用新型捕收剂DA-1反浮选齐大山选厂混磁精

摘要

An amphiprotic collector DA-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 20℃ ,pH of pulp 11. 5,dosage of DA-1 600 g/t,and dosage of depressor gelatinization starch 600 g/L At appropriate technical conditions,a closed circuit flotation flowsheet of single-stage roughing,two-stage scavenging,and middles returning was adopted to handle a mixed magnetic concentrate with Fe 42. 92%. A concentrate of Fe concentrate grade 67. 31% and recovery 87. 90% was obtained.%采用东北大学新合成的两性捕收剂DA -1,对鞍钢齐大山选矿厂混磁精矿进行了反浮选条件试验,确定的适宜的粗选作业条件为浮选温度20℃,矿浆pH=11.5,捕收剂DA -1用量600 g/t,抑制剂糊化淀粉用量为600 g/t;在适宜的工艺技术条件下,采用1粗2扫、中矿顺序返回的闭路流程处理铁品位为42.92％的混磁精矿,获得了铁品位为67.31％,回收率为87.90％的精矿产品.