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钢渣中含有大量能够循环利用的钙、铁、镁等成分,替代熔剂用于烧结过程是钢渣循环利用的重要途径之一。为提高钢渣在烧结过程中的使用比例,回收利用钢渣中的有用成分,采用XRD、矿相显微镜、微型烧结装置和烧结杯装置对某钢厂转炉钢渣进行了替代烧结白灰的试验研究。结果表明,钢渣的矿物组成主要是RO相(MgO、FeO和MnO的固溶体)、硅酸二钙、硅酸三钙等;钢渣作为熔剂用于烧结能够促进液相生成,提高液相流动性;钢渣搭配优质白灰替代部分低质白灰能够提高烧结矿的成品率和平均粒径,降低固体燃耗。
Slag contains a large number of recyclable calcium, iron, magnesium and other ingredients, instead of flux for the sintering process is one of the important ways steel recycling. In order to improve the proportion of steel slag in the process of sintering, the useful components in steel slag were recovered and reused, and the alternative sintering of lime was carried out by using XRD, phase microscope, micro-sintering equipment and sintering cup equipment. The results show that the mineral composition of the steel slag is mainly RO phase (solid solution of MgO, FeO and MnO), dicalcium silicate, tricalcium silicate, etc .; steel slag as a flux for sintering can promote liquid phase formation and improve the fluidity of liquid phase; Slag with high-quality white ash to replace some of the low-quality white ash can improve the sinter yield and average particle size, reduce the solid fuel consumption.