由方铅矿精矿直接制备硫酸铅粉末材料的方法

针对硫酸铅传统生产工艺存在工艺流程长,能耗和成本高的缺点,以方铅矿为研究对象,通过三步法即三氯化铁浸出方铅矿精矿、选择性除杂和化学沉淀法,将硫化铅精矿直接转化为硫酸铅粉末材料.研究结果表明:产品转化率为97.39%,纯度超过99%,平均晶粒粒度约为32 nm与传统生产工艺相比,采用三步法不但可以简化工艺流程,节约能耗,降低生产成本,而且在工艺过程中无铅蒸汽和二氧化硫等气体产生,可以实现硫酸铅的清洁生产.

Method of direct preparation of lead sulfate powders from galena concentrates

In traditional process of lead sulfate there exists some disadvantages such as longer flow and higher energy-consumption. In order to explore a new process to produce PbSO_4, the methods of three-step, including the leaching of galena concentrates in ferric chloride media, the selective purification and the method of chemical sedimentation, is developed to convert PbS concentrates into PbSO_4. The results show that the conversion rate reaches 97.39%, and the purity of ~PbSO_4 powder is above 99% with the calculated particle size of crystallites of 32 nm. In this process, the emission of lead vapour and SO_2 cannot be produced. Compared with traditional process, the production process can be simplified and the energy consumption can be decreased, and cleaner production of PbSO_4 can be realised.