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Global Geology 2014, 17(3) 182-188 DOI:
ISSN: 1673-9736 CN: 22-1371/P |
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Study on extracting alumina from fly ash by compound additive activation method |
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WANG Yongwang |
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Shenhua Zhungeer Energy ��esources Comprehensive Development Co����Ltd����Xuejiawan 010300��Inner Mongolia��China |
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Abstract��
According to the chemical and mineral composition characteristics of the fly ash��alumina can be ex- tracted from fly ash through the calcining method by using sodium carbonate and calcium carbonate additives�� The effects on leaching rate of alumina have been investigated�� The results showed that the fly ash can be acti- vated effectively and the leaching rate of alumina can be improved to more than 92% through this method�� The best process parameters were the ratio of raw materials��i�� e�� the material weight ratio of fly ash��calcium car- bonate and sodium carbonate was 1�� 0��1�� 2��0�� 9�� The activating temperature was 850��- 900�棬activating time was 3 h�� This process has a potential application prospect and improves the value of comprehensive utilization of fly ash�� |
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Keywords��
fly ash
compound additive activation method
extract
alumina
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Received Revised Online: |
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