【摘要】 提出低酸—高酸两段逆流浸出含铅锌渣新工艺,低酸浸出考察液固比、时间和温度对锌浸出率的影响,高酸浸出考察初始硫酸浓度、时间和温度对锌浸出率及铅品位的影响。结果表明,在低酸浸出,液固比6∶1、时间5h、温度60℃;高酸浸出,初始硫酸浓度170g/L、时间6h、温度95℃的最优条件下,锌浸出率99.29%,铅入渣率98.58%,高浸渣中铅品位62.25%。更多还原

【Abstract】 A new process of zinc leaching from lead-bearing zinc residue with low and high acidity countercurrent process were studied.The effects of ratio of liquid to solid(L/S),time and temperature on zinc leaching rate were investigated in low acidity leaching process;while the effects of initial H2SO4 concentrations,time and temperature on zinc leaching rate and lead content in high acidity leaching process were investigated.The results show that the leaching ratio of zinc can reach 99.29%,98.25% of lead remains in high acidity leaching residues,the content of lead can reach 62.25% in high acidity leaching residues under the following optimum conditions,which are L/S of 6∶1,reaction time of 5 h,temperature of 60 ℃ in low acidity leaching process;While initial acid concentration of 170 g/L,reaction time of 6 h and temperature of 95 ℃ in high acidity leaching process.更多还原