%A Xiaoxue SUN,Yuzhu SUN,Jianguo YU %T Leaching of aluminum from coal spoil by mechanothermal activation %0 Journal Article %D 2015 %J Front. Chem. Sci. Eng. %J Frontiers of Chemical Science and Engineering %@ 2095-0179 %R 10.1007/s11705-015-1518-2 %P 216-223 %V 9 %N 2 %U {https://journal.hep.com.cn/fcse/EN/10.1007/s11705-015-1518-2 %8 2015-07-14 %X

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.