不同添加剂对某铝土矿拜耳法溶出性能的研究
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摘要
对不同添加剂(铁酸二钙、氧化镁、水化铁酸钙、赤泥磁选氧化铁的水化铁酸钙)替代石灰对国内某铝土矿的拜耳法溶出性能影响进行了研究。结果表明,水化铁酸钙完全替代石灰效果最佳,当按C/S=1. 3添加时,赤泥中N/S降至0. 31,A/S降至1. 2,溶出率提升至96. 91%。根据其研究结果,优化生产工艺,为生产氧化铝的企业提供节能减排增产参考。
The effect of different additives( dicalcium ferrite,magnesium oxide,calcium ferrite hydrate,calcium ferrite hydrate with red mud magnetic iron oxide) on the dissolution properties of a domestic bauxite by Bayer process was studied. The results show that calcium ferrite hydrate is the best substitute for lime. When C/S = 1. 3,the red mud N/S decreases to 0. 31,the A/S drops to 1. 2,and the dissolution rate increases to 96. 91%. According to the results of its research,it can optimize the production process and provide a reference for the alumina production enterprises to realize energy saving and emission reducing.
The effect of different additives( dicalcium ferrite,magnesium oxide,calcium ferrite hydrate,calcium ferrite hydrate with red mud magnetic iron oxide) on the dissolution properties of a domestic bauxite by Bayer process was studied. The results show that calcium ferrite hydrate is the best substitute for lime. When C/S = 1. 3,the red mud N/S decreases to 0. 31,the A/S drops to 1. 2,and the dissolution rate increases to 96. 91%. According to the results of its research,it can optimize the production process and provide a reference for the alumina production enterprises to realize energy saving and emission reducing.
引文
[1]刘家瑞,刘祥民.应用选矿-拜耳法工艺处理-水硬铝石型中低品位铝土矿生产氧化铝的工业实践[J].轻金属,2005,4(4):12-14.
[2]马朝建,赵岗.用我国中低品位一水硬铝石矿生产氧化铝的新方法[J].轻金属,1998,12(2):7-11.
[3]陈文汨,彭秋燕,黄伟光,等.改变拜耳法预脱硅工艺降低赤泥化学结合碱的研究[J].轻金属,2010(6):9-12.
[4]李新华,顾松青,尹中林,等.添加水化铁酸钙拜耳法新工艺溶出规律及机理研究[J].有色金属(冶炼部分),2008(6):18-21.
[5]元炯亮,张懿.含钙添加剂强化一水硬铝石矿拜耳法溶出过程的作用分析[J].化工冶金,2000(1):108-112.
[6]李来时,翟玉春,刘瑛瑛,等.六方水合铁酸钙的合成及其脱硅[J].中国有色金属学报,2006,16(7):1306-1310.
[7]刘连利,翟玉春,田彦文,等.六方水合铝酸钙的合成及其脱硅[J].东北大学学报(自然科学版),2003,24(7):681-684.
[8]张伦和,许启梨,王向丽.不同添加剂对一水硬铝石型铝土矿拜耳法溶出的影响[J].轻金属,1995,7(4):9-14.
[9]赵福辉,芦东.拜耳法外排赤泥铝硅比升高原因及抑制措施的探讨[J].世界有色金属,2002(2):25-29.
[2]马朝建,赵岗.用我国中低品位一水硬铝石矿生产氧化铝的新方法[J].轻金属,1998,12(2):7-11.
[3]陈文汨,彭秋燕,黄伟光,等.改变拜耳法预脱硅工艺降低赤泥化学结合碱的研究[J].轻金属,2010(6):9-12.
[4]李新华,顾松青,尹中林,等.添加水化铁酸钙拜耳法新工艺溶出规律及机理研究[J].有色金属(冶炼部分),2008(6):18-21.
[5]元炯亮,张懿.含钙添加剂强化一水硬铝石矿拜耳法溶出过程的作用分析[J].化工冶金,2000(1):108-112.
[6]李来时,翟玉春,刘瑛瑛,等.六方水合铁酸钙的合成及其脱硅[J].中国有色金属学报,2006,16(7):1306-1310.
[7]刘连利,翟玉春,田彦文,等.六方水合铝酸钙的合成及其脱硅[J].东北大学学报(自然科学版),2003,24(7):681-684.
[8]张伦和,许启梨,王向丽.不同添加剂对一水硬铝石型铝土矿拜耳法溶出的影响[J].轻金属,1995,7(4):9-14.
[9]赵福辉,芦东.拜耳法外排赤泥铝硅比升高原因及抑制措施的探讨[J].世界有色金属,2002(2):25-29.