Alumina powder ultrasonic vibrating sieve

A major advantage of the alumina powder ultrasonic vibrating sieve is its high-precision, low-loss screening method. Alumina powder particles are fine and prone to static electricity and agglomeration. Ordinary vibrating sieves often have problems such as blocking the mesh and low screening efficiency when screening at high mesh numbers. In contrast, the ultrasonic vibrating sieve superimposes high-frequency ultrasonic vibration on the sieve to produce a slight high-frequency vibration state on the sieve surface, effectively breaking up powder agglomerations, reducing the adsorption force between particles, and increasing the passing rate. 

This screening method not only maintains the particle integrity of the material, but also significantly improves the screening accuracy. It is particularly suitable for ultrafine powder classification above 400 meshes, and is an ideal equipment for the screening process of fine materials such as alumina powder.

What are the advantages of ultrasonic vibrating sieve for alumina powder?

The mesh of ultrasonic vibrating sieve for alumina powder can reach 800 mesh, which can meet most of the screening requirements of alumina powder, such as 60 mesh, 100 mesh, 140 mesh, 150 mesh, 200 mesh, 325 mesh, etc. The high-frequency electric energy of 38KHZ can break up the pseudo-agglomeration of alumina powder. The ultrasonic system can also keep the alumina powder in a low-altitude suspension state, play a role in clearing the net, and effectively solve the problem of blocking the mesh caused by agglomeration, static electricity, strong adsorption, etc.

During the screening process, it will not affect the physical and chemical properties of alumina powder, ensuring that the original properties of the material remain unchanged. Using ultrasonic frequency to vibrate the sieve, the alumina powder can quickly pass through the sieve, and the screening output can reach 2-5 times that of ordinary vibrating sieves, and the screening accuracy can reach more than 95%.

Working principle of alumina ultrasonic vibrating sieve

Ultrasonic system: An ultrasonic transducer is installed under the sieve to convert electrical energy into high-frequency mechanical vibration (usually 36kHz). High-frequency vibration is directly transmitted to the surface of the sieve, causing the sieve to produce ultra-high frequency oscillation at the micron level.

Vibrating sieve body: The sieve machine itself still retains the three-dimensional vibration motor of the ordinary vibrating sieve (providing material throwing motion), superimposed with ultrasonic high-frequency vibration.

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What can ultrasonic vibrating sieves be used for in the field of alumina powder

Abrasive industry: Screening corundum-type alumina abrasives (such as brown corundum and white corundum) to obtain 100-325 mesh uniformly sized abrasive powder for grinding wheel and sandpaper manufacturing.

Ceramic raw materials: Screening high-purity alumina powder (more than 99.9%) to 600 meshes to ensure uniform density during sintering of ceramic green bodies and reduce cracking.

Electronic packaging: Precision screening of nano alumina powder (particle size <1μm) for filling epoxy resin to prepare thermal conductive adhesive requires a narrow particle size distribution (error ≤5%), and ultrasonic vibrating sieves can meet high-precision requirements.

Why use ultrasonic vibrating sieves to screen alumina powder?

Alumina powder is a white powder with high hardness ceramic raw materials. It has fine particles, high specific gravity, and a certain amount of static electricity. The common particle size range is between 200 mesh and 800 mesh. Because its particles are fine and sticky, ordinary vibrating sieves are prone to problems such as sticking to the mesh, blocking the mesh, low screening efficiency, difficulty in fine powder passing through the mesh, and static electricity causing the material to adhere to the mesh. Therefore, the use of ultrasonic vibrating sieves has become a common way to sieve alumina powder.

Alumina powder ultrasonic vibrating sieve has significant advantages in processing fine-grained powders, and is especially suitable for high-precision screening requirements between 200 mesh and 800 mesh. It combines the advantages of traditional rotary vibrating sieve and ultrasonic system, and solves the problems of easy blockage and low screening efficiency in alumina powder screening.