Double Roller Crusher
Double Roller Crusher – Low Over-Crushing Fine & Medium Roll Crushing Machine
Double Roller Crusher is a professional extrusion crushing equipment relying on double roller squeezing force. Different from impact crushing machines, it features extremely low over-crushing rate, uniform finished particle size and adjustable gap. It is the optimal equipment for medium-fine crushing and sand shaping of medium-soft ores, coal, limestone and quartz stone.
Simple & Compact Structure
Wear-Resistant Roller & Long Service Life
Automatic Overload Protection
What is Double Roller Crusher?
Double Roller Crusher, also known as double roll crusher, is a traditional mature extrusion-type crushing equipment. It adopts two relative rotating rollers to squeeze and crush materials, realizing selective crushing through pure mechanical pressure. This working method avoids excessive crushing caused by high-speed impact, effectively reducing powder content and keeping complete grain shape.
The double roller crusher is mainly used for medium and fine crushing of medium-hard and soft brittle materials such as coal, limestone, river stone, feldspar, quartz sand and gangue. With simple mechanical structure, flexible discharge gap adjustment, stable operation and low comprehensive failure rate, it is widely applied in coal mining, building materials, chemical industry and aggregate fine processing fields, becoming the preferred equipment for low-powder material crushing.
Contents
Advantages of Double Roller Crusher
Why Choose Our Double Roller Crusher
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Ultra-Low Over-Crushing & Low Powder Rate: Adopts double roller slow-speed extrusion crushing instead of high-speed impact crushing. Materials are crushed by natural extrusion along the texture, with extremely low fine powder content. The finished products have uniform particle size and complete grain shape, perfectly solving the excessive powder problem of impact crushers.
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Accurate Discharge Particle Size Control: Equipped with precise gap adjustment device between the two rollers. Users can freely adjust the discharge particle size according to production needs, realizing arbitrary switching between medium crushing, fine crushing and sand making, with high finished product precision.
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Simple & Compact Structure: The whole machine has a highly integrated modular design with fewer transmission components. The structure is compact, covering small floor space, convenient for on-site installation and transportation, suitable for both fixed stations and mobile crushing lines.
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Low Noise & Energy Saving: Low-speed roller operation avoids high-speed impact noise and violent vibration. The double roller crusher runs smoothly with low noise and low power consumption, meeting environmental protection production standards and reducing long-term power cost.
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Wear-Resistant Roller & Long Service Life: The roller surface adopts high-chromium alloy wear-resistant layer or high manganese steel integrated forging process. It has strong compression resistance and wear resistance, not easy to stick materials, effectively extending the service life of core components.
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Automatic Overload Protection: Equipped with spring buffer and hydraulic protection device. When uncrushable hard foreign matter enters the crushing cavity, the rollers automatically retract to release pressure and discharge impurities, protecting the main machine from damage and avoiding shutdown failure.
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Easy Maintenance & Low Operating Cost: Few vulnerable parts and standardized accessories. The roller surface can be repaired and reused, reducing replacement frequency. Daily maintenance only requires regular lubrication and surface cleaning, with low technical threshold and low comprehensive operating cost.
1.High-quality Wear-resistant Materials
The grinding rollers are reusable, with a low failure rate and longer service life.
2.Convenient Discharge Adjustment
Adjust the roller gap as needed to maintain stable operation.
1.Sealed Design for Greater Environmental Friendliness
Equipped with an internal dustproof plate, resulting in less dust and lower noise.
Applications of Double Roller Crusher
Main Application Fields of Double Roller Crusher
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Coal industry crushing and fine processing of raw coal, coal gangue and coal slime
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Building materials industry crushing of limestone, bluestone, feldspar, quartz stone and gypsum
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Fine sand making and particle shaping of river stone, pebble and medium-soft aggregates
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Chemical and metallurgy industry fine crushing of brittle industrial raw materials
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Construction waste recycling, concrete and brick material fine processing
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Small and medium-sized aggregate plants low-powder fine crushing production
Working Principle of Double Roller Crusher
When the double roller crusher is working, the two motors drive the fixed roller and movable roller to rotate synchronously in opposite directions through the transmission device. Bulk materials fall evenly into the middle of the two rollers from the top feeding hopper.
Under the action of roller rotation and friction force, materials are stably bitten into the crushing cavity, and squeezed, extruded and sheared by the two rollers. Brittle materials are crushed along their natural texture to form uniform particles. Qualified materials fall and discharge from the roller gap, while oversized materials stay in the cavity for secondary extrusion crushing. When uncrushable hard objects enter, the movable roller retracts automatically for pressure relief and impurity discharge, then resets to continue working, finally completing efficient and low-powder medium and fine crushing.
Structural Details & Industrial Build Quality of Double Roller Crusher
Double Roller Crusher Main Structure
The double roller crusher adopts mature symmetrical double-roller mechanical structure, mainly composed of frame assembly, fixed roller, movable roller, wear-resistant roller skin, gap adjustment device, spring hydraulic protection system, driving motor, transmission gear and feeding hopper. The reasonable structural layout ensures stable extrusion crushing performance and convenient daily maintenance of the equipment.
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Reinforced Heavy-Duty Frame: Integral welded steel frame with high overall rigidity and strong pressure resistance, effectively bearing the extrusion force generated by material crushing, avoiding frame deformation and ensuring long-term stable operation.
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Dual Symmetrical Crushing Rollers: Divided into fixed roller and movable roller, operating in opposite directions. The thickened wear-resistant roller skin ensures uniform material extrusion and crushing, avoiding material sticking and uneven discharging.
