摘要
磷矿浮选矿浆中存在大量难免离子,回水循环利用时,这些离子的累积往往严重影响浮选指标。研究了Ca2+、Mg2+离子对胶磷矿浮选影响,分析了胶磷矿、油酸钠及Ca2+、Mg2+离子在矿浆中各组分的浮选溶液化学行为,结果表明,随着Ca2+、Mg2+离子浓度的增加,胶磷矿的浮选回收率下降;Ca2+离子不仅消耗油酸根离子,而且抑制矿物表面油酸钙的生成;Mg2+在低浓度时生成Mg3(PO4)2沉淀,增加胶磷矿表面活性点,有利于浮选;但Mg2+浓度增加时,也会消耗油酸根离子,甚至在胶磷矿表面形成Mg(OH)2沉淀,影响胶磷矿浮选。
In cellophane flotation there are many unavoidable ions in the pulp,which will exacerbate the flotation index when the water recycles.The effects of calcium and magnesium ions in cellophane flotation were studied and the solution chemistry action of phosphate,sodium oleate,and calcium and magnesium ions in the pulp were analyzed.The results show that the cellophane recovery declines with the increase of calcium ions or magnesium ions.Calcium ions not only cost oleate ions,but also restrain forming of calcium oleate on mineral surface.When the content of the magnesium ions is low,Mg3（PO4）2 is generated on the cellophane surface,then the activity of particle increases and it will be beneficial to the flotation.As the content of magnesium ions increases,Mg（OH）2 is generated on the surface,which will restrain the flotation of cellophane.
出处
《矿产保护与利用》
2013年第4期41-45,共5页
Conservation and Utilization of Mineral Resources
基金
湖北省自然科学基金创新群体项目(2010CDA07)
关键词
钙镁难免离子
胶磷矿
浮选溶液化学
calcium and magnesium ions
cellophane
solution chemistry
