公开(公告)号：US4099959A

公开(公告)日：1978-07-11

申请号：US799762

申请日：1977-05-23

申请人： Ernest William Dewing ,  Jean-Paul Robert Huni ,  Raman Radha Sood ,  Frederick William Southam

发明人： Ernest William Dewing ,  Jean-Paul Robert Huni ,  Raman Radha Sood ,  Frederick William Southam

IPC分类号： C22B4/02 ,  C22B5/10 ,  C22B21/02

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。

公开(公告)号：US3951328A

公开(公告)日：1976-04-20

申请号：US620112

申请日：1975-10-06

申请人： Eric Robert Wallace ,  Ernest William Dewing

发明人： Eric Robert Wallace ,  Ernest William Dewing

IPC分类号： B23K35/28 ,  B23K35/36 ,  B23K31/02

CPC分类号： B23K35/286 ,  B23K35/3605

摘要： In methods of joining metal surfaces involving heating to a temperature above about 560.degree.C, the use of a flux comprising a mixture of potassium fluoaluminates. Particularly for brazing aluminum, a flux consisting essentially of potassium fluoaluminate complexes (e.g. KAlF.sub.4 and K.sub.3 AlF.sub.6) may be employed, having a composition corresponding to an AlF.sub.3 /KF ratio, in parts by weight, between about 65:35 and about 45:55. The flux is essentially free of unreacted potassium fluoride and may be in divided solid form.

摘要翻译： 在将加热到高于约560℃的金属表面接合的方法中，使用包含氟铝酸钾混合物的助熔剂。 特别是对于钎焊铝，可以使用基本上由氟铝酸钾络合物（例如KAlF 4和K 3 AlF 6）组成的助熔剂，其组成对应于AlF 3 / KF比，重量份为约65:35至约45:55。 助熔剂基本上不含未反应的氟化钾，并且可以是分开的固体形式。