Руководство по горному оборудованию: What Equipment Should You Use for Cement, Metallurgy, Chemical and Coal Industries? A Complete Guide to Roller Crushers

The pair roller crusher operates reliably, is easy to maintain, has low operating costs, and features adjustable discharge particle size. According to the number of rollers, it can be divided into double-roll crushers and four-roll crushers, and can be widely used in industries such as cement, metallurgy, chemical, power, coal, and artificial sand making for processing brittle and tough materials. Why choose a pair roll crusher? First, it works reliably, is easy to maintain, and has low operating costs, making it suitable for long-term continuous operation; Second, the discharge particle size is adjustable, allowing flexible control of finished product particle size by adjusting the gap between the two rollers to meet different process requirements; Third, it has a wide range of applications and can be widely used in industries such as cement, metallurgy, chemical, power, coal, and artificial sand production; Fourth, it delivers excellent crushing performance for both brittle and tough materials; Fifth, the structure is simple, the equipment is relatively lightweight, and installation and maintenance are convenient. Pair roll crushers are mainly used in the cement industry for crushing clinker and limestone, for metallurgy for crushing ore and coke, for chemical industry raw material crushing, for power industry coal crushing, for coal production with artificial sand and gangue crushing, as well as for the pretreatment stage of artificial sand production lines. People who need roll crushers include equipment procurement and operation departments of cement plants, metallurgical and mining enterprises, chemical plant equipment maintenance departments, power and coal preparation plant equipment procurement departments, artificial sand production enterprises, crushing line EPC contractors, equipment distributors and inventory providers, overseas infrastructure and mining project buyers. Under what circumstances should a pair roller crusher be selected or replaced? It is necessary to handle brittle and tough materials and require adjustable discharge particle size; Industries such as cement, chemical, and coal require medium fine crushing of raw materials or fuels; Old crushing equipment is severely worn, has insufficient processing capacity, or has unadjustable discharge particle size and needs to be replaced; New artificial sand production lines or coal preparation plants require fine crushing equipment; Export projects require counter-roll crushers suitable for overseas voltage and brittle/tough material conditions. How to choose a counter-roll crusher? Step one: Confirm the material properties; counter-roll crushers are suitable for processing brittle and tough materials; Step two: Confirm the number of rollers, selecting a double-roll or four-roll crusher based on processing capacity and finished product requirements; Step three: Confirm feed particle size: select a model with feed particle size ≤25mm or ≤30mm; Step 4: Confirm the discharge port size. Choose a discharge port of 2-8mm or 2-10mm according to the finished product granularity requirements; Step 5: Confirm processing capacity. Choose a model within the range of 5-110t/h according to the production line capacity requirements; Step 6: Confirm motor power. Choose a dual motor configuration of 5.5×2 to 110×2 kW based on processing capacity and material hardness; Step 7: Confirm installation foundation. It must be installed on a solid concrete foundation and fixed with anchor bolts; Step 8: Confirm the material of wear parts. Select high manganese steel or high chrome cast iron roll shells based on material abrasiveness.

Roller Crusher Model and Parameter Table

Model	Roller Diameter (mm)	Roller Length (mm)	Feed Size (mm)	Discharge Port (mm)	Processing Capacity (t/h)	Motor Power (kW)	Weight (t)
2PG0425	Φ400	250	≤25	2-8	5-10	5.5×2	2.2
2PG0640	Φ610	400	≤25	2-8	10-20	15×2	5.9
2PG0740	Φ700	400	≤25	2-8	15-30	30×2	9.8
2PG0850	Φ800	500	≤25	2-8	20-40	45×2	13.5
2PG1060	Φ1000	600	≤30	2-10	30-50	55×2	17.2
2PG1260	Φ1200	600	≤30	2-10	40-70	75×2	28.5
2PG1280	Φ1200	600	≤30	2-10	60-110	110×2	39.3

General Technical Parameter Table

Parameter	Specification
Type	Roller Crusher (Double Roll/Quad Roll)
Roller Diameter	Φ400–Φ1200mm
Roller Length	250–600mm
Feed Size	≤25–≤30mm
Discharge Port Adjustment Range	2–10mm
Processing Capacity	5–110t/h
Motor Power	5.5×2–110×2kW
Weight	2.2–39.3t
Applicable Materials	Cement clinker, limestone, ores, coke, coal, chemical raw materials, and other brittle and tough materials
Core Advantages	Reliable operation, easy maintenance, low operating cost, adjustable discharge granularity

Dimension Diagram and Key Dimensions: `[Image: /images/roller-crusher-dimension-drawing.webp]`

