多金属复杂金精矿硫酸化焙烧热力学分析  

Thermodynamics analysis of poly-metallic and complex gold concentrate in the process of sulphation roasting

作　　者：王瑞祥[1] 曾斌[1] 余攀[1] 毛继勇[1] 谢博毅[1] 

机构地区：[1]江西理工大学冶金与化学工程学院

出　　处：《黄金》2013年第12期47-51,共5页Gold

基　　金：国家自然科学基金资助项目(51164011);福建省区域科技重大合作项目(2011H4025)

摘　　要：对多金属复杂金精矿硫酸化焙烧主要反应热力学数据进行计算,导出ΔG0T-T函数,并绘制ΔG0T-T图和lg p SO2-lg p O2图。经分析可知,焙烧温度和焙烧气氛对多金属复杂金精矿硫酸化焙烧效果影响显著。对比高氧压气氛焙烧和常规氧压气氛焙烧lg p SO2-lg p O2图得出,高氧压更有利于硫酸化焙烧。在高氧压气氛条件下(p O2=0.42×105Pa),硫酸化焙烧最适温度控制为963 K,温度控制上限为1 055 K。△GT0-T function of main chemical reaction of poly-metallic and complex gold concentrate in the process of sulphation roasting was calculated thermodynamically. Then the relation diagram was drawn for △GT^0-T chart and lg Pso2-1g Po2 chart. The analysis of thermodynamics calculation data shows that the roasting temperature and the gaseous phase composition affect the roasting quality significantly. By contrast illustrated on the lg Pso2-1g Po2 chart, the higher the oxygen pressure goes, the more easily the sulphate synthesis is done. Under the high oxygen pressure condi- tion （Po2 =0.42 - 105 Pa） ,the optimal roasting temperature and the ceiling temperature respectively were 963 K and 1 055 K.

关 键 词：金精矿 热力学分析 硫酸化焙烧 吉布斯函数 

分 类 号：TF831[冶金工程—有色金属冶金]