| 变渣皮厚度条件下铜冷却壁应力分布规律及挂渣稳定性 |
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| 作者姓名： | 李峰光 张建良 |
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| 作者单位： | 湖北汽车工业学院材料科学与工程学院,十堰442000;北京科技大学冶金与生态工程学院, 北京100083;北京科技大学冶金与生态工程学院,北京,100083 |
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| 基金项目： | 国家自然科学基金资助项目（51604103）；湖北省自然科学基金资助项目（2016CFB293）；湖北汽车工业学院博士科研启动基金资助项目（BK201607） |
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| 摘 要： | 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.
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| 关 键 词： | 冷却壁 挂渣 热-力分析 应力场 |
| 收稿时间： | 2016-09-25 |
Stress distribution law and adherent dross stability of the copper cooling stave with variable slag coating thickness |
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| Affiliation: | 1) School of Materials Science and Engineering, Hubei University of Automotive Technology, Shiyan 442002, China2) School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China |
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| Abstract: | A thermal-mechanical coupling model of a copper cooling stave with variable slag coating was founded based on thermal elastic mechanics, and the influence of the gas temperature, the cooling system, the materials of insert bricks, and the properties of the slag on the stave life and the stability of the adherent dross was analyzed from the view point of the stress distribution of the stave body and the slag-brick interface. The results show that the increase of the gas temperature linearly improves the stress of stave body and reduces the stability of the adherent dross meanwhile. The stress of the stave body and the stability of the adherent dross both decrease at first and then increase when the slag coating thickness increases, and the slag coating thickness should be controlled between 30 to 60 mm. The increase of water velocity incurs tiny growth of the stress of the stave body, while the stability of the adherent dross is enhanced. The stress of the stave body is weakly reduced with the increase of water temperature, but the stability of the adherent dross decreases heavily meanwhile. The increase of the heat conductivity of insert bricks and the decrease of the heat expansion coefficient of the slag significantly reduce the stress of the stave body and enhance the stability of the adherent dross. |
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