With Blast Furnace lifetimes extending to 20 years and beyond, it becomes increasingly important that the correct choice is made for the lining design. Short-cuts and poor choices can lead to extremely expensive unplanned stoppages. Saint-Gobain’s rich experience of over 50 years in total design capability (not only Ceramic Cup) and supply of all required products specifically developed for Blast Furnace conditions means we are a natural choice for all your lining needs.
Blast Furnace Brochure Ceramic Cup Article Technical Datasheet
In addition to the full package of requested refractory materials, Saint-Gobain engineers will supply a budget-feasibility study, basic and detailed design (including thermal studies) and installation supervision.
From a materials requirements perspective, a blast furnace refractory lining may be split into five areas from top to bottom.
Click on the picture to enlarge: | Blast Furnace Area | Main Products | ||||
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Upper Stack/ Throat In this low temperature area, abrasion by the solid burden is the primary mode of wear. Our SiC 85P, a silicate bonded SiC, has proven to be a cost-effective solution. |
SiC (Oxide Bonded Silicon Carbide) |
Al2O3 (Alumina Based) |
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SiC 85P | MS6 | Mullfrax 601 BF | ||||
Lower Stack / Belly and Bosh Abrasion by the burden, alkali and zinc attack, molten iron and slag corrosion, as well as thermal fluctuations call for Si3N4 and SiAlON bonded materials. |
SiC-Si3N4 (Nitride bonded Silicon Carbide) |
SiC-SiAlON (Sialon Bonded Silicon Carbide) |
Al2O3-SiAlON (Sialon Bonded Alumina Corundum) |
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Refrax 20 SBF | Sicanit Al3 | Coranit 3S | ||||
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Tuyere belt The tuyere surroundings experience severe abrasion, high heat load and thermal shock in combination with corrosion by molten iron and slag and intense alkali and zinc attacks. |
Low Cement High Alumina Pre-Cast Blocks |
No Cement High Alumina Pre-Cast Blocks |
SiC-SiAlON (Sialon Bonded Silicon Carbide Bricks) |
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MonoCoral | MonoGuard | Sicanit AL3 | ||||
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Hearth Traditionally, blast furnace hearths are lined with high thermal conductive carbon-based materials. |
Al2O3-SiAlON (Alumina Corundum Sialon Bond) Worldwide recognized |
Al2O3-SiAlON |
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Coranit AL | Coranit SlagR | |||||
Ceramic Pad Both MS4 and MS4R are well suited for hearth pad application being iron resistant and stable. |
Classical Mullite | Alumina Based | ||||
MS4 | MS4R |
Saint-Gobain owns a complete portfolio of high-performance tap hole mix for Blast Furnaces of any size. By selecting the finest raw materials and offering a deep understanding of the current furnace conditions, Saint-Gobain’s leading technology ensures increased tap hole lengths, long tapping time and a suitable protection of the furnace hearth.
Besides tap hole mix for regular operational conditions, Saint-Gobain also supplies unique fast sintering materials for consecutive tapping operations in small furnaces, expansive clays for furnaces blow-in and a crack filling technology for damaged tap hole mushrooms, and also special solutions to help preventing the hearth wall wear around the tap holes.
Tap Hole Clay Brochure Technical Article about Taphole Clay
Applications | Products | Characteristics | Benefits |
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Small furnaces | CL | Soft tap hole mix | Minimal splashing during casting |
Medium and Large furnaces | SR | Resistance to erosion and corosion by iron and slag | Allows stable operation |
Consecutive taps | SR Consecutive | Quick hardening | Enables safe operation when the blast furnace runs with a single taphole |
Demanding conditions | SR HP | High adhesion | Maximum protection of hearth wall |
Since 1976, Saint-Gobain provides refractories that offer ultra-high resistance against slag and molten iron corrosion, that combined with design expertise guarantee maximum availability of the blast furnaces’s through and runners. With innovation and constant technical support, Saint-Gobain’s team uses the newest technologies to bring continuous improvement on safety and performance to its customers.
Products | Characteristics | Applications & Benefits |
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Ultra low cement castable | Oxidation, erosion and corrosion restistance |
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Dry Mix Lining | Water free application |
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Shotcrete | High performance, low rebound, fast repair |
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Spinel containing castable | High resistance to FeO corosion |
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Colloidal silica castables | High performance, quick drying |
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Pre-cast blocks | Controlled environment |
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High Performance Gunning mix | High adhesion |
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Ramming mix | High workability |
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Products | Characteristics | Applications | Benefits |
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Bricks | Al2O3-SiC-C based with high Oxidation and corosion resistance | Working lining | Higher campaign, even under high desulfurization treatment or high thermal shock demanding |
Castable | Mechanical resistance | Mouth | Low need for repair |
Shotcrete | High performance | Repair | Al2O3-SiC-C based with high adhesion, minimal rebound losses and exceptional wear resistance |
Gunning mix | High strength Al2O3 or Al2O3 SiC based | Repair | Special design for hot application and fast repair |
Saint-Gobain designs and supplies for its customers the most advanced technologies with exceptional results, bringing operational stability and longer life.
Charcoal Blast furnaces require specific types of refractories for a smooth operation, and Saint-Gobain provides all of them taking into account each customer operational conditions.
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