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公开(公告)号：US4099959A
公开(公告)日：1978-07-11
申请号：US799762
申请日：1977-05-23
CPC分类号： C22B21/02 , Y10S75/959 , Y10S75/961
摘要： In a process for the production of aluminium a molten alumina slag, containing combined carbon is circulated through one or more alternately arranged relatively low temperature zones where carbon is added to increase the combined carbon content of the slag by reaction with the alumina slag and high temperature zones where aluminium metal is released by reaction of aluminium carbide and alumina in the slag with consequent depletion of the combined carbon content. Alumina is supplied to the slag at one or more locations. The energy to drive the reactions is preferably supplied by resistance heating of the slag particularly in transit from a low temperature zone to a high temperature zone although usually additional energy is supplied to the slag in the return from a high temperature zone to the next low temperature zone.In most instances the aluminium-liberating reaction is carried out in an upwardly inclined passage and the gas evolved is employed to achieve the circulatory movement of the slag. It is a preferred feature to scrub the gas with carbon without admixed alumina to avoid formation of sticky aluminium oxycarbide in the carbon, which is subsequently added as process charge.
摘要翻译： 在生产铝的过程中，含有组合碳的熔融氧化铝炉渣通过一个或多个交替布置的相对低温区域循环，其中加入碳以通过与氧化铝炉渣的反应来增加炉渣的组合碳含量，并且高温 通过在炉渣中碳化铝和氧化铝的反应而释放铝金属的区域，从而导致组合碳含量的消耗。 在一个或多个位置将氧化铝供应到炉渣。 驱动反应的能量优选通过炉渣的电阻加热来提供，特别是在从低温区域转移到高温区域的过程中，尽管在从高温区到下一个低温的回流中通常向炉渣供给额外的能量 区。
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公开(公告)号：US07927518B2
公开(公告)日：2011-04-19
申请号：US11933526
申请日：2007-11-01
CPC分类号： C25C3/08 , C01B35/04 , C01B35/10 , Y10T428/2982
摘要： The invention relates to a metal boride precursor mixture comprising a metal oxide and a boric oxide combined in such a manner so as to produce intimately linked clusters wherein the boric oxide is found within the metal oxide. Furthermore, the invention discloses a carbon composite material made with the metal boride precursor mixture and a carbonaceous component. Finally, the invention also teaches the process for preparing the metal boride precursor mixture comprising steps of providing a metal oxide and a boron oxide, mechanically mixing the metal oxide and the boron oxide at a temperature that liquefies the boron oxide and may impregnate the metal oxide to produce an intimately linked cluster of metal oxide and boric oxide.
摘要翻译： 本发明涉及包含金属氧化物和氧化硼的金属硼化物前体混合物，其以这样的方式组合以产生紧密连接的簇，其中在氧化物内部存在氧化硼。 此外，本发明公开了一种由金属硼化物前体混合物和碳质成分制成的碳复合材料。 最后，本发明还教导了制备金属硼化物前体混合物的方法，包括以下步骤：提供金属氧化物和氧化硼，在液化氧化硼的温度下机械混合金属氧化物和氧化硼，并可浸渍金属氧化物 以产生紧密连接的金属氧化物和氧化硼簇。
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