| Autor: |
Sham, P., Elistratova, N., Anisimov, N., Sidorov, V., Maslennikov, A. |
| Zdroj: |
Refractories; 1991, Vol. 32 Issue 1/2, p42-44, 3p |
| Abstrakt: |
The central part of the roof in a large arc steel-melting furnace is made of periclase-chromite refractories and wears 2-3 times more rapidly than the edge. The wear rate is governed by spalling in the working surface. There is no marked effect on the roof resistance from a maximum metal temperature averaged over a campaign in the range 1678-1690°C, but the resistance is much reduced if the temperature is raised further. The limit for the roof is metal at 1745-1748°C. The temperature of 1800°C is the critical one that destroys the roof. Increasing the melting cycle time (melting, preparation, and use) reduces the resistance, as does an elevated dust level. The conditions are most favorable for the roof when the charge contains steel scrap and metallized granules. The roof wears more rapidly when the batches do not contain scrap. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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