Selective flotation separation of gypsum and quartz using dodecyl amine hydrochloride as collector: Mechanism and application

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-05-07 DOI:10.1002/sia.7320

Mengyao Qi, Weijun Peng, Wei Wang, Yijun Cao, Guixia Fan, Yukun Huang

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引用次数: 0

Abstract

The selective flotation separation of gypsum and quartz in phosphogypsum (PG) is an urgent problem that is very important for the high‐value utilization of PG. In the work, dodecyl amine hydrochloride (DH) was introduced as a collector for the selective flotation separation of gypsum and quartz. The flotation property and selective mechanism of DH on the surface of gypsum and quartz were researched by single mineral flotation experiments, Fourier transform attenuated total reflection infrared spectroscopy analyzer, zeta potential analyzer, X‐ray photoelectron spectrum, molecular dynamic (MD) simulation, etc. Additionally, H+ was introduced into the mineral‐water system simulated by MD to take into account the effect of acidic conditions on the adsorption of DH. The pre‐adsorption of H+ on the quartz surface under strongly acidic conditions hindered the electrostatic force adsorption of DH on the quartz surface. Furthermore, DH was adopted as a collector in the direct flotation recovery of gypsum from PG, and the gypsum concentrates with productivity of 69.85%, CaSO4·2H2O content of 96.33%, and whiteness of 55.00% were obtained. The SiO2 content in the gypsum concentrate decreased from 9.08% to 0.616%. It suggested that DH could serve as a promising collector in the selective separation of gypsum and quartz in PG via flotation.

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使用十二烷基胺盐酸盐作为捕收剂对石膏和石英进行选择性浮选分离：机理与应用

磷石膏（PG）中石膏和石英的选择性浮选分离是一个亟待解决的问题，对于磷石膏的高值化利用非常重要。该研究引入十二烷基胺盐酸盐（DH）作为捕收剂，用于石膏和石英的选择性浮选分离。通过单矿物浮选实验、傅立叶变换衰减全反射红外光谱分析仪、ZETA电位分析仪、X射线光电子能谱、分子动力学（MD）模拟等手段研究了DH在石膏和石英表面的浮选特性和选择性机理。此外，为了考虑酸性条件对 DH 吸附的影响，还在 MD 模拟的矿物-水系统中引入了 H+。在强酸性条件下，H+在石英表面的预吸附阻碍了 DH 在石英表面的静电力吸附。此外，采用 DH 作为捕收剂从 PG 中直接浮选回收石膏，获得了生产率为 69.85%、CaSO4-2H2O 含量为 96.33%、白度为 55.00%的石膏浓缩物。石膏浓缩物中的 SiO2 含量从 9.08% 降至 0.616%。这表明，在通过浮选选择性分离 PG 中的石膏和石英时，DH 可以作为一种很有前途的捕收剂。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.