Furnaces are constructed using a combination of materials designed to withstand high temperatures, provide thermal insulation, and ensure structural integrity. Key materials include vacuum-formed high-purity alumina fiber for heat preservation, 304 stainless steel for the outer shell and structural components, and lightweight refractory bricks for insulation. Additionally, SiC heating rods are used for heating elements, and Q235 low-carbon steel is employed for corrosion-resistant and heat-insulating outer shells. These materials work together to ensure the furnace's durability, efficiency, and safety.
Key Points Explained:
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Vacuum-Formed High-Purity Alumina Fiber:
- Function: Provides excellent heat preservation and can withstand extremely high temperatures.
- Application: Used as insulation material within the furnace to minimize heat loss and improve energy efficiency.
- Advantages: High thermal stability, lightweight, and excellent insulating properties.
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304 Stainless Steel:
- Function: Forms the structural framework of the furnace, including the outer shell, inner and outer tubes, and flanges.
- Application: Used for the vertical shell, which is mirror-polished for aesthetic and functional purposes. Also used for various holes and ports (electrode, suction, vent, thermocouple, infrared, and observation holes).
- Advantages: High corrosion resistance, durability, and ability to maintain structural integrity under high temperatures.
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Lightweight Refractory Bricks:
- Function: Provides additional insulation and thermal resistance.
- Application: Used in conjunction with alumina fiber to enhance the furnace's insulation capabilities.
- Advantages: Lightweight, high thermal resistance, and long-lasting performance.
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Silicon Carbide (SiC) Heating Rods:
- Function: Acts as the primary heating element within the furnace.
- Application: Vertically installed within the furnace to ensure even heat distribution.
- Advantages: High thermal conductivity, resistance to oxidation, and ability to operate at very high temperatures.
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Q235 Low-Carbon Steel:
- Function: Used for the outer shell of the furnace, providing corrosion resistance and structural support.
- Application: Constructs the solid double-layer metal frame combined with a heat-insulating fan structure to ensure a low surface temperature.
- Advantages: Corrosion-resistant, electrostatic-resistant surface, and effective heat insulation.
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Welded Structural Components:
- Function: Ensures the furnace's structural integrity and airtightness.
- Application: Inner and outer tubes, along with front and rear flanges, are welded into a single unit to prevent heat leakage and maintain pressure.
- Advantages: Enhanced durability, reduced heat loss, and improved safety.
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Specialized Holes and Ports:
- Function: Facilitates various operational and monitoring functions within the furnace.
- Application: Includes electrode holes for electrical connections, suction and vent holes for airflow control, thermocouple holes for temperature monitoring, infrared holes for thermal imaging, and observation holes for visual inspection.
- Advantages: Enables precise control and monitoring of the furnace's internal environment, ensuring optimal performance and safety.
By combining these materials, the furnace achieves a balance of thermal efficiency, structural durability, and operational safety, making it suitable for high-temperature applications in various industries.
Summary Table:
| Material | Function | Application | Advantages |
|---|---|---|---|
| Vacuum-Formed Alumina Fiber | Heat preservation, withstands high temps | Insulation material to minimize heat loss | High thermal stability, lightweight, excellent insulation |
| 304 Stainless Steel | Structural framework, corrosion resistance | Outer shell, inner/outer tubes, flanges, and specialized holes | High durability, corrosion resistance, maintains integrity at high temps |
| Lightweight Refractory Bricks | Additional insulation, thermal resistance | Enhances insulation with alumina fiber | Lightweight, high thermal resistance, long-lasting |
| SiC Heating Rods | Primary heating element | Vertically installed for even heat distribution | High thermal conductivity, oxidation resistance, operates at high temps |
| Q235 Low-Carbon Steel | Corrosion-resistant outer shell | Double-layer metal frame with heat-insulating fan structure | Corrosion-resistant, electrostatic-resistant, effective heat insulation |
| Welded Structural Components | Ensures structural integrity and airtightness | Inner/outer tubes and flanges welded to prevent heat leakage | Enhanced durability, reduced heat loss, improved safety |
| Specialized Holes and Ports | Facilitates operational and monitoring | Electrode, suction, vent, thermocouple, infrared, and observation holes | Enables precise control and monitoring of internal environment |
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