During normal smelting, the furnace lining is in direct contact with high-temperature molten steel and molten slag, and the working conditions are very bad.
The reasons for the damage to the furnace lining are:
(1) Thermal spalling and chemical attack at high temperature caused by the radiation of the arc.
(2) The scouring effect of molten slag, molten steel and furnace gas on the furnace lining.
(3) Chemical erosion of the furnace lining by the molten slag.
(4) Peeling caused by temperature changes.
(5) Spalling caused by the decomposition of the mineral composition of the lining brick itself.
(6) Mechanical impact and scouring of the furnace lining when adding scrap steel and adding molten iron.
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