Crushing and screening processes are integral to the mining and construction industries. In both the sectors, the need for fast and efficient crushing and screening operations is vital and it makes a sea difference in terms of quality and productivity. This is the prime reason, customers nationwide bank on PROPEL INDUSTRIES for innovative, technologically-sound and cost-effective solutions.
We have been getting high level of production and till now the plant is working to our utmost satisfaction which helps us to produce best quality Aggregates and Sand. We greatly appreciate Propel's efficiency in providing the best quality of Products and Services. Especially the efforts of the company is being reflected in the quality of the spare and wear parts which gives longer life time.
Being we one of the biggest sand stone crushing industries in Uttrakhand and Rajastan area Propel's machines have utilized to yield a maximum productivity of 20,000 to 30,000 tons per day. The Cubical aggregate shape with excellent fines / sand (Zone II) gradation is the unique feature Propel's crushers. The overall performance of the product and Services offered by the company is found to be satisfactory.
Solid shakers are intensive vibrating device for mud separation or removal of large solids from drilling mud as they improve the economy in rigs, coal and mining fields etc. Shale shakers are equipments that are used in oil and gas drilling applications and further they are also used in mining, coal cleaning, chemical and plastic industries. The shale shakers are an important equipment in solid control system where it remove large solid particles from drilling fluid in a drilling rig.
The key advantage of shale shakers is that it plays a vital role in reducing the costs that is associated with the drilling fluids. Among the technologies the linear motion shale shaker are widely used in oil and gas drilling applications for drilling mud solid control. The linear motion shale shakers have advantages due to wide screen area, cost-effective and compressed structure.
The recent development in offering a combo pack which covers desander, desilter and shale shaker in a single unit is driving the market growth of global shale shakers market. The adoption of shale shakers in the offshore drilling platforms is finding a leading growth trend and it will anticipate the market growth of shale shakers. The key driving factor for shale shakers is it offers outstanding throughput capacity and solids separation efficiency. The end users are looking for advanced shale shakers with less screens so as to increase their efficiency and to reduce the operating budget.
The oil and gas exploration, drilling and production are finding a major growth in the last decade but installation of shale shaker for solid removal in waste disposal, paper, powder, and sand, plastic and mining of precious metal will have higher growth rate. In addition to that, the dual deck and triple deck shale shakers are finding major growth opportunity as they offers higher efficiency in solid separation. The key challenge in the shale shakers market is the trade war between the US and China as they are among the leading oil and gas producing countries in the world.
The growing number of oil and gas drilling and production activities have driven the market growth for global shale shakers market. The countries such as Thailand, Indonesia, Brazil, Nigeria, Argentina etc. are expected to have major growth opportunities in terms of new oil and gas drilling activities which will drive the installation of shale shakers. The growing consumption natural gas is an important factor as it is enhancing the production activities which drives the global shale shakers market.
The manufacturers of shale shakers are widely spread and the leading manufacturers are presented in the US, China, Western Europe and India. The suppliers are widely spread in the leading oil and gas producing countries and the export of shale shakers from China and other Asian countries to Middle East, Russia and Africa is driving the market revenue for global shale shakers market.
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Skillful construction of vibrating screen for wide area of industries has made us popular as leading manufacturer and exporter of best quality vibrating screens. We have developed broad series of vibrating screens likecircular vibrating screen,gyro multi deck screen machine, rectangular multi deck screen machine, rotary screen, dynamic separator and custom screening. Best reviews for our screens from varied industry have inspired us to widen our trade to more functional areas worldwide. We enjoy successful performance of our products in Zambia, Malaysia, Indonesia, Oman, Dubai, Saudi Arabia, Vietnam and many more countries worldwide.
We provide immense variety ofvibrating screens for varied industrial requirements. to cover different industrial segments, we have expand the fringe of our trade toBangladesh, Sri Lanka, Bhutan, Kazakhstan, Kenya, Nigeria, Morocco, Maliand other countries. We offer vibrating screens for separation, vibrating screen for grading, vibrating screen for extracting and many more.
