General Areas Served
Crude steel production begins with the reduction process, whereby iron ore reacts with carbon sources inside the blast furnace. It is imperative that refractory products used inside the blast furnace are resistant to these thermomechanical and thermochemical reactions.
Saint-Gobain Performance Ceramics & Refractories designs, engineers and supplies a comprehensive range of high quality refractory products and solutions, specifically developed for blast furnaces.
An extensive range of refractories ideal for use downstream of the blast furnace is also available, including:
- High quality tap hole mixes, customized to meet customer requirements
- Concretes with excellent performance characteristics, ideal for troughs and runners
- Alumina silicon carbide carbon bricks for torpedo ladles
Saint-Gobain Performance Ceramics & Refractories is also focused on developing materials for the evolving needs of DRI (Direct Reduced Iron) processes. Refractory requirements increase in line with H2 usage.
Saint-Gobain Performance Ceramics & Refractories’ extensive experience in related industries (for example, pure H2 atmosphere) makes it uniquely suited to providing optimal solutions to meet this challenge.
Saint-Gobain Performance Ceramics & Refractories is currently working to become carbon neutral by 2050 – a goal shared across much of the ironmaking industry.
Solution By Application
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Blast Furnace Repairs
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, tap holes, hearth walls and pads.
Saint-Gobain Performance Ceramics & Refractories offers a number of castable and shotcrete solutions, ideal for various furnace areas:
- Sialfrax™ 18 Cast (colloidal silica bonded) for reprofiling and tap hole repairs in the hearth.
- Sialfrax™ 30 Shot for bosh repairs.
- Sialfrax™ 18 Shot for lower stack repairs.
- Alfrax® 60 Shot for middle to upper stack repairs.
Conventional coke and charcoal blast furnace require specific types of refractories to ensure smooth operation.
Saint-Gobain Performance Ceramics & Refractories provides a comprehensive range of products for conventional coke and charcoal blast furnace, many of which can be customized according to customers’ requirements and operating conditions.
Products for Blast Furnace Repair
|Area||Main wear mechanism||Suitable Product|
|1st option||2nd option|
|Hearth||Molten Iron/Slag Erosion||Sialfrax™ 18 Shot+
Sialfrax™ 18 Cast+
|Sialfrax™ 18 Shot
Sialfrax™ 18 Cast
|Bosh||Abrasion / Strong Alkali Attack||Sialfrax™ 30 Shot+||Sialfrax™ 30 Shot|
|Lower Stack||Abrasion / Strong Alkali Attack||Sialfrax™ 18 Shot+||Sialfrax™ 18 Shot|
|Middle and Upper Stack||Abrasion at < 1,000°C||Alfrax® 60 Shot||Sialfrax™ 18 Shot|
|Throat and Upper Cone||Abrasion at < 1,000°C||Alfrax® 60 Shot|
What are the benefits of utilizing colloidal silica materials in the lower stack, belly and bosh?
Sialfrax™ 18 Shot demonstrates high mechanical strength at high temperature, while its SiC content ensures high alkali and abrasion resistance.
What is the benefit of performing regular hearth repairs?
Regular repairs will not mitigate the eventual need for a complete blast furnace reline, but these will help to reduce downtime and extend the period before the blast furnace requires fully relining.
Which cement is suitable for use in the upper and middle stack?
The low cement Alfrax® 60 Shot shotcrete provides high strength and high erosion resistance in low to medium temperature applications under 1,000°C.
Ironmaking Blast Furnace Repair Products
Saint-Gobain Performance Ceramics & Refractories offers a number of castable and shotcrete solutions, ideal for various furnace areas
Ironmaking Ceramic Cup Savings
Coranit AL extends hearth wall life by approximately 10 years, our latest development is expected to increase hearth wall life by a further 2 to 3 years.