What does the crusher usually work with
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1. Calculate I = Dmax / Dmax by the ratio of the maximum particle size of the material before crushing and the maximum particle size of the proct after crushing, where Dmax is the maximum particle size of the material before crushing; dmax― http://www.ysxuankuang.com/cpzx.html - the maximum particle size of the material after crushing
2. The ratio of the effective width of the feeding port and the width of the discharging port of the crusher
I = 0.85b/b
where
b --- the width of the feeding port of the crusher; B --- Crusher & lt; Width of discharge port
0.85 -
ensure the effective width of the crusher gripping the material. The maximum width of discharge port is selected for coarse crusher; Take the minimum width of discharge port for middle crusher
3. Calculate with average particle size
I = DCP / DCP
where
DCP - average diameter of material before crushing; DCP - average diameter of crushed material. The crushing ratio obtained by this method can truly reflect the crushing degree of sand and stone equipment.
The working principle of different types of crushers is different. The following are the working principles of several crushers:
1. The working principle of heavy hammer crusher: the motor drives the rotor to rotate at high speed in the crushing chamber, and the materials are fed into the crusher from the upper feeding port, and are crushed by the impact, impact, shear and grinding of the high-speed hammer
in the lower part of the rotor, there is a sieve plate, and the particles smaller than the size of the sieve hole are discharged through the sieve plate, while the coarse particles larger than the size of the sieve hole are retained on the sieve plate and continue to be hit and ground by the hammer, and finally discharged out of the crusher through the sieve plate
2. Working principle of impact crusher: when the machine is working, driven by the motor, the rotor rotates at high speed, and when the material enters the action area of the plate hammer, it collides with the plate hammer on the rotor to break
is thrown to the impact device and broken again, and then bounced back from the impact liner to the plate hammer action area and broken again, this process is repeated
from large to small, the material enters the first, second and third impact chambers for repeated crushing until the material is crushed to the required particle size and discharged from the discharge port. Adjusting the clearance between the impact frame and the rotor can change the material size and shape
extended data:
heavy hammer crusher predicted failure causes and elimination methods
increased vibration when replacing or assembling the hammer, the rotor is not well balanced, the hammer is removed, and the hammer quality is selected according to the requirements, Make the total mass of hammer on each row of hammer shaft and its relative hammer mass meet the requirements
rece the proction capacity
1. The gap of screen bar is blocked
2. Uneven feeding 1. Remove the plug in the gap of screen bar after parking
2. Adjust the feeding mechanism
to proce knocking sound inside the machine
1. The materials that cannot be broken enter the inside of the machine
2. The fastener of lining plate is loose The hammer or other parts are broken 1. Clean the crushing chamber after parking
2. Check the fastening condition of lining plate and the common faults and repair methods of hammer and screen bar
1. If the vibration of impact crusher is abnormal:
1. It indicates that the material is too large, you can check the feeding size
2. Uneven wear indicates that the impact hammer needs to be replaced
The rotor is unbalanced and needs to be adjusted4. The foundation should be checked and reinforced e to improper foundation treatment
Second, if the impact crusher bearing is found to be hot:1. The bearing is short of oil and needs to be refueled in time. Of course, too much oil will also make the bearing hot. The oil level must be checked when refuelling
If the bearing is damaged, the bearing should be replaced in time If the upper cover is too tight, the bolts should be adjusted properly and the tightness should be moderate (3) if it is found that the discharge particles of impact crusher are too large:1. It indicates that the hammer head is worn and needs to be adjusted or replaced
The clearance between hammer head and impact plate is too large, generally adjusted to 15-20 mm3, too large feed particle size will also affect the discharge particle size
4. If the impact crusher belt turns over:1. The belt is worn and needs to be replaced
