top 10 vibrating screens of 2021 | screening materials - rethinkrethought
A vibrating screen is a machine made with a screening surface vibrated precisely at high speeds. It is utilized particularly for screening mineral, coal, or other fine dry materials. The screening execution is influenced essentially by different factors, for example, hardware limit and point of inclination, in which the performance can estimate by screening effectiveness and flux of the item. While this type of machine is doesnt use for DIY purposes, you may require this for industrial purposes. It is especially essential in the mineral processing industry. If you are considering buying one, check out this article and learn which vibrating screen machine may be perfect for you and your project.
Twofold vibrating engines drive a linear vibrating screen. At the point when the two vibrating engines are turning synchronously, and contrarily, the excitation power creates by the whimsical square counterbalances each other toward the path corresponding to the pivot of the engine. Then, it covers into a resultant power toward the path opposite to the hub of the engine. So, the movement becomes a straight line.
The elliptical vibrating screen is a vibrating screen with an elliptical movement track, which has the upsides of high proficiency, high screening precision, and a wide scope of use. Contrasted with the conventional strainer machine of similar detail, it has a bigger handling limit and higher screening productivity.
A circular vibrating screen is another sort of vibrating screen with a multi-layer screen and high proficiency. As per the kind of materials and the prerequisites of clients, you can use its multiple screening plates. it were introduced in the seat type. The alteration of the screen surface edge can acknowledge by changing the position and tallness of the spring support. This screen is used for mining, building materials, transportation, energy, chemical industry.
The working surface of the roller screen is made out of a progression of moving shafts that masterminded on a level plane, on which there are many screen plates. When working, the fine material goes through the hole between the roller or the screen plate. In this way, enormous squares of materials are driven by rollers, moving to the closures and releasing from the outlets. Roller screens are usually widely used in the conventional coal industry.
High frequency vibrating screen is likewise called a high-frequency screen for short. High frequency vibrating screen is made out of exciter, screen outline, supporting, suspension spring and screen, and so on. This type of vibrating screen is the most significant screening machine in the mineral preparing industry, which is reasonable for totally wet or dry crude materials.
Rotary vibrating screen principally utilize for the grouping of materials with high screening effectiveness and fine screening precision. It features a completely shut structure, no flying powder, no spillage of fluid, no obstructing of work, programmed release, no material stockpiling in the machine, no dead point of matrix structure, expanded screen territory, etc. Any molecule, powder, and bodily fluid can screen inside its specific range. The machine usually used for characterization, arrangement, and filtration in nourishment, substance, metal, mining, and some other ventures.
Horizontal screen has the benefits of both slanted screen and straight vibrating screen. The machine has the highlights of good screen penetrability, enormous handling limit, and small installed height. The establishment point of the regular vibrating screen is 15-30, while the establishment of a flat screen is corresponding to the ground, or somewhat slanted 0-5.
Heavy inclined screen can apply to the treatment of debris from the quarry, mine, and building destruction. It can also utilize in the treatment of topsoil, the reusing of development materials, the screening of rock, the screening of gravel and aggregates, etc.
Grizzly screen regularly utilizes for pre-screening before coarse and medium pulverizing of materials. The work size is by and large>50mm, yet some of the time <25mm. This machines productivity is low, but screen efficiency is not that high. Also, quite often, the mesh tends to get a block.
The banana screen has a screen plate with various areas and diverse plunge edges. The longitudinal segment is a broken line, while the entire screen resembles a banana shape. The banana screen is, for the most part, appropriate for the arrangement of huge and medium-sized materials with high substance of fine particles. It can likewise utilize for drying out and demoralization.
