某高铁铝土矿石铝铁分离试验
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摘要
大量高铁铝土矿因氧化铁含量高、矿物嵌布关系复杂而处于待开发状态。为确定四川某高铁铝土矿的高效开发利用方案,对还原焙烧—弱磁选提铁—铝溶出的铝铁高效分离回收工艺中主要影响因素——焙烧制度、焙烧产物磨矿细度及弱磁选磁场强度进行了单因素条件试验。结果表明,在还原焙烧试样粒度为0.18~0 mm、配碳系数为2.0、焙烧温度为1 350℃、焙烧时间为20 min、焙烧产物磨矿细度为-0.074 mm占91%、弱磁选磁场强度为60kA/m情况下,可取得铁品位为89.83%、铁回收率为84.08%的金属铁粉,Al2O3浸出率为69.35%,较好地实现了铝、铁分离。
Due to high iron oxide content and complex mineral disseminated conditions,a large number of high-Fe bauxite is to be developed. To determine the high efficient development and utilization of a high-Fe bauxite ore in Sichuan,main factors in the high efficient aluminum and iron separation process of reduction roasting-iron enrichment by low intensity magnetic separation-aluminum dissolution were tested,including roasting system,grinding fineness of calcined product and field intensity of low intensity magnetic separation as single variable factor. The results showed that under conditions of the particle size of reduction roasting sample 0. 18 ~ 0 mm,a carbon coefficient of 2. 0,calcined at 1 350 ℃,roasting for 20 min,grinding fineness of calcined product 91%- 0. 074 mm,and magnetic field strength of low-intensity magnetic separation 60 kA /m,the metal iron powder with Fe grade of 89. 83%,Fe recovery of 84. 08% was obtained,and the leaching rate of Al2O3reached69. 35%,which preferably achieved the separation of aluminum and iron.
Due to high iron oxide content and complex mineral disseminated conditions,a large number of high-Fe bauxite is to be developed. To determine the high efficient development and utilization of a high-Fe bauxite ore in Sichuan,main factors in the high efficient aluminum and iron separation process of reduction roasting-iron enrichment by low intensity magnetic separation-aluminum dissolution were tested,including roasting system,grinding fineness of calcined product and field intensity of low intensity magnetic separation as single variable factor. The results showed that under conditions of the particle size of reduction roasting sample 0. 18 ~ 0 mm,a carbon coefficient of 2. 0,calcined at 1 350 ℃,roasting for 20 min,grinding fineness of calcined product 91%- 0. 074 mm,and magnetic field strength of low-intensity magnetic separation 60 kA /m,the metal iron powder with Fe grade of 89. 83%,Fe recovery of 84. 08% was obtained,and the leaching rate of Al2O3reached69. 35%,which preferably achieved the separation of aluminum and iron.
引文
[1]朱忠平,黄柱成,姜涛,等.高铁三水铝石型铝土矿的焙烧特性[J].中国有色金属学报,2007(8):1360-1366.Zhu Zhongping,Huang Zhucheng,Jiang Tao,et al.Sintering properties of high iron gibbsite-type bauxite ores[J].The Chinese Journal of Nonferrous Metals,2007(8):1360-1366.
[2]Bhima R R.Novel approach for the beneficiation of ferruginous bauxite by microwave[J].Minerals and Metallurgical Processing,1996,13(3):103-106.
[3]袁致涛,张松,李丽匣,等.我国高铁铝土矿铝铁分离技术现状[J].金属矿山,2013(9):100-103.Yuan Zhitao,Zhang Song,Li Lixia,et al.Research status on ferrous and aluminum separation of high-Fe bauxite in China[J].Metal Mine,2013(9):100-103.
[4]逯军正,于先进,张丽鹏.从赤泥中回收铁的研究现状[J].山东冶金,2007,29(4):10-12.Lu Junzheng,Yu Xianjin,Zhang Lipeng.Development condition of recovering iron from red mud[J].Shandong Metallurgy,2007,29(4):10-12.
[5]薛群虎,陈延伟.拜耳法高铁赤泥回收铁的试验研究[J].矿物岩石,2011(12):6-12.Xue Qunhu,Chen Yanwei.Experimental study of iron recovering from high iron contained red mud by Bayer process[J].Journal of Mineralogy and Petrology,2011(12):6-12.
[6]于站良,陈家辉,谢刚,等.加压浸出脱除工业硅中杂质铝的研究[J].稀有金属,2013,37(3):453-460.Yu Zhanliang,Chen Jiahui,Xie Gang,et al.Aluminum removal from metallurgical grade silicon with pressure leaching[J].Chinese Journal of Rare Metals,2013,37(3):453-460.
[7]唐晓宁,甘霖,刘冬艳,等.赤泥还原焙烧脱铁试验研究[J].湿法冶金,2012,31(5):312-315.Tang Xiaoning,Gan Lin,Liu Dongyan,et al.Experiment study on removal of iron from red mud by reduction roasting[J].Hydrometallurgy of China,2012,31(5):312-315.
[8]卢毅屏,丁明辉,冯其明,等.山西某铝土矿提铝降铁试验研究[J].金属矿山,2012(1):100-103.Lu Yiping,Ding Minghui,Feng Qiming,et al.Aluminum increasing and iron reduction research on Shanxi a bauxite[J].Metal Mine,2012(1):100-103.
