摘要
为探索难浸金矿的热解行为,采用STA409PC型同步热分析仪在惰性气氛下对贵州某难浸金矿进行热重试验研究。热重试验结果表明:该金矿在20～1200℃失重可分为3个阶段,即硫的升华失重、砷的升华失重、碳酸盐的分解失重,总失重率为20.86%,热重试验数据与矿石的化学成分基本吻合。对比浸出试验结果表明:难浸金矿经650℃焙烧1 h后浸出率可由12.3%提高到85.4%。可显著提高黄金的浸出率。
To explore the pyrolysis behavior of the refractory gold ore in Guizhou, a refractory gold ore in Guizhou was studied in the thermogravimetric experiment with Setsys Evolution （STA409PC） under the inert atmosphere. The results of thermo-gravimetric experiment showed that the weight loss of this gold ore at the temperature of 20-1200℃ could be divided into three stages, namely, the sublimation weight loss of sulfur, the sublimation weight loss of arsenic, and the decomposition weight loss of carbonate. The rate of overall weight loss was 20.86%. The data were mainly consistent with the chemical composition of the ore. The leaching rate could be increased from12.3% to 85.4% with roasting the refractory gold ore for 1 h at the temperature of 650℃. It can increase the leaching rate of gold significantly.
出处
《贵金属》
CAS
CSCD
北大核心
2013年第1期51-54,共4页
Precious Metals
基金
贵州省科学技术基金(黔科合J字[2010]2003)资助
关键词
有色金属冶金
热重分析
难浸金矿
TG曲线
热解
nonferrous metallurgy
thermogravimetric analysis
refractory gold ore
TG curves
pyrolysis
