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提出了一种废铅酸蓄电池胶泥低温熔盐还原固硫熔炼新工艺,该工艺以次氧化锌作固硫剂,焦粉为还原剂,在800～900℃的工业纯碱熔体中还原熔炼废铅酸蓄电池胶泥,实现了再生铅的低温、低碳、清洁冶炼。在理论分析的基础上,研究了工艺条件对熔炼过程的影响。结果表明,在纯碱质量为固态物的2.835倍、固硫剂为理论量的1.1倍、还原剂为胶泥的16%、熔炼温度为880℃的最优条件下,获得很好的冶炼指标:铅的直收率和总回收率分别为96.64%和98.06%,氧化锌固硫率为94.70%。新工艺具有低温、低碳、低耗、高效、清洁和过程简单等优点,对废铅酸蓄电池胶泥及铅烟尘等再生铅原料的清洁冶炼和原生铅(锑、铋)的清洁冶金均具有重要意义。
A new process of low temperature molten salt reduction and sulfur smelting for the lead-acid battery clay was proposed. The process uses zinc oxide as a sulfur-fixing agent and coke powder as reductant, and smelts waste smelting waste in an industrial soda ash melt at 800-900 ℃ Lead-acid battery clay, to achieve the regeneration of lead low-temperature, low-carbon, clean smelting. Based on the theoretical analysis, the influence of process conditions on the melting process was studied. The results show that good smelting index is obtained when the soda ash is 2.835 times of the solid matter, the sulfur fixing agent is 1.1 times the theoretical amount, the reducing agent is 16% of the clay and the smelting temperature is 880 ℃. Lead The direct recovery rate and the total recovery rate were 96.64% and 98.06% respectively, and the sulfur fixation rate of zinc oxide was 94.70%. The new process has the advantages of low temperature, low carbon, low consumption, high efficiency, simple cleaning and simple process, etc. It is important for the clean smelting of lead raw materials such as waste lead acid battery clay and lead soot and the clean metallurgy of primary lead (antimony and bismuth) significance.