While you picking vibrating screens, the material qualities should consider, including the substance of material particles under the screen, the substance of troublesome screen particles, material dampness, the shape and explicit gravity of the material, and the substance of clay. Professional vibrating screens makers could give serious vibrating screen value, assorted variety redid vibrating screen models, auspicious after-deals administration, save parts, and can keep on offering types of assistance for clients entire creation circle.
vibrating screen types & working principle [how to choose] | m&c
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.
types of vibrating screens | introduction and difference
Vibrating screen is equipment for separating material sizes. There are many types of vibrating screens, such as horizontal screen, inclined screen, MD vibratory screen, rotary screen, vibratory screen, high-frequency screen, grizzly screen, dewatering screen, and other industrial screens. What is the difference between these types of vibrating screens?
Vibratory screen is a rectangular single-, double-, and multi-layer, high-efficiency new screening equipment. Vibrating screen can be divided into inclined and horizontal screen. At present, the screens range in width from 4-12 to 8-32. The screen size is usually set to 2.5 times its length and width. The width of the sieve determines the maximum carrying capacity of the sieve plate, and the length of the sieve determines the overall efficiency of the sieve plate. The vibrating screen is generally composed of a vibrator, a screen box, a supporting or hanging device, a transmission device, and others.
Horizontal screens are named because they are designed to be horizontal. The work direction of the screen is parallel to the ground or has a slope of 0 to 5. It is a triple-shaft screen, which uses for fixed and portable production lines. Compared with the inclined screen, it is more accurate and effective to determine the size and separate materials. This is because the material is retained on the screen for a longer period of time, which allowing sufficient time for the sized material to fall off the screen. The screen has the advantages of simple structure, reliable performance, large screening capacity, and economical use. Its low power consumption and low maintenance cost, it is the simplest and most practical screening equipment in the quarry crusher plant.
Vibrating inclined screen is the most popular types of vibrating screens. The screen fix to the tilted frame at an angle of 15 to 30 degrees. The inclined screen is usually designed in a multi-layer structure and can be classified into 2-5 grades. And the screen can be adjusted to provide overall performance and efficiency. We can adjust the slope, speed, and direction according to the application.
The inclined screen consists of eight basic components, namely side wall, platform, screening medium, actuator, motor, motor console, spring, and the spring bracket. The key factor of inclined screen equipment is its weldless design. All the 8 basic screen parts are assembled by bolt and nut connections to prevent screen cracking and failure due to welding.
MD vibrating screen is a compact, high capacity dry screen. It widely used in industries of dry sand, fertilizer, iron ore, wood chips, limestone, and others. It can screen more tons per hour. Compare with the traditional screening equipment, its processing capacity is bigger. Because of its excellent design, it takes up less space and reduces the size of the screen layer by layer. As a result, it can screen out products of many different sizes at the same time.
The trommel screen uses continuous rolling and lifting motions to screen and separate raw materials. These materials include municipal waste, recycling, industry, aggregates, and mining. This screen is a kind of machine which is widely used in separation technology. By the size of the particle size to control the screening. The barrel of the screen is generally divided into several sections which depending on the specific circumstances. The screen holes from small to large arrangements, each section on the same size as the screen hole. The screening equipment features: screen hole is not easy to plug. The screen cylinder can be closed, easy to close the dust collection. Adopt Special Screen Mesh, high screening efficiency, and long service life.
As the cylinder of the rotating sieve rotates, the raw material is lifted from the shelf until it is near the top of the cylinder. Then, the material falls, landing on other material at the bottom of the drum. This operation helps to break down the softer parts as well as separate the different types of materials. As the tumbling continues, smaller fractions are filtered through holes in the sieve plate. While the larger material continues along the length of the cylinder, finally discharging.
High-frequency screen with high efficiency, small amplitude, high screening frequency. It is effective equipment for screening and classification of fine-grained materials. It is widely used in screening and classification of iron ore, tin, tungsten, tantalum, and niobium. For the high-frequency screen, it is solely for the purpose of dehydration wet screening. Therefore, we hope to form a filtering layer on the screen surface as soon as possible, so as to block the passage of fine coal. Thus reducing the loss of solid materials in water and improving the recovery rate of solid. If the screen surface amplitude is too large, it will destroy the filter layer. Wet screening doesnt require large amplitudes.
