云南某难选泥质金矿石浮选试验研究

云南某金矿石中的金矿物主要以自然金的形式存在，自然金的颗粒细小，属于微细粒金，且与脉石关系密切，同时矿石中又含有一定量的粘土矿物，对分选不利。对该矿石采用浮选法富集金矿物，采用Na2CO3作为矿浆pH值调整剂，水玻璃和六偏磷酸钠作为组合抑制剂，异戊基黄药和丁胺黑药为混合捕收剂，实现了含金矿物与脉石矿物有效的分离。在原矿金品位为3．15g／t的条件下，获得了精矿金品位为63．21g／t，金回收率为89．30％的良好试验指标，可望为类似金矿石的分选提供了一种新途径。

Experimental Study on Flotation of a Refractory Argillaceous Gold Ore in Yunnan

The gold mineral in a gold ore in Yunnan exists in native gold form, which is very fine and associated with gangue minerals closely; the ore contains some clay mineral which is had for separation. Flotation method is adopted for enrichment of gold mineral, Na2CO3 acted as the pH value regulator, water glass and sodium hexametaphosphate acted as the combined depressants, sodium isoamylxanthate and butylamine aerefloat acted as the mixed collector, so that the auriferous minerals and gangue mineral are separated effectively. The good experimental indicators show that the gold grade of concentrate is 63.21 g/t with recovery of 89. 30% when the raw ore＇ s gold grade is 3. 15 g/t. It is expected that a new method for the similar gold ore separation may become a choice.