基于死焦堆受力模型的高炉炉缸炉底温度差异

来源期刊:中南大学学报(自然科学版)2016年第8期

论文作者:李洋龙 程树森 周生华

文章页码:2569 - 2577

关键词:高炉;炉缸炉底;死焦堆;死铁层;侵蚀

Key words:blast furnace; hearth bottom; deadman; salamander; erosion

摘    要:调研国内2座大型高炉,发现炉缸与炉底温度关系存在差异,高炉A炉缸、炉底温度变化趋势相反,而高炉B炉缸与炉底温度变化趋势一致。利用死焦堆受力平衡模型,分析国内4座高炉的死焦堆浮起状态、炉缸炉底温度或者侵蚀的差异。研究结果发现,高炉内部死焦堆浮起高度会影响炉缸侧壁、炉底温度关系,进而影响其侵蚀形貌。高炉A死焦堆浮起高度明显大于高炉B死焦堆浮起高度,导致高炉A和B炉缸、炉底温度变化关系不一致。渣液面高度和死焦堆的空隙率会影响死焦堆的浮起高度,分析不同因素导致空隙率减小时的死焦堆浮起状态。死焦堆沉坐炉底时,炉缸、炉底温度变化趋势相反;死焦堆小幅度浮起时,炉缸、炉底温度变化一致;死焦堆大幅度浮起时,炉缸、炉底温度变化趋势相反。

Abstract: The investigation of two large domestic blast furnaces showed that the relationship between hearth and bottom temperature of blast furnace is different. The change trend of hearth temperature was opposite to bottom temperature for blast furnace A. However, the variation trend of them for furnace B was the same. The floating state of deadman and hearth bottom temperature and erosion were calculated by deadman mechanical model based on four domestic blast furnaces. It is found that the floating heights of deadman will influence the relationship between hearth and bottom temperature and then affect the erosion profile of hearth bottom. The floating height of deadman of furnace A is bigger than that of furnace B so that the change trend of hearth bottom temperature between furnace A and B is different. The height of slag level and porosity of deadman have a great effect on floating height of deadman. The influence of decreased porosity on the floating of deadman caused by different factors is also analyzed. When deadman is sinking at bottom, the temperature tendency of hearth sidewall and bottom center is contrary. The change trend of hearth and bottom temperature is the same with a slight floating deadman, whereas they are opposed with a heavy floating deadman.

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