Theoretical Research on the Effects of Oxygen Enrichment and Pulverized Coal Injection on Performance of Tuyere Raceway Zone in Blast Furnace
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摘要: 运用热力学软件FactSage,针对攀钢4号高炉,研究了富氧和喷煤的变化对高炉风口回旋区特征的影响,主要是对理论燃烧温度以及煤气成分的影响。其结果表明:在攀钢目前的冶炼条件下,4号高炉的喷煤比可以继续提高至185 kg/t,但在245 kg/t时达到极限。提高喷煤比和富氧率均可提高回旋区的温度,但喷煤比的效果会更加显著;喷煤比和富氧的变化对煤气成分影响也各不相同。Abstract: The effects of both the oxygen enrichment and pulverized coal injection(PCI) on the performance of tuyere raceway zone in 4# blast furnace of Pangang,especially on the theoretical combustion temperature and composition of the gas,have been investigated by using the thermodynamics software FactSage.The results indicate that,under current operation conditions,the PCI of the 4# blast furnace in Pangang can be increased to 185 kg/t.However,the PCI will reach the threshold at 245 kg/t.And both the oxygen enrichment and PCI can increase the temperature in raceway zone,but the effect of PCI is more significant compared with oxygen enrichment.The influences of both the oxygen enrichment and PCI on the composition of the gas are also different.
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Key words:
- blast furnace /
- coal injection /
- blast /
- FactSage
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