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Flotation Separation of Chalcopyrite from Talc Using a New Depressant Carrageenan
Colloids and Surfaces A: Physicochemical and Engineering Aspects ( IF 5.2 ) Pub Date : 2020-10-01 , DOI: 10.1016/j.colsurfa.2020.125274
Hao Zhou , Zhengjun Zhang , Leming Ou , Qiongyin Mai

Abstract As a typical gangue mineral in many sulfide deposits, naturally hydrophobic talc needs to be depressed by adding depressants to achieve a good flotation separation. Conventional talc depressants lack selectivity, resulting in the depression of both talc and sulfide minerals. In this study, carrageenan was applied as a selective depressant for talc. The mechanism of carrageenan in the flotation separation of chalcopyrite from talc when using collector sodium butyl xanthate (SBX) was investigated. Micro-flotation results showed that carrageenan can efficiently and selectively depress talc and barely influenced the flotation of chalcopyrite. The artificial mixed minerals flotation results further confirmed that carrageenan was a selective depressant for talc. A concentrate with Cu grade of 32.42 % was obtained at 91.86 % recovery from their artificial mixtures of minerals. The flotation results indicated that carrageenan exhibited stronger depressing ability than the conventional talc depressants of CMC and guar gum, suggesting it could become a promising potential depressant in the selective flotation separation of chalcopyrite from talc. Adsorption mechanism of carrageenan on the surface of talc was investigated using zeta potential measurements, adsorption measurements, FTIR measurements, XPS measurements and Langmuir adsorption model. The zeta potential measurements and adsorption measurements indicated that carrageenan selectively adsorbed on talc surface and therefore changed the zeta potentials. The FTIR results and XPS tests illustrated that the adsorption of carrageenan on talc occurred through physical interactions rather than chemical complexation. Langmuir adsorption modeling confirmed the major role of hydrophobic interaction.

中文翻译:

一种新型抑制剂卡拉胶浮选滑石粉中的黄铜矿

摘要 作为许多硫化矿床中典型的脉石矿物,天然疏水性滑石需要通过添加抑制剂来抑制,才能达到良好的浮选分离效果。传统的滑石抑制剂缺乏选择性,导致滑石和硫化物矿物的抑制。在这项研究中,角叉菜胶被用作滑石粉的选择性抑制剂。研究了卡拉胶浮选分离黄铜矿和滑石粉中使用捕收剂丁基黄原酸钠(SBX)时的作用机理。微浮选结果表明,卡拉胶能高效、选择性地抑制滑石粉,对黄铜矿的浮选影响不大。人工混合矿物浮选结果进一步证实了卡拉胶是滑石粉的选择性抑制剂。在 91 时获得了铜品位为 32.42% 的精矿。从他们的人造矿物混合物中回收 86%。浮选结果表明,角叉菜胶比传统的CMC和瓜尔胶等滑石抑制剂表现出更强的抑制能力,表明其在黄铜矿与滑石的选择性浮选分离中可能成为一种很有潜力的抑制剂。使用zeta电位测量、吸附测量、FTIR测量、XPS测量和Langmuir吸附模型研究了卡拉胶在滑石表面的吸附机制。zeta 电位测量和吸附测量表明角叉菜胶选择性吸附在滑石表面,因此改变了 zeta 电位。FTIR 结果和 XPS 测试表明角叉菜胶对滑石粉的吸附是通过物理相互作用而不是化学络合发生的。
更新日期:2020-10-01
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