The screening a Static Grizzly separator does is sort and classify the rock according to size. The first stage is SCALPING. This is the practice of removing any material that may slow production. It may be rock that is too big for the equipment to effectively handle, or fine material that is taking up valuable space and will consume precious energy if there is further handling. The name of the equipment that performs this function is called a GRIZZLY. The equipment is limited to a maximum size of rock that it can accept. The grizzly is a pattern of heavy steel bars that are laid down in a grid pattern. This grid will allow the small rocks to go through. The larger rock being bigger than the grid opening wont. This rock then can be either sent for further size reduction, or removed.
The purpose of this is to keep the grizzlies down time to a minimum by preventing the oversized rock from piling up while on its surface. The effectiveness of the sizing will be lowered due to rock that could go through sliding off. But as a counter balance the overall through put will be better due to the greater availability of the grid. If the Grizzlies performance rate is to low, then causing the grizzly to vibrate will increase the effectiveness of the sizing.
The Ross Chain Feeder illustrated in Fig. 3 is shown discharging the ore over a bar screen, or grizzly. It is advisable to provide a screen of this sort ahead of the primary breaker in order to bypass material that is already small enough to pass straight through the machine. The commonest device is a stationary grizzly from 6 to 12 ft. long, slightly wider than the stream of ore, and set at a slope of from 45 to 60 to the horizontal. The bars, which should be of mild steel, are preferably wedge-shaped with the wider part uppermost. They are held together by long bolts at right-angles to their length and are kept at the desired distance apart by spacing washers, which often consist of old piping cut to the required length. The clearance betweenthe bars at the upper end should be the same as the discharge opening of the crusher which the grizzly serves, but at the lower end it should be slightly greater to prevent choking.
A grizzly of this type, though cheap and simple, tends to get clogged with ore. In conjunction with a Ross Chain Feeder, however, clogging is eliminated and the length of the bars can be reduced by 50% or more.
Bars are a widely used means of reducing the work of primary or secondary crushers. As the ore is fed to the crusher, it passes over the grizzly bars, and the finer pieces drop through into the mill ore bin. The grizzly is made of wear resisting wedge shaped bars easily replaced if necessary.
Grizzly Bars are punched and held in place by steel rods passing through the holes. Cast iron spacers, of the proper shape and width, are placed between the bars. Various types of bars and spacers can be supplied, depending upon the application.
A vibrating grizzly screen has been developed as a distinct improvement over the fixed grizzly now in such wide use.It combines the functions of screening and feeding the ore to the primary crusher, and, by eliminating the undersize product in the ore feed to the crusher, materially increases the crusher capacity. In addition, due to the pulsating action of the unit, the ore is fed positively to the crusher, at a controlled rate and the manual labor usually required is eliminated.
The unit consists of a strong, frame mounted, standard grizzly which receives a positive eccentric motion in a lateral plane through connecting links attached to the head motion of the jaw crusher. Due to this positive action the angle of slope of the grizzly may be much less than that required in fixed type grizzlies; and head room or fall may be reduced.The Shaking Grizzly is constructed in several sizes to fit standard Jaw Crushers.
Aggregate production plants use screens to direct, separate, and control material flow in the process. The two main purposes for screening the aggregates are to remove oversize material from the crusher product or undersizematerial from the crushing plant and to completely size the materials produced. An aggregate production plant must perform both functions.
The feed may contain some material that does not have to be crushed and which should be removed from the input to the primary crusher. A scalping unit is frequently used between the feeder and the primary crusher to remove from the feed material that is smaller than the setting of the crusher. It may be a grid, grate, or screen, and it may be stationary or it may vbrate. Raw material removed from the feed is sent to finish screens and reduction crushers.
Xinhai devotes to providing Turn-key Solutions for Mineral Processing Plant (EPC+M+O), namely design and research - complete equipment manufacturing and procurement - commissioning and delivery - mine management - mine operation. The essence of EPC+M+O Service is to ensure sound work in every link. The model is suitable for most of the mines in the world.
