油酸钠体系中微细粒赤铁矿的浮选行为

摘要

Flotation behavior of ultrafine hematite and the effect of five types of depressors ( sodium hexametaphos-phate, sodium silicate, sodium pyro-phosphate, starch, sodium humate)on ultrafine hematite recovery in NaOl flotation system were researched. The results show that ultrafine hematite reaches to good floatability when the concentration of sodium oleate is 4 x 10 -4 mol/L and pH value is 10. The five types of depressors all have obvious depression on ultrafine hematite flotation, organic depressors have a better depression effect than inorganic depressors, and the depression effects of the five depressors are in the order of starch > sodium humate > sodium pyro-phosphate > sodium hexametaphosphate > sodium silicate.%通过单矿物浮选试验,研究了油酸钠体系中微细粒赤铁矿的浮选行为,并考察了六偏磷酸钠、硅酸钠、焦磷酸钠、淀粉、腐植酸钠这5种抑制剂对微细粒赤铁矿可浮性的影响.结果表明:在油酸钠浓度为4 × 10-4mol/L、pH=10时,微细粒赤铁矿的浮选效果最佳.5种抑制剂对微细粒赤铁矿均表现出明显的抑制作用,它们抑制能力的强弱排序为淀粉＞腐植酸钠＞焦磷酸钠＞六偏磷酸钠＞硅酸钠.