Combined Mobile Crushing Plant for Granite
I. Why Granite Requires a Combined Mobile Crushing System
With a Mohs hardness of 6–7, compressive strength of 100–250 MPa, and density of 2.63–2.75 g/cm³, granite is widely recognized in the aggregate industry as a rock type characterized by high hardness and high abrasiveness. Processing granite using a single machine for the entire reduction process is neither practical nor economical; primary crushing requires a jaw crusher capable of gripping large boulders, while shaping relies on the high-speed impact of an impact crusher to achieve a cubical particle shape.
The combined mobile crushing system is a two-stage hard-rock solution designed specifically for these requirements: a wheeled mobile jaw crusher unit (integrating a feeder, jaw crusher, and conveyor) handles primary crushing, while a wheeled mobile impact crusher unit (integrating an impact crusher, vibrating screen, and closed-circuit material return system) performs secondary crushing and shaping. Positioned sequentially, these two units form a complete mobile crushing and screening production line that moves with the quarry face or between job sites; it requires no concrete foundation and can be put into operation within hours.
II. Process Configuration and Working Principle
The process logic of this combined mobile crushing system involves a three-stage sequence—primary crushing and separation, secondary crushing and shaping, and closed-circuit classification—with the two units linked for coordinated operation via a conveyor belt.
Modular mobile crushing station
Loader feeding → ZSW vibrating feeder (uniform feeding) → Jaw crusher (primary crushing to 150–200 mm) → Conveyor transport → Impact crusher (secondary crushing and shaping) → Vibrating screen (classification) → Finished products (0–5, 5–10, 10–20, 20–40 mm) → Oversized material (closed-circuit return to impact crusher for re-crushing). Combination Configuration and Key Parameters
| Configuration | Stage 1: Wheeled Mobile Jaw Crushing Station | Stage 2: Wheeled Mobile Impact Crushing Station | Max. Feed Size | Combined Capacity (t/h) |
|---|---|---|---|---|
| Small | YDPZ57-8530 (ZSW8530 + PE500×750, 40–130 t/h) | YDPZ1210-1548 (PF1210 + 3YK1548, 70–130 t/h, 90kW) | ≤425mm | 40–100 |
| Standard | YDPZ69-9638 (ZSW9638 + PE600×900, 90–180 t/h) | YDPZ1214-1860 (PFW1214 + 3YK1860, 100–180 t/h, 132kW) | ≤500mm | 80–150 |
| Large | YDPZ75-1142 (ZSW1142 + PE750×1060, 110–380 t/h) | YDPZ1315-2160 (PFW1315 + 3YK2160, 130–220 t/h, 200kW) | ≤630mm | 130–250 |
*Output varies with material hardness, feed size and crusher settings. For granite, estimate actual capacity at 85–90% of rated values.
III. Application Scenarios
In the following four scenarios, the "crush-on-the-go" capability of the combined mobile crusher translates directly into advantages regarding project timelines and costs:
1. Quarries and Mines: Combined mobile crushers can be positioned close to the blasting face, shortening haulage distances for mining trucks. The entire unit can be relocated as the working face advances, avoiding the sunk costs associated with fixed lines becoming obsolete once the ore is depleted.
2. Infrastructure for highways, railways, and hydropower stations: Strict requirements exist for aggregate particle shape and gradation; impact crushers produce cubic aggregates that meet these standards directly. Upon project completion, the entire processing line can be relocated to the next contract section, preserving the equipment's residual value.
3. Construction waste and granite scrap recycling: Wheeled mobility allows for operation in confined urban spaces, enabling the conversion of waste materials into recycled aggregates using a single processing line.
4. Multi-site rotation model: A single mobile processing line rotates between 3–5 sites; billing based on "cost-per-ton" significantly reduces capital tied up in equipment compared to purchasing multiple sets of stationary machinery.
IV. Equipment Advantages (Translating Specifications into Profitability)
1. Foundation-free and rapid deployment: Features hydraulic leveling legs and folding conveyors; production can begin just 4–6 hours after arrival, eliminating the 20–45 day civil engineering period required for stationary lines and accelerating the return on investment.
2. Flexible relocation and logistics: With a chassis width of 2.3–2.9m, the unit can be towed on public roads via semi-trailer; relocation costs are a mere fraction of the expense involved in dismantling and rebuilding stationary lines.
