In mining production, mining vibrating screen is a crucial equipment, its role is to screen the ore, separating the ore of different particle sizes to meet the requirements of the subsequent production process. However, in the face of the many mining vibrating screen models and brands on the market, how to choose a suitable equipment has become a problem faced by many mining enterprises. Below, we will discuss how to choose the right mining vibrating screen from several key aspects.
一. Understand their own needs
Before choosing a mining vibrating screen, first of all, it is necessary to clarify your production needs. This includes the type of ore to be processed, processing capacity, screening size requirements and so on. Different ore properties and production requirements have different requirements for the performance and structure of the vibrating screen.
Understand the particle size distribution of the ore
First of all, the ore to be processed needs to be analysed for particle size, to understand the particle size distribution of the ore. This includes determining the maximum particle size, minimum particle size and the proportion of different particle size intervals. Through the particle size analysis, the target particle size range of the required screening can be clarified, providing a basis for selecting the appropriate vibrating screen.
Consider the screening accuracy of vibrating screen
1.For the case of high-precision screening, that is, when the ore needs to be separated in strict accordance with the specific particle size range, the vibrating screen with high screening accuracy can be selected. For example, linear vibrating screen usually has good precision performance in fine particle size screening, which can effectively separate the ore particles close to the target size accurately.
2.If the requirements for screening accuracy are not so strict, but pay more attention to the processing capacity and efficiency, you can choose the type of vibrating screen with relatively low screening accuracy but large processing capacity, such as circular vibrating screen.
Determine the screen specification of vibrating screen
1.Coarse grain size ore: for processing larger grain size ore, such as ore with a grain size of more than tens of millimetres, the screen mesh with a larger aperture should be selected. Generally speaking, you can choose woven wire mesh or perforated steel mesh and other high strength screen type, to ensure that it can withstand the impact of larger ore particles.
2.Medium size ore: for medium size ore, the screen mesh aperture can be selected according to the specific size requirements. Consider using polyurethane screen mesh and other screen mesh with good wear resistance and elasticity, which can ensure a certain screening efficiency, but also extend the service life of the screen mesh.
3.Fine-grained ores: For the screening of fine-grained ores, it is necessary to choose a screen with a smaller aperture. Commonly, there are metal wire mesh, nylon mesh and so on. At the same time, in order to prevent fine particles from blocking the screen holes, you can choose a screen with self-cleaning function or use high frequency vibration and other ways to improve the screening effect.
Consider the number of layers of vibrating screen
1.Single particle size requirements: if you only need to separate the ore into two particle size ranges, such as greater than a specific size and smaller than the size of the two parts, you can choose a single layer vibrating screen.
2.Multiple particle size requirements: if you need to separate the ore into a number of different particle size range of products, you need to choose multi-layer vibrating screen. According to different particle size requirements to determine the number of layers of vibrating screen, the aperture of each layer of screen mesh decreases in turn, so as to achieve the multi-level screening of the ore.
Combined with the production requirements and economic benefits
In the selection of vibrating screen, not only to consider the requirements of the ore particle size, but also to combine the actual needs of production and economic benefits. For example, although the high-precision vibrating screen may be able to better meet the particle size requirements, but if its price is too high, the maintenance cost is large, and the enhancement of production efficiency is not significant, then you need to comprehensively consider whether to choose other more economical and practical programme. At the same time, it is also necessary to consider whether the processing capacity of the vibrating screen can meet the needs of the production line to ensure that the entire production process is carried out smoothly.
二.Consider the type of vibrating screen
There are various types of mining vibrating screen, the common ones are circular vibrating screen, linear vibrating screen, banana style screens screen and so on. Each type of vibrating screen has its characteristics and scope of application.The following is a brief introduction to several kinds of vibrating screen to facilitate your reference.
