Jaw Crusher is a primary and secondary process crushing machine that uses compressive force for breaking the object. The compressing force comes from the two jaws of the crusher. It is a toggle crusher that contains a set of vertical jaws i.e. fixed jaw and stationary jaw.
This machine is designed to crush the large blocks of hard and abrasive materials. Each jaw crusher contains different types of liners. These robust jaw crusher liners not only improve the performance of the machine but also avoid unexpected downtime.
This article explains everything you need to know about jaw crusher liners. It covers different types of liners that enhance the productivity of the machines. Further, you will learn about different types of building materials of jaw crusher liners. So let’s get started…
Different Types of Jaw Crushers
There are three major types of jaw crushers based on the position of the pivoting of the swing jaw. Each type needs different types of jaw crusher liners. We will discuss different jaw crusher liners in the upcoming section. Here are three types of jaw crusher:
- Blake Crusher: In this type, the swing jaw in the crusher is stationary at the lower position. It contains further two types i.e. single-toggle and double toggle jaw crushers. Blake crusher comes with a variable discharge area but a fixed feed area.
- Dodge Crusher: In this dodge type jaw crushers, the swing jaw is stationary at the upper position. The jaws form a tapered chute. Due to this, the object is gradually crushed smaller and smaller as it moves down until the object becomes too small enough to escape from the bottom opening. Plus, it contains a variable feed area but a fixed discharge area.
- Universal Crusher: The universal type of jaw crusher contains the swing jaw fixed at the intermediate position. As the name suggests, it is the most powerful crusher that can crush the hardest stone.
Jaw Crusher Liners
Jaw crusher liners are very important parts of jaw crushing machines. Both types of jaws contain different types of liners that crush the abrasive and hard objects. These are sharp enough to crush the hardest and slippery stones. The liners have a strong grip over the crushing material. Therefore, the material can’t escape from the crusher.
You need to choose the appropriate type of liners based on the feed types. Some liners are more suitable for slippery rocks as compared to others. Similarly, some liners are specially designed to crush hard rocks and others for soft rocks. The liners of the jaw crusher come in multiple forms. Here are some most popular types of jaw crusher liners:
- Wide teeth liners
- Square tooth liners
- Sharp teeth liners
- Heavy-duty liners
- Coarse corrugated liners
- Tall tooth liners
- Corrugated liners
You should choose the high-quality liners for your jaw crushing machines. Because the liners don’t only boost the performance of crushing machines but also increase the life duration of the machines.
How to Choose Jaw Crusher Liners?
Jaw crusher liners are designed for different purposes. Therefore, their jaw structure, strength, feed material, and liner teeth vary from crusher to crusher. Each liner is suitable to crush specific types of objects. One liner works for one object but it will not work for another. So you need to choose jaw crusher liners very carefully.
You should always choose a liner based on the feed material types. Because feed material falls in multiple categories. For example, some feed materials are hard rock with UCS greater than 160 Mpa and others are soft rocks with UCS less than 160 MPa. Similarly, gravel, slabby soft rock, and slippery rocks are some other types of feed materials.
Complete Working of Jaw Crushers
Jaw crushers contain two jaws in which one is fixed and the other one is a swing jaw. Fixed jaw remains stationary and swing jaw moves back and forth relative to the fixed one. The area between the two jaws is known as the crushing chamber. Swing jaw moves slightly so the complete crushing is not performed just in a single stroke.
The power for crushing the objects come from the flywheel that produces an eccentric motion. This motion moves the swing jaw back and forth and applies force on the object. Both jaws are set at an acute angle such that one is fixed and the other one is a movable jaw. The moving jaw moves around the pivot and makes a strong impact on a stationary jaw. The material between both jaws is turned into pieces.
You need to change the liners frequently. It will increase the life span of crushing machines. If you can’t change the liners frequently, you should choose the right material for the liners. Plus, you can choose high-quality liners for the machine.
Material Used for Jaw Crusher Liners
Different jaw crusher liners are made of different materials based on the types of liners. The operators choose the material based on the strength of ore, size of the material, size of machine, corrosion environment, and some more factors.
However, you can choose the liner design and material according to your need and requirements. Below is the two most renowned construction material for jaw crusher liners:
- High Manganese Steel
It is the most popular and excellent abrasion-resistant material. High manganese steel is a non-magnetic austenitic material and its toughness enables shock leads to be absorbed safely. These plates become extremely hard when the surfaces of the components are subject to repeat abrasion.
High manganese steel contains almost 2 to 27% Mn content. Mn14Cr2, Mn18Cr2, and Mn22Cr2 are the main material for jaw crusher plates. This material works perfectly under stress. In addition to this, the substrate doesn’t lose its strength and has a great impact without any crack.
- Titanium Carbide
Titanium carbide is another most popular material used to manufacture jaw crusher liners. It is very appropriate for liners because of the higher hardness and wearable characteristics. The liners that are made of titanium carbide have 2 to 4 times more time span as compared to normal manganese steel liners.