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Vibrating screen mesh is mainly used on vibrating screen machines for screening and sizing all kinds of sand, gravel, coal, stone, rock and other materials in mineral, metallurgy, quarry and other industries.
Separate crushed materials and gravel into different sizes through large screens or industrial screens. As part of the crushing operation, coarse screens called grizzly bears or oxen are used to separate too large or too small materials from raw materials.Screens have static, horizontal and cylindrical screens, but today, most factories use inclined vibrating screens. The screening equipment determines the clear and reliable material separation, which provides the basis for the subsequent mineral processing.
Main parts of high frequency vibrating screen are mainframe, screen, electric vibrators, electric motor, rub spring and coupler.The screening decks are capable of single to triple decks, greatly improve the screening efficiency and capacity. Besides, providing a thin and loose bed of particles, which as well as do a good effect on the screen.Sieving is one of the oldest and most widely used physical size separation methods and is widely used in industry. In the continuous screening process, high frequency and low amplitude features lead to the vertical elliptical movement, the particles that fall from the feed hopper and reach the surface of the screen are sorted under the action of gravity. Oversized particles rebound along the screen, and most undersized particles pass through the holes.
High frequency vibrating screen is the most important screening machine mainly used in the beneficiation industry. They are used to separate materials containing solids and crushed ores with a particle size of less than 200 m. Wetting or drying materials can be sieved.Unlike the ordinary vibrating screen, the frequency of high-frequency screening is controlled by an electromagnetic vibrator installed above the surface of the screen and directly connected to the surface of the screen, and the vibration frequency is adjustable.High-frequency vibrating screens are usually operated at an angle of inclination, traditionally varying between 0 and 25 degrees, up to 45 degrees. In addition, it should operate at a low stroke with a frequency range of 1500-7200 RPM. Before using a high-frequency screen, it is usually necessary to pretreat the feed, because the holes in the screen are easily blocked.
The limitation of the high frequency vibrating screen is that the fine screen is very fragile and easily blocked. As time goes by, the separation efficiency will decrease and the screen needs to be replaced.
Circular vibrating screenThe multi-layer vibrating screen is specially designed for screening stones in quarries. It can also be used to classify products in coal preparation, mineral processing, building material production, power and chemical industries.The main advantages of the circular vibrating screen are as follows.(1) By adjusting the excitation force, the flow rate can be changed easily and steadily.(2) The circular vibrating screen has stable vibration, reliable operation and long service life.(3) Simple structure and reliable operation. The relatively light weight and small volume make maintenance easier.(4) The closed structure of the screen effectively prevents dust pollution.(5) Low noise intensity and small power consumption are generated during the operation of the vibrating screen.High frequency vibrating screen(1) Light, durable structure. The compact high-power vibration exciter is used as the drive. No belt or other accessories are required. The screen is very light but durable.(2) Adjustable flow rate. The screening capacity can be adjusted with ease because the stroke can be varied by adjusting the unbalanced weight with the most suited number of poles.(3) Screening capacity can be easily adjusted by adjusting the stroke, frequency, etc.(4) Stable performance. The high power of vibration makes screen run stable, even when screening adhesive materials.(5) Accurate screening. According to the specific materials and flow rate, single-layer to triple-layer deck-type groove can be designed according to the screening requirements to achieve accurate and efficient screening.(6) Simple start, stop. Press the controller button to easily control the start or stop of screening.
In the beneficiation line of various ores, the high-frequency sieve plays a vital role. The high-frequency sieve sifts out the coarse particles and sends them back to the crusher for crushing. At the same time, the fine-grained materials are discharged in time to avoid excessive crushing caused by re-grinding.The sieved materials can enter the next stage of beneficiation process. The use of high-frequency sieve can not only meet the requirements of mineral fineness, but also achieve smaller particle size separation, thereby reducing the capacity and overall energy consumption required in the crushing stage. Therefore, the grade of the final product is improved, and a better recovery rate and screening efficiency are provided.