Material Table

Component	Standard Material	Optional Material	Description
Frame / Housing	High-strength cast steel / carbon steel	Wear-resistant steel plate	Bears crushing reaction force, requires high rigidity
Roll shell / Roller	High manganese steel (ZGMn13)	High chromium cast iron, alloy steel	Core consumables, highly wear-resistant
Main shaft / Roll shaft	40Cr / 42CrMo forgings	Alloy steel	Quenching and tempering treatment, withstands huge torque
Bearing	Self-aligning roller bearing	Double-row cylindrical roller bearing	Bears heavy load and impact
Drive gear	40Cr/20CrMnTi	Alloy steel	Carburizing and quenching, smooth transmission
Motor	Full copper coil motor	Explosion-proof motor	Standard three-phase asynchronous motor
Control box	Carbon steel / Stainless steel	Rainproof and dustproof type	Optional variable-frequency speed control

Installation method: The double-roll crusher must be installed on a sturdy concrete foundation, which should withstand the equipment's own weight and the huge impact load during crushing operations; during installation, ensure the foundation's level meets requirements, and tighten the anchor bolts according to torque specifications; after positioning the equipment, adjust the level to ensure the two roll shafts are parallel; the motor and crusher are connected via a V-belt or direct drive, and belt tension or alignment precision must be adjusted to ensure smooth transmission; adjust the gap between the two rolls to ensure the discharge port size meets the finished product size requirements; after installation, conduct a no-load test run, check if the rollers rotate smoothly, and monitor for any abnormal vibration or noise, confirming the roll gap is even; during load test run, gradually increase feeding volume, observe crushing effect and motor current, ensuring it does not exceed rated current; a dust removal system should be equipped to reduce dust pollution; a central control system can be equipped for online monitoring and automatic control.

Application scenario table

Industry	Application	Recommended Configuration	Key Requirements
Cement Industry	Clinker, limestone crushing	2PG0740–2PG1280	Adjustable output size, stable operation
Metallurgical Industry	Ore, coke crushing	2PG0850–2PG1280	Wear-resistant, large capacity
Chemical Industry	Raw material crushing	2PG0425–2PG1060	Adjustable discharge size, pollution prevention
Power Industry	Coal crushing	2PG0640–2PG1260	Large capacity, non-clogging
Coal Industry	Coal gangue crushing, artificial sand making	2PG1060–2PG1280	Controllable output size, good particle shape
Artificial Sand Making	Pre-treatment before sand making	2PG0425–2PG1060	Controllable finished product size, reasonable grading

Note: The double roller crusher is suitable for brittle and tough materials such as cement clinker, limestone, ore, coke, coal, and chemical raw materials, with a feed size ≤25-≤30mm and a discharge opening adjustment range of 2-10mm. Double roller crushers are suitable for medium and fine crushing, while four-roller crushers are suitable for fine and ultra-fine crushing. Explosive environments require optional explosion-proof motors. High-abrasion materials are recommended to use high-chrome cast iron or alloy steel roller surfaces.

Selection Considerations (Compared with Hammer Crushers and Impact Crushers): The core differences between double roller crushers and hammer crushers, impact crushers lie inthe crushing principle and applicable materialsThe roller crusher crushes and grinds materials by squeezing them between two counter-rotating rollers. It is suitable for brittle and tough materials. The discharge particle size is adjustable, and the operating cost is low, but the processing capacity is relatively small. The hammer crusher crushes materials by hammer impact at high speed, suitable for medium-hard materials, with a high crushing ratio and output, but the hammer wears quickly. The impact crusher crushes materials by impact with the plate hammer, suitable for medium-hard materials, with good product shape, but the plate hammer wears quickly. In selection, for brittle/tough materials requiring adjustable discharge particle size, the roller crusher is preferred; for medium-hard materials requiring high output and high crushing ratio, the hammer crusher is preferred; and for medium-hard materials with strict particle shape requirements, the impact crusher is preferred.

## Technical FAQ

1. What is a roller crusher?

The roller crusher operates reliably, is easy to maintain, has low operating cost, and the discharge particle size is adjustable. According to the number of rollers, it can be divided into double-roller crushers and four-roller crushers. It is widely used in industries such as cement, metallurgy, chemical, electric power, coal, and artificial sand making for processing brittle and tough materials.

2. What is the working principle of a roller crusher?

During operation, two counter-rotating rollers draw the material into the crushing chamber, where the material is crushed by the pressing and grinding action of the rollers. The crushed material is discharged through the gap between the two rollers. The discharge particle size is controlled by adjusting the gap between the rollers.

3. What types of roller crushers are there?

According to the number of rollers, they are divided into double-roller crushers and four-roller crushers. The double-roller crusher is suitable for medium and fine crushing, while the four-roller crusher is suitable for fine and ultra-fine crushing.

