Complete-line thinking
We size the mill with feeding, dust collection, conveying and electrical control in one process view.
CRRM SERIES · MINERAL POWDER PROCESSING
High pressure grinding mill for minerals.
A proven pendulum grinding system for dependable stone powder production, controlled fineness and practical plant economics.
1973 parent company founded
50+ years of manufacturing
ISO / CE certified products
01
Designed around your feed
Material hardness, moisture, target fineness and output are matched before a configuration is recommended.
01 / ABOUT CRONUS
A manufacturing partner behind the powder.
Shanghai Cronus Machinery Co., Ltd. is a subsidiary of Guilin Mining Machinery Co., Ltd. The parent company, formerly Guilin Mining Machinery Factory, was founded in 1973 and has more than five decades of experience in grinding equipment.
From technical selection to commissioning and wear-part supply, Cronus connects the engineering heritage of Guikuang with an international sales and service team in Shanghai. Our project work covers Raymond mills, ring roller mills, vertical mills, crushers and complete mineral powder lines.
Read the company profile1973Guilin Mining Machinery founded
2013Enterprise restructuring and new development phase
TodayPowder equipment for customers across global markets
PROOF OF MANUFACTURING
Technology, IP and a traceable production base.
Selected certificates and patent records supplied by the Cronus / Guilin Mining Machinery organization.
02 / THE CRRM SYSTEM
High pressure grinding, arranged as a complete line.
The CRRM pendulum mill uses centrifugal grinding force, controlled air classification and negative-pressure conveying to turn prepared minerals into consistent powder.
CRRM / COMPLETE SYSTEM01
Feed and preparation
Crushing, screening, elevator and feeder modules prepare material to a suitable feed size and stabilize the mill load.
02
Grinding chamber
Motor-driven shaft and grinding assembly create rolling pressure between the rollers and grinding ring, reducing the feed by compression and abrasion.
03
Classification
The classifier separates qualified powder from coarse particles. Oversize returns to the grinding zone for another pass.
04
Collection and clean air
Qualified powder is collected by cyclone and bag filter equipment while the negative-pressure circuit helps control dust in the workshop.
Adjustable finenessApprox. 80–400 mesh for common CRRM configurations
Practical wear costWear parts selected for service life and replacement access
Centralized controlPLC-based operation can support an unmanned production room
Negative pressureCleaner process routing with dust collection integrated
03 / WHY CRONUS
Built for output you can run, maintain and scale.
A grinding mill is a production asset, not a catalogue number. Cronus supports the complete decision from material test to after-sales parts.
Made to be serviced
Accessible wear components, clear maintenance points and original drawings simplify routine upkeep.
Manufacturing traceability
Own casting and machining resources support quality consistency, custom parts and project-specific modifications.
Engineering communication
Send us your feed data, desired fineness and output target. We return a practical configuration path.
04 / APPLICATIONS
One mill family. Many mineral powder routes.
CRRM mills are commonly used for non-flammable and non-explosive materials with Mohs hardness below 7. Final selection depends on feed properties and target powder.
Limestone & calcite
Fillers, construction materials and calcium carbonate powder
Barite
Weighting agent and industrial mineral powder applications
Bentonite & kaolin
Foundry, drilling, ceramics and functional mineral products
Quartz & feldspar
Glass, ceramics and engineered stone powder routes
Gypsum
Building materials, plaster and cement-related processing
Dolomite & talc
Rubber, coatings, agriculture and refractory applications
Industrial minerals
Zeolite, fly ash, slag, marble and selected ores
Need a material test?
Send a sample or material report. We can help confirm hardness, moisture, fineness and a suitable process route.
Start a test request05 / FIELD PROOF
See the plant, the process and the powder route.
Use the project media to understand how a mineral grinding line occupies real workshop space and how the equipment is commissioned on site.
Factory tour
Manufacturing, assembly and production environment
Process visual
From feed material to collected powder
Customer site
Bentonite grinding line in operation
PROJECT SNAPSHOT
A line designed around the material, not a generic bill of equipment.
For every project, Cronus considers feed size, moisture, hardness, desired D97, climate, power supply, local installation conditions and dust emission requirements.
Browse more Cronus cases06 / PERFORMANCE DATA
Reference parameters for CRRM configurations.
The values below are reference ranges from the published CRRM product information. Actual output depends on material, moisture, fineness, feed size and process layout.
CRRM 4R3220 to CR2500Configure the right size for your target.
| Model | Feed size (mm) | Fineness (mm) | Capacity (t/h) | Main motor (kW) | Classifier (kW) |
|---|---|---|---|---|---|
| 4R3220 | ≤20 | 0.045–0.18 | 1–6 | 45 | 15 |
| CR1280 | ≤20 | 0.045–0.18 | 1.5–10 | 55 | 15 |
| 5R4128 | ≤20 | 0.045–0.18 | 2–15 | 90 | 22 |
| CR1500 | ≤20 | 0.045–0.18 | 3–18 | 110 | 22 |
| CR1620A | ≤30 | 0.045–0.18 | 5–22 | 160 | 30 |
| CR1700 | ≤30 | 0.045–0.18 | 6–28 | 185 | 37 |
| CR1850 | ≤30 | 0.045–0.18 | 6.5–30 | 200 | 37 |
| CR1920 | ≤30 | 0.045–0.18 | 7.5–33 | 220 | 45 |
| CR2150 | ≤30 | 0.045–0.18 | 10–40 | 250 | 45 |
| CR2500 | ≤35 | 0.045–0.18 | 11.5–50 | 280 | 45 |
Reference only. Please request a project-specific technical proposal for a confirmed configuration and total power list.
