| Patents for C22B 21 - Obtaining aluminium (4,001) |
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| 08/29/1989 | US4861370 Process for treating molten aluminum alloy with powdered flux |
| 08/23/1989 | EP0329638A1 Treatment and disposal of skims, salt slags and aluminium-containing scraps |
| 08/08/1989 | US4854968 Method of preparing high-purity metal and rotary cooling member for use in apparatus therefor |
| 07/25/1989 | US4850577 Melting and holding furnace |
| 07/13/1989 | WO1989006291A1 Salt-based melting process |
| 07/13/1989 | WO1989006289A1 Electrolytic cell and process |
| 07/04/1989 | US4844426 Vertical shaft furnace for melting aluminum |
| 07/04/1989 | US4844425 Apparatus for the on-line treatment of degassing and filtration of aluminum and its alloys |
| 07/04/1989 | CA1257000A1 Method and apparatus for determining soluble gas content |
| 07/04/1989 | CA1256694A1 Rotary device, apparatus and method for treating molten metal |
| 06/28/1989 | EP0322207A2 Recovery of non-ferrous metals from dross |
| 06/27/1989 | US4842643 Apparatus for, purifying a melt, which, besides one or more impurities, essentially contains a light metal, in particular aluminum |
| 06/27/1989 | US4842255 Dross cooling apparatus |
| 06/20/1989 | CA1336478B Recovery of Non-Ferrous Metals from Dross |
| 06/20/1989 | CA1255914A1 Recovery of non-ferrous metals from dross |
| 06/07/1989 | CN1004425B Improved technology for metal refining by fractional crystallization |
| 06/06/1989 | US4837385 Applying electromagnetic force field |
| 05/24/1989 | CN1033099A Improved stove |
| 05/23/1989 | US4832740 Aluminum fluoride powders |
| 05/16/1989 | US4830881 Method of making a container |
| 05/16/1989 | US4829703 Auxiliary flue for furnaces |
| 05/03/1989 | EP0314404A1 Improvements in or relating to furnaces |
| 04/25/1989 | US4824480 Crucible for the thermal analysis of aluminum alloys using special crucible |
| 04/25/1989 | US4824364 Non-ferrous metal smelting furnace |
| 04/18/1989 | US4822412 Method of removing lithium from aluminum-lithium alloys |
| 03/14/1989 | US4812168 Process for carbothermic production of alkaline earth metal aluminide and recovery of same |
| 03/09/1989 | WO1989001986A1 Method for refining aluminium alloys |
| 03/01/1989 | EP0304466A1 Device for liquid pumping. |
| 02/28/1989 | US4808222 One-package; red phosphorus, magnesium carbonate, potassium hexafluorosilicate |
| 02/14/1989 | US4804168 Apparatus for treating molten metal |
| 02/08/1989 | EP0302480A2 Auxiliary flue for furnaces |
| 02/07/1989 | US4802656 Rotary blade-type apparatus for dissolving alloy elements and dispersing gas in an aluminum bath |
| 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 |
| 01/12/1989 | WO1989000208A1 Process for degassing aluminum melts, and gas for use therein |
| 01/12/1989 | DE3721509A1 Process and apparatus for leaching metal-containing, non-predried raw materials |
| 12/28/1988 | EP0296532A2 Container and method of making same |
| 12/14/1988 | CN88103911A Method and apparatus for carrying out thermochemical process |
| 12/13/1988 | US4790873 Passing melts through metal-wettable filter and medium which retains metal-non-wettable material |
| 12/06/1988 | US4789446 Method of processing residues from the hydrometallurgical production of zinc |
| 12/01/1988 | WO1988009390A1 Process and device for implementing hot chemical processes |
| 11/23/1988 | EP0292469A1 Process and apparatus for high-temperature chemical operations |
| 11/23/1988 | EP0291580A1 Apparatus for in-line degassing and filtering of aluminium and its alloys |
| 11/22/1988 | CA1245178A1 Combination diaphragm and fractional crystallization cell |
| 11/15/1988 | US4784374 Two-stage aluminum refining vessel |
| 11/09/1988 | EP0290360A1 Filtration process for the separation of inclusions from molten metal |
| 11/02/1988 | EP0289295A1 Liquid metal launder |
| 11/02/1988 | EP0289294A1 Aluminium alloy treatment |
| 11/01/1988 | US4781581 Melting and holding furnace |
| 10/05/1988 | EP0285566A1 Process for removing alkali and earth alkali metals from aluminium melts |
| 09/22/1988 | WO1988007165A1 Device for liquid pumping |
| 09/20/1988 | US4772320 Aluminum, compression between rolls |
| 09/20/1988 | US4772319 Process for treating molten aluminum to remove hydrogen gas and non-metallic inclusions therefrom |
