含锌冶金尘泥氨浸溶蚀实验研究

冶金尘泥是钢铁工业生产过程中排放的固体废弃物,含有丰富的铁、碳、锌、铅等有价成分,是我国再生锌原料的重要来源.本实验以含锌尘泥为原料,采用氨水/氯化铵为复合浸出剂进行湿法浸锌工艺研究.结果表明:在总氨浓度6mol/L、氨水/铵根离子比例为1∶1、浸出温度为60℃、液固比为6∶1、浸出时间2h、搅拌速度为500r/min的条件下,锌的浸出率达到了85.44％.在较佳参数条件下进行了多次浸出验证实验,锌的浸出率均大于85％,实现了锌的高效选择性浸出.

Study on treating zinc-bearing dust by Ammonia leaching process

Metallurgical dust discharged during the steel manufacturing process belongs to solid waste, which is rich in valuable elements such as iron, carbon, zinc and lead. It is the main raw material source of recycled zinc in China. In this process, wet immersion zinc was studied on the raw materials with ammonia/ammonium chloride as the composite leaching agent. The experimental data showed that the total ammonia concentration was 6 mol/L, the ammonia/ammonium ion ratio was 1:1, the leaching temperature was 60 °C, the liquid-solid ratio was 6:1, the leaching time was 2 h, and the stirring speed was 500 r/min. The zinc leaching rate was 85.44%. The leaching was tested under the optimal parameters. The data showed that the leaching rate of zinc was more than 85%, and the efficient selective leaching of zinc was achieved.