This study explores the selective depression mechanism of pyrite by proanthocyanidins (PC) during chalcopyrite-pyrite flotation separation. The selective inhibition effect of inhibitor PC was examined through flotation experiments. The depression mechanism of PC on pyrite was analyzed employing X-ray photoelectron spectroscopy (XPS) analysis, selective adsorption tests, adsorption experiments, contact angle measurement, and zeta potential measurement. The artificial mixed mineral flotation test of chalcopyrite-pyrite at a ratio of 1:12 was conducted under pH 7, PC concentration of 75 mg/L, and PAX concentration of 18.75 mg/L. The copper concentrate exhibited a recovery rate of 88.97%, with a copper grade of 29.43%. The sulfur grade in copper concentrate was 40.35%, and the pyrite recovery rate was 1.97%. PC can be used as a potential depressant of pyrite. adsorption experiments and Zeta potential measurement indicated that PC treatment significantly impeded PAX adsorption on the pyrite surface, as confirmed by XPS test results and Ion adsorption analysis.

中文翻译：

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一种源自葡萄籽提取物（GSE）的环保抑制剂，作为低碱度条件下黄铁矿与黄铜矿浮选分离的抑制剂


本研究探讨了黄铜矿-黄铁矿浮选分离过程中原花青素（PC）对黄铁矿的选择性抑制机制。通过浮选实验考察了抑制剂PC的选择性抑制效果。通过X射线光电子能谱（XPS）分析、选择性吸附试验、吸附实验、接触角测量和zeta电位测量，分析了PC对黄铁矿的抑制机理。在 pH 7、PC 浓度 75 mg/L、PAX 浓度 18.75 mg/L 条件下进行黄铜矿-黄铁矿 1:12 的人工混合矿物浮选试验。铜精矿回收率为88.97%，铜品位为29.43%。铜精矿硫品位40.35%，黄铁矿回收率为1.97%。 PC 可用作黄铁矿的潜在抑制剂。吸附实验和 Zeta 电位测量表明，PC 处理显着阻碍了 PAX 在黄铁矿表面的吸附，XPS 测试结果和离子吸附分析证实了这一点。