Tumbler Screening Machine for Fine Powder

The Tumbler Screening Machine for Fine Powder separates and grades micron-scale and fragile dry powders. The equipment processes particle sizes ranging from 20 mesh to 500 mesh (28 microns to 840 microns). Its processing throughput spans from 50 kg/h to 5,000 kg/h per unit, directly influenced by bulk density, moisture content, and target mesh size. By adjusting the three-dimensional elliptical motion trajectory, the unit extends the retention path of the powder on the screen mesh, allowing fine particles to stratify and pass through under low impact forces.

Working principle

This equipment utilizes a motion trajectory mimicking manual sieving. The drive eccentric shaft forces the screen box to produce a 3D motion combining planar throwing and rotation, with the tangential angle adjustable between 2° and 8° and the radial angle set between 0° and 5°. Material disperses in a spiral pattern from the screen center toward the edge, experiencing vertical acceleration lower than gravitational acceleration (G-value typically between 1.5g and 2.5g). This low-stress motion reduces particle collision frequency, preserving fragile micro-spheres, crystals, and porous powders without inducing secondary attrition or degradation.

Technical Specifications

Solution

Fine powders easily generate electrostatic adhesion and mesh blinding during sieving. To resolve blinding issues, three physical and high-frequency mesh cleaning configurations are available: first, a rubber bouncing ball system that clears physical pegging between 60 mesh and 150 mesh via tray impact forces; second, a rotating brush system that sweeps sticky or oil-containing powders away using nylon bristles; third, an ultrasonic generator that converts high-frequency electrical energy into 20 kHz to 40 kHz mechanical vibrations transmitted to the wire mesh, reducing surface tension and preventing micro-agglomeration and electrostatic blinding in 200 mesh to 500 mesh ultra-fine powders.

Frequently Asked Questions

Q: What is the physical difference between this machine and a rotary vibrating screen when processing fine powders?
A: Rotary vibrating screens generate high-frequency throwing motion with vertical acceleration often exceeding 5g, causing fine powder dust dispersion and fracturing fragile particles. The tumbler screening machine maintains acceleration at 1.5g to 2.5g, moving material in a gentle spiral roll to reduce particle degradation probabilities.

Q: What operational risks exist when using a used tumbler screening machine?
A: Used units frequently suffer from invisible fatigue damage in the eccentric connecting rod bearings. Prolonged operation leads to inclination positioning misalignment, impacting the material's spiral trajectory and separation purity.

Q: How can throughput efficiency be adjusted for different mesh sizes?
A: By adjusting the tangential and radial angles of the drive shaft. Increasing the tangential angle lengthens the material retention time on the screen mesh, raising the passage probability for higher-mesh fine powders.

Industrial Applications & Case Study

This equipment applies to lithium battery cathode and anode material classification, 3D printing metal powder de-dusting, catalyst micro-sphere particle size control, and construction material micro-powder grading. In a graphite powder processing project where material particle distribution was 200 mesh, the original high-frequency vibrating screen suffered severe blinding within 30 minutes. Replacing it with a 1600mm diameter tumbler screening machine equipped with ultrasonic mesh cleaning maintained operational continuity, stabilizing throughput at 650 kg/h with a passage rate reaching 96%.

Packaging and Transportation

The Tumbler Screening Machine for Fine Powder solves micro-powder degradation and mesh blinding challenges through a 3D elliptical trajectory and low G-value movement. Multi-deck structures with adjustable inclination angles satisfy precise grading demands for powders between 20 mesh and 500 mesh. To request selection guidelines, PDF operation manuals, or arrange a material screening test, please complete the form below to contact our engineering team.