柳钢4号高炉侧壁温度升高与侵蚀状态分析

Analysis of temperature rise and erosion state on sidewall of No.4 BF in Liusteel

为了进一步明确柳钢4号高炉炉缸侧壁温度升高原因和炉缸侵蚀状态,通过对柳钢4号高炉炉缸结构设计、原燃料质量和生产参数进行调研分析,结合炉缸侧壁温度的变化规律和炭砖残厚的计算,分析了炉缸侧壁温度升高原因及侵蚀状态。结果表明,4号高炉炉缸冷却能力和炉缸侧壁温度监测仍有待加强;除侧壁炭砖侵蚀外,原燃料质量波动和冶炼强度增大等也是炉缸侧壁温度上升的重要原因;炉缸侵蚀最为严重的部位在铁口中心线以下1.9m的位置,表现为＂象脚＂侵蚀。

In order to further clarify the causes of the temperature increase of sidewall of the No.4 BF and the erosion state of the hearth,based on the investigations and analyses of No.4 blast furnace hearth structural design,the quality of raw material and production parameters,combined with the change rule of sidewall temperature and the calculation of residual thickness of the carbon bricks,the causes of the temperature rise and the erosion state of the sidewall in the hearth were analyzed.The results showed that the cooling capacity of the hearth of the No.4 blast furnace and the monitoring of the side wall temperature in the hearth still needed to be strengthened.Besides the erosion of the sidewall carbon bricks,the fluctuations in the quality of the original fuel and the increase of smelting intensity were also the important reasons for the temperature rise of the sidewall in the hearth.The most serious part of the hearth erosion was 1.9 mbelow the central line of the taphole,which presented the typical ＂ elephant foot＂ erosion.