Modular Crushing Station with Heavy-Duty Jaw Crusher
The modular crushing station represents a third category of equipment, positioned between fixed production lines and mobile crushing stations. It utilizes steel structural modules that are pre-assembled in the factory and bolted together on-site, eliminating the need for massive concrete foundations; this allows for commissioning within 30–45 days and requires only 3–7 days of downtime for relocation. The primary crushing stage relies on a heavy-duty jaw crusher as its core component. Since the station sits on a leveled, hardened surface rather than a cast-in-place foundation, the steel module frame must absorb all impact loads; consequently, the primary crusher must be a heavy-duty jaw crusher (such as the C-series) featuring a weld-free modular frame to simultaneously meet high-throughput demands and low foundation requirements.
I. Modular Crushing Station: A Third Category Between Fixed Lines and Mobile Stations
It is neither a "cheap fixed line" nor a "mobile station assembled on-site." Fixed crushing stations require pouring concrete foundations and on-site welding of steel structures, involving a combined civil engineering and installation period of 3–6 months. Mobile stations mount the entire unit onto a wheeled or tracked chassis, allowing for material output within 24 hours of arrival, though chassis load limits restrict the size of the crusher and the maximum production capacity. Modular crushing stations take a middle path: feeding, primary crushing, secondary/tertiary crushing, screening, conveying, and electrical control modules are all prefabricated and pre-commissioned in the factory. On-site work is limited to site leveling and hardening, module hoisting, and bolted assembly, thereby eliminating the need for large cast-in-place foundations or on-site welding.
| Comparison Dimension | Stationary Crushing Station | Modular Crushing Station | Mobile Crushing Station |
|---|---|---|---|
| Structure Type | Cast-in-place foundation + on-site welded steel structure | Factory-prefabricated steel modules, bolted connections | Fully integrated unit on wheeled/tracked chassis |
| Foundation Requirements | Concrete foundation; 15–30 days for civil works | Level, hardened site; localized embedding only at module support points | Foundation-free; site compaction only |
| Installation to Production | 3–6 months | 30–45 days | Ready for output 24 hours after delivery |
| Relocation Process | Dismantling + new foundation; 10–20 days of downtime | Hoisting and moving modules as units; ~3–7 days of downtime | Trailer positioning in 2 hours; production resumes in 1 day |
| Post-relocation Residual Value | Original foundation scrapped (non-recoverable) | Steel structures and modules recoverable/reusable | Chassis and main unit move with the station |
| Suitable Operational Cycle | Single site, >5 years | 3–5 years; few sites; site constraints | <3 years; multiple work faces |
| Capacity Flexibility | High (expandable on-site) | High (parallel module expansion; main unit foundation reusable) | Moderate (limited by chassis load capacity) |
| Relative Investment Level | Baseline | Baseline +8%–15% | Baseline +20%–30% |
Quick Verdict: For sites that can be hardened but cannot undergo major civil works, with 1–2 locations and a 3–5 year operational period, the modular station offers the best investment efficiency. For a single site with a cycle exceeding 5 years, a stationary line is preferable, potentially lowering the cost-per-ton by another 10%–15%; for projects with more than 3 work faces and a duration under 3 years, go directly with a mobile station.
Modular Crushing Station with Heavy-Duty Jaw Crusher
II. Why the primary crushing stage requires a heavy-duty jaw crusher
Modular stations shift the feasibility threshold back to the primary crushing unit itself. While stationary crushing lines can rely on cast-in-place foundations to directly absorb heavy impact loads, modular stations cannot; the rigidity of a steel modular frame depends on the frame's own structural design. Therefore, the primary crusher selected for such stations should be a model featuring a bolted, weld-free modular frame—since weld seams are the primary source of fatigue cracking under cyclic impact loads, a bolted frame design structurally eliminates this risk. This is why the primary crushing stage of modular stations typically utilizes the C-series (European-style heavy-duty) crushers rather than the standard PE-series models.
| Model | Feed Opening (mm) | Max. Feed Size (mm) | Discharge Setting (mm) | Rated Capacity (Limestone, t/h) | Hard Rock Capacity (Granite ×0.8–0.9, t/h) | Motor Power (kW) | Total Weight (t) |
|---|---|---|---|---|---|---|---|
| C96 | 930×580 | ≤480 | 70–200 | 60–175 | 48–158 | 75–90 | ≈14 |
| C106 | 1060×700 | ≤580 | 70–200 | 160–360 | 128–324 | 110–132 | ≈16 |
| C116 | 1150×800 | ≤640 | 90–250 | 140–320 | 112–288 | 132 | ≈21 |
| C120 | 1200×870 | ≤700 | 70–200 | 160–500 | 128–450 | 160 | ≈33 |
| C160 | 1600×1200 | ≤1000 | 150–300 | 500–1200 | 400–1080 | 250 | ≈76 |
Capacity rated based on limestone with a density of 1.6 t/m³; suitable for materials with compressive strength ≤320 MPa. The C160 unit weighs approximately 76 tonnes; it requires disassembly for transport and on-site lifting and assembly. While it falls under the category of modular delivery, its specifications exceed the load-bearing capacity of standard mobile crushing stations.
