| Patents for C22B 7 - Working-up raw materials other than ores, e.g. scrap, to produce non-ferrous metals or compounds thereof (11,341) |
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| 03/23/1989 | WO1989002481A1 Process and device for processing hydroxide sludges |
| 03/23/1989 | DE3729913A1 Verfahren und vorrichtung zur aufarbeitung von hydroxidschlaemmen Method and device for regeneration treatment of hydroxidschlaemmen |
| 03/22/1989 | CN1031861A Magnetic separation and concentration of valuable metals from slag of lead smelting furnace and their smelting processes |
| 03/21/1989 | US4814004 Cleaning slag |
| 03/15/1989 | EP0307250A2 Method of separating flat metal alloy particles |
| 03/14/1989 | US4812168 Process for carbothermic production of alkaline earth metal aluminide and recovery of same |
| 03/14/1989 | US4812167 Drying, aggregation, calcination, vacuum thermal cracking |
| 03/08/1989 | EP0305418A1 Process for recovering platinum group metals. |
| 03/08/1989 | CN1031567A Dissolution and purification of crude rhodium and high rhodium-containing alloy waste |
| 03/08/1989 | CN1031565A Vacuum extraction of silver, bismuth and zinc from bismuth-silver-zinc-containing shell |
| 02/28/1989 | US4808221 Oxidizing and separating products |
| 02/22/1989 | EP0304231A2 Method of separating metals from catalyst material |
| 02/22/1989 | CN1031254A Blowing process for all cold charge in fume-off furnace |
| 02/08/1989 | EP0302345A2 Process for jointly removing undesirable elements from valuable metals containing electrolytic solutions |
| 02/07/1989 | US4803061 Desulfurization, demetallization |
| 02/07/1989 | US4802919 Heating in reducing slag with carbonaceous material |
| 02/07/1989 | CA1249885A1 Membrane processes for metal recovery and pollution control in metal process industries |
| 01/24/1989 | US4800069 Haliding a metal ferrite |
| 01/24/1989 | US4799530 Gelation, solidification, pulverization, oxalate precipitate |
| 01/18/1989 | EP0299340A1 Method of removing heavy metal compounds from the filter dust from plants for the incineration of solid waste from plants for removing dust from smoke gases and from plants for gas purification |
| 01/18/1989 | CN1030444A Process for treatment of ores or concentrates of lead sulfuride and/or lead-zinc sulfuride |
| 01/17/1989 | US4798709 Recovering vanadium, pressure leaching |
| 01/17/1989 | US4798708 Process for recovering chromium and other metal values from chromium bearing material |
| 01/17/1989 | CA1248753A1 Light gauge metal scrap melting system |
| 01/03/1989 | CA1247865A1 Method of treating the slag from a copper converter |
| 12/29/1988 | WO1988010243A1 Process for chemical stabilization of heavy metal bearing dusts and sludges, such as eaf dust |
| 12/29/1988 | DE3719583A1 Method for reprocessing Zn- and Pb-containing wastes |
| 12/28/1988 | EP0296616A1 Process for the detoxification of steel plant wastes |
| 12/28/1988 | CA1247365A Dross cooler and processor |
| 12/20/1988 | US4792342 Powder densification using ice |
| 12/06/1988 | US4789446 Method of processing residues from the hydrometallurgical production of zinc |
| 11/30/1988 | EP0292992A2 Non-ferrous metal recovery |
| 11/23/1988 | EP0291746A1 Process for removing metals from soils, dusts and sludges |
| 11/22/1988 | US4786621 Process for recovery of cobalt and manganese for oxidation residue incinerator ash |
| 11/17/1988 | EP0290974A1 Thermal treatment of solid scrap containing heavy metal compounds and/or toxic hydrocarbons |
| 11/15/1988 | US4784688 Tungsten recovery |
| 11/15/1988 | US4784687 Hydrogen peroxide and promoters for multistage extraction |
| 11/15/1988 | CA1244654A1 Method for recovering precious metals |
| 11/09/1988 | EP0290308A1 Process for the recuperation of vanadium |
| 11/01/1988 | US4781581 Melting and holding furnace |
| 10/27/1988 | DE3811594A1 Method for processing lead-containing or lead- and zinc-containing sulphide ores and/or concentrates |
| 10/25/1988 | US4780135 Process for the detoxification of steel plant wastes |
| 10/20/1988 | WO1988007896A1 Disposal and recycling of scrap metal from sea and other vessels |
| 10/19/1988 | EP0287540A2 The treatment of mercurial waste |
| 10/18/1988 | US4778519 Recovery of precious metals from a thiourea leach |
| 10/05/1988 | EP0285458A2 Method of treating dust in metallurgical process waste gases |
| 10/04/1988 | US4775480 Membrane processes for treatment of and recovery of components from kraft black liquors |
| 10/04/1988 | US4775452 Process for dissolution and recovery of noble metals |
| 10/04/1988 | US4775413 Concentration and recovery of mineral values from ores |
| 10/04/1988 | US4775107 Method of processing small batteries |
| 09/28/1988 | EP0284135A2 Process for recovering small batteries |
| 09/27/1988 | CA1242327A1 Process for removing metals from aluminosilicate materials |
| 09/20/1988 | US4772339 Method of treating cemented carbide bodies regarding their compositions and structures |
