过程工程学报
過程工程學報
과정공정학보
The Chinese Journal of Process Engineering
2011年
2期
254-258
,共5页
李来时%吴玉胜%刘瑛瑛%翟玉春
李來時%吳玉勝%劉瑛瑛%翟玉春
리래시%오옥성%류영영%적옥춘
coal fly ash%alumina%sulfuric acid%leaching%thermodynamics%kinetics
Coarse γ-Al2O3 powder was prepared through acid leaching, solid-liquid separation, crystallizing and aluminum sulfate decomposing processes using coal fly ash and concentrated sulfuric acid as raw materials. The metallurgy level Al2O3 can be obtained by disposing coarse γ-Al2O3 powder with Bayer process. The optimum conditions of acid leaching process were determined by experiments. The extraction rate of Al2O3 can be stabilized at about 87% under these conditions. The thermodynamics and kinetics of sulfuric acid leaching process were studied with irreversible thermodynamics.
