PMD Permanent Magnet Direct-Drive Intelligent European Grinding Mill - Grinding Equipment

PMD Direct-Drive Grinding Mill

Capacity: 6-55 t/h

Discharge Fineness: 1.6-0.045mm

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.

Applications

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

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.

Advantage

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.