PMD Direct-Drive Grinding Mill
Summary: The PMD Grinding Mill features permanent magnet direct-drive technology, saving 15% energy by removing gearboxes. With 6-55 t/h capacity and intelligent control, it offers efficient, low-maintenance grinding for non-metallic minerals.
Capacity: 6-55 t/h
Discharge Fineness: 1.6-0.045mm
The PMD Permanent Magnet Direct-Drive Intelligent European Grinding Mill is a new-generation high-efficiency grinding solution independently developed by Liming Heavy Industry. By adopting permanent magnet direct-drive technology and an intelligent control system, this mill significantly improves energy efficiency, operational stability, and automation level, making it ideal for modern powder processing plants.
Mineral Processing:
The PMD grinding mill is suitable for processing a wide range of materials, including limestone, quicklime, calcite, gypsum, dolomite, kaolin, barite, petroleum coke, and other non-metallic minerals.
Production Line
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Power plant flue gas desulfurization (FGD)
Non-metallic mineral powder processing
Building materials industry
Chemical industry raw material grinding
Clean coal and petroleum coke preparation
Product Features
- Permanent magnet direct-drive motor with no gearbox or belt transmission
- Intelligent control system with optional mobile APP remote operation
- Online automatic lubrication for key components
- High-efficiency classifier with optimized airflow design
- Multi-point condition monitoring for safe and stable operation
- Energy-saving and environmentally friendly design
Technical Advantages
Permanent Magnet Direct-Drive System
The PMD grinding mill eliminates traditional reducers and belt transmission systems.
The permanent magnet motor directly drives the grinding unit,
greatly reducing mechanical losses and improving transmission efficiency.
Compared with conventional grinding mills,
the system achieves approximately 15% overall energy savings
and significantly improves long-term operational reliability.
Intelligent Lubrication System
Key components such as grinding rollers and classifiers are equipped
with an online automatic lubrication system.
This design allows continuous operation without shutdown for routine lubrication,
reducing maintenance workload and ensuring 24-hour stable production.
High-Efficiency Classifier
The upgraded classifier features improved sealing performance
and optimized internal airflow velocity.
This increases classification efficiency,
improves finished product uniformity,
and reduces the circulation of unqualified particles.
High-Performance Energy-Saving Fan
The mill is equipped with a high-efficiency fan
that improves pneumatic conveying efficiency
and reduces power consumption by approximately 8–10%.
Multi-Point Intelligent Monitoring
Multiple high-precision sensors monitor temperature, vibration,
and operating conditions in real time.
Potential faults can be detected in advance,
helping to prevent unexpected downtime and quality fluctuations.
Working Principle
Crushed materials are evenly fed into the grinding chamber by a variable-frequency belt feeder. Grinding rollers and rings apply rolling and crushing forces to the material. The ground powder is carried by airflow into the classifier for separation. Qualified powder enters the cyclone collector for collection, while oversized particles return to the grinding chamber for further grinding. The entire system operates under negative pressure and is equipped with a pulse dust collector, ensuring clean and environmentally compliant production.
