Application of Magnesia Carbon Brick

Magnesia carbon bricks are made of magnesia sand, dead-burned magnesia sand, fused magnesia sand, high-purity magnesia sand, high-quality graphite, and bauxite additives. The performance of alumina-magnesia carbon bricks is closely related to the graphite content in the bricks. With the increase in graphite content, the strength of the bricks decreases, the thermal expansion rate decreases, and the residual expansion rate increases.

Characteristics of magnesia carbon bricks

Refractory MgO-C bricks are very suitable for steel smelting requirements. This brick has the characteristics of high refractory, high corrosion resistance, excellent heat resistance, high-temperature anti-stripping stability, high thermal shock resistance, usw., and has been rapidly promoted and applied. Utilizing carbon materials that are difficult to wet by slag and molten steel, and utilizing the high refractory properties, high slag resistance and solubility, low high-temperature creep, and other characteristics of magnesia sand, MgO-C (magnesium carbon) bricks are used in slag lines and products, steel nozzles and other parts in places with severe corrosion. Due to the extensive use of magnesia carbon bricks in the steelmaking process and the improvement of steel smelting technology, huge economic benefits have been created.

Application of magnesia carbon brick

The graphite content in the brick should be controlled at about 20%. Magnesium carbon bricks have low wettability to slag and are suitable for the slag line of the ladle, especially for occasions where multiple furnaces are continuously cast. In order to meet the need to produce clean steel, the application of magnesia carbon bricks in the ladle refining process has been expanded from the slag line to the side wall.

In the ladle, the chemical composition of the slag is complex and changeable, and the temperature changes violently and frequently. The ladle slag line often uses high-performance ladle magnesia carbon bricks.

Electric furnace magnesia carbon bricks are mainly used for the lining and tapping of the medium-frequency electric furnace steelmaking oxidation converter, the hot spots of the high-power electric furnace wall, the lining of the external refining furnace, the slag line of the ladle, usw.