【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。更多还原

【Abstract】 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 HG2340-92 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 pH8.4～8.8.更多还原