We also offer vibrating screen forscreening equipment, vibrating screen for separation,vibrating screenfor grinding, vibrating screen for crushing, vibrating screen for drying, vibrating screen for ceramics and many more industrial applications.Mixture Machine Manufacturer | Manganese Oxide Pellet Plant Manufacturer | Lime Calcination Plant Manufacturer | Calcination Process Equipment Manufacturer | Grinding Equipment Manufacturer | Crushing Equipment Manufacturer | Conveying Equipment Manufacturer | Automized Packing And Stitching Units | Continuous Ball Mill Manufacturer | Calcination Process Equipment | Calcination Process Equipment Manufacturer | Manganese Oxide Pellet Plant | Single Toggle Jaw Crusher Manufacturer | Disintegrator Mill Manufacturer | Batch Type Ball Mill Manufacturer | Gyro Multi Deck Screen Machine | Rectangular Multi Deck Screen Machine | Pelletizing Equipmentdia. We have also approached the various industrial areas ofNigeria, South Africa, Qatar, Saudi Arabia, Ghana, Greeceand more countries worldwide.
When the smaller rock has to be classified a vibrating screen will be used.The simplest Vibrating Screen Working Principle can be explained using the single deck screen and put it onto an inclined frame. The frame is mounted on springs. The vibration is generated from an unbalanced flywheel. A very erratic motion is developed when this wheel is rotated. You will find these simple screens in smaller operations and rock quarries where sizing isnt as critical. As the performance of this type of screen isnt good enough to meet the requirements of most mining operations two variations of this screen have been developed.
In the majority of cases, the types of screen decks that you will be operating will be either the horizontal screen or the inclined vibrating screen. The names of these screens do not reflect the angle that the screens are on, they reflect the direction of the motion that is creating the vibration.
An eccentric shaft is used in the inclined vibrating screen. There is an advantage of using this method of vibration generation over the unbalanced flywheel method first mentioned. The vibration of an unbalanced flywheel is very violent. This causes mechanical failure and structural damage to occur. The four-bearing system greatly reduces this problem. Why these screens are vibrated is to ensure that the ore comes into contact will the screen. By vibrating the screen the rock will be bounced around on top of it. This means, that by the time that the rock has traveled the length of the screen, it will have had the opportunity of hitting the screen mesh at just the right angle to be able to penetrate through it. If the rock is small enough it will be removed from the circuit. The large rock will, of course, be taken to the next stage in the process. Depending upon the tonnage and the size of the feed, there may be two sets of screens for each machine.
The reason for using two decks is to increase the surface area that the ore has to come into contact with. The top deck will have bigger holes in the grid of the screen. The size of the ore that it will be removed will be larger than that on the bottom. Only the small rock that is able to pass through the bottom screen will be removed from the circuit. In most cases the large rock that was on top of each screen will be mixed back together again.
The main cause of mechanical failure in screen decks is vibration. Even the frame, body, and bearings are affected by this. The larger the screen the bigger the effect. The vibration will crystallize the molecular structure of the metal causing what is known as METAL FATIGUE to develop. The first sign that an operator has indicated that the fatigue in the body of the screen deck is almost at a critical stage in its development are the hairline cracks that will appear around the vibrations point of origin. The bearings on the bigger screens have to be watched closer than most as they tend to fail suddenly. This is due to the vibration as well.
In plant design, it is usual to install a screen ahead of the secondary crusher to bypass any ore which has already been crushed small enough, and so to relieve it of unnecessary work. Very close screening is not required and some sort of moving bar or ring grizzly can well be used, but the modern method is to employ for the purpose a heavy-duty vibrating screen of the Hummer type which has no external moving parts to wear out ; the vibrator is totally enclosed and the only part subjected to wear is the surface of the screen.
The Hummer Screen, illustrated in Fig. 6, is the machine usually employed for the work, being designed for heavy and rough duty. It consists of a fixed frame, set on the slope, across which is tightly stretched a woven-wire screen composed of large diameter wires, or rods, of a special, hard-wearing alloy. A metal strip, bent over to the required angle, is fitted along the length of each side of the screen so that it can be secured to the frame at the correct tension by means of spring-loaded hook bolts. A vibrating mechanism attached to the middle of the screen imparts rapid vibrations of small amplitude to its surface, making the ore, which enters at the top, pass down it in an even mobile stream. The spring-loaded bolts, which can be seen in section in Fig. 7, movewith a hinge action, allowing unrestricted movement of the entire screening surface without transmitting the vibrations to the frame.
