锌冶炼废渣的综合利用

发布时间：2018-10-10 11:19

【摘要】：研究了以锌矿提锌过程中产生的废渣为原料,采用水浸的湿法工艺,浸取液净化除杂生产硫酸锌产品;水浸渣经煅烧、脱硅制备氧化铁红的新工艺。通过实验确定的最佳工艺条件:1)硫酸锌制备工序:水浸时间为1.5 h,温度为70~80℃,液固比m(水)∶m(废渣)=0.8∶1,氧化剂双氧水的用量为10 m L/L,置换助剂锌粉的用量为2 g/L;2)氧化铁红制备工艺条件:煅烧温度为635℃,煅烧时间为1.25 h,氢氧化钠浓度为12 mol/L,碱浸温度为120℃,碱浸时间为2.0 h,在上述条件下制得的铁红产品中氧化铁质量分数为82.61%。该工艺具有资源利用充分,产品附加值高,环境污染小,工艺简单等优点。
[Abstract]:A new process of producing zinc sulfate from waste residue produced in zinc extraction process by using wet process of water leaching and purification of leaching solution to produce zinc sulphate was studied, and the new process of preparing iron oxide red by desilication of leaching slag was studied. The optimum technological conditions determined by experiments are: 1: 1) preparation process of zinc sulfate: water immersion time is 1.5 h, temperature is 70 ~ 80 鈩，

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