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研究论文

摘要：25℃及pH3、5和7时,黄铁矿(FeS₂)经0.1mol·L^-1H₂O₂+0.05%有机螯合剂混合液淋洗后,表面可形成黑色的保护膜,该膜能有效抑制黄铁矿氧化。淋洗400min后,黄铁矿剩余百分率分别为99.78%、99.54%和99.50%,而对照处理却分别为95.79%、97.45%和99.70%.在3种pH条件下,经混合液淋洗480min的黄铁矿再经pH3的0.1mol·L^-1H₂O₂溶液淋洗400min后,样品的剩余百分率分别从对照的94.92%、96.17%和98.16%提高到98.31%、98.84%和98.91%.

Abstract：At 25℃ and pH 3,5 and 7,by leaching pyrite with the solution containing 0.1mol·L^-1 H₂O₂+0.05% chelatingagent, a black film of chelating iron forms on the surface of pyrite,which can control the oxidation of pyrite effectively.The percentages of remnant pyrite leached by the solution for 400min were 99.78%,99.54% and 99.50%,of the three pHs respectively,as the controls were 95.79%,97.45% and 99.70%.When the samples of pyrite treated with the solution containing 0.1mol·L^-1 H₂O₂+0.05% chelatingagent at the three pHs for 480min were leached again with 0.1mol·L^-1 H₂O₂ at pH 3 for 400min,the remains of treated pyrite were increased from 94.92% to 98.31%,96.17%to 98.84% and 98.16% to 98.91% by comparing with the controls.