Fused corundum based corundum ramming mass

Manufactured from high-purity white corundum, premium low-iron fused magnesia and large-crystal fused magnesia, featuring excellent refractory performance. It serves as working lining for coreless induction furnaces melting stainless steel, various high-alloy steel and carbon steel. High-purity raw materials and exclusive particle gradation design form dense and uniform monolithic lining. The material boasts superior thermal shock resistance and high-temperature strength. A dense sintered layer forms on the working surface during normal operation, with a loose layer adjacent to the coil.

Technical Data (excluding sintering agent)

Al₂O₃: 84-90%

MgO: 9-15%

H₂O: ≤0.5%

SiO₂: ＜0.2%

Fe₂O₃: ＜0.2%

Bulk density: 3.0g/cm³

Particle size: ≤6mm

Max service temperature: 1750℃

Construction Method

Dry vibration or dry ramming

Sintering Procedure

Heat up to 1100℃ at 250℃ per hour, hold for 1-4 hours subject to furnace size

Further heat up to 1400℃ at 200℃ per hour, hold for 1-3 hours subject to furnace size

Raise temperature to 1680℃ at 200℃ per hour, keep constant for 1-4 hours before tapping

This corundum ramming mass is specially applied to medium frequency furnaces for melting high manganese steel, stainless steel and high-alloy steel. It is widely recognized for high temperature resistance, long service life and outstanding thermal shock resistance.