Stable pendulum grinding
Four roller assemblies swing outward under centrifugal force. The grinding pressure is generated mechanically, keeping output stable across long shifts.
CRRM SERIES · NIGERIA READY
4R3220 Raymond Mill
built for steady powder.
A dependable pendulum grinding system for Nigeria's limestone, barite, kaolin and dolomite processors. Designed by Cronus, a Guilin Mining Machinery company with more than 50 years of manufacturing experience.
1-80t/h
capacity80-400mesh
fineness35 mmmax feed size
4R3220 / FULL SYSTEM
Configured for your material, moisture and
target fineness
ENGINEERED IN CHINA · SERVICE FOR WEST
AFRICAScroll to explore ↓
Since 197350+ years of plant building
Guilin Mining MachineryIndustrial manufacturing group
CE · ISOQuality and compliance systems
Turnkey supportFrom test to commissioning
CRONUS CAMPUSBuilt around the work.
THE COMPANY BEHIND THE MILL
One factory.
Five decades of proof.
Cronus is the international-facing company of Guilin Mining Machinery Co., Ltd. Founded in 1973, the group has spent more than 50 years designing, casting, machining and commissioning grinding equipment for mineral processors.
Our engineers work across the full line: feed preparation, grinding, classification, dust collection, conveying and controls. That means a 4R3220 proposal is matched to your ore and your operating reality in Nigeria, not pulled from a catalogue.
1973Founded
50+Years of experience
30+Countries served
CREDENTIALS THAT TRAVEL WITH THE MACHINE
Quality is documented, not promised.
HOW THE 4R3220 WORKS
Simple flow. Controlled result.
Material enters through the feeder, is crushed and ground between the rollers and ring, then classified by the turbine. Qualified powder is carried to the cyclone collector while coarse particles return for another pass.
01 ·
FEED02 · GRIND03 · CLASSIFY04 · COLLECTClosed-circuit classification
A turbine classifier separates finished powder from coarse particles. Adjust the classifier speed to set the target 80-400 mesh range.
Air separation and collection
The high-pressure fan drives a closed air circuit. Cyclones collect product efficiently and reduce dust escape around the mill.
Serviceable wear zone
Roller sleeves, ring, blades and bearings are designed for inspection and replacement without rebuilding the complete machine.
Low moistureFor non-flammable material up to 6% moisture
Mohs ≤ 7Suitable for a broad mineral feed envelope
ExpandableCan be configured as a sand-powder integrated line
MATERIALS & INDUSTRIES
One mill, many revenue streams.
From construction minerals to chemical fillers, the 4R3220 helps Nigerian operators convert local resources into consistent, saleable powder.
Construction minerals
Limestone & calcite
For cement extenders, putty, tile adhesive and calcium carbonate lines.
Oilfield minerals
Barite
Controlled fineness for drilling mud and industrial fillers.
Ceramics & paper
Kaolin
Clean, adjustable powder for coatings and ceramics.
Metallurgy
Bauxite & iron ore
Reliable preparation for beneficiation and agglomeration.
Fertilizer & glass
Dolomite
Stable throughput for agriculture and industrial processing.
Building products
Gypsum & coal gangue
Fine powder for boards, plasters and blended materials.
Construction materialsMetallurgyPower &
utilitiesChemicalsMiningRoad materials
FIELD EXPERIENCE
Designed in Guilin.
Proven in production.
Selected Cronus installations show the same pattern we plan for Nigeria: robust civil works, clean airflow, and a layout that operators can actually maintain.
FUJIAN · LIMESTONE
High-fineness limestone line
A compact 4R3220 line with cyclone collection for consistent filler powder and lower housekeeping load.
Discuss a similar line →
GUANGDONG · BENTONITE
Moisture-aware process design
Air volume and classifier settings tuned around clay behaviour to protect product fineness and uptime.
Ask for the process sheet →
YUNNAN · CALCITE
Reliable calcium powder output
Built for repeatable quality where customers sell by mesh and whiteness, not just by tonnes.
Plan your Nigeria site →
SEE THE SYSTEM IN MOTION
From feed to finished powder
Watch the 4R3220 layout and airflow logic before we tailor your own line. The on-screen Cronus mark identifies the source material.
Request a process review →TECHNICAL DATA
Numbers your team
can plan around.
