有害元素对红钢3号高炉炉缸侵蚀的影响

近年红钢3号高炉(1 350m3)的有害元素负荷升高。为了确定炉缸侵蚀速度与有害元素入炉量的关系,应用热传导微分方程,建立了炉缸炉底二维传热模型,利用Matlab软件计算得到近2年1 150℃的炉缸侵蚀线分布。结果表明:红钢3号高炉炉底侵蚀速度从50mm/a上升至60mm/a,炉缸侧壁侵蚀速度由35mm/a上升至40mm/a,对比同期有害元素入炉情况,侵蚀速度随有害元素负荷升高而有所加快,但无明显象脚状侵蚀。

Influence of harmful elements on hearth erosion of No. 3 blast furnace in Honghe Iron and Steel Co. , Ltd.

In recent years the harmful elements load of No. 3 blast furnace（1 350 m3 ）in Honghe Iron and Steel Co., Ltd. has been increasing. In order to determine the correlation between hearth erosion rate and harmful elements in the blast furnace, a two-dimensional heat-transfer model of hearth and bottom was established using heat transfer differential equation. The hearth erosion line distribution of 1 150 ℃during the last two years was obtained by using Matlab software to calculate. The results showed that the erosion rate of bottom of No. 3 blast furnace in Honghe Iron and Steel Co. ,Ltd increased from 50 mm/a to 60 mm/a. The erosion rate of hearth wall increased from 35 mm/a to 40 mm/a. With the increase of harmful element load, the erosion rate became quicker, but there was no elephant-foot erosion observed.In recent years the harmful elements load of No. 3 blast furnace（1 350 m3 ）in Honghe Iron and Steel Co., Ltd. has been increasing. In order to determine the correlation between hearth erosion rate and harmful elements in the blast furnace, a two-dimensional heat-transfer model of hearth and bottom was established using heat transfer differential equation. The hearth erosion line distribution of 1 150 ℃during the last two years was obtained by using Matlab software to calculate. The results showed that the erosion rate of bottom of No. 3 blast furnace in Honghe Iron and Steel Co. ,Ltd increased from 50 mm/a to 60 mm/a. The erosion rate of hearth wall increased from 35 mm/a to 40 mm/a. With the increase of harmful element load, the erosion rate became quicker, but there was no elephant-foot erosion observed.