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1.发明授权METHOD AND REACTOR FOR PRODUCTION OF ALUMINUM BY CARBOTHERMIC REDUCTION OF ALUMINA 有权方法和反应堆铝生产BY卡博热铝电解
公开(公告)号：EP1604048B1
公开(公告)日：2009-04-08
申请号：EP04711143.0
申请日：2004-02-13
申请人： Alcoa Inc. , Elkem AS
发明人： AUNE, Jan, Arthur , JOHANSEN, Kai
IPC分类号： C22B21/02
摘要： A hollow partition wall (4) is employed to feed carbon material to an underflow of a carbothermic reduction furnace used to make aluminum. The partition wall (4) divides a low temperature reaction zone (2) where aluminum oxide is reacted with carbon to form aluminum carbide and a high temperature reaction zone (3) where the aluminum carbide and remaining aluminum oxide are reacted to form aluminum and carbon monoxide.
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公开(公告)号：EP1999286A2
公开(公告)日：2008-12-10
申请号：EP07758136.1
申请日：2007-03-08
申请人： Elkem AS
IPC分类号： C22B15/00
摘要： The present invention relates to a method for electrolytic production and refining of metals having a melting point above about 1000 0C, 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.
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公开(公告)号：EP1999301A2
公开(公告)日：2008-12-10
申请号：EP07757262.6
申请日：2007-02-21
申请人： Elkem AS
发明人： AUNE, Jan Arthur , FROMMEYER, Georg , JOHANSEN, Kai , SADOWAY, Donald R. , SOLENG, Gro , THISTED, Elke Willam
摘要： The present invention relates to a dimensionally stable oxygen-evolving anode for use in an electrolytic cell for the production of aluminium. The anode comprises of a container made from an alloy comprising aluminium and at least one metal more noble than aluminium; a fluid bath in the bottom of the container having the ability to dissolve aluminium, said fluid having a density that is higher than the density of molten aluminium at the operating temperature of the cell, a pool of molten aluminium floating on top of the fluid bath in the bottom of the container; a refractory layer arranged on the inner sidewalls of the container at least in the area of the pool of molten aluminium, said refractory layer protecting the molten aluminium from contacting the inner sidewalls of the container.
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5.发明公开ELECTRODE ARRANGEMENT AS SUBSTITUTE BOTTOM FOR AN ELECTROTHERMIC SLAG SMELTING FURNACE 审中-公开电极装置的替代品用于地面电热炉上
公开(公告)号：EP1671072A2
公开(公告)日：2006-06-21
申请号：EP04781525.3
申请日：2004-08-17
申请人： Alcoa Inc. , Elkem AS
CPC分类号： F27D11/08 , C22B4/08 , C22B21/02 , F27B3/085 , H05B7/148 , Y02P10/256 , Y02P10/259
摘要： The electrode arrangement uses vertically oriented electrodes (4) with side wall contacts (7) for an electrothermic smelting furnace (1) for aluminum production. The side wall contacts (7) are radially moveable into the furnace (1) to compensate for wear on the contacts. The side wall contacts (7) can be hollow to allow a slag forming charge to be fed to the furnace (1). The arrengements of contacts at the side wall increases the life of the bottom lining.
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6.发明公开METHOD AND REACTOR FOR PRODUCTION OF ALUMINUM BY CARBOTHERMIC REDUCTION OF ALUMINA 有权方法和反应堆铝生产BY卡博热铝电解
公开(公告)号：EP1604048A1
公开(公告)日：2005-12-14
申请号：EP04711143.0
申请日：2004-02-13
申请人： Alcoa Inc. , Elkem AS
发明人： AUNE, Jan, Arthur , JOHANSEN, Kai
IPC分类号： C22B21/02
摘要： A hollow partition wall (4) is employed to feed carbon material to an underflow of a carbothermic reduction furnace used to make aluminum. The partition wall (4) divides a low temperature reaction zone (2) where aluminum oxide is reacted with carbon to form aluminum carbide and a high temperature reaction zone (3) where the aluminum carbide and remaining aluminum oxide are reacted to form aluminum and carbon monoxide.
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