用脱碲铅渣制备三盐基硫酸铅的研究  

STUDY ON PREPARATION OF TRIBASIC LEAD SULFATE FROM LEAD SLAG FORMED DURING TELLURIUM

作　　者：马玉天[1] 龚竹青[1] 李宏煦[2] 陈文汩[1] 阳征会[1] 杨余芳[1] 

机构地区：[1]中南大学冶金科学与工程学院 [2]北京科技大学冶金生态学院,北京100083

出　　处：《矿冶》2005年第4期38-41,37,共5页Mining And Metallurgy

基　　金：国家自然科学基金资助项目(50204001)

摘　　要：研究了以脱碲铅渣为原料制备三盐基硫酸铅的工艺.该工艺包括NaCl溶液浸出、PbCl2结晶、PbCl2固相转化得到PbSO4、PbSO4合成三盐基硫酸铅.采用此工艺在实验室制得符合HG2340-92标准一级品要求的产品,并确定浸出过程的最佳工艺参数是:NaCl溶液浓度≥5.5mol/L,浸出温度≥100℃,浸出时间120min,CaCl2浓度0.3mol/L,HCl浓度0.15mol/L,液固比8∶1;合成三盐基硫酸铅的最佳工艺条件为:PbSO4∶NaOH＝4∶6(mol比),液固比≈2∶1,室温反应时间60min,溶液的终点pH8.4～8.8.In this paper, the preparation of tribasic lead sulfate from lead slag formed during tellurium extraction was studied. The process involves NaCl solution leaching, crystallization of PbCl2, conversion from PbCl2 to PbSO4,synthesis of 3PbO·PbSO4· H2O from PbSO4. The experiment products met the specification of HG234092 in terms of its first class tribasic lead sulfate. The optimum leaching process parameters were as follows：NaCl concentration 5.5mol/L, leaching temperature 100℃, leaching time 120min, CaCl2 concentration 0.3mol/L, HCl concentration 0.15mol/L,liquid-to-solid ratio 8：1. The optimum synthesizing conditions were： PbSO4-to-NaOH molar ratio 4 ： 6, liquid-to-solid ratio 2 ： 1, reaction time 60min, and final pH8.4 - 8.

关 键 词：铅渣 氯化钠浸出 合成 三盐基硫酸铅 

分 类 号：TQ134.33[化学工程—无机化工] X758[环境科学与工程—环境工程]