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1 Founded in 1974, PII manufactures and sells air classifiers, media mills, impact mills, roller mills and ball mills. With over 300 machines in more than 32 different countries, we are a global leader in fine and ultra-fine grinding and sizing of dry powders.

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2 2. The Micro-Sizer, A Closer Look 1. Understanding Air Classification In this presentation, we will cover 2 main topics. Click Mouse to move to next slide

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3 Understanding Air Classification Air Classification is an important unit of operation in processing dry powders. The need for improved air classification was also driven by the need for improvements in product quality, such as product uniformity and for finer and better controlled products. These innovative and improved designs are referred to as High Efficiency Classifiers. High efficiency classifiers tend to be more sensitive to changes in the process such as rotor speed, air flow, and particularly feed rate. Dispersion of particles is of the utmost importance in achieving efficient classification. The classifier must have the ability to disperse the feed material. For example, if a classifier lacks the ability to create enough centrifugal spin around the rotor to get adequate particle segregation, or if it lacks the ability to keep particles in suspension long enough to be classified, then efficient classification will not occur. Click Mouse to move to next slide

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4 Optimization of the feed rate, which combined with proper air flow, air particle velocity and rotor speed, will result in optimum classification efficiency. Product fineness is controlled by increasing/decreasing rotor speed. Increasing/decreasing feed rates as well as increasing/decreasing air flows will also affect the fineness of your product but could greatly reduce your efficiency. Product fineness should not be controlled by changing your air-to-solids ratio (through air flow or feed rate adjustments) Click Mouse to move to next slide

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5 The Micro-Sizer Edge Unmatched sharpness of top size cut Instant product selectivity No dust collector required Highest recoverability of fine particles 3 Micron top size capability Feed rates up to 250 TPH Click Mouse to move to next slide

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6 Feed In Coarse Discharge Clean air return due to the super highly efficient cyclone With the Micro-Sizer Air Classifier, separation can be obtained based on particle shape, particle density or particle size. Fines Discharge Click Mouse to move to next slide

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7 Coarse Discharge The Micro-Sizer Air Classifier as shown here can be set up as a bottom fed unit. You can also send the coarse (oversize) back to regrind for a clean closed loop system Feed In Fines Discharge Clean Air Return Click Mouse to move to next slide

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8 The Micro-Sizer Air Classifier is equally suited to be a stand alone unit or in closed circuit with a pulverizer or fine grinding mill. The Micro-Sizer is available in 9 models ModelRotor HPFan HPFeed Rate Min/Max Lab1lb 100 lbs/hr MS-5510100 lbs/hr 2000 lbs/hr MS-1010301 ton/hr 4 tons/hr MS-2020504 tons/hr 20 tons/hr MS-303010020 tons/hr 30 tons/hr MS-505015030 tons/hr 50 tons/hr MS-757520050 tons/hr 75 tons/hr MS-10010025075 tons/hr 150 tons/hr MS-120125300150 tons/hr 250 tons/hr Click Mouse to move to next slide

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9 Progressive Industries Pilot Plant Testing Facilities Test Before You Buy 45,000 Sq./ft. Pilot Plant Fully Equipped Lab w/ Coulter particle size analyzer MS-5 Micro-Sizer and MS-10 Micro-Sizer 33 Roller Mill w/ Micro-Sizer RMC Classifier Retrofit PII Impact Mill PII Trough Mill NPR Mill (stirred media mill) w/ MS-5 in closed loop