冷却水管表面合金化球墨铸铁冷却壁的热应力和热变形

为了满足高炉长寿的需要,开发了一种具有高冷却性能的铸铁冷却壁. 利用热态实验数据确定了合金化管铸铁冷却壁温度场数值模拟的边界条件,采用ANSYS软件和热-结构耦合的方法分析炉温、渣皮和边缘接触压力对高温状态下铸铁冷却壁热应力及变形的影响,以便采取有效的措施降低铸铁冷却壁热应力,控制其变形. 根据球墨铸铁强度分析理论提出评价长寿铸铁冷却壁冷却能力的新概念--高周热负荷.

Thermal stress and thermal distortion of cast iron cooling stave with surface-alloyed cooling water pipes

In order to meet the needs of prolonging the life of a blast furnace,a cast iron cooling stave with high performance was developed.The thermal boundary condition of the cast iron cooling stave with surface-alloyed cooling water pipes for numerical simulation of temperature field was determined by the use of hot test data.The commercial software ANSYS and the heat-structure coupling method were used to analyze the influence of furnace temperature,slag crust,edge contact pressure on the thermal stress and thermal deformation of the cast iron cooling stave under high-temperature condition.Effective measures were used to reduce the thermal stress of the cooling stave and control its thermal deformation.The new concept of high cycle heat loading,which evaluates the cooling capacity of cast iron cooling staves,was presented based on the strength analysis theory of spheroidal graphite iron.