VSI Crusher Parts

VSI Crusher Parts | Vertical Shaft Impactor

VSI crusher is an advanced and high efficient crusher used for the shaping of metallic, non-metallic ores and building materials. Further, it is very helpful for making all kinds of metallurgical slag. This crushing machine is applicable to the material with hardness less than level 9. Further, it is not appropriate for viscous materials such as stone with too much soil.

This article gives you a complete overview of the VSI crusher. Further, you will learn the complete working of VSI crusher and VSI crusher parts in-details. Let’s get started…

What is VSI Crusher?

The vertical shaft impactor is a type of impact crushers that offers higher reduction ratios at lower energy consumption. You can consider them as a stone pump that operates like a centrifugal pump.

There are plenty of VSIs are available in the market such as Sandvik’s CV series and Barmac B Series. These crushing machines use the rock on the rock crushing principle for size reduction. The size reduction results in cost reduction.

The main objective of this machine is to provide high-quality sand aggregate for high-speed railways, municipal buildings, high-rise buildings, and hydropower dam construction. VSI crushers are designed for tertiary crushing.

Different VSI Crusher Parts and Working

Here are some important VSI crusher parts with the functionality:

  1. Feed Hopper:It is a part where the feed materials fall in the vertical crusher impactor crusher. Plus, it is basically a rock-lined hexagonal feed hopper.
  2. Rotor Throttle Gate:It is a hydraulically operated gate that controls the feed rate of rotor material.
  • Hurricane Rotor:The feed material falls into the feed tube by gravity that subsequently feeds the hurricane rotor.
  1. Rock-lined Hurricane rotor:The VSI crusher uses this rotor to accelerate the feed material. Basically, the centrifugal force plays a key role to accelerate the material at the speed of 45 to 62 m/s.
  2. Crushing Chamber:This chamber is lined with a solid layer of material that energized rotor material impacts. It is considered high-velocity autogenous impaction that causes cleavage and attrition of the feed material.
  3. Enclosed Metal Rotor Shoe:It is a top plate that enclosed the top of the rotor and prevents material from escaping from the rotor’s top. It is very helpful in the case of an overfed open-top rotor.
  • Tubular Metal Rotor Shoe:The tubular rotor increases the tip-speed that increases the first feed particle with tighter particle size distribution. In addition to this, it reduces recirculation loads.
  • Open Top metal Rotor Shoe:It is very good for a large feed. Plus, it is an incredible rotor for medium to very hard material. However, the open-top metal rotor works best for softer materials. This rotor can deal with abrasive, dry, or wet materials but it doesn’t work well with the sticky materials. In this rotor, high reduction ratios are common that are very helpful for gravel and sand production in the closed system.
  1. Crushing Chamber:As the name suggests, this is a crushing chamber that crushes everything it receives. Then, this crushing action conveys extremely high energy to the material for crushing purposes. And, this energy is very effective for the majority of the objects. As a result, you will receive a very consistent and uniform grade of material.
  2. Discharge Chute:After producing the high-quality sand aggregate, discharge chute receives it.

VSI crushers have the ability to handle hard, fine, sticky, abrasive, and moist feed materials. These characteristics make it one of the suitable crushers for different applications like quarries and gravel plants. Many firms use it for recycling such as processing glass bottles and cement works.

Feeding Methods of VSI Crushers

Below are the two most popular feeding methods for VSI crushing machines:

  1. Center Feed

The majority of the VSIs receive the feeding material from above into the center of the rotor. After feeding it through the center of the rotor, the material is reached to the crushing chamber. Then, the crushing chamber impacts the outer anvil ring. This crushing action generates extremely high energy to break the material for crushing purposes. And, this energy is very effective for breaking the majority of the objects. As a result, you will receive a very consistent and uniform grade of material.

  1. Cascade Feeding

In this method, feeding material enters the crushing chamber from above directly by bypassing the rotor. This method is called cascade feeding because the material fills up a large feed bowl. Then, it spills over the side and falls into the crushing chamber from above without involving the rotor. The effect of increasing feed through cascade has a striking resemblance to slowing the rotor. Furthermore, cascade feeding might not affect the particle size distribution of quality if its amount is up to 10%.

