Vibrating screens play a crucial role in industries such as mining, aggregate processing, and material classification by efficiently separating materials of different sizes. However, screen blockage is a common issue that reduces screening efficiency, increases downtime, and raises maintenance costs.

Blockage occurs when materials such as wet, sticky, or irregularly shaped particles adhere to the screen mesh, clogging openings and restricting material flow. Factors such as moisture content, screen design, and improper vibration settings contribute to this problem.

Vibrating screen blockage prevention method

Vibration screen blockage is a common issue that reduces efficiency and throughput. Here’s a breakdown of methods to prevent it, categorized by approach:

1. Material Preparation & Handling:

Screening Beforehand: If possible, pre-screen the material with a coarser screen to remove oversized particles or debris that might cause blockage in the main screen.

Proper Material Drying: Excessive moisture is a primary culprit for blockage, especially with fine materials. Dry the material thoroughly before screening. Methods include:

Air Drying: Spreading the material thinly and allowing air circulation.

Oven Drying: Controlled temperature drying in an oven.

Fluid Bed Drying: Efficient for particulate materials, using heated air to fluidize and dry the particles.

Infrared Drying: Uses infrared radiation to heat and dry the material.

Material Conditioning: Introduce additives to the material to improve its flow characteristics. Examples include:

Anti-caking agents: Prevent agglomeration of particles.

Flow enhancers: Reduce friction and improve material movement.

Consistent Material Feed Rate: Avoid surges of material onto the screen. A consistent, controlled feed rate allows the screen to process the material effectively. Use feeders like:

Vibratory Feeders: Provides even and adjustable material flow.

Screw Feeders: Good for controlled metering of powders and granules.

Belt Feeders: Suitable for handling a wide range of materials.

2. Screen Design & Selection:

Appropriate Mesh Size: Choose a mesh size that’s suitable for the particle size distribution of your material. Too small a mesh increases the risk of blinding (where particles get lodged in the openings).

Screen Material: Select a screen material that resists wear, corrosion, and abrasion from the material being screened. Common materials include:

Stainless Steel: Durable and resistant to corrosion.

High Carbon Steel: Strong and wear-resistant, but prone to rust.

Polyurethane: Abrasion-resistant and flexible.

Nylon: Good for handling abrasive materials and materials that tend to stick.

Screen Type: Different screen types are better suited for different materials and applications:

Woven Wire Mesh: Common and versatile, but can be prone to blinding.

Perforated Plate: Stronger and less prone to blinding than woven wire mesh, but less efficient for separating fine particles.

Polyurethane Screens: Excellent abrasion resistance and self-cleaning properties. Can be molded into complex shapes for specialized applications.

Wedgewire Screens: Provides a high open area and reduces blinding. Good for handling wet or sticky materials.

Anti-Blinding Screen Designs:

Bouncing Balls/Rings: Small balls or rings placed under the screen that bounce and strike the screen mesh, dislodging particles.

Ultrasonic Vibration: Imparts high-frequency vibrations to the screen mesh, preventing particles from sticking.

Air Knives/Air Blasters: Use compressed air to blow away particles from the screen surface.

Flexible Fingers/Tines: Flexible elements that continuously agitate the screen mesh.

3. Vibration Screen Operation & Maintenance:

Proper Tensioning: Ensure the screen is properly tensioned. Loose screens vibrate excessively and can lead to blinding. Overly tight screens can be damaged.

Optimal Vibration Frequency & Amplitude: Adjust the vibration frequency and amplitude to suit the material being screened.

Higher Frequency: Better for fine particles.

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For more detailed information on how to prevent vibrating screen blockage, please click here: https://www.hsd-industry.com/news/vibrating-screen-blockage-prevention-method/

A linear vibrating screen is a screening machine that uses vibration to separate materials based on size. It operates using a linear motion, which is generated by two counter-rotating vibratory motors or exciters. These vibrations cause the material to move forward while allowing smaller particles to pass through the screen mesh, effectively sorting and classifying materials. The technical parameters of a linear vibrating screen can be quite extensive, depending on the manufacturer and specific application.

Linear vibrating screen technical parameters

1. Mechanical and Dimensional Parameters:

Screen Size (Length x Width): This is the active screening area, often in meters (m) or millimeters (mm). It’s crucial for determining the throughput capacity of the screen. e.g., 1.5m x 3m, 2m x 4m.

