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酸化水玻璃对萤石与方解石浮选分离作用研究
引用本文:张国范,邓红,魏克帅,石晴.酸化水玻璃对萤石与方解石浮选分离作用研究[J].有色金属(选矿部分),2014(1):80-82.
作者姓名:张国范  邓红  魏克帅  石晴
作者单位:中南大学 资源加工与生物工程学院,中南大学 资源加工与生物工程学院,中国地质矿业总公司,中南大学 资源加工与生物工程学院
基金项目:国家自然科学基金资助项目(51174229),湖南省研究生科研创新项目(CX2011B121)
摘    要:研究了不同pH的酸化水玻璃对萤石与方解石可浮性的影响规律。研究结果表明,酸化水玻璃的pH对药剂的抑制效果有重要影响,pH介于5.0~9.5的酸化水玻璃能有效抑制方解石,随着用量的增加抑制效果越强,在弱碱性的浮选区间内能很好地选择性抑制方解石,而强碱性和强酸性的酸化水玻璃对两种矿物的选择性抑制效果差。其作用机理可能为水玻璃与硫酸混合后,在弱碱性和弱酸性的溶液pH区间内更容易生成亲水性强的硅酸胶粒,可以选择性吸附在方解石表面上,实现萤石与方解石的浮选分离。

关 键 词:萤石  方解石  酸化水玻璃  浮选
收稿时间:4/1/2013 12:00:00 AM
修稿时间:2013/11/27 0:00:00

The effect of acidized sodium silicate on flotation separation of fluorite and calcite
Authors:ZHANG Guo-fan  DENG Hong  WEI Ke-shuai and SHI Qing
Affiliation:School of Minerals Processing and Bioengineering,Central South University,Changsha Hunan,School of Minerals Processing and Bioengineering,Central South University,Changsha Hunan,China National geological,School of Minerals Processing and Bioengineering,Central South University,Changsha Hunan
Abstract:The effect of acidized sodium silicate with different pH values on floatability of fluorite and calcite has been studied. The results show that the pH value of acidized sodium silicate has an great impact on its function. The acidized sodium silicate with pH value between 5 and 9.5 can inhibit calcite effectively in weakly alkaline flotation solution, and the calcite flotation recovery decreases with increasing reagent dosage. Acidized sodium silicate with strong alkalinity and acidity does not have selective depression action to calcite and fluorite. Its mechanism may be that when they are mixed in weakly alkaline and acid solution, sodium silicate and sulfuric acid can generate hydrophilic silicate colloidal particles, which could selectively adsorbed on calcite surfaces to separate fluorite and calcite.
Keywords:fluorite  calcite  acidized sodium silicate  flotation
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