Main Applications of VSI

Its major limestone applications include gravel, sand, road base, and cement. Besides, its industrial uses include Ferrosilicon, glass, cordite, corundum, silicon carbide, zeolite, and tungsten. The mining applications for VSI crushers are burnt magnesite, non-ferrous metal ore, trona sulfate, perlite, bauxite, iron ore. These crushing machines are very helpful for everything range from waste to abrasive materials and recycling applications.

VSI Crushing Method

VSI crushers are famous for making coarse, sand, and medium aggregates for asphalt/ concrete production. The feed size varies depends on the machines that range from 5 to 12 inches. Therefore, the suitable sized material is provided into the center of an open or closed rotor. It can be either center or cascade feeding.

Then, the rotor starts rotating at very high rpm and throw the feed with high energy into the crushing chamber. When the thrown material hits the anvil ring assembly, it shatters. After this, the cubical shaped products fall through the opening between the anvil, rotor, and to the conveyor below.

The speed of the rotor decides the size of the final particle. If you speed up the rotor, it will produce more fines. Similarly, if you slow down the rotor, it will produce fewer fines. You can adjust the speed of the rotor based on the feeding material.

jaw crusher parts

What Is A Jaw Crusher | Jaw Crusher Parts

Jaw Crusher is a machine that is mostly used in the primary and secondary process of crushing. The main objective of this machine is to crush the large blocks of hard and abrasive materials.

This article explains the complete working principle of jaw crushers. Besides, we will also explain the complete main components of the jaw crusher. What are the main parts and parameters of the jaw crusher? So let’s get started…

How Does Jaw Crusher Work?

The working mechanism of the jaw crusher is very simple and straightforward. A jaw crusher comes with two powerful jaws in which one is fixed and the other one can move. Its working principle is based on the reciprocating movement of the movable jaw. The moveable jaw compresses and crushes everything including ore or rock between itself and the fixed jaw.

The movement of the movable jaw is back and forward against the fixed jaw and break the material between the two jaws into smaller pieces. The crushed material is released from the crusher at the bottom when the moving jaw moves back from the fixed jaw.

What Are The Main Parts of Jaw Crushers?

Jaws play a key role in a jaw crusher. However, the real heart of the jaw crusher and its components are the pitman, the toggle plates, and flywheel. These are the main parts that provide a sufficient amount of energy to break the rocks. Let’s take a brief overview that how these parts work together and make a crushing cycle:

Top 10 Jaw Crusher Parts

Below are the 10 most incredible parts of jaw crushers:

  1. Drive Flywheel

The flywheel is the heart of the jaw crusher. The main objective of the flywheel is to generate a sufficient amount of energy in the form of motion. An electric motor provides enough momentum to the flywheel. Then, it initiates the crushing cycle. One the process is started, the motor will have to provide the energy only necessary to propel the flywheel.

  1. Cheek Plate

These plates are made of high manganese steel casting. In addition to this, some other materials are also used in its construction such as advanced composite material. And, super high and ultra-strong manganese. You can easily replace these places if necessary. There are two types of cheek plates: upper cheek plate and lower cheek plate.

  1. V-belts

These are one of the most common types of drive belts used for power transmission. The primary function of V-belts is to transmit power from the primary unit such as a motor to the shaft.

  1. Drive Motor

It is another most important part of a jaw crusher. This electric motor drives a reducer sheave. The one side of the reducer sheave is an eccentric shaft and the other end of the shaft is a flywheel.

  1. Motor Stand

As the name suggests, the motor stand gives support to the drive motor. So it is a stand where an electric motor sits for proper functioning.

  1. Eccentric Shaft

The eccentric shaft which is commonly known as pitman generates the crushing action. It is a shaft with a portion of its length offset from the rest of the shaft. The portion travels in a greater arc when the shaft revolves. The manufacturers generate motion by attaching a bearing system i.e. pitman bearing and cup. So the generating motion direction is usually up and down.

