In the beneficiation of low-sulfur quartz-type gold ores, flotation is often used as the main beneficiation method for this type of ore. For this type of gold-bearing minerals, there are usually characteristics such as uneven distribution of particle size, complex symbiotic relationship between gold minerals and other minerals such as pyrite, etc., which makes it difficult to select gold minerals. As a common precious metal, gold minerals pay great attention to the recovery rate. Therefore, when selecting quartz-type gold ores, how to improve the recovery rate of gold minerals has become a widely concerned issue.
When studying this problem, we can start from one angle: adjust the flotation reagent system in view of the more complex embedding and symbiotic relationship of gold minerals in the ore.
Adjust the flotation reagent system
For flotation process, the use of flotation reagents directly affects the recovery of ore. Therefore, in order to improve the recovery rate, adjusting the flotation reagent system is an indispensable aspect. When flotating quartz gold ore, xanthate is often used as a collector. Other reagents such as black medicine can also be used. In actual production, high-grade xanthate can achieve more impressive recovery effects than low-grade xanthate. In many ore dressing plants, it is difficult to collect gold ore by using a single collector. Therefore, combined collectors are more widely used. Commonly used combined collector combinations include butyl xanthate and butyl ammonium black medicine, butyl xanthate and amyl xanthate, etc.
In addition to the adjustment of collectors, the adjustment of activators and depressants can also improve the gold recovery rate. Activators can increase the flotation speed and ore floatability, thereby increasing the gold recovery rate. Activators used in the flotation of quartz-type gold mines include copper sulfate, lead nitrate, lead sulfate, etc., among which copper sulfate has a more obvious effect. The selection of depressants mainly targets arsenopyrite, carbonaceous, bauxite, etc., to eliminate the effects of these minerals on the flotation of gold ores, thereby increasing the recovery rate. Depressants commonly used in this type of gold mine include water glass, lime, etc.
Post time: Nov-25-2024