One, two, or three vibrators, depending on the length of the screen, are mounted across the frame and are connected through their armatures with a steel strip securely fixed down the middle of the screen. The powerful Type 50 Vibrator, used for heavy work, is shown in Fig. 7. The movement of the armature is directly controlled by the solenoid coil, which is connected by an external cable with a supply of 15-cycle single-phase alternating current ; this produces the alternating field in the coil that causes the up-and-down movement of the armature at the rate of thirty vibrations per second. At the end of every return stroke it hits a striking block and imparts to the screen a jerk which throws the larger pieces of ore to the top of the bed and gives the fine particles a better chance of passing through the meshes during the rest of the cycle. The motion can be regulated by spiral springs controlled by a handwheel, thus enabling the intensity of the vibrations to be adjusted within close limits. No lubrication is required either for the vibrating mechanism or for any other part of the screen, and the 15-cycle alternating current is usually supplied by a special motor-generator set placed somewhere where dust cannot reach it.
The Type 70 Screen is usually made 4 ft. wide and from 5 to 10 ft. in length. For the rough work described above it can be relied upon to give a capacity of 4 to 5 tons per square foot when screening to about in. and set at a slope of 25 to 30 degrees to the horizontal. The Type 50 Vibrator requires about 2 h.p. for its operation.
The determination of screen capacity is a very complex subject. There is a lot of theory on the subject that has been developed over many years of the manufacture of screens and much study of the results of their use. However, it is still necessary to test the results of a new installation to be reasonably certain of the screen capacity.
A general rule of thumb for good screening is that: The bed depth of material at the discharge end of a screen should never be over four times the size opening in the screen surface for material weighing 100 pounds per cubic foot or three times for material weighing 50 pounds per cubic foot. The feed end depth can be greater, particularly if the feed contains a large percentage of fines. Other interrelated factors are:
Vibration is produced on inclined screens by circular motion in a plane perpendicular to the screen with one-eighth to -in. amplitude at 700-1000 cycles per minute. The vibration lifts the material producing stratification. And with the screen on an incline, the material will cascade down the slope, introducing the probability that the particles will either pass through the screen openings or over their surface.
Screen capacity is dependent on the type, available area, and cleanliness of the screen and screenability of the aggregate. Belowis a general guide for determining screen capacity. The values may be used for dried aggregate where blinding (plugged screen openings), moisture build-up or other screening problems will not be encountered. In this table it is assumed that approximately 25% of the screen load is retained, for example, if the capacity of a screen is 100 tons/hr (tph) the approximate load on the screen would be 133 tph.
It is possible to not have enough material on a screen for it to be effective. For very small feed rates, the efficiency of a screen increases with increasing tonnage on the screen. The bed of oversize material on top of the marginal particlesstratification prevents them from bouncing around excessively, increases their number of attempts to get through the screen, and helps push them through. However, beyond an optimum point increasing tonnage on the screen causes a rather rapid decrease in the efficiency of the screen to serve its purpose.
Two common methods for calculating screen efficiency depend on whether the desired product is overs or throughs from the screen deck. If the oversize is considered to be the product, the screen operation should remove as much as possible of the undersize material. In that case, screen performance is based on the efficiency of undersize removal. When the throughs are considered to be the product, the operation should recover as much of the undersize material as possible. In that case, screen performance is based on the efficiency of undersize recovery.
These efficiency determinations necessitate taking a sample of the feed to the screen deck and one of the material that passes over the deck, that is, does not pass through it. These samples are subjected to sieve analysis tests to find the gradation of the materials. The results of these tests lead to the efficiencies. The equations for the screen efficiencies are as follows:
In both cases the amount of undersize material, which is included in the material that goes over the screen is relatively small. In Case 1 the undersize going over the screen is 19 10 = 9 tph, whereas in Case 2 the undersize going over is 55 50 = 5 tph. That would suggest that the efficiency of the screen in removing undersize material is nearly the same. However, it is the proportion of undersize material that is in the material going over the screen, that is, not passed through the screen, that determines the efficiency of the screen.
