| Patents for C22B 15 - Obtaining copper (5,364) |
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| 09/25/1984 | CA1174860A1 Method of recovering gold from anode slimes |
| 09/18/1984 | CA1174475A1 Hydrometallurgical process for the treatment of a raw material which contains oxide and ferrite of zinc, copper and codmium |
| 09/18/1984 | CA1174474A1 Process for separating metals from aqueous solutions |
| 09/11/1984 | US4470845 Oxidation, multistage, desulfurization |
| 09/04/1984 | US4469513 Molten copper oxygenation |
| 09/04/1984 | US4469312 Melting furnace of a rigid structure |
| 09/04/1984 | CA1173655A1 Acid leach process for treating magnetic and non- magnetic nickel-copper mattes |
| 09/04/1984 | CA1173623A1 Continuous filtering and degassing of molten copper |
| 08/30/1984 | WO1984003307A1 Method of maintaining and testing for proper concentrations of thiourea in copper refining electrolysis cells |
| 08/28/1984 | US4468302 Leaching, electrolysis |
| 08/07/1984 | US4464344 Process for recovering non-ferrous metal values from ores, concentrates, oxidic roasting products or slags |
| 07/31/1984 | US4462845 Oxygen-free dispersion-strengthened copper and process for making same |
| 07/31/1984 | US4462575 Hood assembly for a metallurgical converter |
| 07/18/1984 | EP0113649A1 A method for working-up complex sulphidic ore concentrates |
| 07/18/1984 | EP0113580A2 Heavy metal separation from copper-bearing wastes |
| 07/03/1984 | US4457779 Ferric oxide |
| 07/03/1984 | CA1170210A1 Process for removing dissolved selenium values from an acidic aqueous copper sulphate solution |
| 06/26/1984 | US4456479 Injection of lifting gas into low vapor pressure melt under vacuum to cause gas flow, then condensation |
| 06/19/1984 | CA1169247A1 Apparatus for refining molten aluminum |
| 06/07/1984 | WO1984002148A1 Precious metal recovery |
| 06/05/1984 | US4452706 Metals recovery |
| 05/29/1984 | US4451291 Overlappi-ng short blowing periods for removal of impurities |
| 05/29/1984 | US4451289 Process for extracting non-ferrous metals from iron-bearing scraps |
| 05/22/1984 | US4450002 Detoxification of waste water by acidification and rapid flow over aluminum; sewage treatment |
| 05/08/1984 | CA1166846A1 Mechanical punching apparatus for copper smelting converter |
| 04/24/1984 | US4444586 Method of melting copper in a hearth melt-down furnace with roof burner system |
| 04/24/1984 | CA1166020A1 Method of disposing of spent organic complexing solutions containing cuprous halides |
| 04/10/1984 | US4442072 Selective recovery of base metals and precious metals from ores |
| 04/10/1984 | US4441969 Aryl hydroxy carboxylic acid |
| 04/03/1984 | US4440569 Recovery of zinc from zinc-containing sulphidic material |
| 04/03/1984 | CA1164653A1 Converter for refining liquid metals |
| 03/27/1984 | CA1164219A1 Process for recovery of copper from contaminated solids |
| 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 |
| 02/14/1984 | US4431613 Leaching of sulphidic mattes containing non-ferrous metals and iron |
| 01/31/1984 | US4428773 And ammonia-free solution |
| 12/27/1983 | US4423011 Selective recovery of base metals and precious metals from ores |
| 12/27/1983 | US4422911 Supplying hydrogen to barrier surface and transuerse fluid flow through barrier |
| 12/27/1983 | US4422872 Method of heating, melting, and coal coversion and apparatus for the same |
| 12/27/1983 | CA1159261A1 Method and apparatus for the pyrometallurgical recovery of copper |
| 12/20/1983 | US4421552 Smelting calcine |
| 12/06/1983 | CA1158051A1 Purifying copper salts |
| 12/06/1983 | CA1158043A1 Melting furnace for granulated metal |
| 11/29/1983 | US4418043 Process for separating metals from aqueous solutions |
| 11/29/1983 | CA1157664A1 Process for the smelting of copper or nickel concentrate |
| 11/22/1983 | US4416690 Solid matte-oxygen converting process |
| 11/15/1983 | US4415540 Roasting; leaching with sulfuric acid; separation; circulation; simplification |
| 11/15/1983 | CA1156832A1 Multiple level refractory hearth for vertical shaft metal melting furnace |
| 11/08/1983 | US4413816 Gas-blast pipe for feeding reaction agents into metallurgical melts |
