高铅Zn焙砂的浸出工艺行为研究

针对高铅Zn焙砂在浸出工艺中的行为，以Pb含量为7.20%的Zn焙砂为原料，开展了两段酸浸工艺的实验研究，将Zn焙砂中的Zn进行浸出，而Pb在渣中进行富集。实验探究了中性浸出、酸性浸出过程中温度、酸浓度、液固比、时间等不同因素对锌的浸出率和铅富集效率的影响。实验结果表明，在中性浸出过程中，Zn浸出率为90.73%，Pb在中浸渣中的富集含量为29.68%；中浸渣经酸浸处理，Zn浸出率可以达到98.60%，Pb在酸浸渣中的富集含量为36.54%。

Study on the leaching process behavior of High-Lead Zn calcine

In view of the leaching behavior of high lead Zinc calcine, a two-stage acid leaching experiment was carried out with 7.20% Pb content of Zn calcine as raw material, Zn was leached out of Zn calcine and Pb was enriched in residue. The experiment explored the influence of different factors such as temperature, acid concentration, liquid-to-solid ratio, time and other factors in the neutral leaching and acid leaching processes on the leaching rate of zinc and the enrichment efficiency of lead. The experimental results show that during the neutral leaching process, the leaching rate of Zn is 90.73%, and the enrichment content of Pb in the intermediate leaching residue is 29.68%; after the acid leaching treatment of the intermediate leaching residue, the leaching rate of Zn can reach 98.60%, the enriched content of lead in the acid leaching residue is 36.54%.