ABSTRACT The effects of various activators on the flotation behaviour of lime-depressed pyrrhotite (FeS1.1) were investigated. The activation mechanisms were studied using electrochemical analysis, Fourier transform infrared spectroscopy, zeta potential measurements, and X-ray photoelectron spectroscopy. Micro-flotation results showed that the floatability of pyrrhotite declined sharply from 97.6% to 5.1% with the addition of lime. The flotation performance improved with the addition of both acid and salt activators; oxalic acid was the best activator, with a recovery > 97.0%. Ca- and Fe-based hydrophilic films formed on the lime-depressed pyrrhotite surface, preventing the adsorption and oxidation of the collector on the pyrrhotite surface. The activator increases its own surface potential to prevent the production of hydrophiles, and also removed hydrophiles from the pyrrhotite surface. In addition, the oxalic acid formed a stable chelate and removed hydrophilic material from the pyrrhotite surface. This study contributes to understanding the flotation mechanism and activation of lime-depressed pyrrhotite.

中文翻译：

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不同活化剂对沉灰磁黄铁矿浮选性能的影响

摘要 研究了各种活化剂对石灰抑制磁黄铁矿 (FeS1.1) 浮选行为的影响。使用电化学分析、傅里叶变换红外光谱、zeta 电位测量和 X 射线光电子能谱研究了活化机制。微浮选结果表明，随着石灰的加入，磁黄铁矿的可浮性从97.6%急剧下降到5.1%。酸和盐活化剂的加入提高了浮选性能；草酸是最好的活化剂，回收率> 97.0%。钙基和铁基亲水膜在石灰凹陷磁黄铁矿表面形成，阻止了捕收剂在磁黄铁矿表面的吸附和氧化。活化剂增加其自身的表面电位以防止产生亲水物，并且还去除了磁黄铁矿表面的亲水性物质。此外，草酸形成稳定的螯合物并从磁黄铁矿表面去除亲水性物质。该研究有助于了解沉灰磁黄铁矿的浮选机理和活化作用。