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Utilization of polyepoxysuccinic acid as a green depressant for the flotation separation of smithsonite from calcite
Minerals Engineering ( IF 4.8 ) Pub Date : 2021-05-03 , DOI: 10.1016/j.mineng.2021.106933
Cheng Liu , Xuan Wang , Siyuan Yang , Zijie Ren , Chao Li , Zhen Hu

As a green organic acid with biodegradable and low-cost characters, polyepoxysuccinic acid (PESA) was utilized as a depressant to achieve the flotation separation of smithsonite from calcite in this study. Microflotation tests showed that both smithsonite and calcite had good floatability when using sodium oleate (NaOl) as the collector, while calcite was selectively depressed when using PESA as the depressant. The flotation of artificially mixed minerals confirmed that the efficient separation of smithsonite from calcite could be realized in the presence of PESA. A flotation concentrate with 44.56% Zn grade and 81.03% recovery could be obtained from the original feed (26.59% Zn grade) using the reagent scheme of PESA/NaOl. Zeta potential measurement indicated that the addition of PESA might prevent the NaOl adsorption onto a calcite surface rather than a smithsonite surface. X-ray photoelectron spectroscopy (XPS) analysis revealed the strong chemical bonding could only occur between the carboxyl group of PESA and calcium ions at the calcite surface. In contrast, weak interaction occurred between PESA and smithsonite surface, then NaOl was still easily absorbed onto smithsonite surface. These results demonstrated that PESA could be used as a selective depressant for calcite in the smithsonite flotation.



中文翻译:

聚环氧琥珀酸作为绿色抑制剂用于浮选分离新铁矿和方解石

作为一种具有可生物降解和低成本特性的绿色有机酸,本研究利用聚环氧琥珀酸(PESA)作为抑制剂,实现了从方解石中浮选新的新铁矿和新铁矿。微浮选试验表明,当使用油酸钠(NaOl)作为捕收剂时,新铁矿和方解石均具有良好的漂浮性,而当使用PESA作为抑制剂时,方解石被选择性地压制。人工混合矿物的浮选证实,在PESA的存在下,可以实现从方解石中有效分离新铁矿和新铁矿。使用PESA / NaOl试剂方案,可从原始进料(锌等级为26.59%)中获得锌含量为44.56%,回收率为81.03%的浮选精矿。Zeta电势测量表明,添加PESA可能会阻止NaOl吸附在方解石表面而不是铁矿表面。X射线光电子能谱(XPS)分析表明,强化学键只能发生在方解石表面的PESA羧基和钙离子之间。相比之下,PESA与新铁矿表面之间发生了较弱的相互作用,因此NaOl仍易于吸收到新铁矿表面上。这些结果表明,PESA可以作为铁矿浮选中方解石的选择性抑制剂。PESA与新铁矿表面之间发生微弱的相互作用,因此NaOl仍易于吸收到新铁矿表面上。这些结果表明,PESA可以作为铁矿浮选中方解石的选择性抑制剂。PESA与新铁矿表面之间发生微弱的相互作用,因此NaOl仍易于吸收到新铁矿表面上。这些结果表明,PESA可以作为铁矿浮选中方解石的选择性抑制剂。

更新日期:2021-05-03
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