【摘要】 以宝钢新建4号高炉炉衬结构为原型,以多类边界条件处理边界传热问题,建立了炉衬结构三维温度场数学模型.基于该模型,分析了炉衬温度场分布,讨论了炉内渣皮形成与脱落的温度条件和冷却热负荷对炉衬温度场的影响.结果表明,在炉身中下部和炉腹、炉腰部位炉衬内表面到冷却板前端的100mm范围内是炉衬耐材易损区和渣皮形成区;在1300~1450℃炉气温度范围内易于形成稳定的渣皮层,而1450℃以上区域渣皮的形成与稳定取决于该部位的冷却负荷;保证铜冷却板长期使用的最低水流量需不小于6t/h.更多还原

【Abstract】 A three-dimensional mathematical model of temperature field is developed for the Baosteel new No.4 blast furnace lining,to which various boundary conditions are given to express relevant heat transfer processes. The model is used to analyze the temperature field distribution on the furnace lining and discuss the influences of the temperatures at which the slag skull forms and comes off in furnace and the thermal load due to cooling on the temperature field of furnace lining. The results show that the vulnerable zone of lining refractory and formation zone of slag skull are in a 100 mm range on lining’s inner surface from the middle/lower part of furnace stack and bosh to the front-end of cooling plate .And a stable slag skull layer is easy to form when the furnace gas temperature is between 1300℃ and 1450℃,while the temperature is over 1450℃ the formation and stability of slag skull depend on the thermal load due to cooling in the range. To ensure the service life of copper cooling plate as long as possible,the minimum cooling water flow rate should be kept not less than 6t/h.更多还原