小倒角结晶器窄面铜板角部冷却结构优化

为解决某钢厂板坯小倒角结晶器高拉速生产时铸坯角部纵裂纹比例增大问题,在原型倒角分叉槽冷却结构基础上,提出不同圆孔直径和圆孔位置的1孔1槽方案。建立窄面铜板和冷却水三维传热耦合模型,并通过工业实测热电偶温度和冷却水进出口水温差进行验证,计算了优化前后不同方案的窄面铜板和冷却水温度和速度场。对比分析不同方案的铜板热面温度值大小和均匀性后发现,相比于分叉槽结构,圆孔直径D=8 mm和圆孔位置H=26 mm的1孔1槽冷却结构:弯月面铜板倒角热面温度降低幅度最大为14.4~17.6 K;螺栓截面铜板倒角热面温度降低幅度最大为10.9~12.3 K;圆孔内冷却水流速达到8.4 m/s,保证了对倒角面和倒角顶点铜板的冷却;螺栓两侧水槽冷却水流速达10.0 m/s,增强了螺栓周围铜板冷却均匀性。

高炉炉衬和冷却技术

介绍了达涅利康力斯板式冷却器炉衬和冷却概念 ,并介绍炉役期已达 16年的康力斯 IJm uiden6号高炉。在连续生产 3430万 t铁水之后 ,最近对这座高炉的炉底和炉缸区进行大修。康力斯 IJmuiden6号高炉炉腹上部区、炉腰区和炉身区的设计表现非常好 ,仅在上述部分看到轻微的侵蚀现象。达涅利康力斯在其他许多高炉上也采用同样的设计 ,达到很长的炉龄。康力斯 IJm uiden6号高炉达到这样长的炉龄 ,证明了采用具有良好传热性能的耐火材料结合板式冷却器设计 ,具有很高的可靠性。

Effect of cooling structure on thermal behavior of copper plates of slab continuous casting mold

A three-dimensional finite-element model of slab continuous casting mold was conducted to clarify the effect of cooling structure on thermal behavior of copper plates. The results show that temperature distribution of hot surface is mainly governed by cooling structure and heat-transfer conditions. For hot surface centricity, maximum surface temperature promotions are 30 ℃and 15 ℃ with thickness increments of copper plates of 5 mm and nickel layers of 1 ram, respectively. The surface temperature without nickel layers is depressed by 10 ℃ when the depth increment of water slots is 2 mm and that with nickel layers adjacent to and away from mold outlet is depressed by 7℃ and 5 ℃, respectively. The specific trend of temperature distribution of transverse sections of copper plates is nearly free of cooling structure, but temperature is changed and its law is similar to the corresponding surface temperature.

宽板连铸结晶器设计若干技术问题分析

结合国内涟源钢铁公司和伊朗穆巴拉克宽板连铸结晶器设计技术特点和工艺要求,详细提出宽板结晶器主要部件在设计过程需要优化和改进的要点,为后来宽板连铸项目的结晶器设计、优化提供更好的基础和思路。