Choice of technological regimes of a blast furnace operation with injection of hot reducing gases
Choice of technological regimes of a blast furnace operation with injection of hot reducing gases
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DOI：
10.3989/revmetalm.2002.v38.i4.411
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发表时间：
2002-08
影响因子：
0.8
通讯作者：
A. Babich;H. Gudenau;K. Mavrommatis;C. Fröhling;A. Formoso;A. Cores;L. García
中科院分区：
文献类型：
--
作者：
A. Babich;H. Gudenau;K. Mavrommatis;C. Fröhling;A. Formoso;A. Cores;L. García
由于回旋区火焰温度的下降以及死人区和粘性区的问题，化石燃料的喷射速率受到限制。为了获得可观的焦炭节省、更好的死炉操作以及提高高炉生产率和最小化由于减少二氧化碳排放而造成的环境影响，下一步将是通过风口喷射由低品位煤气化或炉顶煤气再生产生的热还原气体（HRG）。HRG与高煤粉喷吹、喷煤率和富氧相结合的使用可以保持和提高高炉工艺的竞争力。数学模型计算表明，HRG喷吹与煤粉（PC）和富氧鼓风相结合，可使PC比提高300-400 kg/tHM，高炉利用率提高40- 50%。当注入HRG时，高炉可以在全氧鼓风（100%的工艺氧气，热风除外）下运行。
Injection rate of fossil fuels is limited because of drop in the flame temperature in the raceway and problems in the deadman region and the cohesive zone. The next step for obtaining a considerable coke saving, a better operation in the deadman as an well as increase in blast furnace productivity and minimizing the environmental impact due to a decrease in carbon dioxide emmision would be injection by tuyeres of hot reducing gases (HRG) which are produced by low grade coal gasification or top gas regenerating. Use of HRG in combination with high pulverized coal inyection PCI rate and oxigen enrichment in the blast could allow to keep and to increase the competitiveness of the blast furnace process. Calculations using a mathematical model show that the HRG injection in combination with pulverized coal (PC) and enriching blast with oxigen can provide an increase in PC rate up to 300-400 kg/tHM and a rise in the furnace productivity by 40-50 %. Blast furnace operation with full oxigen blast (100 % of process oxigen with the exception for the hot blast) is possible when HRG is injected.