This article's table of contents introduction:
- What is a Sintering Machine High-Temperature Centrifugal Fan?
- Key Features & Design (What makes it "High-Temp"?)
- Common Applications (Sintering Process)
- Selection Criteria & Specifications
- Leading Manufacturers (Reference)
- Summary Checklist for Procurement
This sounds like you are looking for a High-Temperature Centrifugal Fan specifically designed for use in a sintering plant for the steel industry. These fans are critical for the combustion process, exhaust gas handling, and cooling.
Here is a detailed breakdown of what this equipment is, its key features, and selection considerations.
What is a Sintering Machine High-Temperature Centrifugal Fan?
In a sintering plant, iron ore fines are fused into a porous clinker. This process requires massive airflow.
- Role: It supplies combustion air to the sinter bed (Main Fan) or extracts hot, dust-laden exhaust gases (Induced Draft Fan).
- Type: It is a Large Centrifugal Blower (often a single-inlet or double-inlet design) built to handle extremely hot gases (200°C to 450°C+).
Key Features & Design (What makes it "High-Temp"?)
These are not standard blowers. They are heavy-duty industrial fans engineered for reliability in harsh conditions.
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Material Selection:
- Impeller: Q345R (boiler steel), 16MnR, or stainless steel (e.g., 310S) for blades. For very high temperatures (>350°C), the impeller is often made of alloy steel to prevent creep and deformation.
- Housing: Welded steel plate with reinforced casing to withstand high pressure and thermal expansion.
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Cooling System (Critical):
- Shaft Cooling: The shaft is often hollow with a forced air cooling system to prevent heat transfer to the bearings.
- Bearing Cooling: Water-cooled bearing housings or oil-cooled bearings are standard to remove heat conducted down the shaft.
- Insulation: The fan housing is often internally or externally insulated to reduce radiated heat in the plant.
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High-Dust & Abrasion Resistance:
- Sinter gas contains heavy dust (iron ore, coke fines). The fan includes wear liners on the scroll casing and hard-facing (e.g., Stellite) on the impeller blade leading edges.
- Access doors are provided for cleaning.
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Vibration & Stability:
- Rotor: Dynamically balanced to ISO G2.5 or G1.0 grade.
- Bearings: Heavy-duty spherical roller bearings with forced lubrication.
- Baseplate: Extremely rigid cast-iron or fabricated steel base to absorb vibration.
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Variable Speed Control:
- These massive fans often run via Variable Frequency Drives (VFD) or hydraulic couplings to adjust airflow based on the sintering machine speed, saving significant energy.
Common Applications (Sintering Process)
| Fan Name | Function | Typical Temp | Gas Type |
|---|---|---|---|
| Main Exhaust Fan | Draws air down through the sintering bed. Most critical. | 120°C - 200°C | Hot, high dust, corrosive (SOx) |
| Cooling Fan | Cools the sintered clinker on the cooler. | Ambient - 80°C | Clean air (usually) |
| Booster Fan | Provides additional air for specific burners. | 100°C - 250°C | Hot, moderately dusty |
| Induced Draft (ID) Fan | Pulls flue gas from the stack/scrubber system. | 150°C - 350°C | Hot, corrosive, wet (after scrubber) |
Selection Criteria & Specifications
When searching for a "High Temperature Centrifugal Fan" for a sintering machine, you must provide these parameters to a manufacturer:
- Airflow (Q): m³/h or CFM (e.g., 100,000 - 1,000,000 m³/h for main fans).
- Total Pressure (P): kPa or mmWG (e.g., 10-20 kPa for main exhaust).
- Gas Temperature (T): Operating and peak temperature.
- Gas Composition: Dust concentration (g/Nm³), presence of SO2, water vapor.
- Regulation Method: Damper, VFD, or hydraulic coupling.
- Installation Environment: Indoor/outdoor, ambient temp.
Leading Manufacturers (Reference)
If you are sourcing this equipment, consider these global and Chinese suppliers known for sintering fans:
- Global: Howden, ABB (formerly Fläkt Woods), Zitron, Korf Air, Gardner Denver (Robuschi).
- Chinese (High Quality, Common in New Plants): Chongqing Fan (CFFC), Shanghai Fan, Shenyang Blower Works Group (SBW), Wuhan Blower.
Summary Checklist for Procurement
- Impeller Type: Backward-curved (for efficiency) or Radial/Radial-tip (for heavy dust).
- Bearing Type: Water-cooled pillow block.
- Liner Material: Chrome carbide or ceramic tiles for wear protection.
- Shaft Seal: Labyrinth seal or air purge seal to prevent dust ingress.
- Motor Rating: High power (often 1000 kW+).
Bottom Line: You are looking for a heavy-duty, abrasion-resistant, and heat-resistant centrifugal blower. The key differentiators from a standard fan are the cooling system and wear protection. For a specific quote, you will need to contact a manufacturer with your exact process data.
