自焙槽湿法净化的回收料是氧化铝、固体氟化盐、再生冰晶石、碳和焦油沥青等多种成分的混合料。采用塔内合成流程时,回收料中含碳及焦油沥青高达30～35％(其中焦油沥青为2～3％),整个物料呈灰黑色。这样的混合料直接返回电解槽使用,目前还有一定的困难。如何提高回收料的质量,真正达到“化害为利、综合利用”的目的,是推广湿法净化工艺的一个关键问题。为了提高回收料的质量,必须把碳和焦油沥青分离出去。其分离方法目前国内外尚无成 The self-roasting tank wet-cleaning recovered material is a mixture of various components such as alumina, solid fluoride salt, regenerated cryolite, carbon and tar pitch. The tower synthesis process, the recovery of carbon and tar asphalt as high as 30 to 35% (of which 2 to 3% tar pitch), the entire material was gray-black. Such a mixture directly returned to the use of electrolyzer, there are still some difficulties. How to improve the quality of recycled materials, and truly achieve the “harm for the benefit of comprehensive utilization” purposes, is to promote the wet purification process is a key issue. In order to improve the quality of recycled materials, carbon and tar pitch must be separated. The method of separation is not available at home and abroad