Ultrasonic test sieve for graphite screening

Wednesday June-25 2025  17:37:37

Graphite particles are easy to adsorb, agglomerate, have strong viscosity and high static electricity. These characteristics make ordinary vibrating screens very easy to be blocked during the screening process, resulting in low screening efficiency, difficult to ensure accuracy, and even unable to achieve effective screening. Ultrasonic test sieve for graphite screening can effectively destroy the static electricity, van der Waals force and agglomeration tendency between particles by superimposing high-frequency and micro-amplitude ultrasonic vibrations on the screen, so that the graphite particles remain in a micro-suspended state on the screen surface, thereby preventing blockage.

Scope of application

Graphite has fine particle size, easy agglomeration and strong conductivity. The use of ultrasonic test sieve for graphite screening can significantly improve the screening efficiency and accuracy. It is suitable for:

Particle size classification of spherical graphite, natural graphite and artificial graphite;

Precision screening of graphite powder in lithium battery negative electrode materials;

Screening of high-purity graphite powder, etc.

Advantages of ultrasonic test sieve in graphite screening

The ultrasonic test sieve for graphite screening can process graphite powder of 80-600 mesh (even up to 800 mesh), and the screening pass rate is more than 99.5%, meeting the high-precision requirements of lithium battery negative electrode materials. Graphite powder is easy to agglomerate, generate static electricity or adsorption. Ultrasonic high-frequency vibration (36,000 times per second) causes graphite powder to contact the screen in a more uniform state, which is conducive to the smooth passage of fine particles through the sieve holes. 

It is especially suitable for screening graphite powder of 300 mesh to 600 mesh. Compared with traditional test sieves, the screening pass rate of fine powder is increased by 30% to 80%, and the screening accuracy is more stable and reliable. Under the same screen surface area, the processing capacity of the ultrasonic screening machine can reach 2-10 times that of the ordinary vibrating screen.

Graphite powder has a flake structure, is light, easy to float, and easy to adsorb on the screen. At the same time, it has strong conductivity and is easy to generate static electricity, causing blockage of the screen holes and inaccurate grading. 

The ultrasonic test screen for graphite screening excites the screen microvibration through high-frequency micro-vibration (usually 18~38kHz), effectively solving the problems of powder agglomeration, adhesion, and blockage, and significantly improving the screening fluidity.

Technical specifications of ultrasonic test screen for graphite screening

Model	screen diameter	screen frame layer number	screen mesh range	ultrasonic frequency	applicable power supply	screen material	application characteristics
DH-200S	200mm	1~8 layers	20 mesh~500 mesh	33~38kHz	220V/50Hz	SUS304	laboratory standard type, suitable for fine graphite screening
DH-300S	300mm	1~6 layers	20 mesh~500 mesh	33~ 38kHz	220V/50Hz	SUS304	Batch sample screening, larger screen surface
DH-400S	400mm	1~5 layers	20 mesh~500 mesh	33~38kHz	220V/50Hz	SUS304	Pilot/industrial small batch screening

What can ultrasonic test sieves be used for graphite screening

Ultrasonic test sieves play an important role in graphite screening, especially for ultrafine graphite powder screening with strict particle size requirements. In the production process of lithium batteries, graphite powder with a specific particle size distribution is required to ensure the stability and consistency of battery performance. The ultrasonic test sieve for graphite screening can accurately control the particle size of graphite powder to avoid oversized or undersized particles affecting the overall performance of the battery.

Graphite is often used in the manufacture of various refractory materials due to its high temperature resistance. In these applications, the purity and particle size of graphite powder are critical to the quality of the final product. Graphite screening ultrasonic test sieve can effectively remove impurities, ensure the uniformity of graphite powder, and improve the quality of refractory materials. Graphite is used in the manufacture of a variety of conductive materials due to its good conductivity. Through ultrasonic screening technology, graphite powder that meets the requirements can be screened out to ensure that the performance of the conductive material meets the design requirements.

Typical application cases

A lithium battery negative electrode material company: Using a 200-mesh ultrasonic test sieve to screen artificial graphite, compared with the traditional rotary vibrating screen, the screening efficiency is increased from 40kg/h to 70kg/h, the particle size qualification rate is increased from 85% to 98%, and the plugging frequency is reduced from 3 times per hour to 1 time per week.

A graphene preparation company: Using a 500-mesh ultrasonic test sieve for graphite screening to classify graphene oxide powder, successfully screen out agglomerates, and obtain high-purity materials with D90<5μm to meet the needs of film preparation.

Ultrasonic test sieve for graphite screening is an ideal choice for processing special powder materials such as graphite, especially when there are strict requirements for screening accuracy, efficiency and reduction of blockage. It can effectively solve the problem of graphite powder screening, thereby improving production efficiency, product quality and reducing operating costs.