EAF lining corrosion reason and requirement for EAF lining bricks

Source: | Author:ChangXing Refractory | Published time: 1582 days ago | 908 Views | Share:

What are the reasons for the corrosion of the EAF lining during normal use?

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 of the furnace lining are:

(1) Thermal spalling and high temperature chemical corrosion caused by arc radiation.

(2) The scouring effect of molten slag, molten steel and furnace gas on the furnace lining.

(3) The chemical attack of molten slag on the furnace lining.

(4) Peeling caused by temperature changes.

(5) Spalling caused by the decomposition of the mineral composition of the lining brick itself.

(6) The mechanical impact and erosion of the furnace lining when adding scrap steel and mixing molten iron.

The basic requirements of EAF for magnesia carbon brick are:

(1) The thermal conductivity is low to ensure less heat loss and improve the thermal efficiency of the EAF;

(2) High thermal chemical and thermal physical corrosion resistance coefficient, which requires good volume stability;

(3) Slag resistance, peeling resistance, oxidation resistance and high compressive strength, so as to obtain low consumption and long life.