Design and Working Principle

The Air-Swept Turmeric Grinding system operates in a continuous closed-loop circuit with controlled feeding, impact grinding, air conveying, and filtration.

Step 1: Vibro Feeder Feeding

Turmeric fingers/bulbs are dosed uniformly via a Vibro Feeder.

• Provides smooth material flow
• Controls feed rate to avoid mill overload

Step 2: Inclined Belt Conveyor

Transfers material from feeder to mill inlet.

• Designed for continuous, choke-free feeding
• Ensures stable loading to Air Swept Mill

Step 3: Grinding in Air Swept Mill

Inside the mill, turmeric is reduced by:

• High-speed impact
• Shearing between rotor & liner
• Turbulent airflow carrying material through chamber

Key advantage: Air acts as a cooling medium → prevents colour loss & volatile oil loss

Step 4: Pneumatic Conveying to Cyclone

Fine material is picked by conveying air and carried to the cyclone separator.

• Air stream keeps product temperature low
• Ensures uniform particle size

Step 5: Cyclone Separation

Cyclone separates powdered turmeric from conveying air.

• Heavy particles fall into Rotary Air Lock
• Minimizes dust load to bag filter

Step 6: Bag Filter Dust Collection

Remaining ultrafine particles are captured.

• Ensures < 20 mg/Nm³ emissions
• Provides > 99% product recovery

Step 7: Product Discharge

Powder collected below cyclone and bag filter through two RALs into collection bins/packing line.

Step 8: Central Control Panel

Controls all motors, interlocks, feeders, and safety parameters.

Model Description

Variant	Model	Capacity (Approx.)	Target Fineness
TP-15-SS	ASM 15 SS 304	80-100 Kg/hr	95% 400 Microns
TP-25-SS	ASM 25 SS 304	150 – 200 kg/hr	95% 400 Microns

Key Components

Component	Function	Key Technical Feature
Air Swept Mill	Responsible for grinding turmeric into fine uniform powder	Screenless design, low-heat operation, impact + air sweep grinding, 300–400 µm fineness
Bag Filter System	Separates fine powder from air & controls dust emissions	Pulse jet cleaning, >99% product recovery, hygienic operation
Centrifugal Fan	Provides required airflow for conveying & cooling	High-volume airflow, ensures <15–20°C temperature rise
Vibro Feeder	Doses turmeric fingers evenly into conveyor/mill	Controlled feeding, avoids mill surges
Inclined Belt Conveyor	Transfers turmeric to mill	Stable, continuous feed, food-grade belt option
Cyclone Separator	Separates powder from conveying air	High separation efficiency, reduces bag filter load
Rotary Air Lock (Below Cyclone & BF)	Air-sealed discharge of product	Ensures steady discharge without air leakage
Control Panel (PLC/HMI)	Controls complete system	VFD-based feeder & fan control, safety alarms, interlocks

Features & Benefits

• Curcumin Retention

The "Cool Grinding" airflow design minimizes temperature rise, preventing the oxidation of Curcumin and preserving the bright yellow-orange colour.

• Low-Heat Grinding

Preserves Curcumin & Volatile Oils

• Uniform Powder Fineness (300–400 microns)
• Dust-Free Operation

The entire line is negative-pressure sealed. No yellow dust escapes into the factory, ensuring operator health and hygiene.

• Wear Protection

Critical wear parts (hammers, liners) are made from Hardened Alloy Steel or Tungsten Carbide tipped to withstand the abrasive nature of turmeric.

• Continuous Industrial Duty:

24/7

• Automation

PLC-controlled feed rates ensure the mills are never overloaded, maximizing uptime.

Applications

• Culinary: Standard 60–80 mesh powder for curry mixes and retail packs.
• Extraction: Coarse grits (20–40 mesh) for Oleoresin/Curcumin extraction plants.
• Nutraceutical: Ultra-fine (100+ mesh), high-Curcumin powder for capsules and supplements.
• Natural Colorant: Super-fine powder for food colouring applications.