Application of Sodium Aminophosphate in the High-efficiency Separation of Carlin-type Gold Deposits
Efficient separation of Carlin-type gold deposits is a challenge for the utilization of gold ores.The majority of gold in Carlin-type gold ores occurs as invisible gold within pyrite,resulting in the poor crystallization of pyrite.The previous investigation has shown that oxidation caused the homogenization effect,thereby resulting in adhesion,thus,deteriorating the separation results of Carlin-type gold deposits.Based on the understanding of interactions mechanism between pyrite and dolomite,a technical prototype of"strengthening dispersion"to optimize the separation index of Carlin-type gold deposits was preliminarily proposed and highly selective reagents sodium amino phosphate was selected to realize the application of the technical prototype,good separation indicators have been obtained in the laboratory.In this paper,the turbidity test was used to verify the effects of selected reagents on strengthening dispersion,meanwhile,the artificial mixed ore and the real ores of high-and low-grade Carlin-type gold deposit were used to demonstrate the effect of reagent on mineral separation.The results showed that:sodium aminophosphate can achieve the expected goal of increasing the Fe and Au recovery in the concentrate,and decreasing the MgO floating ratio,while,increasing the Au enrichment ratio to about 3.5.The above results show that sodium amino phosphate can improve the separation efficiency between pyrite and dolomite by strengthening the dispersion of oxidized pyrite and dolomite particles,so as to optimize the flotation index of Carlin-type gold mine.The prototype technology provides a reference for the development of efficient separation between pyrite and dolomite minerals,and has the potential for popularization and application.
NETL
NSTL
万方数据
