Ca<sup>2+</sup>–硅酸钠对长石和石英选择性分离的协同强化机理

蔺博; 匡敬忠; 杨易强; 黄哲誉; 杨德龙; 于明明

doi:10.1007/s12613-023-2790-7

Volume 31 Issue 9

Sep. 2024

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文章导航 > 矿物冶金与材料学报（英文） > 2024 > 31(9): 1985-1995

Bo Lin, Jingzhong Kuang, Yiqiang Yang, Zheyu Huang, Delong Yang, and Mingming Yu, Synergistic strengthening mechanism of Ca²⁺–sodium silicate to selective separation of feldspar and quartz, Int. J. Miner. Metall. Mater., 31(2024), No. 9, pp. 1985-1995. https://doi.org/10.1007/s12613-023-2790-7

Cite this article as:

Bo Lin, Jingzhong Kuang, Yiqiang Yang, Zheyu Huang, Delong Yang, and Mingming Yu, Synergistic strengthening mechanism of Ca2+–sodium silicate to selective separation of feldspar and quartz, Int. J. Miner. Metall. Mater., 31(2024), No. 9, pp. 1985-1995. https://doi.org/10.1007/s12613-023-2790-7

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研究论文

Ca²⁺–硅酸钠对长石和石英选择性分离的协同强化机理

1)
江西理工大学资源与环境工程学院, 赣州341000, 中国
2)
江西省矿业工程重点实验室, 赣州341000, 中国

通讯作者:
匡敬忠 E-mail: kjz692@163.com

文章亮点

（1）发现了一种长石和石英分离的新型组合抑制剂。

（2）系统研究了Ca²⁺–硅酸钠对长石和石英协同强化选择抑制机理。

（3）提出了一种中性条件下长石与石英浮选分离方案。

中文摘要

抑制剂对石英与长石浮选分离具有重要意义。本文采用Ca²⁺–硅酸钠新型组合抑制剂对石英和长石浮选分离进行了研究，通过微浮选实验评价了组合抑制剂的浮选效果，分析了抑制剂作用前后长石与石英表面性质差异，探讨了其协同强化抑制机理。结果表明，Ca²⁺–硅酸钠对长石与石英浮选分离最佳配比：Ca²⁺：硅酸钠为1:5。傅里叶变换红外(FT-IR)和吸附量分析表明，组合抑制剂优先吸附在长石表面，阻止了捕收剂与长石的作用。X射线光电子能谱(XPS)显示，Ca²⁺直接与石英表面相互作用，强化了其对捕收剂的吸附；组合抑制剂中的Ca²⁺取代了长石表面的K⁺，改变了Al活性位点表面性质，导致长石表面形成了亲水膜，阻止了捕收剂在长石表面吸附，Ca²⁺–硅酸钠协同强化了长石和石英高效浮选分离。

关键词:

Research Article

Synergistic strengthening mechanism of Ca²⁺–sodium silicate to selective separation of feldspar and quartz

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Abstract

Abstract

Inhibitors are important for flotation separation of quartz and feldspar. In this study, a novel combined inhibitor was used to separate quartz and feldspar in near-neutral pulp. Selective inhibition of the combined inhibitor was assessed by micro-flotation experiments. And a series of detection methods were used to detect differences in the surface properties of feldspars and quartz after flotation reagents and put forward the synergistic strengthening mechanism. The outcomes were pointed out that pre-mixing combined inhibitors were more effective than the addition of Ca²⁺ and SS in sequence under the optimal proportion of 1:5. A concentrate from artificial mixed minerals that was characterized by a high quartz grade and a high recovery was acquired, and was found to be 90.70wt% and 83.70%, respectively. It was demonstrated that the combined inhibitor selectively prevented the action of the collector and feldspar from Fourier-transform infrared (FT-IR) and adsorption capacity tests. The results of X-ray photoelectron spectroscopy (XPS) indicated that Ca²⁺ directly interacts with the surface of quartz to increase the adsorption of collectors. In contrast, the chemistry property of Al on the feldspar surface was altered by combined inhibitor due to Na⁺ and Ca²⁺ taking the place of K⁺, resulting in the composite inhibitor forms a hydrophilic structure, which prevents the adsorption of the collector on the surface of feldspar by interacting with the Al active site. The combination of Ca²⁺ and SS synergically strengthens the difference of collecting property between quartz and feldspar by collector, thus achieving the effect of efficient separation. A new strategy for flotation to separate quartz from feldspar in near-neutral pulp was provided.
- feldspar;
- quartz;
- Ca²⁺–sodium silicate;
- selective adsorption;
- flotation separation

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Ca²⁺–硅酸钠对长石和石英选择性分离的协同强化机理

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Synergistic strengthening mechanism of Ca²⁺–sodium silicate to selective separation of feldspar and quartz

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Ca2+–硅酸钠对长石和石英选择性分离的协同强化机理

文章亮点

中文摘要

Synergistic strengthening mechanism of Ca2+–sodium silicate to selective separation of feldspar and quartz

Abstract

References

数据统计

Catalog

Ca²⁺–硅酸钠对长石和石英选择性分离的协同强化机理

Synergistic strengthening mechanism of Ca²⁺–sodium silicate to selective separation of feldspar and quartz