High coal ratio is a target of ironmaking in future and the role of oxygen enrichment in high coal ratio has been proved in theory and practice.
提高煤比是今后我国炼铁的重要任务。富氧对提高煤比的作用在理论和实践中都得到证实。
The change of blast furnace indices with the oxygen enrichment and PCI were obtained by a mathematical-simulation, which indicates that the replacement ratio will decrease with increasing of PCI rate.
通过数学模型获得了富氧喷煤高炉参数的变化，计算结果表明，随着喷煤量的增加，置换比将会降低。
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