低铝铝灰中单质Al质量分数小于5％,循环再利用性较差.对其用于钢包渣改质剂的可行性做了试验,发现铝灰中除单质Al外,AlN也是一种还原剂.试验采用渣钢比1∶10放入MgO坩埚中加热到1 600℃,将铝灰和石灰与萤石按4∶6∶1混合后加入坩埚中,保温90min后自然冷却.试验结果表明低铝铝灰具有很好的还原性,可将钢包渣中w((FetO))由31.17％降低至3.24％,钢中w([O])由480×10-6降低至17×10-6,钢中w([S])由190×10-6降低至75×10-6,但该过程会造成钢液增[N],w([N])由66×10-6增至129×10-6.
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