期刊
INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY
卷 31, 期 6, 页码 1153-1158出版社
ELSEVIER
DOI: 10.1016/j.ijmst.2021.09.005
关键词
Smithsonite; Calcite; Benzyl hydroxamic acid; Calcium lignosulphonate; Flotation separation
资金
- Natural Science Foundation of China [51804238, 51904214]
- Open Foundation of State Key Laboratory of Mineral Processing, BGRIMM Technology [BGRIMM-KJSKL-2021-22]
- Fundamental Research Funds for the Central Universities [2021IVA110, 2021IVA039]
In this study, a reagent scheme of depressant calcium lignosulphonate (CLS) and collector benzyl hydroxamic acid (BHA) was introduced to facilitate the flotation separation of smithsonite from calcite. The addition order of BHA before CLS was found to be crucial for efficiently flotation of smithsonite from calcite, leading to optimal flotation separation performance.
Flotation separation of smithsonite from calcite is difficult due to their similar surface properties. In the present study, a reagent scheme of depressant calcium lignosulphonate (CLS) and collector benzyl hydroxamic acid (BHA) was introduced in the flotation of smithsonite from calcite. Microflotation tests revealed that the efficient flotation of smithsonite from calcite could only be obtained with the addition order of BHA before CLS, which was opposite to the widely-used order that adding depressant prior to the collector. The zeta potential measurements indicated that BHA selectively adsorbed onto smithsonite surface, then not allowed the CLS adsorption onto the smithsonite surface rather than calcite surface because of the steric hindrance, thereby the smithsonite surface remained hydrophobic while calcite surface became more hydrophilic after the addition of CLS. As a result, the calcite flotation was completely depressed while the smithsonite flotation recovery was still in high value, leading to the optimal flotation separation performance. (C) 2021 Published by Elsevier B.V. on behalf of China University of Mining & Technology.
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