(中南大学 冶金物理化学研究所，长沙 410083)
摘 要: 研究了熟化法回收硫铁矿浇渣中的铁及其反应机理。将硫铁矿烧渣与硫酸混合后，经过熟化处理可使烧渣中铁的回收率达到90%以上。熟化温度为100～300℃、熟化时间1～2 h、硫酸用量为理论用量的1.0～1.2倍以及硫酸浓度为65%～85%时，铁回收率较高。表面电镜(SEM)实验表明熟化后烧渣变成晶状颗粒，X射线衍射证实熟化烧渣中有FeH(SO4)2·4H2O生成。
关键字: 硫铁矿；烧渣； 熟化； 机理
（Metallurgical Physical Chemistry Institute， Central South University，
Changsha 410083, P.R.China）
Abstract:The maturation of pyrite cinders for recovering iron and its mechanism were studied. The rate of iron recovery of pyrite cinders is up to 90% by maturation treatment after pyrite cinders mixing with sulfur acid. Higher rate of iron recovery can be obtained when maturation temperature is 100～300 ℃， maturation time 1～2 h，sulfur acid 1～1.2 times of theoretical quality and concentration of sulfur acid 65%～85%. SEM demonstrated that the globular cinders become crystal grains after maturation. XRD analysis proved that FeH(SO4)2·4H2O is produced after maturation.
Key words: pyrite； cinder； maturation； mechanism
