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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...
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