4. What is the processing capacity of a roller crusher?

The processing capacity is 5-110 t/h, depending on the model. 2PG0425 is 5-10 t/h, 2PG1280 is 60-110 t/h.

5. What is the feed size of a roller crusher?

The feed size is ≤25mm or ≤30mm, depending on the model. 2PG0425 to 2PG0850 is ≤25mm, 2PG1060 to 2PG1280 is ≤30mm.

6. What is the motor power of a roller crusher?

The motor power is 5.5×2 to 110×2 kW, using dual motor drive, depending on the model.

7. How is the discharge particle size of a double roller crusher adjusted?

By adjusting the gap between the two rollers, the size of the discharge port can be controlled. The discharge port can be adjusted within a range of 2-8mm or 2-10mm, and it can be adjusted according to the required product particle size.

8. What materials is a double roller crusher suitable for?

It is suitable for brittle and tough materials such as cement clinker, limestone, ores, coke, coal, and chemical raw materials.

9. What are the wear parts of a double roller crusher?

Roller skins, bearings, drive gears, etc., among which the roller skins are the main wear parts. It is recommended to use high manganese steel or high chrome cast iron.

10. Does a double roller crusher need a foundation?

Yes. It needs to be installed on a solid concrete foundation, which must bear the weight of the equipment and the huge impact load during crushing operations, and be fixed with anchor bolts.

11. What are common faults of a double roller crusher?

Roller skin wear (due to strong abrasiveness of materials), bearing overheating (poor lubrication or overload), belt slack or breakage (insufficient tension), abnormal vibration (uneven rollers or foreign object blockage), and discharge port blockage (uneven feeding or too small discharge port).

12. Can a double roller crusher be used in the cement industry?

Yes, it is suitable for crushing cement clinker and limestone, with adjustable discharge particle size and stable operation.

13. Can a double roller crusher be used in the coal industry?

Yes, it is suitable for crushing coal, coal gangue, and the preprocessing stage of artificial sand making, with controllable discharge particle size and good particle shape.

14. What is the difference between a double roller crusher and a hammer crusher?

A double roller crusher crushes materials by squeezing and grinding them between two counter-rotating rollers. It is suitable for brittle and tough materials, has adjustable discharge particle size, low operating cost, but relatively smaller capacity. A hammer crusher crushes materials with high-speed rotating hammers, suitable for medium-hard materials, with a large crushing ratio and high output, but the hammers wear quickly.

15. Can a double roller crusher be customized?

Yes, motor power, roller skin material (high manganese steel/high chrome cast iron/alloy steel), motor configuration (explosion-proof motor), dust removal system, central control system, variable frequency speed regulation, and other features can be customized.

16. How to maintain and care for a double roller crusher?

Regularly check the rollers for wear and replace or adjust them in time; regularly check the bearing lubrication and add or replace grease as needed; regularly check the belt tension; regularly check whether the foundation bolts and connecting bolts are loose; regularly clean accumulated materials and foreign objects in the crushing chamber.

17. What is the crushing ratio of a double roller crusher?

The crushing ratio of a double roller crusher is usually 3-8, depending on the hardness of the material and the adjustment range of the discharge port. It can crush materials of ≤25-≤30mm to 2-10mm.

18. Does the double roller crusher comply with RoHS and REACH?

Standard equipment complies with RoHS and REACH regulations and does not contain SVHC (Substances of Very High Concern). Refer to the product test report for details.

19. What is the difference between double-roller and four-roller crushers?

Double roller crushers are suitable for medium and fine crushing with relatively larger capacity; four-roller crushers are suitable for fine and ultra-fine crushing, producing finer final particle sizes and allowing two-stage crushing.

20. How to choose the model of a double roller crusher?

Determine suitability according to the material characteristics, choose the model corresponding to ≤25mm or ≤30mm according to the feed size, confirm the 2-8mm or 2-10mm adjustment range according to discharge port requirements, select the model within the 5-110t/h range according to production line capacity, and choose a motor from 5.5×2 to 110×2kW according to processing capacity.

Technical FAQ

What data should I send for a crusher quotation?

Provide material type, maximum feed size, capacity, required product size, moisture, working hours and the upstream and downstream equipment.

How do I compare two crusher models?

Compare the same duty point: capacity, feed opening, discharge range, motor power, wear-part life, maintenance access and total operating cost.

Authoritative references

For standards and safety context, see ISO standards and the U.S. Mine Safety and Health Administration. Confirm the exact local requirements for your project.

Long-tail keywords: roller crusher, crushing equipment selection, mining machinery RFQ, mineral processing equipment supplier