辉钼精矿熔盐氧化工艺———Na₂CO₃-Na₂MoO₄-Na₂SO₄体系

来源期刊：中南大学学报(自然科学版)2000年第5期

论文作者：孙培梅 刘茂盛 黄永忠 李洪桂 李运姣

文章页码：407 - 410

关键词：辉钼精矿; Na₂CO₃-Na₂MoO₄-Na₂SO₄体系;熔盐氧化

Key words：moybdenite concentrate; Na₂CO₃-Na₂MoO₄-Na₂SO₄system; melting salt oxidation

摘    要：研究了辉钼精矿在Na₂CO₃-Na₂MoO₄-Na₂SO₄体系的熔盐氧化过程,探索了不同工艺参数对钼的转化率和脱硫率的影响.结果表明,在熔盐组成为1∶1,配料比为1∶10,740℃,鼓风速度为5.95 L/min,鼓风时间为10 min的条件下,钼的转化率和脱硫率均可达99%以上.熔炼产物经水浸后,钼精矿中的钼和硫分别以Na₂MoO₄和Na₂SO₄形态进入溶液,以SO₂形态进入熔炼尾气中的硫不超过总硫量的0.8%.

Abstract: The melting salt oxidation of molybdenite in Na₂CO₃-Na₂MoO₄-Na₂SO₄ system has been studied. The effect of processing parameters on the conversion ratio of molybdenum and sweetening ratio has been explored. The results express that, under the conditions of melting salt constitution 1∶1, burden ratio 1∶10, 740 ℃,the velocity of air blast 5.95 L/min, the time of air blast 10 min, the conversion ratio of molybdenum and sweetening ratio could reach over 99%. When melting products are leached with water, molybdenum and sulfur in the concentrate can be dissolved in the form of Na₂MoO₄ and Na₂SO₄ separately. The amount of sulfur in flue gas as the form of SO₂ is less than 0.8% of total sulfur amount.