In the first cases the product is the oversize material fed to the screen and passed over it. And screen efficiency is based on how well the undersize material is removed from the overs. In other cases the undersize material fed to the screen, that is, the throughs, is considered the product. And the efficiency is dependent on how much of the undersize material is recovered in the throughs. This screen efficiency is determined by the Equation B above.An example using the case 1 situation for the throughs as the product gives a new case to consider for screen efficiency.
Generally, manufacturers of screening units of one, two, or three decks specify the many dimensions that may be of concern to the user, including the total headroom required for screen angles of 10-25 from the horizontal. Very few manufacturers show in their screen specifications the capacity to expect in tph per square foot of screen area. If they do indicate capacities for different screen openings, the bases are that the feed be granular free-flowing material with a unit weight of 100 lb/cu ft. Also the screen cloth will have 50% or more open area, 25% of total feed passing over the deck, 40% is half size, and screen efficiency is 90%. And all of those stipulations are for a one-deck unit with the deck at an 18 to 20 slope.
As was discussed with screen efficiencies, there will be some overs on the first passes that will contain undersize material but will not go through the screen. This material will continue recirculating until it passes through the screen. This is called the circulating load. By definition, circulating load equals the total feed to the crusher system with screens minus the new feed to the crusher. It is stated as a percentage of the new feed to the crusher. The equation for circulating load percentage is:
To help understand this determination and the equation use, take the example of 200 tph original or new material to the crusher. Assume 100% screen efficiency and 30% oversize in the crusher input. For the successive cycles of the circulating load:
The values for the circulating load percentages can be tabulated for various typical screen efficiencies and percents of oversize in the crusher product from one to 99%. This will expedite the determination for the circulating load in a closed Circuit crusher and screening system.
Among the key factors that have to be taken into account in determining the screen area required is the deck correction. A top deck should have a capacity as determined by trial and testing of the product output, but the capacity of each succeeding lower deck will be reduced by 10% because of the lower amount of oversize for stratification on the following decks. For example, the third deck would be 80% as effective as the top deck. Wash water or spray will increase the effectiveness of the screens with openings of less than 1 in. in size. In fact, a deck with water spray on 3/16 in. openings will be more than three times as effective as the same size without the water spray.
For efficient wet or dry screeningHi-capacity, 2-bearing design. Flywheel weights counterbalance eccentric shaft giving a true-circle motion to screen. Spring suspensions carry the weight. Bearings support only weight of shaft. Screen is free to float and follow positive screening motion without power-consuming friction losses. Saves up to 50% HP over4- bearing types. Sizes 1 x 2 to 6 x 14, single or double deck types, suspended or floor mounted units.Also Revolving (Trommel) Screens. For sizing, desliming or scrubbing. Sizes from 30 x 60 to 120.
TheVibrating Screen has rapidly come to the front as a leader in the sizing and dewatering of mining and industrial products. Its almost unlimited uses vary from the screening for size of crusher products to the accurate sizing of medicinal pellets. The Vibrating Screen is also used for wet sizing by operating the screen on an uphill slope, the lower end being under the surface of the liquid.
The main feature of the Vibrating Screen is the patented mechanism. In operation, the screen shaft rotates on two eccentrically mounted bearings, and this eccentric motion is transmitted into the screen body, causing a true circular throw motion, the radius of which is equivalent to the radius of eccentricity on the eccentric portion of the shaft. The simplicity of this construction allows the screen to be manufactured with a light weight but sturdy mechanism which is low in initial cost, low in maintenance and power costs, and yet has a high, positive capacity.
