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Refractories

, Volume 13, Issue 9–10, pp 601–606 | Cite as

Processes in the formation of direct intergrain bonds in periclase-spinel refractories

  • S. M. Zubakov
  • A. L. Dyukov
Research

Conclusions

In order to obtain periclase-spinel refractories of high quality it is necessary to use chemically pure magnesite and chromite powders, and also high firing temperatures. In the high-fired periclase-spinel refractories made from these powders a quantitatively new structure is formed: the direct bonds between the crystals of periclase and chrome spinel predominate (more than 50%). The secondary spinels, fulfilling the role of bond in the grains of periclase, possess a high melting point.

In the periclase-spinel refractories containing more than 2% silica the intergrain bonds are formed as a result of the mixed solid-liquid sintering with localized crystallization of new formations of periclase and spinel from the melt. This type of process does not ensure a sufficiently high number of direct bonds between the crystals, and weakens the structure of the products by the presence of silicate interlayers.

Keywords

Crystallization Periclase Silicate Chrome Chromite 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Literature cited

  1. 1.
    S. M. Zubakov et al., Tr. Inst. Metall. i Obogashch. Akad. Nauk. KazSSR,38, 22 (1970).Google Scholar
  2. 2.
    A. S. Berezhnoi, Multicomponent Oxide Systems [in Russian], Naukova Dumka, Kiev (1970), p. 471.Google Scholar
  3. 3.
    P. P. Budnikov and K. K. Strelov, Neorganich. Materialy,4, No. 1, 104 (1968).Google Scholar
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    J. White, Refractories J.,42, No. 10, 414 (1966).Google Scholar

Copyright information

© Consultants Bureau 1973

Authors and Affiliations

  • S. M. Zubakov
    • 1
  • A. L. Dyukov
    • 1
  1. 1.Institute of Metallurgy and Beneficiation of the Academy of Sciences of the Kazakh SSRUSSR

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