Magnesia Carbon Brick

Magnesia-carbon brick is a high-performance refractory material made from high-purity magnesium oxide and natural flake graphite as core components, supplemented with special binders and additives. It possesses outstanding characteristics such as high temperature resistance, resistance to alkaline slag corrosion, thermal shock stability, and low high-temperature creep.  Produced through precise proportioning, high-pressure molding, and low-temperature heat treatment, it is primarily used in critical lining parts of metallurgical equipment such as steelmaking converters, electric furnaces, and refining furnaces, serving as a core refractory material to ensure the stable and efficient operation of high-temperature smelting processes.

一.Characteristics of Magnesia-carbon brick

It exhibits excellent overall performance and demonstrates stable and reliable characteristics under high-temperature conditions;

Outstanding slag resistance: Carbon material itself is difficult to be wetted by slag and molten steel, and when combined with high-refractory alkaline magnesia, the dual effect effectively resists slag erosion;

Excellent thermal shock resistance: Graphite has a thermal conductivity of up to 229 W/m·k at 1000℃, far exceeding that of MgO at 24.08 W/m·k at the same temperature.  Furthermore, the mechanical strength of graphite increases with increasing temperature, effectively mitigating thermal stress caused by sudden temperature changes; It has a low creep rate in high-temperature environments, maintaining structural stability over the long term and resisting deformation.

二.Application of Magnesia-carbon brick

1.Converter Furnace Lining: As a core refractory material for steelmaking converter furnace linings, magnesia-carbon bricks are particularly suitable for demanding operating conditions such as the slag line. With their excellent slag erosion resistance and thermal shock stability, they can significantly extend the overall service life of the converter and ensure continuous and efficient operation of the smelting process.

2. Electric Arc Furnace Lining: In critical parts of the electric arc furnace, such as the furnace wall, bottom, and roof, magnesia-carbon bricks play a crucial refractory role. Their excellent high-temperature resistance and resistance to mechanical stress effectively withstand high-temperature impacts and structural loads during the smelting process, ensuring stable equipment operation.

3. Ladle Lining: Magnesia-carbon bricks are widely used in ladle linings, especially in core processes such as steel pouring. They strongly resist the dual erosion of molten steel and slag, reducing lining wear, ensuring the safety and service life of the ladle, and lowering production and maintenance costs.

4. External Refining Equipment: For high-temperature external refining equipment such as refining furnaces and molten iron ladles, magnesia-carbon bricks, with their excellent high-temperature resistance and slag erosion resistance, can adapt to demanding refining conditions, effectively improving equipment operating efficiency and extending service life, contributing to improved quality and efficiency in the refining process.

5. Blast Furnace Taphole: In blast furnace taphole applications, magnesia-carbon bricks can easily withstand the strong scouring and chemical erosion of high-temperature molten iron, significantly reducing the wear rate of the taphole, extending its service life, and reducing the frequency of maintenance shutdowns.

6. Other High-Temperature Industrial Equipment: In addition to the metallurgical field, magnesia-carbon bricks can also be widely used in other high-temperature industrial equipment such as cement kilns and glass kilns.  With their stable refractory performance, they are an indispensable key refractory lining material for such equipment.