Classification of mining crushers
Date：2019-08-07 16:53 Source：未知Views:
Mining crusher is also called stone crusher, which refers to the crushing machinery whose particle size is more than 3 mm, which accounts for more than 50% of the total discharge volume.Crushing operations are often according to the size of the feed and discharge particle size into coarse, medium and fine.The commonly used sand and stone equipment has jaw crusher, impact 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 molding crusher and so on.
1. Adjustable type
The adjustable fine crusher is mainly composed of rotary part, guard plate part and box body part.There are several cross non-overlapping hammer racks on the wheel core of the rotary part, and the hammer head is fixed on the hammer rack. The width of the hammer head is larger than the hammer frame and outline. The wheel core is welded into a whole by several Outlines and fixed on the main shaft.The two ends of the main shaft are supported on the rack by hydraulic bearings.The guard plate group is divided into several pieces fixed on the box body to protect the box body from wear and form different forms of counter crushing cavity.The latest adjustable fine crusher, equipped with hydraulic device, can be very convenient for the maintenance of the body inside, for the user to save a lot of time and cost.
2, jaw crusher
Jaw crusher is the first choice equipment for primary crushing, with the characteristics of large crushing ratio, uniform product granularity, simple structure, reliable operation, easy maintenance and economical operation cost, so it is widely used in many sectors such as mining, smelting, building materials, road, railway, water conservancy and chemical industry.
Jaw crusher is a crushing machine that crushes various hardness materials by squeezing and bending the materials with two jaw plates.The crushing mechanism is composed of fixed jaw plate and 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 block smaller than the discharge port is discharged from the bottom.It breaks intermittently.This kind of crusher has the advantages of simple structure, reliable work and crushing hard materials and is widely used in mineral processing, building materials, silicate and ceramics and other industrial sectors.Compared with hammer crusher, wear - resistant parts have long service time, high production efficiency and low investment.
3. Rotation equation
Gyratory crusher is a large crushing machine which USES the gyratory movement of the crushing cone in the cone cavity of the shell to crush, split and bend the material and break the ore or rock of various hardness.The upper end of the spindle with 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 rotates eccentrically around the center line of the machine.By the early 1970s, large rotary crushers were capable of handling 5,000 tons of material per hour, with a maximum feed diameter of 2,000 mm.
Rotary crusher with two ways to achieve discharge opening adjustment and overload insurance: one is the use of mechanical mode, the upper end of the spindle has an adjustment nut, rotating adjustment nut, broken cone can fall or rise, make discharge opening subsequently larger or smaller, overload, rely on cutting off the safety pin on the belt wheel to achieve insurance;The second is the use of hydraulic rotary crusher hydraulic mode, the main shaft is located in the hydraulic cylinder on the plunger, change the hydraulic oil volume under the plunger can change the crushing cone up and down position, so as to change the size of the discharge port.When overloaded, the downward pressure of the spindle increases, forcing the hydraulic oil under the plunger to enter the accumulator in the hydraulic transmission system, making the crushing cone drop down to enlarge the discharge port, and discharging the non-crushing objects (iron tools, wood blocks, etc.) that enter the crushing cavity with the material to achieve insurance.
Cone crusher is widely used in metal and non-metal ore, cement plant, sand and stone metallurgy and other industries.Suitable for all kinds of ores and rocks with medium and fine puhl hardness ≤5 ~ 16, such as iron ore, nonferrous metal ore, granite, limestone, quartzite, sandstone, pebble, etc
The working principle of cone crusher is the same as that of rotary crusher.The uniformity of discharge particle size 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 cavity, and at the same time, the revolving speed of crushing cone should be accelerated, so that the material can be squeezed more than once in the parallel zone.
The crushing of medium crushing operation is larger than that of coarse crushing operation, so the loose volume after crushing has a large increase.In order to prevent the crushing cavity from blocking, the total discharging section must be increased by increasing the diameter of the lower crushing cone without increasing the discharge port to ensure the required discharge particle size.
Cone crusher discharge mouth is small, mixed into the non-broken material in the feed is more likely to cause accidents, and because of the medium and fine crushing operation on the discharge particle size requirements, must be in the lining wear and timely adjustment of discharge mouth, so cone crusher insurance and adjustment device than coarse crushing operation is more necessary.