Integrated damping
Structural damping reduces vibration transmitted through the mill and foundation.
CRRM Series
Raymond Mill for 40-400 mesh mineral powder projects
A mature pendulum roller grinding process for dependable conventional powder output, scalable from compact systems to high-throughput lines.
CRRM overview
Heavy-duty pendulum grinding for conventional mineral powder
CRRM combines the main unit, classifier, blower, piping, pulse dust collector and electrical controls. It is used for non-flammable, non-explosive minerals below Mohs hardness 9.3 and generally below 6% moisture.
40-400 meshTypical project range
1-28 t/hPublished platform capacity
20-35 mmModel-dependent feed
10 modelsCatalog platform
Working principle
Pendulum rollers press feed against the grinding ring
- 01
Main shaft driveThe gearbox rotates the center shaft and wobbler spindle, carrying suspended roller assemblies.
- 02
Roller-ring compressionBlades lift feed into the roller-ring gap for repeated compression and shearing.
- 03
Air separationAir carries powder upward; coarse particles return and qualified powder passes the classifier.
- 04
Powder recoveryCyclone and dust collection recover product while the blower balances airflow.
CRONUSPerformance advantages
Industrial throughput, stable transmission and maintainable operation
Grinding geometry
Roller, ring and internal structure support effective material-bed formation.
Heavy-duty reducer
A robust transmission improves stability under continuous loading.
Airflow control
Electric or pneumatic fan-valve options help balance classification.
Maintainable layout
Inspection points and integrated fan arrangement simplify routine service.
Central controls
Operating feedback and alarms standardize start-up and production monitoring.
Technical parameters
Representative CRRM model specifications
| Model | Rollers | Max feed | Published size | Capacity | Main unit | Classifier | Blower |
|---|---|---|---|---|---|---|---|
| CRRM1280 | 3 | 20 mm | 80-400 mesh | 2-10 t/h | 55 kW | 15 kW | 55 kW |
| CRRM1620A | 4 | 30 mm | 80-325 mesh | 3-15 t/h | 160 kW | 30 kW | 132 kW |
| CRRM1850 | 4 | 30 mm | 80-325 mesh | 4.5-20 t/h | 185 kW | 37 kW | 200 kW |
| CRRM2500 | 4 | 35 mm | 80-325 mesh | 8-28 t/h | 315 kW | 45 kW | 355 kW |
The 40-400 mesh project window includes configurations beyond the representative rows. Confirm classifier and fineness during selection.
Mill selection comparison
Why conventional powder projects often favor CRRM over an ultrafine mill
For 40-400 mesh products, throughput, process simplicity and useful installed power matter more than ultrafine capability the market does not need.
CRGM SERIES
Ultrafine Grinding Mill
- Published fineness
- 5-74 μm, approximately 200-2500 mesh
- Typical project target
- 300-3000 mesh; the finest targets require sample testing
- Published capacity
- 0.2-12 t/h across CRGM60-125
- Representative power
- 101-401 kW total installed power
- Maximum feed
- ≤20 mm
- Grinding route
- Multi-layer ring-roller compression and shearing
- Classification
- Vertical turbine classifier for a sharp ultrafine cut
- Best-fit applications
- Coatings, masterbatch, paper, rubber, engineered plastics and functional fillers
CRRM SERIES
Raymond Mill
- Published fineness
- 80-400 or 80-325 mesh on representative models
- Typical project target
- 40-400 mesh
- Published capacity
- 1-28 t/h across the CRRM platform
- Representative power
- 125-715 kW for listed main unit, classifier and blower combinations
- Maximum feed
- 20-35 mm, model dependent
- Grinding route
- Pendulum rollers compress material against the ring
- Classification
- Air classification optimized for conventional powder
- Best-fit applications
- Building materials, desulfurization, metallurgy, ceramics and general mineral powder
When CRRM is the commercially rational routeAt 40-400 mesh, CRRM can accept a larger feed, deliver higher platform throughput and use a mature pendulum process without adding ultrafine classification stages that do not improve the saleable product.
Confirm Your CapacityApplications
High-throughput conventional powder for broad industries
CRRM serves building materials, chemicals, metallurgy, mining, ceramics, refractory, power, coal and general mineral filler production.
Calcite
Coatings, plastic, rubber, paper and artificial marble fillers.
Limestone
Building materials, desulfurization and general mineral filler.
Dolomite
Glass, ceramics, metallurgy and construction fillers.
Barite
Drilling, high-density filler and coating applications.
Kaolin
Ceramics, paper coating, rubber and paint.
Talc
Plastic, coating, ceramic and cosmetic fillers.
Gypsum
Wallboard, plaster, cement and industrial powder.
Bentonite
Foundry, drilling, pelletizing and absorbent products.
Why not use an ultrafine mill?When the required product is 40-400 mesh, CRRM can provide higher throughput and a mature operating route without ultrafine classification complexity that adds no product value.
Discuss Your CapacityCases and customer sites
CRRM production references and site configurations
PETROLEUM COKE
Three CRRM1620A production lines
A multi-line project demonstrating scalable production and practical plant layout.
CUSTOMER PROJECT
Complete mineral powder system
Main unit, classifier, conveying, collection and airflow integrated for continuous operation.
Customer visits
Customers inspecting CRRM main units, wear parts and machining capability
Factory visits let project teams inspect machining, assembly, wear parts, test capability and plant references before finalizing equipment scope.
Frequently asked questions
CRRM Raymond mill FAQ
Use these answers as an initial engineering framework. Final selection still requires raw material and finished-product data.
1. What fineness can a CRRM Raymond mill produce?
Typical projects target 40-400 mesh. Published CRRM catalog models are generally specified for 80-400 mesh or 80-325 mesh depending on model.
2. Can a Raymond mill grind calcium carbonate?
Yes. Calcite, limestone, dolomite and marble are common calcium carbonate raw materials for Raymond grinding lines.
3. What is the maximum feed size?
Published CRRM models accept approximately 20-35 mm feed depending on model. Larger raw material requires upstream crushing.
4. Which minerals are suitable?
The catalog describes non-flammable, non-explosive minerals below Mohs hardness 9.3 and generally below 6% moisture, subject to application review.
5. How is 325-mesh product controlled?
Classifier speed, airflow, feed rate, roller-ring condition and system pressure must be balanced to maintain fineness and output.
6. What determines Raymond mill capacity?
Material grindability, feed size, moisture, target fineness, circulation and airflow all affect output. Catalog capacity is based on stated reference material.
7. What are the main wear parts?
Grinding rollers, grinding ring, blades, classifier components, seals, filters and lubrication parts require planned inspection and replacement.
8. Is a complete production line available?
Yes. A line can include crusher, elevator, silo, feeder, CRRM main unit, classifier, blower, cyclone, pulse filter, conveying and electrical controls.
9. Why choose CRRM instead of CRGM?
For conventional 40-400 mesh products, CRRM often provides a simpler process and higher throughput without paying for ultrafine classification that the market does not require.
10. Does CRONUS support installation?
CRONUS can provide process design, layout guidance, installation support, commissioning coordination, training and spare-parts service according to the agreed scope.
Confirm the right CRRM model for your output
Send material, feed size, target mesh and required tons per hour.