Iron Runner · Runner Edge
The trough edge (top of trough walls and guard bricks) of the cast house bears mechanical collision and high-temperature radiation, plus iron/slag splash attack. Guard-brick wear and loosening are common trough repair issues, directly affecting casting safety and efficiency.
Iron/slag splash attack: iron and slag splash onto guard-brick surfaces during casting, attacking the bricks at high temperature. Mechanical collision: taphole drills, mud guns, deslagging tools and hoisting equipment collide with and wear guard bricks. Thermal shock: the tap—no-tap cycle subjects guard bricks to temperature swings, cracking them. Structural loosening: loose connections between guard bricks and trough widen joints; bricks fall under collision.
After wear and loosening, trough sealing degrades and iron splash/overflow risk rises; guard-brick fall-out hurts casting efficiency, and frequent repair raises cast-house workload and refractory consumption.
Select edge guard bricks for "wear resistance + thermal-shock resistance + collision resistance":
Masonry control: firmly lay guard bricks with the trough, joints ≤2mm and full mortar. Armor installation: mount armor securely in coordination with the bricks. Bake-out: follow the curve to avoid residual moisture in bricks and mortar.
Standardize cast-house operations to reduce edge impact; inspect guard-brick wear and loosening regularly and replace on anomalies. At maintenance, check the brick-trough junction and assess overall edge condition to extend trough life.
Silicon carbide brick (SiC≥85%, refractoriness ≥1900℃, CCS≥120MPa) offers high thermal conductivity, extreme wear resistance, thermal-shock resistance and molten-salt resistance—preferred for waste incineration and hot abrasion duties.
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Al₂O₃-SiC-C composite brick for hot metal ladle, torpedo ladle and iron ladle working lining; excellent slag erosion resistance, thermal shock resistance and scouring resistance – recommended choice for slag line
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High-alumina brick LZ-65 (Al₂O₃≥65%, refractoriness ≥1790℃) has a higher corundum/mullite phase ratio for stronger slag resistance, higher temperature rating and better hot load-bearing capacity.
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