Mining crusher is also called stone crusher machine
. It refers to the crushing machine whose grain size is more than 3 millimeters, which accounts for more than 50% of the total discharge. It was invented by Heng'an, an Englishman. Crushing operations are often divided into coarse crushing, medium crushing and fine crushing according to the size of feeding and discharging granularity.
How many types of crushers are there?
The commonly used sand and stone equipment includes jaw crusher, impact crusher, compound crusher, single section hammer crusher, vertical crusher, rotary crusher, cone crusher, roll crusher, double roll crusher, two-in-one crusher, one-time forming crusher and so on.
1. Adjustable type
The adjustable fine crushing machine is mainly composed of a rotating part, a protecting plate part and a box part. On the wheel core of the rotary part, there are several cross and non-overlapping hammer frames, and the hammer head is fixed on the hammer frame. The width of the hammer head is larger than the hammer frame and outline. The wheel core is welded together by several Outlines and fixed on the spindle. Both ends of the spindle are supported on the frame with a hydraulic bearing seat. The protective plate group is fixed on the box body in several pieces to protect the box body from abrasion and form different forms of counter crushing cavity. The latest type of adjustable fine crushing machine, equipped with hydraulic device, it is very convenient to carry out the maintenance work inside the fuselage, saving a lot of time and cost for the user.
2. Jaw crusher
Jaw crusher, is the first class crushing preferred equipment, it is widely used in many sectors such as mining, smelting, building materials, highway, railway, water conservancy and chemical industry because of its characteristics such as large crushing ratio, uniform product size, simple structure, reliable work, simple maintenance and economic operation cost.
Jaw crusher is a crushing machine that crushes various hardness materials roughly or moderately by using the extrusion and bending of two jaw plates. The crushing mechanism consists of a fixed jaw plate and a movable jaw plate. When the two jaw plates are close to each other, the material is broken. When the two jaw plates leave, the material blocks smaller than the discharge port are discharged from the bottom. Its crushing action is intermittent. This crusher is widely used in mineral processing, building materials, silicates and ceramics industries because of its simple structure, reliable operation and the ability to crush hard materials. Compared with cone crusher, jaw crusher has less investment, less finished stone and lower production cost. Compared with hammer crusher, wear-resistant parts have longer use time, higher production efficiency and lower investment in the later period.
By the 1980s, the feed size of the large jaw crusher, which crushes 800 tons of materials per hour, had reached about 1800 mm. The common jaw crusher has two kinds of double elbow plate and single elbow plate. The former is called simple swing jaw crusher because the swing jaw only swings in a simple arc. The latter is also called complex swing jaw crusher because of its up and down motion as well as arc swing. The jaw crusher is widely used in crushing all kinds of materials whose compressive strength does not exceed 320 mpa.
How the jaw crusher works: the first crusher is usually called the "main" crusher in the process of breaking large stones into small stones. The longest and strongest crusher in history is the jaw crusher. When feeding the jaw crusher, the material is poured from the top entrance into the crushing chamber containing the jaw teeth. The jaws push the material against the wall with great force, breaking it into smaller stones. An eccentric shaft supports the jaw movement, which runs through the fuselage frame. Eccentric motion is usually caused by flywheels fixed at both ends of the shaft. Spherical roller bearings are often used in flywheel and eccentric support bearings. The working environment of bearings is extremely harsh. Bearings must bear tremendous impact loads, abrasive sewage and high temperature. Despite the harsh working environment, the crusher still needs to work very reliably, which is the key to ensure the production efficiency.
3. Rotary type
The rotary crusher is a large-scale crushing machine which uses the rotary movement of the crushing cone in the cone cavity of the shell to produce extrusion, splitting and bending effects on the materials and crushes the ores or rocks with various hardness. The upper end of the spindle with the crushing cone is supported in the bushing in the middle of the beam, and the lower end is placed in the eccentric hole of the shaft sleeve. When the shaft sleeve rotates, the crushing cone makes eccentric rotary motion around the central line of the machine, and its crushing action is continuous, so the working efficiency is higher than that of the jaw crusher. By the early 1970s, the large rotary crusher has been able to process 5000 tons of materials per hour, the maximum feeding diameter can reach 2000 mm.
The gyratory crusher realizes the adjustment of discharge opening and overload insurance in two ways: One is to adopt mechanical mode, with adjusting nuts at the end of the spindle, and to rotate the adjusting nuts. The broken cone can be lowered or raised, which makes the discharge outlet larger or smaller. When overload occurs, the insurance pin on the drive pulley is cut off to realize the insurance. The second is hydraulic rotary crusher, whose spindle is located on the plunger in the hydraulic cylinder. Changing the volume of hydraulic oil under the plunger can change the position of the crushing cone, thus changing the size of the discharge port. When overload occurs, the pressure under the main axis increases, forcing the hydraulic oil under the plunger into the accumulator in the hydraulic transmission system. It reduces the crushing cone to increase the discharge port, and discharges the non-crushing materials (iron, wood, etc.) which enter the crushing chamber with the material to realize the insurance.
4. Cone crusher
Cone crusher is widely used in metal and non-metal ore, cement plant, sandstone metallurgy and other industries. It is suitable for all kinds of ores and rocks with medium and fine Pu's hardness less than 5-16, such as iron ore, nonferrous metal ore, granite, limestone, quartzite, sandstone, cobblestone, etc. The working principle of conical crusher is the same as that of rotary crusher, but it is only suitable for crushing machinery with medium or fine crushing operations. The uniformity of discharging granularity of medium and fine crushing operations is generally higher than that of coarse crushing operations. Therefore, a parallel zone should be set at the lower part of the crushing chamber, and the rotation speed of the crushing cone should be accelerated so that the material can be extruded more than once in the parallel zone. The crushing of medium and fine crushing operation is larger than that of coarse crushing operation, so the loose volume after crushing will increase greatly. In order to prevent the blockage of the crushing chamber, the total discharge section must be increased by increasing the diameter of the lower part of the crushing cone without increasing the discharge outlet to ensure the required discharge size.
The discharge port of cone crusher is small, and the non-crushed materials mixed into the feed are more likely to cause accidents. Because of the strict requirement of discharging granularity in medium and fine crushing operation, the discharging outlet must be adjusted in time after the liner is worn out, so the safety and adjusting device of cone crusher is more necessary than that of coarse crushing operation.
When the Simon spring-insured conical crusher is overloaded, the conical shell forces the spring to compress and raise itself so as to increase the discharge port and discharge the non-crushed materials. The adjustment of discharge outlet depends on the adjusting sleeve. By turning the adjusting sleeve fixed with the shell, the shell can be driven up or down by the thread on its outer circle, so as to change the size of discharge outlet. The insurance and adjustment of hydraulic cone crusher are the same as that of hydraulic rotary crusher.
What is the difference between jaw crusher and cone crusher?
The jaw crusher is normally used as primary crusher. It is mostly suitable for hard materials and the wear cost are lower than the impact or cone crusher. The main difference is that you can get bigger productivity with the cone crusher by lower materials size as with the jaw crusher.
Aggregate that can be crushed
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