The Vibrating Screen is available in single and multiple deck units for floor mounting or suspension. The side panels are equipped with flanges containing precision punched bolt holes so that an additional deck may be added in the future by merely bolting the new deck either on the top or the bottom of the original deck. The advantage of this feature is that added capacity is gained without purchasing a separate mechanism, since the mechanisms originally furnished are designed for this feature. A positivemethod of maintaining proper screen tension is employed, the method depending on the wire diameter involved. Screen cloths are mounted on rubber covered camber bars, slightly arched for even distribution.
Standard screens are furnished with suspension rod or cable assemblies, or floor mounting brackets. Initial covering of standard steel screen cloth is included for separations down to 20 mesh. Suspension frame, fine mesh wire, and dust enclosure are furnished at a slight additional cost. Motor driven units include totally-enclosed, ball-bearing motors. The Vibrating Screen can be driven from either side. The driven sheave is included on units furnished without the drive.
The following table shows the many sizes available. Standard screens listed below are available in single and double deck units. The triple and quadruple deck units consist of double deck units with an additional deck or decks flanged to the original deck. Please consult our experienced staff of screening engineers for additional information and recommendations on your screening problems.
An extremely simple, positive method of imparting uniform vibration to the screen body. Using only two bearings and with no dead weight supported by them, the shaft is in effect floating on the two heavy-duty bearings.
The unit consists of the freely suspended screen body and a shaft assembly carried by the screen body. Near each end of the shaft, an eccentric portion is turned. The shaft is counterbalanced, by weighted fly-wheels, against the weight of the screen and loads that may be superimposed on it. When the shaft rotates, eccentric motion is transmitted from the eccentric portions, through the two bearings, to the screen frame.
The patented design of Dillon Vibrating Screens requires just two bearings instead of the four used in ordinary mechanical screens, resulting in simplicity of construction which cuts power cost in half for any screening job; reduces operating and maintenance costs.
With this simplified, lighter weight construction all power is put to useful work thus, the screen can operate at higher speeds when desired, giving greater screening capacity at lower power cost. The sting of the positive, high speed vibration eliminates blinding of screen openings.
The sketches below demonstrate the four standard methods of fastening a screen cloth to the Dillon Screen. The choice of method is generally dependent on screen wire diameters. It is recommended that the following guide be followed:
Before Separation can take place we need to get the fine particles to the bottom of the pile next to the screen deck openings and the coarse particles to the top. Without this phenomenon, we would have all the big particles blocking the openings with the fines resting atop of them and never going through.
We need to state that 100% efficiency, that is, putting every undersize particle through and every oversize particle over, is impossible. If you put 95% of the undersize pieces through we in the screen business call that commercially perfect.
High-Speed Vibrating Screens come in a variety of models, sizes, configurations and accessories for wet and dry screening. Screens may be inclined or horizontal, open or enclosed, customized from a variety of screen media and accessories. Speeds and amplitudes will be optimized for the application, within a range of 0.100 in. to .500 in. total amplitude, at frequencies selected to produce peak acceleration between 4 and 6 gs. Deck slope, also optimized for your application, will range from 11 deg. to 20 deg. In single, double or triple-deck models, screen sizes go up from 3 ft. x 6 ft. to 8 ft. x 20 ft.
Inclined screens are vibrated by a single, two-bearing, unbalanced rotor mounted concentrically or eccentrically with respect to the centroidal axis of the screen. Overhead-mounted rotors, designated OHV, generate a slightly rocking motion. The forward-inclined ellipse at the feed end accelerates incoming material to promote initial screening while the slightly backward-inclined ellipse at the discharge retards the oversize travel rate to help in the final removal of near-size particles.
Concentrically-mounted rotors generate a uniform circular motion over the length of the screen, from feed to discharge, moving oversize material smoothly at a uniform rate. Inclined screens with concentric rotor mountings, designated CV, are less susceptible to blinding in coarse screening of acicular or spikey particle shapes than units with overhead mountings.
Incline vibrating screens offer lowest cost per ton hour, and can handle heavy oversize burdens, at somewhat compromised precision in sizing compared with the horizontal. T/SD inclined screens are made in sizes ranging from 2 x 4 to 10 x 24. Speeds and amplitudes can be field-adjusted to optimize performance.
