双枪喷煤时直吹管内煤粉燃烧的研究  

Research on Pulverized Coal Combustion in Blowpipe With Double Coal Lances

作　　者：秦雪刚[1] 张宗旺[1] 侯星慧[1] 董博旭 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083

出　　处：《中国冶金》2014年第2期1-8,18,共9页China Metallurgy

摘　　要：高炉直吹管内煤粉燃烧是在有限空间内进行的,煤粉的燃烧受到限制。为了促进直吹管内煤粉的燃烧,通过二维模型研究了不同的煤粉性能和高炉操作条件对双枪喷煤时直吹管内煤粉燃烧率的影响。结果表明。煤粉的粒度越小,煤粉的燃烬率越高;煤粉的挥发分质量分数越高、热风的氧气质量分数越高,煤粉的燃烬率也越高。较高的热风温度有利于煤粉的燃烧.但当热风温度提高到1 200℃以上时,继续提高热风温度对煤粉燃烬率的影响较小。此外,还对直吹管内挥发分、温度以及各种气体成分的分布情况进行了对比分析,以便更好地理解上述操作条件对煤粉燃烧的影响。The combustion of pulverized coal in blast furnace blowpipes is carried out within a limited space,and is restricted.In order to promote the combustion of pulverized coal in the blowpipe,a two-dimensional model is used to study the effects of coal properties and blast conditions on coal burnout in blast furnace blowpipe.The results confirm that notable improvements in final burnout can be achieved for coal with smaller particles size.Higher volatile matter and higher oxygen enrichment can also improve the final burnout.High blast temperature can increase coal burnout,but the further increase in blast temperature over 1200 ’C has little effect on final burnout.In addition,the volatile,temperature and gas composition distribution are also compared,in order to better understand the impact of the operating conditions of the combustion of pulverized coal.

关 键 词：双煤枪 直吹管 粉煤喷吹 数值模拟 

分 类 号：TF538.63[冶金工程—钢铁冶金]