贵州修文铝土矿拜耳法溶出氧化铝试验研究
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摘要
根据贵州修文铝土矿的特点,研究了用拜耳法直接高压溶出氧化铝。试验结果表明:原矿磨细至-75μm占80%以上,控制配料分子比为1.5,循环母液苛性碱质量浓度240 g/L,石灰用量为铝土矿质量的11%,在260℃下溶出60 min,氧化铝的实际溶出率为89.80%,溶出液苛性比为1.37。
According to the characteristics of bauxite from Xiuwen,Guizhou province,high pressure leaching of alumina by Bayer process was studied.The results showed that ore was ɡraind to-75 μm accounted for 80% or more,ingredient molecular ratio was controled to 1.5,concentration of caustic alkali in circulating mother liquor was of 240 g/L,lime dosage was of 11% to bauxite,temperature was of 260 ℃,and dissolution time was of 60 min,the actual dissolution of alumina reached 89.80%.
According to the characteristics of bauxite from Xiuwen,Guizhou province,high pressure leaching of alumina by Bayer process was studied.The results showed that ore was ɡraind to-75 μm accounted for 80% or more,ingredient molecular ratio was controled to 1.5,concentration of caustic alkali in circulating mother liquor was of 240 g/L,lime dosage was of 11% to bauxite,temperature was of 260 ℃,and dissolution time was of 60 min,the actual dissolution of alumina reached 89.80%.
引文
[1]毕诗文,于海燕,杨毅红,等.拜耳法生产氧化铝[M].北京:冶金工业出版社,2007:13-15.
[2]陈家庸.湿法冶金手册[M].北京:冶金工业出版社,2005:799-823.
[3]王捷.冶金行业职业教育培训规划教材氧化铝生产工艺[M].北京:冶金工业出版社,2006:18-19.
[4]李国兵.氧化铝生产中工业循环碱液选精矿溶出工艺研究[J].湿法冶金,2007,26(2):99-104.
[5]付高峰,田福泉,权昆.中低品位铝土矿石灰拜耳法溶出的研究[J].东北大学学报:自然科学版,2005,26(11):76-78.
[6]郭智峰,武晋明.浅析石灰添加量对拜耳法溶出赤泥N/S的影响[J].轻金属,2010(4):10-11.
[7]郑雪芳.铝土矿中氧化铁含量增加对石灰拜耳法氧化铝生产过程的影响[J].轻金属,2009(7):9-12.
[2]陈家庸.湿法冶金手册[M].北京:冶金工业出版社,2005:799-823.
[3]王捷.冶金行业职业教育培训规划教材氧化铝生产工艺[M].北京:冶金工业出版社,2006:18-19.
[4]李国兵.氧化铝生产中工业循环碱液选精矿溶出工艺研究[J].湿法冶金,2007,26(2):99-104.
[5]付高峰,田福泉,权昆.中低品位铝土矿石灰拜耳法溶出的研究[J].东北大学学报:自然科学版,2005,26(11):76-78.
[6]郭智峰,武晋明.浅析石灰添加量对拜耳法溶出赤泥N/S的影响[J].轻金属,2010(4):10-11.
[7]郑雪芳.铝土矿中氧化铁含量增加对石灰拜耳法氧化铝生产过程的影响[J].轻金属,2009(7):9-12.
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