铅锌选矿废水对硫化铅浮选的影响研究

Study on the Influence of Lead-Zinc Mineral Processing Wastewater on Lead Sulfide Flotation

针对铅锌选矿废水对硫化铅浮选的不利影响,分析废水的主要成分及影响硫化铅矿浮选的主要原因,揭示选矿废水影响硫化铅矿浮选的机理。铅锌选矿废水具有金属离子种类多、固体悬浮物含量高、COD高、pH高的特点。考察了pH、各种离子含量对硫化铅矿可浮性的影响。结果表明,钙离子对硫化铅矿浮选的影响较大;选矿废水中钙离子浓度高主要是因铅锌矿浮选工艺使用大量石灰作抑制剂所致;钙离子改变硫化铅矿物可浮性的主要原因是影响捕收剂在矿物表面的吸附。

For the problem that lead-zinc mineral processing wastewater has an adverse effect on lead sulfide flotation,the main components of the wastewater and the main reasons affecting the lead sulfide flotation were analyzed,and the mechanism of the mineral processing wastewater affecting lead sulfide flotation was revealed.The lead-zinc mineral processing wastewater has the characteristics of variety of metal ions,high content of suspended solids,high COD,and high pH.The effects of pH and various ion contents on the floatability of lead sulfide were investigated.The results show that calcium ions have a greater effect on lead sulfide.The high concentration of calcium ions in the mineral processing wastewater is mainly due to large quantities of lime used as an inhibitor in lead-zinc ore flotation process.The main reason why calcium ions change the floatability of lead sulfide minerals is that the calcium ions affect the adsorption of collectors on the mineral surface.