PRF - Particle Size Reduction
At PRF we have over fifteen years of experience in size reduction of a variety of materials from polymers such as nylon and PMMA to a wide variety of powder coatings, pharmaceuticals, and inorganic powders. Our engineering expertise can determine the most suitable, cost-effective technology for your application.
1. Air Classifying Mill (ACM):
The Air Classifying Mill (ACM) operates on the principle of impact grinding. Particle size reduction is achieved in these mills through the impact of the particles with the high speed rotating pins and fixed liner. Particle-to-particle collision also contributes to the particle size reduction. During milling the fine particles are carried out by the air circulating in the mill, while coarse particles remain in the mill. The particles are carried to a classifier where the ultrafine particles are passed through a pipe to a baghouse, and the remaining fine particles go to a rotary-sieve where final particle separation occurs. Cut sizes are accurately controlled by varying the classifier speed.
Features and Benefits:
Very Narrow Particle Size Distribution - One pass milling resulting in accurate particle size cut points that are instantly adjustable and narrow particle size distribution.
Fine Grinding Capabilities - Particle can be grinded down to about 10 microns in one pass.
Minimum Material Contamination - Internals of the mill are easily removed and cleaned making material changeover easy, and hygienic.
The PRF has two different Spiral Jet Mills that are ideal for laboratory applications, and the processing of small batches of material. Jet Mills achieve particle size reduction through particle-to-particle and particle-to-wall collisions using high velocity air nozzles. Powders can ben milled with a large percentage of ultrafine (0.5 to 20 micron) particles produced.
Opposed Jet Mills are engineered to consistently produce ultrafine powders without oversize particles resulting in narrow particle size distributions. Size reduction in an opposed jet mill is achieved exclusively by particle-to-particle collisions. The unit includes a high speed internal classifier ensures tight top size control without over grinding. During the process the ground product is transported to the classifier in an upwards air flow, the final product enters into a collector through the fine material discharge, while the coarse materials returns back into the product bed for further size reduction. This mill is also capable of producing powders with particle size averages as low as 1 - 2 microns, with a large percentage of particles in the 0.5 - 5 micron range.
For more information on our milling equipment and services, please contact us. For information on standard Charges please click here.
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Contact Info
Particle Research Facility
Yong Liu, Manager Thompson Eng. Bld., Rm. 217
Tel: (519) 661-4243
Fax: (519) 661-3498
Email: prf@powders.ca
