Flotation separation performance of malachite from calcite with new chelating collector and its adsorption mechanism

被引：34

作者：

Zhang, Xingrong ^{[1
]}

Lu, Liang ^{[1
]}

Li, Youhui ^{[1
]}

Zhu, Yangge ^{[1
]}

Han, Long ^{[1
]}

Li, Chengbi ^{[1
]}

机构：

[1] BGRIMM Technol Grp, State Key Lab Mineral Proc, Beijing 102600, Peoples R China

来源：

SEPARATION AND PURIFICATION TECHNOLOGY | 2021年 / 255卷

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

Malachite; Calcite; Flotation separation; Chelating collector; Adsorption; OXIDE COPPER MINERALS; MACROMOLECULAR DEPRESSANT; SULFIDIZATION FLOTATION; HYDROPHOBIC MECHANISM; N-OCTANOHYDROXAMATE; BEHAVIOR; SULFIDE; 3-HEXYL-4-AMINO-1,2,4-TRIAZOLE-5-THIONE; DITHIOPHOSPHATE; SURFACTANTS;

D O I：

10.1016/j.seppur.2020.117732

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

In this study, the flotation separation performances of malachite from calcite were investigated using a new chelating collector S-carboxymethyl-O, O'-dibutyl dithiophosphate (CMDTP) by micro-flotation tests, which showed that CMDTP exhibited a stronger collecting power and a better selectivity on malachite than octyl hydroxamic acid (OHI), 8-hydroxyquinoline (HQ) and sodium isobutyl xanthate (SIBX). In the flotation separation of artificially mixed minerals, malachite could be separated successfully from calcite at pH around 9.0 when using Na2S as a regulator. Its adsorption mechanism was also studied by FT-IR, zeta potential and XPS measurements, all of which confirmed that CMDTP showed a better affinity to malachite surface than to calcite surface. Furthermore, XPS provided obvious evidence that CMDTP could easily react with Cu2+ sites on malachite surface, and only a tiny adsorption occurred on calcite surface without Cu2+ ions.

引用

页数：9

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