  1. Toggle Plate

Depending on the type of jaw crusher, the toggle plates play an important role in the crushing process. The toggle plates are comprised of two steel plates and the manufacturers combine these plates with the help of bolts. These bolts are commonly known as Shear Bolts because these bolts are famous for shear strength. If crusher can’t crush something accidentally gets into the crushing chamber. Then, these bolts shear off when the jaw hits the unbreakable material. Therefore, it will prevent damaging the crusher.

  1. Swing Jaw

All jaw crusher comes with two jaws. One of them is moving or swing jaw. This jaw moves back and forward against the fixed jaw to break everything between them into smaller pieces. You can consider it as a lower jaw in humans.

  1. Fixed Jaw

As the name suggests, the fixed jaw can’t move. The moving jaw only moves back and forth to crush different things. You can consider it a supporting jaw that has a striking resemblance to the upper jaw in humans.

  1. Discharge

This is a part that collects the crushing piece of an object. When the swing jaw moves back, the crushed objects are dropped in this part.

Different Jaw Crusher Parameters

Here are some important parameters of jaw crusher given below:

  • Gap Width
  • The maximum feed size is between 80% and 90% of the inlet width.
  • Crushing area length is almost double from the gap width.
  • Crushing area width varies from 1.3 to 3 times based on the gap width.
  • L-Max is a far side jaw opening.
  • L-Min is near side jaw opening.
  • Stroke is the minimum and maximum movability of the lower end of the jaw.
  • The size Reduction ratio is a gap width to the near side jaw opening. It can vary between 1/3 and 1/9. However, primary crushers have a 1/3 size reduction ratio and the size reduction ratio in secondary crushers is ¼ usually.

Nip Angle

The angle between the two jaws is one of the most incredible parameters. This parameter is most commonly known as the nip angle. This is the angle that decides the size of the material passes through the crusher inlet to be crushed. Therefore, this angle is very important that helps the crusher to grip the object without slipping. So this angle depends on the size, frangibility, and the hardness of the material. You can’t select the object that is too small or too large. The nip angle in secondary crushers is greater than the angel in primary crushers. Generally, the value of the angle range from 18 to 24 degrees in primary and 22 to 28 degrees in secondary crushers. The maximum value of nip can be 33 degrees.

Improvement of φ5.5 m×1.8 m semi-autogenous mill liners

One of our copper mine customer, who has 2 sets of φ5.5 m×1.8 m MZS series semi-autogenous mills and 2 sets of MQS series autogenous mills. The annual treatment capacity is 1 million tons. With the continuous increase in production tasks, the annual treatment capacity increased to 1.7 million tons. The heavy workload leads to serious wear of manganese mill liners of the semi-autogenous mill, and the service life is only 5-6 months. Each semi-autogenous mill needs to replace 2.5 sets of liners every year, and the continuous shutdown and maintenance seriously affect the grinding production.

 

Wear status of mill liners

The design thickness of the lifting liner is 70 mm and the height of the lifting strip is 150 mm, as shown in Figure 1 (a). The appearance of the worn lifting liner is shown in Fig. 1 (b). The thickness of the middle part of the lining plate is only 8-10 mm. The middle part of some lining plates has been worn through, while the height of the lifting strip is only 50 mm.

Fig. 1  semi-autogenous mill liners- lifting liner

Fig. 1 lifting liner

Reasons Analysis

The semi-autogenous mill is mainly used for rough grinding. Due to the large ore entering the cylinder, the grinding body is a ball with a diameter of 200 mm (single weight of 50 kg). When the mill is working, the local impact force of the grinding body on the cylinder liner is large. The grinding medium and ore body are lifted by the liner plate to a certain height and then dropped or dropped along the parabola. In the process of throwing, the lining plate is impacted and worn, and part of it is damaged When the ball is lifted up and hit the ore body, the sharp angle of the hard block ore body is chiseled into the surface of the lining plate, and along with the rotation of the mill barrel, it cuts along the surface to form a chisel pit and plow ditch; while the finer ore body is in a state of falling in the middle of the cylinder rotary section, sliding relative to the lining plate, resulting in low-stress abrasion.

