摘要
首钢1号高炉在风温1140℃、富氧率0．6％的条件下,将煤比由124．6kg／t提高到149．1 kg／t。煤比提高过程中高炉产生了一系列变化:边缘煤气流发展,中心煤气流不足;高炉操作惯性大,热滞后时间长;风口理论燃烧温度降低;煤气利用率下降;灰比升高。通过分析,找到了提高煤比的限制因素:原料、富氧率、风温和煤种。如果能充分挖掘潜力,1号高炉煤比可以达到170kg／t。
Under the condition of 1 140℃ blast air temperature and 0.6% oxygen enrichment ratio, the pulverized coal injection ratio of No. 1 blast furnace in Shougang is increased from 124.6 kg/t to 149.1 kg/t. The blast furnace experiences a series of change during the increasing of pulverized coal injection ratio ： development of edge gas flow; insufficient of central gas flow; higher inertia of BF operation; longer thermo lag; lower theoretical combustion temperature at tuyere; lower availability of gas; higher dust ratio. The analysis reveals many restriction factors which affect the increase of pulverized coal injection ratio： raw materials, oxygen enrichment ratio, blasting air temperature, coal grade, etc.. The pulverized coal injection ratio can go up to 170 kg/t by fully bringing out the latent potentialities.
出处
《炼铁》
北大核心
2007年第1期13-16,共4页
Ironmaking
关键词
大型高炉
分析
煤比
large size blast furnace PCI ratio analysis