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Haver & Boecker Niagara is a leading provider in screening, pelletizing and primary crushing systems. The companys mission is to deliver the best of these technologies to customers in the aggregates, mining, minerals, chemical, cement and food industries. With deep roots and years of experience in these industries, Haver & Boecker Niagara uses its innovative and shared technologies to effectively meet the needs of customers around the world.
Haver & Boecker Niagara is a leading provider in screening, pelletizing and primary crushing systems. The companys mission is to deliver the best of these technologies to customers in the mining, aggregates, minerals, cement, building materials, fertilizer and salt. With deep roots and years of experience in these industries, Haver & Boecker Niagara uses its innovative and shared technologies to effectively meet the needs of customers around the world.
In the mineral processing production, many mine owners may have met various problems, like the vibrating screen cannot reach the expected processing capacity, the screening efficiency is too low. As important screening equipment, the screening efficiency of the vibrating screen will directly affect the final product quality and investment cost.
Generally, the screening efficiency of vibrating screen is related to many factors, such as material properties, equipment structure and various performance parameters. In addition to the hard factors of material properties and equipment structure, we mainly start from the performance parameters and analyze the influence of each performance parameters on the screening efficiency of vibrating screen, including amplitude, vibration frequency, vibration direction angle, screen surface inclination angle and projectile angle, so as to provide a reference for vibrating screen operators.
Generally, the larger model the vibrating screen, the larger the selected amplitude. If the amplitude of the vibrating screen is larger, the phenomenon of screen hole blockage will be less, which is more conducive to the screening of ore stratification, and obtain better screening production capacity. However, it should be noted that if the amplitude of the vibrating screen is too large, the strong vibration will cause relatively large damage to the vibrating screen itself. The vibration screen amplitude selection is usually determined by the ore size and properties, when the ore particles are small, wet and also have a certain viscosity, we need to use low frequency, large amplitude.
In addition, the corresponding amplitudes and frequencies should be selected for different screening stages. For example, the screening operations used before the separation generally use low frequency, the large amplitude of vibration, dehydration, the disintermediation operations generally uses high frequency, small amplitude.
The vibration frequency has a direct influence on the pulsation state of ore particles on the screen surface. Taking high frequency vibrating screen as an example, its high frequency can well break the tension of pulp surface, makes fine material oscillate at high speed on the screen surface, accelerates the separation of useful minerals, and increases the probability of contact between material with less than separated particle size and sieve hole, thus creating good screening conditions. Too high or too low vibration frequency is not beneficial to screening efficiency vibrating screen.
According to the study, no matter what screening operation the vibrating screen carries out, the vibration frequency is maintained at 850-1000 times/minute as an ideal choice. If the frequency is too low and the vibration intensity is the same, the weight of the eccentric block of the vibrator will increase accordingly, which is not economical enough. At the same vibration intensity, the higher frequency will greatly affect the running speed of the ore, which means that the processing capacity is reduced. Therefore, the vibration frequency is not adjusted at will, must be adjusted to the appropriate range according to the actual situation of the selection plant to make the vibrating screen play the ideal performance.
Slope angle of screen surface refers to the included angle between screen surface and horizontal plane. The size of its angle is closely related to the processing capacity and screening efficiency of the vibrating screen. When the inclination angle of the screen surface increases, the movement speed of ore particles on the screen surface becomes faster, and the processing capacity increases accordingly. However, the residence time of ore particles on the screen surface is correspondingly shorter at the same time, which affects the screening efficiency of the vibrating screen.
