【摘要】 为回收某废镀锌板炼钢烟尘中以氧化锌为主的锌,对其进行了中性—酸性两段浸出试验。首先通过条件试验确定了中性浸出时的适宜工艺参数为始酸浓度0 g/L、液固比9 mL/g、搅拌强度200 r/min、浸出温度25℃、浸出时间80 min,酸性浸出时的适宜工艺参数为始酸浓度20 g/L、液固比9 mL/g、搅拌强度500 r/min、浸出温度25℃、浸出时间80 min,然后按所确定的工艺参数进行中性浸出液为产出液、酸性浸出液返回中性浸出作业的闭路流程试验,试验稳定后锌的浸出率达到90.36%,浸出液中锌的含量为10.14 g/L,铁含量仅为0.56 g/L。更多还原

【Abstract】 In order to recycle zinc from zinc oxide of the waste galvanized sheet zinc-borne dust,two-stage neutral-acid continuous leaching process was conducted.Through the conditional tests,the optimal technical parameters for the neutral leaching were determined as the initial acid concentration 0 g/L,the ratio of liquid to solid 9 mL/g,stirring intensity of 200 r/min,the leaching temperature of 25 ℃ for 80 min,for the acid leaching as the starting acid concentration of 20 g/L,the ratio of liquid to solid 9 mL/g,stirring intensity of 500 r/min,the leaching temperature of 25 ℃ for 80 min.Then under the technical parameters above,a closed-circuit test was made by using the neutral leaching solution as output solution,and the acid leaching return to the neutral leaching solution.In the tests,Zn leaching rate reaches 90.36%.Zn content in leaching solution is 10.14 g/L,and iron content is 0.56 g/L only.更多还原