2. Because of the assembly problem of the belt conveyor, the pulley should be adjusted on the same plane
5. Model parameters of impact crusher
repair method
1. The front impact plate suspender and the rear impact plate suspender of impact crusher are combined to improve the elastic vibration of impact plate, so that the materials bonded on the impact plate can be sent to the crushing shell in time, With the crushed material, it enters into the lower bin
2. Recovery and repair of impact plate of high manganese steel impact hammer. For the worn hammer, 506 electrode, 2 high carbon electrode and 5 high tungsten electrode were used for surfacing test. The wear resistance and impact resistance of the hammer are the best after surfacing with No.5 high tungsten electrode
The wear resistance of the impact hammer overlaid with 506 electrode and No.2 high carbon electrode is two times higher than that of the original high manganese steel. But the cost of these two kinds of surfacing is high, which is not economical When the impact plate is worn 3-5mm, the 5 high tungsten electrode is used for surfacing for 2-3 times When the impact angle of impact crusher is increased from 1500 to 3000, the impact strength can be increased to ensure the particle size after crushing The use methods of impact hammer include grouping according to weight tolerance, alternate row replacement, cross dislocation replacement and symmetrical replacement The gap between the rotor and the front part of the shell of the impact crusher is increased from 10 mm to 85 mm, which can prevent the front part of the body from blocking(2) grinding machine: Generally speaking, the material processed by the grinding machine is fine, and the proct size is fine, up to 0.074 mm, even finer. Its structural feature is that the crushing parts (or medium) contact each other, and the medium used is steel ball, steel bar, gravel or ore block. But some machines have the function of crushing and grinding at the same time, such as autogenous mill. According to the crushing mode and mechanical structure characteristics (working principle), the crushers can be divided into six categories:
(1) jaw crusher (tiger mouth): the crushing action is to press the movable jaw plate to the fixed jaw plate periodically to crush the ore block in it
(2) cone crusher: the ore block is between the inner and outer cones, the outer cone is fixed, and the inner cone swings eccentrically to crush or break the ore block< (3) impact crusher: it uses the high speed impact of the plate hammer and the rebound effect of the impact plate to make the material receive repeated impact and crush. The plate hammer is fixed on the high-speed rotating rotor, and several impact plates are arranged at different angles along the crushing chamber
(4) roller crusher: in the gap between two opposite rotating round rollers, the ore block is mainly crushed continuously, but it also has the function of grinding and stripping, and the toothed roller surface also has the function of splitting
(5) impact crusher: the ore block is broken by the impact of fast rotating moving parts. Belong to this category can be divided into: hammer crusher; Cage crusher; Impact crusher
(6) grinding machine: the ore is crushed by the impact and grinding of grinding medium (steel ball, steel bar, gravel or ore block) in the rotating cylinder
(7) other types of crushing mills: A. roller mills: grind materials by rotating rollers. B. Disc mill: the disc rotation of vertical axis or horizontal axis is used as crushing part. C. Centrifugal mill. High speed rotating parts and medium are used to proce centrifugal force to complete crushing. D. Vibration mill. High frequency vibration is proced by the rotating shaft, which makes the medium and material collide with each other to complete the crushing effect
in order to check and understand whether the technical operation of each proction link meets the process requirements; In order to provide the managers and technicians of the concentrator with the weak links in proction, find and solve the problems in time, and promote the normal proction, the technical detection plays an indispensable and decisive role. It is an important means to do well in proction technology management, metal balance and management level. Therefore, each concentrator must carry out a series of proction technology testing work, and set up corresponding organizations according to the specific situation, such as quality management materials, technical inspection department, technical supervision station, testing group, etc From: Henan Zhenping Xinlong Machinery Manufacturing Co., Ltd.)
