Skip to main content

Intensity of wear and tear of magnesite-chrome refractories in open-hearth roofs


When magnesite-chrome brick wears out, the temperature gradient through the open-hearth furnace roof is increased; hence the dimensions of the spalling working part of the brick are reduced and the time interval between spalling during the run is increased.

The increased wear resistance of dense, high-fired magnesite-chrome roof refractories in service in the roofs of rocking furnaces was due to reduction in the size of the spalling working part and a longer period between spalling as a result of delayed migration of the melts and the associated rate of formation of zones in the brick.

It is possible to bring about a considerable reduction in the intensity of the wear and tear in magnesite-chrome roof refractories during service in open hearth furnaces by increasing the temperature gradient (Δt/Δδ) through the thickness of the roof, by intensive cooling of the outer surface of smooth roofs during the first half of the run, and also by using dense magnesite-chrome refractories.

This is a preview of subscription content, access via your institution.


  1. 1.

    A. Schlutter. Stahl und Eisen, 1930. No. 40, 1393.

    Google Scholar 

  2. 2.

    M. Wald, I. Fries. Hutnicke Listy, 1954, X, 9, No. 10, 594.

    Google Scholar 

  3. 3.

    B. Ya. Pines. Physical and physico-chemical processes during wear of refractories in steel melting units. ONTI, 1939.

  4. 4.

    P. L. Gruzin, S. V. Zemskiy. Plant Laboratory, 1956, No. 2.

  5. 5.

    A. Schepers, F. R. Lich. Stahl und Eisen, 1959, No. 10, 669.

    Google Scholar 

  6. 6.

    A. S. Frenkel'. Proc. NTO CHM, Vol. XII, Metallurgizdat, Moscow, 1957.

    Google Scholar 

  7. 7.

    A. S. Frenkel', K. M. Shmukler. Ogneupory, 1956, No. 8.

  8. 8.

    D. Z. Savostin. Open hearth furnaces with chromemagnesite roofs. Metallurgizdat, Moscow, 1958.

    Google Scholar 

  9. 9.

    M. A. Mikheyev. Fundamentals of heat transfer. Gosenergoizdat, 1949.

Download references

Author information



Rights and permissions

Reprints and Permissions

About this article

Cite this article

Nemets, I.I., Makovskiy, V.A. Intensity of wear and tear of magnesite-chrome refractories in open-hearth roofs. Refractories 2, 108–113 (1961).

Download citation


  • Migration
  • Furnace
  • Temperature Gradient
  • Wear Resistance
  • Outer Surface