矿产保护与利用2023，Vol.43Issue(6)：27-32,6.DOI:10.13779/j.cnki.issn1001-0076.2023.06.003
碳酸钠焙烧活化—硫酸浸出提取煤矸石中氧化铝的研究
Study on Al2O3 Leaching by H2SO4 after Na2CO3 Roasting Activation of Coal Gangue
摘要
Abstract
Taking the coal gangue with high iron content in Qujing area of Yunnan Province as the research object,the coal gangue was roasted and activated by Na2CO3,and then Al2O3 was leached by H2SO4.The coal gangue was characterized by XRD and SEM,and the effects of different parameters on the leaching of Al2O3 by H2SO4 were investigated.The results showd that the leaching rate of Al2O3 from coal gangue was improved obviously by adding Na2CO3 during roasting.The optimum leaching rate of Al2O3 reached 87%under the following conditions of roasting temperature 800℃,roasting time 1 h,dosage of Na2CO3 25%,concentration of H2SO4 98%,dosage of H2SO4 25%and acid leaching time 2 h.This study provides theoretical guidance for leaching Al2O3 from coal gangue and technical support for the development and utilization of coal gangue resources.关键词
煤矸石/Na2CO3焙烧活化/H2SO4浸出/Al2O3浸出率Key words
coal gangue/Na2CO3 activation/H2SO4 leaching/Al2O3 leaching rate分类
矿业与冶金引用本文复制引用
武丹宇,庄故章,刘梅,何海洋..碳酸钠焙烧活化—硫酸浸出提取煤矸石中氧化铝的研究[J].矿产保护与利用,2023,43(6):27-32,6.
