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1. 发明申请

US20070215483A1 METHOD FOR ELECTROLYTIC PRODUCTION AND REFINING OF METALS 有权
标题翻译：电解生产和金属精炼方法
公开(公告)号：US20070215483A1
公开(公告)日：2007-09-20
申请号：US11682457
申请日：2007-03-06
申请人： Kai JOHANSEN , Donald R. SADOWAY , Bjorn MYHRE , Marianne ENGVOLL , Krister ENGVOLL
发明人： Kai JOHANSEN , Donald R. SADOWAY , Bjorn MYHRE , Marianne ENGVOLL , Krister ENGVOLL
IPC分类号： C25B1/00 , C25C3/36
CPC分类号： C25B1/006 , C25C3/00 , C25C3/28 , C25C3/34
摘要： The present invention relates to a method for electrolytic production and refining of metals having a melting point above about 1000° C., particularly silicon, where there is provided a first electrolytic cell having an upper molten electrolyte layer of a first electrolyte, a lower molten alloy layer of an alloy of the metal to be refined and at least one metal more noble than the metal to be refined. The lower alloy layer is the cathode in the first cell and an anode is positioned in the upper molten electrolyte layer. A second electrolytic cell is also provided with an upper molten metal layer of the same metal as the metal to be refined, said layer constituting a cathode, a lower molten alloy layer, said lower layer constituting an anode, said alloy having a higher density than the metal to be refined, and an intermediate molten electrolyte layer having a density between the density of the upper and lower molten layers. Both electrolytes are oxide based electrolytes containing oxide of the metal to be refined, and the electrolyte is in molten state and has a melting point below the operating temperature of the process. Raw material comprising an oxide of the metal to be refined is added to the first cell and direct electric current is passed through the anode to the cathode such that the metal to be refined is moved from the anode and deposited in molten state at the cathode. The two cells can be operated in two separate steps. One to produce an alloy and the other to refine metal from the alloy.
摘要翻译：本发明涉及熔点高于约1000℃的金属，特别是硅的电解生产和精炼方法，其中提供了具有第一电解质的上部熔融电解质层的第一电解槽，要被精炼的金属的合金的合金层和比待精炼的金属更贵的至少一种金属。下合金层是第一电池中的阴极，阳极位于上部熔融电解质层中。第二电解槽还设置有与待精炼的金属相同的金属的上部熔融金属层，所述层构成阴极，下部熔融合金层，所述下层构成阳极，所述合金的密度高于待精炼的金属，以及具有上下熔融层的密度之间的密度的中间熔融电解质层。两种电解质都是含有待精炼金属的氧化物的基于氧化物的电解质，电解质处于熔融状态，熔点低于工艺的工作温度。将包含待精炼金属的氧化物的原料加入到第一电池中，直接电流通过阳极进入阴极，使得待精炼的金属从阳极移动并在阴极处以熔融状态沉积。两个电池可以在两个单独的步骤中操作。一种是生产合金，另一种是从合金中精炼金属。

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