磷矿反浮选回水体系中难免离子对浮选行为的影响

Effect of Inevitable Ions in Phosphate Reverse Flotation Return Water Systems on Flotation Behavior

这是一篇矿业工程领域的论文。氟磷灰石及白云石在反浮选酸性介质中易溶解出Ca^(2+)及Mg^(2+),并在回水循环过程中存在“累积效应”,对浮选指标造成不良影响。本实验以氟磷灰石、白云石及石英三种单矿物为研究对象,研究了不同循环次数的回水对三种单矿物浮选回收率的影响,研究表明,当pH值为5,循环次数达到3次后,白云石与氟磷灰石回收率差值由72.21%降低为64.19%,石英的回收率基本维持10%左右;而循环次数达到5次时,白云石与氟磷灰石回收率差值略微回升为69.74%,石英的回收率略微降至11.22%。本研究通过测定回水循环体系下离子溶出量、矿物表面的Zeta电位以及矿物表面的离子吸附量等分析手段,揭示了不同循环次数的回水中溶解离子对三种单矿物的作用机理。

This is an article in the field of mining engineering.Ca^(2+)and Mg^(2+)are easily dissolved from fluorapatite and dolomite in the acid medium of reverse flotation,and there is a"cumulative effect"in the process of backwater circulation,which has an adverse effect on the flotation indexes.Taking fluorapatite,dolomite and quartz as the research objects,the effect of different recycle times of backwater on the flotation recovery of three single minerals was studied.The results showed that when pH value was 5,the recovery difference between dolomite and fluorapatite decreased from 72.21%to 64.19%,and the recovery of quartz maintained at about 10%;When the number of cycles reached 5,the recovery difference between dolomite and fluorapatite slightly increased to 69.74%,and the recovery of quartz slightly decreased to 11.22%.In this study,the mechanism of dissolved ions in backwater for three kinds of single minerals was revealed by measuring the number of dissolved ions,zeta potential of mineral surface and ions adsorption capacity of mineral surface under backwater circulation system.