The slope angle of screen surface is determined according to the material application and actual production needs. The horizontal vibrating screen is recommended for fine screening. If the granularity of screening material is large and the screening rate is good, the slope angle can adopt 5-10. If the particles are large and overgrinding, the slope angle can adopt 15. The reasonable range of slope angle is based on the uniform distribution of material particles. Installation inclination of different types of vibrating screen is different, the installation inclination of high frequency vibrating screen is about 30, the inclination of vibrating screen used for the general purpose is 0-15.
The vibration direction angle mentioned here refers to the included angle between the screen motion direction and the screen surface, which is generally denoted by . When determining the vibrating direction angle, the first thing should be considered is the nature of the ore being screened. For the ore with high density or fine particle size, easy to be crushed, the vibrating direction angle of the vibrating screen should be large. For those minerals with large water content, strong viscosity or abrasion resistance, the vibrating direction angle of the vibrating screen should be small.
In actual production, most linear vibrating screen adopt the vibrating direction angle as 30, 45 and 60, which can not only better adapt to various screening performance, but also obtain the best moving speed and screening efficiency. The vibrating direction angle of the circular vibrating screen is 90, so the circular vibrating screen needs to be installed at an angle, otherwise the minerals will not move forward.
According to the screening theory and practice, the size and strength of the projection angle of the vibrating screen have a direct influence on the screening of the ore on the screen surface. When the projection strength of the vibrating screen of ore increases, the inertial force is also larger, the ore can be thrown higher, which is more conducive to the screening. However, too much projection strength will inevitably affect the screen box, making it premature damage. Therefore, the size and strength of the projection angle should consider the structural strength of the screen box.
In the actual use of the process, different types of vibrating screen will certainly have some differences. It is suggested that all mine owners look for equipment manufacturers with the qualification of mineral processing EPC+M+O service to purchase the appropriate vibrating screen, and determine the value of each parameter according to the actual situation of the mineral processing plant, so as to obtain the ideal screening efficiency of the vibrating screen.
Vibratory screeners are becoming more widely used across various industries because they allow for strict size-control and efficient separation in material sorting. General Kinematics DS and VS direct drive screens offer versatility and high-performance screening in a small, value engineered package. Screens are available in a single motor design for elliptical motion or a dual motor design for linear screening and can work with either a horizontal or incline set-up. Each vibration method ensures the particles passing along the screen, if small enough, will have the opportunity to fall through the screen mesh between the start and end of the deck. Each style comes in standard sizes, but can be customized with different deck systems, including wire mesh, steel, rod decks or polyurethane panels.
Screen capacity and longevity can depend on screen use, cleanliness, and the aggregate being screened. General Kinematics vibrating screens solve these concerns with a large variety of sizes, ensuring you find the perfect fit and capacity for your needs. General Kinematics screens are also equipped with simple construction and only essential moving parts, making them a cost-effective, low-maintenance solution.
In the mineral processing area, the trommel screens(aka. Rotary drum screens) and vibrating screens are both widely used screening & classification equipment. But whats the difference between the trommel screens and vibrating screens, and how to choose the most suitable screens for your mineral processing application? Or even how should we choose the right screening equipment for specific mining conditions?
Thorough we all may know that they are both are widely used screening equipment, but the different working methods and principles also mean the difference in output, as well as the types of materials suitable for screening processing.
Vibrating screens are screened using the exciting force generated by a vibrating motor and belong to vibrating screens. Commonly used mine vibrating screens include circular vibrating screens and linear screens.
The trommel screen is another screening form. During the screening process, the equipment will not vibrate, but generally, the motor and reducer drive the drum to rotate through the bearing. The material in the drum passes through the screen from high to low due to the rotation of the drum. And it is successfully screened out, so the trommel screen belongs to a type of rolling screening.
trommel screen: It is a cylinder. The outer surface of the cylinder uses one or more layers, or several sections of screens to increase the screening specifications. The volume of the trommel screen is generally large, mainly including motors, reducers, drum devices, screens, and machines. It is composed of a frame, a sealing cover, and an inlet and an outlet. A steel ring must be added to the drum device to prevent the trommel screen from deforming.
