新型抑制剂DLW-4用于鞍千公司混磁精反浮选

为检验东北大学自主合成的新型抑制剂DLW-4的性能及效果,对鞍钢集团鞍千矿业公司磁选混合精矿(MMC)进行了反浮选条件试验及1粗1精3扫、中矿顺序返回的反浮选闭路试验。结果表明,在浮选温度为40℃、粗选Na OH用量为800 g/t、抑制剂DLW-4为342 g/t、活化剂Ca Cl2为600 g/t、捕收剂RA-715为480 g/t时选别指标最佳。对铁品位为47.74%的磁选混合精矿经1粗1精3扫闭路试验,获得了铁品位为68.08%、回收率为88.20%的铁精矿。与常规淀粉抑制剂相比,DLW-4可以以更少的药剂用量获得更好的反浮选指标,具有推广价值。

Application of a New Depressor DLW-4 to Reverse Flotation of the Magnetic Mixed Concentrate from Anqian

In order to test the properties and floating behavior of a new depressor DLW-4 synthesized by Northeastern University，one roughing-one cleaning-three scavenging flotation process was conducted on the Magnetic Mixed Concentrate (MMC）of Anqian Mining Company in Anshan Iron and Steel Group.The results indicated that，at the slurry temperature of 40 ℃，optimum separation index could obtained with NaOH dosage of 800 g/t，depressor DLW-4 of 342 g/t，activator CaCl₂ dosage of 600 g/t，collector RA-715 of 480 g/t.Iron concentrate with iron grade of 68.08% and recovery of 88.20% is obtained via one roughing-one cleaning-three scavenging closed circuit flotation operation to dealing with MMC，Fe grade of which is 47.74%.Compared with regular depressor starch，DLW-4 could gain better reverse flotation indexes with relative fewer reagent dosage，and thus have promotional value.