2007 Volume 1 Issue 11
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Cheng Fangqin, Cui Li, Zhang Hong, Zhang Juncai, Fan Shimin. Study on aluminum oxide extracted from coal gangue[J]. Chinese Journal of Environmental Engineering, 2007, 1(11): 99-103.
Citation: Cheng Fangqin, Cui Li, Zhang Hong, Zhang Juncai, Fan Shimin. Study on aluminum oxide extracted from coal gangue[J]. Chinese Journal of Environmental Engineering, 2007, 1(11): 99-103.
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Study on aluminum oxide extracted from coal gangue

  • 1.

    Center of Environmental Science and Engineering,Shanxi University,Taiyuan 030006

  • 2.

    Technical Center of Lu′an Mining Industry（Group）Co.Ltd., Changzhi 046204

  • Accepted Date: 06/01/2007
    Fund Project:
  • Coal gangue, which contains about 25% of Al2O3, is a main solid waste of coal industry, but it is also a useful resource. Orthogonal experiment was used to find the the optimum technical condition of acid lixiviating Al2O3 from coal gangue, which was taken from Lu′an Coal Mining Company, Shanxi Province. The experimental results show that: the optimum technical conditions are that calcine temperature is 650℃, quantity of 20% hydrochloric acid is 225 mL(about six times by mol of Al2O3 contained in coal gangue) per 100 grams coal gangue, ratio of solid to liquid is 1∶3, and reaction time is 3 hours. Result of single-factor affecting experiment is in accord with orthogonal experiment. Aluminum leaching rate is 71.49% under the optimum conditions. This study has great significance on utilization of coal gangue resources of Shanxi Province.
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    沈阳化工大学材料科学与工程学院 沈阳 110142

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Study on aluminum oxide extracted from coal gangue

  • Accepted Date: 06/01/2007
Fund Project:

Abstract: Coal gangue, which contains about 25% of Al2O3, is a main solid waste of coal industry, but it is also a useful resource. Orthogonal experiment was used to find the the optimum technical condition of acid lixiviating Al2O3 from coal gangue, which was taken from Lu′an Coal Mining Company, Shanxi Province. The experimental results show that: the optimum technical conditions are that calcine temperature is 650℃, quantity of 20% hydrochloric acid is 225 mL(about six times by mol of Al2O3 contained in coal gangue) per 100 grams coal gangue, ratio of solid to liquid is 1∶3, and reaction time is 3 hours. Result of single-factor affecting experiment is in accord with orthogonal experiment. Aluminum leaching rate is 71.49% under the optimum conditions. This study has great significance on utilization of coal gangue resources of Shanxi Province.

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