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当硫酸烧渣的铁含量提至约60%时,其可作为炼铁原料。因此,就硫酸烧渣生产炼铁用氧化球团进行了研究。研究结果表明,如果硫酸烧渣中铁含量达约60%,经几十分钟细磨后,和磁铁矿粉、添加剂混合后可满足生产氧化球团的原料要求;细磨硫酸烧渣比例<65%时,其造粒球团的各项指标能达竖炉和高炉的生产要求。烘干球平均抗压强度均在100 N以上,烘烤球平均抗压强度在120 N以上,焙烧球抗压强度均在4 000 N以上。
When the iron content of sulfuric acid cinder slag increased to about 60%, it can be used as ironmaking raw materials. Therefore, the production of sulfuric acid slag iron oxide pellets were studied. The results show that if the content of iron in the slag is about 60%, the raw material of the oxidized pellets can be satisfied by mixing with the magnetite powder and the additive after finely grinding for several ten minutes; the proportion of the finely ground sulfuric acid slag <65 %, The pelletizing pellets can meet the requirements of shaft furnace and blast furnace production. The average compressive strength of the dried balls was above 100 N, the average compressive strength of the baked balls was above 120 N, and the compressive strength of the baked balls was above 4 000 N.