不同料柱模式下高炉内煤气流分布的模拟  

Simulation of gas flow distribution in blast furnace under different column modes

作　　者：徐英杰 佘雪峰 李红兵 曹卫强 张计斌 薛庆国 XU Ying-jie;SHE Xue-feng;LIHong-bing;CAO Wei-qiang;ZHANG Ji-bin;XUE Qing-guo(State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing,Beijing 100083,China;Ironmaking Plant,Yuhua Steel Limited,Handan 056000,Hebei,China)

机构地区：[1]北京科技大学钢铁冶金新技术国家重点实验室,北京100083 [2]裕华钢铁有限公司炼铁厂,河北邯郸056000

出　　处：《中国冶金》2023年第3期54-61,共8页China Metallurgy

基　　金：国家自然科学基金资助项目(U1960205);钢铁冶金新技术国家重点实验室基金资助项目(41621021)。

摘　　要：高炉炼铁广泛使用高铝炉料,冶炼过程中需要控制渣成分以满足炼铁需求,这会导致渣比增加和软熔带位置改变,进而影响高炉煤气流的分布。为此,基于Flunt数值模拟手段,研究了不同料柱模式下高炉内煤气流的分布情况。结果表明,不同料柱模式主要影响软熔带附近煤气流分布,对炉身上部煤气流分布情况影响较小。倒V形软熔带的料柱模式下,随着软熔带的高度升高、厚度增加,高炉内中心处11.1 m到13.0 m高度平均煤气流速由0.76 m/s减弱到0.69 m/s,边缘处8.6 m到11.1 m高度平均煤气流速增加了0.05 m/s。W形软熔带的料柱模式下软熔带下部的煤气流速高于倒V形软熔带料柱模式下的流速。研究结果可为指导高炉大渣量冶炼提供理论依据。High-alumina charges are widely used in blast furnace smelting, and the slag composition needs to be controlled to satisfy the demand of ironmaking during the smelting process, which leads to increase in slag ratio and change in the location of the cohesive zone, and in turn affects the gas distribution in the blast furnace. Therefore, based on the Flunt numerical simulation method, the gas distribution in the blast furnace under different column modes was studied. The results show that the different column modes mainly affect gas distribution near the cohesive zone, and have less impact on gas distribution in the upper part of furnace shaft. With the increase of height and thickness of inverted V-shaped cohesive zone, the average gas velocity of 11.1 m to 13.0 m in the center of blast furnace is weakened from 0.76 m/s to 0.69 m/s, while the average gas velocity of 8.6 m to 11.1 m at the edge is increased by 0.05 m/s. The gas velocity in the lower part of cohesive zone under column modes of the W-shaped cohesive zone is higher than that under the charge column mode of the inverted V-shaped cohesive zone. The results can provide theoretical basis for guiding the smelting with large quantity of slag in blast furnace.

关 键 词：高炉 渣量 软熔带 煤气流分布 数值模拟 

分 类 号：TF54[冶金工程—钢铁冶金]