Experimental Study on Coal Gasification of Gas-injection BF Process
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摘要: 为克服喷吹煤粉给高炉冶炼带来的不利影响, 提出了由造气炉燃烧普通煤产生煤气, 自风口喷入高炉替代喷吹煤粉的新工艺, 研究工艺参数对煤造气质量的影响规律。结果表明, 气化剂流量增加, 煤气中CO+H2含量和煤气热值先升高后降低;CO+H2含量和煤气热值随着反应温度、料层厚度、富氧率的增加而增加。当气化剂流量1.0 m3/h、反应温度1 000℃、料层厚度1 000 mm、富氧率15%时, 煤气质量达到最佳值, CO+H2含量达到79.37%, 煤气热值达到10 229.51 kJ/m3。Abstract: The gas-injection BF process was proposed in order to overcome the adverse effects of pulverized coal injection,where the reducing gas produced by normal coal in a gasifier is injected to BF from tuyeres.The influence of process parameters on gas quality was determined. The results show that CO+H2 content and calorific value of gas first increases and then decreases with gasification agent flow increasing,while steadily increases as the reaction temperature,material thickness,oxygen enrichment rate increase.When gasifying agent flow rate is 1.0 m3/h,the reaction temperature is 1 000 ℃,the material layer thickness is 1 000 mm,oxygen enrichment rate is 15%,the best gas quality can be achieved where CO + H2 content reaches at 79.37% and LHV of gas reaches at 10 229.51 kJ/m3.
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