Degassing Box Lining Maintenance

Method core: Regular inspection, timely cleaning and targeted repair to avoid lining erosion and peeling.

Proper maintenance of degassing box linings (typically made of non-wetting fused silica, calcium silicate, or high-alumina refractory material) is essential to maximize component lifespan, prevent melt contamination, and maintain thermal efficiency.

Degassing Box Lining Maintenance :

Preheat Above 700℃: Always preheat thoroughly before adding metal to avoid thermal shock cracking or moisture explosions.

Clean Hot & Gentle: Scrape off floating dross while the box is warm using rounded tools—never hammer or chisel the walls.

Drain Completely: Fully drain all aluminum after every run so solidifying metal doesn't crack the lining.

Brush Boron Nitride (BN): Coat interior walls regularly with BN spray/paint to stop metal sticking and penetration.

Patch Big Cracks Fast: Hairline cracks ($<1\text{ mm}$) can just be coated over, but cracks larger than $2\text{ mm}$ must be cleaned, filled with refractory patch paste, and fully dried before reuse.

Storage protection：If idle for a long time, keep the degassing box dry and ventilated. Prevent moisture absorption of refractory lining. Cover it properly to avoid dust and rain.