提高某难选金矿石金精矿品位的浮选试验研究

某难选金矿石含金1.97 g/t,矿物组分复杂,独立金矿物嵌布粒度细,主要载金矿物黄铁矿嵌布粒度粗细不均,同一种矿物少部分是载金矿物而大部分为不含金矿物,导致金精矿不含金杂质矿物含量高,金精矿品位较低。为提高该金精矿品位,采用高效捕收剂MA与丁基铵黑药组合,金精选添加适量的分散剂六偏磷酸钠,通过一次粗选、两次精选、两次扫选的闭路试验流程,最终获得金精矿含金50.51 g/t、含银1 180.8 g/t,金回收率为93.96%、银回收率为90.13%。金精矿中金品位得到有效提高。

Experimental Study on Increasing Gold Concentrate Gradeof a Refractory Gold Ore

A refractory gold ore contains 1.97g/t Au featured complex mineral component, independent gold minerals existing in fine granular and uneven particle size distribution of gold-bearing minerals like pytite, besides the same mineral had a minor share contained gold while most not contained gold. So that the gold concentrate has high impurity content with low grade. In order to increase the grade of the gold concentrate, the high efficiency collector MA in combination to butyl ammonium sulfate was adopted and the dispersant calgon was used in the cleaning. By one roughing, two cleaning and two scavenging, at last the gold concentrate was obtained containing 50.51g/t Au and 1080g/t with Au recovery 93.96%, Ag recovery 90.53%. The grade of concentrate was improved effectively.