添加赤铁矿对碱性球团性能的影响

通过向碱度为1的球团矿中配加不同比例赤铁矿,探究赤铁矿的加入对碱性球团性能的影响.试验结果表明,随着赤铁矿的配比由0％提高到40％,生球落下强度提高、抗压强度变化不明显;焙烧球团矿的抗压强度下降,由未加赤铁矿的2 460 N/P降低到含40％赤铁矿的1 890 N/P;成品球内部孔隙率由25.84％下降到21.45％,...

Effect of adding hematite on properties of alkaline pellets

By adding different proportions of hematite to the pellets with basicity of 1, the influence of hematite on the properties of basic pellets was investigated. The experimental results showed that with the increase of hematite ratio from 0% to 40%, the drop strength of green pellets increased and the compressive strength of pellets changed little. The compressive strength of finished pellets decreased from 2 460 N/P without hematite to 1 890 N/P with 40% hematite, the internal porosity of finished pellets decreased from 25.84% to 21.45%, and the average pore diameter increased from 2 184.7 to 3 937.9 nm. Through microscopic observation, it was found that the crystal structure formed by recrystallization of hematite was looser and the crystal connection was weaker than that formed by magnetite solid-phase consolidation. The addition of hematite significantly improved the reduction expansion rate of basic pellets, which decreased from 30.45% to 13.23%. In general, it was feasible to add hematite to the pellets with an alkalinity of 1.