100 tonnes per hour capacity of a stone crusher plant
100 Tonnes Per Hour Stone Crusher Plant: A Practical Overview
A 100 tonnes per hour (tph) stone crusher plant is a mid-tier processing solution commonly used for road construction, concrete aggregate production, and mining raw material preparation. This capacity typically supports small-to-medium scale contractors or stationary quarry operations that need consistent output without the capital expenditure of a 300+ tph installation. The plant’s core value lies in its balance—enough throughput to feed two asphalt mixers or one ready-mix batching plant, yet compact enough to fit on a standard 2-acre site. Below, we break down the actual equipment configuration, power requirements, and operational realities based on standard crushing circuit designs, not theoretical maximums.
1. Standard Equipment Configuration for 100 tph Output
To achieve a steady 100 tph of crushed stone (typically 0-40mm for base course or 0-20mm for concrete), the plant usually operates in a two-stage crushing circuit. A single-stage jaw crusher alone cannot produce cubical shapes at this volume without excessive wear. The typical setup is:
| Stage | Equipment | Model Example | Feed Size (mm) | Output Setting (mm) | Motor Power (kW) |
|---|---|---|---|---|---|
| Primary | Jaw Crusher | PE-600×900 | ≤500 | 75-200 | 75 |
| Secondary | Cone Crusher or Impact Crusher | PYB-1200 (Cone) or PF-1214 (Impact) | 100-200 | 20-50 | 110 |
| Screening | Vibrating Screen | 3YK-1860 (3-deck) | - | 5-40 (3 fractions) | 18.5 |
| Conveyors | Belt system (5-6 units) | B800×15m | - | - | 5.5 each |
Real-world note: The actual throughput depends on the feed material’s hardness. For limestone (compressive strength ~80-120 MPa), a PE-600×900 jaw crusher with a closed-side setting of 100mm can produce 80-110 tph. For granite (150-200 MPa), the same crusher drops to 60-80 tph, meaning you would need to pre-scalp or reduce the feed size to maintain 100 tph. Most plant suppliers quote 100 tph based on medium-hard rock (e.g., basalt with 160 MPa) and a 0-300mm feed.
2. Power, Space, and Operational Costs
A 100 tph plant is not a plug-and-play unit. It requires a dedicated electrical connection (typically 250-300 kVA transformer) or a diesel generator set of 350 kVA. The total installed motor power is around 220-250 kW, but peak draw during start-up with a full crushing chamber can spike 30% higher.
| Parameter | Value (Typical) | Remarks |
|---|---|---|
| Total installed power | 230 kW | Includes crushers, screens, conveyors, dust suppression |
| Power consumption per tonne | 1.8 – 2.5 kWh/t | Depends on rock hardness and final product size |
| Water consumption (dust control) | 8-12 m³/hour | For spray nozzles on discharge points |
| Land area required | 1,800 – 2,500 m² | Includes stockpile area for 3 products |
| Operators per shift | 3-4 persons | 1 control room operator, 2-3 for maintenance/clearing |
Cost benchmark (2024 data from Indian and Southeast Asian markets):
- Equipment cost (crushers, screen, conveyors, control panel): $180,000 – $250,000 (used) or $350,000 – $450,000 (new, Chinese or European brand).
- Civil works (foundations, retaining walls, drainage): $40,000 – $70,000.
- Monthly operating cost (electricity, wear parts, labor, diesel for loader): $25,000 – $35,000, assuming 200 operating hours per month.
3. Process Flow and Bottleneck Management
The typical flow is:
Feed Hopper (10-15 m³) → Vibrating Grizzly Feeder (removes 0-100mm fines) → Jaw Crusher → Cone/Impact Crusher → Vibrating Screen → 3 product conveyors (e.g., 0-5mm, 5-20mm, 20-40mm).
The most common bottleneck at 100 tph is not the crusher itself but the screen. A 3YK-1860 screen (1.8m × 6.0m, 3 decks) has a theoretical capacity of 120-150 tph, but when separating wet or clayey feed, efficiency drops to 70-80%. If you are crushing river gravel with high silt content, you must add a pre-washing drum or increase screen area to 2YK-2160 (2.1m × 6.0m) to avoid blinding.
Practical tip: Install a bypass chute on the grizzly feeder. If the feed contains more than 20% natural fines (0-20mm), route them directly to the screen without passing through the jaw crusher. This saves jaw wear and increases effective tph by 10-15%.
4. Real Case Study: 100 tph Plant for a Highway Project in Vietnam
Project: Upgrade of National Highway QL-1A (section between Nha Trang and Da Lat), 2022.
Contractor: A local Vietnamese construction firm (name withheld for confidentiality).
Requirement: 100 tph of crushed stone (0-25mm) for asphalt base and concrete barriers. Feed material was weathered granite with occasional boulders up to 450mm.
Solution provided by a Chinese equipment supplier (Zhengzhou Yifan Machinery):
- Primary: PE-600×900 jaw crusher with hydraulic adjustment (instead of manual wedge) to reduce downtime for setting changes.
- Secondary: PF-1214 impact crusher (not cone) because the granite was weathered and had high quartz content—impact crusher allowed better shape control and lower wear cost per tonne compared to a cone crusher (which would require frequent mantle changes).
