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

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。

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

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.