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根据热弹性力学理论,建立了渣皮厚度可变的铜冷却壁热-力耦合应力场分布计算模型,从铜冷却壁本体和炉渣-镶砖界面应力分布的角度分析了煤气温度、冷却制度、镶砖材质和炉渣性质等因素对铜冷却壁寿命及挂渣稳定性的影响规律.计算结果表明:煤气温度的升高使铜冷却壁本体应力线性升高,同时挂渣稳定性减弱;铜冷却壁本体应力值及挂渣稳定性均随渣皮厚度增加而呈现先下降后上升的趋势,实际生产中渣皮厚度应维持在30~60 mm之间;冷却水流速的增大会导致铜冷却壁本体应力值小幅上升,但可使挂渣稳定性增强;冷却水温的提升可小幅降低冷却壁本体应力,但会显著降低挂渣稳定性;镶砖热导率的提升和炉渣热膨胀系数的减小均有利于降低铜冷却壁本体应力并增强挂渣稳定性.
According to thermo-elasticity theory, a computational model of thermal stress-strain coupling stress field of copper stave with variable thickness was established. Based on the stress distribution of copper stave and slag-inlay interface, the gas temperature, cooling system, The effect of brick-making material and slag properties on the life of the copper stave and the stability of the dross. The results show that: the increase of the gas temperature causes the stress of the copper stave to increase linearly and the stability of the dross is weakened; The wall body stress and the dross stability are both decreased and then increased with the increase of the thickness of the dross skin. The thickness of the dross skin should be maintained between 30 and 60 mm in actual production. The on-body stress increased slightly, but the dross stability was enhanced. The increase of cooling water temperature could reduce the stress of the cooling wall body slightly, but significantly reduce the dross stability. The improvement of thermal conductivity and the decrease of thermal expansion coefficient Both are conducive to reducing the stress of copper stave and enhancing the stability of dross.