钙镁离子对磷矿浮选的界面反应机理探讨

发布时间：2018-03-04 21:25

本文选题：钙镁离子　切入点：胶磷矿　出处：《有色金属(选矿部分)》2017年01期 　论文类型：期刊论文

【摘要】：磷矿资源是磷肥生产的主要原料,磷矿浮选过程中矿浆溶液含有大量的钙镁离子,钙镁离子改变矿物表面性质,导致含钙盐类矿物相互之间浮选分离的难度增加。通过矿物表面微观形貌、矿物表面接触角和捕收剂在矿物表面吸附量等分析方法,得到如下结论:钙镁离子对胶磷矿的浮选影响显著,对白云石的浮选影响微弱,钙镁离子在碱性介质中生成了碳酸盐沉淀或溶胶,粘附于胶磷矿的表面,改变了胶磷矿表面的疏水性,导致了胶磷矿的可浮性下降;但并未粘附与白云石的表面,呈自聚状态存在于矿浆中,对白云石可浮性的影响不大。
[Abstract]:Phosphate rock resource is the main raw material for phosphate fertilizer production. There are a lot of calcium and magnesium ions in the pulp solution of phosphate rock flotation, which changes the surface properties of the mineral. It is difficult to separate calcium salts from each other by means of surface morphology, contact angle of mineral surface and amount of collector adsorbed on mineral surface. The results are as follows: calcium and magnesium ions have a significant effect on flotation of colloid phosphate rock, but have a weak effect on dolomite flotation. Calcium and magnesium ions form carbonate precipitates or sol in alkaline medium and adhere to the surface of colloidal phosphate rock. The hydrophobicity of the colloidal phosphate rock surface was changed, which resulted in the decrease of floatability of the colloidal rock, but it did not adhere to the surface of dolomite, so it existed in the slurry and had little effect on the floatability of dolomite.
【作者单位】：武汉工程大学国家磷资源开发利用工程技术研究中心;
【基金】：湖北省重大科技创新计划项目(2015ACA057)
【分类号】：TD923

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