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金属矿山 ›› 2016, Vol. 45 ›› Issue (02): 66-70.

• 矿物工程 • 上一篇    下一篇

白钨矿常温浮选基础研究

王建军1,高志勇1,孙伟1,刘红尾2   

  1. 1.中南大学资源加工与生物工程学院,湖南 长沙 410083;2.南京银茂铅锌矿业有限公司,江苏 南京 210033
  • 出版日期:2016-02-15 发布日期:2016-03-11
  • 基金资助:

    * 国家自然科学青年基金项目(编号:51404300),中国博士后科学基金项目(编号:2015M570689),湖南省自然科学青年基金项目(编号:2015JJ3141)。

Basic Research of Scheelite Flotation at Normal Temperature

Wang Jianjun1,Gao Zhiyong1,Sun Wei1,Liu Hongwei2   

  1. 1.School of Minerals Processing and Bioengineering,Central South University,Changsha 410083,China;2.Nanjing Yinmao Lead-zinc Mining Co.Ltd.,Nanjing 210033,China
  • Online:2016-02-15 Published:2016-03-11

摘要: 以白钨矿、萤石和方解石单矿物为研究对象,通过单矿物可浮性试验、动电位测定、吸附量测定以及溶液化学分析,对白钨矿的常温浮选行为及机理进行了系统研究。浮选试验结果表明,用CaO+Na2CO3(以1∶3的质量比添加)调节矿浆pH=11.0、硅酸钠为抑制剂、733氧化石蜡皂为捕收剂,可以实现常温下白钨矿与萤石和方解石的有效分离。用CaO+Na2CO3调浆后,萤石和方解石表面的Ca2+浓度大于白钨矿表面的Ca2+浓度,加入硅酸钠后,萤石、方解石表面动电位显著负移,而白钨矿表面电位变化不明显。吸附量测定及溶液化学计算表明:硅酸钠在3种矿物表面的吸附量由大到小为萤石>方解石>白钨矿,即3种矿物表面生成硅酸钙的难易程度由强到弱依次为萤石>方解石>白钨矿。

关键词: 白钨矿, 常温浮选, 动电位, 吸附量

Abstract: The mechanism of scheelite flotation from calcite and fluorite at normal temperature was studied by the single mineral flotability test,zeta potential measurement,adsorption measurement and solution chemistry calculation.Scheelite can be selectively separated from calcite and fluorite at normal temperature using sodium silicate as depressant and 733 oxidized paraffin soap as collector at pH=11.0 using CaO+Na2CO3 as pH regulator(at mass ratio of 1∶3).Using CaO+Na2CO3 as pH regulator,Ca2+ concentration on the surfaces of fluorite and calcite was greater than that on scheelite surface.And then the addition of sodium silicate produced a greater decrease of zeta potential of fluorite and calcite than scheelite.Adsorption measurement results showed that sodium silicate had a adsorption capacity in the order:fluorite> calcite> scheelite.Solution chemistry calculation showed that calcium silicate formed on the surfaces of minerals in the order:fluorite> calcite> scheelite.

Key words: Scheelite, Flotation at normal temperature, Zeta potential, Adsorption