关键词: 钨矿石, 伴生铜锌, 螺旋分级机, 高频振动细筛, 单体解离, 浮选

Abstract: A tungsten ore in Jiangxi is associated with Tin， copper and zinc， which were enriched by gravity-concentration. After floating with mixed concentrate， the comprehensive sulfide ore containing copper and zinc was obtained. With grinding fineness of -200 mesh 43.72% after treating with ball grinding and spiral classifier， copper concentrate was obtained only with copper grade 18.92%， zinc grade 4.29%， and copper recovery rate 96.77%; Zinc concentrate was obtained with zinc grade 33.17%， copper grade 2.79%， and zinc recovery rate 21.97%. The copper-zinc separation effect was not ideal on account of the low monomer liberation degree. High-frequency vibrating fine screen， instead of spiral classifier， was used to solve the problem on the basis of on-site exploration tests and analysis of the reason for the low monomer liberation degree. On the condition that the hole width of high-frequency vibrating fine mesh screen was 0.125 mm and feeding fineness of sample in the flotation was -200 mesh 70.58%， copper grade reached 25.46%， zinc grade reduced to 2.51%， and copper recovery rate increased to 98.28% with copper concentrate; Zinc grade reached 45.50%， copper grade reduced to 0.82%， and zinc recovery rate increased to 57.43% with zinc concentrate. Copper concentrate was upgraded from the fourth grade to the second grade and copper recovery rate increased by 1.51 percentage points; Zinc concentrate was upgraded from the nonconforming products to the seventh grade and zinc recovery increased by 35.46 percentage points. The improvement of production indexes， economic and environmental benefits of the company were very significant.

Key words: Tungsten Ores, Associated copper and zinc, Spiral classifier, High-frequency vibrating fine screen, Monomer liberation, Flotation