The results of the metallographic analysis of the worn mill liner material are as follows:

  • The chemical constituents are C 0.89%, s 0.01%, Si 0.46%, Mn 11.18%, P 0.077%. The carbon content is lower than 0.9% ~ 1.4% of the national standard GB / T 5680-1998, so the wear resistance of the liner is low.
  • Mechanical properties: tensile strength RM = 654.5 MPa, elongation after fracture a = 11%, hardness 195 HBW, impact toughness AK = 148 J / cm2, which are lower than RM ≥ 685 MPa and a ≥ 25% specified in GB / T 5680-2010.
  • The metallographic structure can be seen from the metallographic diagram (see Fig. 2) that the austenite grain size is finer, the inclusions are less (grade 2b), and there is obvious carbide precipitation structure (grade x5) at the austenite grain boundary, which is lower than the national standard GB / T 13925-2010 that “the precipitated carbide level is not greater than X3 is qualified”, which leads to the reduction of the toughness of the mill liner.
Fig. 2 micrograph

Fig. 2 micrograph

 

Solutions

Change semi-autogenous mill liners material

The mill liners material ZGMn13 was changed to zgmn13cr2 (adding 0.003% – 0.005% boron). The as-cast grain shape of the high manganese steel is regular, and the grain size is uniform and fine, which can prevent the micro crack propagation and force the crack to change direction. Tensile strength RM = 765 MPa, impact toughness AK = 165 J / cm2, hardness 243 HBW, yield strength, fracture toughness, wear-resistance and impact resistance are good.

Change semi-autogenous mill liners heat treatment

The results show that the black carbides precipitate obviously at the austenite grain boundary, and the carbon content is low, which indicates that the temperature of the liner is not heated to 1050 during water toughening treatment, In addition, the cooling rate of water toughening medium is slow, and the temperature of water toughening medium is too high, resulting in carbide precipitation at the austenite grain boundary, which affects the wear resistance and toughness of lining plate.

When zgmn13cr2 material is used to make lining plate, the temperature before water toughening is heated to 1050 ~ 1100 ℃, which makes the liner austenitizing fully, dissolving carbides into austenite fully, controlling the temperature of water toughening medium below 30 ℃, accelerating the cooling rate of water toughening, and making the carbide precipitate in austenite too late.

Add semi-autogenous mill liners thickness

If the thickness of all liners is increased by 20 mm, the total weight of a set of liners is 48 T, but it is only increased by about 6 t, which is not enough to affect the load capacity of the semi-autogenous mill, and the cost is only increased by about 50000 yuan.

The distribution of shell liner and lifting liner is shown in Fig. 3.

The distribution of shell liner and lifting liner

The distribution of shell liner and lifting liner

 

The Results

After the transformation, the lining plate was put into use in the second half of 2009. Compared with the lining plate before the transformation, it has the following advantages:

(1) It reduces the maintenance, replacement times, and downtime of the liner, improves the work efficiency and increases the output.

(2) The service life of the liner is extended to 8 months, and the service life is increased by nearly 30%.

(3) The wear resistance and impact resistance of the liner is greatly improved by using zgmn13cr2 steel. After 8 months of service, the liner was shut down for inspection. The thickness of the middle part of the liner and the lifting liner was about 10-18 mm, and the thickness of the liner at the inlet and outlet was about 32-40 mm, indicating that the wear resistance of the liner was significantly improved.

Sandvik H6800 Dust Seal Figure 1

Sandvik H6800 Dust Seal Improvement

One of our customer import two sets of  Sandvik H6800 cone crushers in the 2015 year. After using the new cone crusher, the crushing efficiency has been greatly improved and the production capacity has been further improved. However, there are still some problems need to solve. Such as the dust seal problem: After several years of use, it was found that the dust seal of the H6800 single-cylinder hydraulic cone crusher wears faster and consumes more. Each crusher needs to replace about 4 dust seals per year, worth about 140,000 yuan, and the equipment has high operating costs.

Cause Analysis

The dust seal is supported under the moving cone, and the dust cover can move and slide freely, as shown in Figure 1.

Sandvik H6800 Dust Seal Figure 1

  • 1.Dust seal     2.Gear ring     3.Support ring    4.Rubber scraper     5.Dust cover

Due to the relative movement between the dust seal and the dust cover, the wear is faster. After about 3 to 4 months, the gap between the dust seal and the dust cover exceeds the allowable clearance and must be replaced.

