Crude steel production begins with the reduction process, where the iron ore reacts with carbon sources inside the blast furnace. The blast furnace requires different types of refractory products with resistance to thermo-mechanical and thermo-chemical reactions.

Tuyere belts typically experience severe abrasion, high heat load, thermal shock and severe corrosion by molten iron, slag and intense alkali and zinc attacks.

Tuyere Belt Products

Silicon Carbide and Alumina

Tuyere belts typically experience severe abrasion, high heat load, thermal shock and severe corrosion by molten iron, slag and intense alkali and zinc attacks.

Saint-Gobain Performance Ceramics & Refractories’ engineered tuyere surroundings can meet these challenges.

A unique range of refractory materials is available, including:

Si₃N₄ (Refrax^® 20 SBF) and SiAlON (Sicanit^® TB) preassembled bricks
Preformed no and low cement castables (Monoguard^® and Monocoral^®)

Tuyere Belt Solution Comparison
Materials Solutions

Products	Zn and Akali Attack Resistance	CO attack Resistance	Dimension Stability	Oxidation Resistance
Monocoral (Al₂O₃)	Good	Class A	Good	Untouched
Monoguard (Al₂O₃- SiC)	Excellent	Class A	Very good	Untouched
Refrax 20 SBF (SiC - Si₃N₄)	Excellent	Class A	Excellent	Very good
Sicanit AL3 (SiC - SiAlON)	Excellent	Class A	Excellent	Excellent
Other Philosphy:
Graphite	Fair	Depends on impurities	Excellent	Poor

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
Tuyere belt	MonoCoral High Alumina Precast Ultra-Low Cement Corundum Big Block Mortar 336	MonoGuard High Alumina Precast no cement big block Increased Iron and Slag resistance, high strength and stability Max. recommended temperature: 1800 °C Mortar 336	Sicanit TB Silicon Carbide Base Sialon Bond Brick assembly Mortar SiC P
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
Ceramic Pad	MS4F High Alumina Iron resistant and stable Mortar Coral, Mortar 336