Activation mechanisms of sodium silicate-inhibited fluorite in flotation under neutral and slightly alkaline conditions

被引：12

作者：

Jin, Saizhen ^{[1
]}

Ou, Leming ^{[1
]}

Ma, Xiqi ^{[1
]}

Zhou, Hao ^{[1
]}

Zhang, Zhengjun ^{[1
]}

机构：

[1] Cent South Univ, Sch Minerals Proc & Bioengn, Changsha 410083, Peoples R China

来源：

MINERALS ENGINEERING | 2021年 / 161卷

基金：

中国国家自然科学基金;

关键词：

Fluorite flotation; Sodium silicate; Activate; Solution pH; Dominant species; ACIDIFIED WATER GLASS; SELECTIVE FLOTATION; SEPARATION; SCHEELITE; CALCITE; ADSORPTION; ACID; BENEFICIATION; DEPRESSANTS; COLLECTOR;

D O I：

10.1016/j.mineng.2020.106738

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

In this study, the activation mechanisms of fluorite inhibited using Na2SiO3 by adjusting the solution pH to neutral and slightly alkaline conditions were investigated. The solution chemistry of sodium silicate and microflotation tests showed that SiO(OH)(3)(-) in the Na2SiO3 solution strongly inhibited fluorite flotation, while H4SiO4 and SiO2(am) showed only weak inhibition. By adjusting the solution pH of Na2SiO3- inhibited fluorite flotation to 7-7.5, fluorite flotation was activated. In this pH range, the dominant Na2SiO3 species were H4SiO4 and SiO2(am), and the measured contact angles indicated that the fluorite surface became more hydrophobic. The adsorption tests also indicated that fewer Na2SiO3 species adsorbed on the fluorite surface at pH 7 than 12.3, while in the presence of Na2SiO3, more oleate adsorbed on the fluorite surface under neutral and slightly alkaline conditions.

引用

页数：6

共 13 条

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