田孟杰

Selective flotation separation of cassiterite and calcite through using cinnamohydroxamic acid as the collector and Pb2+ as the activator

发布时间：2023-03-29

点击次数：

影响因子：5.518

DOI码：10.1016/j.colsurfa.2023.131262

所属单位：中南大学

发表刊物：Colloids and Surfaces A: Physicochemical and Engineering Aspects

关键字：Cassiterite; Calcite; Flotation; Cinnamohydroxamic acid; Pb2+; Activation.

摘要：This study employs cinnamohydroxamic acid (CHA) as the collector in the flotation separation of cassiterite/calcite. Pb2+ ion is used as the activator to improve the collecting ability of CHA. This reagent system consisting of CHA collector and Pb2+ activator can achieve a higher recovery of cassiterite of ∼90% than that of calcite of ∼30%. A greater increase of 27.74% in C atomic concentration on the Pb2+-treated cassiterite surface than that of 15.21% on the Pb2+-treated calcite surface after the treatment with CHA indicates a higher adsorption amount of CHA on the Pb2+-treated cassiterite surface than that on the Pb2+-treated calcite surface, which results in its stronger ability to collect the Pb2+-activated cassiterite particles compared to the Pb2+-activated calcite particles. The treatment with CHA results in a smaller shift of ∼20 mV in the zeta potential of the Pb2+-treated cassiterite particles than that of ∼45 mV in the zeta potential of the Pb2+-treated calcite particles, which is in contradiction with the results of the X-ray photoelectron spectroscopic tests. A novel activation mechanism of Pb2+ ion for CHA flotation of cassiterite is proposed to account for this paradoxical observation. The formation of the Pb-CHA complexes is this activation mechanism of Pb2+ ion.

论文类型：期刊论文

通讯作者：田孟杰

学科门类：工学

一级学科：矿业工程

文献类型：J

卷号：666

是否译文：是

发表时间：2023-03-11

收录刊物：SCI

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