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the crusher is used in the coarse crushing stage. Generally, the feed particle size is larger, and the proct particle size is also larger, usually more than 6 mm (- 6 mm accounts for less than 60%). Their basic feature is that the working parts do not contact each other and keep a certain gap. According to the crushing mode and principle, it can be roughly divided into the following four types:
(1) jaw crusher (also known as Laohukou), which is an old and widely used crushing equipment. The crushing action is that the moving jaw periodically approaches and leaves the fixed jaw. Crushing the ore block between the two jaw plates (mainly crushing) and discharging (falling by self weight) is intermittent crushing. According to the movement characteristics of moving jaw, jaw crusher can be divided into simple swing (double toggle plate) and compound swing (single toggle plate)
(2) cone crusher is a continuous crushing equipment. According to the feed and proct size, cone crusher is divided into circular cone crusher and medium and fine cone crusher. According to the length of the parallel belt B (the gap between the moving cone and the fixed cone) of the crushing chamber, it can be divided into standard type, intermediate type and short head type cone crushers
both rotary cone crusher and jaw crusher belong to coarse crushing equipment, but because the cone crusher works continuously, its proction capacity is much larger than jaw crusher when the feeding properties are the same. The standard type and the short head type are used for medium crushing and fine crushing equipment respectively, while the intermediate type is between the two. Generally, it is used as the second crushing equipment when two-stage crushing
(3) impact crusher, which uses the "free" crushing principle of impact force to crush ore, the ore is crushed in the crusher by the impact of impact plate (plate hammer) and impact plate, and the complex effect of multiple collisions between ore. Therefore, the crusher has the advantages of large crushing ratio, high efficiency and less over crushing. It is a promising crushing equipment
(4) roller crusher. The ore is fed into two opposite rotating round rollers (smooth or non smooth) from the upper part. It is drawn into the crushing chamber by the friction between the material and the roller surface and crushed by the roller. The crushed ore is discharged from the gap between the two rollers by gravity. It is mainly used for medium and fine crushing of medium hard and brittle materials.
crusher refers to the crushing machinery whose particle size is more than 3mm and accounts for more than 50% of the total discharge. Crushing operation is usually divided into coarse crushing, medium crushing and fine crushing according to the size of feeding and discharging. According to the action of crushing force, crushers can be roughly divided into two categories: (1) crushers 2) Grinding machine. The crusher generally deals with large pieces of material, and the particle size of the proct is coarse, usually larger than 8 mm. Its structural feature is that there is a certain gap between the broken parts and they do not contact each other. Crusher can be divided into coarse crusher, medium crusher and fine crusher. Generally speaking, the material processed by the mill is fine, and the particle size of the proct is fine, up to 0. 074 mm, even thinner. Its structural feature is that the crushing parts (or medium) contact each other, and the medium used is steel ball, steel bar, gravel or ore block. But some machines have the function of crushing and grinding at the same time, such as autogenous mill. ∮5 five × 1 The upper limit of particle size of ore processed by 8m autogenous mill can reach 350-400mm, and the fineness of proct can reach - 200 mesh, accounting for about 40%
it can be divided into six categories according to crushing mode and mechanical structural characteristics (action principle)
(1) jaw crusher. The crushing action is that the movable jaw plate periodically presses the fixed jaw plate to crush the ore block sandwiched in it< (2) cone crusher. The ore block is between the inner and outer cones, the outer cone is fixed, and the inner cone swings eccentrically to crush or break the ore block
(3) roller crusher. In the gap between two opposite rotating round rollers, the ore block is mainly crushed continuously, but it also has the function of grinding and stripping, and the toothed roller surface also has the function of splitting< (4) vertical crusher. The ore block is broken by the impact of fast rotating moving parts. Belong to this category can be divided into: sand machine, hammer crusher; Cage crusher; Impact crusher
(5) grinding machine. The ore is crushed by the impact and grinding of grinding medium (steel ball, steel bar, gravel or ore block) in the rotating cylinder
(6) other types of crushers and grinders
a roller mill: the materials are crushed by rotating rollers< B. disc mill: the disc rotation of vertical axis or horizontal axis is used as crushing part
C. centrifugal mill. High speed rotating parts and medium are used to proce centrifugal force to complete crushing
