高铁闪锌矿加压浸出过程中Fe的动力学研究

Kinetic study of iron on pressure leaching marmatite

进行了高铁闪锌矿加压浸出过程Fe的动力学研究。考察了温度、压力、始酸浓度、矿样粒度、溶液中Fe ^(2+)浓度对Fe浸出率的影响。结果表明,在试验条件下,浸出初期Fe的漫出速率受化学反应控制,遵循“未反应核减缩型”表面化学反应控制的动力学规律,浸出后期受固膜扩散控制,浸出中期由二者共同控制。

The kinetics of iron of oxygen pressure leaching maematite is investigated. The effects of temperature, oxygen partial pressure,initial acid concentration, partical size and concentration of Fe^2＋ added into the solution on the leaching rate of iron are examined. The experiment demonstrates that the leaching process follows the surface chemical reaction control kinetic law of ＂shrinking of unreacted core＂ in the initial stages of leaching, the leaching process follows the diffusion control kinetic law of liquid state film of solid surface in the evening of leaching and the leaching process are controlled together by the surface chemical reaction and the diffusion.