Abstract Lizardite is representative of a group of serpentine minerals that coexists with nickel sulfide minerals, and the lizardite slime coating that easily forms on surfaces during mineral processing, making it difficult for beneficiation. In this study, a biodegradable polyepoxysuccinic acid (PESA) was introduced as a novel depressant to eliminate the adverse effects of lizardite slimes on pentlandite flotation. The results of microflotation tests and adsorption measurements showed that PESA addition considerably increased the separation efficiency of pentlandite from lizardite slimes, which could be attributed to the improvement of collector adsorption density on the pentlandite surface. Zeta potential measurements and DLVO calculations showed that the lizardite surface charge changed from positive to negative in the presence of PESA, and the resulting electrostatic repulsion caused hetero-dispersion between pentlandite and lizardite particles. Consequently, a collector could adsorb onto the exposed pentlandite surface, restoring the floatability of pentlandite. X-ray photoelectron spectroscopy (XPS) analysis was used to characterize the chemical interactions between PESA and the Mg sites on the lizardite surface. These results demonstrate that PESA can be used as an effective depressant for removing lizardite slimes from the pentlandite surface in a flotation system.

中文翻译：

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一种新的抑制剂聚环氧琥珀酸用于浮选从蜥蜴矿泥中分离五角闪石的探索

摘要 蜥蜴石是一组与硫化镍矿物共存的蛇纹石矿物的代表，在选矿过程中容易在表面形成蜥蜴石泥涂层，难以进行选矿。在这项研究中，引入了一种可生物降解的聚环氧琥珀酸 (PESA) 作为一种新型抑制剂，以消除蜥蜴矿泥对戊铁矿浮选的不利影响。微浮选试验和吸附测量结果表明，PESA 的加入显着提高了锂铁矿从蜥蜴矿泥中的分离效率，这可能归因于锂铁矿表面捕收剂吸附密度的提高。Zeta 电位测量和 DLVO 计算表明，在 PESA 存在下，蜥蜴表面电荷由正变为负，并且由此产生的静电排斥导致镍黄铁矿和蜥蜴石颗粒之间的异质分散。因此，捕收剂可以吸附到暴露的镍黄铁矿表面，恢复镍黄铁矿的可漂浮性。X 射线光电子能谱 (XPS) 分析用于表征 PESA 与蜥蜴表面上的 Mg 位点之间的化学相互作用。这些结果表明，PESA 可用作一种有效的抑制剂，用于在浮选系统中从镍黄铁矿表面去除蜥蜴矿泥。X 射线光电子能谱 (XPS) 分析用于表征 PESA 与蜥蜴表面上的 Mg 位点之间的化学相互作用。这些结果表明，PESA 可用作一种有效的抑制剂，用于在浮选系统中从镍黄铁矿表面去除蜥蜴矿泥。X 射线光电子能谱 (XPS) 分析用于表征 PESA 与蜥蜴表面上的 Mg 位点之间的化学相互作用。这些结果表明，PESA 可用作一种有效的抑制剂，用于在浮选系统中从镍黄铁矿表面去除蜥蜴矿泥。