What is the application of feeder breaker in the mining industry
In mining production, the efficiency of material handling directly affects the overall mining progress and cost control. The Feeder Breaker, as a key equipment integrating feeding and crushing functions, plays an irreplaceable role in surface and underground mining operations with its unique design and powerful performance.
Core Functions of Feeder Breakers in Mining Operations
The Feeder Breaker was designed to address the pain points of “uneven material size” and “disconnection between transportation and processing” in mining production. Its core functions can be summarized as follows:
Material crushing and size standardization
The equipment is equipped with a high-strength rotating crushing device, capable of handling materials with an unconfined compressive strength of up to 50 MPa (7,000 PSI), and crushing raw ore (ROM) to a uniform particle size for transportation or subsequent processing. For example, crushing 1-2-meter large blocks of coal to below 300 millimeters to ensure the safe operation of belt conveyors and other equipment.
Stable feeding and flow control
Through the chain plate conveyor structure, it realizes continuous and uniform material transportation, avoiding blockages or empty loading in downstream equipment due to fluctuating feed. At the same time, the buffering capacity of the equipment allows transportation equipment (such as trucks, loaders) to discharge materials at maximum efficiency, reducing waiting time.
Flexibility for diverse scenarios
It supports fixed, mobile, or semi-mobile installation, and can be combined with hoppers, loaders, bulldozers, etc., to meet the feeding requirements of different mining environments. For example, a crawler-type Feeder Breaker can move with the mining working face to achieve on-site crushing and short-distance transportation.
Safety and durability design
Full welding frame and carbide chromium wear-resistant liner extend the equipment’s lifespan.
Equipped with fire protection systems, emergency stop buttons, remote control, etc., for safety devices.
Alloy steel chains and shaft systems ensure tensile strength under high-intensity operations.
Application in Surface Mining Operations
In surface mining operations, the size of materials after blasting or excavation varies greatly, and the feeder breaker becomes a key link connecting the mining process with subsequent processing.
Open-pit coal mine
After blasting, the raw coal often contains large rocks, with sizes reaching 1-2 meters. The feeder breaker crushes them to below 300 millimeters to prevent belt conveyors from getting clogged, while providing qualified raw materials for the coal washing plant and reducing subsequent processing energy consumption.
Metal mine
In the mining of copper, iron, and other metals, the equipment can crush hard ores, providing suitable particle sizes for beneficiation equipment such as ball mills and magnetic separators. For example, after crushing iron ore, it directly enters the magnetic separation process, increasing beneficiation efficiency by approximately 15%-20%.
Cave mining
For building stone materials such as limestone and granite, the equipment can crush them into specifications of 1-3 centimeters or 3-5 centimeters, and combine with screening equipment to achieve classification, meeting various demands such as road construction and concrete production.
Complex terrain and waste material handling
The feeder breaker is combined with mobile crushing stations to achieve on-site crushing in mountainous mining areas, reducing secondary transportation costs;
Processing stripped waste rock and topsoil, crushing them for use in mining area road construction or backfilling, increasing resource utilization.
Application in Underground Mining Scenarios
Underground mining has limited space and complex transportation routes, and the application of the feeder breaker focuses on solving material blockage and continuous transportation problems.
Workface end
In longwall mining or room-and-pillar mining, the scraper conveyor transports the blasted ore (containing large rocks) to the feeder breaker, which is then crushed and transported out via belt conveyors or mine cars, achieving seamless connection from “mining – crushing – transportation”.
Bottom of the chute
When the ore is lowered from the upper mining area to the horizontal tunnel through the chute, large rocks tend to accumulate at the exit. The equipment directly receives the ore discharged from the chute, crushes it, and uniformly transports it to the downstream system to ensure the smoothness of the chute – transportation chain.
Underground crushing chamber
In mines with centralized transportation in multiple mining areas, the underground crushing chamber with the feeder breaker as the core can uniformly handle ores from different areas, standardizing particle sizes and distributing them to hoisting wells or beneficiation systems to improve overall transportation efficiency.
Drilling workface
Combined with the drilling machine, it promptly crushes the large rocks generated during the drilling process, avoiding accumulation that affects progress, and directly transports the crushed rocks out, reducing the occupation of underground storage space.
The materials handled by the feeder breaker in Mining Applications
The feeder breaker can handle various raw materials and waste materials from mining production.
Coal: raw coal (containing shale, clay, etc. impurities), coke residue;
Hard rock ores: iron, copper, gold, zinc, lead, etc. metals (often containing quartz, granite, etc. surrounding rocks);
Industrial minerals: limestone (for cement raw materials), gypsum (for building materials), potassium salt (for fertilizer raw materials);
Waste materials and stripped materials: gangue (rock around the ore vein), topsoil (soil and vegetation covering the ore layer);
Aggregate: granite, basalt, etc. building crushed stones, and sand and gravel materials (removing oversized particles).
Advantages of Feeder Breakers in Mining
Customized adaptation
Can be designed for the feed end (such as tank truck interface, swing gate) and select the driving method (frequency conversion drive / hydraulic drive) to adapt to different transportation equipment and production capacity requirements.
Cost and labor savings
Expand the loading area, reduce the manual stacking process, and lower downtime; Integrated design reduces losses in equipment connection, with energy consumption reduced by approximately 10%-20%.
High reliability and easy maintenance
Chromium carbide wear-resistant liners and alloy steel components extend service life; optional automatic lubrication system and maintenance platform simplify maintenance procedures and enhance safety.
Precise control and safety assurance
Through the PLC control system, the sequence of crushing and conveying is achieved in coordination. Equipped with functions such as emergency stop and remote operation, it ensures operational safety.
Maintenance and Operational Considerations
Replacement of cutting teeth on the crushing roller
The cutting teeth are fixed on the knife holder via clamps or expansion rings. When replacing, simply remove the old cutting teeth by disassembling the clamps and install the new ones in the reverse direction. Regularly check the wear condition to ensure crushing efficiency.
Chain tension adjustment
The return side of the chain needs to be slightly slack. Check the tension at the machine head to avoid being too tight or too loose. Adjust the tension by injecting grease into the tail hydraulic cylinder and fixing the position with steel washers.
Replacement of chain plates and scrapers
The conveyor chain plates are connected by detachable links. When replacing, align the marked links for disassembly, replace the worn parts as a whole, and ensure smooth chain operation.
Product particle size adjustment
Increase particle size: Remove the spacer above the bearing seat, raise the crushing roller, move the spacer to the bottom of the bearing seat, and simultaneously adjust the height of the motor base.
Reduce particle size
Reverse the operation, remove the spacers below the bearing seat and the motor base, lower the height of the crushing roller.
Conclusion
The feeder breaker, through its integrated design of “feeding + crushing”, has achieved efficient, standardized and safe material processing in mining production. Whether it is large-scale surface mining or restricted space operations underground, its flexible adaptability and powerful performance have become the key to increasing production capacity and reducing costs. In the future, with the integration of intelligent technology, the feeder breaker will further develop towards automation and remote monitoring, providing more powerful equipment support for the green and efficient mining of the mining industry.
