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首页> 外文期刊>Scandinavian Journal of Metallurgy >In-situ observation of slag penetration into MgO refractory
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In-situ observation of slag penetration into MgO refractory

机译：矿渣渗透到氧化镁耐火材料中的原位观察

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The behavior of slag penetration into MgO refractory was investigated by combining in-situ X- ray observation with microstructural analysis of the samples after penetration experiments. The following results are obtained. The slag penetrates rapidly into the refractory, reacting with MgO particles in the refractory. The slag penetrates unevenly into the refractory with uneven pore size in a route like a tree, firstly along the main route (the surface of large MgO particles), and then extending to the branch route, while evenly into the refractory with even pore size. The rate of slag penetration increases with increasing pore radius and apparent porosity of the refractory, T·Fe concentration in the slag and temperature, and with decreasing the slag basicity (C/S ratio). In the case of the Al_2O_3-bearing slag, the rate of slag penetration is less than that of Al_2O_3-free slag in the initial stage. The penetration also stops much earlier than that of the Al_2O_3-free slag, and then the penetration height remains almost constant. In the initial stage of penetration, the penetration height is proportional to the square root of penetration time. Slag penetration is deduced as stopping due to the following: (1) the melting point and viscosity of the penetrated slag increase, and the surface tension of the penetrated slag decreases with decreasing the Fe_tO concentration in the penetrated slag consumed by the reaction between Fe_tO and MgO particles; (2) in the 10 mass percent Al_2O_3-bearing slag, the pore size in the refractory is reduced by the spine formed on the pore surface by the reaction between Al_2O_3 in the penetrated slag and MgO particles in the refractory.
机译：通过结合原位X射线观察和渗透实验后样品的微观结构分析，研究了熔渣渗入MgO耐火材料的行为。得到以下结果。炉渣迅速渗透到耐火材料中，与耐火材料中的MgO颗粒反应。炉渣沿树状路径不均匀地渗透到孔径不均匀的耐火材料中，首先沿着主路径（大的MgO颗粒表面），然后延伸到分支路径，而均匀地渗透到孔径均匀的耐火材料中。渣的渗透率随着耐火材料的孔半径和表观孔隙率的增加，炉渣中T·Fe的浓度和温度的升高以及炉渣碱度（C / S比）的降低而增加。对于含Al_2O_3的炉渣，在初始阶段炉渣的渗透速率要小于不含Al_2O_3的炉渣。渗透也比不含Al_2O_3的炉渣提前得多，然后渗透高度几乎保持恒定。在渗透的初始阶段，渗透高度与渗透时间的平方根成比例。由于以下原因，可以推断出炉渣渗透停止：（1）随着Fe_tO与Fe之间的反应消耗的炉渣中Fe_tO浓度的降低，炉渣的熔点和粘度增加，炉渣的表面张力降低。 MgO颗粒; （2）在含有10质量％的Al_2O_3的炉渣中，通过渗入的炉渣中的Al_2O_3与耐火材料中的MgO颗粒之间的反应，在孔表面形成的脊降低了耐火材料的孔径。

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