| Patents for C22B 19 - Obtaining zinc or zinc oxide (2,969) |
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| 08/19/1981 | EP0034137A1 Process for the hydrometallurgical treatment of materials that contain zinc |
| 08/11/1981 | CA1106622A1 Hydrometallurgical method for treating sulphide ores |
| 08/11/1981 | CA1106620A1 Method for recovering zinc |
| 07/21/1981 | US4279867 Flotation |
| 07/21/1981 | CA1105266A1 Process and apparatus for recovering zinc |
| 07/14/1981 | CA1104838A1 Leaching of metal sulphides |
| 07/14/1981 | CA1104837A1 Process for recovery of copper and zinc from complex sulfides |
| 07/14/1981 | CA1104835A1 Method of and electric furnace for processing nonferrous molten slags |
| 06/30/1981 | US4276269 Precipitation of ferric silicate from zinc sulfate solution |
| 06/30/1981 | CA1103937A1 Blast furnace smelting of zinc |
| 06/23/1981 | US4274878 Lead sulfide core coated with zinc sulfide; roasted to produce briquettes |
| 06/16/1981 | CA1103039A1 Leaching of nickeliferous oxide ores containing iron and/or aluminum |
| 05/26/1981 | US4269398 Means for reclaiming galvanizing quality zinc alloy from continuous galvanizing line top dross |
| 05/06/1981 | EP0028158A1 Methods and systems of removal of metals from solution and of purification of metals and purified solutions and metals so obtained |
| 05/05/1981 | US4265644 Condensation of metal vapor |
| 04/21/1981 | CA1099523A1 Method for removing zinc from zinc-containing slags |
| 04/14/1981 | CA1099245A1 Method and apparatus for removing zinc type metals and compounds in dust recovery process in iron manufacture |
| 04/08/1981 | EP0026560A1 Boiler for molten metals and a method of boiling and refining a molten metal |
| 03/31/1981 | CA1098481A1 Zinc recovery by chlorination leach |
| 03/31/1981 | CA1098323A1 Process for recovery of zinc from the dust of an iron- making or steel-refining furnace |
| 03/25/1981 | EP0025466A1 A process for the recovery of arsenic as zinc arsenate from cement copper cake and a process for the purification of an impure zinc electrolyte using zinc arsenate so obtained |
| 03/17/1981 | CA1097507A1 Process of treating residues from the leaching of roasted zinc blende |
| 03/10/1981 | US4255185 Processes and apparatus for reducing and subsequently pelletizing moist fine-grained ore |
| 03/03/1981 | CA1096636A1 Hydrometallurgical process for the selective dissolution of mixtures of oxy compounds |
| 02/24/1981 | US4252775 Recovering a lead-bearing by-product by leaching with sulfuric acid in countercurrent stages |
| 02/10/1981 | US4250027 Scouring |
| 02/10/1981 | CA1095262A1 Method for the removal of ferric ions from a concentrated aqueous zinc solution |
| 02/10/1981 | CA1095261A1 Method for the reclamation of zinc from galvanizing baths |
| 02/04/1981 | EP0023428A1 Liquid-liquid process for extracting metals using organo-phosphorous compounds |
| 02/03/1981 | CA1094819A1 Hydrometallurgical process for the recovery of zinc, copper, and cadmium from their ferrites |
| 01/14/1981 | EP0022324A1 Zinc/cadmium chloride electrolysis |
| 01/06/1981 | US4243411 Reduction of metal sulfides |
| 12/30/1980 | CA1092365A1 Refining of ferrous and base metal sulphide ores and concentrates |
| 12/23/1980 | US4241039 Oxidation, precipitation of ferric hydroxide |
| 12/23/1980 | US4240826 Process for the recovery of arsenic as a zinc arsenate and its _utilization in the purification of zinc plant electrolytes |
| 12/09/1980 | US4238222 Waelz process of volatilizing zinc and lead from iron oxide-containing materials |
| 11/25/1980 | CA1090145A1 Extraction recovery of certain metal values |
| 11/25/1980 | CA1090143A1 Method of recovering zinc from a material containing zinc and iron |
| 11/04/1980 | US4231791 Zinc sulfide, lead sulfide, oxidation |
| 10/28/1980 | US4230487 Method of selectively bringing into solution the non-ferrous metals contained in sulphurized ores and concentrates |
| 10/21/1980 | CA1087861A1 Recovery of valuable metals and compounds thereof contained in molten slag |
| 10/01/1980 | EP0016595A1 A method of recovering non-ferrous metals from their sulphide ores |
| 09/23/1980 | US4224122 Recovery of non-ferrous metals by thermal treatment of solutions containing non-ferrous and iron sulphates |
| 09/09/1980 | US4221591 Continuous tapping using sloping hearth furnace |
| 08/26/1980 | US4219354 Hydrometallurgical process for the treatment of oxides and ferrites which contain iron and other metals |
| 08/26/1980 | CA1084276A1 Decomposition leach of sulfide ores with chlorine and oxygen |
| 08/19/1980 | CA1083830A1 Ion exchange treatment of zinc values |
| 08/19/1980 | CA1083829A1 Method of recovering valuable metals from zinc bearing materials and blast furnace relevant thereto |
| 08/12/1980 | CA1083358A1 Process for the recovery and purification of germanium from zinc ores |
| 07/15/1980 | US4212667 Blast furnace smelting of zinc |
| 07/09/1980 | EP0013098A1 Removal of manganese ions from zinc and manganese containing solutions |
