(中南大學(xué) 冶金物理化學(xué)研究所，長(zhǎng)沙 410083)
摘 要: 研究了熟化法回收硫鐵礦澆渣中的鐵及其反應(yīng)機(jī)理。將硫鐵礦燒渣與硫酸混合后，經(jīng)過(guò)熟化處理可使燒渣中鐵的回收率達(dá)到90%以上。熟化溫度為100～300℃、熟化時(shí)間1～2 h、硫酸用量為理論用量的1.0～1.2倍以及硫酸濃度為65%～85%時(shí)，鐵回收率較高。表面電鏡(SEM)實(shí)驗(yàn)表明熟化后燒渣變成晶狀顆粒，X射線衍射證實(shí)熟化燒渣中有FeH(SO4)2·4H2O生成。
關(guān)鍵字: 硫鐵礦；燒渣； 熟化； 機(jī)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