| 11/08/1983 | US4413813 Disposable bed filter apparatus |
| 11/01/1983 | CA1156052A1 Recovery of metal values |
| 11/01/1983 | CA1156050A1 Recovery of copper from chalcopyrite |
| 10/18/1983 | US4410496 Recovery of metal values from complex sulfides |
| 10/11/1983 | CA1155084A1 Process for the recovery of metal values from anode slimes |
| 10/05/1983 | EP0090515A2 Treatment of solutions to facilitate the removal of ferric iron therefrom |
| 09/20/1983 | CA1153984A1 Ammonia leaching |
| 09/20/1983 | CA1153896A1 Process for recovering copper |
| 09/13/1983 | US4404071 Method of treating electrolytic solution of copper for purification and reuse thereof |
| 09/13/1983 | CA1153561A1 Separation of antimony |
| 09/06/1983 | US4402740 Dual fuel burner for metal melting furnaces |
| 09/01/1983 | WO1983002956A1 Oxygen-free dispersion-strengthened copper and process for making same |
| 08/30/1983 | CA1152755A1 Manufacture of copper bodies |
| 08/23/1983 | CA1152337A1 Leaching of sulphidic mattes containing non-ferrous metals and iron |
| 08/02/1983 | US4396181 Converter for refining liquid metal |
| 08/02/1983 | CA1150953A1 Liquid-liquid extraction of metal values from aqueous solution |
| 07/27/1983 | EP0084517A1 Process for depositing metals on semi-conductive powders |
| 07/19/1983 | US4394164 Process for removal of harmful impurities from metallurgical sulphide melts |
| 07/19/1983 | CA1150064A1 Process and apparatus for recovery of hydrogen-reduced metals, ions and the like at porous hydrophobic catalytic barriers |
| 07/19/1983 | CA1150062A1 Hydrometallurgical treatment of copper-bearing hematite residue |
| 07/12/1983 | US4392962 Process for separating metals from aqueous solutions |
| 07/12/1983 | CA1149606A1 Hood assembly for a metallurgical converter |
| 06/21/1983 | US4389248 Method of recovering gold from anode slimes |
| 06/21/1983 | US4389044 Mechanical punching apparatus for copper smelting converter |
| 06/15/1983 | EP0081310A2 Metal sulphide extraction |
| 06/08/1983 | EP0080996A2 Process for recovering metals from acid solutions of their salts |
| 06/07/1983 | US4386956 Metal recovery process from aluminum dross |
| 06/07/1983 | CA1147553A1 Method and apparatus for automatically punching the tuyeres of a converter |
| 05/24/1983 | US4384890 Cupric chloride leaching of copper sulfides |
| 05/24/1983 | CA1146906A1 Treating cement copper cake by acid leach and caustic leach to produce zinc arsenate |
| 05/24/1983 | CA1146723A1 Removal of selenium from acidic copper/nickel solutions |
| 05/17/1983 | US4383979 Improved by classifying particles into fine and course fractions, comminution |
| 05/10/1983 | CA1145954A1 Process for the oxidation of molten low- iron metal matte to produce raw metal |
| 05/10/1983 | CA1145952A1 Process for selective leaching of nickel- copper matte |
| 04/12/1983 | CA1144366A1 Sprinkler burner and method of introducing particulate material and a gas into a reactor |
| 04/05/1983 | CA1143951A1 Process for oxygen sprinkle smelting of sulfide concentrates |
| 03/29/1983 | US4378275 Metal sulphide extraction |
| 03/29/1983 | US4378245 Distillation process for separating silver and copper chlorides |
| 03/29/1983 | CA1143559A1 Apparatus for automatically punching the tuyeres of a converter |
| 03/15/1983 | US4376754 Decopperizing, dilution |
| 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 | CA1142366A1 Method of converting a bath of non-ferrous molten metal matte |
| 03/01/1983 | CA1141953A1 Mechanical punching device for punching the tuyeres of a converter |
| 02/22/1983 | US4374808 Removal of selenium from acidic copper/nickel solutions |
| 02/15/1983 | CA1141175A1 Method of safely injecting oxygen reactive materials into a submerged oxygen gas stream |
| 01/18/1983 | US4369164 Recovery of copper from arsenical drosses by ammonium arsenate leach |
| 01/18/1983 | CA1139556A1 Method and apparatus for charging anode scraps to a converter furnace |
| 01/05/1983 | EP0068469A2 Refining copper-bearing material contaminated with nickel, antimony and/or tin |
| 12/28/1982 | CA1138474A1 Process for the preparation of a 1,2-dioxime |