煤金团聚法回收金机理初探

介绍了煤金团聚法（Coal Cold Agglomeration，CGA）的研究现状，讨论了影响煤金油团聚的几个主要因素，如煤化学、中性油的特性、疏水颗粒间的相互作用等。在此基础上，研究搅拌强度和接触时间对CGA金回收动力学的影响，发现在其他条件不变的情况下，同一矿种在不同的搅拌速度下，金回收动力学速率常数是一定的。筛选出的煤、油混合的聚团很好的无捕收剂捕金能力，金回收率可达77％～86％。进一步实验研究发现添加适量的硫化钠调整剂对含硫化物原生金矿中金有较好的活化作用，金回收率有显著提高，而硫化物的上浮却有所降低。

Preliminary Study on the Mechanism of Gold Recovery Using the Coal Gold Agglomeration Process

In this article, the research status of the coal gold agglomeration (CGA) were introduced and a few major factors affecting coal-gold-oil agglomeration were discussed, such as coal chemistry, oil characteristics, and interaction among hydrophobic particles. Moreover, agitation intensity and contact time were also studied for gold recovery kinetics in CGA process. In the case of the same gold ore and other same conditions, the gold recovery kinetics rate coefficient is constant under the different agitation speed. The coal-oil agglomerateswere found having abilities of gold recovery with collector-free, the gold recoverywas up to 77%～86%. The addition of sodium sulfide (160～260 g/t) can activate the surface of gold particles, increase the gold recovery while the floatability of sulfides in gold pulp slightly decreased.