How do Vibrating Screens work?

 

 

Vibrating screens have been widely used in mining, metallurgy, coal, water conservancy, transport, and chemical industries to complete numerous processes, such as screening, grading, washing, de-intermediation, and also dehydration of materials. As an intermediate web link between mining as well as smelting, mineral processing effectiveness not just directly impacts mineral processing productivity yet additionally has an extensive effect on the logical use of national sources.

 

The vibrating screen works by utilizing the double-rotation vibration created by the vibrator. The upper turning weight of the vibrator makes the screen surface shake in an airplane, while the reduced turning weight makes the screen surface shake the cone surface. Its combined impact The impact is that the screen surface produces double-rotating vibration. Its vibration trajectory is a complicated spatial contour. The curve is predicted as a circle on the horizontal plane and forecasted as an ellipse on the vertical plane. The amplitude can be changed by readjusting the excitation pressure of the top as well as reducing rotating weights. Changing the spatial phase angle of the upper and also reduced weights can change the contour form of the screen surface movement trajectory and change the movement trajectory of the material on the screen surface.

Types of Vibrating Screens

Vibrating screen equipment can be split right into vibrating mining screen, light, great vibrating screen, as well as experimental vibrating screen according to its weight.

Mine vibrating screens can be split into durable screens, self-centering vibrating screens, elliptical exerciser vibrating screens, dewatering screens, circular vibrating screens, banana screens, linear vibrating screens, etc.

Light, great vibrating screen can be divided into rotating vibrating screen, linear screen, straight row screen, ultrasonic vibrating screen, filter screen, and so on

Experimental vibrating screen: waving screen, top-strike vibrating screen, standard examination screen, electric vibrating screen, etc.

According to the material running track of the vibrating screen, it can be separated right into

According to the linear motion trajectory: linear vibrating screen (the material moves on the screen surface in a straight line);

According to the circular motion trajectory: circular vibrating screen (materials move circularly on the screen surface);

According to the reciprocating motion trajectory: great screening machine (materials reciprocate onward on the drying surface).

 

The specific workflow of vibrating screen

 

Recently, although vibrating screening machinery has actually achieved extraordinary development, the theoretical framework of vibrating screens has been secure and becoming mature. Numerous sorts of vibrating screens have actually been presented one after one more. However, vibrating screens with high screening efficiency and also big outcome have actually constantly been vibrating—the new instructions of filter r & d.

 

The coal or ore extracted in the mining field, or the smashed material, before the material is used or better refined, it requires to be divided right into several grades of similar bit size or be dried out, de-intermediated, de-slimed, and also often a combination of a number of items. Yes. When doing the above work, there is always the trouble of grading materials via the holes of the screen surface, and the grading of materials with the holes of the screen surface is called sieving. With the research study on the screening process of materials, it is discovered that the screening of materials can be divided into two phases.

 

1. Fine-grained materials smaller than the mesh size get to the screen surface with the material layer made up of grainy materials.

2. The great bit material passes through the sieve holes on the sieve surface to complete the sieve.

 

When the vibrating screen is functioning, both motors synchronously and reversely revolve to make the exciter produce a reverse excitation pressure, requiring the screen body to drive the screen to relocate longitudinally to make sure that the material is on it is periodically thrown onward for a range because of the excitation pressure. So regarding finishing the material screening operation. It is appropriate for screening sand as well as gravel materials in quarries and can likewise be used for product classification in coal preparation, mineral processing, developing materials, electrical power as well as chemical industries.

 

The functioning part of the vibrating screen is dealt with, and also the material is evaluated by sliding along the working surface. Repaired grid filter is among the most extensively used in concentrators, generally used for pre-screening before rugged squashing or medium squashing. It has a basic structure as well as is convenient to make. It does not take in power and also can directly dump the ore onto the screen surface. The primary drawbacks are low performance as well as low screening efficiency, usually just 50-60%. The working surface of the vibrating screen is composed of flat prepared rolling shafts. There are plates on the shafts, and fine-grained materials pass through the spaces between the rollers or plates.

 

In order to smoothly complete the screening process of the material, the problem of relative movement between the material and the screen surface needs to be pleased. For that reason, the screen box of the vibrating screen must have suitable movement characteristics. On the one hand, it can make the material on the screen surface become loose.

 

On the other hand, it can make the crude particles obstructed on the sieve holes leave and also maintain the fine-grained materials efficiently with the filter. In the real manufacturing process, the actual screening process is: "After a lot of busted materials with different fragment sizes and mixed crude as well as fine bits get in the screen surface, only a part of the material calls the screen surface. In this part of the material getting in touch with the screen surfa., It is not entirely a great particle material smaller sized than the mesh size,.

The majority of the continuing to be great bits smaller sized than the mesh size are distributed throughout the entire material layer.

 

Via the movement of the screen box, the material layer on the screen surface is loosened, to ensure that the void that exists between the huge particles is further expanded, and the small particles seize the day to go through the gap and also transfer to the reduced layer; at the same time, because of the little particles between the materials The void is small, as well as large bits can not travel through. Therefore, the position of huge particles enhances constantly thro that the movement. Because of this, the initial untidy material bit team separates, that is, it is split according to the fragment size, forming an arrangement rule with little bits under and coarse fragments on the top.

 

The fine bit material that gets to the screen surface, because its size is smaller sized than the screen opening size, can efficiently pass through the screen, and lastly recognize the separation of coarse and also great particle materials as well as finish the screening process." Nonetheless, sufficient separation is impossible. In time-sharing, there is typically a part of the great bits continuing to be in the crude fragments on the filter and also can not permeate the sieve. Research shows that although the size of the fine fragments is smaller than the sieve hole, the problem of their infiltration is not the exact same. Compared to screen holes, the smaller sized the particle size, the less complicated it is to penetrate the sieve, and the other way around, the more difficult it is.