Improvement

Aiming at the problem of large wear of the dust seal, a comprehensive analysis was carried out, and corresponding transformation and utilization were carried out.

  • To measure the dust seal that needs to be replaced with excessive wear, find a groove with a width of 8 mm and a depth of 7.8 mm on the inner working surface, see Figure 2.
  • Insert a rubber ring of φ 8.5 mm in this groove, and press and connect the joint.
  • After inserting the rubber ring, clean the burrs of the groove and press the rubber ring. Be careful not to let the rubber ring undulate when lifting.

Sandvik H6800 Dust Seal Figure 2

Notices

  • Always check for leaks during operation and replace the rubber ring regularly. The rubber ring is usually replaced periodically when the moving cone liner is replaced.
  • Pay attention to the wear of the dust ring. If the wear is large, replace the dust seal. Replace approximately one dust seal per year.

The Result

The modification of the dust seal of the Sandvik H6800 crusher can effectively prevent dust and dirt from entering the broken lubrication system, which can meet the requirements of equipment operation, and only use one dust seal per year, which can save 105,000 yuan than before the transformation.

 

 

 

Nordberg GP300 Top Bearing Seal Structure

Nordberg GP300 Top Bearing Seal Structure Improvement

One of our customers started to use Nordberg GP300 cone crusher since the 2004 year. The machine has the characteristics of large processing capacity, simple operation, convenient maintenance, and high automation. However, after several years of use, some problems have arisen, requiring frequent maintenance and replacement of parts, which not only wastes a lot of labor and material resources, but also requires the entire production system to be shut down, which affects normal production.

The Problems

The feed plate of the GP300 cone crusher and the upper frame are fixed by four M20 screws with O-rings for sealing the end faces between the end faces. Check the following picture:

Nordberg GP300 Top Bearing Seal Structure

  • 1. Feed Plate       2.4- M20 Screws       3.O-rings      4.The Upper Frame       5. The Upper Bushing    6.Mainshaft

The fixing of the upper frame and the distribution plate of the GP300 cone crusher is unreasonable. Under the vibration of the ore impact and the crushed ore of the equipment, the bolts are subjected to large force, which is easy to loose or even sheared, resulting in the separation of the ore. The disc and the rack are loose and create a gap. The O-ring seal loses its sealing effect, and mud, slurry and dust enter the upper cavity through the gap (the grease is stored in the cavity), causing rapid wear of the upper shaft (with the jacket) and the upper bearing. The separation disc is located in the feeding chamber of the crusher. It is difficult to find that the distribution disc is loose when the equipment is running, so it cannot be processed in time.
When the wear reaches the limit, the equipment vibrates greatly, the upper part of the main shaft is not effectively supported, and the crushing capacity is greatly reduced. The equipment has to be shut down for repair; when the wear exceeds the limit, the large axial force generated by the crushing causes the main shaft to tilt too much, crushing the eccentricity The upper part of the copper sleeve causes the copper sleeve of the frame to rupture. In recent years, an average of one upper bearing needs to be replaced every month. Every two months, the upper bearing housing and the parts such as the separation plate need to be replaced. In less than one year, the eccentric copper sleeve and the frame copper sleeve need to be replaced.
After a series of accessories such as the upper bearing are worn, the moving cone is excessively vibrated, causing the matching cone surface of the upper frame and the lower frame to wear.

Improvement Measures

The mine has improved the bearing seal structure of the cone crusher, as shown in Figure 2. Machining 1 piece of M440×8 mm×55 mm left-hand locking sleeve and welding on the upper frame. The left-hand locking sleeve and the moving cone rotate in opposite directions. Only the locking will not loosen during operation. A sealing groove is formed on the upper surface of the locking sleeve, and the oil hole is opened on the side for lubrication. Install a lock nut on the lock sleeve and tighten to fix the splitter disc. Even if the splitter disc is loose, the slurry will not enter the grease chamber at the top of the spindle.

