CAJ | 학술논문

研究了从云南某高铁铝土矿中高压溶出氧化铝，考察了溶出温度、溶出时间、石灰添加量、苛性碱质量浓度对氧化铝溶出率的影响。结果表明：氧化铝溶出最佳条件为溶出温度280℃，溶出时间45 min ，石灰添加量8％，苛性碱质量浓度225 g／L ；最佳条件下，氧化铝相对溶出率为84．35％，实际溶出率为75．94％。同时，对原矿样的能谱分析和赤泥的X RD分析结果表明，氧化铝溶出过程中，赤铁矿会包裹部分一水硬铝石，导致氧化铝溶出率下降。
연구료종운남모고철려토광중고압용출양화려，고찰료용출온도、용출시간、석회첨가량、가성감질량농도대양화려용출솔적영향。결과표명：양화려용출최가조건위용출온도280℃，용출시간45 min ，석회첨가량8％，가성감질량농도225 g／L ；최가조건하，양화려상대용출솔위84．35％，실제용출솔위75．94％。동시，대원광양적능보분석화적니적X RD분석결과표명，양화려용출과정중，적철광회포과부분일수경려석，도치양화려용출솔하강。
The leaching of alumina from a high ferrous bauxite in Yunnan was investigated .The effects of several factors on leaching of alumina w ere examined .T he results show that the optimal conditions for leaching of alumina are leaching temperature of 280 ℃ ,leaching time of 45 min ,lime usage of 8% , caustic concentration of 225 g/L .T he relative leaching rate and the actual leaching rate of alumina are 84 .35% and about 75 .94% ,respectively .The results of energy spectrum analysis for the ore sample and XRD analysis for red mud show that hematite may be package a part of alumina then lead to reduce leaching rate of alumina .