【摘要】 本试验研究提供了一个湿法炼锌的新型流程。此流程具有:不耗碱、稀散金属回收率高、溶液质量好、铁渣过滤快等优点。1m³扩大试验证实:（1） 高温锌焙砂用于湿法炼锌效果良好;（2） 亚硫酸锌是一种活性还原剂,还原过程温度低、时间短、过剩系数小、还原率高。亚硫酸锌可由制酸尾气（含SO₂0.2～0.5％）用焙砂或烟尘吸收获得,同时顺便解决了废气污染问题;（3） 采用循环富集沉铟,既简化流程又提高铟的富集倍数;（4） 使用透平搅拌保证了Fe²⁺的高速氧化;（5） 采用石灰石作中和剂解决了系统的酸平衡问题并获得贫锌铁渣。更多还原

【Abstract】 This experimental investigation suggests a new flowsheet for the hydrometallurgy of zinc. The flowsheet possesses several advantages: no alkali consumption, high recovery of rare metals, high quality of purified solution, ease of filtration of iron-rich leach residue, etc. After scaling up to one-cubic meter capacity, the experiment has proven that: （1） high-temperature zinc calcine is amenable to hydrometallurgical extraction with excellent results; （2） zinc sulfite is an active reducing agent capable of performing reduction at low temperature, in a short time, with small excess of reagent and high reductive rate. The required zinc sulfite may be prepared by using zinc calcine or flue dust to absorb the acid waste gases （containing 0.2-0.5％ SO₂）, thus simultaneous solving the waste gas pollution problem; （3） The enrichment of indium by cyclic leaching operations not only simplifies the flowsheet but also increases its enrichment factor in solution; （4） a high speed oxidation of ferrous ions is guaranteed by using a turbo-stirrer; and （5） the use of limestone as a neutralizing agent for part of the spent cell acid can achieve acid equilibrium in the system and obtain an iron residue with low zinc content.更多还原