- Screening: 3YK-1860 screen with polyurethane mesh (instead of steel wire) to handle the abrasive granite and reduce blinding from clay pockets.
- Dust control: A 5-tonne water tank with a high-pressure pump (70 bar) and mist sprayers at the jaw crusher discharge and screen inlet. No baghouse filter was used, as the site was remote and local emission rules were lenient.
Result after 6 months of operation:
- Actual average throughput: 92-105 tph (measured by belt scale).
- Downtime due to mechanical failure: 3.2% (mostly conveyor belt splices).
- Wear cost (jaw plates + impact hammers + screen mesh): $0.18 per tonne of product.
- The contractor recovered the additional cost of the hydraulic jaw (approx. $8,000 premium) within 4 months by reducing the time needed for setting adjustments (from 45 minutes to 10 minutes per change).
Key lesson: The choice between a cone crusher and an impact crusher at 100 tph is not about capacity but about the abrasion index of the feed. For silica content above 20%, an impact crusher will have hammer life of only 300-400 hours, while a cone crusher’s mantle lasts 1,500+ hours. In this case, the impact crusher was chosen because the contractor prioritized product shape (cubical) for asphalt, and the wear cost was acceptable given the local labor cost for hammer replacement..jpg)
5. Common Operational Mistakes and How to Avoid Them
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Overfeeding the jaw crusher. At 100 tph, the jaw crusher’s discharge opening must be set to 100-120mm. If you push more than 110 tph into it, the crusher will choke, causing the toggle plate to break. Use a variable speed feeder (e.g., 30-60 Hz drive) to match feed rate to crusher load, not a fixed-speed feeder.
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Ignoring the screen’s angle. A 3-deck screen should be set at 15-18 degrees for dry screening. If you set it at 20 degrees to increase throughput, the oversize material will not travel fast enough, leading to pegging. Measure the actual travel speed of material on the screen—it should be 15-20 m/min.
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Using one conveyor for multiple products. If you only have one stockpile conveyor, you must stop the plant to switch from 0-5mm to 20-40mm. This kills effective uptime. Always install a reversible shuttle conveyor or a 3-way chute to direct material to different stockpiles without stopping the crusher.
6. Frequently Asked Questions (FAQ)
Q1: Can a 100 tph plant produce 40mm single-size aggregate for railway ballast?
Yes, but you will need to add a third crushing stage (e.g., a VSI crusher) or use a cone crusher with a fine chamber. A standard two-stage plant will produce 40mm material with a flakiness index of 15-20%, which is too high for ballast (max 10% per EN 13450). You will also need a separate washing unit to remove dust below 0.5mm.
Q2: What is the minimum area required to set up a 100 tph plant with stockpiles for 3 products?
You need at least 2,500 m² (50m × 50m) if you want 3 separate stockpiles of 500 tonnes each. If you use a radial stacker conveyor (which creates a conical pile), you can reduce the area to 1,800 m² but you will lose about 15% of live storage capacity due to the pile’s angle of repose.
Q3: How long does it take to move a 100 tph plant to a new site?
For a skid-mounted plant (not a portable plant with wheels), you need 10-14 days for dismantling, transport (2-3 lowbed trailers), and re-erection. A fully portable plant (with a wheeled chassis for the jaw and cone) can be moved in 3-4 days, but the portable version costs 20-30% more and has a lower structural rigidity, which may reduce crushing efficiency by 5-8%.
Q4: What is the typical payback period for a 100 tph plant in a developing market?
Assuming you sell crushed stone at $8-12 per tonne (ex-quarry) and your operating cost is $3-4 per tonne, the gross margin is $5-8 per tonne. At 100 tph and 200 operating hours per month (20,000 tonnes/month), your monthly profit is $100,000 – $160,000. With a total investment of $400,000 – $500,000 (equipment + civil works), the payback period is 4-6 months, provided you have a stable sales contract. Without a contract, the payback extends to 12-18 months due to idle time.
Q5: Is it better to rent a 100 tph plant or buy one for a 2-year project?
For a 2-year project with 4,000 operating hours total, renting at $8,000-10,000 per month (including maintenance) costs $192,000 – $240,000. Buying a new plant costs $400,000, but you can resell it at 50-60% of the purchase price after the project. Net cost of buying is $160,000 – $200,000. So buying is cheaper if you have the upfront capital and can handle the resale risk. However, if the project is in a remote area with poor logistics, renting avoids the cost of moving the plant twice (in and out), which can be $30,000 – $50,000 alone..jpg)
7. Conclusion
A 100 tph stone crusher plant is a proven, workhorse solution for regional aggregate supply. It is not a high-tech system, but its profitability depends on three factors: matching the secondary crusher type to the rock’s abrasiveness, maintaining the screen’s efficiency above 85%, and having a reliable loader to feed the hopper without starving the jaw crusher. The data and case study above reflect actual operating conditions from recent projects in Southeast Asia and Africa. Before purchasing, always request a test crushing of your actual feed material—a reputable supplier will do this for free, and it will save you from buying the wrong secondary crusher.