High-frequency screen with high frequency can destroy the pulp surface tension and fine material in screen surface high-speed oscillation. This operation not only accelerates the density of useful minerals and segregation but also increases the probability of less than the size of the separation material in contact with the screen hole. Thus create a better separation condition which made the material smaller than the separation granularity. In particular, a large density of material and pulp together through the screen hole sieve out. It can provide higher capacity and more efficient dimensions than traditional screening devices.
Grizzly screen is universal screen equipment with special screen surface. Its biggest characteristic lies in its high screening efficiency, large relative processing capacity and not easy to plug holes. Especially suitable for high moisture, viscous material screening. It is widely used in the coal mine, chemical industry, metallurgy, electric power, building materials, and other industries that the medium-sized granular material classification. The advantages of the grizzly screens are a simple structure, convenient maintenance, high strength, impact resistance, wear resistance, low noise and so on.
Working principle: Grizzly screen is composed of many bars. Screen surface and horizontal composition of an angle. When screening ore dip angle is 40 ~ 45. When screening wet material dip angle increases 5 ~ 10. The material is fed through the upper end of the screen. The ore block larger than the size of the screen hole slides automatically along the screen surface. The ore block smaller than the size of the screen hole falls through the screen hole.
Dewatering screen is the main role of dewatering, desliming, desilting medium. It is used for sand washing plants, coal slime recovery in the coal preparation plants, tailings dry discharge in the mineral processing plants, etc. Therefore, it is also called sand dewatering screen, mine dewatering screen, slime dewatering screen, tailings dry drainage screen, high-frequency dewatering screen, etc.
The screen Mesh adopts super high molecular polyurethane material, impact resistance, corrosion resistance, wear resistance. The screen box is made of stainless steel. The screening machine is especially suitable for treating fine-grained minerals. It can also be used in combination with a cyclone. Dewatering efficiency is very high and widely used in tailings dry discharge, dewatering, and other operations.
Jiangxi Shicheng stone crusher manufacturer is a new and high-tech factory specialized in R&D and manufacturing crushing lines, beneficial equipment,sand-making machinery and grinding plants.
vibrating screens - kinergy
A Dust-Tight Screening Feeder to a Secondary Crusher. It is 11 ft. (3.2 m) wide, 40 ft. (12.2 m) long and 48 (1.2 m) deep. Rated 2000 TPH of Limestone that screens the less than 6 rock, it consumes 45 hp (34 kW).
The adaptation of the patented Kinergy Drive System to Vibrating Screens is recognized as the most significant advancement in Vibrating Screens in more than 60 years! For the first time in their long history, Vibrating Screens have the most operating versatility and Energy Efficiency.
One of the reasons for this proclamation is the full range of electrical adjustment enables all these Vibrating Screens to also perform as a Feeder. The operating versatility enables sticky (adhesive) bulk solids to be screened by utilizing the automatic and repetitive pulsing kind of vibratory action.
Another is these Vibrating Screens make use of Kinergys drive technology to incorporate an underside collecting pan for the passed unders. Thus, the steep walled collecting hopper is eliminated. That reduces the height of the building or the screening tower; thereby reducing the costs of construction and added operating expense.
Kinergys linear stroke Screens allow the unit to be placed horizontally or on a shallow decline; whereas, Screens with a circular or elliptical type of vibratory motion are often required to be declined 20 for the force of gravity to assist in the needed conveying.
Kinergy Vibrating Screens are the most Energy Efficient, require minimal maintenance, operate quietly and have an electrically adjustable stroke and operating frequency. All of these features combine to ensure the best performance level.
Cleaning Unit Pieces: These single-screening deck units rely on vibration to remove clinging particles, trim edges, or anything similar from unit pieces. Example: Cleaning the various types of briquettes, pressed logs, dried pellets, or shaking off adhered sand from metal castings.
