With the continuous growth of global energy demand, coal, as one of the main energy sources, its mining and utilization are of great significance to economic development. As the demand for more efficient coal resource mining increases, the role of crushing equipment in the mining industry is becoming increasingly important.

Among them, the crushing station, as the core part of the open-pit coal mine production process, undertakes important tasks such as coal crushing, screening, and material classification in coal mining. Mineral sizer is the preferred main crushing equipment.

A large open-pit coal mine of a client of KLC in Mongolia is located in the grassland area in the north of Mongolia. Here, winters are extremely cold and summers are dry. The extreme climate poses strict requirements for the adaptability of mining equipment.

As a core coal supply base for the local area and even the whole country, this coal mine shoulders the important mission of ensuring the stable output of energy. The advanced mining equipment and professional mining team it is equipped with keep its annual production capacity consistently at the forefront of the industry.

In early 2024, to further enhance the efficiency and stability of the crushing process, this customer purchased two Mineral sizer units from our company and integrated them into the production process of the main crushing station. According to the feedback from our customers, since the equipment was put into operation, its performance has far exceeded expectations.

The operation status has remained stable without any major malfunctions. The crushing efficiency has increased by 30% compared with the traditional equipment used before, and the daily coal processing capacity has significantly increased.

Meanwhile, mineral sizer, with its superior wear resistance, significantly reduces the replacement frequency of vulnerable parts, directly saving maintenance costs for customers. Continuous and stable operation also reduces the occurrence of production interruptions caused by equipment downtime.

In addition, the excellent particle size control ability of Mineral sizer has improved the uniformity of the particle size of the crushed coal, effectively reducing the risk of material blockage in the subsequent conveying process. At the same time, it has also enhanced the accuracy and efficiency of the screening process, providing a solid guarantee for the efficient production of the entire coal mine.

Due to the harsh working environment in coal mines, equipment components are prone to friction and impact from coal. However, mineral sizer performs exceptionally well in terms of wear resistance and stability. This equipment adopts high-strength wear-resistant materials and advanced structural design, which significantly extends the service life of key components and reduces the number of shutdowns for maintenance caused by component wear.

Its stable operational performance ensures that the entire crushing station can work continuously for a long time, providing stable and reliable power support for the open-pit coal mine production of KLC customers in Mongolia and significantly improving the overall production efficiency.

Mineral sizer processes different types of coal

Anthracite

Anthracite is a type of coal with a relatively high degree of coalification, typically featuring a low volatile matter content and a high fixed carbon content, with a relatively dense structure.

Mineral sizer is particularly effective in processing anthracite because of its relatively hard physical properties. mineral sizer can provide precise particle size control through adjustable gear clearance and is suitable for crushing this type of hard coal. Its double-toothed roller design can effectively crush anthracite with relatively low power consumption, avoiding over-crushing.

Bituminous coal

Bituminous coal has a relatively low degree of coalification, strong volatile matter and caking property, and is sometimes classified into multiple subcategories (such as coking coal, gas coal, etc.).

Coking coal and gas coal: These types of coal have strong caking properties. The use of mineral sizer can help control the particle size more precisely and prevent excessive fine powder from being produced during the coal crushing process. The advantage of mineral sizer lies in its strong targeting, which enables it to adjust the crushing process according to the hardness and bonding characteristics of different coals.

Poor coal, lean coal, lean coal, etc. : These types of bituminous coal are relatively fragile. The low-speed operation and double-toothed roller design of mineral sizer can effectively prevent excessive damage to the coal during the crushing process and reduce the generation of debris.

Lignite

Lignite has the lowest degree of coalification, a high volatile matter content and a loose structure. Due to its high moisture content and low calorific value, more attention should be paid to the moisture characteristics of coal during processing.

For the processing of lignite, mineral sizer's design enables it to handle coal with a higher moisture content and a looser structure. During the crushing process, the crushing effect can be optimized and the clogging phenomenon reduced by flexibly adjusting the gap between the toothed rollers. Meanwhile, the low-speed operation of mineral sizer can reduce the generation of dust during the crushing process of lignite.

Different subtypes of bituminous coal (related to caking property)

This type of coal has strong cohesiveness and high plasticity and cohesiveness.

The double-toothed roller design of mineral sizer can effectively handle these coals, preventing the formation of excessive lumps during the crushing process of coal with strong adhesiveness. Meanwhile, the edge tooth plate can effectively clean the materials adhering to the crushing teeth during the operation of the equipment, preventing material blockage.

The design of the toothed roller can prevent excessive adhesion and blockage of coal during the crushing process by controlling the crushing force, especially when dealing with coal with weak adhesion and medium adhesion.

The technical advantages of Mineral sizer

Mineral sizer takes advantage of the fact that the compressive strength of coal, rock and other materials is much higher than their shear and tensile strength to crush the materials through shearing, splitting and other actions. This not only reduces the power consumption of crushing, but also ensures uniform output products and a low over-crushing rate.

The mineral sizer has a simple structure and uses double-toothed rollers to selectively crush materials. The materials under the limit that meet the particle size requirements in the feed are directly discharged without crushing, while only large pieces of materials are crushed. The resulting products all meet the particle size requirements, which endows it with dual functions of classification and crushing.

This not only effectively enhances the processing capacity of the equipment Moreover, it has simplified the sorting process flow. Therefore, mineral sizer has been able to develop rapidly with its unique technical features.

Compared with jaw type, hammer type, impact type and other types of crushers, mineral sizer is more suitable for coal crushing operations in terms of working principle, single-machine processing capacity, equipment reliability, crushing intensity, and product particle size control.

It has been widely used in the coal industry and its application scope has gradually expanded from surface coal preparation plants to underground coal mines and open-pit coal mines. It has now become one of the core equipment in the complete set of open-pit mining process systems.

Summary

Against the backdrop of the global growth in energy demand, the significance of crushing equipment in coal mining has become increasingly prominent. The large open-pit coal mine of the Mongolian KLC customer is located in the extreme grassland area with strict requirements for the adaptability of mining equipment.

Mineral sizer has advantages such as high efficiency, stability, wear resistance, and precise particle size control. It plays a key role in the open-pit coal mine crushing station of the Mongolian KLC customer, improving the overall production efficiency and benefits.