Leaching of aluminum from coal spoil by mechanothermal activation

Xiaoxue SUN, Yuzhu SUN, Jianguo YU

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PDF(931 KB)
Front. Chem. Sci. Eng. ›› 2015, Vol. 9 ›› Issue (2) : 216-223. DOI: 10.1007/s11705-015-1518-2
RESEARCH ARTICLE
RESEARCH ARTICLE

Leaching of aluminum from coal spoil by mechanothermal activation

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Abstract

The process of activating coal spoil (CS) in order to recover aluminum as a high value product was investigated. The CS was first characterized by X-ray fluorescence (XRF), X-ray diffraction (XRD) and thermogravimetric analysis-differential scanning calorimetry (TGA-DSC) in order to determine the chemical and mineral compositions of the CS. Then a mechanothermal activation method was adopted to increase the aluminum activity in the coal spoil. Over 95% of the aluminum in the CS could be extracted using this activation method. The mechanothermal activation process promoted the destruction of kaolinite structures and hindered the formation of amorphous γ-Al2O3. This resulted in a high aluminum leaching activity in the mechanothermally activated CS.

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Keywords

coal spoil / mechanothermal compound activation / leaching

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Xiaoxue SUN, Yuzhu SUN, Jianguo YU. Leaching of aluminum from coal spoil by mechanothermal activation. Front. Chem. Sci. Eng., 2015, 9(2): 216‒223 https://doi.org/10.1007/s11705-015-1518-2

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Acknowledgements

This work was financially supported by the National High Technology Research and Development Program of China (Grant No. 2011AA06A102), the National Natural Science Foundation of China (Grant No. 21306053), the Key Project of Scientific Research Innovation of Shanghai Municipal Education Commission (Grant No. 14ZZ063), and the Fundamental Research Fund for the Central Universities (WB1213008).

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2014 Higher Education Press and Springer-Verlag Berlin Heidelberg
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