从含碲金矿中综合回收金、银、碲的试验研究

对河南某含碲金矿石进行了尼尔森重选单因素试验和重选尾矿再浮选试验。在磨矿细度-0.074 mm粒级占60%、给矿浓度25%、离心力强度50g、给矿速度900 g/min条件下获得重选精矿,在磨矿细度-0.074 mm粒级占70%、矿浆pH值为8、捕收剂异戊基黄药用量120 g/t条件下对重选尾矿进行一粗一扫浮选,重选和浮选的合并精矿金、银、碲品位分别为32.88 g/t、39.94 g/t和94.35 g/t,金、银、碲总回收率达到了89.97%、86.48%和81.29%,实现了金、银、碲的有效回收。

Comprehensive Recovery of Gold,Silver and Tellurium from Tellurium-bearing Gold Ore

Single factor test of Nielsen gravity separation(GS) and flotation test of GS tailings were conducted to beneficiate a tellurium-bearing gold ore from Henan Province. The GS concentrate was obtained under the optimized conditions including a grinding fineness of -0.074 mm 60%, feed concentration of 25%, a relative centrifugal force of 50g and a feed speed of 900 g/min. Then, the GS tailings at a grinding size of -0.074 mm 70% was treated with a flotation process consisting of one stage of roughing and one stage of scavenging, with 120 g/t isoamyl xanthate as the collector and a pulp pH value at 8. The combined concentrate from GS and flotation assayed 32.88 g/t Au, 39.94 g/t Ag and 94.35 g/t Te with recoveries of 89.97% Au, 86.48% Ag and 81.29% Te. It is shown that this approach can efficiently reclaim gold, silver and tellurium resources.