Raw Material Screening
A screening machine that classifies cement raw materials by particle size. Feed size up to 400mm with capacities of 8-800 m3/h. Available in linear, circular, and banana configurations — separating oversize from correctly sized material with high efficiency and reliable operation.
Product Overview
The vibrating screen is a classification machine used in cement plants to separate raw materials by particle size. After crushing, limestone, coal, clinker, and other materials consist of particles ranging from fine dust to large lumps. The vibrating screen uses a vibrating screen deck with mesh openings of a specific size — particles smaller than the mesh opening pass through (undersize), while larger particles are retained and discharged (oversize) for further crushing or rejection.
In a cement plant, vibrating screens are used at multiple stages: after primary crushing to separate oversized limestone for re-crushing, before the raw mill to ensure feed is within the mill's acceptable size range, for coal screening before the coal mill, and before the cement mill to screen clinker. Proper screening protects downstream equipment from oversized material, improves mill efficiency, and ensures consistent product quality.
LIMING vibrating screens are available in three configurations — linear, circular, and banana — to suit different screening tasks, feed sizes, and capacity requirements. All designs feature robust vibration motors, wear-resistant screen meshes (polyurethane or manganese steel), and sealed dust-tight construction for clean, efficient operation.
Classification
Each type is suited to a specific screening application and material size range.
Uses two counter-rotating vibration motors to create a straight-line (linear) motion. Material moves forward in a straight line along the screen deck. Ideal for fine screening, dewatering, and classification of medium to fine materials. Common before raw mills and cement mills for precise size control.
Uses a single eccentric shaft to create circular (elliptical) motion. The circular motion tosses material upward and forward, promoting stratification. Best for coarse primary screening of large feed material (up to 400mm). Used after primary crushers to separate oversized limestone.
Features a deck with multiple angles — steep at the feed end (for rapid material movement) and progressively shallower toward discharge (for precise screening). Achieves high capacity with efficient stratification. Ideal for large-capacity plants requiring high throughput screening of medium to fine materials.
Key Benefits
Engineered for high screening efficiency, reliable operation, and low maintenance in cement plant environments.
The vibrating motion promotes rapid particle stratification — fine particles migrate to the bottom and pass through the mesh, while coarse particles stay on top. Multi-deck designs allow simultaneous separation into multiple size fractions, achieving screening efficiency of 90-98%.
Vibration motors are precisely balanced and isolated with rubber springs or dampers, minimizing vibration transmission to the supporting structure. Noise levels are kept below 85 dB — meeting industrial workplace noise standards for comfortable, safe operation.
Screen meshes are available in polyurethane (for abrasive materials, 3-6 months life) or manganese steel (for high-temperature clinker). Modular mesh panels allow quick replacement without dismantling the screen. This minimizes downtime and maintains screening performance.
Sealed screen box with dust covers prevents fugitive dust emission — critical for cement plant environmental compliance. Robust construction with heavy-duty bearings and vibration motors ensures reliable continuous operation in harsh, dusty environments.
Technical Data
Representative models. Custom deck configurations and mesh sizes available for your specific application.
| Model | Type | Screen Size (mm) | Feed Size (mm) | Capacity (m³/h) | Deck Layers | Motor Power (kW) |
|---|---|---|---|---|---|---|
| VS-0918 | Circular | 900 × 1,800 | ≤100 | 8-20 | 1-2 | 1.5 |
| VS-1230 | Circular | 1,200 × 3,000 | ≤200 | 20-60 | 1-2 | 3.0 |
| VS-1536 | Circular | 1,500 × 3,600 | ≤300 | 40-100 | 1-2 | 5.5 |
| VS-1842 | Circular | 1,800 × 4,200 | ≤400 | 60-150 | 1-2 | 7.5 |
| LVS-1230 | Linear | 1,200 × 3,000 | ≤50 | 15-40 | 1-3 | 2 × 1.5 |
| LVS-1536 | Linear | 1,500 × 3,600 | ≤50 | 30-80 | 1-3 | 2 × 2.2 |
| LVS-1848 | Linear | 1,800 × 4,800 | ≤80 | 50-120 | 1-3 | 2 × 3.0 |
| LVS-2460 | Linear | 2,400 × 6,000 | ≤80 | 80-200 | 1-3 | 2 × 5.5 |
| BVS-2460 | Banana | 2,400 × 6,000 | ≤200 | 200-400 | 1-2 | 2 × 7.5 |
| BVS-3060 | Banana | 3,000 × 6,000 | ≤300 | 300-600 | 1-2 | 2 × 11 |
| BVS-3672 | Banana | 3,600 × 7,200 | ≤400 | 400-800 | 1-2 | 2 × 15 |
* Specifications are for reference only. Actual capacity depends on material type, bulk density, moisture, and mesh size. Custom screen sizes and deck configurations available — contact LIMING for sizing.
How It Works
The vibrating screen uses vibration to stratify and separate particles by size. The screen deck vibrates at high frequency, causing particles to bounce and rearrange — fine particles move to the bottom and pass through the mesh, while coarse particles stay on top and move toward discharge.
Frequently Asked Questions