3. Superior particle shape and high yield: High-speed impact from the impact crusher rotor causes material to fracture along natural cleavage planes, resulting in a high proportion of cubic particles and low content of elongated or flaky particles, thereby commanding a higher market price.
4. Closed-loop circulation and stable gradation: Oversized material is automatically returned to the impact crusher, ensuring better yield and gradation stability compared to open-circuit systems.
5. Controllable energy consumption: Direct motor drive (e.g., YDPZ1214-1860 with a total installed power of 132kW); electricity costs are over 40% lower than diesel-powered units of equivalent capacity; customizable for local power standards (380V/400V/440V/60Hz).
6. Quick replacement of wear parts: Hydraulic opening of the impact crusher housing allows blow bars to be replaced in just half a day, maximizing continuous production uptime.
V. Relevant Case Study: 200 tph Mobile Granite Crushing Station in Russia
Baichy delivered a 200 tph mobile granite crushing station to a remote quarry in Russia. The setup features a YDPZ75-1142 mobile jaw crusher (PE750×1060) for primary crushing, a mobile cone crusher for secondary crushing, and a YDPZ1315-2160 mobile impact crusher (PFW1315) for fine crushing and shaping. It produces five types of finished products—0–5mm, 5–10mm, 10–20mm, 20–31.5mm aggregates, and manufactured sand—meeting the requirements for high-strength concrete and infrastructure projects. The extreme cold and remote location made the mobile solution the only viable option; the equipment moves alongside the quarry face, significantly reducing haulage costs while consistently achieving the designed capacity of 200 t/h. For details, please refer to the Russian granite mobile crushing station case study.
A 100 tph mobile crushing station in Mexico and a 200 tph mobile impact crushing station in Saudi Arabia also utilize wheeled configurations, demonstrating the versatility of this solution in the hard-rock markets of Latin America and the Middle East.
VI. Recommended Equipment
1. Mobile Cone Crushing Station (YDPZ300-2160 / CS160): Replaces the impact crusher with a cone crusher for the secondary stage when higher capacity and lower wear costs are required; ideal for large-scale aggregate production.
2. Mobile VSI Sand-Making Station: Installed after the impact crusher, the VSI shapes 5–10mm material into high-quality manufactured sand, meeting standards for high-grade concrete.
3. Wheel-Bucket Sand Washer (XSD) and Fine Sand Recovery Machine: Used to wash 0–5mm sand, remove silt and fines, and increase the market value of the finished sand.
4. ZSW Vibrating Feeder: Features pre-screening capabilities to remove fines and soil, thereby reducing the load on the jaw crusher and improving the efficiency of the entire production line.
Modular mobile crushing station on-site
VII. FAQ
1. Why is a "mobile jaw crusher + mobile impact crusher" combination recommended for granite processing, rather than a "mobile jaw crusher + mobile cone crusher"?
The jaw crusher is indispensable for gripping and performing primary crushing on large, hard rock fragments, serving as the first stage of the mobile crushing combination. The choice for the second stage depends on the desired product characteristics: the impact crusher produces cubical particles with a low content of flaky or elongated pieces, and it offers both shaping and sand-making capabilities, making it suitable for highway aggregates and perse market needs. However, if the goal is large-scale aggregate production (exceeding 200 t/h) and lower wear costs per ton, a cone crusher configuration is recommended. When processing granite, the impact crusher's blow bars should be made of high-chromium material and undergo regular inspections.
2. How long does it take for the mobile crushing combination to go from arrival on-site to full production?
No concrete foundation is required; after leveling with hydraulic legs, unfolding the conveyors, and completing electrical connections, the unit can usually undergo a no-load test run within 4–6 hours and reach full production capacity in 1–2 days. This significantly shortens the investment payback period compared to the 20–45 day civil engineering and installation cycle required for fixed crushing lines.
3. How do I select the right combination specifications based on production output?
First, determine the target capacity and maximum feed size. Then, follow these three steps to select the mobile crushing combination: for a feed size ≤425 mm and capacity of 40–100 t/h, choose the small combination (PE500×750 + PF1210); for ≤500 mm and 80–150 t/h, choose the standard combination (PE600×900 + PFW1214); and for ≤630 mm and 130–250 t/h, choose the large combination (PE750×1060 + PFW1315). Given the high hardness of granite, it is recommended to allow for a 10–15% capacity margin.
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.
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