铅反射炉含铟烟尘氧压酸浸的研究

采用氧压酸浸技术对铅冶炼富铟烟尘进行浸出试验研究,详细考察了硫酸用量、氧分压、温度、液固比、时间、粒度等因素对铟浸出效果的影响,确定了氧压酸浸的最佳条件。结果表明,在下述最佳条件下:初始硫酸浓度180g/L、氧分压0.8MPa、温度150℃、液固比5∶1、时间120min、反应物粒度0.15～0.12mm,铟和锌的浸出率分别达到96.74%和99.19%,渣含铟小于0.02%。

Study on Oxygen Pressure Acid Leaching for Lead Reverberatory Furnace Indium Bearing Dust

Indium bearing dust from lead reverberatory furnace was leached with oxygen pressure acid leaching process.The effects of H2SO4 initial concentration,oxygen partial pressure,leaching temperature,ratio of liquid to solid(L/S),leaching time,and particle size of dust on the leaching were investigated,and the optimum conditions for oxidic-acidic pressure leaching were obtained.The results show that the leaching rate of indium and zinc reaches 96.74% and 99.19% respectively,and the content of indium in slag is reduced to less than 0.02% under the optimum conditions including H2SO4 initial concentration of 180 g/L,oxygen partial pressure of 0.8 MPa,leaching temperature of 150 ℃,L/S of 5∶1,leaching time of 120 min,and particle size of dust of 0.15~0.12 mm.