Improvement of Methods of Fused Periclase Crystal Size Determination

D. R. Melnikova, L. M. Akselrod, I. G. Maryasev, A. A. Platonov

Magnezit Group Ltd., 119180 Moscow/Russia


Volume 6, Issue 4, Pages 66 - 72


A novel objective method of digital analysis for microscopic examination of structural elements of fused periclase was developed. Main parameters are presented, which show the difference of the newly suggested method of investigation from the usual linear one, in which the examination is done with the help of chords. For comparison There are given results of measurements (done with the tools of the old and the new method) of fused periclase crystal size, produced by Magnezit Group and by other manufacturers. Testing of fused periclase containing more than 97,5 % MgO and various ratio of CaO/SiO2 in periclasecarbon refractories has not found influence of this parameter on the strength of refractories in steel-teeming ladles.


periclase, microscopy


[1] Riepl, K.; Barthel, H.: Large crystal magnesia clinker for advanced refractories, an update and overview. UNITECR 1991, 97–101 [2] Mosser, J.; Riepl, K.: Method of determining the periclase crystal size of sintered magnesia. cfi/Ber. DKG (1988) 212–216 [3] Steinwender, W.; Bugajski, J.: Periclase crystal size – importance, determination, propagation. UNITECR 1991, 91–97 [4] Sivash, V.G.; Perepelizin, V.A.; Mityushov, N.A.: Fused periclase. Yekaterinburg: Ural Worker, 2001, 578 [5] Saltykov, S.A.: Stereometrical Metallography. Moscow. Metallurgy (1976) 270


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