硫化锑金精矿冶炼工艺优化及生产实践

湖南辰州矿业有限责任公司冶炼厂根据生产实践,对制粒工序、鼓风炉工序、灰吹炉工序、纯炉工序、炼金炉工序及湿法提金工序等进行了优化,取得了良好生产效果,提高了金、锑回收率,金、锑回收率分别达到96.81%、96.33%。通过对其优化措施及效果进行总结和分析,为该冶炼厂进一步提高金、锑回收率提供技术支撑,也为同类型冶炼企业工艺优化提供参考。

硫化锑金精矿鼓风炉冶炼工艺生产实践

鼓风炉挥发熔炼具有低料柱、薄料层、高焦率和热炉顶等特点。以辰州矿业冶炼厂生产实践为例,介绍了鼓风炉挥发熔炼工艺流程、设备结构及优缺点,总结了生产过程中存在的能耗高、尾气二氧化硫无法回收利用、炉龄短及无序跑冒等问题,给出了解决措施及建议,为鼓风炉挥发熔炼工艺应用优化提供借鉴。

Effect of Fe/SiO2 and CaO/SiO2 mass ratios on metal recovery rate and metal content in slag in oxygen-enriched direct smelting of jamesonite concentrate

The oxygen-enriched direct smelting of jamesonite concentrate was carried out at 1250℃by changing the slag composition.The effects of Fe/SiO2 and Ca O/SiO2 mass ratios on the metal recovery rate as well as metal content in slag were investigated.Experimental results indicated that the metal(Pb+Sb)recovery rate was up to 88.30%,and metal(Pb+Sb)content in slag was below 1 wt.%under the condition of slag composition of 21-22 wt.%Fe,19-20 wt.%SiO2 and 17-18 wt.%Ca O with Fe/SiO2 mass ratio of 1.1:1 and Ca O/SiO2 mass ratio of 0.9:1.The microanalysis of the alloy and slag demonstrated that the main phases in the alloy contained metallic Pb,metallic Sb and a small amount of Cu2 Sb and Fe Sb2 intermetallic compounds.The slag was mainly composed of kirschsteinite and fayalite.Zinc in the raw material was mainly oxidized into the slag phase in the form of zinc oxide.