The best extracting factor of alumina of acid leaching from coal gangue
Abstract：In order to improve the efficiency of utility using expensive component of coal gangue,wticle studied the effect of the acid leaching from the coal gangue component.This paper,orthogonal experiments of acid leaching from coal gangue to Twelfth Mining in ZHONGPING NENGHUA Group was used to obtain the best extracting factor of leaching alumina,and the effect of various factors on the extracting rate of alumina was briefly discussed.The optimal factor as follows： determined degree 0.15mm,calcination temperature 780 ℃,calcination time 2 h,hydrochloric acid 15%,liquid to solid ratio 6∶1,extraction temperature 50 ℃,extraction time 3 h.In this condition,the alumina extraction rate was 67.4%.
Keywords：coal gangueorthogonal experimentsaluminaextraction
Publication Date：2011-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 340-345 )