某含锌烟尘中性—酸性两段浸出试验  

Study about Two-stage Neutral-acid Leaching Process on A Zinc-borne Dust

作　　者：李岩[1,2] 杨丽梅[1,2] 徐政[1,2] 徐瑞[1,2] 王巍[1,2] 

机构地区：[1]北京有色金属研究总院 [2]生物冶金国家工程实验室

出　　处：《金属矿山》2013年第2期164-168,共5页Metal Mine

基　　金："十二五"国家科技支撑计划项目(编号:2011BAE23B00)

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。In order to recycle zinc from zinc oxide of the waste galvanized sheet zinc-borne dust, two-stage neutralacid continuous leaching process was conducted. Through the conditional tests, the optimal technieal 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 2： for 80 nfin, 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.

关 键 词：废镀锌钢板 含锌烟尘 中性-酸性两段浸出 浸出终点pH 

分 类 号：TQ324.404[化学工程—合成树脂塑料工业]