Effects of the preassembly of benzohydroxamic acid with Fe (III) ions on its adsorption on cassiterite surface
发布时间：2022-05-01
点击次数：
影响因子：4.765
DOI码：10.1016/j.mineng.2018.07.019
发表刊物：Minerals Engineering
关键字：Cassiterite; Flotation; Ferric chloride (FC); Benzohydroxamic acid (BHA); Fe-BHA complexes
摘要：Metal ions are widely used as activators in the flotation of oxidised minerals. At the same dosage of collector, the recovery of target minerals (cassiterite, scheelite, wolframite and ilmenite) can be evidently improved with the addition of metal ion activator. Adsorption of metal ions and their hydroxides can provide attractive sites for collector attachment, contrary to bare minerals that exhibit considerably low affinity towards the collector. Iron complexes of benzohydroxamic acid (BHA) are formed during the reaction of ferric chloride with BHA in the solution. These complexes also exhibit strong collecting ability towards cassiterite in the flotation, which contradicted the classical theory that the activator must be added before the collector. However, the major active component and the underlying adsorption mechanism of the Fe-BHA complexes are still unknown. In this study, the solution chemistry calculation has been used to identify the major active components of the Fe-BHA complexes. Accordingly, a preferred adsorption model of the Fe-BHA complexes onto the cassiterite surface has been proposed and proven effective, through first-principles calculations based on density functional theory, flotation experiments and adsorption tests. Our results might shed new light on the activation mechanism of metal ions in mineral flotation.
第一作者：田孟杰
论文类型：期刊论文
学科门类：工学
一级学科：矿业工程
文献类型：J
卷号：127
页面范围：32-41
是否译文：否
发表时间：2018-10-01
收录刊物：SCI
附件：