recovery process |
| 06/02/1987 | US4670230 Using alkyl phosphoric acid compound and petroleum hydrocarbon diluent |
| 05/26/1987 | CA1222140A1 Method for recovery of zn and pb from iron and steel dust |
| 05/21/1987 | WO1987003010A1 Top submerged lancing reactor and direct smelting of zinc sulphide materials therein |
| 05/13/1987 | EP0221760A2 Method for recovering metal values from mixed-metal aqueous solutions by selective phosphate precipitation |
| 05/06/1987 | EP0220198A1 Preparing metal compounds by pyrolysis. |
| 04/30/1987 | DE3537852A1 Process for treating zinc- and lead-containing metallurgical slags |
| 04/23/1987 | DE3539164C1 Process and smelting furnace for producing non-ferrous metals |
| 04/23/1987 | DE3536635A1 Process and equipment for recovering especially iron as well as zinc, lead and other non-ferrous metal constituents from oxide materials of high iron content |
| 04/15/1987 | CN85107626A Process for the pressure oxidation of acid leaching of non-ferrous metal and iron-containing sulphide |
| 04/09/1987 | WO1987002068A1 Method for separation and recovery of metals from mixtures of metal sulfides such as lead ores |
| 04/08/1987 | EP0217139A1 Working up zinc- and lead-bearing residual materials obtained in steel making industryin view of a further metallurgical treatment |
| 04/07/1987 | US4655437 Vertical shaft with plasma arc that melts and vaporizes |
| 03/17/1987 | CA1219134A1 Process for the selective dissolution of lead from mixed minerals containing zinc |
| 03/12/1987 | EP0197071A4 Production of zinc from ores and concentrates. |
| 02/24/1987 | CA1218238A1 Method of processing sulphide copper and/or sulphide copper-zinc concentrates |
| 02/10/1987 | CA1217638A Hydrometallurgical method of recovering zinc, copper and cadmium from their ferrites |
| 02/04/1987 | EP0210387A1 Selective removal of metals from aqueous solutions with dithiophosphinic acids |
| 02/03/1987 | CA1217346A1 Hydrometallurgical recovery of metal values from copper containing sulphide materials |
| 01/21/1987 | CN85104711A Process for low carbon ratio smelting of zinc |
| 01/20/1987 | CA1216757A2 Recovery of zinc ammonium fluoride, zinc chloride, zinc sulfate and zinc nitrate from solid raw materials containing zinc and iron |
| 01/10/1987 | CN85101919A Method for recovering the metal values from materials containing tin and/or zinc |
| 01/06/1987 | CA1216157A1 Process for separately recovering zinc and lead values from zinc and lead containing sulphidic ore |
| 12/24/1986 | CN86103797A Condensation of zinc vapour |
| 11/19/1986 | CN86101735A Metallurgical composites and processes |
| 11/06/1986 | WO1986006361A1 Preparing metal compounds, alloys and metals by pyrolysis |
| 10/29/1986 | CN86102264A Smelting process |
| 10/21/1986 | CA1212841A1 Process for the recovery of zinc and production of hematite from zinc plant residues |
| 10/15/1986 | EP0197071A1 Production of zinc from ores and concentrates. |
| 10/07/1986 | CA1212242A1 Recovery of zinc from zinc-containing sulphidic material |
| 10/01/1986 | CN86100416A Apparatus for the pyrometallurgical processing of fine-grained solids to make molten products |
| 09/24/1986 | EP0195650A2 Recovery of zinc from zinc-bearing sulphidic ores and concentrates by controlled oxidation roasting |
| 09/16/1986 | US4612168 Process for refining brass and aluminum scraps |
| 09/16/1986 | US4612041 Process for recovering valuable metals from an iron dust containing a higher content of zinc |
| 09/16/1986 | CA1211292A1 Method for separating nonferrous metals from iron- oxide-containing residues |
| 09/10/1986 | EP0193976A1 Apparatus for the pyrometallurgical treatment of fine-granular solid materials to obtain fused products |
| 08/27/1986 | EP0192459A1 Recovery of base metal values from base metal and iron-bearing sulfide materials |
| 08/19/1986 | US4606765 Process for treating zinc-laden dust issuing from electric steel plant furnaces |
| 08/19/1986 | US4606763 Using autoclave with successive compartments the first being largest in size |
| 08/19/1986 | US4606760 Method and apparatus for simultaneously separating volatile and non-volatile metals |
| 07/16/1986 | EP0187194A2 Metal distillation method and apparatus utilizing double vaporization |
| 07/09/1986 | EP0186882A1 Solvent extraction process for recovery of zinc |
| 07/08/1986 | CA1207151A1 Process for selectively stripping iron ions from an organic solvent |
| 06/17/1986 | US4595574 Agglomerating carbonaceous substance and zinc compound, coating with calcium compound onto hearth layer in sintering apparatus, metallizing, vaporizing zinc in reducing atmosphere, oxidizing zinc vapor |
