ISSN:
1573-9139
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Conclusions Timings were made on 100-ton electric are furnaces during which the roofs were in the removed state. The temperature of the working surface of the removed roof was measured. It was found that to reduce the depth of cooling in the roof, affecting its resistance, it is necessary to reduce the duration of roof removal from the furnace in the period of fettling, charging, and dressing. A study was made of the deformation of the structure of periclase-chromite annular roofs during the campaign. As a result of measurements of the deformation in the structure carried out across the central axis of the roof, we established a relatively uniform deformation of symmetrically arranged sections in the structure, which confirms the more uniform distribution of stresses in the structure of the annular roof compared with sector-arch designs. A combined annular design was developed and tested, using periclase-chromite and high-alumina bricks. There was an increase in the resistance compared with the periclase-chromite roofs of 20% and a reduction in the consumption of periclase-chromite refractories of about 40%. In this connection the combined design from periclase-chromite and high-alumina bricks for high-tonnage are furnaces at the present time is one of the most effective.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01386559
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