Industrial ribbon mixers (or ribbon blenders) are the workhorses of large-scale dry powder and granule mixing.¹ For "big size" industrial needs, these machines scale up to massive capacities, often used in food, chemical, and pharmaceutical plants.²

1. Large-Scale Capacity Range

Industrial ribbon mixers are generally categorized by their Total Volume (trough size) and Working Volume (the safe maximum fill level, typically 60% to 70% of total volume).

2. Technical Specifications for "Big Size" Mixers

When moving to large volumes (e.g., a 5,000L to 10,000L model), the engineering requirements become much heavier:

• Motor Power: Large blenders require significant torque to start under load. A 5,000L mixer typically uses a 30 HP to 50 HP motor, while 10,000L+ models can reach 75 HP to 100 HP.
• Double Helical Ribbon: Big machines use a "double ribbon" design.³ The outer ribbon moves material toward the center, while the inner ribbon moves it toward the ends.⁴ This ensures a homogeneous mix in 15 to 20 minutes, even for large batches.
• Material of Construction (MOC):
• SS 304/316L: Standard for food and pharma to prevent contamination and corrosion.
• Mild Steel (MS): Used for construction materials or fertilizers where hygiene is less critical.⁵
• Discharge Mechanisms: Large batches require fast emptying. Options include Pneumatic Butterfly Valves, Slide Gates, or "Bomb Bay" doors for near-instant discharge.⁶

3. High-Capacity Features (Big Size Only)

• Heavy-Duty Drive Train: Uses a Worm Gearbox or Planetary Reducer to handle the immense stress of turning several tons of powder.⁷
• Liquid Spray Bar: For large batches, an internal spray bar can be added to inject oils, flavors, or perfumes evenly into the powder during mixing.
• Heating/Cooling Jackets: Big mixers can be fitted with an outer "jacket" where steam or chilled water circulates to regulate the temperature of the batch.⁸
• Pneumatic Loading: At this size, manual feeding is impossible. Systems are usually integrated with Screw Conveyors or Vacuum Feeders.⁹

4. Maintenance for Industrial Sizes

• Automatic Hood Lift: Because the lids are too heavy for manual lifting, big machines use hydraulic or pneumatic cylinders to open the top for cleaning.
• Air Purge Seals: Specialized seals on the main shaft prevent fine powder from leaking out and damaging the heavy-duty bearings.¹⁰
• CIP (Clean-In-Place): Large mixers often include internal spray balls to wash the interior without the operator needing to enter the tank.