目前,氧化铝生产的废料赤泥仍弃之堆场。赤泥中含有较多的铁和少量二氧化硅,因此有可能用于高炉熔炼。然而,用赤泥代替富铁精矿(SiO_2为4～7,Fe为60～65％时)会增加出渣量和消耗过量焦炭,如果这些损失不能为提高烧结料的强度所弥补的话,甚至还会降低高炉熔炼效率。 At present, the red mud produced by alumina is still abandoned. Red mud contains more iron and a small amount of silica, so it is possible for blast furnace melting. However, the use of red mud instead of iron-rich concentrates (4 to 7 for SiO 2 and 60 to 65% for Fe) increases the amount of slag and consumes excess coke, and even if these losses do not make up for the increase in the strength of the sinter, Will reduce the blast furnace melting efficiency.