Application of magnesia-carbon bricks in electric furnaces
2025-08-01
Electric arc furnace steelmaking uses an electric arc generated between graphite electrodes as a heat source. Furnaces are either DC or AC, with AC furnaces being the most common. Magnesia-carbon bricks are primarily used in the furnace lining and slag line areas.
Generally, in the actual operation of electric arc furnace steelmaking, the slag line area of the electric furnace is the weakest area. After tapping, there is usually a severe erosion groove of 100~200mm in height and about 100mm in depth in the slag line area (see Figure 1). The slag line bricks near the 2" electrode in the electric furnace lining are the most severely eroded.
The magnesia-carbon bricks produced by our company, in response to the erosion and damage of the slag line area, have been upgraded and improved based on the original magnesia-carbon bricks, effectively improving the erosion of the magnesia-carbon bricks in the slag line area of the electric furnace.
Our company's improved magnesia-carbon bricks use 100-mesh (0.15mm) flake graphite and magnesia oxide. Through scientific proportioning and the addition of Al as an additive, the bulk density of the slag line magnesia-carbon bricks is generally controlled between 3.00~3.08g/cm³, and the apparent porosity is generally controlled between 0.5~2.5%. The particle size distribution of the magnesia powder is scientifically adjusted. Magnesia-carbon bricks prepared by this method have improved erosion resistance.
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