攀钢4#高炉富氧大喷煤条件下喷煤极限研究
LIMIT OF INJECTED COAL RATE UNDER OXYGEN-RICH HIGH PCI RATE AT PANGANG 4#BF
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摘要: 通过对攀钢4号高炉富氧大喷煤条件下煤粉在风口回旋区内的燃烧率数学模拟研究认为：在攀钢4号高炉入炉焦比580kg/tFe，风温1050℃等生产条件下，当喷煤量超过155kg/tFe时，风中富氧率应高于2％，才能使高炉顺行；如果喷煤量超过210kg/tFe，风中富氧率即使达到10％，也将因未燃煤粉量过高，而导致高炉不顺。Abstract: Based on the mathematical model of pulverized coal combustion in raceway under oxygen-rich high PCI rate at Pangang 4#BF, when coke rate and blast temperature are 580kg/tFe and 1050℃ respectively. if injected coal rate exceeds 155kg/tFe, blast oxygen-rich rate should be over 2%, blast furnace operate smoothly. When injected coal rate exceeds 210kg/tFe, even if blast oxygen-rich rate reaches 10%, because a large amount of pulverized coal is not combusted, blast furnace can’t operate smoothly.
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Key words:
- blast furnace /
- pulverized coal injection /
- limit
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