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The formation of minerals in a chromite-periclase refractory produced from fused materials and its wear in the roof of an open-hearth furnace

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Conclusions

An analysis was carried out of certain aspects of the zone-forming process in the roof brick of open-hearth furnaces.

It was established that three fissure zones develop in the refractory in service, viz., on the boundary between the intermediate and least changed zones, in the intermediate zone, and on the boundary of the working zone with the reaction crust. The causes of the formation of the fissures are elucidated.

The refractory is destroyed mainly by spalling and, to a lesser extent, by the sweating of the exposed surface.

The structural properties of the original fused periclase-chromite material are not good, the explanation being the large amount of silicate film on the boundaries of the periclase grains and the intracrystalline inclusions of silicates.

To increase the durability of chromite-magnesite roof refractories, their structure must be so modified that they contain at least 50% direct intergranular bonds and that their porosity pattern produces a minimum capillary effect on the silicate melt.

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Literature cited

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Authors and Affiliations

  1. Eastern Institute of Refractories, USSR

    V. A. Perepelitsyn, N. A. Mityushov, S. M. Zubakov, G. V. Kononenko, G. A. Nechistykh, K. V. Simonov, G. A. Shubin, G. I. Kuznetsov & G. G. Chugunnikov

  2. Institute of Metallurgy and Beneficiation of the Academy of Sciences of the Kazakh SSR, USSR

    V. A. Perepelitsyn, N. A. Mityushov, S. M. Zubakov, G. V. Kononenko, G. A. Nechistykh, K. V. Simonov, G. A. Shubin, G. I. Kuznetsov & G. G. Chugunnikov

  3. V. I. Lenin Metallurgical Combine, Magnitogorsk

    V. A. Perepelitsyn, N. A. Mityushov, S. M. Zubakov, G. V. Kononenko, G. A. Nechistykh, K. V. Simonov, G. A. Shubin, G. I. Kuznetsov & G. G. Chugunnikov

Authors
  1. V. A. Perepelitsyn
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  2. N. A. Mityushov
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  3. S. M. Zubakov
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  4. G. V. Kononenko
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  5. G. A. Nechistykh
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  6. K. V. Simonov
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  7. G. A. Shubin
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  8. G. I. Kuznetsov
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  9. G. G. Chugunnikov
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Additional information

Deceased.

Translated from Ogneupory, No. 12, pp. 35–40, December, 1975.

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Perepelitsyn, V.A., Mityushov, N.A., Zubakov, S.M. et al. The formation of minerals in a chromite-periclase refractory produced from fused materials and its wear in the roof of an open-hearth furnace. Refractories 16, 766–772 (1975). https://doi.org/10.1007/BF01280626

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  • DOI: https://doi.org/10.1007/BF01280626

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