| 09/13/1988 | US4770696 Process for carbothermic production of calcium aluminide using calcium carbide |
| 09/07/1988 | EP0281508A1 Apparatus for degassing molten metal |
| 09/07/1988 | EP0280695A1 Ceramic filter for filtering molten metal |
| 09/06/1988 | US4769158 Molten metal filtration system using continuous media filter |
| 09/06/1988 | US4769069 Process for production of aluminum by carbothermic production of alkaline earth metal aluminide and stripping of aluminum from alkaline earth metal aluminide with halide stripping agent |
| 09/06/1988 | US4769068 Process for production of aluminum by carbothermic production of alkaline earth metal aluminide and stripping of aluminum from alkaline earth metal aluminide with sulfurous stripping agent |
| 09/06/1988 | US4769067 Electrolytically reducing impurities; forming alloy; n2 stripping; increased yield |
| 08/30/1988 | US4767598 Purging gas mixed in chamber; oxygen-free, nonexplosive; alloying |
| 08/23/1988 | US4766552 Method of controlling the alumina feed into reduction cells for producing aluminum |
| 08/23/1988 | US4765833 Porous ceramic structure and method of filtering aluminum |
| 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 |
| 08/03/1988 | EP0276576A1 Metal treatment |
| 08/02/1988 | US4761207 Continuous salt-based melting process |
| 07/27/1988 | EP0275814A1 Process for simultaneously crystallising sodium chlorides and potassium chlorides |
| 07/19/1988 | US4758316 Melting, purifying |
| 07/06/1988 | CN85108571B Rotary device, apparatus and method for treating molten metal |
| 06/21/1988 | US4752328 Dissolving soluble components in water, separation-then screening and crushing remainder |
| 06/16/1988 | WO1988004331A1 Fire-proof ceramic component |
| 06/16/1988 | DE3642201C1 Feuerfestes keramisches Bauteil Refractory ceramic component |
| 06/08/1988 | EP0270135A1 Method of removing lithium from aluminum-lithium alloys |
| 06/08/1988 | EP0269733A1 Method for refining aluminium-silicon alloy of eutectic composition from admixtures of iron and titanium |
| 06/01/1988 | CN87107133A Fluxing agent for regeneration of metal from waste aluminium slag |
| 05/24/1988 | US4746362 Crucible for the thermal analysis of aluminum alloys |
| 05/18/1988 | EP0267197A1 Melting and holding furnace. |
| 05/17/1988 | US4744823 Process for the purification of metals by fractional crystallisation |
| 05/17/1988 | US4744545 Apparatus for degassing molten metal |
| 05/04/1988 | EP0265531A1 Metal melting furnace |
| 05/03/1988 | CA1235909A1 Method for producing aluminium |
| 04/26/1988 | US4740239 Controlled reduction in rotary kiln |
| 04/19/1988 | US4738717 Injection of sparging gas through a spinning nozzle into a melt-preheating, conditioning |
| 04/13/1988 | EP0263539A1 Process for treating zinc hydrometallurgy residues |
| 04/05/1988 | US4735654 Process for reduction of metal compounds by reaction with alkaline earth metal aluminide |
| 03/30/1988 | EP0262058A1 Rotating devices having blades for dissolving alloy elements and for dispersing gas in a bath of aluminium |
| 03/29/1988 | US4734127 Process and apparatus for refining aluminum |
| 03/29/1988 | CA1234478A1 Production of a purified alumina-silica product and substantially pure aluminum chloride from bauxites, bauxitic clays, kaolinitic clays and mixtures thereof |
| 03/22/1988 | US4732606 Process of treating aluminum-containing fused slag |
| 03/16/1988 | CN87106034A Ceramic foam filter 23 |
| 03/15/1988 | US4731732 Method and apparatus for determining soluble gas content |
| 03/10/1988 | WO1988001532A1 Ceramic filter for filtering molten metal |
| 03/09/1988 | EP0258567A1 Process for controlling the density of solidified aluminium by regulating the hydrogen content of aluminium melts |
| 02/24/1988 | CN86105578A Refining modification fluxing agent |
| 02/16/1988 | CA1232765A1 Method and apparatus for adding heat to molten metal |
| 02/09/1988 | US4724054 Process for production of aluminum and alkaline earth metal by carbothermic production of alkaline earth metal aluminide and reduction of aluminum and alkaline earth metal in electrolytic reduction cell |
| 02/09/1988 | US4723763 Device for continuous injection under low pressure of a powdered additive into a stream of molten metal |
| 01/12/1988 | US4718955 Oxidizing the polymer |
| 01/05/1988 | US4717126 Apparatus for holding and refining of molten aluminum |