The double-roll crusher demonstrates exceptional performance in coal crushing applications, with its advantages primarily manifested in precise particle size control, low energy consumption, low over-crushing rates, and ease of operation and maintenance. The following analysis systematically examines its core advantages, technical parameters, applicable scenarios, and real-world case studies:
The double-roll crusher
1. Core Crushing Performance Advantages
Uniform and Controllable Particle Size
Precise Adjustment:
By adjusting the roller gap via a hydraulic or spring system (typically 1–20 mm), the output particle size can be precisely controlled between 50 μm and 20 mm, meeting diverse combustion or processing requirements (e.g., power plants requiring coal fines ≤3 mm)
Low over-crushing rate:
The compression crushing principle reduces powder generation (the proportion of fine powder <0–5 mm is 30%–50% lower than that of impact crushers), preserving the coal’s block structure, enhancing combustion efficiency, and reducing dust pollution.
High efficiency and energy savings
Increased production capacity:
The optimized double-roll crusher achieves a 30%–40% higher production capacity than traditional equipment while reducing energy consumption by 20%–30%.
Adaptable to sticky materials:
The wolf tooth roller design can process raw coal containing moisture or impurities, with strong anti-blocking performance
Simplified pre-processing workflow
Raw coal only requires iron and impurity removal, without prior gangue removal. Direct crushing yields uniform particles, reducing the complexity and cost of coal preparation processes
Environmental protection and low noise
Sealed structure + dust-proof plate design reduces dust emissions by 40%–60%; operating noise ≤75 dB (can be reduced to below 65 dB with a soundproof enclosure), meeting industrial environmental protection standards
2、Key performance parameters and model recommendations
| Model | Production capacity (t/h) | Feed particle size (mm) | Discharge particle size (mm) | Application Scenarios | Features |
| Laboratory grade (CPZ series) | 0.2–2 | ≤13 | 1–3 adjustable | Laboratory coke and coal sample fine crushing
|
Compact structure, dust removal interface, high precision |
| Small (2PGT400×250) | 7–15 | ≤80 | 2–10 adjustable | Municipal sporadic repairs, small coal mines
|
Flexible movement, small footprint |
| Medium (2PGY800×600) | 50–80 | ≤100 | 3–20 adjustable | Fixed plant mixing, medium-sized coal preparation plants
|
Hydraulic adjustment, 30% energy savings |
| Large (2PGY1800×1000) | 300–400 | ≤130 | 5–30 adjustable | Large coal mines, coking plants
|
One-button start/stop, automated control, wear-resistant roller skin with 2-year service life |
Note: The Huashengming 1212 model can be customized to produce output particle sizes ≤3mm, specifically designed for high-precision requirements.
3. Key measures for improving efficiency
Optimize roller spacing:
Reducing the gap can achieve finer particle size, but overload must be avoided (recommended to be used in conjunction with an intelligent monitoring system)
Pre-screening of feed material:
Removing oversized particles (>130 mm) or impurities improves crushing uniformity
Controlling feed rate:
Constant feed rate prevents blockages and ensures adequate compression crushing
Regular maintenance: Tighten bolts every 3 months, clean bearings annually, and replace worn roll liners (high-chromium manganese steel extends service life by 2 times)
4. Application scenarios and economic analysis
Coal combustion/power generation: Fine coal with a particle size ≤3 mm improves combustion efficiency by 20% and reduces sulfur emissions
Coking industry: The double-tooth roller crusher achieves an over-crushing rate <10% when processing coke, reducing coke powder loss
Economic analysis: Equipment investment ranges from tens of thousands to millions, but operating costs are 40% lower than jaw crushers, with a payback period ≤1.5 years
Typical Case: A coal mine adopted the Huashengming 1212 double-roll crusher to crush coal to 3mm for power plant use, increasing production capacity by 35% and saving over 500,000 yuan in annual energy costs
Summary
Double-roll crushers, with their precise controllable particle size, low energy consumption, high wear resistance, and simplified pre-processing workflow, have become the ideal equipment for coal crushing. Double-tooth roller models (such as the Huashengming series) excel in processing sticky raw coal, while hydraulic intelligent control systems further enhance efficiency and stability. Selection should be based on production capacity requirements (from small-scale 7 t/h to large-scale 400 t/h) and particle size specifications (1–30 mm), with regular maintenance emphasized to ensure long-term efficient operation.
