试验研究了加温搅拌浸出过程中各因素对黄钾铁矾渣浸出率的影响。结果表明，在温度105℃、液固比10；2、6mol／LNH。C1溶液搅拌浸出2h条件下，Zn、Pb和Cd的浸出率可达95％以上。

A hydrometallurgical process for treating the hazardous jarosite residue from zinc hydrometallurgy was proposed, for not only detoxifying the residue, but also recovering the contained valuable metal components. The jarosite was initially activated and decomposed by sintering at 650°C for 1h. The sintered residue was leached in 6mol L(-1) aqueous NH(4)Cl solution at 105°C, followed by filtration. The leaching extraction of Zn, Pb, Cu, Cd and Ag are more than 95%. During reduction with Zn powder, more than 93% of Pb, Cu, Ag and Cd can be simultaneously recovered. Then the NH(4)Cl leaching residue were leached again in 30wt% aqueous NaOH solution for 1h at 160°C, and about 94% of As and 73% of Si were removed from the residue. The final residue was almost completely detoxified, and contains about 55wt% Fe, which can be used as an iron concentration.

A new process of roasting ammonium chloride leaching alkali leaching for recovery of valuable metals and iron in jarosite residue generated during zinc hydrometallurgy was studied by experiment.After roasting of jarosite at 650℃ for 1 h,the main phase of KFe3(SO4)2(OH)6 containing Pb and Zn was decomposed into Fe2O3,ZnSO4 and PbSO4.When the roasted jarosite residue was leached by 5 times with aqueous solution of 6 mol/L ammonium chloride at 105℃ for 2 h,over 95% of Zn,Pb and Cd in the jarosite was leached and the iron content was raised from 22% to 40%.The leached residue was further leached with 23.08%(ω) NaOH solution at 160℃ for 1 h,Fe content in the final residue was 54%,which could be used as qualified iron concentrate.