| Patents for C22B 19 - Obtaining zinc or zinc oxide (2,969) |
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| 12/18/1984 | US4488904 Method and apparatus for retrieving metallic vapor in the liquid phase using pool of molten retrieving metal |
| 12/11/1984 | US4487628 Selective reduction of heavy metals |
| 11/14/1984 | EP0124634A1 Method and apparatus for retrieving metallic vapor in the liquid phase using pool of molten retrieving metal |
| 11/13/1984 | US4482377 Reaction with alkali metal busulfate |
| 11/06/1984 | US4480797 Installation for treatment of waste metal and liquid dross |
| 11/06/1984 | CA1177257A1 Method for processing sulphidic zinc ores |
| 10/30/1984 | CA1176853A1 Process for recovering zinc from zinc ferrite material |
| 10/16/1984 | US4477323 Crystallization of ferrous sulfate hydrate from leaching liquor |
| 10/09/1984 | US4475993 Extraction of trace metals from fly ash |
| 10/09/1984 | CA1175664A1 Process for the treatment of a raw material which contains oxide and ferrite of zinc, copper and cadmium |
| 09/18/1984 | CA1174475A1 Hydrometallurgical process for the treatment of a raw material which contains oxide and ferrite of zinc, copper and codmium |
| 09/05/1984 | EP0117325A1 A method of zinc smelting by injection smelting |
| 07/18/1984 | EP0113580A2 Heavy metal separation from copper-bearing wastes |
| 06/26/1984 | US4456480 Controlled cooling, compaction, and remelting to form crystal layer between purified metal and impurities |
| 06/26/1984 | US4456230 Apparatus for the separation of metallic zinc from residues containing zinc |
| 06/26/1984 | CA1169662A1 Method for recovering useful metals from dust discharged from metal refining metallurgical furnace |
| 06/19/1984 | CA1169247A1 Apparatus for refining molten aluminum |
| 05/08/1984 | US4447261 Layering granular wastes and sintering mixture of iron oxide and carbonaceous fuel, then combustion |
| 05/02/1984 | EP0107401A1 Process for separately recovering zinc and lead values from zinc- and lead-containing sulphidic ore |
| 04/24/1984 | CA1166022A1 Recovery of zinc from zinc containing sulphidic material |
| 04/24/1984 | CA1166021A1 Removal of manganese and chlorine ions from aqueous acidic zinc sulphate solutions |
| 04/17/1984 | US4443253 Recovery of zinc from zinc containing sulphidic materials |
| 04/03/1984 | US4440569 Recovery of zinc from zinc-containing sulphidic material |
| 03/27/1984 | US4439288 Process for reducing Zn consumption in zinc electrolyte purification |
| 03/20/1984 | US4437953 Process for solution control in an electrolytic zinc plant circuit |
| 03/14/1984 | EP0102725A2 Recovery of metal value from sulphide materials |
| 03/07/1984 | EP0102299A1 Process for the selective dissolution of lead |
| 03/06/1984 | US4435368 Hydrometallurgical process for selective dissolution of mixtures of oxy compounds |
| 03/06/1984 | CA1163382A1 Process of treating dust containing zinc and lead and derived in an iron or steel making process |
| 02/08/1984 | EP0100237A2 Recovery of zinc from zinc-containing sulphidic material |
| 01/10/1984 | US4425228 Wet-classifying method for recovery of carbon and iron-bearing particles |
| 12/28/1983 | EP0097144A1 Process for separating non ferrous metals from residues containing iron oxide |
| 12/21/1983 | EP0096499A1 Recovery of zinc from zinc-containing sulphidic material |
| 10/18/1983 | CA1155418A1 Electrowinning of zinc |
| 10/12/1983 | EP0091386A1 Process for purifying metals by segregation |
| 10/05/1983 | EP0090515A2 Treatment of solutions to facilitate the removal of ferric iron therefrom |
| 10/05/1983 | EP0090119A2 Selectively stripping iron ions from an organic solvent |
| 08/30/1983 | US4401531 Process for the production of electrolytic zinc or high purity zinc salts from secondary zinc raw-materials |
| 08/23/1983 | CA1152445A1 Zinc-cadmium chloride electrolysis |
| 08/02/1983 | US4396424 Utilizing heat obtained by reoxidizing the ferrous oxide |
| 08/02/1983 | US4396423 Carbiding iron |
| 08/02/1983 | CA1150953A1 Liquid-liquid extraction of metal values from aqueous solution |
| 07/26/1983 | US4394978 Grinding and separation into powders of metal and metal oxide |
| 07/26/1983 | CA1150518A1 Recovering non-volatile metals from dust containing metal oxides |
| 06/21/1983 | US4389379 Process for selective liquid-liquid extraction of germanium |
| 06/14/1983 | CA1147971A1 Process for the oxidation of ferrous ions to the ferric state in sulfate leach solutions |
| 06/07/1983 | CA1147558A1 Method of recovering volatile metals from material containing metal oxides |
| 05/24/1983 | US4384886 Process for zinc removal from oxide-containing iron sources |
| 05/24/1983 | CA1146906A1 Treating cement copper cake by acid leach and caustic leach to produce zinc arsenate |
| 05/17/1983 | US4383979 Improved by classifying particles into fine and course fractions, comminution |
