What are Common EAF Refractory Lining Materials？
EAF Refractory Lining is usually made of alkaline refractory materials, supplemented by neutral or acidic materials, and is configured differently according to the working conditions of the parts:
Magnesium carbon brick is the core material, composed of magnesium oxide (60%~90%) and graphite (10%~30%), with strong resistance to high temperature (above 1700℃), thermal shock and slag erosion, and is used in key parts such as slag line area and furnace bottom.
Magnesium calcium brick contains magnesium oxide and calcium oxide, which can purify slag and is suitable for clean steel smelting such as stainless steel, but requires moisture-proof treatment.
High alumina brick (alumina 48%~90%) is a neutral material with good thermal shock resistance and low cost. It is used in non-critical high-temperature areas such as furnace top and steel outlet.
Amorphous materials such as ramming materials and castables are used for on-site repairs or complex structural parts.
The overall trend is towards low carbonization and long life to meet the needs of environmental protection and efficient smelting.
Material Selection For Different Parts Of Electric Arc Furnace
| Location | Working conditions | Common refractory materials |
| Furnace bottom | Withstands metal liquid static pressure, mechanical erosion and thermal shock | Magnesia carbon brick, magnesium calcium brick, ramming mass |
| Slag line area | Slag erosion is the most serious and temperature fluctuations are large | High graphite content magnesia carbon bricks, magnesia calcium carbon bricks |
| Furnace wall | High temperature radiation, molten metal and slag scouring | Medium and low graphite content magnesia carbon bricks, high alumina bricks |
| Roof | High temperature gas scouring, thermal shock | High alumina bricks, silica bricks (traditional process) |
| Taphole | Molten steel flushing, rapid cooling and heating | Magnesia carbon brick, corundum or magnesium castable |
KERUI Refractory supply all kinds of EAF Refractory Lining Materials, if you have any question or needs, contact with us now:
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