Studies of benzyl hydroxamic acid/calcium lignosulphonate addition order in the flotation separation of smithsonite from calcite

作     者：Cheng Liu Yuhua Zhu Kaihua Huang Siyuan Yang Zhian Liang Cheng Liu;Yuhua Zhu;Kaihua Huang;Siyuan Yang;Zhian Liang

作者机构：School of Resources and Environmental EngineeringWuhan University of TechnologyWuhan 430070China South China Institute of Environmental SciencesMinistry of Ecology and EnvironmentGuangzhou 510530China State Key Laboratory of Mineral ProcessingBGRIMM Technology GroupBeijing 102600China State Key Laboratory of Comprehensive Utilization of Low-Grade Refractory Gold OresXiamen 361101China 

出 版 物：《International Journal of Mining Science and Technology》 (矿业科学技术学报（英文版）)

年 卷 期：2021年第31卷第6期

页      面：1153-1158页

核心收录：

学科分类：0819[工学-矿业工程] 081902[工学-矿物加工工程] 08[工学] 0703[理学-化学] 

基　　金：the support of Natural Science Foundation of China (51804238, 51904214) the Open Foundation of State Key Laboratory of Mineral Processing, BGRIMM Technology (No. BGRIMM-KJSKL-2021-22) the Fundamental Research Funds for the Central Universities (2021IVA110, 2021IVA039)。 

主　　题：Smithsonite Calcite Benzyl hydroxamic acid Calcium lignosulphonate Flotation separation 

摘      要：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.