| 07/08/1980 | CA1080979A1 Method for precipitating metal cement from a solution mixed with a precipitant |
| 07/01/1980 | US4210441 Method for the continuous or discontinuous treatment of molten slag, particularly with contents of heavy metal oxides, for the recovery of portions contained therein of valuable metals or their combinations, respectively |
| 07/01/1980 | CA1080485A1 Method and apparatus for carrying out wet metallurgical processes |
| 06/17/1980 | CA1079496A1 Process for stabilizing and consolidating residues comprising metal compounds |
| 05/20/1980 | US4203964 Sulfurization |
| 04/30/1980 | EP0010365A1 Treatment of zinc plant leach residues for recovery of the contained metal values |
| 04/29/1980 | US4200454 Process for the volatilization of zinc and/or lead from metallurgical material |
| 04/22/1980 | CA1075912A1 Process for the purification of an aqueous solution of zinc sulphate |
| 04/15/1980 | CA1075636A1 Recovery of zinc from residual solutions of electroplating |
| 04/08/1980 | CA1075015A1 Process for working up manganese modules and recovery of the contained valuable constituents |
| 03/11/1980 | US4192851 Leaching of metal sulphides |
| 03/11/1980 | CA1073216A1 Method of separating zinc and copper from aqueous solutions |
| 02/26/1980 | CA1072342A1 Recovery of lead |
| 02/12/1980 | CA1071429A1 Method and apparatus for purification of aqueous zinc sulphate solution used in electrolytical production of zinc |
| 02/06/1980 | EP0007662A1 Removal of zinc and lead from materials containing iron oxide by the rotary-kiln volatilizing process |
| 01/22/1980 | CA1070122A1 Process for manganese removal from metal bearing solutions |
| 01/08/1980 | CA1069318A1 Extraction of zinc and lead from their sulfides |
| 11/20/1979 | CA1066658A1 Recovery of zinc |
| 11/13/1979 | CA1066062A1 Recovery of nitric acid soluble transition metals from sulfur and iron containing ores of the same |
| 10/23/1979 | CA1064711A1 Extraction method for non-ferrous metals |
| 10/23/1979 | CA1064708A1 Process for separation and recovery of metal values from sulfide ore concentrates |
| 10/09/1979 | CA1063967A1 Zinc hydrometallurgical process |
| 09/25/1979 | US4168970 Cementation with a zinc dust and an antimony and/or arsenic compound |
| 09/18/1979 | US4168156 Method of and electric furnace for processing nonferrous molten slags |
| 09/04/1979 | CA1061572A1 Method of selectively bringing into solution the non-ferrous metals contained in sulphurized ores and concentrates |
| 08/14/1979 | US4164418 Improved smelting efficiency in separating and recovering volatile and non-volatile metals |
| 08/08/1979 | EP0003464A1 Process for the utilization of lead and zinc present in the mud resulting from the secundary scrubbing of blast furnace exhaust gases |
| 07/31/1979 | CA1059441A1 Continuous separation of solid metal impurities from zinc sulphate solutions |
| 07/24/1979 | CA1058885A1 Process for preventing the oxidation of liquid zinc |
| 07/03/1979 | CA1057511A1 Method for selectively dissolving non-ferrous metals contained in pyritic ores |
| 07/03/1979 | CA1057507A1 Process for recovering cobalt values from an aqueous ammonical solution containing dissolved cobalt and other metals as ammine sulphates |
| 06/19/1979 | CA1056855A1 5-heptyl-2-hydroxy benzaldoximes |
| 06/12/1979 | US4157912 Process for recovery of copper and zinc from complex sulphides |
| 05/22/1979 | CA1054778A1 Hydrometallurgical processing of metal sulfides |
| 05/08/1979 | CA1053914A1 Metal recovery from sulfate solutions |
| 04/17/1979 | US4149880 Smelter flue dusts and refinery wastes; leaching with sulfuric acid, solubilizing, precipitating toxins, cementation on iron |
| 04/17/1979 | CA1052585A1 Liquid ion exchange extraction of zinc |
| 04/10/1979 | US4148698 Refining of ferrous and base metal sulphide ores and concentrates |
| 03/20/1979 | CA1050768A1 Automatic leaching system for hydrometallurgical production of zinc |
| 03/13/1979 | CA1050267A1 Apparatus for recovery of metallic zinc from dross |
| 03/06/1979 | CA1049953A1 Two-stage pressure leaching process for zinc and iron bearing mineral sulphides |
| 02/20/1979 | CA1048790A1 Continuous reflux refining of metals |
| 02/06/1979 | CA1048176A1 Process for purifying aqueous solutions, of metal ions precipitating as arsenides, antimonides, tellurides, selenides, and tin and mercury alloys |
| 01/30/1979 | CA1047259A1 Condensation of zinc vapour |
| 01/16/1979 | US4134755 Method for removing zinc type metals and compounds in dust recovery process in iron manufacture |
| 01/09/1979 | CA1045829A1 Process for zinc and silicium bearing materials to recuperate the zinc content |
| 12/26/1978 | US4131451 Method for removing zinc from zinc-containing slags |
| 12/05/1978 | US4128617 Treatment of zinc calcines for zinc recovery |
| 11/28/1978 | CA1043110A1 Method for the collection of dust of a high zinc content during the production of reduced iron pellets |