DP® IP Impact Pulveriser
The DP® IP Impact Pulveriser is a medium-speed, screenless hammer mill with an integrated whizzer classifier. It combines impact grinding and dynamic classification in a compact unit, typically producing particle sizes from 60 to 300 mesh. The system ensures adjustable fineness control, versatile performance, and reliable operation—even for continuous duty and diverse materials.
- Allowable Feed Size: 0 to 25 mm
- Achievable Output Fineness: 250 Microns to 50 Microns
- Throughput Capacity: 10 kg/hr to 3000 kg/hr
Working Principle
The DP® IP Impact Pulveriser combines continuous grinding and dynamic classification within a single compact system. Feed material enters through the feed hopper (1) and is regulated by the feed rotor (2) before being directed into the grinding chamber (3). Inside this chamber, high-speed swing-type hammers (4) mounted on the rotating shaft strike and accelerate the material outward toward the serrated liner (5). The liner redirects particles back into the hammer path, causing repeated impacts and efficient size reduction through collision and attrition.
As grinding progresses, the air stream generated within the system and assisted by the return air inlet (13) helps convey the material toward the classification chamber (6). In this zone, the whizzer classifier (7) separates particles according to size. Finer particles pass through the classifier while coarser particles are rejected and returned to the grinding chamber for further reduction, creating an internal recirculation loop that ensures uniform product fineness.
The accepted fine material is then drawn into the fan chamber (8) where the impeller (9) provides conveying airflow. Secondary air introduced through the secondary air inlet (14) supports smooth transport and stabilizes flow conditions. The final product, carried in the air stream, exits through the product outlet to cyclone (15) for downstream separation and collection, ensuring efficient operation, controlled particle size, and continuous processing performance.
Features & Benefits
- Integrated grinding and classification system combining size reduction and particle separation in one compact unit.
- Wide fineness control range capable of producing powders from coarse granulation down to fine mesh sizes.
- Adjustable whizzer classifier enables precise control of particle size distribution without changing internal components.
- Heavy-duty hammer rotor design delivers strong impact energy for efficient grinding of diverse materials.
- Integrated conveying airflow eliminates the need for separate external conveying systems in many installations.
- High airflow operation promotes cool grinding, making it suitable for temperature-sensitive materials.
- Available in abrasion resistant design for materials up to 6-7 Mohs hardness
Machine sizes
Options & Accessories
- Construction Materials: Available in carbon steel, stainless steel (SS304, SS316, SS316L), or custom-engineered configurations to meet specific product or regulatory requirements.
- Pressure Shock Resistance: Can be designed to withstand pressures up to PSR 11 Bar.
- Wear Protection Options: Replaceable liners, hard-faced components, and abrasion-resistant materials extend service life in demanding applications.
- Hammer Configurations: Interchangeable hammer types (swing, fixed, serrated, or hardened alloy) optimized for different feed materials and fineness ranges.
- Feeding & Discharge Systems: Compatible with screw feeders, vibratory feeders, gravity feed hoppers, pneumatic conveying, and gravity discharge arrangements.
- Safety Mechanisms: Can be equipped with vibration sensors, temperature sensors, and safety interlocks to ensure operational safety and equipment protection.
- Metal Separation: Can be provision for inline magnetic separators or metal detectors to protect the classifier and ensure high product purity.
This configuration is very popularly used for grinding of turmeric. To prevent heating of the grinding chamber and thereby loss of essential oils in the spice, the serrated liners are available in a water-jacketed design to allow for circulation of cold water in the grinding chamber. A check vibratory sifter is added below the cyclone to remove small coarse fibres content and only allow the fine turmeric powder to move to the next packaging stage.
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