闪锌矿的耦合浸出与铁的分离

Coupling Leaching of Sphalerite and Separation of Iron

提出了闪锌矿直接浸出与混合萃取分离耦合的操作模式,探讨了H2SO4HNO3O2C2Cl4/P204体系的耦合浸出原理与铁的分离利用.结果表明,耦合浸出过程的表观活化能为19.6kJ/mol,锌的浸出分数达0.946,大大高于普通浸出.耦合浸出流程实现了锌、硫和铁的分离,并获得了氧化铁纳米粉.

Coupling treatment of oxidation leaching and extraction separation of sphalerite has been put forward, and the mechanisms of leaching with oxidation reagents (H2SO4HNO3O2) and mixed extractive reagents of tetrachloroethylene and 2-ethylhexyl 2-ethylhexylphosphate are discussed. The results show that the process activation energy of coupling leaching is 19.6 kJ/mol and the extracted fraction of zinc is 0.946, which is much higher than that with common leaching. The separation of zinc, sulfur and iron (the iron was obtained in the form of Fe2O3 nano-powder) was completed in the coupled leaching process with Fe2O3 nano-powder obtained.