Crude steel production begins with the reduction process, whereby iron ore reacts with carbon sources inside the blast furnace. It is imperative that...
Upper and Lower Stack Products
The upper stack is typically the lowest temperature area of the blast furnace, with abrasion via solid burden being the primary mode of wear.
The SiC 85P (silicate bonded SiC) material offers a cost-effective lining solution for the upper stack, with MS2R and MS6 alumina-based (Al2O3) products also offering viable options.
Si3N4 (Refrax® 20 SBF) and SiAlON (Sicanit® AL3) bonded materials are an ideal choice where there is a likelihood of abrasion via solid burden, alkali and zinc attack, molten iron and slag corrosion, and thermal fluctuations.
Saint-Gobain Performance Ceramics & Refractories’ shotcrete materials are also a suitable option for stack lining: Sialfrax 18 for the lower stack and Alfrax 60 Shot for the middle and upper stack.
| Blast Furnace Area | Materials Solutions | |||
| Upper stack | Refrax 20 SBF Nitride bonded Silicon Carbide Mortar SiC P / Carbofrax 8S |
Carbofrax 8S Silicon Carbide Base Mortar SiC P |
MS2R High Alumina |
MS6 High Alumina Mortar Coral, Mortar, 336 |
| Lower stack | Refrax 20 SBF Nitride bonded Silicon Carbide Mortar SiC P / Carbofrax 8S |
Carbofrax 8S Silicon Carbide Base Mortar SiC P |
MS2R High Alumina Mortar Coral, Mortar AL 100 S or FP, 336 |
Sicanit Al3 Silicon Carbide Base Sialon Bond Improved alkali and oxydation resistance Mortar SiC P / Carbofrax 8S |
| Bosh and Belly | Refrax 20 SBF Nitride bonded Silicon Carbide Mortar SiC P / Carbofrax 8S |
Sicanit Al3 Silicon Carbide Base Sialon Bond Improved alkali and oxydation resistance Mortar Sic P / Carbofrax 8S |
Coranit 3S High Alumina Corundum Sialon bond Low thermal conductivity Mortar 336 |
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| Tuyere belt |
MonoCoral
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MonoGuard High Alumina Precast no cement big block Increased Iron and Slag resistance, high strength and stability Max. recommended temperature: 1,800 °C Mortar 336 |
Sicanit TB Silicon Carbide Base Sialon Bond Brick assembly Mortar SiC P |
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| Hearth | Coranit AL High Alumina Corundum Sialon bond Iron/Slag Corrosion resistant, good Abrasion and Alkali Corrosion Resistance Mortar 337 |
Coranit SlagR High Alumina Corundum Sialon bond 3rd generation Improved Mechanical Stability; better Slag & Iron and excellent Abrasion Resisitance Mortar 337 |
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| Ceramic Pad | MS4F High Alumina Iron resistant and stable Mortar Coral, Mortar 336 |
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| Shotcrete Solutions | Monolithic Repair Solutions | ||
| Middle/Upper stack | SHOTCRETE | ALFRAX 60 SHOT Low cement 60% Alumina High Strength, Hight abrasion resistance High adhesion, low rebound loss |
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| Lower stack | SIALFRAX 18 SHOT Sol-gel Alumina - Silicon Carbide - Carbon based High adhesion, low rebound loss High alkali and abrasion resistance |
SIALFRAX 18 SHOT+ Sol-gel Alumina - Silicon Carbide - Carbon based High adhesion, low rebound loss, high alkali resistance Excellent strength and excellent abrasion resistance |
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| Bosh | SIALFRAX 30 SHOT Sol-gel Alumina - Silicon Carbide - Carbon based High adhesion, low rebond loss, very high akali resistance High abrasion resistance |
SIALFRAX 30 SHOT+ Sol-gel Alumina - Silicon Carbide - Carbon based High adhesion, low rebound loss, very high alkali resistance Excellent strenght and excellent abrasion resistance |
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