摘要
针对某难分选的铜锌矿石,提出一种混合浮选—氧化焙烧—选择性浸出—铜、锌电积选冶联合新工艺。先后完成了试验室、扩大规模和半工业试验研究,取得了较为满意的结果。新工艺简化了选矿流程,混合浮选的铜、锌选矿总回收率比原分选工艺分别提高了2 4%和44 8%;从混合精矿到产出一号电铜和电锌,铜、锌回收率均达92 5%以上,镉、钴、银等有价金属可进一步回收利用;而且铜锌电积或铜萃取产生的酸可全部返回使用。
For a certain refractory Cu-Zn ore,a new process of bulk flotation-oxidizing roasting-selective leaching-Cu-Zn electrowinning is proposed.Laboratory and pilot-plant-scale tests have been conducted and satisfactory results are achieved.With this process,over-all recoveries for bulk flotation of copper and zinc are increased by 2.4% and 44.8% respectively as compared with using original process and the recoveries of copper and zinc from blended concentrate to production of 1~# cathode copper and zinc are over 92.5%.In addition,such valuable metals as cadmium,cobalt and silver can be recovered and the acid from Cu-Zn electrowinning or solvent extraction can be recycled.
关键词
铜锌混合矿
混选
氧化焙烧
浸出
电积
Cu-Zn complex ore
Bulk flotation
Oxidizing roasting
Leaching
Electrowinning
