| Patents for C22B 13 - Obtaining lead (1,881) |
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| 02/19/1986 | EP0171845A1 Process and apparatus for the continuous pyrometallurgical treatment of a copper-lead matte |
| 02/18/1986 | US4571261 Method for recovering lead from waste lead products |
| 02/18/1986 | US4571260 Smelting under oxidizing conditions then reduction |
| 02/18/1986 | CA1200702A1 Method of recovering metals from liquid slag |
| 02/10/1986 | CN85103877A Lead-smelting method without pollution problem |
| 02/04/1986 | US4568525 Method for the selective dissolution of lead from mixed minerals containing zinc |
| 02/04/1986 | US4568065 Means for separating solid and molten particles from the exhaust gases of metallurgical furnaces and way to recover lead from such gases |
| 01/21/1986 | US4565573 Purification of molten lead |
| 01/21/1986 | CA1199502A1 Hydrometallurgical method for recovering metal materials from spent lead-acid storage batteries |
| 01/14/1986 | CA1199180A1 Method of removing dross from a lead refining pot |
| 01/07/1986 | US4562996 Apparatus for melting metal |
| 01/03/1986 | WO1986000031A1 A method and apparatus for separating metal particles |
| 12/03/1985 | US4556422 Brine leaching under pressure |
| 10/30/1985 | EP0159349A1 Processes for treating waste streams |
| 10/22/1985 | US4548793 Electrochemical elimination of nickel from lead containing chloride solutions |
| 10/22/1985 | CA1195507A1 Production of steel |
| 10/08/1985 | US4545963 Process for separately recovering zinc and lead values from zinc and lead containing sulphidic ore |
| 09/04/1985 | EP0153914A1 A method for recovering the metal values from materials containing tin and/or zinc |
| 09/04/1985 | EP0153913A1 A method for producing metallic lead by direct lead-smelting |
| 08/21/1985 | EP0152332A2 Purification process for lead |
| 08/15/1985 | WO1985003526A1 New process for purifying lead |
| 07/16/1985 | US4529444 Using an elongated vessel; controlling temperature |
| 07/16/1985 | CA1190401A1 Process for treating sulphated lead compounds for recovering metallic lead and a high-purity sulphate and an installation therefor |
| 07/09/1985 | CA1190047A1 Method of concentrating silver from anode slime |
| 06/25/1985 | US4525208 Reduction and volaticlization into slag |
| 06/04/1985 | US4521247 Low temperature, non-SO2 polluting, kettle process for separation of lead from lead sulfide-containing material |
| 05/28/1985 | US4519836 Method of processing lead sulphide or lead-zinc sulphide ores, or sulphide concentrates, or mixtures thereof |
| 05/23/1985 | WO1985002204A1 Treatment of dross |
| 05/14/1985 | CA1186903A1 Hydrometallurgical process for the recovery of lead |
| 04/30/1985 | US4514223 Continuous direct process of lead smelting |
| 04/30/1985 | US4514222 High intensity lead smelting process |
| 04/30/1985 | US4514217 Method of producing lead from sulphidic lead raw-material |
| 04/30/1985 | CA1186156A1 Segregation process for the purification of metals |
| 04/25/1985 | WO1985001670A1 Processes for treating waste streams |
| 04/23/1985 | US4512803 Simultaneous reduction of solid or liquid lead chloride and of gaseous lead chloride |
| 04/23/1985 | US4512798 Method for producing lead from sulphidic and oxidic and/or sulphatic lead raw materials |
| 04/02/1985 | US4508688 Method of regenerating acetate in a metal removal process |
| 04/02/1985 | US4508565 Method for producing lead from oxidic lead raw materials which contain sulphur |
| 03/19/1985 | US4505744 Recovery of zinc from zinc containing sulphidic material |
| 01/29/1985 | US4496394 Continuous method of removing tin from lead |
| 01/23/1985 | EP0132243A1 A method for recovering lead from waste lead products |
| 01/22/1985 | CA1181244A1 Manufacture of lead from sulphidic lead raw material |
| 01/02/1985 | CA1180194A Process of blowing high-oxygen gases into a molten bath which contains non-ferrous metals |
| 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 |
| 12/11/1984 | US4487628 Selective reduction of heavy metals |
| 11/21/1984 | EP0126053A1 A method for producing lead from sulphidic lead raw material |
