镍钼矿氧压水浸过程铁和硫的转化溶解行为模拟研究

针对镍钼矿中硫铁矿的氧压水浸行为,以硫铁矿为研究对象,研究压力场下初始硫酸浓度、温度、氧分压、矿物粒度对硫铁矿氧压水浸行为的影响。结果表明:硫铁矿氧压水浸过程中,铁元素主要以离子形式存在溶液中,少部分以三氧化二铁、铁矾留在渣中;硫元素在整个反应过程中主要以硫酸根的形式存在溶液中,少部分以单质硫的形式存在渣中;外加初始酸的条件下,反应初期耗酸量大于成酸量为耗酸反应,反应中后期成酸量大于耗酸量为成酸反应;不加初始酸的条件下为成酸反应。

Translation and Dissolving Behavior of Iron and Sulfur in Oxygen Pressure Water Leaching of Pyrite from Ni-Mo Ore

Aiming at conversion behavior of pyrite by oxygen pressure leaching, pyrite in Ni-Mo ore is taken as the research object to investigate effects of initial sulfuric acid solution, temperature, oxygen partial pressure, and particle size on oxidation translation behavior of pyrite under pressure filed. The results show that iron exists in solution in form of ions with small part of element iron remaining in form of hematite and iron jarosite in residue during whole reaction. Sulfur exists in solution in form of sulfate and a small amount of elemental sulfur come into shape in residue during whole reaction. Under the reaction conditions with addition of initial acid, acid consumption is bigger than acid formation in initial stage of reaction, while in later reaction the amount of acid produced is more than the amount of acid consumed. Acid is produced without addition of initial acid.