| 09/15/1988 | DE3727576C1 Process for reprocessing fine-grained ferrous by-products from steelworks and metallurgical works to form lumpy material for use in blast furnaces |
| 09/15/1988 | DE3707261A1 Process for the leaching of heavy metals from sewage sludge and low-value ores |
| 09/13/1988 | US4770700 Hydrometallurgical process for the separation and enrichment of gold, platinum, and palladium, together with recovery of selenium from the anode sludge of copper electrolysis |
| 09/06/1988 | US4769116 Hydrometallurgical process for an overall recovery of the components of exhausted lead-acid batteries |
| 08/30/1988 | US4767451 Method of operating an electric arc furnace |
| 08/30/1988 | CA1241200A1 Method of processing an iron-containing dust obtained in the preparation of iron or steel |
| 08/25/1988 | WO1988006192A1 Process for recovering platinum group metals |
| 08/23/1988 | US4765832 Process for carbothermic production of calcium aluminide using slag containing calcium aluminate |
| 08/23/1988 | US4765831 Process for production of alkaline earth metal by carbothermic production of alkaline earth metal aluminide and stripping of alkaline earth metal from alkaline earth metal aluminide with nitrogen stripping agent |
| 08/23/1988 | US4765829 Treating lead- and zinc-containing steelmaking byproducts |
| 08/09/1988 | US4763337 Process for melting particulate material |
| 08/09/1988 | US4762554 Process to eliminate hazardous components from the electric arc furnace flue dust and recovering of metals |
| 08/02/1988 | CA1239798A1 Process for recovering valuable metals from an iron dust containing a higher content of zinc |
| 08/02/1988 | CA1239786A1 Apparatus for drying metal turnings or scrap |
| 07/27/1988 | EP0275863A1 Method and apparatus for reclaiming metal values from electric arc furnace flue dust and sludge and rendering residual solids recyclable or non-hazardous |
| 07/27/1988 | EP0275814A1 Process for simultaneously crystallising sodium chlorides and potassium chlorides |
| 07/26/1988 | CA1239524A1 Method for magnesium sulfate recovery |
| 07/21/1988 | DE3700769A1 Process for melting metal scrap, in particular steel scrap, in an electric arc furnace |
| 07/19/1988 | US4758268 Method and apparatus for reclaiming metal values from electric arc furnace flue dust and sludge and rendering residual solids recyclable or non-hazardous |
| 07/13/1988 | EP0274059A2 Process for the recycling of electrical batteries, assembled printed circuit boards and electronic components |
| 07/12/1988 | US4756889 Process for recovering metals and metallic salts |
| 07/12/1988 | CA1239020A1 Method for recovering zinc from substances containing a zinc compound |
| 07/12/1988 | CA1239018A1 Process of producing synthetic rutile from titaniferous product having a high titanium dioxide content |
| 06/29/1988 | EP0272465A1 Process and device for the separation and/or reaction of particles |
| 06/29/1988 | CN86108721A New technology for separation and recovery of silver or silver alloy from compound material |
| 06/22/1988 | EP0271845A1 Process for recovering gallium trichloride from gallium-containing waste |
| 06/21/1988 | US4752328 Dissolving soluble components in water, separation-then screening and crushing remainder |
| 06/16/1988 | WO1988004476A1 Process for the recycling of electrical batteries, assembled printed circuit boards and electronic components |
| 06/15/1988 | CN85106670B Process for extraction of noble metal from anode mud by method of controlling potential |
| 06/14/1988 | US4751063 Process for treating spent catalyst including antimony halides from chlorofluorocarbon production |
| 06/14/1988 | CA1237900A1 Method for leaching and recovering vanadium from vanadium bearing by-product materials |
| 06/08/1988 | EP0270135A1 Method of removing lithium from aluminum-lithium alloys |
| 06/02/1988 | WO1988003912A1 Process for recovering metal values from ferrite wastes |
| 06/02/1988 | WO1988003911A1 Process for recovering metal values from jarosite solids |
| 06/01/1988 | EP0269604A2 Process and furnace for smelting fines, in particular metal or metal-oxide dusts |
| 06/01/1988 | CN87107133A Fluxing agent for regeneration of metal from waste aluminium slag |
| 05/31/1988 | US4747547 Crushing, specific gravity separation |
| 05/31/1988 | CA1237283A1 Method for recovering precious metals from precious metal-bearing materials such as ore and tailings |
| 05/24/1988 | CA1236980A1 Process for the recovery of gold from a precious metal bearing sludge concentrate |
| 05/18/1988 | EP0267197A1 Melting and holding furnace. |
| 05/11/1988 | EP0266975A1 Smelting reduction |
| 05/04/1988 | EP0266337A1 Hydrometallurgical process for recovering silver from electrolytic copper refinery slimes and from similar raw materials |
| 05/04/1988 | EP0265940A2 Process for recovery of silver from spent, waste, acidic processing fluids |
| 05/04/1988 | EP0265531A1 Metal melting furnace |
| 05/04/1988 | EP0163666B1 Treatment of dross |
| 04/26/1988 | US4740244 Process for recovery of silver from spent, waste, acidic processing fluids |
| 04/26/1988 | CA1235577A1 Treatment of residues |