Why Have Feeder Breakers Become The Rom Crusher Of Choice In Coal
Introduce
In the challenging mining and aggregate environments, the equipment not only needs to perform its functions, but also should offer simplicity, robustness and long-term value. This is precisely the purpose of the feeder breaker design. Compared with traditional feeding equipment and separate crushing equipment, the integrated design of feeding and crushing in the feeder breaker provides outstanding performance, less maintenance and higher throughput in a compact, sturdy and practical machine. If it is a combination of feeding and crushing, it requires two separate equipment, which may demand a larger installation site, higher costs for the supporting lines and foundation construction, and additional maintenance and debugging for each equipment during subsequent operation, with more parts, higher complexity and more fault points.
What is a Coal-specific Feeder Breaker?
The Feeder Breaker is a comprehensive mining crushing equipment that integrates functions of feeding, quantitative conveying, crushing, and screening. It was designed specifically for soft layered coal, lignite, and other materials, fully meeting the characteristics and requirements of coal mining.
Core working principle
Unlike traditional crushers that rely on squeezing and impacting to break materials, the Coal-specific Feeder Breaker adopts the tension crushing principle: using the replaceable cutting teeth on the equipment to stretch and break the raw coal, taking advantage of the physical properties of coal – its tensile strength is much lower than its compressive strength. This crushing method does not require high energy consumption to complete the crushing process and can avoid excessive crushing that leads to excessive coal powder, achieving efficient and low-loss crushing.
Core classification
According to the installation and movement method, the Feeder Breaker is mainly divided into two types: one is the fixed-type Feeder Breaker, which is mostly used for fixed mining working faces underground and fixed crushing sites on the ground for washing and sorting; the other is the tracked mobile-type Feeder Breaker, which can move flexibly with the mining working face. The two types of products can simultaneously adapt to the full-scene production needs of open-pit and underground coal mines.
Core function
The core function of the Feeder Breaker is to complete the pre-treatment of raw coal at the front end. On the one hand, it breaks and disintegrates the large pieces of raw coal extracted from the mine, processing the raw materials into uniformly sized standardized materials. On the other hand, it can convey them at a constant speed and quantity to the subsequent equipment, ensuring the stable and continuous operation of subsequent belt conveyors and washing and processing equipment, avoiding problems such as blockage of large pieces of raw coal and unstable supply that affect the efficiency of the entire production line.
Adaptation to coal conditions
In many coal-producing areas, the moisture content and stickiness of raw coal are high. Traditional crushers are prone to problems such as wall sticking and material blockage, which can reduce production capacity or require shutdown for cleaning, seriously affecting the production rhythm. The crushing and conveying structure of the Feeder Breaker has been specially optimized, making it less likely to get stuck or blocked when processing high-humidity and sticky coal, fundamentally solving the industry pain point of machine breakdowns due to blockages. Whether it is dry open-pit raw coal or underground wet and sticky raw coal, it can be processed stably.
The size of raw coal after coal mining in the mine is unstable, often appearing oversized pieces with diameters over 1m. Traditional crushing equipment has strict requirements for the size of the incoming material and must undergo pre-crushing treatment before entering the crushing process. The feeding chamber of the Feeder Breaker has a redundant design, which can directly accept oversized raw coal with a maximum side length of over 1.5m, without the need for pre-crushing and pre-treatment, fully adapting to the unstable size characteristics of raw coal from coal mining in the mine.
The instantaneous large load impact from truck direct unloading and the working face unloading of underground mining equipment both belong to sudden large loads. The Feeder Breaker is equipped with a large-capacity buffer hopper, which can directly receive the instantaneous unloading impact from trucks and mining equipment, possessing extremely strong buffering capacity, and can adapt to the 24-hour high-intensity continuous operation requirements of coal mines.
Integrated structure design
The Feeder Breaker adopts an integrated design, with one piece of equipment being able to replace the traditional “feeding machine + classification crusher” dual equipment combination, directly reducing the number of equipment purchases and eliminating the need to purchase two additional pieces of equipment, reducing the procurement cost by 15%-25%.
The traditional dual equipment combination requires a larger area and the construction of an exclusive screening platform and independent operation area, with high infrastructure investment. The Feeder Breaker has a compact structure and occupies less than 30% of the space compared to the traditional dual-unit system. It does not require the construction of additional dedicated screening platforms or large operation areas. For new mines, it can reduce infrastructure investment; for old mines undergoing renovation, it can save on site renovation costs. The overall infrastructure cost can be reduced by more than 30%.
The entire Feeder Breaker has fewer moving parts and a shorter transmission chain, resulting in a transmission efficiency far higher than that of traditional split units. The energy consumption for crushing per ton of coal is 10% to 20% lower than that of traditional equipment. For a coal mine with an annual output of one million tons, it can save tens of thousands of yuan in electricity costs each year, and the long-term energy-saving benefits are particularly significant.
Low operation and maintenance costs, high stability
The overall structure of the machine is streamlined, with only the cutting teeth being the core vulnerable parts. The number of vulnerable parts is far less than that of traditional split equipment. Traditional screening and crushing units also need to replace multiple vulnerable components such as screen nets and conveyor belts. The annual spare parts procurement cost of Feeder Breaker can be reduced by more than 40%.
The equipment adopts an open structure design. Operations such as replacing the cutting teeth can be completed outside the equipment without disassembling the large structure or requiring large auxiliary equipment such as cranes. The single operation time is shortened by more than 60% compared to traditional equipment, significantly reducing the downtime that affects production capacity.
Traditional split units have complex screening structures, which are prone to frequent faults such as locked rotation, stuck machinery, and belt deviation. However, Feeder Breaker does not have complex screening structures. From the design perspective, these common faults are completely eliminated. The equipment failure rate is reduced by more than 70% compared to traditional equipment, and it can stably adapt to the 24-hour continuous operation requirements of coal mines.
The application scope of Feeder Breaker
Although Feeder Breaker is suitable for most scenarios of coal production, it has clear applicable boundaries: its optimal application scenarios are open-pit coal mine raw coal crushing pre-treatment, underground coal mine working face raw coal crushing, lignite mining crushing, and other soft layered mineral crushing processing. It can fully leverage its advantages of high efficiency and low consumption.
However, it is necessary to clarify that Feeder Breaker is based on the tension crushing design principle and is not suitable for the crushing processing of high-hardness rocks and hard metal ores. These materials also have high tensile strength and cannot be efficiently crushed through tension crushing. Choosing the wrong equipment will instead affect production efficiency and increase losses.
Summary
As an integrated crushing equipment specifically designed for coal mining, the Feeder Breaker has been meticulously designed based on the principle and structure optimization to fully meet the working conditions of coal mining. It has overcome the problems of equipment blockage, high cost, and difficult operation faced by traditional crushing and screening equipment. It not only reduces the overall production cost of the coal mine throughout the cycle but also enhances production stability and availability. It is currently a superior choice for the pre-processing stage of coal crushing. For coal mine users, as long as they make reasonable selections based on their own mining materials and production scenarios, they can fully leverage the performance advantages of the Feeder Breaker and help the coal mine achieve cost reduction and efficiency improvement.
