新型有机抑制剂对萤石和方解石浮选分离的影响及作用机理  

Effect and Mechanism of Novel Organic Inhibitors on Flotation Separation of Fluorite and Calcite

作　　者：周贺鹏 吴寒丹[1,2] 龚磊 唐学昆 罗仙平 ZHOU Hepeng;WU Handan;GONG Lei;TANG Xuekun;LUO Xianping(Key Laboratory on Environmental Pollution Control in Mining and Metallurgy in Jiangxi Province,Ganzhou 341000,China;School of Resource and Environmental Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China)

机构地区：[1]江西省矿冶环境污染控制重点实验室,江西赣州341000 [2]江西理工大学资源与环境工程学院,江西赣州341000

出　　处：《金属矿山》2023年第5期122-128,共7页Metal Mine

基　　金：江西省博士后科研择优资助项目(编号:2021KY08);江西省青年井冈学者奖励计划项目(编号:QNJG2020048);江西理工大学清江青年英才支持计划项目(编号:JXUSTQJBJ2020002)。

摘　　要：萤石与方解石具有类似的表面性质,即相同的活性钙质点,导致2种矿物在浮选过程中的分离十分困难。首次提出采用环保型水溶性膦酸盐乙二胺四亚甲基膦酸钠(EDTMPS)作抑制剂强化萤石与方解石的浮选分离,并开展了相关的浮选试验。研究结果表明,在矿浆pH值为7~9的条件下,EDTMPS可有效抑制方解石的上浮,而对萤石的浮选行为影响较小,人工混合矿浮选试验验证了采用EDTMPS作为抑制剂可实现方解石与萤石的分离。对EDTMPS抑制剂实现方解石与萤石分离的机理进行了研究分析,发现EDTMPS分子结构中的膦酸根离子与方解石表面的钙离子发生化学吸附,阻碍了油酸根离子的进一步吸附,相比较而言,EDTMPS在萤石表面的吸附极小,对其可浮性的影响很小。EDTMPS抑制剂可选择性抑制方解石,在方解石与萤石的浮选分离中具有广泛的应用前景。Fluorite and calcite have similar surface properties,that is,the same active calcium particles,which makes it very difficult to separate the two minerals in the flotation process.In this paper,the environmental protection water-soluble phosphonate sodium ethylenediamine tetramethylene phosphonate(EDTMPS)was proposed for the first time to strengthen the flotation separation of fluorite and calcite,and related flotation tests were carried out.The results show that EDTMPS can effectively inhibit the flotation of calcite,but has little effect on the flotation behavior of fluorite when the pH value of pulp is 7~9.The flotation test of artificial mixed ore proves that the separation of calcite and fluorite can be realized by using EDTMPS as an inhibitor.The mechanism of separation of calcite from fluorite by EDTMPS inhibitor was studied and analyzed.It was found that phosphonate ions in EDTMPS molecular structure chemically adsorbed with calcium ions on calcite surface,which hindered the further adsorption of oleate ions.Comparatively speaking,EDTMPS had little adsorption on fluorite surface and little floatability.Generally speaking,EDTMPS inhibitors can selectively inhibit calcite,which has a wide application prospect in the flotation separation of calcite and fluorite.

关 键 词：萤石 方解石 乙二胺四甲膦酸钠 膦酸根离子 化学吸附 

分 类 号：TD923[矿业工程—选矿] TD97