CAJ | 학술논문

通过二维冷态物理模型对氧气高炉炉身喷吹煤气在炉内分布进行了实验研究，分别研究了炉身煤气总量、辅助风口直径以及炉身喷吹煤气量与炉身煤气总量之比对炉身喷吹煤气在炉内分布的影响。结果表明，炉身喷吹煤气量与炉身煤气总量之比对炉身喷吹煤气在炉身分布起决定性作用，而炉身煤气总量和辅助风口直径的影响较小。同时，在炉身煤气上升过程中涡流扩散效应的影响也较小。通过对根据实验数据绘制的炉身等浓度分布图进行研究发现，炉身煤气分布主要分为两个不同的区域，一个是炉身喷吹煤气主流区，另一个是从高炉下部产生的上升煤气主流区。在炉身等浓度分布图的基础上通过回归分析的方法推导出炉身喷吹水平喷吹煤气的渗透公式。此外，辅助风口被安装在炉身下部有利于铁矿石在炉身的间接还原。
통과이유랭태물리모형대양기고로로신분취매기재로내분포진행료실험연구，분별연구료로신매기총량、보조풍구직경이급로신분취매기량여로신매기총량지비대로신분취매기재로내분포적영향。결과표명，로신분취매기량여로신매기총량지비대로신분취매기재로신분포기결정성작용，이로신매기총량화보조풍구직경적영향교소。동시，재로신매기상승과정중와류확산효응적영향야교소。통과대근거실험수거회제적로신등농도분포도진행연구발현，로신매기분포주요분위량개불동적구역，일개시로신분취매기주류구，령일개시종고로하부산생적상승매기주류구。재로신등농도분포도적기출상통과회귀분석적방법추도출로신분취수평분취매기적삼투공식。차외，보조풍구피안장재로신하부유리우철광석재로신적간접환원。
The gas distribution behaviors of oxygen blast furnaces with shaft gas injection were experimentally studied using a two-directional cold model. The effects of total gas flow rate in the shaft, auxiliary tuyere diameter and location, and the ratio of injected gas flow rate to total gas flow rate in the shaft on the injected gas distribution were investigated in detail. The results show that the in-jected gas distribution in the shaft is almost dominated by the ratio of injected gas flow rate to total gas flow rate in the shaft, while the influences of total flow rate and auxiliary tuyere diameter are little. Meanwhile, the influence of radial eddy diffusion is also little in the process of gas rise in the shaft. According to isoconcentration distribution curves from experimental data, the injected gas distribution in the shaft is divided to two dissimilar zones, a main flow region of injected gas and a main flow region of upward gas. Furthermore, the penetration equation of injected gas at the injection level is deduced through the regression analysis method. In addition, the auxiliary tuyere installed in the lower part of the shaft is advantageous for iron ore indirect reduction in the shaft.