A new process for accumulation and purification of lead sulfide from complex lead ore

The conventional method for producing lead sulfide (PbS) suffers from issues such as low efficiency, heavy pollution, and high raw material requirements. This study introduces a novel approach aggregation followed by purification, for the preparation of PbS from complex lead ore. The feasibility of separating and enriching PbS under vacuum conditions is analyzed theoretically. The initial stage of vacuum accumulation focuses on investigating the impact of distillation temperature and distillation time on the sublimation and direct yield of PbS in minerals with a vacuum pressure of 5Pa. The findings indicate that optimal PbS accumulation parameters are achieved at 1103 K for 60 min, resulting in a direct yield of 99.10%. The subsequent step involves distillation purification, wherein PbS is subjected to distillation at 923 K for 120 min. This process enhances the purity of PbS to over 99.50%, with a direct yield of 96.19%. The method of accumulation followed by purification presents a new and promising approach for the efficient acquisition of PbS, offering a viable means for the comprehensive utilization of complex lead ore. This method can alleviate the current challenge of relying solely on high-grade lead concentrate for lead supply.

Automated summary

The conventional method of producing lead sulfide has multiple issues, and this study introduces a new approach of aggregation followed by purification to obtain PbS from complex lead ore. The experiment shows that under specific conditions, high-purity PbS can be efficiently acquired, offering a feasible means for the comprehensive utilization of complex lead ore.