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首页> 外文期刊>ISIJ international >A Six-phases 3-D Model to Study Simultaneous Injection of High Rates of Pulverized Coal and Charcoal into the Blast Furnace with Oxygen Enrichment
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A Six-phases 3-D Model to Study Simultaneous Injection of High Rates of Pulverized Coal and Charcoal into the Blast Furnace with Oxygen Enrichment

机译：六阶段3-D模型研究富氧高炉同时向高炉中注入高比例煤粉和木炭

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摘要

Simultaneous injection of charcoal and coal with oxygen enrichment in the blast furnace has recently received remarkable attention due to its possibility of considerable decrease in coke rate, increase in productivity and enhancement of combustion in the raceway. This paper deals with a modeling of simultaneous injection of pulverized coal and charcoal into the blast furnace through tuyeres. This model treats the blast furnace as a multi-phase reactor and six phases are considered simultaneously: gas, lump solids (raw iron ore, sinter, pellets and coke), hot metal, molten slag, pulverized charcoal and coal. Conservation equations for mass, momentum, energy and chemical species are solved simultaneously based on the finite volume method. Firstly two base cases of 200 kg/thm injection of pulverized coal and charcoal respectively are simulated and afterwards mixed injection of coal and charcoal are investigated. Simulation results for the two base cases are compared with measurements on industrial scale trials. Good agreement obtained for major operational parameters and inner temperatures verifies the model developed useful. Afterwards, the simultaneous injection operations are simulated in order to improve blast furnace performance. The simulation results contribute to better understanding of the blast furnace phenomena with combined injection and also to the development of new cleaner technologies to enhance the blast furnace operation.
机译：在高炉中同时注入富氧的木炭和煤由于其可能大大降低焦炭率，提高生产率并增强滚道的燃烧而备受关注。本文涉及一个通过风口同时将煤粉和木炭喷入高炉的模型。该模型将高炉视为一个多相反应器，同时考虑了六个相：气体，块状固体（生铁矿石，烧结矿，颗粒和焦炭），铁水，熔渣，木炭粉和煤。基于有限体积法同时求解质量，动量，能量和化学物种的守恒方程。首先模拟了两个分别以200 kg / thm的量粉煤和木炭注入的基本案例，然后研究了煤和木炭的混合注入。将两种基本情况的模拟结果与工业规模试验的测量结果进行比较。在主要操作参数和内部温度方面取得的良好一致性验证了该模型的实用性。然后，模拟同时喷射操作，以提高高炉性能。仿真结果有助于更好地理解高炉结合喷射的现象，也有助于开发新的清洁技术以增强高炉的运行。

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