D. vibration mill. High frequency vibration is proced by the rotating shaft, which makes the medium and material collide with each other to complete the crushing effect
all kinds of crushers have different specifications and different application ranges. At present, jaw crusher or rotary cone crusher are mostly used for coarse crushing in concentrator; The standard cone crusher is used for intermediate crushing; Short head cone crusher is used for fine crushing. Rod mill for rough grinding and ball mill for fine grinding
data source: Red Star Machinery and equipment knowledge
it can be divided into six categories according to crushing mode and mechanical structural characteristics (action principle)< (1) jaw crusher (tiger mouth). The crushing action is that the movable jaw plate periodically presses the fixed jaw plate to crush the ore block sandwiched in it< (2) cone crusher. The ore block is between the inner and outer cones, the outer cone is fixed, and the inner cone swings eccentrically to crush or break the ore block< (3) roller crusher. In the gap between two opposite rotating round rollers, the ore block is mainly crushed continuously, but it also has the function of grinding and stripping, and the toothed roller surface also has the function of splitting< (4) impact crusher. The ore block is broken by the impact of fast rotating moving parts. Belong to this category can be divided into: hammer crusher; Cage crusher; Impact crusher< (5) grinding machine. The ore is crushed by the impact and grinding of grinding medium (steel ball, steel bar, gravel or ore block) in the rotating cylinder< (6) other types of crushing mills
a roller mill: the materials are crushed by rotating rollers< B. disc mill: the disc rotation of vertical axis or horizontal axis is used as crushing part
C. centrifugal mill. High speed rotating parts and medium are used to proce centrifugal force to complete crushing
D. vibration mill. High frequency vibration is proced by the rotating shaft, which makes the medium and material collide with each other to complete the crushing effect
all kinds of crushers have different specifications and different application ranges. At present, jaw crusher or rotary cone crusher are mostly used for coarse crushing in concentrator; The standard cone crusher is used for intermediate crushing; Short head cone crusher is used for fine crushing. Rod mill for rough grinding and ball mill for fine grinding.
1. According to the way of crushing force, crushers can be roughly divided into two categories:
(1) crushers (2) grinders
crushers generally deal with larger materials, and the particle size of procts is larger than 8 mm. Its structural feature is that there is a certain gap between the broken parts and they do not contact each other. Crusher can be divided into coarse crusher, medium crusher and fine crusher. Generally speaking, the material processed by the mill is fine, and the particle size of the proct is fine, up to 0. 074 mm, even thinner. Its structural feature is that the crushing parts (or medium) contact each other, and the medium used is steel ball, steel bar, gravel or ore block. But some machines have the function of crushing and grinding at the same time, such as autogenous mill. ∮5 five × 1 The upper limit of particle size of ore processed by 8m autogenous mill can reach 350-400mm
2. According to crushing mode and mechanical structure characteristics (action principle), it can be divided into six categories generally
(1) jaw crusher (tiger mouth). The crushing action is that the movable jaw plate periodically presses the fixed jaw plate to crush the ore block in it
(2) cone crusher. The ore block is between the inner and outer cones, the outer cone is fixed, and the inner cone swings eccentrically to crush or break the ore block in it
(3) roller crusher. In the gap between two opposite rotating round rollers, the ore block is mainly subjected to continuous crushing, but it also has the function of grinding and stripping, and the toothed roller surface also has the function of splitting and crushing
(4) impact crusher. The ore block is broken by the impact of fast rotating moving parts. Belong to this category can be divided into: hammer crusher; Cage crusher; Impact crusher
(5) grinding machine. The ore is crushed by the impact and grinding of grinding medium (steel ball, steel bar, gravel or ore block) in the rotating cylinder
A. roller mill: grinding materials by rotating rollers< B. disc mill: the disc rotation of vertical axis or horizontal axis is used as crushing part
C. centrifugal mill. High speed rotating parts and medium are used to proce centrifugal force to complete crushing
D. vibration mill. High frequency vibration is proced by the rotating shaft, which makes the medium and material collide with each other to complete the crushing effect
all kinds of crushers have different specifications and different application ranges. Jaw crusher or rotary cone crusher are usually used for coarse crushing; The standard cone crusher is used for intermediate crushing; Short head cone crusher is used for fine crushing