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Blast Furnace Repair Solutions
Solutions to extend Blast Furnace life-time
With blast furnace service lives typically extending to 20 years or more, it is essential that effective intermediate refractory repairs are performed to address advancing wear in areas such as the stack, tuyere, tap holes, hearth walls and pad.
Saint-Gobain Performance Ceramics & Refractories offers castable solution, ideal for hearth wall, tap hole, tuyere and bosh repairs:
Sialfrax™ 18 Cast (colloidal silica bonded) for reprofiling and tap hole repairs in the hearth.
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Low rebound loss
High corrosion resistance
High erosion resistance -
Products for Blast Furnace Repair
Area Main wear mechanism Suitable Product Hearth Molten Iron/Slag Erosion Sialfrax™ 18 Shot+
Sialfrax™ 18 Cast+Lower Stack Abrasion / Strong Alkali Attack Sialfrax™ 18 Shot+ Middle and Upper Stack Abrasion at < 1,000°C Sialfrax™ 18 Shot+ -
FAQ
Sialfrax™ 18 Cast demonstrates high mechanical strength at high temperature, while its SiC content ensures high alkali and abrasion resistance.
While regular hearth repairs will not eliminate the eventual need for a full blast furnace reline, they offer significant operational benefits. These include:
- Minimizing Unplanned Downtime: Timely repairs help prevent unexpected failures that could lead to costly production interruptions.
- Extending Campaign Life: By addressing localized wear and damage, repairs can prolong the interval between full relines.
- Improving Safety and Reliability: Maintaining the integrity of the hearth reduces the risk of critical failures and enhances overall furnace stability.
- Cost Efficiency: Smaller, scheduled interventions are generally more economical than emergency shutdowns or premature relining.
In short, regular hearth maintenance is a strategic approach to maximizing furnace uptime and optimizing lifecycle costs.
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