The blast furnace is the core ironmaking unit; linings face 1100–1500°C heat, slag/metal attack and alkali damage, with long campaigns relying on hearth ceramic cups and bosh cooling staves.
Problem-by-problem analysis with solutions and recommended refractories
Gunning material is applied by wet or dry gunning without formwork for fast placement. Al₂O₃≥60%, rebound ≤10%, 1500℃ max service. Enables hot-state on-line repair with minimal downtime for boiler walls, cyclone erosion zones, cement kiln hoods and preheater linings.
Learn More →
Brown corundum castable based on dense fused alumina with Al₂O₃≥85%, 1750℃ max service and CCS≥90MPa. High hardness, refractoriness and excellent slag resistance. Used in steel ladle working linings and slag lines, main iron runners, converter mouth areas and CFB boiler cyclone wear zones.
Learn More →
Anhydrous taphole mud is made of corundum, silicon carbide and coke fines with resin binder for blast furnace taphole sealing. It sinters fast, plugs densely and resists molten iron and slag scouring, ideal for large and medium blast furnaces under high pressure.
Learn More →
Iron runner castable purpose-built for blast furnace troughs with Al₂O₃≥65%, SiC+C≥15% and 1550℃ max service. Resists continuous erosion by hot iron and slag. For main trough working linings, branch runners, swing spouts, slag runners and trough covers—the core refractory of the cast house.
Learn More →
BF taphole ramming mix is applied by semi-dry ramming without formwork, Al₂O₃≥70%, 1600℃ max service. Layered ramming gives density and enables rapid hot repair.
Learn More →The hot metal ladle transports and holds molten iron; its bottom suffers impact and its slag line suffers slag attack, making it one of the most frequently relined refractory zones.
View Problems & Solutions →The hot blast stove preheats blast air to 1150–1300°C via checker bricks; checker service life and hot-blast main lining integrity determine achievable wind temperatures.
View Problems & Solutions →The iron runner guides blast-furnace hot metal to ladles; its slag line endures alternating metal/slag scouring, with Al2O3-SiC-C castable throughput being the key metric.
View Problems & Solutions →
WeChat · 17513376789