低品位氧化锌矿硫化-胺法分选试验

Research on Separation for Low-grade Oxidized Zinc Ore with Sulfurization-Amine

随着大量易选硫化锌矿资源的不断消耗,细粒难选低品位氧化锌矿逐渐成为重要原料。本文针对云南兰坪大量低品位氧化锌矿石,其含锌6.52%,锌的氧化率94.62%,采用硫化-胺法浮选工艺流程,研究了磨矿细度、药剂种类、药剂用量等因素对锌浮选过程的影响。在磨矿细度为-0.074mm 90%时采用一次粗选两次扫选三次精选的闭路流程,获得锌精矿产率9.70%,Zn品位44.09%,Zn回收率66.35%较好指标。本研究对我国低品位氧化锌矿资源的开发利用具有重要借鉴意义。

With the continuous depletion of a large number of easy-treatment zinc sulfide ore, the fine disseminated and refractory low-grade zinc oxide ore has become an important source for the production. In this paper, a sulfurization- amine flotation process was studied for large amounts of low-grade zinc oxide ore in Lanping area, Yunnan Province, China and the influencing factors have been studied, such as grinding fineness, reagent types and dosage, etc. Under the grinding fineness of-0.074 mm （90%）, a closed-circuit test with one stage roughing flotation, two stage scavenging, and three stage concentration flotation was carried out. The experiment results indicate that for the run-of-mine ore with a zinc grade of 6.52% and the oxidation ratio of 94.62%, zinc concentration can be obtained with zinc grade of 44.09% at a zinc recovery of 66.35 % and 9.70% for fine zinc concentration yield.