氧压浸出处理黑铜泥

Treatment of Black Copper Mud by Oxygen Pressure Leaching

氧压浸出工艺作为一种强化冶金技术,具有技术指标稳定、作业环境良好、生产成本较低的特点,且对黑铜泥中砷浸出效果优于常规氧化酸浸、氧压碱浸。采用氧压浸出工艺处理黑铜泥,探索了硫酸初始浓度、压力、反应温度、液固比、反应时间等对铜、砷浸出的影响。结果表明,在液固比8 mL/g、硫酸初始浓度80 g/L、反应温度120℃、氧分压0.3 MPa、反应时间2 h的条件下,铜、砷浸出率分别达到99.78%、97.08%,其中砷浸出率分别比氧化酸浸、氧化碱浸工艺高出7.79、9.76个百分点。氧压浸出是黑铜泥浸出处理工艺的良好选择,适合常规铜冶炼企业技术升级改造。

As an enhanced metallurgical technology,oxygen pressure leaching process has the characteristics of stable technical index,good operating environment and low production cost,and the leaching effect of arsenic from black copper mud is better than conventional oxidation acid leaching and oxygen pressure alkali leaching.Black copper mud was treated by oxygen pressure leaching process,and effects of initial concentration of sulfuric acid,pressure,reaction temperature,L/S,and reaction time on the leaching of copper and arsenic were explored.The results show that when L/S is 8 mL/g,initial concentration of sulfuric acid is 80 g/L,reaction temperature is 120℃,partial pressure of oxygen is 0.3 MPa,and reaction time is 2 h,the leaching rate of copper and arsenic is 99.78% and 97.08% respectively,and the leaching rate of arsenic is 7.79 and 9.76 percent points higher than that of oxidation acid leaching and oxidation alkali leaching,respectively.Oxygen pressure leaching is a good choice of black copper mud leaching process and suitable for upgrading of conventional copper smelting enterprises.