Cone crusher is the first choice of crushing equipment in mining, cement plants and metallurgical industries. Its crushing effect is mainly reflected in two aspects: medium crushing and fine crushing. In short, the material particles after medium crushing are larger, usually not exceeding 20mm, which is suitable for occasions with loose requirements on particle size; while fine crushing can crush the material into fine particles below 5mm, meeting the scenes with strict requirements on particle size. This difference is not only reflected in the particle size of the final product, but also reflects different crushing requirements. The core reasons for choosing cone crusher in the medium and fine crushing stage are analyzed as follows:

 

Crushing principle and performance advantages 

 

1. Laminated crushing mechanism

 

The cone crusher adopts a unique laminated crushing principle, which realizes ore crushing through continuous extrusion and bending between the moving cone and the fixed cone. This mechanism can make the material be subjected to force multiple times in the crushing chamber, effectively improving the crushing efficiency and ensuring uniform particle size of the finished product.

 

Example: For metal associated ores such as granite and basalt with a hardness of ≥300MPa, the laminated crushing capacity of the cone crusher is significantly better than the impact crushing method of the impact crusher.

 

2. High processing capacity and low energy consumption

 

The swing motion design of the cone crusher enables its processing capacity per unit time to reach 2181 tons/hour (depending on the model), and the unit power consumption is 15%-30% lower than that of traditional crushing equipment. For example, Dahua Heavy Industry's cone crusher achieves a 20% increase in production capacity while reducing energy consumption by optimizing the hydraulic system.

 

Technical advancement of structural design

 

1. Hydraulic protection and automatic control

 

Equipped with a hydraulic cavity clearing system and an overload protection device, when encountering unbreakable objects or overload, the discharge port can be automatically expanded to discharge foreign objects to avoid equipment damage. The fully automatic control system supports precise adjustment of the discharge particle size (error ≤5mm), significantly improving production stability.

 

2. Parallel crushing zone to optimize particle size

 

A parallel zone structure is set at the bottom of the crushing chamber so that the material is squeezed multiple times in this area to ensure that the finished product particle size is concentrated within the target range (such as 5-25mm fine crushing material accounts for ≥80%), which is particularly suitable for mineral processing and building materials scenes with strict particle size requirements.

 

Economic efficiency of materials and maintenance

 

1. Extended life of wear-resistant parts

 

Using materials such as high manganese steel linings and composite ceramic hammers, the life of key components is 2-3 times longer than that of traditional equipment. For example, the replacement cycle of the lining of the cone crusher used in an iron ore project can reach 6 months, which is 40% longer than that of the impact crusher.

 

2. Reduced maintenance costs

 

The grease sealing system avoids the clogging problem of traditional water seals, and combined with modular design (such as quick replacement of crushing wall technology), the maintenance time is shortened by more than 50%.

 

Application scenario adaptability

 

1. Advantages of high-hardness material processing

 

Cone crushers are particularly suitable for processing metal ores such as iron ore and copper ore (compressive strength ≤550MPa), while impact crushers are usually only suitable for medium and low hardness materials ≤350MPa (such as limestone). For example, in the fine crushing of molybdenum ore, the yield of cone crushers is 25% higher than that of hammer crushers.

 

2. Environmental protection and resource utilization needs

 

With high-pressure roller grinding technology, cone crushers can crush tailings to less than 3mm, promote metal recovery rate to 95%, and help mines achieve the goal of "waste-free mining".

 

Selection suggestions: For metal mines, large sand and gravel aggregate production lines, and other scenes that require fine crushing of high-hardness materials, cone crushers have significant advantages in energy efficiency, finished product quality, and long-term operating costs. The specific selection needs to be combined with ore characteristics (such as moisture content, clay content) for technical and economic comparison.