CRRM VS CRGM
Choose the fineness first. Then choose the mill.
CRRM is the practical choice for conventional stone powder and higher throughput. CRGM ring roller mills are designed for ultra-fine products where 300–3000 mesh is the core requirement.
Decision pointCRRM high pressure pendulum millCRGM ring roller mill
Typical finenessApprox. 80–400 meshApprox. 300–3000 mesh
Best fitHigher-throughput mineral powder linesUltra-fine fillers and functional powders
Typical output1–50 t/h range by modelApprox. 3–20 t/h range by model
Selection cueChoose when output and operating economy leadChoose when ultra-fine D97 leads
07 / ORIGINAL WEAR PARTS
Keep the line productive with the right parts.
Cronus supplies original and drawing-based grinding mill components with access to casting and machining resources. Correct geometry protects output, vibration and service life.
Ask for a parts list
Grinding rollersWear-resistant rolling surface and matched assembly
Grinding ringDimensional compatibility for stable grinding pressure
Shovels and basesFeed circulation and grinding-zone efficiency
Roller assembliesService-ready replacement for planned maintenance08 / COMPLETE YOUR QUARTZ POWDER LINE
Quartz powder is a process chain, not a single machine.
For quartz and engineered stone powder, combine crushing, grinding, classification, dust collection and sometimes surface modification based on the finished product specification.
01Primary crushing
Reduce run-of-mine stone to a stable feed size before grinding.
02Grinding & classification
Choose CRRM for output-focused powder or CRGM for ultra-fine grades.
03Alternative mill route
For large-scale, stable-feed projects, compare a vertical roller mill route.
04Fine powder upgrade
Add coating or extra classification where the end-use needs surface performance.
09 / SERVICE THAT STAYS WITH THE PROJECT
From material data to a running plant.
The practical support sequence is simple: understand the material, define the target, design the line, verify the details and keep the parts available.
01Process consultationMaterial, capacity, fineness and site conditions
02Engineering proposalEquipment list, layout logic and commercial scope
03Installation supportCommissioning guidance and operator handover
04After-sales responseSpare parts, troubleshooting and follow-up
CUSTOMER VISITS
See the equipment in context before you commit.
Share your location and project stage. We can arrange a factory visit, reference discussion or video call around the equipment you are considering.
Plan a visit or call10 / FAQ
Questions buyers ask before choosing a mineral mill.
The right answer depends on the material and finished powder. These are the questions that help us make the selection precise.
Ask a project-specific questionWhat materials can the CRRM mill process?
It is commonly used for non-flammable, non-explosive minerals such as limestone, calcite, barite, dolomite, gypsum, bentonite, kaolin, quartz, feldspar, talc and selected ores with suitable hardness and moisture.
What is the maximum feed size?
Published reference models accept feed sizes around 20–35 mm. The practical feed requirement should be confirmed with the selected model and upstream crusher.
What powder fineness can I get?
Common CRRM configurations cover approximately 80–400 mesh. If the target is consistently above 600 mesh, compare a CRGM ring roller mill or another ultra-fine route.
How do I choose between CRRM and CRGM?
Start with the target fineness and required output. CRRM generally favors throughput and conventional powder production; CRGM favors ultra-fine grades from about 300 to 3000 mesh.
Can Cronus design the complete production line?
Yes. The scope can include crusher, elevator, feeder, mill, classifier, cyclone, bag filter, conveying, electrical control and supporting structures, subject to the project brief.
Does the system control dust?
The process is arranged as a negative-pressure circuit with cyclone and bag filter collection. Final dust-control performance depends on the complete line design and local requirements.
What information should I send for a quotation?
Send the material name, feed size, hardness or lab report, moisture, desired fineness, capacity, working hours, power standard and any site or emission constraints.
Does Cronus provide original spare parts?
Yes. Cronus supplies rollers, rings, shovels, shafts, bearings, seals and other components for its own systems and compatible equipment based on drawings and dimensions.
Can you test our material before purchase?
Material testing and process verification can be discussed with the engineering team. Provide a sample, test report or representative material data to start.
How long does installation take?
Timing depends on civil work, line size, equipment scope, local labor and shipment. The project schedule is confirmed after layout, foundation and delivery details are reviewed.
Which certificates are available?
Selected Cronus / Guilin Mining Machinery products and systems are supported by ISO quality management and CE documentation. Request the certificate package for your exact quotation scope.
11 / START YOUR PROPOSAL
Tell us what powder you need to make.
Our sales engineers will reply with a suitable mill route, questions for confirmation and a practical next step.
+86 199 2122 1418[email protected]WhatsApp chatNo. 8666 Hunan Road, Pudong District, Shanghai, China