The roller device is installed on the frame obliquely. The motor is connected with the roller device through a coupling through a reducer, and drives the roller device to rotate around its axis. When the material enters the drum device, due to the tilt and rotation of the drum device, the material on the screen surface is turned and rolled. The qualified materials (products under the screen) are discharged through the outlet at the bottom of the rear end of the drum, and the unqualified materials (on the screen) The product is discharged through the discharge port at the end of the drum.
Using the vibration motor as the vibration source, the material is thrown up on the screen while moving forward in a straight line. The material enters the inlet of the screening machine evenly from the feeder, and produces several kinds of screens through the multi-layer screen. The upper and lower objects are discharged from their respective outlets.
The screen surface is fixed on the screen box, and the screen box is suspended or supported by springs. The bearing of the main shaft is installed on the screen box and is driven by the pulley to rotate at high speed. The eccentric counterweight plate is installed on the main shaft and generates centrifugal inertia force with the rotation of the main shaft, so that the screen box forms an approximate circular orbit vibration.
The trommel screen can be divided into single-layer, double-layer and three-layer vibrating screens according to the number of layers of the screen. This vibrating screen is also similar, according to the number of screen surface layers can be divided into single-layer, double-layer, three-layer and four-layer vibrating screen.
The vibrating screen is a screening equipment with a vibrating motor as the vibration source, so the screening accuracy is high. The trommel is a high-output screening equipment, and the screening accuracy is not as high as the vibrating screen.
For the trommel screen, the material is turned over and rolled in the drum, so that the material stuck in the sieve hole can be ejected to prevent the sieve hole from being blocked. For the circular vibrating screen, the material moves in a parabolic circular trajectory on the screen surface, so that the material is dispersed as much as possible to improve the materials bounce force, and the material stuck in the screen hole can also jump out, reducing the hole blocking phenomenon.
Vibrating screen and trommel screen have their own working methods and screening principles. Some raw materials can be screened through them. However, for different sites and different material requirements, suitable screening machines should be selected to achieve better screening results.
According to different structure and use, vibrating screens usually be devided into many types by the vibrating screen manufacturers. Below wil introduce the top 10 vibrating screens, and how to choose the right vibratory screen?
linear vibrating screen is driven by double vibrating motors. When the two vibrating motors are rotating synchronously and reversely, the excitation force generated by the eccentric block offsets each other in the direction parallel to the axis of the motor, and overlaps into a resultant force in the direction perpendicular to the axis of the motor, so the motion track of the linear vibrating screen machine is a straight line.
Working Principle:The two motor axes of the linear vibrating screen have an angle of inclination in the vertical direction relative to the screen panel. Under the combined force of the exciting force and the self gravity of the material, the material is thrown on the screen surface to jump or move forward in a straight line. Through the multi-layer screen panels, a variety of specifications of materials are generated, and discharged from their respective outlets, so as to achieve screening and classification. linear vibrating screen is suitable for screening various dry powder or granular materials with particle size of 0.074-5mm, moisture content <7%, and no viscosity. The feed particle size is not more than 10 mm.
Circular vibrating screen is a new type of vibrating screen with multi-layer screen and high efficiency. According to the type of materials and the requirements of users, the high manganese steel woven screen, punched screen plate and rubber screen plate can be used. The circular vibrating screen is installed in the seat type. The adjustment of the screen surface angle can be realized by changing the position and height of the spring support.
Working Principle: The motion track of the screen box of the circular vibrating screen is circular. The circular vibrating screen uses the inertia exciter to produce vibration. The main shaft fixed on the screen box is driven by the motor to rotate at high speed, and the eccentric body installed on the main shaft rotates with it, generating centrifugal inertia force, so that the screen box that can freely vibrate will produce vibration similar to the circular track.
Circular vibrating screen is widely used in the materials classification of mining, building materials, transportation, energy, chemical industry and other industries because of its long flowing line and many screening specifications.
