低品位雄黄矿浮选研究

A STUDY ON LOW GRADE REALGAR FLOTATION

通过改进浮选工艺、提高磨矿粒度、添加调整剂，改善了低品位雄黄矿的浮选效果，实验室试验结果表明，对于含砷４８８％的原矿，菜油作捕收剂、２号油作起泡剂，经一粗二精闭路流程选别，可获得含ＡｓＳ９０７７％的雄黄精矿。生产实践表明，对于含砷５４６％的原矿，在磨矿粒度－００７５ｍｍ粒级占６５％，菜油３０ｇ／ｔ，２号油１５ｇ／ｔ条件下，经一粗二精流程选别，可获得含ＡｓＳ９０２０％的雄黄精矿，回收率为６５％。

Good flotation results of lowgrade realgar have been obtained by improving flotation technigues, increasing grind and adding modifying agent. The laboratory test results show that realgar concentrate containing 9077% AsS can be obtained by separating feed containing 488% As by one stage of roughing and 2 stages of cleaning using rapeseed oil as collector and pine oil as frothering agent. In production practice, realgar concentrate containing 9020% AsS can be obtained by separating feed containing 546% As by one stage of roughing and two stages of cleaning at a grind of 65 percent minus 0075 mm, doses of 30 g/t of rapeseed oil and 15 g/t of pine oil, and a recovery of 65%.