Application of impact crusher in cement production line

The impact crusher is mainly responsible for the crushing of large bulk materials such as limestone in cement production line. Its application advantages are reflected in efficient crushing, particle shape optimization, energy saving and consumption reduction, strong adaptability and convenient maintenance. The specific analysis is as follows:

1、Core crushing function: efficient processing of large bulk materials
In cement production, limestone is the main raw material, and it has large particle size and high hardness after mining. The impact crusher drives the plate hammer to impact the material through the high-speed rotation of the rotor. The material is repeatedly crushed between the impact plate and the plate hammer, and finally forms uniform cubic particles. Its multi-stage impact chamber design (such as the first and second stage impact chambers and the bottom grinding chamber) provides sufficient crushing space, which can handle materials with a side length of 100-500 mm, and the compressive strength is up to 350 MPa, which meets the requirements of cement production for raw material particle size.

2、Particle shape optimization: improve cement quality
The impact crusher breaks the material along the joint layer through the cycle of “impact-rebound-re-crushing”, and the output is in a cubic shape with low needle-like content. This particle shape is conducive to the uniformity of subsequent raw material grinding, improves the burning quality of cement clinker, and ultimately improves the strength and stability of cement products.

3、Energy saving and consumption reduction: reduce production costs
Gradually crushing design: the material is gradually crushed in the multi-stage impact chamber, reducing the energy consumption of a single impact, and can reduce energy consumption by 15%-20% compared with the jaw crusher.
Hydraulic adjustment system: the gap between the impact plate and the rotor is adjusted by a hydraulic device to accurately control the particle size of the discharge material, avoid excessive crushing, and further save energy.
High metal utilization rate: the plate hammer wear only occurs on the side facing the material, with a utilization rate of 45%-48%, and only 6 plate hammers need to be installed on the rotor. It only takes one shift to replace a set of plate hammers, reducing the cost of spare parts.

4、Strong adaptability: cope with complex working conditions
Wet material processing capacity: the feed chute and the impact plate can be equipped with a heating device to prevent material adhesion, effectively handle materials with a large water content, and avoid blockage.
Overload protection mechanism: The impact plate adjustment system has an overload protection function. When foreign matter (such as iron blocks) enters the crushing chamber, the impact plate automatically retracts and bounces up to prevent equipment damage.
Wide hardness range: It can crush soft materials (such as clay) and hard materials (such as limestone), and the energy consumption is lower than that of the hammer crusher, which meets the diverse needs of raw materials in cement production.

5、Convenient maintenance: Reduce downtime
Screenless design: Overcome the blockage problem caused by high material humidity in traditional crushers and reduce the frequency of downtime cleaning.
Easy replacement of wearing parts: The plate hammer adopts a mechanical clamping structure, and the rotor can rotate forward and reverse, so that the hammer head and crushing plate are evenly worn and the service life is extended; the large machine uses a hydraulic cylinder to open the crushing chamber, which is convenient for replacing wearing parts.
Sealing process: The bearing end cover adopts a labyrinth seal to prevent stones from entering the bearing, extend the bearing life and reduce maintenance costs.

6、Application Cases and Industry Recognition
Large-scale cement production line: The impact crusher launched by Henan Dingwang Mining and Metallurgy is specially designed for large-scale cement production. It performs well under conditions of heavy rainfall, dry materials, and high soil content. It is simple to operate and easy to maintain, and improves the labor intensity of workers.
Environmental protection and resource utilization: In the treatment of construction waste, the impact crusher crushes concrete blocks into recycled aggregates, realizes resource recycling, and is in line with the green development trend of the cement industry.
Technology upgrade: With the breakthrough of wear-resistant materials, domestic hard rock impact crushers have been exported to Europe, the United States, and Japan in large quantities, and are widely used in highways, railways and other projects, verifying their reliability and advancement.