EPE型双亲嵌段共聚物强化油酸钠浮选分离萤石与微细粒石英
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摘要
通过对萤石和微细粒石英进行纯矿物浮选试验、人工混合矿浮选试验、Zeta电位分析、红外光谱分析及油酸钠吸附量测定,系统地研究了在油酸钠浮选体系中EPE型双亲嵌段共聚物F-127对微细粒石英和萤石的人工混合矿浮选速率的影响。结果表明:油酸钠对萤石具有良很好的捕收效果,对石英无捕收效果;F-127具有一定的起泡功能,因而能显著加快萤石纯矿物的上浮;微细粒石英易与粗粒萤石发生异相凝聚,F-127通过改善矿浆的分散程度,可促进微细粒石英从粗粒萤石表面解吸下来,从而改善萤石与石英的浮选分离效果。
The effect of nonionic-like amphiphilic triblock copolymers F-127 on the fine quartz and fluorite flotation rate in sodium oleate flotation system was systematically investigated by the single fluorite and quartz and mixture flotation test, Zeta potential analysis, infrared spectrum analysis and sodium oleate absorption test. The results indicated that the sodium oleate has good collecting effect on fluorite and no collecting effect on quartz; F-127 has certain foaming function,therefore, the floatation of pure fluorite minerals can be greatly accelerated;A hetero-coagulation is generated in fine quartz and coarse fluorite,F-127 can improve the dispersion of fluorite-quartz ore and it can promote desorption of fine quartz from the surface of coarse fluorite. Thus, the flotation separation of fluorite and fine quartz can be improved.
The effect of nonionic-like amphiphilic triblock copolymers F-127 on the fine quartz and fluorite flotation rate in sodium oleate flotation system was systematically investigated by the single fluorite and quartz and mixture flotation test, Zeta potential analysis, infrared spectrum analysis and sodium oleate absorption test. The results indicated that the sodium oleate has good collecting effect on fluorite and no collecting effect on quartz; F-127 has certain foaming function,therefore, the floatation of pure fluorite minerals can be greatly accelerated;A hetero-coagulation is generated in fine quartz and coarse fluorite,F-127 can improve the dispersion of fluorite-quartz ore and it can promote desorption of fine quartz from the surface of coarse fluorite. Thus, the flotation separation of fluorite and fine quartz can be improved.
引文
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[4]邱仙辉,马强,袁勤智,等.不同抑制剂对萤石与方解石浮选分离影响[J].非金属矿,2017(6):60-62.Qiu Xianhui,Ma Qiang,Yuan Qinzhi,et al.Effect of different depressants on fluorite and calcite flotation separation[J].Non-Metallic Mines,2017(6):60-62.
[5]Song S,LopezValdivieso A,MartinezMartinez C,et al.Improving fluorite flotation from ores by dispersion processing[J].Minerals Engineering,2006(9):912-917.
[6]李洪帅.多金属共生萤石矿浮选分离试验及机理探讨[D].昆明:昆明理工大学,2011.Li Hongshuai.Flotation Separation Test and Mechanism of Polymetallic Interrowth Fluorite Ores[D].Kunming:Kunming University of Technology,2011.
[7]喻福涛.武陵山区萤石、重晶石和方解石浮选行为研究[D].武汉:武汉理工大学,2015.Yu Futao.Study on Flotation Behavior of Fluorite,Barite and Calcite in Wuling Mountain District[D].Wuhan:Wuhan University of Technology,2015.
[8]Zhang J P,Cheng S Z,Li X F,et al.pH-and temperature-induced micellization of the dual hydrophilic block copolymer poly(methacrylate acid)-b-poly(N-(2-methacryloylxyethyl)pyrrolidone)in aqueous solution[J].Acta Physico-Chimica Sinica,2016(8):2018-2026.
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[10]Xin X,Xu G,Wang Y,et al.Interaction between star-like block copolymer and sodium oleate in aqueous solutions[J].European Polymer Journal,2008(10):3246-3255.