Coal mining stumps, often considered waste, can be repurposed into high-quality sand and aggregates through an efficient crushing and sand-making production line. This process not only reduces environmental impact but also creates economic value.
The production line typically includes:
1. Jaw Crusher: Primary crushing of stumps into 150-300mm fragments.
– Model: JC1200
– Feed Size: ≤800mm
– Capacity: 200-350t/h
– Power: 132kW
2. Impact Crusher: Secondary crushing to 30-50mm particles.
– Model: PF1315
– Rotor Diameter: 1300×1500mm
– Capacity: 100-180t/h
3. VSI Sand Maker: Produces 0-5mm machine-made sand.
– Model: VSI1140
– Throughput: 70-140t/h
– Max Feed Size: 50mm
4. Vibrating Screen: Multi-layer screening for grading.
Raw stumps → Jaw crusher (coarse crushing) → Impact crusher (medium/fine crushing) → Screening → VSI shaping → Finished sand/aggregates.
– Dust suppression systems reduce pollution
– Modular design allows flexible configuration
– Wear-resistant alloys extend equipment life by 40%
Q1: What’s the final product application?
A: Suitable for concrete batching (5-20mm aggregates) and dry-mix mortar (0-5mm sand).
Q2: How to handle high moisture content?
A: Add rotary dryer between crusher and screen when moisture >8%.
Shanxi Coal Waste Recycling Plant: Processes 500t/day of stumps into:
– Grade I sand (fineness modulus 2.6-3.0)
– 5-10mm/10-20mm aggregates meeting GB/T14685 standards
The complete line achieves 90% of raw materials.
