Coarse Powder Grinding Mill
The Coarse Powder Grinding Mill is a European-style hammer grinding system designed for producing coarse powders and sand-sized particles in the 0 to 5mm range. Unlike fine grinding mills that target mesh-size outputs, this equipment bridges the gap between crushing and fine grinding, producing material suitable for construction sand, road base aggregate, and coarse mineral fillers. The hammer-type grinding mechanism delivers high throughput with low energy consumption, making it an economical choice for aggregate producers and mineral processors who require coarse to medium-fine output for construction and infrastructure applications.
Working Principle
Material enters the grinding chamber through a feed hopper and is struck by high-speed rotating hammers. The hammers shatter and pulverize material against breaker plates and screen grates. Ground material passes through screen openings of configurable size, determining the maximum output particle size. Oversized particles remain in the chamber for further impact grinding. The mill can operate with or without air classification, depending on whether dry powder or granular output is required.
The grinding process is precisely controlled by the integrated classification system, which separates qualified fine powder from coarse particles. Coarse particles fall back to the grinding chamber for regrinding, while fine powder is conveyed by airflow to the cyclone collector and then to the finished product silo. This closed-circuit design ensures consistent product quality and high grinding efficiency.
Key Features & Advantages
High Throughput
Hammer-type grinding delivers high capacity for coarse and medium-coarse output, ideal for construction aggregate and sand production.
Adjustable Output Size
Interchangeable screen grates allow quick changes to output particle size, ranging from 0 to 5mm or up to 30mm for specific models.
Low Investment
Simple, robust design requires lower capital investment than roller-ring mills, making it accessible for small to medium operations.
Applications & Industry Use
This equipment is widely used across multiple industries for various powder processing applications:
- Construction sand production
- Road base aggregate
- Coarse mineral filler
- Coal grinding for boilers
- Gypsum processing for construction
- Raw material preparation for fine grinding
Processable Materials
The versatile design of this equipment allows it to process a wide range of non-metallic minerals and industrial materials. Below are some of the most commonly processed materials. For detailed grinding solutions for each material, please visit our materials page.
Technical Specifications
The following table provides detailed technical parameters for each model in this product series. These specifications are based on standard configurations and may vary depending on material properties and specific application requirements. Contact our engineering team for customized configurations.
| Model | CP-Small | CP-Medium | CP-Large |
|---|---|---|---|
| Output Size (mm) | 0-5 | 0-10 | 0-30 |
| Capacity (t/h) | 3-15 | 10-40 | 20-80 |
| Main Power (kW) | 22-37 | 55-90 | 110-200 |
Performance & Efficiency
The Coarse Powder Grinding Mill is designed for maximum grinding efficiency and energy savings. The optimized grinding chamber geometry, combined with high-precision classification, ensures that energy is used effectively for particle size reduction rather than wasted on over-grinding or heat generation. Compared to conventional milling systems, our equipment typically achieves 20-30% lower power consumption per ton of finished powder.
Key performance metrics include stable fineness control with deviation less than 5%, low noise levels below 75 dB at 1 meter distance, and dust emissions below 20 mg/m3 when equipped with our pulse bag filter system. These performance characteristics make our equipment suitable for even the most demanding industrial environments and stringent environmental regulations.
Installation & Commissioning
Proper installation is critical for optimal equipment performance and longevity. Our experienced engineers provide on-site installation and commissioning services, including equipment positioning, alignment, electrical connection, piping installation, and system integration. The typical installation timeline ranges from 15 to 45 days depending on equipment model and production line complexity.
During commissioning, we conduct comprehensive performance tests including no-load test, load test, and production trial runs. We verify all performance parameters meet design specifications, calibrate control systems, train your operators on proper operation and maintenance procedures, and deliver a complete commissioning report with all test data.
Frequently Asked Questions
This mill is ideal for soft to medium-hard non-metallic minerals like limestone, gypsum, coal, and dolomite. It is not recommended for highly abrasive materials like quartz or for applications requiring fine (mesh-size) output.
Output size is primarily controlled by the screen grate opening size. Interchangeable screens of different opening sizes are available, and changes can be made in minutes.