300 T/H Granite Crushing Solution
A detailed technical solution for a 300-ton/hour granite tracked mobile crushing plant was developed based on the client's needs.
Project Core Parameters
• Equipment Type: Tracked Mobile Crushing and Screening Plant
• Design Processing Capacity: ≥300 tons/hour
• Feed Material: Granite (compressive strength typically 100-250MPa, high abrasiveness)
• Finished Product Specifications: 0-5mm, 5-10mm, 10-20mm, 20-31.5mm
• Application Scenarios: Large-scale stone quarries, mining operations, large-scale infrastructure construction (such as highways, railways, and water conservancy projects), and urban construction waste recycling (concrete processing, etc.) projects with high requirements for capacity and mobility.
Recommended Configuration
Considering the high hardness and abrasiveness of granite, as well as the requirement for multiple finished product specifications, a closed-loop configuration of two-stage crushing + multi-stage screening is recommended to ensure capacity, finished product particle shape, and wear-resistant component life. A typical "one jaw, one cone" mobile station combination is the optimal choice. Configuration 1: Main Production Line
1. Tracked Mobile Jaw Crusher
◦ Model: Large mobile jaw crusher (e.g., CJ series, J series, etc.)
◦ Core Equipment: Heavy-duty jaw crusher
◦ Feed Inlet Size: ≥1000×750mm
◦ Function: As a coarse crusher, it accepts large pieces of raw ore (maximum particle size up to approximately 650mm) from excavators or dump trucks and crushes them to ≤250mm intermediate material. Its robust structure makes it a crucial first-stage crusher for processing hard granite.
2. Tracked Mobile Cone Crusher
◦ Model: Multi-cylinder hydraulic cone crusher mobile station (e.g., HP series, CH series, etc.)
◦ Core Equipment: Fully hydraulic multi-cylinder cone crusher
◦ Function: As a medium and fine crusher. It accepts pre-crushed material from the jaw crusher for secondary crushing. Multi-cylinder hydraulic cone crushers are particularly suitable for crushing granite because their layered crushing principle produces better particle shape. Furthermore, hydraulic adjustment of the discharge port and iron overload protection ensure stable production of aggregates of the required specifications, and the wear parts have a relatively long service life.
3. Tracked Mobile Screening Station (with Return Material System)
◦ Model: Large Multi-Layer Screening Station
◦ Core Equipment: 2-3 large three- or four-layer heavy-duty vibrating screens
◦ Screen Configuration: Four-layer screens are recommended. Screen aperture sizes from top to bottom can be set as follows: 31.5mm, 20mm, 10mm, 5mm.
◦ Core Equipment:
▪ Screens the cone crusher output, directly separating three finished products: 20-31.5mm, 10-20mm, and 5-10mm.
▪ Screens out materials <5mm as 0-5mm finished products (or further shapes them).
▪ Material >31.5mm (oversize) is returned to the cone crusher via a return conveyor belt, forming a closed-loop cycle to ensure stable production capacity and particle size.
Configuration Two (Optimized/Alternative Solution)
If higher requirements are placed on the particle shape and gradation of 0-5mm manufactured sand (to replace natural sand), the following can be added after the screening station:
4. Tracked Mobile Vertical Shaft Impact Crusher (Sand Making Machine)
◦ Function: Accepts some intermediate-sized materials (e.g., 10-20mm) for shaping and sand making, producing high-quality manufactured sand (0-5mm), improving particle shape and modulus.
Detailed Workflow Explanation
300 T/H Granite Crushing Solution
Workflow Steps:
1. Feeding and Coarse Crushing: An excavator or loader feeds granite rough (maximum block size approximately 650mm) into the feeder of the tracked mobile jaw crusher station. 1. Primary Crushing: The vibrating feeder uniformly and controllably feeds material into the heavy-duty jaw crusher for primary crushing, producing primary crushed material with a particle size ≤250mm.
