Brief introduction of application of refractories in electric furnace
Electric furnace linings are divided into two types, acidic and alkaline. However, most electric furnaces currently use alkaline linings. Because refractories are also divided into acid and alkali, alkaline refractories are mainly composed of magnesium oxide and calcium oxide. It is magnesium brick. The characteristic of alkaline furnace lining is to have sufficient fire resistance and load softening point. This is because under the action of the arc, the inner surface temperature of different parts of the furnace lining is high, and it should have strong slag resistance. During the steelmaking process, the slag and soot penetrate into the interior of the furnace lining at high temperature, so that The refractory material is melted, and the structure delaminates, causing spalling. This is because in the steelmaking process, opening the furnace door and lifting the furnace cover will cause the temperature of the refractory material for the furnace lining to change abruptly and cause spalling and cracking, which will cause premature damage to the furnace lining. Only in this way can the temperature of the molten steel in the furnace be kept constant, saving energy and improving thermal efficiency.
In fact, alkaline refractory generally refers to refractory with magnesium oxide or magnesium oxide and calcium oxide as the main components. It has good resistance to alkaline slag and iron slag, and has higher fire resistance than clay bricks and silica bricks.