摘要
研究了硫铁矿烧渣与硫酸反应动力学。研究结果表明Fe3O4反应活性远远高于Fe2O3,铁浸出率由烧渣中Fe2O3与硫酸的反应速度决定。Fe2O3与硫酸反应动力学为颗粒缩小缩芯扩散控制,烧渣中Fe2O3与硫酸反应的活化能为6.936 kJ/mol。当硫酸质量分数为43%、硫酸用量为理论用量、反应温度为80℃、反应时间2 h时,当搅拌速度从0增加到400 r/m in时,铁的浸出率从19.5%增加到45%。
The leaching kinetics of pyrite cinder and sulfuric acid reaction was studied. The study results show that Fe3O4 is more reactive than Fe2O3 when cinders react with H2SO4; the leaching rate of iron is decided by the reaction rate of Fe2O3 and H2SO4; the reaction between Fe2O3 and H2SO4 is controlled by diffusion, and the reaction is applicable to the shrinking core model. The activation energy of the reaction is 6. 936 kJ/mol. The leaching rate of iron is increased from 19.5% to 45% when the agitation rate is increased from 0 to 400 r/min, the mass fraction of sulfuric acid is 43%, the dosage of sulfuric acid is the theoretic dosage, the reaction temperature is 80℃, and the reaction time is 2 h.
出处
《化学工程》
CAS
CSCD
北大核心
2006年第11期36-39,共4页
Chemical Engineering(China)
关键词
硫铁矿烧渣
硫酸
浸取
动力学
pyrite cinder
sulfuric acid
leaching
kinetics
