钙镁离子对云南磷矿浮选的影响及回水处理

以云南晋宁、安宁和昆阳磷矿为研究对象,在浮选过程中添加钙镁离子,通过回收率、品位的变化研究其对浮选效果的影响.试验结果表明,当加入的钙镁离子达到一定浓度后,对晋宁和安宁磷矿正浮选有不同程度的影响,而对昆阳磷矿单一反浮选影响不大.同时,晋宁和安宁磷矿正浮选尾矿水钙镁离子的测定结果表明,正浮选尾矿水中的钙镁离子浓度为45 mg/L时不足以影响正浮选过程,正浮选尾矿水可直接返回正浮选；当正反浮选废水混合回用,钙镁离子离子浓度超过100 mg/L时,需处理去除.

Effect of calcium and magnesium ions on Yunnan phosphate flotation and backwater treatment process

To research the influence of high concentration of mineral calcium and magnesium ions on Yunnan phosphate ore flotability,a large amount of ore dressing wastewater ions and components was added in Jinning,Anning and Kunyang phosphate flotation process in Yunnan.The effect of flotation was studied based on the changes of phosphorus recovery and phosphate grade.The results reveal that the increase of concentration of calcium and magnesium ions impacts Jinning and Anning phosphate direct-flotation,but do not impact Kunyang phosphate reverse-flotation.The concentration of calcium and magnesium ions in flotation tailing-water of Jinning and Anning was determined.The results show that when the concentration of calcium and magnesium ions is 45mg/L in direct-flotation tailings water,direct-flotation is not impacted,positive-flotation tailings water can be directly return to positive-flotation process;only when the concentration of calcium and magnesium ions is over 100 mg/L,direct-flotation water mixed with reverse-flotation water must be disposed.