Particle Size Analysis Using an Air-Jet Sieve

Introduction to Air-Jet Sieve Particle Size Distribution Analysis

Air-jet sieving is a widely used method for determining the particle size distribution of fine, dry powders. This technique employs a unique principle involving a vacuum-powered, high-velocity Air-Jet to fluidize sample material and convey undersized particles through a sieve. Unlike traditional vibratory screens, Air-Jet sieves are highly effective for powders prone to accumulation, particularly those with particle sizes less than 60 microns. This method ensures complete recovery of undersized fines, making it a reliable approach for particle size analysis. Air Jet Sieve Machines, with their creative design and cutting-edge functionality, are the chosen choice for scientists, researchers, and engineers who want precise particle size measurement. MaTestLab is one of the leading testing service providers in the USA and Canada. We have an extensive network of testing laboratories in the USA.

Principle and Methodology of Air-Jet Sieve Particle Size Distribution Analysis

The Air-Jet sieving method utilizes a vacuum chamber equipped with a mesh sieve, a rotating slotted fresh air distribution nozzle, and an industrial vacuum cleaner. The analysis begins with the smallest mesh in the range, with the sample powder spread uniformly over the mesh. The vacuum chamber has closed, and the vacuum cleaner is switched on, creating suction that pulls undersized material through the mesh and into the vacuum cleaner. Simultaneously, fresh air jets in through the rotating slotted nozzle, fluidizing the powder on the mesh and preventing agglomeration and mesh blockage.

The change in weight of the sieve caused by loss of undersized material is noted, and any oversized material retained on the sieve is transferred to a fresh sieve for further classification. This process is repeated until the full range of sieves has classified the entire sample. Additionally, a variation of this method, known as the Swiss method, involves using multiple samples, one for each sieve in the stack, with each sample being representative and identical.

Typical standard sieve diameters range from 200 to 203 millimeters, with batch sizes ranging from 10 to 100 grams. The particle size distribution typically spans between 20 and 5000 microns. The vacuum level and speed of the rotating nozzle can be changed as needed, and a cyclone can be placed between the Air-Jet sieve and the vacuum cleaner to capture anything that passes through the sieve.

Instrumentation

Two components comprise an Air Jet Sieve Machine, producing perfect analysis findings. An industrial vacuum cleaner attached to the air jet sieve sieving chamber and a slotted nozzle revolving inside the sieving chamber cooperate flawlessly.

Common Applications of Air-Jet Sieve Particle Size Distribution Analysis

• Gravimetric classification of dry powders. 
• Quality control on raw materials and products 
• Control of batch processes with solids handling 

Industrial Uses of Air-Jet Sieve Particle Size Distribution Analysis 

• Cement Industry and Plastic Processing 
• 3D Printing 
• Chemical specialties in the pharmaceutical industry. 
• Food Industry

Benefits of Air-Jet Sieve Particle Size Distribution Analysis

• Quick and easy handling 
• Enclosed are dust-free measures. 
• The gravimetric approach is accurate and reproducible.

Restrictions associated with the analysis of particle size

• Only suitable for dry powders. 
• Loss of testing materials

Techniques Related to Air-Jet Sieve Particle Size Analysis

Air-jet sieve particle size analysis is related to other techniques, including Laser Diffraction, Dynamic Light Scattering (DLS), Sedimentation, and Coulter Counter.