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1983年在联邦德国的托吉尼,联邦德国联合铝制品公司的铸造车间每年产生约1000公吨的炉渣.从炉渣回收铝的一般方法是把炉渣撒在炉外的混凝土地上进行冷却,手工把大块的金属挑选出来,然后把剩余的冷的炉渣放入一般球磨机内将氧化物破碎,随后把所获得的金属放入感应炉内进行重熔.其富渣的炉渣做为废料送去再处理.从每公吨热炉渣回收铝的总量为280公斤,其回收率约为28%.这种方法没有获得最大的效益,相反,由于可回收的铝被燃烧成氧化物和铝热反应
Approximately 1,000 metric tons of slag are produced annually in Tojini, Federal Republic of Germany, and in the foundry of Federal Germany Alcoa, Inc. in 1983. The usual method of recovering aluminum from slag is to deposit the slag on the concrete floor outside the furnace and cool it by hand The metal of the block is picked out and then the remaining cold slag is put into a general ball mill to crush the oxide and then the obtained metal is melted into an induction furnace for remelting.The slag-rich slag is sent as reprocessing . The total recovery of 280 kg of aluminum per metric ton of hot slag is about 28%, which is not the most profitable. Conversely, since recoverable aluminum is burned into oxides and pyrolytic reactions