Three differences that translate into tangible economic value:
1. Hydraulic wedge-style discharge setting adjustment: Allows for specification changes in minutes. Shim-based adjustment requires 2–3 hours of downtime to remove or install shim packs, whereas the hydraulic wedge system takes only minutes and supports on-the-fly fine-tuning. Based on four product specification changes per month, this recovers approximately 40–80 hours of productive time annually.
2. Deep V-shaped crushing chamber: Offers lower specific energy consumption (kWh/tonne). The process relies primarily on compression rather than impact; for a given throughput, this reduces the proportion of fines in the aggregate stream and lightens the screening load. Specific energy consumption for the primary jaw crushing stage typically ranges from 0.5 to 1.2 kWh/tonne.
3. Reversible high-manganese steel jaw plates: Wear costs are predictable. When processing moderately abrasive materials (such as limestone or dolomite), the service life of the initial set of jaw plates can exceed 12 months; for highly abrasive materials like granite or basalt, spare parts planning is based on a 3–6 month cycle. The modular frame design allows for jaw plate replacement without disturbing the main crusher structure.
III. Three Typical Configuration Options
First, determine the capacity tier; next, select the primary crushing module; finally, verify the secondary crushing stage. The table below outlines the standard configuration framework for the modular station; actual specifications depend on raw material gradation and finished product requirements.
| Target Capacity (Limestone Basis) | Primary Crushing Module · Heavy-duty Jaw Crusher | Feed Opening / Max. Feed Size | Secondary Crushing Module | Screening Module | Hard Rock Capacity Supported by Primary Module | Typical Applications |
|---|---|---|---|---|---|---|
| 150 t/h | C106 | 1060×700 / ≤580 mm | Single-cylinder Hydraulic Cone (Secondary Type) | 3YK2160 (3-Deck) | 128–324 t/h | Medium-sized quarries, tunnel muck processing, construction waste recycling |
| 300 t/h | C120 | 1200×870 / ≤700 mm | Single/Multi-cylinder Hydraulic Cone | 4YK2160 (4-Deck) | 128–450 t/h | Fixed aggregate supply, primary crushing stage in mineral processing plants |
| 500 t/h | C160 | 1600×1200 / ≤1000 mm | Multi-cylinder Hydraulic Cone | 3YK2160 ×2 | 400–1080 t/h | Large-scale aggregate bases, metal mines |
The capacity of the entire line is always determined by the most restrictive link: the rated value of the primary crushing module represents only the upper limit, while the actual throughput of the secondary cone crusher and the screening area constitute the real bottlenecks. The last column in the table above indicates the hard rock capacity range supported by the primary module; the final line capacity must be verified against actual material gradation. Capacities exceeding 800 t/h typically require two secondary crushers or two primary jaw crushers operating in parallel, necessitating a custom-designed solution.
IV. Three Figures That Must Be Verified Before Commissioning
① Maximum feed lump size must be ≤ the permissible value for the primary crushing module. For the C120, the feed opening is 1200×870 mm, but the maximum feed size is 700 mm; for the C160, the opening is 1600×1200 mm, with a maximum feed size of 1000 mm. On-site control of rock fragment size is essential—whether through blasting gradation or grizzly screens. A single stoppage due to material jamming lasts 30–60 minutes; the cost of such downtime far exceeds that of any spare parts, and such jams are the primary cause of abnormal impact loads on modular frames.
② Size the secondary stage based on throughput, not just finished product output. In a closed-circuit setup with material recirculation, the secondary stage and the screen handle the sum of the finished product and the recirculating load. Assuming a 15% oversize rate (material retained on the screen), a finished product output of 300 t/h corresponds to a secondary stage throughput of approximately 353 t/h (300 &pide; 0.85). When configuring the line, verify this figure using the actual raw ore gradation: if the gradation is good and the oversize rate can be kept under 10%, the secondary stage can be sized at the lower end of the range; if the gradation is poor, capacity headroom must be reserved for potential upgrades.
