By Aveka Inc
The AVEKA Cottage Grove Centrifugal Air Classifier is designed to separate fine particles in the less than 75μm range. This is achieved by utilizing the opposed forces of centrifugal force and aerodynamic drag to sort the particles by mass, resulting in a coarse particle fraction and a fine particle fraction. The Classifier is able to achieve a precise, predictable, and extremely sharp separation at a high solids loading. The Model 100 Classifier system is ideal for the production of lab size samples, product development and/or small quantity production. The larger Model 250 and Model 500 offer precision classification at higher production rates. The AVEKA Cottage Grove Classifier operates as follows: the space between the outer edge of the blades and the periphery of the rotor forms the classification zone. The coarse particle fraction, which is rejected outward by the centrifugal field, is conveyed out of the Classifier through the coarse outlet and captured in a cyclone. The cyclone overflow is returned to the Classifier through the recycle port. The fine particle fraction leaves the Classifier through the central fines outlet with the primary air flow. Our Classifiers come complete with all the major components necessary for classification of dry powders in the less than 75 micron size range. A typical system includes the Classifier assembly, flow source, coarse and fine fraction collectors, feed system, and controls. Component selection and design are application specific to meet your requirements. AVEKA Cottage Grove will work closely with you to understand your needs and which model(s) bet fits your application. Our engineers will work with you to customize the system to fit well within your process and bring value to your project, ensuring your needs are met with the right precision equipment. Capabilities and Equipment Specs Model No 100 250 500 PERFORMANCE RANGE* Cut Size (D50), Microns 1-30 1-50 2-50 Sharpness (D25/D75).6-.8.6-.8.6-.8 Feed Rate, kg/hr. to 15 to 225 to 900 *Depending on feed material characteristics, desired cut size, and solids loading. At particle density of 2.6 gms./cc. OPERATING RANGE Rotor Speed rpm 700-7000 400-4000 360-3600 Primary Air Flow, scfm to 70 to 250 to 800 Max. Operation Vac, In. Hg 12 12 12 Rotor Drive, HP 1.5 3 15 Primary Flow Source, HP 7.5 25 75 Compressed Air scfm @100 psig 6 12 40
AVEKA Cottage Grove designs, builds, and sells fluidized bed jet mills custom to your milling needs. AVEKA Cottage Grove’s Fluidized Bed Jet Mills are able to achieve fine particle sizes at high throughput with narrow particle size distribution. Sizes as fine as 1 micron are possible with some materials. The mills are also effective at milling very abrasive materials with minimal wear because the system relies on particle-on-particle impact and is built with wear-resistant surfaces and components. The AVEKA Cottage Grove mills are uniquely valuable in terms of efficiency when compared to 1) other dry milling methods by which to achieve ultra-fine particle sizes, or 2) wet grinding methods which require a costly drying step thereafter. The AVEKA CCE Fluidized Bed Jet Mill System comes complete with mill, flow source, product cyclone and/or collector, feed system and control package. Product Line Description – Production Scale Jet Mills: Model No. DPM-1 DPM-2 DPM-3 DPM-4 Air Flow, scfm 150 – 250 300 – 500 600 – 1000 1100 – 1500 Number of nozzles 3 3 3 3 Rotor speed, rpm 500 – 9000 400 – 5200 360 – 3600 310 – 3100 Drive, HP 5 10 – 15 15 – 20 20 – 25 System Requirements: Primary Air, HP 15 30 40 60 Purge Air, HP 1.0 2.0 5.0 7.5 Airflow at 100 psig, dependent on nozzle size selection Narrow product size distributions Load cell control Precise top size control Temperature sensitive materials Simple cost effective design Abrasive resistant linings Low maintenance/easy to clean Four sizes ranging from 150 to 1500 scfm Ideal for toners, abrasives, powder coatings and other fine powder applications Wear resistant coatings Polyurethane throughout mill body Classifier rotor plasma-coated with tungsten carbide
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