Flotation separation of brucite and calcite in dodecylamine system enhanced by regulator potassium dihydrogen phosphate

IF 4.7 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Transactions of Nonferrous Metals Society of China Pub Date : 2024-08-01 DOI:10.1016/S1003-6326(24)66567-2

Xiu-feng GONG , Jin YAO , Bin YANG , Wan-zhong YIN , Yu-lian WANG , Ya-feng FU

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引用次数: 0

Abstract

To achieve efficient flotation separation of brucite and calcite, flotation separation experiments were conducted on two minerals using dodecylamine (DDA) as the collector and potassium dihydrogen phosphate (PDP) as the regulator. The action mechanism of DDA and PDP was explored through contact angle measurement, zeta potential detection, solution chemistry calculation, FTIR analysis, and XPS detection. The flotation results showed that when DDA dosage was 35 mg/L and PDP dosage was 40 mg/L, the maximum floating difference between brucite and calcite was 79.81%, and the selectivity separation index was 6.46. The detection analysis showed that the main dissolved component HPO₄²⁻ of PDP is selectively strongly adsorbed on the Ca site on the surface of calcite, promoting the adsorption of the main dissolved component RNH+ 3 of DDA on calcite surface, while brucite is basically not affected by PDP. Therefore, PDP is an effective regulator for the reverse flotation separation of brucite and calcite in DDA system.

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调节剂磷酸二氢钾促进十二胺体系中青金石和方解石的浮选分离

为实现青金石和方解石的高效浮选分离，以十二胺（DDA）为捕收剂，磷酸二氢钾（PDP）为调节剂，对两种矿物进行了浮选分离实验。通过接触角测量、zeta 电位检测、溶液化学计算、傅立叶变换红外光谱分析和 XPS 检测，探索了 DDA 和 PDP 的作用机理。浮选结果表明，当DDA用量为35 mg/L，PDP用量为40 mg/L时，青金石与方解石的最大浮游差为79.81%，选择性分离指数为6.46。检测分析表明，PDP 的主要溶解成分 HPO42- 选择性地强烈吸附在方解石表面的 Ca 位点上，促进了 DDA 的主要溶解成分 RNH+ 3 在方解石表面的吸附，而青金石基本不受 PDP 的影响。因此，PDP 是 DDA 体系中青金石和方解石反浮选分离的有效调节剂。

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来源期刊

Transactions of Nonferrous Metals Society of China 工程技术-冶金工程

CiteScore

7.40

自引率

17.80%

发文量

8456

审稿时长

3.6 months

期刊介绍： The Transactions of Nonferrous Metals Society of China (Trans. Nonferrous Met. Soc. China), founded in 1991 and sponsored by The Nonferrous Metals Society of China, is published monthly now and mainly contains reports of original research which reflect the new progresses in the field of nonferrous metals science and technology, including mineral processing, extraction metallurgy, metallic materials and heat treatments, metal working, physical metallurgy, powder metallurgy, with the emphasis on fundamental science. It is the unique preeminent publication in English for scientists, engineers, under/post-graduates on the field of nonferrous metals industry. This journal is covered by many famous abstract/index systems and databases such as SCI Expanded, Ei Compendex Plus, INSPEC, CA, METADEX, AJ and JICST.