Horizontal vibrating screens are available in the same sizes as the equivalent two-bearing inclined models. A pair of gear-coupled, parallel-shaft unbalanced rotors in an enclosed full-width vibrator module applies the straight-line inertia force that generates the receiptrocating motion of the screen box. The module is mounted so that its line of action passes through the center of gravity of the screen box, which moves in a straight-line, reciprocating pitching motion that conveys as it screens. This contrasts with the circular motion of the inclined screen, which depends on its downward slope to move the retained material over the screen.
The vertical components of the vibrating motion expands the oversize material bed to create extra voidage through which the undersize rapidly settles and finds its way to the screen openings. To control its tendency to produce a landslide effect, the inclined screen is limited to lower maximum amplitudes than the horizontal. The greater amplitude required to propel the retained material over a horizontal surface improves stratification, and because the material cant roll or slide on the level surface, the horizontal screen is generally considered to be more efficient than the inclined.
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.
Rotary motion of the motor change into the horizontal, vertial and inclined sports through the installation of the ends of the weight on the vibration motor, and then transfer the motion to the surface of the scr...
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Type VEHICLE PROPERTY Kosatka A Kosatka in Grand Theft Auto Online. (Rear quarter view) Vehicle class Boats Vehicle type Military vessel Body style Submarine Capacity 32 [citation/verification needed] Occupant(s) GTA Online ProtagonistOrganizationsMotorcycle ClubsPavel Appears in Grand Theft Auto Online [DLC] [EV] Manufacturer RUNE Price $2,200,000 - $9,085,000 (Warstock Cache & Carry) Stored Vehicles SparrowAvisaToreador (Optional)Stromberg (Optional) Miscellaneous Information Radar Icon  Swankness 2/5 Dashboard Type Maverick (needle) Interior Type Worn Traffic-default Color(s) No.PSPrlWTD121463015824 Default Wheel Type Sport Flag(s) Kosatka No Boot Extras Require Extras Strong Peds Can Stand On Top Driver No Drive By Headlights Use Actual Bone POS Don't Spawn as Ambient Give Scuba Gear On Exit Force Bonnet Camera Instead of POV Latch All Joints Cannot Be Picked Up By Cargobob Use Aircraft Style Weapon Targeting Reject Entry To Vehicle When Stood On Allow Object Low LOD Collision Use Length Of Vehicle Bounds For Player Lock-On PositionMissileAmmo Add smoke on explosionProjectile Destroy On Impact Process Impacts Do Ground Disturbance FxWeapon Gun Homing Vehicle Enforce Aiming Restrictions Use Vehicle Weapon Bone Forward Use Manual Targeting ModeTorpedoProjectile Destroy On Impact Process Impacts Thrust UnderwaterWeapon Can Lock-on In Vehicle Homing Vehicle Enforce Aiming Restrictions Use Vehicle Weapon Bone Forward Use Manual Targeting Mode Model Name(s) kosatka Handling Name(s) KOSATKA Text Label Name(s) KOSATKA Population Information Spawns Naturally? No Max Number of same color 10 Spawn Frequency 100 Distance between identical models 20 License Plates Standard White - 100%
No Boot Extras Require Extras Strong Peds Can Stand On Top Driver No Drive By Headlights Use Actual Bone POS Don't Spawn as Ambient Give Scuba Gear On Exit Force Bonnet Camera Instead of POV Latch All Joints Cannot Be Picked Up By Cargobob Use Aircraft Style Weapon Targeting Reject Entry To Vehicle When Stood On Allow Object Low LOD Collision Use Length Of Vehicle Bounds For Player Lock-On Position
The RUNE Kosatka (Russian: , lit. "Killer Whale") is a large, Propaganda Class nuclear-powered, guided missile submarine featured in The Cayo Perico Heist update for Grand Theft Auto Online.
The vessel is a large cylindrical Teardrop hulled submarine with a length exceeding that of the Galaxy Super Yacht. The bow is spherical with a player-selected flag marked in the center, just below the surfaced waterline. A vertical sail (incorrectly referred to in game as a Conning tower) with horizontal diving planes is located a quarter of the length back from the bow of the vessel. This is marked at the front with a Russian heraldic shield featuring a two-headed-eagle, 1896, the player's flag, a five-pointed star and the Cryllic character. The flag is repeated on the side of the sail along with a prominent 81 numeric stencil. A light and mast are atop the sail, with the former able to be toggled on or off when submerged.
