What is the definition of electric furnace magnesia carbon brick and its application range and use?

What is the definition of electric furnace magnesia carbon brick and its application range and use?

It refers to refractory products made of magnesia and graphite as raw materials for electric furnaces. Magnesia carbon bricks were used in the furnace wall for about 10 years from the industrial production in 1970. Because of its high fire resistance, high corrosion resistance, excellent heat-resistant spalling property, high temperature volume stability, and high thermal shock resistance, the brick is quickly popularized and applied. Most of the bricks in the United States, Europe, Japan, the hot spot of the electric furnace wall has replaced the original cast magnesite chrome brick, combined with magnesia chrome brick and straight arch combined with magnesia chrome brick. Usually, many types of electric furnace are used in the electric furnace. Magnesia carbon bricks, including:

(1) different carbon levels (or C/MgO ratio);

(2) the types of different carbons;

(3) different types of magnesia;

(4) Different types of bonding agents

It is used as the lining brick for electric furnace wall, especially for the high-power and ultra-high-power water-cooled electric furnace wall hotspots and slag lines and other electric furnace walls. Magnesia carbon bricks are used in the ultra-high power to the wall of the electric furnace water cooling furnace. The life span can reach more than 300 times. The electric furnace bottom also began to use magnesia carbon brick

What are the special requirements for magnesia carbon bricks for electric furnaces?

Refractory and high temperature insulation performance is good.

It is mainly used for lining and tapping of ** medium frequency electric furnace ** steelmaking oxidation converter, hot spot of high power electric furnace wall, lining of refining furnace outside furnace, slag line part of steel drum.

A refractory material containing magnesium oxide and carbon as main components. Containing 60% to 90% of magnesium oxide and 10% to 40% of carbon. It has excellent slag corrosion resistance, slag permeability, thermal shock stability and thermal conductivity. The apparent porosity is 3% to 10%. It is made of high-purity magnesia powder, carbon material (including graphite), tar pitch or resin, etc., after being mixed, molded, and then fired at about 300 °C or above 1000 °C. In order to suppress the oxidation of carbon in the brick, a metal such as aluminum, silicon, magnesium or boron nitride is often added, and the amount added is not more than 5%.