| Patents for C22B 21 - Obtaining aluminium (4,001) |
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| 05/03/1991 | CA2028435A1 Preheat indicator |
| 04/24/1991 | CN1050904A Protective lining for aluminum refinning vessel |
| 04/24/1991 | CA2009337A1 Coolant for aluminium dross |
| 04/15/1991 | WO1991005883A1 Melting apparatus of cutting scrap |
| 03/27/1991 | EP0419378A1 Apparatus for treating a static aluminium bath of large surface area using gases |
| 03/21/1991 | WO1991003327A1 Method, apparatus, and reactant for removal of paint and epoxies from metallic beverage containers |
| 03/20/1991 | EP0417734A1 Protective lining for aluminum refining vessel |
| 03/20/1991 | EP0417296A1 Direct smelting process |
| 03/12/1991 | US4999101 Preheat indicator |
| 03/12/1991 | US4998710 Apparatus for holding and refining of molten aluminum |
| 03/05/1991 | US4997476 Recovery of free aluminum from aluminum dross using plasma energy without use of a salt flux |
| 02/12/1991 | US4992241 Recycling of metal matrix composites |
| 02/06/1991 | CN1011486B Ceramic foam filter 23 |
| 02/05/1991 | US4990059 Method for filtering liquid-phase metals |
| 01/22/1991 | CA1279188C Melting furnace having a rotary drum which can be inclined to slope to either end swivelled about a vertical axis |
| 01/16/1991 | EP0407664A1 Melting and holding furnace |
| 01/15/1991 | US4985067 Process and device for implementing hot chemical processes |
| 01/08/1991 | US4983216 Removal of salt and skim layers |
| 12/27/1990 | EP0403695A1 Process and plant for recycling scrap appliances |
| 12/19/1990 | EP0403406A1 Process and apparatus for degassing and maintaining a low hydrogen content in molten aluminium alloys during transport in ladles |
| 12/05/1990 | EP0400925A2 Process and apparatus for melting contaminated metalliferous scrap material |
| 12/05/1990 | EP0400214A1 Metal melting and holding furnace |
| 12/04/1990 | US4974817 Metal melting and holding furnace |
| 11/22/1990 | EP0398719A2 Improvements in apparatus for particle determination in liquid metals |
| 11/07/1990 | EP0396267A1 Method and apparatus for the treatment of molten metals |
| 11/07/1990 | EP0304466B1 Device for liquid pumping |
| 11/05/1990 | CA2015341A1 Method and apparatus for the treatment of molten metals |
| 10/31/1990 | EP0395138A1 Device for the purification of molten metal, in particular aluminium |
| 10/17/1990 | EP0392900A1 Process and apparatus for the treatment of a liquid with a gas |
| 10/04/1990 | WO1990011380A1 Treatment of aluminum reduction cell linings combined with use in aluminum scrap reclamation |
| 10/04/1990 | WO1990011379A1 Method and installation for processing scrap of aluminium and of its alloys |
| 10/02/1990 | US4960460 Melting, removing molten metal from residue; insolubilizing fluorides in slag with exides |
| 09/25/1990 | US4959101 Process for degassing aluminum melts with sulfur hexafluoride |
| 09/25/1990 | US4959100 Recovering aluminum |
| 09/25/1990 | US4958809 Liquid metal launder |
| 09/20/1990 | WO1990010516A1 Die-casting process, equipment, and product |
| 09/20/1990 | CA2047700A1 Die-casting process, equipment, and product |
| 09/19/1990 | EP0388010A1 Filters for light metals |
| 09/12/1990 | EP0233872B1 Method for the treatment of metals and alloys for the refining thereof |
| 09/05/1990 | EP0385617A1 Injecting gas into molten metal |
| 09/04/1990 | US4954168 Reclaiming of aluminum-chromium waste materials from etching operations |
| 08/28/1990 | US4952237 Method and apparatus for recovery of non-ferrous metals from dross |
| 08/23/1990 | CA2009272A1 Filters for light metals |
| 08/17/1990 | CA2010235A1 Injecting gas into molten metal |
| 08/14/1990 | US4948102 Method of preparing high-purity metal and rotary cooling member for use in apparatus therefor |
| 07/27/1990 | WO1990008843A1 Direct smelting process |
| 07/25/1990 | EP0379245A1 Process and plant for the processing of slag from aluminium scrap and waste melting, recovery of components thereof and treatment of gasses generated |
| 07/17/1990 | US4941647 Protective lining for aluminum refining vessel |
| 07/17/1990 | CA1271638A1 Treating aluminium with chlorine |