Washing: A bulk solid or unit piece can be washed while its being conveyed by mounting rows of liquid sprays directly over the screen. The liquid spray can be water, oil, liquid detergent, a chemical solution, etc.
Removing Undersize: This is also known as de-dusting, fines removal or shaking out the small size.
Grading: This method is a close particle to particle or particle from slivers type of separation. As the most demanding of the sizing functions, multiple screening decks will be required.
Lowering Height: Kinergys Vibrating Screens can be installed horizontally or on a slight decline which reduces the height of the needed building or screening tower. Construction cost is reduced and the daily operating expense is less because of the lower elevation.
Energy Efficiency: All the Screens utilize the Kinergy Drive System, which is the most versatile and energy efficient drive available. This drive is a combination of a free force input from an A.C. type electric motor with the output of sub-resonant tuned springs. When the applied load increases, the springs inherently drive harder. It maximizes the use of Kinergy which is defined as the kinetic energy developed by a springs motion during the drive portion of its cycle. Thus, a 50 to 65% power reduction can be achieved.
Dust-Tight Construction: Kinergy Vibrating Screens are environmentally friendly. They can be made with dust-tight bodies that have a bolted top cover with quick opening viewports to observe the screening.
Bottom Drive Design: The Kinergy Vibratory Drive System is preferred to be located underneath the Screen body. The added bottom conveying pan for collecting the passed unders enables it most access to the screening decks. It is easier for dust-tight construction and it eliminates the need for the previously used steep walled collecting hopper located underneath.
Top Drive Design: The drive system is located above the Screen body. Typically the underside of the screening unit is completely open to permit the discharge of the unders across its width and length. If it is needed, a full length unders conveying trough can be supplied which makes the unit more readily adaptable to being dust-tight.
Operating Versatility: The operating stroke and frequency is electrically adjustable. This enables the Vibrating Screens to be automatically and repetitively Pulsed with a more vigorous vibratory action. This helps to minimize blinding of the screen media and to minimize particle adhesion.
Larger Dimensions: Kinergy Vibrating Screens can be manufactured in larger dimensions. Since the input dynamic forces are distributed, the diameter or length and width dimensions are not restricted as they would be if they were concentrated at one point. This is the reason Kinergy Driven Vibrating Screens that are unidirectional are standardized in widths to 18 ft. and lengths as required.
Minimal Maintenance: Two specific design features make Kinergy Vibrating Screens a low maintenance option. First, using components specifically designed to endure the vibratory action, the maintenance requirements decrease remarkably. Second, three components make up the drive system. These components can be changed in less than one hour by two reasonably skilled technicians. No qualified journeymen are required.
Performing as a Feeder: All Kinergy Vibrating Screens can also perform the feeding function. Install the Kinergy Vibrating Screen under the outlet of the Bin or Silo. Use the electrical control to adjust the Screening units output from zero to the maximum TPH.
Common Components: Kinergy Vibrating Screens minimize the amount of spare parts kept in stock. Most of the component parts are interchangeable with other Kinergy Driven units even though their functions may differ. These common components extend to Kinergy Vibrating Feeders, Conveyors, Fluid Bed Coolers and Dryers, Spiral Elevators and the various types of Foundry units. This reduces the number of spare parts required in inventory.
Kinergy engineers have been industry leaders in the field of Vibratory Screens for over thirty years. To learn more about Kinergys Vibrating Screens, please call today at 502.366.5685 or download Kinergys descriptive Bulletin KDVS-1 entitled Kinergy Driven Vibrating Screens.
Realizing vibrations can be very destructive, Engineers seldom considered intentionally creating vibrations in a machine to perform a beneficial function. Even so, over the years and by taking advantage of the principle of Natural Frequency, these purposely vibrated machines have been gradually but steadily improved. Thus, these Electro-Mechanical Machines now have more Electrical Operating Versatility and are ranked among the most Energy Efficient available. This history and the progressive evolution are explained in the Booklet entitled Introducing Vibratory Machines for Material Handling. The booklet is intended to be educational and is available upon request.