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首页> 外文期刊>Refractories and Industrial Ceramics >Influence of Microstructure on Formation of Deterioration Layer in Periclase-Hercynite Bricks
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Influence of Microstructure on Formation of Deterioration Layer in Periclase-Hercynite Bricks

机译：微观结构对钙镁矿-钙锰矿砖变质层形成的影响

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摘要

The microstructure of the original layer and the cement melt-penetrated layer of a used periclase-hercynite brick from a cement rotary kiln with a daily output of 5000 tons for 12 months was studied by XRD, SEM, EDS, and a mercury porosimeter. The results show that the cation diffusion between hercynite and periclase particles in the brick at high temperatures decreases the pore size of the brick. The pore size in the original layer is located mainly in the range of 4 - 20 mu m; the decreased pore size increases the penetration resistance of the cement melt to the inside of the brick and makes the cement melt react with the pore walls better. The components of the matrix pore walls such as MgO and Al2O3 dissolve in the cement melt, enhancing the hot properties of the penetrated melt, decreasing the penetration depth, and slowing the formation of the deterioration layer. The pore structure and the element distribution endow the brick with good thermal shock resistance.
机译：利用XRD，SEM，EDS和水银孔率计研究了日产5000吨水泥回转窑用过的钙镁石-半水镁石砖的原始层和水泥熔透层的微观结构。结果表明，高温下海藻石和周长石颗粒之间的阳离子扩散减小了砖的孔径。原始层中的孔径主要位于4-20微米的范围内。减小的孔尺寸增加了水泥熔体对砖内部的渗透阻力，并使水泥熔体与孔壁更好地反应。 MgO和Al2O3等基质孔隙壁的成分溶解在水泥熔体中，从而增强了渗透熔体的热性能，降低了渗透深度，并减慢了劣化层的形成。孔结构和元素分布赋予砖良好的抗热震性。

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