摘要
炉缸内铁液环流对炉缸内衬的侵蚀有重要影响,而导致铁液环流的主要因素则是死焦柱的存在。为此,根据炉缸内实际尺寸,运用质量和动量守恒方程来模拟计算,研究了不同死焦柱类型和位置的高炉炉缸剪应力的变化;由于铁液环流对炉缸的侧壁以及炉缸侧壁与炉底交界部位的冲刷作用较强,因此在炉缸侧壁和炉底位置修砌一道环形档坝,观察其对炉底剪应力的影响。结果表明,炉底出铁口近端受到的剪应力较大,而在出铁口远端炉底剪切应力最小;死焦柱浮起时,炉底剪应力减小;焦炭自由区越大,炉底剪应力越小;增加档坝可以有效的减轻炉底受到的剪应力,炉底剪应力越大,增加档坝后减轻的炉底受到的剪应力值越大。
The circuiting flow of hot metal has an important effect on the erosion of the hearth, which is brought mainly by dead-man in hearth. Based on conservation equations of mass and momentum, in an actual plant size hearth, the wall shear stress at various operating conditions was determined. The effect of different coke-bed shape and position on the wall shear stress of the hearth was studied. Because the erodent effect of circuiting flow on the sidewall of hearth and the junction of the hearth sidewall and the hearth bottom increasing, adding a gear dam on the sidewall lining under the taphole, and adding another gear dam on the bottom lining, then the influence of the dam on the wall shear in the blast furnace hearth when build a ring gear dam in hearth sidewall and bottom was analyzed. The results show that, the wall shear stress is higher at the positon of the hearth taphole, the wall shear stress is slower at the position away from the hearth taphole; the sitting position deadman cause higher wall shear stress than the floating position. Increasing the coke free zone area, the wall shear stress in the hearth bottom decreases; Adding the dam can effectively reduce the hearth bottom wall shear stress, the greater the wall shear stress of hearth bottom, the more sharply the wall shear stress of hearth bottom decreases after adding the gear dam.
出处
《铸造技术》
CAS
北大核心
2014年第2期351-354,共4页
Foundry Technology
关键词
档坝
炉缸
剪应力
死铁层
dam
hearth
wall shear stress
salamander
