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。
The maturation of pyrite cinders for recovering iron and its mechanism were studied. The rate of iron recovery of pyrite cinder s is up to 90 % by maturation treatment after pyrite cinders mixing with sulfur acid. Higher rat e of iron recovery can be obtained when maturation temperature is 100~300 ℃, maturation time 1~2 h, sulfur acid 1~1.2 times of th eoretical quality and concentration of sulfur acid 65%~85%. SEM demonstrated t hat the globula r cinders become crystal grains after maturation. XRD analysis proved t hat FeH(SO4)2*4H2O is produced after maturation.
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