As an efficient solid-liquid separation equipment, high-frequency dewatering screen is widely used in mining, environmental protection, construction and other industries. It achieves rapid dewatering of materials through high frequency vibration, which can effectively improve production efficiency and reduce energy consumption. However, there are many types of high frequency dewatering screen on the market, how to choose a high frequency dewatering screen suitable for their needs has become a problem faced by many users. In this article, we will discuss in detail how to choose the right high frequency dewatering screen from various angles to help you make a wise decision.
一.Define the requirements: determine the application scenarios and materials to be processed
Before choosing a high frequency dewatering screen, you first need to clarify your needs, including the application scene, the characteristics of the material to be processed and the expected processing effect. Different industries and materials have different requirements for high-frequency dewatering screen, so clear demand is the first step to choose the right equipment.
1.Application Scene
High frequency dewatering screen is widely used in the following scenes:
Mining industry: used for tailings dewatering, sand and gravel separation.
Environmental protection industry: used for sewage treatment, sludge dewatering, etc.
Construction industry: used in concrete mixing plant, sand and gravel production line.
Different application scenarios have different requirements on the processing capacity, durability and corrosion resistance of the equipment. For example, the mining industry usually needs to deal with a large amount of tailings, so it is necessary to choose equipment with large processing capacity and strong wear resistance; while the environmental protection industry requires equipment with good corrosion resistance to cope with the chemical substances in sewage and sludge.
2.Characteristics of the material to be processed
Material characteristics is the first choice of high-frequency dewatering sieve to consider the key factors, it is like a key, determines whether to find with the appropriate screen type, the dewatering effect plays a decisive role.
The particle size of the material is one of the important factors affecting the selection of screen type. For fine-grained minerals, such as particle size of less than 0.5mm materials, high frequency dewatering screen by virtue of its high-frequency vibration and smaller mesh aperture, can effectively separate the fine particles and water, to achieve high efficiency dewatering. In the mineral processing plant for concentrate dewatering treatment, if the concentrate contains a large number of fine-grained minerals, the choice of high-frequency dewatering screen can make the water content in the concentrate is greatly reduced to improve the quality and economic value of the concentrate. For materials with large particles, such as materials with particle size between 1 – 5mm, ordinary vibrating dewatering screen or linear dewatering screen may be more suitable, they can handle materials with large particles and have relatively large processing capacity.
Moisture is also an important characteristic of materials. Materials with high moisture content have poor fluidity and are prone to clogging the screen mesh, affecting the dewatering effect. For this kind of materials, it is necessary to choose high frequency dewatering screen with special design, such as adding built-in drenching device in the equipment, secondary flushing of the back half of the dewatering screen, in order to help the materials pass through the screen mesh smoothly, and get good dewatering effect. When dealing with wet coal slurry, due to the high water content and viscosity of coal slurry, it is difficult for ordinary dewatering screen to achieve the ideal dewatering effect, while the use of high frequency dewatering screen with secondary washing device can effectively solve this problem. On the contrary, for materials with low water content, ordinary high-frequency dewatering screen can meet the dewatering requirements.
The viscosity of the material should not be ignored. Higher viscosity materials, easy to adhere to the screen mesh, resulting in screen clogging, reducing the dehydration efficiency. For this situation, stainless steel sieve plate should be used, and with high frequency vibration, in order to reduce the adhesion of materials. When dealing with some viscous chemical raw materials, stainless steel screen plate can effectively resist the adhesion of materials, high frequency vibration can make the material on the screen mesh to move quickly, to avoid clogging the screen mesh, so as to ensure the normal operation of the dewatering sieve and dewatering effect.
Corrosive materials put forward special requirements for the material of the dewatering screen. If the material is corrosive, such as containing acidic or alkaline substances, then the screen mesh of the dewatering screen and the parts contacting the material should be made of corrosion-resistant materials, such as stainless steel, polyurethane and so on. In the chemical industry, the use of corrosion-resistant high-frequency dewatering screens is necessary to handle dewatering processes containing corrosive materials to ensure the service life of the equipment and the dewatering effect. Otherwise, the equipment may be corroded and damaged in a short time, which not only increases the cost of equipment maintenance, but also affects the normal production .
3.Expected processing effect
The expected processing effect includes dewatering rate, processing capacity, energy consumption and so on. Different equipment performs differently in these aspects, so it is necessary to choose according to the actual needs. For example, if the dewatering rate is higher, you can choose the equipment with higher vibration frequency; if the processing capacity is higher, you need to choose the equipment with larger screen surface area.
