Common Equipment for Granite Processing and Their Functions
Granite, known for its high hardness (Mohs hardness 6–7) and excellent stability, is widely used in construction. Its processing requires specialized equipment to ensure efficient crushing, sand production, and deep processing. This article provides a comprehensive overview of granite processing equipment across four categories: crushing, sand making, deep processing, and auxiliary systems.
I. Crushing Equipment: The Core Processing Stage
Crushing equipment is used to reduce large granite blocks (typically over 500mm in diameter) into smaller sizes. The process involves multiple stages, generally divided into primary (coarse) and secondary (fine) crushing.
1. Primary Crushing: Jaw Crusher
- Function: The first step in granite crushing, responsible for reducing raw stone to below 100mm through compressive and shearing action between the jaw plates.
- Recommended Models: JC Series European Jaw Crusher, German-type Jaw Crusher (superior strength and durability compared to standard models).
- Application: Initial processing after mining, often paired with a vibrating feeder to ensure even material feed.
2. Secondary and Tertiary Crushing Equipment
(1) Cone Crusher
- Crushing Principle: Compression and grinding between the moving and fixed cones.
- Types: Full hydraulic, multi-cylinder hydraulic, and single-cylinder hydraulic cone crushers.
- Output Size: ≤30mm
- Key Advantages: High efficiency, low wear, ideal for secondary crushing of hard materials like granite.
(2) Impact Crusher
- Crushing Principle: High-speed hammer impact combined with liner plate rebound.
- Output Size: Medium particle sizes
- Key Advantages: Produces cubical-shaped finished products; ideal for applications requiring high-quality particle shape.
Suhman SF‑380D Crawler-Type Mobile Impact Crusher
This is a fully mobile impact crusher integrated on tracks (crawler chassis), ideal for direct deployment at quarry or site.
- Crushing Capability: Handles feed up to 500–600 mm and compressive strengths ≤150 MPa—suitable for granite coarse breakage
- Power & Throughput: Powered by heavy-duty rotor, wear-resistant materials, large crushing chamber; processes 150–180 t/h with total work power ~283 kW
- Integrated Workflow: Combines feeding hopper, vibrating feeder, crusher, conveyors, screening—ready for plug-and-crush operation
- Mobility: Track chassis (LDZ55-3657); full machine weighs 51 t. Transport dimensions approx. 17.65 × 3.5 × 3.9 m, working height 4 m
(3) Hammer Crusher
- Crushing Principle: High-speed hammer striking.
- Output Size: ≤35mm
- Key Advantages: High crushing ratio; suitable for both primary and secondary crushing.
II. Sand Making Equipment: Aggregate Shaping and Sand Production
To meet the demand for construction sand, crushed granite needs to be further processed into 0–5mm or 0–8mm sand. The main equipment for this is the Vertical Shaft Impact Crusher (VSI).
- Function: Uses a high-speed rotor to throw material against impact plates for shaping and fine crushing. Produces up to 98% cubical particles with low dust content.
- Application: Ideal for concrete aggregate production in roads, railways, and real estate; typically used with vibrating screens to control particle size.
III. Auxiliary & Integrated Equipment
1. Mobile Crushing Plant
- Function: Integrates feeder, jaw/cone crusher, and conveyor into a mobile unit, enabling on-site crushing.
- Output Capacity: 85–650 tons per hour
- Advantages: Flexible for various applications such as quarrying or construction waste recycling; reduces material transportation costs.
2. Other Auxiliary Equipment
- Vibrating Feeder: Ensures even material feed and prevents crusher overload.
- Vibrating Screen: Separates materials by size for consistent product gradation.
- Belt Conveyor: Connects each machine in the line for continuous operation.
IV. Equipment Selection Recommendations
1. Based on Processing Goals:
- For Sand and Aggregates: Jaw Crusher + Cone Crusher + VSI Sand Maker + Vibrating Screen
- For Granite Slab Processing: Multi-blade Saw + Infrared Bridge Cutting Machine + Flame Surface Machine
- For Mobile Operations: Mobile Crushing Plant (integrated coarse and fine crushing units)
2. Key Considerations:
- Material Hardness: Granite’s high hardness requires wear-resistant components.
- Capacity Requirements: Ranges from 85 to 650 tons/hour.
- Desired Product Size: For example, 0–5mm sand requires vertical shaft impact crushing.