| 07/03/1990 | US4938457 Apparatus for treating aluminous metal skim material |
| 06/28/1990 | EP0370075A4 Electrolytic cell and process. |
| 06/27/1990 | EP0375308A1 Process and apparatus for producing high purity aluminum |
| 06/20/1990 | EP0373673A2 Apparatus and process for removing volatile coatings from scrap metal |
| 06/13/1990 | CN1042946A Process and device for production of refined aluminium |
| 06/12/1990 | CA1270111A1 Method of and apparatus for treating and subdividing a liquid using centripetal force |
| 06/08/1990 | CA2004813A1 Rotor shaft for high temperature use in corrosive atmosphere |
| 06/06/1990 | EP0371832A1 Recovery of Gallium contained in aqueous solutions |
| 06/05/1990 | US4931091 Treatment of molten light metals and apparatus |
| 05/30/1990 | EP0370075A1 Electrolytic cell and process |
| 05/30/1990 | EP0370006A1 Process for degassing aluminum melts, and gas for use therein |
| 05/23/1990 | EP0369725A1 Method and apparatus for determination of gas concentration in molten metal and metal matrix composites |
| 05/22/1990 | US4927459 Treatment of aluminum reduction cell linings combined with use in aluminum scrap reclamation |
| 05/16/1990 | CN1042189A Treatment of molten light metals |
| 05/14/1990 | EP0349601A4 Salt-based melting process. |
| 04/17/1990 | US4917728 Adding liquid alloying material; heat treatment |
| 04/17/1990 | CA1267783A1 Dross cooling |
| 03/28/1990 | CN1040827A Improved two-stage aluminum refining vessel |
| 03/21/1990 | EP0312549B1 Fire-proof ceramic component |
| 03/20/1990 | US4909836 Apparatus and a method for improved filtration of inclusions from molten metal |
| 03/14/1990 | EP0243384B1 Device for filtering molten metals |
| 03/13/1990 | US4908060 Dispersing gas in molten metal by use of rotating device so that metal enters manifold through open end, supplying gas to shaft so that it enters manifold forming dispersion |
| 03/13/1990 | US4907784 Apparatus for successively fusing small particles of nonferrous metal |
| 03/07/1990 | EP0267197B1 Melting and holding furnace |
| 03/06/1990 | US4905914 Method of segregating metallic components and impurities |
| 02/21/1990 | CN1006904B Fluxing agent for regeneration of metal from waste aluminium slag |
| 02/07/1990 | CN1006681B Filtration apparatus |
| 01/31/1990 | EP0352355A1 Improved two-stage aluminum refining vessel |
| 01/30/1990 | US4897115 Method of, purifying a melt, which, besides one or more impurities, essentially contains a light metal, in particular aluminum |
| 01/24/1990 | CN1039106A Apparatus for stirring molten metal |
| 01/24/1990 | CN1039064A Process for purification of gallium by partial solidification |
| 01/16/1990 | US4894208 Sodium, aluminum, plating |
| 01/10/1990 | EP0349601A1 Salt-based melting process |
| 01/09/1990 | US4892294 Device for liquid pumping |
| 01/03/1990 | EP0349449A1 Process for purifying gallium by partial solidification |
| 01/03/1990 | CN2050410U Pneumatic powders conveyer |
| 12/27/1989 | EP0348037A1 Apparatus for stirring molten metal |
| 12/20/1989 | EP0347108A1 Treatment of molten light metals |
| 11/15/1989 | CN1037175A Rotary device, apparatus and method for treating molten metal |
| 11/14/1989 | US4880541 Hot filter media |
| 11/07/1989 | CA1262636A1 Pre-refining treatment of metals and alloys |
| 10/31/1989 | US4877448 Process for recovery of free aluminum from aluminum dross or aluminum scrap using plasma energy |
| 10/10/1989 | US4872908 Metal treatment |
| 10/04/1989 | EP0335707A2 Method for transferring heat between process liquor streams |
| 09/27/1989 | EP0334786A2 Recycling process for slag, especially salts proceeding from the refining of aluminium scrap |
| 09/26/1989 | US4869750 Baffle to cause agglomeration of particles |
| 09/26/1989 | CA1261145A2 Recovery of non-ferrous metals from dross |
| 09/20/1989 | EP0333586A1 Apparatus for removing gaseous and solid impurities from a molten product contained in a vessel |
| 09/19/1989 | US4867422 Rotary device, apparatus and method for treating molten metal |
| 09/13/1989 | EP0332292A1 Rotary device, apparatus and method for treating molten metal |
| 08/29/1989 | US4861565 Method of separately recovering metal values of petroleum refining catalyst |