How Crushers Work
Mobile Jaw Crushing Plant
The crushing chamber of a jaw is a v-shaped cavity that consists of two jaws; one fixed and one movable. The movable jaw, also known as the swing jaw, is connected to an eccentric shaft that keeps the jaw continuously moving back and forth, opening and closing the jaw.
Rock enters the crusher through the feed opening at the top and is compressed between the two jaws. The chamber gets smaller as the rock moves through it until it’s been crushed small enough to fall through the opening at the bottom. This opening is the closed side setting (CSS), or the smallest size that can be crushed.
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Mobile Cone Crushing Plant
Cone crushers are another type of compression crusher. They consist of a fixed concave and a mantle that gyrates in an eccentric motion.
The mantle is continuously moving and provides a constantly changing gap at the bottom of the crushing chamber. The smallest size of the gap is known as closed side setting (CSS) and represents the smallest size of material that can be crushed. The largest opening is the open side setting (OSS) and represents the largest size of material that can be crushed.
Material being crushed is caught between the mantle and concave, where it is compressed with enough force to fracture and break . The material stays inside the crushing chamber until it is crushed fine enough to fall through the gap at the bottom of the crusher.
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Mobile Impact Crushing Plant
There are two types of impact crusher, Horizontal and Vertical Shaft Impactors.
Horizontal shaft impactors (HSI) use the striking force of blow bars attached to a spinning rotor to fracture rock as it enters the crusher. They have a larger feed opening, accept larger feed size and have a high reduction rate which makes them ideally suited as primary crushers.
Vertical Shaft Impactors (VSI) are used in the secondary or tertiary crushing stages. They produce a consistent cubical-shaped finished product for road base, manufactured fines (MF), concrete, and asphalt material.
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Whatever you need to crush.
Whether you need to crush 200,000 tonnes in a pit or quarry, or 2,000 tonnes of concrete recycling on a C&D job, we’ve got you covered with reliable, cost-effective crushing equipment from Powerscreen and Evoquip.