Advantages of banana style screens
The screen surface of the banana style screens is in the shape of a banana curve, with a larger angle at the inlet end and a smaller angle at the outlet end. This design makes the material in the feed end can be quickly loose and stratified, fine particles can quickly through the screen, while the coarse particles are gradually to the discharge end of the movement. In the whole screening process, the material stays on the screen surface for a long time, which increases the chance of screening and thus improves the screening efficiency. Banana sieve also adopts the design of large amplitude, large vibration intensity and low vibration frequency, which can make the materials on the screen surface quickly stratify and move forward, thus greatly improving the processing capacity. Whether it is different types of materials such as coal, ore, sand and gravel, or materials with high humidity and viscosity, banana style screens can be better adapted. For some materials that are difficult to screen, such as wet coal, the large amplitude and special screen surface design of banana style screens can effectively overcome the adhesion of the material and ensure the smooth screening.
Advantages of circular vibrating screen
Its trajectory is circular, the material in the sieve surface constantly do tumbling, throwing movement, can fully contact with the screen, increase the smaller than the size of the particles through the sieve, thus improving the screening accuracy and efficiency.
Unique screen structure and vibration parameter design makes the distribution of materials on the screen surface more uniform, avoiding the accumulation of materials and the phenomenon of blocking the screen holes, which further ensures the high efficiency of screening.It can be applied to many different types of materials, including ores, coal, sand and gravel, chemical raw materials, foodstuffs, etc. It can effectively screen materials with different particle size, different humidity and different density. It can meet the production needs of different industries, such as mining, building materials, chemical, food, pharmaceutical and other industries.
Advantages of linear vibrating screen
Materials in the linear vibrating screen along the linear direction of reciprocating motion, this movement makes the material can quickly spread out on the screen surface, increasing the contact opportunity between the material and the screen surface, thus improving the screening efficiency. It can also choose the appropriate screen aperture and number of layers according to different material characteristics and screening requirements. Through precise design and adjustment, the linear vibrating screen can achieve high precision screening of materials and accurately separate materials of different particle sizes. It has a large screen surface area: linear vibrating screen usually has a large screen surface area, which makes it able to process a large amount of materials at the same time. In the same time, linear vibrating screen can screen more materials, which improves the production efficiency. And the vibration direction of linear vibrating screen is the same as the conveying direction of materials, this design is conducive to the rapid conveying and screening of materials. The movement speed of the material on the screen surface is faster, which reduces the residence time of the material on the screen surface, thus increasing the handling capacity.
Linear vibrating screen is suitable for different types of materials, including granular, powder, block and so on. Whether it is dry materials or materials containing a certain amount of moisture, linear vibrating screen is able to carry out effective screening, but also able to adapt to different working environments, such as high temperature, high humidity, dusty, etc. It has good sealing and protection performance, which can effectively prevent the material leakage and the entry of external impurities. It has good sealing and protection performance, which can effectively prevent material leakage and the entry of external impurities, ensuring the quality of screening and normal operation of the equipment.
三. Pay attention to the performance parameters of the vibrating screen
The performance parameters of the vibrating screen directly affect its screening effect and production capacity. When choosing mining vibrating screen, it should focus on the following performance parameters:
1.Screening efficiency: screening efficiency is an important index to measure the screening effect of vibrating screen, which directly affects the recovery rate of ore and product quality. Generally speaking, the higher the screening efficiency, the better, but in the actual selection, it should be based on the production requirements and economic costs for comprehensive consideration.
2.Processing capacity: processing capacity refers to the amount of ore that can be processed by the vibrating screen in a unit of time, and it is an important index to measure the production capacity of the vibrating screen. When choosing vibrating screen, the appropriate equipment should be selected according to the design capacity of the production line to ensure that the equipment can meet the production requirements, while avoiding overloaded operation of the equipment.
3.Screening size: the screening size refers to the smallest ore size that can be separated by the vibrating screen, which is determined according to the requirements of the subsequent production process. When choosing the vibrating screen, we should ensure that its screening size can meet the production requirements, and at the same time, we should pay attention to the stability and uniformity of the screening size.
In summary, choosing a suitable mining vibrating screen requires comprehensive consideration of their own needs, the type of vibrating screen, performance parameters, quality and reliability and other factors. Only on the basis of a comprehensive understanding and mastery of this information, can we choose a mining vibrating screen with excellent performance, reliable quality and suitable for our own production needs, and provide a strong guarantee for the smooth progress of mining production.