Elliptical vibrating screen is a vibrating screen with elliptical motion track (Elliptical Shale Shaker), which has the advantages of high efficiency, high screening accuracy and wide range of application. Compared with the ordinary sieve machine of the same specification, it has larger processing capacity and higher screening efficiency.
Triaxial elliptical vibrating screen is widely used for the screening operation of sand and stone materials in sand plant. It is the ideal screening equipment for all kinds of mines, quarries and mobile screening stations.
Working Principle: The power is transmitted from the motor to the main shaft of the exciter and the gear vibrator (speed ratio is 1) through the V-belt, so that the three shafts can rotate at the same speed and generate the exciting force. The exciter is connected with the high-strength bolts of the screen box, resulting in elliptical movement.
Materials on the screens do high-speed elliptical movement along with the screen machine, so as to achieve uickly separate, sift and move forward, and ultimately complete the classification of materials.
The working surface of the roller screen is composed of a series of rolling shafts that arranged horizontally, on which there are many screen plates. When working, the fine material passes through the gap between the roller or screen plate, large blocks of materials are driven by rollers, moving to the ends and discharging from the outlets. Roller screens are mostly used in the traditional coal industry.
Working Principle: For the rolling shafts are arranged according to different working angles, the speed of the material is faster when it runs in the position with higher working angle; the speed of the material is slower when it runs in the position with lower working angle.
When two kinds of materials running at different speeds converge at a certain position on the screen surface, they start to move axially, so that the materials are evenly distributed on the screen surface, and the screening efficiency is improved.
Rotary vibrating screen is mainly used for the classification of materials with high screening efficiency and fine screening accuracy. Fully closed structure, no flying powder, no leakage of liquid, no blocking of mesh, automatic discharge, no material storage in the machine, no dead angle of grid structure, increased screen area.
Any particle, powder and mucus can be screened within a certain range. Sieve to 500 mesh or 0.028mm, filter to 5 microns minimum. It can be used for classification, classification and filtration in food, chemical, metal, mining and other industries.
With the help of the heavy hammer installed at the upper and lower ends of the motor shaft, the rotary motion of the motor is transformed into a horizontal, vertical and inclined three-dimensional motion, which is then transmitted to the screen surface to make the material do an outward involute motion on the screen surface. Working Principle: After the rotary screen is started, the eccentric blocks of different phases at the upper and lower ends of the vibrating motor generate a composite inertia force, which forces the vibrating body of the rotary screen machine to rotate again and again, and the screen frame continuously moves to and fro under the action of the vibration force, and then drives the screen surface to vibrate periodically, so that the materials on the screen surface move in a positive and directional manner together with the screen box. Materials smaller than the screen meshes fall to the lower layer, and the materials larger than the screen meshes discharged from the discharge port.
High frequency vibrating screen is also called high frequency screen for short. High frequency vibrating screen (high frequency screen) is composed of exciter, pulp distributor, screen frame, supporting, suspension spring and screen, etc. High frequency vibrating screen is the most important screening machine in mineral processing industry, which is suitable for completely wet or dry raw materials.
Working Principle: Different from ordinary screening equipments, high frequency screen adopts high frequency, which destroys the tension on the pulp surface and makes the fine materials vibrate at high speed on the screen, accelerates the separation of useful minerals with large density (specific gravity), and increases the probability of contact between the materials with smaller than the separated particle size and the screen holes.
As a result, high frequency screen results in a better separation conditions, which makes the materials that smaller than the separation size (especially with larger specific gravity), and pulp pass through the screen holes together to complete the screening. High-frequency vibrating screen is usually operated at an inclined angle 0-25, up to 45, and the operating frequency range is 1500-7200r/m.
Grizzly screen has simple and solid structure, no power consumption, no moving parts, low equipment cost and convenient maintenance, but the productivity is low, the screening efficiency is not high, generally 50% 60%, and the mesh is easy to be blocked.