Figure 2

  • 1. Feed Plate       2.4- M20 Screws       3.O-rings      4.The Upper Frame       5. The Upper Bushing    6.Mainshaft

After the improvement, the vibration of the equipment is reduced, the wear caused by the vibration of the upper and lower frames is reduced, and the local axial pressure of the moving cone to the eccentric copper sleeve and the copper sleeve of the frame is also reduced, and the crusher is operated more. It is stable and avoids cracking of the eccentric copper sleeve and the frame copper sleeve.

The Result

The mine improved the top bearing seal structure of the GP300 cone crusher in November 2009. The equipment has been operating normally, and the parts have not been replaced, saving a lot of maintenance time and achieving good economic benefits. 1 year can save 10 pieces of upper bearing, totaling 50,000 yuan; 4 bearing blocks, totaling 20,000 yuan; 3 pieces of main shaft sheath, totaling 15,000 yuan; 4 pieces of mining plate, totaling 20,000 yuan; eccentric copper sleeve 1 A total of 90,000 yuan; a rack of copper sleeves, a total of 110,000 yuan. The total cost savings is 315,000 yuan. The improvement of the sealing system is only 28,000 yuan.

 

 

Change Cone Crusher Liner

When And How To Change Cone Crusher Liner?

When Need To Change Cone Crusher Liner?

Cone crusher liner needs to be changed well before they are cracked, broken, loose, or have holes in them! If cone crusher liner pushed too long can and will lead to mechanical many problems with the Crusher:

  • A thinning mantle and thinning bowl liner will flex.
  • Flexing liners will crack out the backing material.
  • Continued flexing will “powder out” the backing material.
  • The flexing deteriorates the head and bowl seating surfaces.
  • The seating surfaces eventually will need reconditioning as liners will no longer stay tight.

In our experience that too many people lean towards too late, the optimum time to change a liner really depends on how much money you are prepared to lose to production losses to get the maximum use out of a wear component.

The first condition that is optimum is that the liner change happens when you planned it. This gives you the opportunity to have all of the required parts on-hand before starting. This also allows you to perform other maintenance work on other equipment when the change is being conducted. These days it’s tough to get screen media and manganese on a moment’s notice and you will need to plan things if you need to rent a crane.

The second condition is changing the liner before you start to suffer significant production losses. On top adjust/screw adjust cones this is especially true as the feed size starts to shrink pretty dramatically as soon as you get to the last 1/3 of life and as you near the end the feed size can get very small, losing as much 30% of feed size. This is less of an issue with hydrocodones as the feed size remains constant throughout the life of the manganese.

You should have a pretty good idea when you will need to change manganese and be able to have all of the parts on hand prior to needing to change. By having an accurate belt scale, you can know to the day when your production starts to tail off to the threshold and schedule the change immediately.

What is the threshold for a liner change? We believe the maximum threshold for a liner change is as follows: Change your liners no later than a 10% decline in production.

Also, there are some other notices:

  • Change the cone crusher liner sat the same time each time by watching the adjustment cap height. Some customers measure the distance between the underside of the adjustment cap and the top of the adjustment ring. This creates a reference point for the next liner change. Such as Nordberg GP series cone crusher, When the dimension is 10mm-15mm, the GP cone crusher liner needs change.
  • Change the cone crusher liner at the same time each time by watching the total number of crushing hours on the liners. Some customers watch and record the total number of crushing hours on a set of liners. Once established, this creates a benchmark for the next set of liners. Such as Nordberg MP series cone crusher, most of the original crusher liners can work around 755 hours.
  • Change the cone crusher liner at the same time each time by watching the total tons of material that passed through the set of liners. Some customers watch and record the total tons of feed material that passed through the liners. Once established, this creates a benchmark for the next set of liners.
  • Change the cone crusher liner at the same time by watching for a reduction in throughput caused by the closing off of the liners feed opening.The volumetric area of the liner decreases late in liner life as the feed opening closes off. This results in lower throughput and a substantial loss in salable product. An excellent time to change liners is when a 10% loss of product is noticed.

How To Change Cone Crusher Liner?

