Application range of magnesia carbon bricks

Magnesia carbon bricks are made of magnesia, dead-burned magnesia, fused magnesia, high-purity magnesia, high-quality graphite and bauxite additives. The performance of alumina magnesia carbon bricks has a great relationship with the graphite content in the bricks. As the graphite content increases, the strength of the brick decreases, the thermal expansion rate decreases, and the residual expansion rate increases.

Refractory MgO-C bricks are very suitable for the requirements of steel smeltin. This kind of brick has the characteristics of high fire resistance, high corrosion resistance, excellent heat resistance, high temperature spalling stability, high thermal shock resistance, etc. It has been rapidly popularized and applied. Using carbon materials that are difficult to be wetted by slag, molten steel, and the high refractory properties of magnesia, high slag resistance and solubility, and low high-temperature creep, MgO-C (magnesia carbon) bricks are used in severely corroded slag lines and products. Steel mouth and other parts. So far, due to the massive use of magnesia carbon bricks in the steelmaking process and the improvement of the steel smelting process, huge economic benefits have been created.

The graphite content in the brick should be controlled at about 20%. Magnesia carbon bricks have low wettability to slag and are suitable for the slag line part of the ladle, especially for the occasion of continuous pouring of multiple furnaces. In order to meet the needs of producing clean steel, the application site of magnesia carbon bricks has expanded from the slag line to the side wall during refining in the ladle.

In ladle, the chemical composition of slag is complex and changeable, and the temperature changes violently and frequently. Ladle magnesia carbon brick with excellent performance is often used in the slag line of ladle.

EAF magnesia carbon brick is mainly used for lining and tapping hole of medium frequency electric furnace steelmaking oxidation converter, hot spot of high power electric furnace wall, lining of external refining furnace, slag line of steel ladle, etc.