Final power, air volume and wear configuration are confirmed after a material test. The reference values below are for a standard 4R3220 system.
| Model | 4R3220 | Roller quantity | 4 |
|---|---|---|---|
| Max feed size | ≤ 35 mm | Finished fineness | 80-400 mesh |
| Capacity | 1-80 t/h | Feed moisture | ≤ 6% |
| Material hardness | Mohs ≤ 7 | System type | Closed air circuit |
| Main machine size | 2250 × 2250 × 1850 mm | Main machine weight | Approx. 5,320 kg |
| Classifier | 4R3220 turbine | Collection | Double cyclone |
*Capacity depends on feed hardness, moisture, fineness, grinding index and plant configuration.
MAKE THE RIGHT FIRST CHOICE
Why a Raymond mill
beats a crusher for powder.
Crushers are excellent at reducing lump size. They are not designed to deliver a controlled, saleable powder. The 4R3220 closes that gap in one engineered circuit.
| Decision point | 4R3220 Raymond Mill | Hammer crusher | Jaw crusher |
|---|---|---|---|
| Output target | 80-400 mesh, adjustable | Coarse to medium aggregate | Coarse primary reduction |
| Classification | Integrated turbine classifier | Screen-based, less precise | Not integrated |
| Dust control | Closed air circuit + cyclones | Needs extra dust system | Needs extra dust system |
| Powder quality | Consistent and saleable | Broader size distribution | Not a powder process |
| Best fit | Mineral powder, fillers, building materials | Soft to medium crushing | Hard rock primary crushing |
WEAR PARTS & SPARES
Original parts.
Less waiting.
Cronus supplies original wear parts from its own casting and machining network. You get the right fit, traceable metallurgy and a practical price for ongoing operation.
Roller assembly
Balanced assembly for even grinding pressure and predictable wear.
Grinding ring
Cast for the abrasion profile of your feed, with clear replacement guidance.
Blade assembly
Maintains the right airflow and material lift inside the grinding chamber.
Turbine classifier
Fine-tunes separation and protects your target mesh across campaigns.
Original fitDrawings and part numbers match your 4R3220.
Own casting networkMaterial traceability from melt to finished part.
Practical pricingPlan a wear-part kit before commissioning day.
Build my spare-parts list →
QUESTIONS, ANSWERED
Clear answers
before the quote.
A good project starts with the right questions. Here are the ones Nigerian plant owners ask us most often.
Ask a project engineer →What can the 4R3220 grind?
It grinds non-flammable, non-explosive minerals up to Mohs 7 hardness and up to 6% moisture, including limestone, calcite, barite, kaolin, dolomite, gypsum, bauxite, coal gangue and more.
What output can I expect in Nigeria?
Reference capacity is 1-80 t/h. Actual output depends on material hardness, moisture, feed size, target mesh and the selected fan, classifier and dust collection layout.
Can the product fineness be changed?
Yes. The turbine classifier speed and airflow are tuned to deliver 80-400 mesh. We confirm the operating window with a sample test or your existing lab data.
Is the 4R3220 a complete plant or only the mill?
Both are possible. We can supply the main mill or a complete line with crusher, bucket elevator, feeder, classifier, cyclone collector, fan, ducting and electrical controls.
How much space does the standard line need?
The main machine reference footprint is 2250 x 2250 mm. The full footprint is planned around your feed, storage, access, local building code and maintenance clearance.
How do you handle the power supply?
We size the motor and electrical package around your grid conditions. Nigerian projects are commonly reviewed for voltage stability, generator compatibility and dust-safe cable routing.
What is the normal delivery lead time?
Lead time depends on configuration and production schedule. After confirming material and layout, we issue a technical-commercial proposal with a realistic shipping window.
Do you provide installation and commissioning?
Yes. Cronus can provide foundation drawings, installation guidance, remote or on-site commissioning, operator training and a recommended first-year spare-parts kit.
How often do wear parts need changing?
Wear life varies with feed abrasiveness, hours and product target. We use your test data to estimate a replacement cycle and keep critical parts available.
Can you test our material first?
Yes. Send a representative sample or a complete material profile. We will confirm grindability, fineness, expected capacity and the right dust collection approach.
What warranty and after-sales support are included?
Warranty terms are stated in the project contract. Support includes remote troubleshooting, process tuning, spare-parts supply and service guidance throughout the machine life.
How do I start a quotation?
Share your material, moisture, feed size, target mesh, desired t/h, power conditions and site country. Our engineer will return a practical first layout and checklist.
LET'S PLAN YOUR LINE
Tell us what you
want to produce.
Send the basics and a Cronus engineer will reply with a 4R3220 recommendation, process flow and next-step questions.
☎
Phone / WhatsApp+86 199 2122 1418
✉
Emailsales@shcronus.com
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Shanghai officeNo. 8666 Hunan Highway, Pudong, Shanghai