Overall Dimensions (Length x Width x Height): Total physical size of the machine, including the frame, motor, and other components. Important for space planning.

Weight: The total weight of the machine in kilograms (kg) or metric tons (t). Relevant for transportation and installation considerations.

Number of Decks: How many screening surfaces are stacked on top of each other. Single-deck screens perform a single separation, while multi-deck screens can perform multiple separations in one pass.

Deck Inclination Angle: The angle of the screen deck relative to the horizontal. This influences material flow rate and screening efficiency. Typically a small angle (e.g., 5-10 degrees).

Mesh Size (Aperture Size): The size of the openings in the screen mesh, in millimeters (mm) or micrometers (µm). Determines the cut size (separation size). Each deck in a multi-deck screen will have a different mesh size.

Mesh Material: The material used for the screen mesh, such as stainless steel (common grades: 304, 316), woven wire cloth, perforated plate, polyurethane, or rubber. The choice depends on the material being screened and the required durability.

Frame Material: The material used for the screen frame, typically carbon steel (with coating for corrosion resistance) or stainless steel.

Screening Area (Total): The total active area of all screening decks combined.

2. Vibration Parameters:

Vibration Frequency: The number of vibration cycles per second, measured in Hertz (Hz) or cycles per minute (CPM). Frequency affects the material’s agitation and movement on the screen.

Vibration Amplitude (Stroke): The distance the screen deck moves during each vibration cycle, in millimeters (mm). Amplitude influences the material’s throw and the screening rate. Often adjustable.

Excitation Force: The force generated by the vibratory motor to drive the screen, measured in Newtons (N) or kilonewtons (kN). It’s related to the motor’s power and the eccentric weight.

Vibration Direction: The direction of the vibratory motion, which is typically linear (straight line) for linear vibrating screens. The angle of the linear motion relative to the screen surface can be a factor.

Vibrator Type: The type of exciter used to generate the vibrations. Common types include:

Vibratory Motors (Unbalanced Motors): Two motors with eccentric weights rotating in opposite directions. This is the most common type.

Electromagnetic Vibrators: Used for smaller screens.

Mechanical Vibrators: Driven by belts and pulleys.

3. Operational and Performance Parameters:

Capacity/Throughput: The amount of material the screen can process per unit of time, typically measured in metric tons per hour (t/h) or kilograms per hour ( kg/h ). Capacity is heavily dependent on the material being screened, its particle size distribution, and the screen parameters.

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For more detailed information on the technical parameters of the vibrating screen, please click here: https://www.hsd-industry.com/news/linear-vibrating-screen-technical-parameters/

The purchase of double beds in schools needs to take into account safety, practicality, durability and space optimization. Any carelessness may cause safety hazards or management problems. This article sorts out the key points from the three aspects of safety, functionality and durability to help schools make scientific selections for how to choose a suitable double bed for school.

How to choose a suitable double bed for school:

1. Safety:

Structural stability: the core parameters that must be met first: static load of the bed ≥2000N (upper bunk) +1500N (guardrail), guardrail height ≥300mm, gap ≤75mm (anti-fall clamp), step depth ≥80mm, step rod diameter ≥20mm (anti-slip design).

Material safety: the steel thickness of metal parts must be ≥1.2mm, and wooden parts must meet the following requirements: formaldehyde emission ≤0.124mg/m³ (E1 grade standard), solid wood moisture content 8%-12% (anti-cracking and deformation).

Protective design: the R angle of the bed corner is ≥5mm to prevent students from being injured due to accidental bumps. An anti-slip baffle (height ≥50mm) is set on the edge of the upper bunk to prevent students from falling from the upper bunk. The angle between the ladder and the bed is 75°±5°, which is convenient for students to get on and off the bed.

2. Functionality:

Space optimization plan: adopt a combined structure: the bed, desk and cabinet are integrated, saving 30% of space. Adopt a telescopic design: the lower bunk can be folded into a study area.

Storage function upgrade: the drawer under the bed can be equipped with a self-locking function, the side pendant can bear a load of ≥15kg, meeting the needs of students hanging schoolbags, etc., and the depth of the bedside shelf is ≤200mm to prevent students from colliding.

