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首页> 外文会议>International congress on the science and technology of ironmaking >Modelling in-Furnace Phenomena of Coal/Coke Combustion in a Blast Furnace: Effects of Coal Properties
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Modelling in-Furnace Phenomena of Coal/Coke Combustion in a Blast Furnace: Effects of Coal Properties

机译：高炉煤/焦炭燃烧炉内炉内现象：煤炭性能的影响

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Pulverized coal injection is widely practiced in ironmaking blast furnaces. High burnout is desired for high coal rate operation. A three-dimensional integrated mathematical model of the combustion of pulverized coal and coke is developed. The model is applied to the blowpipe-tuyere-raceway-coke bed region in a commercial blast furnace. The model is validated against the measurements in terms of coal burnout and gas composition, respectively. The results show that, the in-furnace phenomena of PCI operation can be studied numerically. The effects of coal properties are examined in terms of coal burnout and gas composition, respectively. The burnout is examined in two ways: along the tuyere axis and over the raceway surface. A coal of fine particle size or high volatile content could give an increased burnout and would affect the gas composition considerably. In addition, compared with the burnout calculated along the tuyere axis, the burnout averaged over the raceway surface is a more sensible parameter to represent the unburnt char entering the surrounding coke bed. The model offers a powerful simulator for describing the in-furnace phenomena of PCI operation in blast furnace.
机译：粉煤喷射在炼铁炉中广泛实施。高煤速率运行需要高燃料。开发了一种三维综合数学模型的煤粉和焦炭的燃烧。该模型适用于商业高炉中的吹气管 - 风口滚道斗床区。该模型分别针对煤燃料和气体组成的测量验证。结果表明，可以在数值上进行PCI操作的炉内现象。分别检查煤炭性能的影响，分别以煤燃料和气体组成来检查。燃尽以两种方式检查：沿着旅游轴和滚道表面。细粒尺寸或高挥发性含量的煤可以产生增加的倦怠，并且会显着影响气体组成。此外，与沿着风口轴计算的燃烧相比，在滚道表面上平均的燃尽是一种更明智的参数，以表示进入周围的焦炭床的Unburnt炭。该模型提供了一种强大的模拟器，用于描述高炉PCI操作的炉内现象。

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