一、前言我厂1800KVA电炉生产的75硅铁含铝一般在1.9—2.7％之间,大部分产品不符合出口硅铁的质量要求(Al<2％)。硅铁中的铝,大多来自焦炭。据计算,我厂每炼一吨75硅铁,由焦炭带入的铝约27.5公斤,占带入总量的82％,由硅石带入的铝约6公斤,占带入总量的18％。脱铝前,硅铁 I. Preface 75% of ferrosilicon aluminum produced by 1800KVA electric furnace in our factory is generally between 1.9-2.7%. Most of the products do not meet the quality requirements of export ferrosilicon (Al <2%). Ferrosilicon, mostly from coke. It is calculated that for each ton of 75 ferrosilicon I make, about 27.5 kilograms of aluminum is brought into the coke, which accounts for 82% of the total amount brought in. Silica takes about 6 kilograms of aluminum, accounting for 18% . Before dealumination, ferrosilicon