(中南大學(xué) 資源加工與生物工程學(xué)院， 長(zhǎng)沙 410083)
摘 要: 研究了高溫高壓條件下鋁土礦中鐵在硫酸介質(zhì)中的溶解行為， 結(jié)果表明:在一定的溫度條件下， 鋁土礦的赤褐鐵礦能較好地溶于硫酸溶液中， 而鋁土礦中含鋁礦物的性質(zhì)不發(fā)生變化， 從而為鋁土礦的進(jìn)一步加工利用提供了條件。詳細(xì)討論了反應(yīng)溫度、 反應(yīng)時(shí)間、 硫酸濃度、 液固比等因素對(duì)鐵的溶解行為的影響， 得出了在最佳工藝條件， 即在反應(yīng)溫度160℃、 反應(yīng)時(shí)間3h、 硫酸濃度0.7mol/L和液固比6∶1時(shí)除鐵效率最高。
關(guān)鍵字: 鋁土礦； 高壓； 鐵礦； 溶解
acid solution
（School of Resources Processing and Bioengineering，
Central South University， Changsha 410083， China）
Abstract:The dissolving behavior of iron in bauxite under high temperature and high pressure in vitriol solution was studied. The results show that the Fe2O3 in bauxite can be dissolved in vitriol solution rapidly， and meanwhile the technology would not change the property of aluminum bearer in bauxite， which offers good conditions to the processing and utilization of bauxite. The effects of reaction temperature， reaction time and vitriol concentration on the dissolving rate of iron were discussed in detail. The optimum conditions are: reaction temperature 160℃， time 3h， vitriol concentration 0.78 mol·L-1， liquid solid ratio 6∶1.
Key words: bauxite； high pressure； iron； dissolution