How to maintain slurry pump？

Like many other machines, slurry pumps require regular maintenance to operate optimally and reliably. Without proper maintenance, the pump may fail catastrophically, resulting in unplanned maintenance, potential injury and facility shutdown. Even if they do not fail, poorly maintained pumps may lose a full 15% efficiency, causing pump owners to pay a price, reduce output and damage their bottom line. Moreover, although the pump owner and operator can perform some maintenance by themselves, in some cases, professional personnel need to be called. Don't wait for problems with your pump: customize this slurry pump maintenance guide to meet your business needs, and then follow it to keep your pump in optimal operation.

 

Daily maintenance

Although this maintenance list may seem long at first glance, its various projects can often be completed quickly and easily. Although they seem insignificant, these daily steps are the key to maintaining pump efficiency.

Checklist.jpg check the oil, but only when the pump is not running.

If the temperature suddenly increases or decreases, check the bearing.

Check the stuffing box and adjust as necessary.

Monitor all instruments and instruments consistently.

Look for leaks. If the drain hole of the pump casing leaks, replace the lining.

Follow up gland service pressure as changes may indicate further problems. Blocked pipes or poorly functioning stuffing boxes may change the gland working pressure.

Check the V-belt drive, especially those installed in recent days. The new V-belt will stretch and needs to be re tensioned as soon as possible.

 

Weekly maintenance

Don't forget weekly maintenance! Although these two tasks will increase your weekly routine maintenance needs, they are essential to track and ensure pump efficiency.

Readjust the impeller as required.

Record the meter reading.

 

Quarterly maintenance

Quarterly tasks involve more practical work and may require the attention of skilled on-the-job mechanics, but they may mean the difference between a well functioning pump and a catastrophic failure.

Empty the used lubricating oil and replace it with a new one.

Check the V-belt for signs of wear and ensure proper tension. Clean the V-belt and pulley groove.

Clean and oil the studs and threads on the motor base and gland.

Check the stuffing box for wear and repack.

Semiannual maintenance

Last but not least, semi annual maintenance tasks are important because they do not check the pump components, but the whole pump.

Check the whole pump thoroughly.

Clean the bearing and bearing housing and refill with new oil.

Check and flush drain and seal water pipes.

Check that the pump and motor are aligned.

Accurate and up-to-date records must be maintained using a consistent method at all maintenance stages. If more than one employee in your factory records instrument and meter readings, make sure they follow the same procedure every time, so that they can read and compare the records. Of course, if you find any change in the sound of the pump, please check the pump as soon as possible. By performing these tasks several additional times a day, week, and year, you can keep your pump running at its best - rather than dealing with poorly maintained pumps that cause problems or stop completely.

 

Slurry Pump vs Mud Pump: Why Do I Need A Slurry Pump?

The concept of slurry pump and mud pump is very close, and many people don't know it very well. Although the slurry pump and mud pump are impurity pumps, if you have a full understanding of these two pumps, you can clearly distinguish them from the characteristics of application and transmission medium. What is the difference between slurry pump and mud pump? Four aspects to distinguish slurry pump and mud pump.

 

Applications

Slurry pumps are mainly used in industrials of mining, metallurgy, dredge, power, coal and other solid slurry transport. Mud pumps are mainly used for drilling, pharmaceutical, brewing, paper, and other industries, which used to transport suspension.

 

Working principle of pump

The mud pump is a motor that drives the piston through the connecting rod mechanism. This will lead to the change of the sealing cavity volume of the mud pump. And the change of pressure difference inside and outside the pump. Finally, complete the process of water absorption and drainage. When the slurry pump works, the motor drives the impeller to rotate. That is, the impeller works on the slurry and increases the kinetic energy of the slurry. At the same time, the slurry flows to the edge of the impeller due to inertia and is discharged from the discharge pipe at high speed.

 

Conveying medium

Slurry pump is mainly used in mining industry with strong wear resistance. So it transports slurry containing slag, but it can transport slurry. Mud pumps are usually made of cast iron and have low wear resistance. Therefore, mud pumps are often used to transport mud or mud containing suspended particles. When the slurry pump works, the pump components are vulnerable to impact, wear and corrosion. Therefore, the lining of the slurry pump adopts wear-resistant materials, such as high chromium alloy, rubber, etc. Wear resistant materials can effectively reduce the wear parts of the pump. Therefore, most of the slurry pumps on the market are wear-resistant slurry pumps.

 

auxiliary equipment

The mud pump needs to be equipped with auxiliary equipment, while the slurry pump does not. When the mud pump works, it often needs to be used with the high-pressure water pump. The high-pressure pump sends water greater than the mud pump pressure to the leak proof packing. Then protect the packaging. Otherwise, it is easy to wear the seal. The wear-resistant slurry pump can complete the conveying work independently without other auxiliary equipment.

In short, the slurry pump has stronger wear resistance and stronger ability to transport particles. Generally, the capacity of slurry pump is larger than that of slurry pump, which is mainly used for the washing of coal and metal ore. Mud pump is more suitable for mud with low abrasiveness.

 

Similarities between slurry pump and mud pump

1. Both pumps are centrifugal pumps in working principle. They are machines that increase the energy of solid and liquid mixtures through centrifugal force (rotation of pump impeller). The utility model relates to a device for converting electric energy into medium kinetic energy and potential energy.

2. Both have vertical pumps and horizontal pumps, which can transport mud.

3. The pump and motor are set separately

 

Fengwang has a considerable selection of slurry pumps and also Mud Pump.If you want more professional knowledge, please click here to visit our website.