摘要
为了探寻煤矸石燃烧后灰渣的活性并进一步扩展其应用,对不同运行条件下循环流化床锅炉灰渣进行化学成分分析。采用20%盐酸酸浸和74μm超细活化,分析锅炉运行温度即燃烧温度以及灰渣粒度对其Al_2O_3溶出行为的影响。结果表明:除尘灰和炉渣中,Al_2O_3含量达25%以上,SiO_2含量可达35%。此外,氧化铝的溶出率随着锅炉运行温度的升高而降低,当锅炉运行温度为800~900℃时,铝溶出率大于52%;锅炉运行温度高于900℃时,铝溶出率降至26%~40%。随着灰渣粒度的减小,其活性增强,Al_2O_3溶出率可由68%提高至93%左右。
In order to investigate the activity of fly ash and slag derived from the burning process of coal gangue and further extend their ap- plication, the chemical compositions of ash and slag from circulating fluidized bed boiler （CFB） was analyzed. The effect of burning tem- perature and particle size on the A1203 dissolution of ash and slag was studied by 20% hydroehloride acid （HCl） leaching and uhrafine acti- vating. The results show that the contents of A1203 and SiO2 in the ash and slag are 25% and 35% ,respectively. In addition,the dissolution of Al2 O3 decreases with the increase of burning temperature of coal gangue in CFB. The dissolution of Al2O3 exceedes 52% when the burning temperature is 800-900 ℃. While the dissolution of Al2O3 decreases to 26% -40% when the burning temperature increases up to 900 ℃. The dissolution of Al2O3 could be increased from 68% to 93% when the particle size decrease from 198 μm to 74 μm.
作者
吴海滨
薛芳斌
崔岩巍
杨凤玲
WU Haibin;XUE Fangbin;CUI Yanwei;YANG Fengling(Shanxi Rui En Ze Technology Co. , Ltd. , Taiyuan 030006, China;Institute of Resources and Environmental Engineering, Shanxi University, Taiyuan 030006, China;Changzhi City Economic Development Research Institute, Changzhi 046000, China)
出处
《洁净煤技术》
CAS
2017年第6期90-93,共4页
Clean Coal Technology
基金
山西省科技重大专项资助项目(MC2016-05)
关键词
循环流化床
灰渣
酸浸
AL2O3
溶出
circulating fluidized bed （ CFB ）
slag
acid leaching
Al2O3
dissolution
