Abstract
As a result of chemical and petrographic investigations of periclase and corundum plates and collectors, tested in sliding gates of steel-teeming ladles, the authors have established the disintegration mechanism of refractories and given a comparative estimate of their wear. The different zone-formation characters, chemical-mineralogical, and structural changes of the working zones of the refractories indicate that periclase plates are more durable than corundum ones during teeming of metal with a high temperature (more than 1600°C) from large ladles, and also when the gate is in the closed position for the least possible time. Corundum plates exhibit negligibly small wear during teeming of metal with a lower temperature (1580–1590°C) from ladles holding no more than 140 tons.
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