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首页> 外文会议>41th Annual Conference of Metallurgists of CIM International Symposium on New Technology Implementation Metallurgical Processes Aug 11-14, 2002 Montreal, Quebec, Canada >Interaction between steel ladle slag and refractories
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Interaction between steel ladle slag and refractories

机译：钢包渣与耐火材料之间的相互作用

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摘要

It has long been recognised that steel ladle slags and refractories are capable of interacting. It is possible to either degrade the refractories, or to generate an excess of material termed sidewall buildup. A laboratory based investigation was conducted that involved immersing test rods of ladle refractory sidewall brick into molten slags of varying compositions. The mechanism of sidewall buildup was subsequently investigated by varying the thermal regime following slag immersion, and observing the resulting microstructures. Slags high in silica exhibited a discontinuous precipitation of corundum, with an additional deposit of anorthite depending on the cooling rate following slag immersion. Slags containing large quantities of alumina were observed to form well defined bands of hibonite and calcium dialuminate, in addition to a matrix in some regions that contained spinel and calcium aluminate. Increasing lime in high alumina slags was observed to decrease the quantity of slag deposited on the test rods. The experimental results suggested that the mechanism of sidewall buildup may involve a dual stage process where dissolution of the sidewall into the bulk slag layer during casting contributes to a loss of material, and dissolution into an adhered liquid layer following casting promotes the formation of solid phases and contributes to an increase in sidewall thickness.
机译：早就认识到钢水包渣和耐火材料能够相互作用。有可能使耐火材料降解，或产生过量的侧壁堆积材料。进行了基于实验室的调查，涉及将钢包耐火侧壁砖的测试棒浸入各种组成的熔融炉渣中。随后通过改变熔渣浸入后的热态并观察所得的微观结构来研究侧壁堆积的机理。二氧化硅含量高的炉渣表现出不连续的刚玉沉淀，取决于炉渣浸入后的冷却速度，还增加了钙长石沉积。除了在某些区域中包含尖晶石和铝酸钙的基体外，还观察到含有大量氧化铝的炉渣形成了清晰界定的菱铁矿和钙铝酸盐带。观察到高铝渣中石灰的增加减少了沉积在测试棒上的炉渣的数量。实验结果表明，侧壁堆积的机理可能涉及一个双阶段过程，在铸造过程中侧壁溶解到块状渣层中会造成材料的损失，而铸造后溶解到粘附的液层中会促进固相的形成。并有助于增加侧壁厚度。

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