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选取低品位、多组分磁性铁矿物转炉初炼钢渣,设计适用于细粒钢渣处理的多级辊式磁选机,开展了不同磨矿粒度下单级磁辊粗选及多级磁辊精选试验,对比了磁辊转频、分选行程对各粒度钢渣精矿品位及回收率的影响。结果表明:精选精矿品位明显高于粗选精矿品位,回收率略低;磁辊转频影响回收率较为明显,分选行程两边取值对磁选指标影响程度明显高于中间取值;磨矿粒度越细,磁选机综合处理效果越好;磨矿粒度小于0.3 mm粒级的占90%,精选精矿品位比原矿品位提高约32个百分点。
Select low-grade, multi-component magnetic iron ore converter steelmaking slag, designed for the treatment of fine-grained steel slag multi-stage roller separator, carried out under different grinding particle size single-stage magnetic roller roughing and multi-level magnetic Roller selection test, compared with the magnetic roller frequency, sorting stroke on the size of steel slag concentrate grade and recovery rate. The results showed that the concentrate grade of concentrate was obviously higher than that of concentrate and the recovery rate was slightly lower. The recovery rate of magnetic roller frequency conversion was more obvious. The influence of both sides of sorting stroke on the magnetic separation index was obviously higher than that of middle selection ; The finer grinding particle size, the better the comprehensive effect of magnetic separator; grinding particle size of less than 0.3 mm accounted for 90% of the grain size, concentrates concentrate grade than the ore grade increased by about 32 percentage points.