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Precision Gap Adjustment Mechanism: Adopts screw or hydraulic integrated adjustment structure, which can accurately control the gap between the two rollers, realizing precise adjustment of discharge particle size and meeting diverse production standards.
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Spring Hydraulic Buffer Protection System: The core safety component of the double roller crusher. When encountering hard foreign matters, the movable roller automatically retracts to release pressure, realizing safe overload protection and automatic reset.
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Stable Transmission Device: Matched with high-precision gear and belt transmission structure, ensuring synchronous and stable operation of the two rollers, uniform feeding and crushing, and no material blocking.
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Sealed Dust-Proof Structure: Adopts fully enclosed shell design to effectively restrain dust overflow during crushing, improving on-site working environment and meeting environmental protection requirements.
Core Differentiation (Toothed Roll vs Smooth Roll / Hammer Crusher)
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Smooth Double Roller Crusher: Pure extrusion crushing, small feeding size, easy to block when processing wet sticky materials, low output for bulk materials, suitable for fine crushing and sand making of dry medium-soft materials.
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Hammer Crusher: High-speed impact crushing, high powder rate, serious over-crushing, large material loss, suitable for general crushing but poor for lump material retention.
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Toothed Roll Crusher: Tooth shear & split crushing, large bulk feeding, anti-blocking for wet materials, ultra-low powder rate, high lump ore retention rate, specially customized for coarse and medium crushing of coal, gangue and various sticky soft materials.
Packing and Delivery of Double Roller Crusher
Based on good quality and decades of experience, the Double Roller Crusher which is manufactured by NJMINING was exported to different countries. The Double Roller Crusher will be packed and loaded in our factory, and then be shipped to our clients safe and sound.
Technical Parameters of Double Roller Crusher
Parameter Description: Our double roller crusher covers multiple mainstream models, meeting small, medium and large capacity fine crushing and sand making demands for medium-soft materials. Customized roller size and power configuration are available for special working conditions.
| Model | Roller Diameter (mm) | Roller Length (mm) | Feeding Size (mm) | Output Size (mm) | Capacity (t/h) | Motor Power (kw) |
| 2GP-400X250 | 400 | 250 | ≤ 25 | 1-8 | 5-10 | 5.5*2 |
| 2GP-500X450 | 500 | 450 | ≤ 30 | 1-15 | 10-20 | 11*2 |
| 2GP-610X400 | 610 | 400 | ≤ 40 | 1-20 | 13-35 | 15*2 |
| 2GP-750X500 | 750 | 500 | ≤ 40 | 2-20 | 15-40 | 18.5*2 |
| 2GP-800X600 | 800 | 600 | ≤ 40 | 3-20 | 20-50 | 22*2 |
| 2GP-1000X500 | 1000 | 500 | ≤ 120 | 3-20 | 30-60 | 37*2 |
| 2GP-1100X600 | 1100 | 600 | ≤ 150 | 3-20 | 50-80 | 37*2 |
| 2GP-1000X1000 | 1000 | 1000 | ≤ 120 | 3-20 | 60-80 | 45*2 |
Application Cases of Double Roller Crusher
Our double roller crushers are widely used in global coal mines, aggregate processing plants and building material production lines. Relying on stable extrusion crushing performance, ultra-low powder rate and simple maintenance advantages, the equipment can operate continuously for a long time aiming at medium-soft brittle materials. Mass overseas engineering cases prove its uniform discharging, low energy consumption and high cost performance, winning long-term trust from customers.
FAQs of Double Roller Crusher
Q1: What materials is the toothed roll crusher suitable for?
A1: The toothed roll crusher is professionally used for medium-soft and sticky bulk materials, including raw coal, coal gangue, shale, clay, limestone, weathered stone and high-moisture industrial materials. It is the best choice for coal and brick making production lines.
Q2: What is the difference between toothed roll and smooth roll crusher?
A2: Toothed roll crusher adopts tooth shear crushing with large feeding size and anti-blocking function, suitable for coarse/medium crushing of bulk wet materials. Smooth roll crusher uses pure extrusion crushing, suitable for fine crushing and sand making of dry materials with smaller feeding size.
Q3: Can the toothed roll crusher process wet and sticky materials?
A3: Yes. The optimized staggered tooth structure effectively avoids material adhesion and accumulation. It can stably crush high-moisture wet coal, clay and other sticky materials without blocking, which solves the core pain point of ordinary crushers.
Q4: Does the toothed roller crusher produce much powder?
A4: No. It adopts shear splitting crushing instead of high-speed impact, with extremely low over-crushing rate. The finished products are mainly uniform blocks with few fine powders, greatly improving the utilization rate of lump materials.
Q5: Is the tooth roller easy to wear and replace?
A5: The roller teeth are made of high-strength wear-resistant alloy with long service life. The modular tooth structure supports partial single-tooth replacement, no need to replace the whole roller, which saves maintenance time and spare part cost.
Q6: Is the discharge particle size adjustable?
A6: Yes. Equipped with precise gap adjustment device, users can freely adjust the discharge gap to switch between coarse crushing and medium crushing modes, meeting different particle size requirements.
Q7: What working scenarios are exclusive for toothed roll crusher?
A7: It is exclusively suitable for coal washing plant raw coal processing, brick factory clay crushing, wet sticky material pretreatment, bulk soft stone primary crushing and large-output low-powder block material production projects.