二.Equipment selection: key parameters and technical indicators
After clarifying the demand, the next step is to select the equipment according to the key parameters and technical indicators. The main parameters of high-frequency dewatering screen include processing capacity, screen aperture, vibration frequency, motor power and so on.
1.Processing capacity
Capacity refers to the amount of material that can be processed by the high frequency dewatering screen in a unit of time, usually in tonnes per hour (t/h) as a unit. The size of the processing capacity directly affects the production efficiency, so it is necessary to choose the appropriate processing capacity according to the actual production requirements. If the processing capacity is too small, it will lead to low production efficiency; if the processing capacity is too large, it may increase the cost of equipment and energy consumption.
2.Screen aperture
The size of the screen aperture determines the speed of the material through the screen and the dehydration effect. Too large aperture will lead to poor dewatering effect, while too small aperture is easy to cause screen clogging. Therefore, according to the particle size of the material to choose the appropriate screen aperture. Generally speaking, the screen mesh aperture should be slightly smaller than the average particle size of the material.
3.Vibration frequency
Vibration frequency is one of the core parameters of high-frequency dewatering sieve, which directly affects the dewatering effect. The higher the vibration frequency, the faster the dewatering speed of the material, but at the same time will also increase the energy consumption and wear and tear of the equipment. Therefore, according to the characteristics of the material and dehydration requirements to choose the appropriate vibration frequency. For the viscous material, you can choose a higher vibration frequency to improve the dehydration efficiency; while for the larger particle size materials, you can reduce the vibration frequency to reduce energy consumption.
4.Motor power
Motor power determines the vibration intensity and energy consumption of high frequency dewatering screen. Too little power will lead to insufficient vibration strength, affecting the dehydration effect; too much power will increase energy consumption and equipment costs. Therefore, it is necessary to choose the appropriate motor power according to the processing capacity and vibration frequency. Generally speaking, the larger the processing capacity, the higher the vibration frequency, the greater the required motor power.
5.Equipment material
The material of high-frequency dewatering screen directly affects the durability and corrosion resistance of the equipment. Common materials include carbon steel, stainless steel and wear-resistant alloy. Carbon steel material cost is lower, but the corrosion resistance is poor, suitable for processing non-corrosive materials; stainless steel material corrosion resistance is better, suitable for processing corrosive materials; wear-resistant alloy material has a high wear resistance, suitable for processing hardness of materials.
三.The cost and economic efficiency
Cost and economic efficiency are also important factors to consider when choosing high frequency dewatering screen. The cost of the equipment includes the purchase cost, installation cost, operation cost and maintenance cost. Users need to consider these costs comprehensively to evaluate the return on investment of the equipment.
1.Purchase cost
Purchase cost is the most intuitive cost factor when choosing high frequency dewatering screen. The price of different brands and models of equipment varies greatly, and users need to choose the right equipment according to the budget. It should be noted that the lower price of the equipment may be in the quality and performance deficiencies, so the choice can not only consider the price, but also need to consider the performance and quality of the equipment.
2.Running costs
Running costs include energy consumption, labour costs and so on. The energy consumption of high-frequency dewatering screen mainly comes from the motor, so the size of the motor power directly affects the running cost. Selecting equipment with lower energy consumption can effectively reduce the running cost. In addition, the equipment with higher degree of automation can reduce the labour cost and further improve the economic efficiency.
3.Maintenance costs
Maintenance costs include equipment maintenance, parts replacement and so on. Selecting equipment with strong durability and easy maintenance can reduce maintenance costs. In addition, choosing a supplier that provides perfect after-sales service can also reduce maintenance costs when equipment malfunctions.
4.Return on investment
Return on investment is an important index to evaluate the economic benefits of high frequency dewatering screen. Users can evaluate the ROI of the equipment by calculating the processing capacity, dewatering rate, energy consumption and other parameters, combined with the purchase cost and operating cost of the equipment. Selecting equipment with a high return on investment can effectively improve production efficiency and reduce operating costs.
Choosing the right high-frequency dewatering screen is an important decision that requires comprehensive consideration of many factors. From the in-depth analysis of the material characteristics, including particle size, humidity, viscosity and corrosiveness, to accurately consider the production scale, to determine the matching capacity; from a careful interpretation of the core parameters of the equipment, such as screen mesh aperture, vibration frequency and capacity, screen box structure, shaker type and screen surface material, each link is critical. We hope that this article can provide useful reference and guidance for enterprises in the selection of high-frequency dewatering screen.
