Jaw Crusher

Jaw Crusher Introduction

A jaw crusher is a crushing machine that crushes materials by simulating the jaw movement of animals. It can process various minerals with Mohs hardness ≤9 and is widely used in mining, sand and gravel, aggregate, metallurgy, building materials and many other industries. According to crushing process and finished particle size, it is divided into primary coarse crusher and secondary fine crusher. In the Raymond mill grinding process, the coarse crusher (PE series) is generally used for pre-crushing with coarser discharge. The fine crusher (PEX series) is adopted in multi-stage crushing process to further reduce coarse materials into finer particles. Both of them provide ideal feed materials for the grinding process and effectively improve the economic efficiency of the whole grinding production line.

Features & Advantages of Jaw Crusher

Coarse Jaw Crusher

Wide adaptability: Equipped with large feed opening, it can handle minerals up to 1250mm, and process various minerals with Mohs hardness ≤9.

High-efficiency crushing: It features a large crushing ratio. While breaking large mineral blocks into medium and small particles, it guarantees uniform output size.

Stable & reliable: Made of high manganese steel wear-resistant material, it boasts strong impact resistance and wear resistance, capable of withstanding heavy crushing impact and delivering stable crushing performance.

Simple & convenient: Simple structural design facilitates installation, disassembly and daily maintenance, greatly cutting downtime and maintenance costs.

Fine Jaw Crusher

High crushing ratio: Specially designed crushing chamber and moving jaw motion track bring high crushing ratio (≥10), delivering finer and more uniform discharge size.

High efficiency & low consumption: Optimized moving jaw suspension point and toggle plate angle improve crushing efficiency and reduce unit energy consumption.

Excellent wear resistance: The moving jaw plate and fixed jaw plate are manufactured with high-strength wear-resistant materials for outstanding wear performance.

Uniform crushing: Specially optimized tooth profile design on jaw plates ensures even distribution of crushing force and extends service life of wear parts.

Working Principle of Jaw Crusher

Materials enter the crushing chamber through the feed opening and stay between moving jaw plate and fixed jaw plate. The motor drives the eccentric shaft to make the moving jaw plate reciprocate periodically. When the moving jaw plate approaches the fixed jaw plate, materials are crushed under extrusion and shearing force (compressive strength ≤320MPa). When the moving jaw plate moves away, crushed materials are discharged from the discharge opening by gravity. The machine is equipped with hydraulic adjustment system to flexibly control discharge opening size and precisely adjust finished particle size. A vibrating screen can be equipped for grading and screening as required.

Application Scenarios of Jaw Crusher

Technical Parameters of Jaw Crusher

Frequently Asked Questions About Jaw Crusher

How to select the suitable jaw crusher?

Primary Jaw Crusher: Suitable for the first-stage primary crushing, processing large lumps of minerals. It outputs coarse material and applies to scenarios with low requirement on feed size of grinding mill or raw material with small particle size.

Fine Jaw Crusher: Used in multi-stage crushing to further crush primary crushed material into finer and uniform particles. Normally used in grinding production line for powder ≤325 mesh.

How to match the capacity of jaw crusher and Raymond mill?

Configure crushing capacity at 1.1~1.2 times the maximum demand of Raymond mill, and install buffer silo to provide continuous, stable and uniformly sized feeding for grinding process, avoiding impact on continuous operation of Raymond mill caused by crusher shutdown or capacity fluctuation.

What to do if severe wear of jaw crusher affects Raymond mill production?

Immediately reduce discharge opening to restore output particle size. Common cause is mismatch between material hardness and jaw plate material. Upgrade jaw plate material (e.g. high manganese steel / composite alloy) and optimize tooth profile. Meanwhile, install pre-installed magnetic separator.