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More detailed information about the how to choose a suitable double bed for school can be found by visiting:https://www.aoyangschoolfurniture.com/a/news/how-to-choose-a-suitable-double-bed-for-school.html

In the transformation and upgrading of modern agriculture, steel structures are reshaping the form of agricultural buildings with their high strength, modularity and sustainability. From smart greenhouses to 10,000-ton granaries, from intensive farms to agricultural product processing centers, steel structures have become the preferred solution for modern agricultural infrastructure. This article will deeply analyze the core advantages of agricultural steel structures, analyze the benefits of steel structures to agriculture, and attach specific scenarios.

Benefits of steel structures for agriculture:

1. Super strong bearing capacity:

Agricultural steel structures rely on their wind pressure resistance level: can withstand 12-level typhoons, snow load resistance: the slope roof design can bear 1.5m of snow, and seismic performance: the flexible node design can meet 8-degree seismic fortification. These three technical characteristics enable it to cope with the challenges of extreme environments.

2. Fast assembly:

Compared with the time-consuming traditional brick-concrete construction, the steel structure construction takes only half the time, which greatly optimizes the construction process. Shortened the construction period by 50%.

3. Innovation in space utilization:

Steel structures can achieve large-span column-free space, with a single span of up to 60 meters, meeting the needs of mechanized operations. And it is suitable for lightweight rock wool sandwich panels (thickness 50-150mm) to achieve rapid zoning, adapt to crop rotation and multi-species mixed breeding. It breaks through the limitations of traditional agriculture.

4. Significant cost reduction:

In terms of material cost, the steel structure solution saves about 15.5% of the cost compared with the concrete solution. From the perspective of construction cost, it saves about 52% of the cost. While the annual maintenance cost is greatly reduced, the steel structure also far exceeds the concrete in terms of service life. Thus, the purpose of reducing costs from multiple angles is achieved.

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More detailed information about the steel structures to agriculture can be found by visiting:https://www.meichensteel.com/a/news/benefits-of-steel-structures-for-agriculture.html

Flat and bent glass tempering furnace is the core equipment for producing building curved curtain walls and automotive curved glass. Its installation accuracy directly affects the yield rate and equipment life. This article provides the installation process of flat and curved glass tempering furnace, covering the entire process of foundation construction, mechanical positioning, and electrical debugging, helping you avoid 90% of installation risks.

Installation process of flat and bent glass tempering furnace：

1. Preparation before installation:

Site foundation construction: concrete bearing grade must be ≥5 tons/m² (including equipment weight + glass load), thickness: ≥400mm. 1.5m maintenance space is reserved at the top of the furnace body, and the ambient temperature must be controlled at 15-35℃ (to avoid thermal expansion and contraction causing structural deformation).

2. Mechanical installation steps:

Furnace body and wind grille positioning: use a 20-ton crane, and the hanging point must be at the location of the equipment reinforcement ribs. Pay attention to the application of high-temperature resistant sealant at the flange interface when splicing the segmented furnace body. Use a laser level to monitor the entire process during positioning, the longitudinal level is ≤0.5mm/m, and after the roller is installed, use a feeler gauge to check the parallelism between the rollers.

Installation of ceramic roller system: clean the bearing seat first, apply molybdenum disulfide high-temperature grease, and then install the ceramic rollers one by one. The bearing clearance at both ends is controlled at 0.05-0.1mm, and the centering deviation of the drive motor coupling is ≤0.05mm. After the installation is completed, the transmission test is carried out. Under no-load operation for 2 hours, the radial runout of the roller is ≤0.15mm.

Cooling wind grid debugging: the angle between the wind nozzle and the glass surface is 35°-50°, and the angle gauge is used for precise positioning, and the wind pressure is balanced to ensure that the upper and lower wind pressure difference is ≤5%.

3. Electrical and program debugging:

Power supply system configuration: the power supply must meet the three-phase 380V±5%, and the independent grounding resistance is ≤4Ω, and the cable cross-sectional area is ≥120mm².

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More detailed information about the installation process of flat and bent glass tempering furnace can be found by visiting:https://www.shencglass.com/en/a/news/installation-process-of-flat-and-bent-glass-tempering-furnace.html