为了延长转炉炉壳的寿命，降低耐火材料的消耗，进行炉体热膨胀应力的精确计算是十分必要的。
In order to prolong the longevity of BOF vessel and reduce the consumption of refractories, it is quite essential to calculate exactly thermal expansion stress for BOF body.
冷却壁是高炉重要的冷却设备，直接影响高炉炉体的使用寿命。
Cooling stave is an important equipment of blast furnace and has an effect on blast furnace life directly.
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