新型阴离子捕收剂DZN-1对齐大山选厂混磁精的反浮选试验研究

Reverse flotation of the mixed magnetic concentrate of Qidashan dressing plant in Anshan by a novel anion collector DZN-1

采用东北大学新合成的阴离子捕收剂DZN-1,对鞍钢齐大山选矿厂混磁精矿进行了浮选条件试验,确定的适宜的粗选作业条件为:浮选温度为25℃,矿浆pH值为11.5,捕收剂DZN-1用量800g/t,活化剂CaCl2用量200g/t,抑制剂羧甲基淀粉用量600g/t;在适宜的工艺技术条件下,采用一粗一扫、中矿返回的闭路流程处理铁品位为46.02%的混磁精矿,获得了铁品位为65.38%,精矿回收率为89.56%的精矿。试验结果表明,新型捕收剂DZN-1的特点是活化剂用量少且在较低温度下具有较好的选择性。

An anion collector DZN-1 synthesized by Northeastern University was used to float the mixed magnetic concentrate of Qidashan dressing plant in Anshan Iron and Steel Company. The optimal rougher floatation condition is flotation temperature 25℃, pH of pulp 11.52, dosage of DZN-1 800 g/t, dosage of depressor CaCl2 200 g/t, and dosage of depressor carboxymethyl starch 600 g/t. At appropriate technical conditions, a closed circuit flotation flowsheet of single-stage roughing, single-stage scavenging, and middles returning was adopted to handle a mixed magnetic concentrate with Fe 46.02 %. A concentrate of Fe concentrate grade 65.38 % and recovery 89.56 % was obtained. Test results showed that the characteristics of the anion collector DZN-1 are less activator dosage, lower flotation temperature, and better collecting ability.