The 4 Most Commonly Used Kinds of Concrete Crusher
These machines are designed to reduce unwanted chunks of concrete into smaller rocks or even dust that can more easily be recycled or disposed of. Following is a rundown of the various types of concrete crusher in use today.
1. Jaw Crushers
The processes of crushing concrete can be separated into stages. In the first stage, large pieces of demolished structures are reduced to a more workable size. Most commonly, jaw crushers are employed in this stage. These machines can admit materials of all sizes and have a reduction ratio of 3/1 to 5/1. So named because their operation looks like chewing, jaw crushers employ a simple design. A tapered chute is created between two slabs of reinforced metal. One plate is fixed while the other toggles back and forth. chunks of cement are crushed progressively smaller as they fall through through the chute.
Depending on the intended use, often the resulting pieces of concrete are further reduced in size by a secondary concrete crusher. In this stage, the most common devices are cone crushers and impact crushers. In each case, the name derives from the way the mechanism works.
2. Cone Crusher
A cone crusher consists of a concave space that tapers at the bottom (the cone), fitted with a moving spindle. Material introduced at the top of the machine is compressed between these two parts until crushed. The pieces fall though the gap to a lower level where they are crushed smaller, and so on until the pieces are small enough to fall through the bottom of the machine. Like a jaw concrete crusher, cone crushers effect a 3/1 to 5/1 reduction ration. These devices can range in size from very large to small and portable.
3. Impact Crusher
An impact crusher is a concrete crusher that uses striking force instead of pressure. Within this category, there are two main distinctions: horizontal and vertical shaft impactors. A horizontal impact concrete crusher utilizes a metal container that holds the material which is then pounded by hammers mounted on a spinning rotor. There are gaps at the bottom and side of the container that allow material of the desired size to be pushed out. This kind of concrete crusher is generally only useful for softer materials, though it can achieve a reduction ratio of 25/1.
4. Vertical Shaft Crusher
A vertical shaft concrete crusher uses velocity instead of surface force. Material to be processed is flung from a high speed rotor so that it smashes against a hard interior surface and shatters. Final particle size can be controlled by the speed of the rotor and the distance between the rotor and the containing wall, or anvil. This kind of concrete crusher has many practical applications for recycling because it produces processed material of a more regular quadratic shape. This concrete crusher can achieve a reduction ratio of 8/1.
Due to the overabundance of concrete construction taking place all over the world, there is no doubt that the concrete crusher will remain an essential tool within the industry. While we may see occasional developments in the materials and resulting efficiency of crusher technology, concrete crushers as we know them are here to stay.