Glass powder, a key auxiliary material in many industries, demands extremely high particle size uniformity. Traditional vibrating screens, due to glass powder's tendency to agglomerate, poor flowability, and the adsorption of ultrafine powders, suffer from low precision, screen clogging, and ultrafine powder loss. Centrifugal Screens, leveraging the principles of "air flow dynamics + fine screening," can address these challenges, providing a stable, efficient, and high-precision classification solution.
Coreal Machinery has compiled some information for your reference.
I. Characteristics of Glass Powder
1. Fine Particles: The target particle size is typically a few to tens of microns.
2. Agglomeration: Fine particles have high surface energy and are easily adsorbed and aggregated into pseudo-large particles.
3. High Requirements: The product particle size distribution (PSD) must be narrow; excessive coarse particles or fine powders can affect product performance.
4. Limitations of Traditional Screening: Vibrating screens and rotary vibrating screens use mechanical force and wire mesh, which can easily clog, reduce efficiency, and introduce impurities or alter particle morphology.
II. Advantages of the Centrifugal Screen for Glass Powder Classification
1. Extremely high classification accuracy, meeting narrow classification requirements: Particle size error ≤ ±1%, accurately classifying 100-1200 mesh glass powder with a span value ≤ 1.2. Two or three layers of screens can simultaneously classify into three particle size grades, improving efficiency.
2. No screen clogging, stable classification efficiency: Airflow flushes the screen, and an ultrasonic screen cleaning system (20-40kHz) can be added, reducing clogging by over 95%, allowing for continuous operation for 8-12 hours. The screen is made of 316L stainless steel and reinforced with a lifespan of 6-8 months, making it 3-4 times more durable than traditional screens.
3. High ultrafine powder recovery rate, reducing raw material waste: The fully enclosed system with negative pressure secondary recovery achieves a recovery rate of ≥98%. No mechanical friction, metal impurities ≤ 5ppm, meeting high purity requirements.
4. Stable Operation, Suitable for Large-Scale Production: A PLC system controls feed rate (0.5-5 tons/hour) and air speed to accommodate material fluctuations. High-efficiency fans (15% lower energy consumption) are used, resulting in a noise level of ≤70dB and no need for complex vibration damping.
III. Precautions
To achieve optimal results, the following points should be considered:
1. Material Characteristics: Understand the original particle size, moisture content, and angle of repose of the glass powder in advance before selecting the model.
2. Screen Selection: Select the appropriate screen material (such as anti-static nylon) and mesh size based on the target particle size.
3. Parameter Optimization: Adjust and optimize feed rate, airflow pressure, and air volume during actual production to find the optimal operating point.
4. Back-end Collection System: High-efficiency cyclones and bag filters are essential for ensuring high yield and environmental compliance.
Coreal Machinery is committed to providing high-quality screening equipment and industry solutions.