| 04/05/1983 | US4379037 Removal of manganese and chloride ions from aqueous acidic zinc sulphate solutions |
| 03/15/1983 | US4376647 Heating with water vapor to form hydrogen sulfide, reacting hydrogen sulfide with lime to form calcium sulfide followed by separation |
| 03/08/1983 | US4376043 Process of treating dust containing zinc and lead and derived in an iron or steel making process |
| 02/16/1983 | EP0071684A1 Process for recovering zinc from zinc ferrite material |
| 02/15/1983 | CA1141172A1 Removal of manganese ions from zinc and manganese containing solutions |
| 02/01/1983 | US4371151 Blast furnace smelting of zinc |
| 12/22/1982 | EP0067619A2 Process for solution control in an electrolytic zinc plant circuit |
| 12/08/1982 | EP0066024A1 Process for the removal of manganese and chloride ions from aqueous acidic zinc sulphate solutions and process for the recovery of zinc |
| 12/07/1982 | US4362702 Hydrometallurgical process for the treatment of a raw material which contains oxide and ferrite of zinc, copper and cadmium |
| 12/01/1982 | EP0065815A1 Recovering zinc from zinc-containing sulphidic material |
| 10/19/1982 | US4355005 Process for the treatment of a raw material which contains oxide and ferrite of zinc, copper and cadmium |
| 08/31/1982 | CA1130934A1 Process for the recovery of copper and zinc values from sulphidic ore |
| 08/31/1982 | CA1130559A1 Blast furnace smelting of zinc |
| 08/24/1982 | US4346062 Chlorination leaching with sulfur extraction for recovery of zinc values |
| 08/24/1982 | US4345980 From zinc sulfate electrolyte |
| 08/04/1982 | EP0056880A1 Process for the production of an agglomerated burden for zinc shaft furnaces |
| 08/03/1982 | CA1128760A1 Process for treatment of residues from ferriferous zinc ores |
| 07/20/1982 | US4340423 Charging of zinc-smelting blast furnaces |
| 06/15/1982 | US4334918 Method of recovering non-ferrous metals from their sulphide ores |
| 04/27/1982 | US4326884 Reducing using combustion gases |
| 04/27/1982 | CA1122419A1 Process for re-extracting metal from an organic extraction solution in which the metal is present as a metal chloride complex |
| 04/20/1982 | CA1122003A1 Condensation of metal vapour |
| 04/13/1982 | CA1121605A1 Recovery of non-ferrous metals by thermal treatment of solutions containing non-ferrous and iron sulphates |
| 04/06/1982 | US4323391 Process for recovering zinc |
| 03/04/1982 | WO1982000664A1 Process for selective extraction of germanium |
| 02/24/1982 | EP0046437A1 Process for the selective extraction of germanium |
| 02/17/1982 | EP0046146A1 Use of a muffle furnace for the dezincification of oxidic ferriferous materials containing zinc |
| 02/16/1982 | CA1118214A1 Process for the preparation of an aqueous solution of zinc sulphate for use in the electrolytic preparation of zinc, by means of the leaching of roasted material |
| 02/02/1982 | US4313822 Method for recovering the lead and zinc values in secondary scrubber muds from blast furnace gases |
| 01/26/1982 | CA1116872A1 Hydrometallurgical process for extracting zinc |
| 01/26/1982 | CA1116869A1 Recovery of copper from arsenic-containing metallurgical waste materials |
| 01/12/1982 | US4310350 Recovering non-volatile metals from dust containing metal oxides |
| 12/29/1981 | CA1115024A1 Process of hydrometallurgical treatment for eliminating impurities from a solution containing dissolved metals |
| 12/15/1981 | CA1114175A1 Process for the recovery of zinc, copper and cadmium in the leaching of zinc calcine |
| 12/10/1981 | WO1981003500A1 Heavy metal recovery in ferrous metal production processes |
| 12/02/1981 | EP0040870A1 Process of treating a dust which contains zinc and lead and which is derived from an iron or steel making process |
| 12/01/1981 | CA1113256A1 Waelz process of volatilizing zinc and lead from iron oxide containing materials |
| 12/01/1981 | CA1113250A1 Roasting of sulphide materials |
| 11/24/1981 | US4302245 Magnetism |
| 11/24/1981 | CA1112880A1 Hydrometallurgical process for the treatment of oxides and ferrites which contain iron and other metals |
| 11/18/1981 | EP0039837A1 Process for the oxidation of ferrous ions to the ferric state in sulfate leach solutions |
| 10/28/1981 | EP0038608A1 Apparatus for refining molten metal |
| 09/29/1981 | US4292283 Method for the recovery of zinc |
| 09/29/1981 | US4292147 Using an electrolyte obtained from the leaching of a zinc-or cadmium-containing material with chlorine solution |
| 09/22/1981 | US4290866 Removal of manganese ions from zinc and manganese containing solutions |
| 09/22/1981 | US4290588 Apparatus for refining molten aluminum |
| 09/08/1981 | US4288304 Hydrometallurgical process for treatment of sulphur ores |
| 09/08/1981 | CA1108376A1 Method of removal of arsenic from a sulfuric acid solution |
| 08/26/1981 | EP0034579A1 Process and apparatus for treating dross and liquid scum |
| 08/19/1981 | EP0034138A1 Process for the hydrometallurgical treatment of materials that contain zinc |