Jaw Crusher Machine

Jaw Crusher Machine are heavy duty machines. They are robustly manufactured. Jaw Crusher Machine consists of a main frame and two plates which move like jaws. Both jaws are adjusted to an intense angle to each other. First jaw is pivoted in such a manner that it moves relatively towards another fixed jaw. The movable jaw plate pivoted at the top on the swing-jaw shaft. In the jaw type of crusher oscillation of pivoted jaw is caused to motion by the action of toggles and pitman, that moves upside and down actuated by the eccentric through the medium of pulleys mounted on the drive shaft

Jaw Crusher Machine is primary used for crushing big lumps of slag. As the material fed into the Jaw Crusher Machine, Heavy duty hardened Jaw Crusher Machine the big lumps of slag in medium size which then goes to the next process.

Types of Jaw Crusher Machine

• Single Toggle Jaw
• Double Toggle Jaw

Depends upon the hardness of Slag (e.g. Induction furnace slag of Arc furnace slag.) Jaw crusher also used by various industries for crushing stone, coal, hard coke, refectory, ferro manganese, iron ore, etc.

Crushing Process of Jaw Crusher Machine

In order to make use of the rocks or ores obtained through quarrying/explosion in the Mining and Construction sectors, the materials need to be crushed to reduce them to a smaller size. We call this process SIZE REDUCTION or CRUSHING.

The goals of the size reduction are as follows:

1. Obtaining the size or surface area required for the use of the ore or material
2. Allowing ease of transportation and storage
3. Separating the different minerals contained within the ore and to release them from one another
4. Obtaining the size or surface area required for the enrichment stage.

In general, crushing is carried out in three stages, depending on the desired size of the material.

Primary Crushing

This is the first stage of the crushing process. In general, the size of the feed material, which is between 800 and 1500 mm, is reduced to between 150 and 300 mm.

Secondary Crushing

This is the second stage of crushing. Feed size, which is around 150 to 300 mm, of the rock or ore from the primary crushing process is reduced to between 50 and 80 mm.

Tertiary Crushing

This is the third stage of crushing. The size, which is around 50–80 mm, of the ore or rock from the secondary crushing process is reduced to between 5 and 12 mm.

Technical Specifications of Jaw Crusher Machine

• Single Toggle Jaw Crusher Machine
• Machine body thickness is 70mm.
• Crusher body is fabricated with CO2wielding and the body is stress relived.
• EN19 Harden & grinded eccentric shaft is provided.
• Adapter type fly wheel (easy to remove assemble in site itself).
• In 150mm setting total crushing capacity is 150 tons/hr.
• In 100mm setting total crushing capacity is 100 tones/hr.
• Machine runs in oil lubrication bearing are sealed with double oil seal.
• 140 gear oil is used for lubrication.
• 100 liter oil tank with oil hoses are provided.
• Drain valve provided to avoid oil leakage.
• Sensors are fitted in the oil tank after the oil rotation only machine main motor will start.
• Oil change time is 600/hr.
• Hour meter is provided to check the oil change intervals.
• Pressure gauge is provided to monitor the oil pressure.
• Oil cooler provided in the oil tank to reduce the temperature of the oil.
• Hydraulic pump given for jaw stock adjustment.
• Machine runs with 100 HP 1440 RPM.
• Feeding size (21”inches).
• NTN Bearing used (Bearing No: 23152 / 23144).
• Front and back brackets are Steel casting.
• Machine runs in 300 RPM.
• Machine weight 20 Tons.

How Jaw Crusher Machine Work

A Jaw Crusher Machine uses compressive force for breaking material. This mechanical pressure is achieved by the crusher's two jaws dies, one of which is stationary and the other is movable. These two vertical manganese jaw dies create a V-shaped cavity called the crushing chamber, where the top of the crushing chamber is larger than the bottom. Jaw Crusher Machines are sized by the top opening of the crushing chamber. For example, a 32 x 54 Jaw Crusher Machine measures 32" from jaw die to jaw die at the top opening or gape opening and 54” across the width of the two jaw dies.

The narrower bottom opening of the crushing chamber is used to size the discharge material. A toggle plate and tension rods hold the pitman tight near the bottom of the moving swing jaw. The toggle plate is designed to perform like a fuse and protect the crusher in the event that an uncrushable material enters the crushing chamber. As a rule, Jaw Crusher Machines have a 6:1 or 8:1 ratio for crushing material. Still using the 32 x 54 Jaw Crusher Machine example, the top size of the feed entering the crushing chamber has to follow the F80 rule that 80% of the top size feed material is smaller than the gape opening. Using the F80 rule with the 32 x 54 Jaw Crusher Machine, the 32” gape opening equals a 26” top sized feed, and with the 6:1 ratio of reduction, the discharge setting would be around 4”.

Since the crushing of the material is not performed in one stroke of the eccentric shaft, massive weighted flywheels are attached to the eccentric shaft and powered by a motor. The flywheels transfer the inertia required to crush the material until it passes the discharge opening.