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Mining Vibrating Screen

Mining vibrating screen refers to the mechanical devices used for the screening of various materials in a variety of mine production projects.

Capacity: 70-500t/h
Feed size: ≤150mm

Product Introduction

Description

Mining vibrating screen is the equipment mainly used for screening aggregates in the metallurgy, coal, electricity, building materials, electricity and other industries. The aggregates are screened with the screen box moving out of the vibration of exciter. With the advantages of adjustable amplitude, multi-layer screening and high screening efficiency, the vibrating screen is applied for heavy, medium and fine screening. It is also ideal screening equipment for primary crushing, secondary crushing and finished materials.

Operation Principle

According to the applicable industry and the types of aggregates, the mining vibrating screen can be divided into YKS round vibrating screen, YKZ round vibrating screen, linear vibrating screen and banana screen, etc. The vibrating screen has different types, but its main components and operation principle is the same. It is mainly composed of the motor, exciter, screen plate, sieve, shock damping spring and other spare parts. During the operation, the screen box and surface vibrate under the force of vibrator. The aggregates on the screen surface are loosened and tossed up due to vibration of the surface. The fine-grained material has the opportunity to move to the lower part of the material layer and be screened out through the mesh to complete the process of screening.

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Introduction of Common Types of Mining Vibrating Screen

YKS circular vibrating screen

Since the exciter is placed in the upper part of the vibrating screen, YKS circular vibrating screen is also called upper vibrating screen. It is specialized in the mining production. The screening process is completed with the exciter driving the screen surface to move in a circular trajectory. Specially designed for screening the stone in quarry, it has lots of advantages with simple structure, easy maintenance and low power consumption for aggregates screening compared with the middle vibrating screen. As for the appearance comparison with YKZ vibrating screen, we can see the exciter of YKS circular is installed on the upper location of vibrating screen.

YKZ circular vibrating screen

YKZ circular vibrating screen equipment is also known as middle vibrating screen with its exciter being placed in the middle of the vibrating screen. It is designed especially for screening the stone in quarry. Its operation principle is almost as the same as that of YKS vibrating screen with making movement in a circular trajectory. However, it has some different features compared with YKS vibrating screen; for example, YKZ circular vibrating screen adopts riveted structure without welding stress. It also has the characteristics of long use life, high capacity, high screening quality and screening efficiency. From the outside appearance, it can be seen that the exciter is installed in the middle of the vibrating screen, which is distinguished from the upper vibrating screen.

 

Linear vibrating screen

Linear vibrating screen is common material screening equipment in the mining production with dual-vibration motor as vibration source. Under the action of exciting force of vibration motor, the screen body is forced to drive the sieve to make a linear trajectory with the aggregates on the surface are cyclically tossed up forward for screening. It is widely used for wet & dry classification and dehydration of medium and fine aggregates in coal, metallurgy, light industry and other industries. Compared to the circular vibrating screen, the device can carry out finer screening of dry powder or granular materials.

Banana screen

Banana screen is a large and medium-sized screening machine with large screening capacity. It is mainly composed of screen box, screen, exciter, damping spring and lower seat frame. As for the operation principle, the exciter, serving as vibration source, drives the screen box to move in the approximate elliptical trajectory, meanwhile, with relatively large angle of screen surface, the aggregates on the sieve move quickly forward and loose for completing the screening process. It is suitable for screening sinter ore, coal, limestone, broken stone, gravel, metal or nonmetallic ore and other materials. It is widely used in metallurgy, coal, building materials, refractory materials and other industries.

 

Precautions for Purchasing Vibrating Screen

  1. The types of aggregates for screening. The vibrating screen with various types are applied to screen different aggregates including limestone finished material, bluestone finished material, mine finished material, etc.. The corresponding vibrating screen is selected to meet the needs of different materials.
  2. The fineness of aggregates for screening. Different aggregates have various particle sizes. The corresponding vibrating screen with proper screen mesh shall be selected based on the particle size of aggregate in order to meet the requirements of screening while avoiding the phenomenon of material clogging or loss of material.
  3. Through site visit of the project, the type and number of vibrating screen shall be determined according to the field production circumstance. Before the selection of equipment, the site survey shall be conducted. For example, in some small-scale production projects, only a screen is needed for screening the aggregates, so there is no need to waste extra equipment.

Operation Principle and Spare Parts of Mining Vibrating Screen

The main components of mining vibrating screen include motor, exciter, screen plate, sieve, damping spring and other spare parts. With China’s increasing emphasis on environmental protection, a variety of dust-proof devices will also be equipped to reduce the dust generated in the screening.

The general production process is as follows: with the exciter vibrating under the driving of motor, the aggregates on the sieve starts to vibrate for being conveyed to the next-level production equipment or the silo. According to the particle size of finished material, the corresponding mesh is selected for screening out the aggregates. The sieves with different sizes are needed to meet the requirements of the project scale.

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Advantages

  1. The mining vibrating screen manufactured by Dingli is very professional with quite clear target, especially for production in the gravel plant. The aggregates with different particle sizes can be screened out by Dingli’s screening equipment. Currently our vibrating screen has been applied in nearly 1000 production sites and obtained unanimous praise from the customers.
  2. Airtightness and noise reduction are very outstanding. Due to installation of various closed devices on the vibrating screen equipment, it can greatly reduce dust pollution in the production. The rubber and other devices are added in the inlet and screen plate so as to greatly reduce noise pollution in the production.
  3. With long use life, high screening efficiency and easy maintenance, our company's vibrating screen equipment uses high-quality materials and advanced production technology. Coupled with the correct operation and regular maintenance, the equipment can be used for a long time with high screening efficiency. The finished aggregates can be screened into different silos based on its particle size. Due to simple and reasonable structure, it can be very convenient for maintenance. In some small-scale production projects, only one person will be able to complete the overall maintenance work.

Precautions for Installation and Maintenance

Installation Precautions

  1. Before installation, firstly build the cement base of the screen, and then install the vibrating screen frame. In case the cement base is not levelled, the equipment can not operate smoothly. The non-stable will cause damage to the equipment and prevent the smooth production.
  2. The small parts should also be carefully examined, such as the small bolts and other accessories on the vibrating screen equipment, if the spare parts loose, the equipment will not be able to start normal production.
  3. The installation of dangerous parts, such as motor and v-belt should be guided by the professional staff and try to avoid casual installation on your own.

Maintenance Precautions

  1. In case the vibrating screen vibration frequency is too slow or too fast, the eccentric block should be adjusted to ensure that the amplitude of the vibrating screen vibrate at a vibration frequency. By adding or reducing the number of eccentric block, the corresponding excitation force can be changed.
  2. If the bearing temperature is found too high, immediately stop the machine to carry out inspection or lubrication, so as to avoid the bearing fracture, which will cause certain economic losses to the producer.
  3. Always check the bolts and electrical equipment. If the electrical equipment is damaged, it must be replaced in time. If the bolt is loose, it must be tightened in time so as to avoid the interruption of production.
  4. Regular maintain the rubber spring, which can greatly reduce the damage caused out of the vibration of vibrating screen and improve the use life of equipment.
 

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