Converter refractories from Satkinsk dolomitic magnesite

Conclusions Satkinsk dolomitic magnesite fired in a rotary kiln using a cycle employed for Styl'sk dolomite can be used to obtain sintered powder with an apparent density 3.15 g/cm³.Compared with the currently produced tarred dolomite-magnesite refractories, the tar-bonded converter refractories made on the basis of powder produced from dolomitic magnesite are characterized by higher densities, strength, and resistance to hydration.Thus, Satkinsk dolomitic magnesite which is hardly used at the present time is a promising raw material for producing converter refractories.Translated from Ogneupory, No. 8, pp. 15–20, August, 1971.     

The Use of a Multiple-Purpose Lining of the Casting Ladle in an Integrated Steel-Processing Unit at the Oskol'skii Electrical Iron and Steel Works

A report is given on the production of periclase-carbon refractories using advanced technologies and raw periclase of different quality grade at the Semilukskii Refractory Plant Joint-Stock Company (SRP JSC). Refractories available from the SRP JSC were used at the Oskol'skii Electrical Iron and Steel Works JSC (OEISW JSC) to fabricate the multiple-purpose lining for casting ladles exploited in vacuum furnaces and integrated steel-processing units. The endurance of the lining for the walls and the slag zone of the casting ladle reaches 69 heats.     

Production of Periclase-Carbon Refractories at Semiluki Refractory Plant

The technology and commercial production of periclase-carbon articles with a regular grain composition from a raw material with unstable grain size are described. A comparative study of casting, elemental, and crucible graphite as the basic carbon component has shown that the best commercial properties are provided by the use of crucible graphite. Tests of periclase-carbon refractories without metallic aluminum and with various contents of aluminum have shown the possibility of a differentiated approach to the use of the antioxidant with allowance for the specific service conditions of the lining.     

Tarred dolomite-magnesite unfired refractories for steel converters with top oxygen blow

Summary Tarred dolomite-magnesite refractories based on preserved dolomite, finely ground magnesite, coal-tar pitch and anthracite oil, are suitable for lining steel converters with top oxygen blast.For the first time in the Soviet Union unfired tarred dolomite converter refractory has been obtained with an addition of magnesite which is not inferior in service to ordinary fired brick PSh used for lining converters.It is possible to transport the bricks if they are preserved from hydration.     

Improving the Steel Ladle Lining at the Volzhskii Tube-Making Plant Joint-Stock Co.

Routes towards improving the quality of refractory lining for steel ladles and choice of the refractory product configuration are described. Periclase-carbon refractories of the mini-key format based on a composite carbon binder are shown to be the best choice for the steel ladle lining. Conditions for efficient performance (lining for the liquid-metal jet impingement zone, replacement of the nested block by a monolithic one, development of optimum block composition etc.) are discussed.     

Tar-bonded dolomite magnesite brick based on alekseev dolomite

Conclusions Raw dolomite from the Alekseev source has a relatively low silica content, and its chemical composition completely satisfies the requirements of MRTU 14-06-28-63 as a raw material for the production of unfired tarred dolomite refractories.Alekseev dolomite can be considered a well-sintered raw material for industrial use. Its firing under industrial conditions at 1700°C yields a well-sintered dense powder.During the tests of the prepared unfired tarred dolomite-magnesite products using Alekseev dolomite in a 50-ton oxygen converter, the life exceeded that obtained in converters of the same capacity at the Krivoi Rog Metallurgical Factory.The Alekseev dolomite can be used as a raw material for the production of unfired tarred dolomite refractories.Translated from Ogneupory, No.2, pp. 18–21, February, 1967.