燃料化学学报（中英文）2026，Vol.54Issue(8)：266-276,11.DOI:10.1016/S1872-5813(26)60686-X
煤矸石与玉米秸秆共燃协同活化制备片状氧化铝的工艺研究
Synthesis of plate-like alumina via synergistic activation from the co-combustion ash of coal gangue and corn stalk
摘要
Abstract
This study reports a streamlined route for synthesizing plate-like α-Al2O3 via co-combustion activation of coal gangue and corn stalk,enabling the high-value utilization of solid wastes.The results demonstrate that the introduction of corn stalk significantly reduces the apparent activation energy of coal gangue combustion and increases the acid leaching yield of aluminum to 81.9％.Mechanism analysis reveals that titanium and iron ions in the co-combustion ash leachate act as natural morphology regulators,facilitating the formation of a plate-like structure in the alumina product,with titanium exhibiting leaching behavior consistent with that of aluminum.Furthermore,it is found that a high content of AlO6 structural units in the precursor effectively promotes the direct conversion into dense α-Al2O3 crystals during thermal treatment,thereby enhancing the product density.Under optimized conditions(800 ℃,1 h),the as-prepared α-Al2O3 exhibits a plate-like morphology,with a median particle size(d50)of 5.70 μm and a density of 4.94 g/cm3.This work provides a new approach for the synergistic resource utilization of coal gangue and biomass waste.关键词
煤矸石/共燃烧/氧化铝/离子溶出率/活化能Key words
coal gangue/co-combustion/alumina/ion leaching yield/activation energy分类
能源科技引用本文复制引用
苗恒洋,王志青,刘哲语,路军,房倚天..煤矸石与玉米秸秆共燃协同活化制备片状氧化铝的工艺研究[J].燃料化学学报（中英文）,2026,54(8):266-276,11.基金项目
Supported by National Natural Science Foundation of China(22378410),Shandong Provincial Natural Science Foundation(ZR2025QC1312). （22378410）
