A vibrating screen is a necessary machine for mining and quarrying industries. In the quarrying field, the screening process always follows the primary and secondary crushing stages to divide rock material into more than three sizes from coarse to fine.
Actually, how many sizes of material do you want to get depends on how many screen decks you adding to the machine, which greatly improves the value of raw material. Besides, the vibrating screen also plays a key role in the ore mining industry where ore beneficiation process has strict requirements on the size of ore. For example, before entering a ball grinding mill, ores must get their size meet a ball mill opening size, and be not containing impurities with the help of a vibrating screen.
The working principle of a vibratory screen is quite simple, which makes it easy to operate. The crucial parts of the machine include vibrating screens, exciter, motor, screen decks, liners, and side plates.
Vibrating source comes from an exciter that transmits vibration to the screen deck by the V-belt, which makes material shaking and distributing evenly on the screen. During the process, the large size of material will stay on the top while the small and fine size material can go throughout the screen mesh to the bottom, then youll get different sizes of materials.
The vibration of screen is generated by an exciter which consists of housing, bearing, shaft and an eccentric mass. In-deep speaking, the motor passing the driving force to exciter by V-belt, and then eccentric mass rotating around the exciter shaft to create vibration.
The screening and frequency can be adjusted by changing the ratio of the V-belt sheaves. The high-quality exciter can performance a force output of 1000 KN, keeping excellent operational performance and economic efficiency.
The task of the balance wheel is to ensure centrifugal forces evenly distributing around the axis of rotation, otherwise, the unbalanced cause the pulley to vibrate thus leading to premature or even catastrophic failure.
An inclined vibrating screen is one of the most popular screening machines. The inclination of this type of screen is at the range of 15 to 30 degrees. Screening stroke can be adjusted by remove or add eccentric mass and is generally at 8mm to 12mm.
The inclined screen utilizes gravity to help material move downward. Besides, the circular motion also helps to separate coarse and fine material. This type of vibrating screen is often applied in stone crushing, sand making, ore processing, construction waste recycling, wet screening, and chemical fields.
The inclination angle of the horizontal vibrating screen is between 0 degrees and 5 degrees, almost parallel to the ground. It is equipped with a triple drive mechanism that combines advantages of linear and circular vibration types in elliptic vibration.
The triple drive mechanism can keep material moving horizontally under the help of linear vibration while avoid them plunging because of the circular vibration. A horizontal screen has a simple structure, reliable performance, and large capacity, and can overcome any condition. So, it is the most practical vibrating screen in the quarrying field.
The outstanding feature of a high-frequency screen is high frequency and low amplitude, which ensures a faster material speed thus greatly improving screening efficiency. It is perfect for screening feeds containing solid and crushed ores down to approximately 200m in size.
It is mostly used in dehydration wet screening in which a filtering layer on the screen surface can block the passage of fine material thus reducing the loss of solid materials in water and improving the recovery rate of solid. It is applied for screening and separating iron ore, tin ore, tungsten, tantalum, and niobium, etc.
Fote is one of the leading manufacturers of high-quality vibrating screens. It mainly produces circular motion vibrating screens/inclined vibrating screens, horizontal vibrating screens, high-frequency vibrating screens, drum screens. If you have any needs, please consult our experienced screen engineers to obtain solutions and other information and suggestions.
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As the equipment making circular trajectory, the vibrating screen is specially applied in the stone plant. It can also be used for screening the products in beneficiation, building material, electricity and chemistry industries. Its amplitude is adjusted by the eccentric and exciter. Quality spring is used as damping device so as to reduce the impact against vibrating screen.
The vibrating screen of Dingli is mainly in the industry of mining industry. It can be divided into YKS and YKZ two series. As a new efficient vibrating screen with multi layers, it can adjust the amplitude by changing the number of eccentric blocks. Our vibrating screen is featured by simple structure, strong exciting force, high efficiency, small noise, easy maintenance and operation.
YKS series is also called upper vibrating screen. With the vibrator installed in the upper place, it is generally used for screening three or less types of material in the small gravel production line with low price.
YKS series is also called middle vibrating screen. With the amplitude adjusted by the exciter of eccentric shaft and eccentric blocks, it generally screens five types of fine gravel. Featured by simple structure and high efficiency, it is especially favored by large gravel production lines.
By conveying the crushed material to the sieve through the belt, the circular vibrating screen is applied for fine screening dry and wet material with the features of high efficiency, steady operation and low noise.
Driven by the motor through the universal joint or tire coupling, the main shaft of YKS vibrating screen rotates at a high speed. With the rotation of main shaft, the vibration box with eccentric block generates a centrifugal inertia force so that the screen box which can vibrate freely will produce the vibration of approximate circular track, completing the screening operation.
YKZ circular vibrating screen generates vibration with the single motor driving the two sets of exciters inlaid the frame to rotate through a flexible coupling. The screen frame is made through riveting of the side plate, channel steel, round tube beam and doubler plate. With the screen surface making round vibration, the aggregates on the sieve constantly reverse and loose. In the process of production, the amplitude can be easily controlled by adjusting the number of eccentric blocks of exciter.
Circular vibrating screen has a single axis. Screen box and screen surface produce a circular trajectory under the action of vibrator. With vibration of the screen surface, the material is loosened and flung away. The fine particles thus move to the lower part of the material layer and are discharged through the sieve. Driven by the motor through the universal joint or tire coupling, the main shaft rotates at a high speed. The vibrating box with eccentric block is mounted on the main shaft and rotates with the spindle to produce the centrifugal inertia force. The screen box is forced to make continuous circular movement while the aggregates are continuously thrown with the screen box on the inclined screen surface. With continuous flip and loose, the aggregates stuck in the sieve jump out to prevent the sieve plug. Such cycles of granularity complete the classification and screening process. Circular vibrating screen has double-amplitude adjustable within 4-7mm depending on the thickness of eccentric blocks.
In 2014, we also configured a 1500t/h large stone production line for the customer in Huaibei, Anhui. In order to meet the local needs of huge amount of sand and gravel, we adopt 9 sets of 3YKZ3070 circular vibrating screen which are divided into three groups for screening materials.
In 2014, we configured a 1000t/h large stone production line for the customer in Xingyang, Henan. The selected equipment includes PCZ-1615 heavy hammer crusher, vibrating feeder, 3YKZ3070 vibrating screen *2, 2YKZ3070 *2, conveyor belt, deduster and other ancillary equipment. The highlight of such production line lies in the side-by-side screening of two screens, which could not only increase the output but also screen the aggregates more accurately.
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