工程科学学报2016，Vol.38Issue(10)：1404-1409,6.DOI:10.13374/j.issn2095-9389.2016.10.008
含铅废渣料还原造锍熔炼回收铅和银工艺
Recovery of lead and silver from lead-bearing wastes using reducing--matting smelting process
摘要
Abstract
In view of the difficulty in environmental and economic treatments of lead-bearing wastes generated in lead and zinc smelter, a new reducing-matting smelting process was proposed to recycle secondary lead from multiple lead-bearing wastes in this pa-per. In the process, the designed mixture of lead sludge, lead slag, lead ashes and pyrite cinder was used as a smelting object, and ferric oxide, soda and mirabilite and coal powders were a sulfur-fixing agent, additive and reductant, respectively. The effects of fac-tors on the direct recovery rates of lead and silver during the smelting process were studied in detail based on thermodynamic calcula-tions. The optimum conditions are obtained as the following:the mass ratio of FeO to SiO2 is 1. 10, the mass ratio of CaO to SiO2 is 0. 30, the mass ratio of Na2 CO3 to Na2 SO4 is 0. 7:0. 3, the dosage of coal powders is 15% of lead-bearing wastes, the smelting tem-perature is 1200℃, and the smelting time is 2 h. Comprehensive experiments show that under the optimum conditions, the direct re-covery rates of lead and silver are 85. 95% and 83. 15%, respectively. The process has significant advantages of sulfur fixation, com-prehensive utilization and one-step lead smelting.关键词
固体废弃物/回收利用/铅/银/熔炼/综合利用Key words
solid wastes/recycling/lead/silver/smelting/comprehensive utilization分类
矿业与冶金引用本文复制引用
叶龙刚,林文荣,陈永明,李云,唐朝波..含铅废渣料还原造锍熔炼回收铅和银工艺[J].工程科学学报,2016,38(10):1404-1409,6.基金项目
国家自然科学基金资助项目(51234009,51104182) （51234009,51104182）