[9]胡文韬,王化军,孙传尧,等.高铁铝土矿直接还原过程中Na2CO3的损失机制[J].金属矿山,2012(1):104-107.Hu Wentao,Wang Huajun,Sun Chuanyao,et al.Mechanism of Na2CO3loss in the direct-reduction system of ferric bauxite[J].Metal Mine,2012(1):104-107.
[10]毕诗文,于海燕.氧化铝生产工艺[M].北京:化学工业出版社,2006.Bi Shiwen,Yu Haiyan.Alumina Production Process[M].Beijing:Chemical Industry Press,2006.
[11]肖玮,刘卫,张念炳,等.中等品位铝土矿石灰烧结法提铝试验研究[J].贵州工业大学学报,2008,37(5):41-43.Xiao Wei,Liu Wei,Zhang Nianbing,et al.Study on the process of extracting alumina from the middling grade bauxite using lime sinter[J].Journal of Guizhou University of Technology,2008,37(5):41-43.
[12]魏党生.高铁铝土矿综合利用工艺研究[J].有色金属,2008(6):14-18.Wei Dangsheng.Study on all-around utilization of high iron-aluminium ore[J].Nonferrous Metals,2008(6):14-18.
[13]高文义.吉林临江羚羊铁矿石分选基础研究[D].沈阳:东北大学,2010.Gao Wenyi.Fundamental Research on Separation of Jilin Linjiang Lingyang Iron Ore[D].Shenyang:Northeastern University,2010.
[2]Bhima R R.Novel approach for the beneficiation of ferruginous bauxite by microwave[J].Minerals and Metallurgical Processing,1996,13(3):103-106.
[3]袁致涛,张松,李丽匣,等.我国高铁铝土矿铝铁分离技术现状[J].金属矿山,2013(9):100-103.Yuan Zhitao,Zhang Song,Li Lixia,et al.Research status on ferrous and aluminum separation of high-Fe bauxite in China[J].Metal Mine,2013(9):100-103.
[4]逯军正,于先进,张丽鹏.从赤泥中回收铁的研究现状[J].山东冶金,2007,29(4):10-12.Lu Junzheng,Yu Xianjin,Zhang Lipeng.Development condition of recovering iron from red mud[J].Shandong Metallurgy,2007,29(4):10-12.
[5]薛群虎,陈延伟.拜耳法高铁赤泥回收铁的试验研究[J].矿物岩石,2011(12):6-12.Xue Qunhu,Chen Yanwei.Experimental study of iron recovering from high iron contained red mud by Bayer process[J].Journal of Mineralogy and Petrology,2011(12):6-12.
[6]于站良,陈家辉,谢刚,等.加压浸出脱除工业硅中杂质铝的研究[J].稀有金属,2013,37(3):453-460.Yu Zhanliang,Chen Jiahui,Xie Gang,et al.Aluminum removal from metallurgical grade silicon with pressure leaching[J].Chinese Journal of Rare Metals,2013,37(3):453-460.
[7]唐晓宁,甘霖,刘冬艳,等.赤泥还原焙烧脱铁试验研究[J].湿法冶金,2012,31(5):312-315.Tang Xiaoning,Gan Lin,Liu Dongyan,et al.Experiment study on removal of iron from red mud by reduction roasting[J].Hydrometallurgy of China,2012,31(5):312-315.
[8]卢毅屏,丁明辉,冯其明,等.山西某铝土矿提铝降铁试验研究[J].金属矿山,2012(1):100-103.Lu Yiping,Ding Minghui,Feng Qiming,et al.Aluminum increasing and iron reduction research on Shanxi a bauxite[J].Metal Mine,2012(1):100-103.
[9]胡文韬,王化军,孙传尧,等.高铁铝土矿直接还原过程中Na2CO3的损失机制[J].金属矿山,2012(1):104-107.Hu Wentao,Wang Huajun,Sun Chuanyao,et al.Mechanism of Na2CO3loss in the direct-reduction system of ferric bauxite[J].Metal Mine,2012(1):104-107.
[10]毕诗文,于海燕.氧化铝生产工艺[M].北京:化学工业出版社,2006.Bi Shiwen,Yu Haiyan.Alumina Production Process[M].Beijing:Chemical Industry Press,2006.
[11]肖玮,刘卫,张念炳,等.中等品位铝土矿石灰烧结法提铝试验研究[J].贵州工业大学学报,2008,37(5):41-43.Xiao Wei,Liu Wei,Zhang Nianbing,et al.Study on the process of extracting alumina from the middling grade bauxite using lime sinter[J].Journal of Guizhou University of Technology,2008,37(5):41-43.
[12]魏党生.高铁铝土矿综合利用工艺研究[J].有色金属,2008(6):14-18.Wei Dangsheng.Study on all-around utilization of high iron-aluminium ore[J].Nonferrous Metals,2008(6):14-18.
[13]高文义.吉林临江羚羊铁矿石分选基础研究[D].沈阳:东北大学,2010.Gao Wenyi.Fundamental Research on Separation of Jilin Linjiang Lingyang Iron Ore[D].Shenyang:Northeastern University,2010.