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Alumina extraction from coal gangue is hopeful to solve the stockpile and pollution problems of it in China. The impurities such as Fe, Ca, K and Mg in coal gangue would be dissolved in the acid leaching liquor in the process of alumina extraction using hydrochloric acid leaching, resulting in the difficulty in the separation of Aluminum. AlCl3⋅6H2O recovery from the recycled AlCl3-containing acid...
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