公开(公告)号：US4568430A

公开(公告)日：1986-02-04

申请号：US697964

申请日：1985-02-04

Applicant: Sylvestre Vire

Inventor： Sylvestre Vire

IPC: C25C3/24 ,  C22B21/00 ,  C22B21/06 ,  C25C3/06

CPC classification number: C22B21/0092 ,  C22B21/066 ,  Y02P10/218

Abstract: A salt melt of alkali and/or alkali earth chlorides and fluorides, heated to 50.degree.-100.degree. C. above the melting point is employed to purify heavily contaminated scrap aluminum. The scrap aluminum, preheated to 400.degree.-500.degree. C. is added to a melting or holding furnace containing the less dense salt melt, the mixture stirred if necessary and then held at the above mentioned melt temperature for at least one hour. First the sedimented metal phase, then the salt melt are filtered through a resistant open pore ceramic filter and thus freed of solid impurities. The aluminum is transferred to an electrolytic cell for purification, and the molten salt melt recycled.

Abstract translation: 使用碱和/或碱土类氯化物和氟化物的盐溶液，加热到高于熔点的50℃-100℃，以净化严重污染的废铝。 将预热至400-500℃的废铝加入到含有较不致密的盐熔体的熔化或保温炉中，如果需要，将混合物搅拌，然后保持在上述熔融温度下至少1小时。 首先沉淀金属相，然后通过耐开孔陶瓷过滤器过滤盐溶液，从而消除固体杂质。 将铝转移到电解池中进行纯化，并将熔融盐熔融再循环。