5-55-12.5C Electrolytic Aluminum High Temperature Centrifugal Fan 110kw 68000 Air Volume

This article's table of contents introduction:

1. Key Specifications Summary (Typical for this model)
2. Why is this fan specific to Aluminum?
3. Common Issues / Maintenance:
4. Are you looking for:

It appears you are referencing specifications for a specific industrial fan model, likely used in aluminum smelting or other high-heat metallurgical processes. Here is the breakdown of the specifications you listed, along with their typical meaning and application.

Model: 5-55-12.5C (or 5-55-12.5C)

• 5-55: This is the fan series/type. It typically refers to a high-temperature, centrifugal fan designed for heavy industrial use with backward-inclined blades (efficiency-oriented).
• 5: This is the impeller diameter in decimeters. 12.5 decimeters = 1250 mm (approx. 49 inches).
• C: This indicates the drive arrangement. "C" type usually means the impeller is overhung and driven by a belt drive (pulleys and belts) from an external motor, rather than direct drive. This allows for speed adjustments.

Motor: 110 kW (approx. 147 HP)

• This is the motor power. For a fan this size, this is a high-power, heavy-duty motor (likely 6-pole or 8-pole, 3-phase, 380V/660V or similar industrial voltage).

Performance: 68,000 Air Volume

• This is the airflow capacity, almost certainly measured in m³/h (cubic meters per hour).
• 68,000 m³/h is a very large volume, typical for:
  • Electrolytic cell fume extraction in aluminum smelters (capturing fluoride gases and heat).
  • Flue gas desulfurization (FGD) or dust collection systems.
  • Large-scale furnace ventilation.

Special Feature: "Electrolytic Aluminum High Temperature" This is the critical application. In aluminum production (Hall-Héroult process):

• Gas: The fan handles hot, corrosive gas containing HF (hydrogen fluoride), SO₂, CO₂, and alumina dust.
• Temperature: The casing and impeller must be built to withstand 200°C to 350°C (or higher) continuously.
• Material: The impeller is typically made of high-strength, corrosion-resistant alloy steel (e.g., 16Mn or stainless steel for critical parts). The shaft is usually 40Cr (Chromium alloy) or similar.
• Key Design Feature: The fan must have a water-cooled bearing housing (cooling fan or water jacket on the shaft) to prevent heat transfer from the hot shaft to the bearings.

Key Specifications Summary (Typical for this model)

Why is this fan specific to Aluminum?

1. High Temperature: The exhaust from the electrolytic pots (750-960°C) is cooled to ~150-300°C before the fan, but it is still much hotter than standard fans.
2. Corrosion: The HF gas attacks standard carbon steel. The fan must be coated (e.g., with epoxy/phenolic) or made from stainless steel.
3. Spark Resistance: The impeller is often made of aluminum alloy or non-ferrous material to prevent sparks if it rubs against the casing (important for combustible gas mixtures).

Common Issues / Maintenance:

• Bearing failure due to heat soaking if the cooling system fails.
• Impeller erosion from alumina dust (requires hardfacing or ceramic lining).
• Unbalance from dust buildup (requires regular cleaning of the impeller blades).

Are you looking for:

1. A replacement fan with these specs?
2. Technical data (fan curve, pressure, speed)?
3. Installation/operation guidance (e.g., how to start this up safely)?
4. A quote or a drawing?

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