Frontiers of Chemical Science and Engineering >
Leaching of aluminum from coal spoil by mechanothermal activation
Received date: 11 Mar 2015
Accepted date: 15 May 2015
Published date: 14 Jul 2015
Copyright
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.
Key words: coal spoil; mechanothermal compound activation; leaching
Xiaoxue SUN , Yuzhu SUN , Jianguo YU . Leaching of aluminum from coal spoil by mechanothermal activation[J]. Frontiers of Chemical Science and Engineering, 2015 , 9(2) : 216 -223 . DOI: 10.1007/s11705-015-1518-2
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