不同海拔高度对硫化铅锌矿浮选行为及作用机制研究

发布时间：2019-03-11 15:59

【摘要】：通过单矿物浮选试验,研究了不同海拔高度对方铅矿和闪锌矿浮选行为的影响。测定了不同海拔条件下方铅矿和闪锌矿两种矿物矿浆溶氧量的大小,讨论了两种矿物电化学行为差异,分析了海拔高度对两种矿物浮选分离影响的作用机制。结果表明,铅锌分离的最佳条件为p H在11左右,Eh130 m V。海拔升高,两种矿物矿浆溶氧量降低、矿浆电位降低,有利于方铅矿和闪锌矿的浮选分离。高海拔条件下矿浆溶氧量低,导致矿浆电位低,较低的矿浆溶氧量和电位对方铅矿与乙硫氮反应生成金属捕收剂盐的影响很小,不会对方铅矿的浮选产生影响,但在此条件下闪锌矿表面乙硫氮很难生成,对闪锌矿的浮选很不利,并且高p H值能使闪锌矿表面氧化生成亲水物质而受到抑制,这是高海拔条件下有利于硫化铅锌矿浮选分离的主要原因。
[Abstract]:The effects of different altitude on the flotation behavior of lead ore and sphalerite were studied by single mineral flotation test. The dissolved oxygen amounts of galena and sphalerite mineral pulp were measured at different altitude, the difference of electrochemical behavior between the two minerals was discussed, and the mechanism of the influence of altitude on flotation separation of two minerals was analyzed. The results show that the optimum conditions for the separation of lead and zinc are as follows: ph is about 11, and Eh130 m V. With the increase of altitude, the dissolved oxygen and the pulp potential of the two mineral pulp decrease, which is beneficial to the flotation separation of galena and sphalerite. The low dissolved oxygen content of pulp at high altitude results in low pulp potential, and the lower pulp dissolved oxygen and potential have little effect on the reaction of lead ore with ethylthio-nitrogen to form metal collector salt, which will not affect the flotation of lead ore. However, under these conditions, it is very difficult to form ethylthio-nitrogen on the surface of sphalerite, which is disadvantageous to the flotation of sphalerite, and high pH value can inhibit the formation of hydrophilic substance on the surface of sphalerite. This is the main reason for flotation separation of lead-zinc sulphide ore at high altitude.
【作者单位】：北京有色金属研究总院生物冶金国家工程实验室;西南科技大学材料科学与工程学院;青海开门矿业开发有限公司;
【基金】：国家国防科工局核能开发专项课题(13zg6103) 国家科技部科技支撑计划资助项目(2012BAB08B01) 青海省科技计划资助项目(2014-GX-Q04)资助
【分类号】：TD923;TD952

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