  • On the initial set of new liners, place a mark on the adjustment cap driver ring where the pinion tooth makes contact with a driver ring tooth when the target crusher setting has been achieved.
  • Keep an accurate record of the number of teeth used to compensate for liner wear on this set of liners.
  • After the initial set of liners have worn out, but before moving the bowl, record the total number of teeth the driver ring has moved and also paint a horizontal liner on the side of the dust shell just below the bottom of the adjustment cap. This will be the baseline for determining how close the next liner sets are to being worn out.
  • When a new liner set has been installed, keep a record of the number of teeth the driver ring has moved and compared this number to the total number from the initial set of liners. This will give an estimation of the liner wear. The horizontal mark painted on the dust shell will also be indicated when the liners are approaching the wear limit. The approximate minimum heights of the adjustment cap (A-dimension) with worn liners are listed in the attached tables.

When changing liners and determining liner wear, follow the instructions in the related cone crusher instruction manual.

Extend Crusher Liner Life

Extend Crusher Liner Life Tips

There are some tips to extend crusher liner life:

1. When changing the new crusher liners, you need following these steps

  • Operate 50% rated power (65% amps) with a full cavity for 6 hours.
  • Operate 75% rated power (80% amps) with a full cavity for 2 hours.
  • Operate at or near 100% rated power (100% amps) from this point on.
  • The Crusher normally operates near full power draw
  • Increasing the Crusher setting in order to operate at the lighter power levels does not affect the crushing circuit.

2. Limit the quantity of water used to control dust!

  • Many times water is used above the Crusher to control dust.
  • Too much water can cause fines to be washed down the face of the mantle which can cause premature liner wear.

3. Keep a material load on the Crusher all day!

  • When feed enters the crushing cavity, it rubs against the fast-moving mantle and if done frequently throughout the day (switching from load to no load), it may prevent the liners from work hardening properly.
  • Liners will work harden and get tougher if you can maintain a steady feed rate to the crusher all day long.

4. Change New Material Crusher Liner, Such as the TIC Insert Cone Crusher Parts

When changing to TIC insert cone liner and bowl liner, the span life can be 2-3 times than normal manganese cone liner and bowl liner. Titanium carbide (TiC) cone crusher wear parts are designed to increase the wear life of wear parts in abrasive environments. Titanium carbide columns are cast within proprietary alloys for added strength and durability.

 

Nordberg MP Series Cone Wear Parts Selection Guide

Nordberg MP Series Cone Wear Parts Selection Guide

The Nordberg MP Cone crusher is a compressive crusher in which feed material is crushed between a fixed bowl liner and a moveable mantle. Bigger rock particles are crushed directly between the surfaces of the mantle and bowl liner. This is called single layer crushing. Smaller rock particles are crushed between other rock particles, which is termed multi-layer crushing or inter-particle comminution. Multi-layer crush-ing plays a significant role in the MP cavity. This improves the reduction through the crusher and end product shape.

Each MP Cone Crusher has sever-al cavity options with different feed openings and setting ranges. The correct cavity can be selected based on the feed size, setting, and application. Standard liners are typically used in secondary applications. Secondary applications don’t necessarily need to be operated in the closed circuit, but preferably choke fed. Short head liners are used in tertiary or quaternary stage applications for fine crushing and may be in closed circuit returning to the crusher. Liners are manufactured from XT510,XT515, XT520, XT525, XT710, XT750 or XT770 material depending on the application and material characteristics.

Nordberg MP Series Cavities Selection

Part Number Description Crusher Type Weight
1048315201 BOWL LINER STANDARD MEDIUM MP800 4,132.000
1048315250 BOWL LINER SHORT HEAD – FINE MP800 3,908.000
1048315255 BOWL LINER SHORT HEAD – MEDIUM MP800 4,451.000
1050143900 MANTLE STANDARD MP800 4,347.000
1050143950 MANTLE SHORT HEAD MP800 4,987.000
1050143953 MANTLE SHORT HEAD MEDIUM INTERMEDIATE MP800 4,700.000
10P1018901 BOWL LINER MODIFIED, SH HD MEDIUM MP800 4,414.000
MM0314033 BOWL LINER SHORT HEAD COARSE MP800 3,561.000
1048315559 BOWL LINER STANDARD MP1250 6234
MM0366360 MANTLE STANDARD MP1250 5383