Working Principle: Generally, the grizzly screen is placed in an inclined position, and the materials are dumped at the high end. Under the action of its own weight, it slides down the screen surface, and the particles smaller than the gap or hole on the screen surface pass through the screen to achieve classification.
Banana screen is mainly suitable for the classification of large and medium-sized materials with high content of fine particles, and it can also be used for dehydration, demineralization and desliming.
Working Principle: During operation, the motor is connected with the vibration exciter through the V-belt or soft connection. The motor drives the eccentric shaft to rotate to generate centrifugal inertia force, which forces the screen box to vibrate. After the materials fall into the screen from the feeding inlet, they move forward rapidly under the action of the vibration force, loosely and pass through the screen.The thickness of the material layer of banana screen from the feeding inlet to the discharging outlet is constant. The ratio of the material quantity to the flow speed on the screen of each section is stable, the material layer is high and uniform. The screening efficiency of banana screen is higher, which is 1-2 times higher than that of other screening machines with the same effective area.
Heavy inclined screen can be applied to the treatment of debris from quarry, mine and building demolition, the treatment of topsoil, the recycling of construction materials, the screening of gravel, and the screening of gravel and aggregates.
Working Principle: The screen box shaft is driven by the motor installed on the auxiliary frame through three V-belts, the auxiliary frame is rigidly connected with the machine underframe, and the screen box spring is used to support the screen box.Inclined screen usually adopts 2-4-layer screen panels, and is fixed on the inclined frame at an angle between 15 and 30. The material can be screened into 3-5 grades at the same time.
Horizontal screen has the advantages of both inclined screen and linear vibrating screen. horizontal screen has the features of good screen permeability, large processing capacity and small installation height.
The installation angle of common vibrating screen is 15-30, while the installation of horizontal screen is parallel to the ground, or slightly inclined 0-5. Horizontal screen is an ideal equipment for all kinds of mines, quarries and mobile screening stations.
Working Principle: Horizontal screen is designed with oval stroke. The advantage of this design is that it can change the oval big diameter length and angle of throwing material stroke to meet the best needs of vibrating screen. The oval stroke is easy to adjust by center gear, counterweight wheel and motor speed.
Different types of vibrating screens can be used for the same material to get different screening effects. The reasonable selection of vibrating screen is an effective way to improve vibration efficiency and maximize economic benefits. Generally, you need to consider the following 5 tips:
When choosing vibratory screen, the material characteristics should be taken into account, including the content of material particles under the screen, the content of difficult screen particles, material moisture, the shape and specific gravity of the material, and the content of clay.
Tips: Heavy vibrating screen is used for materials above 200mm; circular vibrating screen is used for materials above 10mm; linear vibrating screen and high frequency vibrating screen are used for desliming, dewatering and grading.
When selecting the vibratory screen, the screen areas, layer numbers, shape, size and area ratio of the screen holes, as well as the motion mode, vibration frequency and amplitude of the vibrating screen should also be considered.
Tips: In order to keep the screens under good working conditions, the ratio of screen length to width should be in the range of 2-3; when there is much viscous mud and high moisture in the material, double deck screens should be avoided as far as possible.
Vibratory screens need to be selected according to different screening purposes. If it is necessary to pre screen materials, circular vibrating screens are generally used; for the classification and screening of crushed materials, large vibrating screens and probability screens are selected; for the deionization and dehydration of materials, linear vibrating screens are better; if it is necessary to desliminate and clean up materials, probability screens are used.
When selecting the shale shakers, it also needs to be considered according to the processing capacity of the production line, screening method, screening efficiency and the tilt angle of the shale shakers.
Professional vibrating screen manufacturers could provide competitive vibrating screen price, diversity customized vibrating screen models, timely after-sales service, spare parts and can continue to provide services for customers whole production circle.Get in Touch with Mechanic