Stone Crusher

Cone Crushers

CONE CRUSHERS

How Does a Cone Crusher Work?

Cone crushers are straightforward pieces of equipment, which makes it easy to understand.

It all starts with the material you need to crush, which is known as the feed. The feed drops into the crushing chamber, which is a large circular opening at the top of a cone crusher. Inside the crusher, a moving part which is known as the mantle gyrates inside the machine.

The mantle moves eccentrically, which means that it doesn’t travel in a perfect circle. The mantle can swing slightly while it rotates, which continuously alters the gap between the mantle and the concave.

The concave is a fixed ring that’s outside of the mantle. As the mantle swings, it crushes the material against the concave. Stones are crushed against each other, which breaks it down further. This concept is known as interparticle crushing.

The Sides of the Crusher

A cone crusher has two sides: an open side and a closed side. As the material crushes, the particles that are small enough to fit through the open side fall through the space between the mantle and the concave.

As the mantle gyrates, it creates a narrow point and a wide point. The distance on the wide side is known as the OSS or open side setting, while the narrowest point is called the CSS, or closed side setting.

Depending on how the OSS is set, it will determine the size of the particles as they exit the crusher. Meanwhile, since the CSS represents the shortest distance between the concave and the mantle, this is the final crushing zone. How the user configures the CSS is critical for determining capacity, energy consumption and final product size.

The Symons Principle

Many cone crusher manufacturers use the Symons Principle to produce more powerful and efficient crushers.

Based on this principle, each rotation of the mantle is timed in a way so that the thrust of the mantle meets the feed material at the point of maximum impact.

By ensuring that the crusher meets the material at the moment of highest impact, the closing head catches falling material and crushes it while the other side of the chamber can allow material to freely exit the chamber, or fall to the next point of impact.

This premise allows manufacturers to produce cone crushers that enable the user to increase production while also reducing the amount of energy the crusher requires to run.

Reference;

(5) https://www.aggregateequipmentguide.com/article/48642-detailed-overview-cone-crushers-what-you-need-to-know

Cone Crusher

CONE CRUSHERS

How Does a Cone Crusher Work?

Cone crushers are straightforward pieces of equipment, which makes it easy to understand.

The Sides of the Crusher

The Symons Principle

Many cone crusher manufacturers use the Symons Principle to produce more powerful and efficient crushers.

Based on this principle, each rotation of the mantle is timed in a way so that the thrust of the mantle meets the feed material at the point of maximum impact.

This premise allows manufacturers to produce cone crushers that enable the user to increase production while also reducing the amount of energy the crusher requires to run.

Reference;

(5) https://www.aggregateequipmentguide.com/article/48642-detailed-overview-cone-crushers-what-you-need-to-know

What are Cone Crushers used for?

What are Cone Crushers used for ?

CONE CRUSHER BASICS IN 4 MINUTES

This is the starting point for understanding how cone crushers work — and how they can make your mine or quarry more productive.

Elsewhere on the site you can find detailed information about all aspects of crushing and screening, but to make sense of these it helps to understand the basics of cone crushing. That’s what you’ll find here!

Inside your cone crusher

The basic principle is straightforward: the material to be crushed (the feed), drops into the crushing chamber. The mantle is a moving part that gyrates in an eccentric motion.

That is, it doesn’t remain completely centred — it swings slightly as it rotates, continually altering the gap between the mantle and the concave (the ring outside the mantle that stays fixed in place.)

As the mantle moves, it crushes the material against the concave at the points where the gap is smallest (the stones in the feed are also compressed against each other — that’s known as interparticle crushing).

The open side and the closed

As the feed is crushed, it falls and exits the crusher through the space at the bottom. The eccentric gyration of the mantle means that at any moment this space is narrowest at one point, and widest at the opposite point. The widest distance is known as the open side setting (OSS) and the narrowest, the closed side setting (CSS).

These settings are important. The OSS is the largest distance between the concave and the mantle at the bottom of the crusher, so it determines the largest particle size of the outgoing product.

As the smallest distance between the concave and the mantle, the CSS is the final crushing zone, and is vital for determining the product size, as well as energy consumption and crusher capacity.

Know your feed!

It’s hard to overstate the importance of feed size in a cone crusher. It is vital that you know, as accurately as you can, the size distribution of the raw material.

The Sandvik CH cone crusher can be calibrated to achieve specific results, maximize productivity and minimize wear, but any calculation will be undermined without a solid understanding of what is going in to the crusher.

Sampling is a vital part of the crushing process, to ensure that you know the size distribution of the feed. It’s crucial that sampling is done regularly, especially when there are changes in blasting, mining or any other upstream processes.

Reference;

Mechanical Eng. Msc Suphi Yavuz, Başak Yavuz Makine, Technical Notes

Mining Eng. Msc Necati Yıldız, Ore Dressing and Enrichment Book

Mac. Eng. Yusuf ARMAN

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