磁化焙烧对高铁铝土矿中铁元素的分离回收影响
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摘要
对铝土矿进行磁化焙烧—磁选处理,考察氢气通入量,焙烧温度及焙烧时间对铁回收率和品位的影响,并研究不同焙烧条件下矿石中铁元素的分离规律。结果表明,当氢气流量为40mL/min、400℃焙烧75min后,铝土矿中铁的回收率及回收品位最优,分别为69.58%和44.59%,能较好实现铁质元素的分离和回收。该条件下焙烧磁选后的铝精矿氧化铝的实际溶出率为86.2%,比未经过焙烧磁选的铝土矿提高了6.6个百分点。
Bauxite was treated by magnetization-roasting and magnetic separation.Effects of hydrogen flow rate,roasting temperature and time on separation ratio and grade of iron concentrate were investigated.Separation of iron element under different roasting condition was studied.The results show that iron grade in iron concentrate is 44.59% with iron recovery of 69.58% under the optimum conditions including H2 flow rate of 40 mL/min and roasting at 400 ℃ for 75 min.Dissolution ratio of aluminum concentrate obtained from optimum magnetization-roasting and magnetic separation conditions is 86.2% with 6.6%higher than that of bauxite without magnetization roasting and magnetic separation.
Bauxite was treated by magnetization-roasting and magnetic separation.Effects of hydrogen flow rate,roasting temperature and time on separation ratio and grade of iron concentrate were investigated.Separation of iron element under different roasting condition was studied.The results show that iron grade in iron concentrate is 44.59% with iron recovery of 69.58% under the optimum conditions including H2 flow rate of 40 mL/min and roasting at 400 ℃ for 75 min.Dissolution ratio of aluminum concentrate obtained from optimum magnetization-roasting and magnetic separation conditions is 86.2% with 6.6%higher than that of bauxite without magnetization roasting and magnetic separation.
引文
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[18]魏国令,李军旗,陈朝轶,等.溶出条件对铝土矿氧化铝溶出及赤泥中氧化铁富集的影响[J].有色金属(冶炼部分),2017(7):26-29.
[19]张谦,文书明,王伊杰,等.高铁铝土矿铝铁分离技术现状[J].金属矿山,2017(9):138-143.
[20]李军旗,邹勇,陈朝轶,等.三水型铝土矿磁选除铁及Al2O3溶出性能研究[J].湿法冶金,2014,33(1):28-31.
[21]邹勇,李军旗,徐本军,等.高铁铝土矿磁选除铁试验研究[J].湿法冶金,2013,32(5):288-290.
[22]毕诗文,于海燕.氧化铝生产工艺[M].北京:化学工业出版社,2010:65-105.
[2]刘丕旺.谈广西平果铝土矿拜耳法赤泥的综合利用[J].轻金属,1994(7):13-16.
[3]胡文韬,王化军,孙传尧,等.高铁铝土矿直接还原—溶出工艺[J].北京科技大学学报,2012,34(5):506-511.
[4]LIU H G,CHU M S,WANG Z,et al.Study on metallized reduction and magnetic separation of iron from fine particles of high iron bauxite ore[J].High Temperature Materials and Processes,2017,36(1):78-79.
[5]ZHANG R,ZHENG S,MA S,et al.Recovery of alumina and alkali in Bayer red mud by the formation of andradite-grossular hydrogarnet in hydrothermal process[J].Journal of Hazardous Materials,2011,189:827-835.
[6]NI J W,LI Z Y,WU Y,et al.Research advance on comprehensive utilization of high iron bauxites[J].Advanced Materials Research,2013,785-786:1072-1075.
[7]DEBJYOTI RAY,SOUVIK DE,TAPAN KUMAR PARYA.Dehydration-rehydration characteristics of Gibbsitic bauxite under equilibrium condition[J].Transactions of the Indian Ceramic Society,2015,74(2):86-89.
[8]LAN Y P,LIU Q C,MENG F,et al.Optimization of magnetic separation process for iron recovery from steel slag[J].Iron and Steel Research,International,2017,24(2):165-170.
[9]赵俊学.冶金原理[M].西安:西北工业大学出版社,2012:65-77.
[10]辛海霞,吴艳,滕飞,等.高铁三水铝土矿综合利用新工艺[J].东北大学学报(自然科学版),2014,35(8):1165-1168.
[11]李光辉,刘牡丹,姜涛,等.高铝铁矿石工艺矿物学特征及铝铁分离技术[J].中南大学学报(自然科学版),2009,46(5):1165-1171.
[12]邹雪华,陈天虎,张萍,等.天然针铁矿热处理产物的结构特征[J].硅酸盐学报,2013,41(10):1442-1446.
[13]朱晓,陈天虎,颜玲,等.黄铁矿—针铁矿混合无氧焙烧产物物相演变和特性[J].硅酸盐学报,2014,42(11):1435-1440.
[14]李小斌,杨重愚,龙远志.焙烧铝土矿溶出动力学研究[J].轻金属,1986(10):10-14.
[15]杨会宾,涂赣峰,潘晓林,等.高铁三水铝石矿溶出动力学[J].有色金属(冶炼部分),2016(2):18-22.
[16]赵恒勤,杨重愚,刘航博.铝土矿预焙烧强化溶出的动力学研究[J].矿产保护与利用,1998(3):30-34.
[17]JIN J Y,LI Z Y,YAN W.Extraction of aluminum from high iron bauxite by carbothermal reductionammonium sulfate roasting[J].Applied Mechanics and Materials,2014,3425(624):3-7.
[18]魏国令,李军旗,陈朝轶,等.溶出条件对铝土矿氧化铝溶出及赤泥中氧化铁富集的影响[J].有色金属(冶炼部分),2017(7):26-29.
[19]张谦,文书明,王伊杰,等.高铁铝土矿铝铁分离技术现状[J].金属矿山,2017(9):138-143.
[20]李军旗,邹勇,陈朝轶,等.三水型铝土矿磁选除铁及Al2O3溶出性能研究[J].湿法冶金,2014,33(1):28-31.
[21]邹勇,李军旗,徐本军,等.高铁铝土矿磁选除铁试验研究[J].湿法冶金,2013,32(5):288-290.
[22]毕诗文,于海燕.氧化铝生产工艺[M].北京:化学工业出版社,2010:65-105.