Abstract:The position, size, porosity, renewal speed and other properties of the deadman under blast furnace tap hole play a decisive role in the flow mode of molten iron and slag in the hearth, which affecting the key issues such as hearth heat transfer, erosion of refractory materials, discharge speed of molten iron and slag. Through image processing technology, the shape, porosity, coke size and morphology distribution of the lower part of the deadman immersed in the hot metal of 1 880 m3 blast furnace in Laigang were studied. Through the analysis and calculation, the two-dimensional porosity of the lower part of the deadman immersed in hot metal is 56.73%. The average particle size of coke in this area is 15.3 mm, which reduces about 70%. From the analysis of the morphology, it is found that the coke in this area is closer to the ellipsoid shape, which shows that the consumption rate of coke in all directions is inconsistent after loading from the top of the furnace, and it has an obvious orientation. It can be concluded that in the process of slag and hot metal passing through the hearth, the degradation in horizontal and vertical direction is deep. This work is helpful for the information analysis of the "black box" of the blast furnace hearth and helps to further deepen the operators′ cognition for the working state of the deadman lower part and the hearth in the blast furnace.
梁栋, 刘元意, 王学斌, 张毅, 石红燕. 基于图像处理的高炉炉缸死铁层中焦粒信息分析[J]. 钢铁, 2020, 55(8): 169-174.
LIANG Dong, LIU Yuan-yi, WANG Xue-bin, ZHANG Yi, SHI Hong-yan. Analysis of coke particles in salamander of blast furnace hearth based on image processing technology[J]. Iron and Steel, 2020, 55(8): 169-174.
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