The principle of Gyratory crushers it the of compression. A gyratory cone crusher includes a solid cylinder set on a rotating shaft and placed within a cylindrical shell having conical or vertical sloped sides.Â
Material is crushed between the moving surface and the stationary surface of the cone or between the moving surface and the inner wall of the shell. Crushed material falls through an outlet port into a discharge chamber.
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Gyratory Crusher ConstructionÂ
It consists of a funnel-shaped casing, open at the top. A conical crushing head, in the form of a truncated cone, gyratory inside a casing. The crushing head is mounted on a heavy shaft pivoted at the top of the machine. The upper end of the shaft is held in a flexible bearing and the lower end of the shaft is driven by an eccentric to describe a circle.
At any point on the periphery of the casing, therefore, the bottom end of the crushing head moves towards, and then away from the stationary wall. The crushing action takes place around the whole of the cone and as the maximum movement is at the bottom, the characteristics of the machine are similar to those of the Blake crusher.
Gyratory Crusher Working
The material to be crushed is changed from the top. The conical head gyrates inside the casing. At any point on the periphery of the casing, the bottom of the crushing head moves towards, and then away, from the stationary wall.Â
The solids caught in the V-shaped space between the head and the casing is broken and rebroken until they are discharged from the bottom. The speed of the crushing head is usually 125 to 425 gyrations per minute. As some part of the crushing head is working at all times, the discharge from this crusher is continuous instead of intermittent as in a Blake crusher.
Advantages and DisadvantagesÂ
As the crusher is continuously in action, the fluctuations in stresses are smaller the load on the motor is nearly uniform and the power consumption per ton of a material crushed is lower.
It requires less maintenance than a jaw crusher.
It will not take large-size feed as a jaw crusher, but it will give rather finer and more uniform products.
To produce a small size reduction, it has a large capacity.
As the capital cost of this crusher is high, it is suitable only when large quantities of materials are not to be handled.Â
Metso gyratory crusherÂ
Metso is a Finnish company that has been in the mining and aggregates industry for more than 150 years. It was established in 1865 by Karl Emil Metso. The company is based in Helsinki, Finland, and it has offices all over the world.
Metso gyratory crusher is a machine that processes raw materials by crushing them into smaller pieces of various sizes to enable easier separation of different minerals from each other.
In this section, we will be discussing the Metso gyratory crusher and its use cases.
Difference between Jaw Crusher and Gyratory Crusher
Jaw Crusher
It is a reciprocating machine.
Intermittent in action, i.e. discharge is discontinuous.
It is a primary crusher. It takes a feed of larger size.
The load on the motor is not uniform.
More maintenance is required.
Power consumption per ton of material crushed is more.
Capital cost is relatively low.
It has a smaller capacity when used to produce/effect a small-size reduction.
Gyratory Crusher
It is a gyratory crusher machine.
Continuous in action i.e., discharge is continuous.
It is a secondary crusher. It takes a feed of smaller size.
The load on the motor is nearly uniform.
Less maintenance is required.
Power consumption per ton of material crushed is lower.
Capital cost is high.
It has a large capacity when used to produce/effect a small size reduction.
Take these Notes is, Orginal Sources:Â Unit Operations-II, KA Gavhane