2. Secondary Crushing and Transfer: The primary crushed material is conveyed via a discharge conveyor (conveyor No. 1) to the receiving hopper/feeder of the tracked mobile cone crusher, and then enters the multi-cylinder hydraulic cone crusher for medium and fine crushing. This is the core step in controlling the final product particle size.
3. Screening and Grading: The cone crusher discharge is conveyed via a discharge conveyor (conveyor No. 2) to the top vibrating screen of the tracked mobile screening station. The material is stratified on the screen surface.
4. Finished Product Output and Closed-Loop Circulation:
◦ Qualified Finished Product: The four specifications of material screened out (0-5mm, 5-10mm, 10-20mm, and 20-31.5mm) are respectively conveyed to different finished product stockpiles via their respective discharge conveyors.
◦ Return Material: Material larger than 31.5mm (non-compliant large particles) is returned to the cone crusher's feed inlet via a return conveyor belt for further crushing, forming a closed-loop cycle. This is crucial for ensuring output and particle size compliance.
5. (Optional) Mechanized Sand Shaping: If optimizing 0-5mm sand is required, some 5-10mm or 10-20mm intermediate material can be introduced into a tracked mobile sand making machine via a conveyor belt for shaping, followed by screening to obtain high-quality manufactured sand.
Advantages and Precautions
• Advantages:
◦ Mobile and Flexible: Tracked movement adapts to complex sites, allowing for local operation and reducing transportation costs.
◦ Rapid Deployment: Once the equipment arrives on site, connecting water and electricity quickly establishes a production line.
◦ High-Efficiency Closed-Loop: The closed-loop design maximizes production capacity and stabilizes finished product particle size.
• Excellent Finished Product: The combination of a jaw crusher and a cone crusher is the golden configuration for producing high-quality hard rock aggregate, resulting in good particle shape and fewer needle-like and flaky particles.
• Intelligent Control: Modern mobile crushing stations are equipped with PLC intelligent control systems, enabling one-button start/stop, remote monitoring, fault diagnosis, and easy operation.
• Key Considerations:
1. Wear-resistant Parts: Crushing granite results in high wear on jaw plates, jaw walls, and crushing walls. Ultra-wear-resistant materials (such as ceramic composites) must be selected, and spare parts should be stocked.
2. Power Supply: A single large mobile crushing station can have a power output of 200-400kW. The entire line requires a stable external power grid or a high-power generator set.
3. Site Layout: The location of equipment stations, material flow direction, and finished product stockpile should be rationally planned to shorten the conveyor belt length and improve efficiency.
4. Dust Removal System: It is recommended to equip key dust-generating points such as feeding, crushing, screening, and transfer with spray dust suppression or baghouse dust collection systems to meet environmental protection requirements.
This configuration of "tracked mobile jaw crusher + tracked mobile cone crusher + tracked mobile screening station" is a mature, efficient, and reliable solution for crushing 300t/h granite and producing high-quality stone of various specifications, perfectly balancing the needs of mobility, capacity and finished product quality.
About of Baichy Heavy Industry
Baichy Heavy Industry is a high-tech mining equipment company integrating R&D, manufacturing, sales, and after-sales service. Focusing on crushing, grinding, and mineral processing equipment, we provide professional solutions to our customers. We are ISO9001:2015 、certified, and our products include mobile crushing palnts, crawler crushing plant, construction waste crushing plants, jaw crushers, sand making machines, cone crushers, fine crushers, grinding mills, ball mills, etc., all with reliable performance to meet diverse project needs.
Our advantages:
• Professional pre-sales support: Free project design and comprehensive solutions to help you accurately select the right equipment;
• Comprehensive on-site service: Providing installation guidance and worker training to ensure smooth equipment commissioning;
• Reliable after-sales guarantee: A complete after-sales system, timely response to technical inquiries and equipment maintenance, ensuring long-term stable operation.
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