③ Size the transformer capacity at 1.25–1.35 times the total installed power. While the electrical modules of modular stations undergo primary wiring and interlocking commissioning before leaving the factory, insufficient on-site power supply capacity is the most common reason for reduced operating speeds in overseas projects. Temporary job sites often face forced speed reductions due to inadequate generator power, effectively cutting actual production capacity by 30%. After confirming local grid specifications (e.g., 380V/50Hz, 400V/50Hz, or 440V/60Hz), calculate the required transformer capacity and select the appropriate starting method (soft start or star-delta) based on the final equipment configuration.
V. When Modular Stations Win: A Comparison Based on Total Cost of Ownership (TCO)
Given the same primary equipment and production capacity, the differences between the three configurations lie solely in three cost areas: civil works, construction duration, and site relocation.
| Cost Item | Stationary | Modular | Mobile |
|---|---|---|---|
| Equipment Unit | Baseline | Baseline +8%–15% (modular steel structure, pre-installed electrical controls) | Baseline +20%–30% (chassis, hydraulic legs, vehicle-mounted electrical controls) |
| Foundation & Civil Works | Concrete foundation: approx. ¥250,000–400,000; duration: 15–30 days (based on 150 t/h capacity) | Hardened site + localized embedded parts; saves approx. 50%–70% compared to stationary | 0 |
| Installation to Production | 3–6 months | 30–45 days | 24 hours |
| Downtime per Relocation | 10–20 days | Approx. 3–7 days | 1 day |
| Relocation Residual Value | Original foundation not recoverable | Steel structure modules reusable | Relocates with the plant |
| 3-Year Aggregate Cost per Ton | High (fixed investment must be amortized within the period) | Medium (optimal for 3–5 year cycles) | Low (under 3 years; multiple work sites) |
The table above shows relative cost ranges for scheme selection and does not constitute a price quote. Civil work figures are based on estimates for a 150 t/h stationary crushing plant; actual costs vary depending on the number of modules, steel structure design, and local labor rates.
Modular Crushing Station – Client Site in Russia
VI. FAQ
Q1: What exactly is the difference between a modular crushing plant and a mobile crushing plant?
A1: The differences lie in the "foundation" and the "maximum specifications of the main crusher." Mobile plants are mounted on wheeled or tracked chassis, requiring no foundation and producing material within 24 hours of arrival; however, chassis load limits restrict the size of the main crusher. Modular plants replace cast-in-place foundations with steel structure modules, taking 30–45 days to assemble and commission on-site; they can support large, heavy-duty jaw crushers (like the C120 or C160) for higher production capacities, with a relocation downtime of approximately 3–7 days.
Q2: Does a modular crushing plant really not require a concrete foundation?
A2: It does not require a large cast-in-place foundation, but it does require a hardened, level site, as well as localized embedded parts or independent foundation footings at the module support points. This represents the fundamental cost difference compared to stationary plants: the savings come from eliminating large-scale reinforced concrete structures, not from removing all civil engineering work.
Q3: Why is the C-Series recommended over the PE-Series for the primary crushing stage of modular plants?
A3: The C-Series features a bolt-connected, weld-free modular frame and a hydraulic wedge-based discharge opening adjustment system; structurally, this eliminates the risk of fatigue cracking in welds caused by cyclic impact loads and allows for discharge opening adjustments in minutes. In contrast, the PE-Series relies primarily on shim adjustments and welded frames, prioritizing versatility and cost-effectiveness. The site conditions and frequent specification-switching requirements of modular plants make the C-Series a better fit.
Q4: How is production capacity calculated for granite applications?
A4: The capacity figures in this document are calibrated based on limestone (density: 1.6 t/m³). The lithology conversion factors are: Granite ×0.8–0.9, Basalt ×0.70–0.80, River Pebble ×0.80–0.90, and Iron Ore ×0.60–0.75. Taking the C120 as an example: while its limestone capacity is 160–500 t/h, the converted capacity for granite is approximately 128–450 t/h; the overall line capacity is further capped by the secondary stage (cone crusher and screen).
Q5: How long does it take from order placement to commissioning? Is export available?
A5: The standard delivery period for a modular plant is approximately 45–60 days, with an additional 30–45 days required for on-site installation, commissioning, and startup. Modules can be shipped via 40HQ containers or flat-rack containers and assembled on-site using bolted connections (no welding required). Customization for 380/400/440V and 50/60Hz power supplies is available; for export projects, we provide multilingual operation manuals and remote commissioning guidance for the destination port.
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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