| 11/14/1984 | EP0125223A1 A method for producing lead from sulphidic and oxidic and/or sulphatic lead raw materials |
| 11/07/1984 | EP0124497A1 A method for producing lead from oxidic lead raw materials which contain sulphur |
| 10/23/1984 | US4478394 Apparatus for the separation of lead from a sulfidic concentrate |
| 10/09/1984 | US4475993 Extraction of trace metals from fly ash |
| 10/02/1984 | CA1175237A1 Continuous method and apparatus for removing copper from lead |
| 09/19/1984 | EP0119178A1 A method for separating solutions |
| 09/05/1984 | EP0117855A1 Process for recovering lead from lead chloride containing raw material |
| 08/14/1984 | US4465512 Smelting lead sulfide |
| 08/01/1984 | EP0114767A2 Electrochemical removal of nickel, antimonium, arsenicum and tin from a lead chloride solution |
| 07/24/1984 | CA1171289A1 Continuous process of smelting metallic lead directly from lead- and sulfur-containing materials |
| 07/24/1984 | CA1171288A1 Continuous process of smelting metallic lead directly from lead- and sulfur-containing materials |
| 07/18/1984 | EP0113649A1 A method for working-up complex sulphidic ore concentrates |
| 07/18/1984 | EP0113580A2 Heavy metal separation from copper-bearing wastes |
| 07/17/1984 | US4460442 Precipitation of lead and lead oxide with base, dissolving in fluoboric acid and electrolysis to recover lead |
| 07/17/1984 | US4460166 Method of removing dross from a lead refining pot |
| 06/26/1984 | US4456480 Controlled cooling, compaction, and remelting to form crystal layer between purified metal and impurities |
| 06/26/1984 | US4456231 Apparatus for refining lead |
| 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 |
| 06/12/1984 | CA1169122A1 Process for recovering lead and lead-compounds from scrap lead-acid accumulators |
| 05/30/1984 | EP0109468A1 Process for the selective recovery of lead from lead sulphides |
| 05/24/1984 | WO1984001964A1 Process for selectively extracting lead from lead sulphides |
| 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 |
| 04/03/1984 | US4440569 Recovery of zinc from zinc-containing sulphidic material |
| 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 | US4435211 Injection of cooling fluids to control crust formation |
| 03/06/1984 | CA1163382A1 Process of treating dust containing zinc and lead and derived in an iron or steel making process |
| 02/14/1984 | CA1162056A1 Process and apparatus for the separation of lead from a sulfidic concentrate |
| 02/08/1984 | EP0100237A2 Recovery of zinc from zinc-containing sulphidic material |
| 02/07/1984 | US4430117 Production of steel |
| 02/01/1984 | EP0099711A2 Continuous method of removing tin from lead |
| 02/01/1984 | EP0099475A1 Separation of elemental lead from blast furnace bullion |
| 01/24/1984 | US4427629 Adding alkalimetal-desired metal inter-metallic as refining dross |
| 01/17/1984 | CA1160461A1 Process for the recovery of lead from a lead-bearing sulfide concentrate |
| 01/10/1984 | US4425160 Adding sodium and sodium hydroxide, forming slags |
| 01/10/1984 | CA1160055A1 Method for the recovery of valuable metals from finely-divided pyrite |
| 12/28/1983 | EP0097144A1 Process for separating non ferrous metals from residues containing iron oxide |
| 11/29/1983 | CA1157665A1 Low temperature, non-so.sub.2 polluting, kettle process for separation of lead from lead sulfide- containing material |
| 11/22/1983 | US4416692 Lead as extractant |
| 11/08/1983 | CA1156471A1 Process for the treatment of solutions of lead chloride |
| 11/01/1983 | CA1156048A1 Process for the recovery of lead and silver from minerals and process residues |
| 10/18/1983 | US4410361 Method for desilverizing and removal of other metal values from lead bullion |
| 10/12/1983 | EP0091386A1 Process for purifying metals by segregation |
| 10/11/1983 | CA1155084A1 Process for the recovery of metal values from anode slimes |
| 09/27/1983 | US4406695 Process for producing alloy steel product or iron powder by furnacing ground iron or molten iron on a molten lead bath |
| 09/20/1983 | CA1153897A1 Hydrometallurgical process for the recovery of lead |
| 09/13/1983 | US4404026 Deleading |
| 09/06/1983 | US4402491 Apparatus for reclaiming lead and other metals |