Immediately aft of the sail, a raised rectangular "hump" extends for approximately one third of the length of the sub. This houses the interior Moon Pool and Guided missile systems. Eight permanently open missile tubes are present in two rows of four. Plating sections on the hull forward of the missile tubes are indicative of the Moon Pool helicopter entrance hatch. Similar underside plating indicates the entry point for the submersible Moon Pool bays. The hump section tapers down to the tail where stabilizing fins and the twin seven-fin propellers can be seen. Inlet valves for the ballast system can be seen under the aft section of the boat.
As an enormous submarine, the Kosatka handles relatively poorly due to its sheer size. The Kosatka is difficult to operate or perform evasive maneuvers. However, it has surprisingly good turning capabilities and while it has much slower acceleration, it has a high top speed that allows it to rival the Dinghy, due to its enormous engine and propellers.
The large frame and length of the Kosatka limits most of its presence to open water and will struggle to move in shallow waters and rivers, risking beaching if the submarine attempts to negotiate overly shallow or convoluted shorelines. It is also very hard to dock, requiring the player to step in water unless it is parked, for example, at the Del Perro Pier.
The Kosatka submerges and surfaces in a manner that befits a vessel of its size, and it is unable to descend nor rise at an angle as sharp as the other submersibles in the game, instead rising and descending almost horizontally.
While piloting the boat, there are only two camera views available, a long follow camera, and a First Person/Hood cam view which is positioned immediately on top of the crest on the sail overlooking the bow.
While driving, the player may engage an autopilot function (similar to that used on the Avenger) and leave the helm with the boat remaining in place. This also allows the vessel to remain underwater and avoid most threats, although this limits access for the Sparrow.
The Kosatka is one of the weakest command centers in the game, only able to withstand 12 homing rockets before destruction. Paired with its sluggish mobility and enormous frame, the Kosatka is extremely vulnerable to damage and can be destroyed by enemy aircraft and even other submarines in direct engagements. It is virtually immune to small arms fire and regular bullets.
However, the Kosatka is capable of staying off radar if submerged underwater, allowing it to stay hidden from enemies unless they are in close proximity to the submarine, or own a Sonar System upgrade for their own Kosatka.
It should be noted that due to its nature as a naval vessel, it can be difficult to even reach the Kosatka, allowing the submarine to keep its distance from the mainland and firmly out of range of threats such as the Homing Launcher and RPG. Only vehicles like the Stromberg and the Toreador can reach the submarine and outmaneuver it, so players have to be aware of such threats.
While seated at the Helm, the owner can choose to Fast Travel to set locations, similar to the Yacht. This will cost $10,000 per trip or $2,000 after completion of The Cayo Perico Heist as leader. Locations available:
The player can modify the vehicle options at any time by re-visiting Warstock Cache & Carry and re-specifying the customization options, but will not receive any credit for previously paid for options.
DLC Content Vehicles The Cayo Perico Heist | Los Santos Summer Special | The Diamond Casino Heist | The Diamond Casino & Resort | Arena War | After Hours | Southern San Andreas Super Sport Series | The Doomsday Heist | Smuggler's Run | Gunrunning | Cunning Stunts: Special Vehicle Circuit | Import/Export | Bikers | Cunning Stunts | Further Adventures in Finance and Felony | Lowriders: Custom Classics | Be My Valentine | January 2016 Update | Festive Surprise 2015 | Executives and Other Criminals | Halloween Surprise | Lowriders | Ill-Gotten Gains Part 2 | Ill-Gotten Gains Part 1 | Heists Update | Festive Surprise | Last Team Standing Update | San Andreas Flight School Update | Independence Day Special | I'm Not a Hipster Update | High Life Update | The Business Update | Valentine's Day Massacre Special | Beach Bum UpdateGet in Touch with Mechanic