In the construction of large-scale infrastructure such as roads, bridges, and airports, high-quality aggregates and roadbed materials are the cornerstone of project quality. To meet growing market demand, a scientifically designed, stable, and highly productive crushing production line is a key competitive advantage. This article details a complete crushing and screening solution designed specifically for dolomite with a production capacity of 200-300 tons/hour. This solution can simultaneously and precisely produce a variety of aggregate sizes, including 5-10mm, 10-20mm, and 15-25mm, as well as roadbed materials sized 0-40mm.
I. Project Core Requirements and Challenges Analysis
• Raw Material Characteristics: Dolomite (a type of limestone) has medium hardness and moderate abrasiveness, making it an ideal raw material for producing construction aggregates.
• Target Production Capacity: 200-300 tons/hour (approximately 2,000-3,000 tons/day, based on a 10-hour operating day). The equipment must operate continuously and stably with a low failure rate.
• Product Requirements: Multi-graded and high-precision. The need to simultaneously produce three different types of high-quality aggregates and a roadbed mix places high demands on screening efficiency and crushing technology.
• Equipment Type: Fixed or semi-mobile. Fixed quarries are suitable for long-term, large-scale quarries; semi-mobile quarries combine the efficiency of fixed quarries with a certain degree of flexibility, making them suitable for relocation from one mine site.
II. Core Crushing Process Analysis ("Three-Stage, One Closed Circuit" Efficient Process)
To achieve high-precision and high-efficiency production goals, we recommend the classic "jaw crusher for primary crushing + cone crusher for secondary and fine crushing + vertical shaft impact crusher for sand shaping + multi-stage screening closed circuit" process.
1. First Stage: Primary Crushing - Jaw Crusher
◦ Function: Receives raw ore from the silo (which may have a particle size of several hundred or even thousands of millimeters) and performs the first stage of intensive crushing, reducing it to less than 250-300 mm.
◦ Equipment Advantages: Simple structure, reliable operation, and high throughput, making it the "throat" of the crushing production line.
2. Second Stage: Secondary and Tertiary Crushing - Cone Crusher
◦ Function: Receives material from the jaw crusher and performs secondary and tertiary crushing to produce smaller intermediate products (e.g., 0-40mm).
◦ Equipment Advantages: Utilizing a laminated crushing principle, it is suitable for crushing hard materials, boasts long wear-resistant parts life, and offers high production efficiency. It is a key piece of equipment for ensuring production capacity and reducing the production of flaky particles.
3. Third Stage: Sand Shaping (Optional) and Screening - Vertical Shaft Impact Crusher + Multi-layer Vibrating Screen
◦ Function:
▪ Vertical Shaft Impact Crusher: This crushing method, known as "rock-on-rock" or "rock-on-iron" crushing, effectively improves the aggregate shape, creating a cubic shape and increasing product value. This equipment is essential for producing manufactured sand.
▪ Multi-layer Vibrating Screen: This is the core element for grading various product specifications. We recommend using a large multi-layer circular vibrating screen or banana screen for efficient screening of the crushed mixture. ◦ Closed-circuit circulation: Large particles that do not meet the requirements on the screen will be returned to the cone crusher or impact crusher for further crushing, forming a closed-circuit circulation system, ensuring that all materials are processed to the target particle size and maximizing resource utilization.
III. Recommended Equipment Configuration List (200-300 TPH Class)
Process Recommended Equipment Model Main Function Remarks
| Process | Recommended Equipment Model | Main Function | Remarks |
| Feeding | Grizzled Vibrating Feeder | Provides uniform, continuous feeding and initial screening to remove dirt and fine particles | Ensures stable feed for subsequent crushers |
| Coarse Crushing | Large Jaw Crusher (e.g., PE1200×1500) | Crushes large dolomite lumps to medium-sized particles | Robust equipment provides a stable material supply for the entire line |
| Secondary and Fine Crushing | Single- or multi-cylinder hydraulic cone crusher (e.g., HPT300) | Finely crushes medium-sized materials, a key production equipment | High production capacity, low failure rate, and excellent finished product shape |
| Shaping and Screening | Vertical Shaft Impact Crusher + 3- or 4-deck Vibrating Screen | Optimizes aggregate shape and provides precise screening and grading | Vibrating screens can be configured with multiple layers depending on the number of finished product specifications |
| Conveyor Connections | Belt Conveyor System | Connects various equipment and transports materials | Customizable length and angle based on site layout |
| Control System | Centralized Electronic Control System | One-touch start and stop, operating status monitoring, and fault alarms | Achieve automation, reduce labor, and improve safety |
Feeding | Gripper Vibrating Feeder: Provides uniform and continuous feeding, and initially removes dirt and fine particles. Ensures stable feed for subsequent crushers.
Coarse Crushing | Large jaw crusher (e.g., PE1200x1500) | Crushes large dolomite lumps to medium-sized particles. Robust equipment provides a stable material supply for the entire line.
Secondary and Tertiary Crushing | Single- or multi-cylinder hydraulic cone crusher (e.g., HP300) | Finely crushes medium-sized materials. Key production equipment. High productivity, low failure rate, and excellent finished product shape.
Shaping and Screening | Vertical Shaft Impact Crusher + 3- or 4-deck Vibrating Screen: Optimizes aggregate shape and provides precise screening and grading. Vibrating screens can be configured with multiple layers depending on the number of finished product specifications.
Conveying and Connection | Belt Conveyor System: Connects various equipment and transports materials. Length and angle can be customized to suit site layout.
Control System | Centralized Electronic Control System One-touch start and stop, operating status monitoring, and fault alarms | Automation reduces labor and improves safety.
IV. Solution Advantages Summary
• High-Quality Finished Product: Multi-stage crushing and a closed-circuit process ensure cubic aggregate shape, optimal gradation, and strong compressive strength, fully meeting the requirements of high-grade commercial concrete and roadbed construction.
• Stable and compliant production capacity: The equipment selection allows for margins, ensuring continuous and stable operation within the 200-300 tons/hour range, easily achieving daily production capacity exceeding 2,000 tons.
• Economical Operating Costs: The core crushing equipment utilizes efficient and wear-resistant models, reducing specific energy consumption and the frequency of replacement of wearing parts, resulting in significant long-term operational benefits.
• High Flexibility: Available in both fixed and semi-mobile configurations, the system can be flexibly customized to suit your mine's service life and site planning.
• Environmentally Friendly and Intelligent: The system can be equipped with a comprehensive dust and noise reduction system and automated controls for green and intelligent production. This dolomite crushing production line solution not only solves the core challenge of producing high-precision aggregates of various specifications, but also strikes an optimal balance between production capacity, energy consumption, and long-term operating costs. We provide a complete service package, from site surveys and design, equipment manufacturing, installation and commissioning, to personnel training.
Baichy Heavy Industry – Your Trusted Partner for Seamless Equipment Operation
To ensure optimal performance of your equipment, Baichy Heavy Industry offers:
- Professional on-site installation guidance
- Comprehensive operator training
- 24/7 technical support & maintenance services
Our complete after-sales service system guarantees long-term, stable operation of your machinery with minimal downtime.
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