含锑复杂硫化矿臭氧协同氧化浸出机理

Mechanism of synergistic oxidation leaching of antimony-bearing complex sulfides ore by ozone

利用臭氧气体作为协同氧化剂,在盐酸体系中配合氧气浸出含锑复杂硫化矿,研究其在不同温度条件下的浸出行为,结合动力学并从间接氧化的角度研究浸出反应机理。结果表明:采用臭氧协同氧化浸出含锑复杂硫化矿,在一定条件下可以有效地浸出其中的锑,锑的浸出率随着温度的升高而升高。相比于氧气氧化浸出,臭氧可以有效地促进浸出反应的进行。动力学分析表明,臭氧可以直接促进化学反应的进行,使得氧化浸出反应过程呈现出不同的动力学控制步骤和参数。

Antimony-bearing complex sulfides ore was processed by oxidation leaching in hydrochloric acid with ozone gas as synergistic oxidant. Leaching behavior at different temperatures was studied, leaching mechanism was analyzed by leaching kinetics combined with indirect oxidation. The results show that antimony in complex sulfides ore could be effective extracted by synergistic oxidation under certain conditions, and the leaching rate of antimony increases with the increase of temperature. Compared with the leaching process with oxygen gas as oxidant, leaching process is efficiently improved by synergistic ozone. Kinetic analysis shows that ozone directly influences the process and promotes chemical reactions, where the leaching process shows different control step and parameters of kinetics model.