铁矾渣富氧强化还原挥发熔炼工艺研究

Study on Oxygen-Enriched Intensified Reduction and Volatilization Smelting Process of Jarosite Residues

摘要: 在铅锌工业中产生大量的含锌铅基固废，对环境和资源造成压力。本文以铁矾渣为原料，进行了富氧强化挥发还原熔炼实验研究，重点研究铁硅比、钙硅比、反应温度、配碳量、富氧浓度、反应时间对铅、锌挥发率、渣的减量化及尾渣银含量的影响。结果表明，当铁硅比为2、钙硅比为0.4，还原温度为1250℃、配碳量为10 wt%、富氧浓度40% vol，反应时间为60 min时，锌、铅的挥发率分别为99.34%、98.77%，渣的减量率达到51.65%，尾渣银含量为12.45 g/t。

Abstract: A large number of Zinc-lead-based solid wastes are produced by lead and zinc industry, which puts pressure on the environment and resources. This paper studied the influence of iron to silicon ratio, calcium to silicon ratio, reaction temperature, carbon content, oxygen enrichment concentration, and reaction time on the volatilization rate of lead and zinc reduction and tailings silver content, through Oxygen-enriched Reduction Smelting Process of jarosite residues. The research shows that when the ratio of iron to silicon is 2, the ratio of calcium to silicon is 0.4, the reduction temperature is 1250˚C, the carbon content is 10 wt%, the oxygen concentration is 40%, and when the reaction time is 1 h, the volatilization rates of zinc and lead were 99.34%, 98.77% respectively, while the reduction of slag reached 51.65%, and the silver content of tailings was 12.45 g/t.