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Roller Screen: Industrial Powerhouse for Heavy-Duty Screening
Release time:
Apr 27,2025
Roller Screen: Industrial Powerhouse for Heavy-Duty Screening
1. Working Principle & Design
A roller screen consists of multiple parallel alloy steel rollers with star-shaped or disc-shaped surfaces. Driven by motors, the rollers rotate synchronously to separate materials through adjustable gaps (10-300mm).
Key Components:
- Rollers: Made of ZG50Mn2 or high-chrome iron (surface hardness ≥HRC55);
- Drive System: Gear motor + chain transmission with variable frequency control (3-15r/min);
- Gap Adjustment: Hydraulic/manual mechanism (±2mm precision).
2. Typical Applications
- Coal Mining:
- Pre-screening raw coal (separate +300mm gangue);
- Classify lump coal (+50mm) and fines (-50mm) at 2000t/h.
- Metal Mines:
- Remove oversize (+500mm) before primary crushing;
- Separate waste rock from ore with ≥85% efficiency.
- Construction Waste:
- Remove rebar/wood before crushing (95%+ purity);
- Screen concrete blocks (+200mm) at 500-800t/shift.
- Power Plants:
- Control coal size (+30mm) for efficient combustion;
- Recover unburned carbon from ash.
3. Core Advantages
|
Advantage |
Technical Detail |
Industry Value |
|
High Capacity |
500-3000t/h, 2-3x higher than vibrating screens |
Reduce equipment count, save 20%+ CAPEX |
|
Impact Resistance |
Handles ≤2t material drops without damage |
35% lower annual maintenance costs |
|
Harsh Environment |
Operates at -30°C to +150°C, dust/waterproof |
Ideal for open-pit mines and coal wash plants |
|
Energy Saving |
0.1-0.3kW·h per ton, 40% less than vibratory screens |
Save >$70k/year (3000t/h capacity) |
|
Longevity |
Roller lifespan ≥5 years, wear parts last 2-3 years |
60% lower lifecycle costs |
4. Selection Guide
- Step 1: Material Analysis
- Size: Max feed ≤1.5x roller diameter (e.g., Φ200mm roller handles ≤300mm material);
- Moisture: Add 3°-5° incline and spray nozzles if moisture >15%.
- Step 2: Roller Type
- Star Rollers: For sticky materials (e.g., coal slurry);
- Disc Rollers: For dry/hard materials (e.g., iron ore).
- Step 3: Drive Configuration
- Variable Frequency Drive (VFD): For fluctuating feed rates;
- Fixed Speed: Lower maintenance for stable operations.
Conclusion: Roller screens excel in large-particle, high-tonnage screening, making them ideal for coal, mining, and recycling industries.
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Luoyang Nairy Machinery Equipment Co., Ltd. (hereinafter referred to as Nairy) was founded in Luoyang, the Holy City of China. After years of innovation and development, Nairy products have made historic breakthroughs in the supply of sand and gravel system equipment and spare parts, the supply of belt conveyors, the research and development and supply of solid waste recycling equipment...
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