| 06/17/1986 | CA1206008A1 Recovery of zinc from zinc-containing sulphidic material |
| 05/13/1986 | US4588436 Method of recovering metals from liquid slag |
| 04/22/1986 | US4584054 Solids refining process |
| 04/10/1986 | WO1986002107A1 Production of zinc from ores and concentrates |
| 04/08/1986 | CA1203029A1 Treatment of solutions to facilitate the removal of ferric iron therefrom |
| 03/26/1986 | EP0175556A2 Process for the pressure oxidation leaching of non-ferrous metal containing sulphidic material |
| 03/25/1986 | US4578254 Process for the refining of sulfidic concentrates which contain arsenic, antimony and bismuth |
| 03/19/1986 | EP0174641A2 A process for recovering valuable metals from an iron dust containing a higher content of zinc |
| 03/10/1986 | CN85107417A Extraction of zinc from ores and concentrates |
| 02/25/1986 | US4572771 Leaching with hydrogen chloride, oxidizing with chlorine and solvent extraction |
| 02/18/1986 | US4571260 Smelting under oxidizing conditions then reduction |
| 02/18/1986 | CA1200702A1 Method of recovering metals from liquid slag |
| 02/11/1986 | CA1200396A1 Method of cleaning a gas flow containing zinc vapour |
| 02/04/1986 | US4568525 Method for the selective dissolution of lead from mixed minerals containing zinc |
| 02/04/1986 | CA1200074A1 Process for production of metal calcines of low sulfur content |
| 01/14/1986 | US4564387 Wet zinc dust atomization and distribution |
| 01/08/1986 | EP0167414A1 Process for the selective extraction of germanium |
| 01/07/1986 | US4563256 Alkylsalicyladoxime |
| 01/07/1986 | CA1198893A1 Apparatus for the separation of metallic zinc from residues containing zinc |
| 01/02/1986 | EP0166710A1 Process for leaching sulfides containing zinc and iron |
| 12/24/1985 | CA1198290A1 Process for the production of electrolytic zinc or high purity zinc salts from secondary zinc raw- materials |
| 11/12/1985 | US4552629 Leaching, filtration, oxidation, stripping circulation |
| 11/12/1985 | CA1196503A1 Condensing zinc vapour |
| 10/29/1985 | CA1195846A1 Recovery of zinc from zinc-containing sulphidic material |
| 10/22/1985 | US4548621 Condensing zinc vapor |
| 10/16/1985 | EP0158627A2 Process for recovering zinc and manganese from scrap containing zinc and manganese oxide originating from discharged zinc-carbon-manganese oxide batteries |
| 10/08/1985 | US4545963 Process for separately recovering zinc and lead values from zinc and lead containing sulphidic ore |
| 10/08/1985 | CA1194702A1 Process for recovering iron and zinc from steel- making dusts |
| 09/04/1985 | EP0153914A1 A method for recovering the metal values from materials containing tin and/or zinc |
| 08/27/1985 | CA1192362A1 Wet zinc dust atomization and distribution |
| 08/20/1985 | US4536214 Metal sulphide extraction |
| 08/13/1985 | CA1191813A1 Process for solution control in an electrolytic zinc plant circuit |
| 08/07/1985 | EP0150805A2 A method for recovering zinc from substances containing a zinc compound |
| 07/24/1985 | EP0148890A1 Metal sulphide extraction |
| 06/25/1985 | US4525208 Reduction and volaticlization into slag |
| 06/25/1985 | US4525207 Roasting zinc oxide containing material in fluidized bed and briquetting calcine |
| 06/04/1985 | US4521245 Flash smelting with basic silicate fluxes |
| 05/28/1985 | US4519836 Method of processing lead sulphide or lead-zinc sulphide ores, or sulphide concentrates, or mixtures thereof |
| 05/07/1985 | US4515696 Separation of residue after neutralization before precipitation |
| 04/30/1985 | US4514221 Reducing zinc calcine containing iron, silica, silver, gold and copper |
| 04/30/1985 | CA1186156A1 Segregation process for the purification of metals |
| 04/09/1985 | US4510028 Process for recovering zinc from zinc ferrite material |
| 04/02/1985 | US4508566 Method of cleaning a gas flow containing zinc vapor |
| 03/20/1985 | EP0134644A1 Process for the purification of zinc sulphate solutions |
| 03/19/1985 | US4505744 Recovery of zinc from zinc containing sulphidic material |
| 03/12/1985 | CA1183808A1 Wet-classifying method for recovery of carbon and iron-bearing particles |
| 01/31/1985 | WO1985000385A1 Metal sulphide extraction |
| 01/16/1985 | EP0131470A2 Zinc electrolyte treatment |
| 01/01/1985 | US4491470 Method for separating non-ferrous metals from ferruginous secondary substances |
| 12/18/1984 | US4488950 Heavy metal separation from copper-bearing wastes |
| 12/18/1984 | US4488905 Method of recovering volatile metals from material containing metal oxides |