Size reduction and the importance of particle size
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Rich Robatzek, Product Manager, Sturtevant
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Size reduction and the importance of particle size
- 1. Size Reduction and the Importance of Low Particle Size
- 2. Who Am I? Rich Robatzek – Product Manager, Sturtevant Inc. Business development manager for the Micronizer® jet mill product line. Extensive background as a Sales Manager contributing to the growth and profitability of manufacturing companies More than 20 years of industrial sales experience, growing sales territories, leading sales teams and developing new business. Experience in food, pharmaceutical, and consumer good industries
- 3. Sturtevant - Perfecting Particle Size Perfecting Service Over 60% of our sales are repeat customers • All operations are under one roof which results in fast, reliable problem solving • open, full service testing facility to test each customer’s specific material and understand the grinding characteristics • An experienced field team is available for startup and field service. Perfecting Experience Thousands of installations, 60 years of micronizing • The original Micronizer® company • Sturtevant employees average over 20 years of service • Customer driven innovations including more sizes, varieties and accessories than any other jet mill manufacturer Perfecting Reliability 130 years of family operated, US manufacturing • Sturtevant President W. Sturtevant English, Jr. is the fifth generation of family management • Made in the USA means Sturtevant’s Center of Excellence and all product knowledge is domestic and easy to access • Installations in over 50 countries with every major manufacturer requiring fine grinding
- 4. Crushing / Grinding Methods • Impact • Compression • Shear • Attrition
- 5. What is Micronization? Micronization is the process of reducing a solid materials average particle size to low micron and sub micron particle sizes.
- 6. Why is Micronization Important in Industry? • Control of rate of dissolution and absorption • Control of chemical reactions. • Control of physical characteristics
- 7. Why is Micronization Important in Industry? • Control optical properties. • Product Preparations. • Efficiency – Your competitive advantage.
- 8. Benefits of Micronized Particles • Higher Surface Area • Tight Particle Size Distribution • Uniform Size, Spherical Shape • Better Control Properties of Powders, • (suspension, dispersion & absorption) • More Predictable Performance of Powders
- 9. Total Surface Area vs Particle Diameter for Spherical Objects 0 10000 20000 30000 40000 50000 60000 70000 0 10 20 30 40 50 60 70 80 90 TotalSurfaceArea(in2) Diameter (µm) 0.5 µm = 500 Nm 1 µm = 1,000 Nm 2 µm = 2,000 Nm 5 µm = 5,000 Nm 10 µm = 10,000 Nm
- 10. Tight Particle Size Distribution d50 d90d10 Ultra Fines Grit Micronized PSD Similar d50 Median But Lower Mean (Average) Less Grit/Less Ultrafines
- 11. Uniform Spherical Particles Wide PSD – Irregular Particles Tight PSD – Uniform Spherical Particles Before Micronizing (-50 microns) After Micronizing (-10 microns)
- 13. Factors of Grindability • Brittle vs. Resilient • Crystalline • Fibrous or Polymeric • Feed Particle Size • Typically 75-150 Microns • Max 800 Microns • Multi-Element Formulation • Moisture or Cohesive
- 14. How Feed Rate Affects Particle Size Distribution Cosmetic Powders Feed: d100 = 416 µm, d90 = 29 µm, d50 = 6.0 µm, d10 = 1.3 µm Test No. 11: d100 = 15 µm, d90 = 6.0 µm, d50 = 2.7 µm, d10 = 1.0 µm Test No. 12: d100 = 20 µm, d90 = 7.5 µm, d50 = 3.2 µm, d10 = 1.1 µm
- 15. Pharmaceuticals Advantageous for Ease of Cleaning, No Contamination & Small Batches • Orals, Injectables, Inhalers, Topicals, etc. • Antibiotics • Amino Acids • Steroids • Vitamins
- 16. Pharmaceuticals Dolasetron Mesylate for Nausea Ibuprophen Feed d50=25 µm Test 1 d50=1.5 µm Test 2 d50=2.1 µm
- 17. Advantageous for High Surface Area • Greater Coverage, Consistent Color in Paints • TiO2, Carbon Black, Iron Oxide • Finer than hammer mill • No oversize grit • Very smooth products Pigment
- 19. Cosmetics Advantageous for Silky Texture, No Heat • Eye Shadow, Blush, Lipstick, Eye Liners • Finer than hammer mill • No oversize grit • Very smooth products
- 20. Cosmetic Powder Feed: d90 = 17.2 µm, d50 = 5.84 µm, d10 = 1.56 µm Test 1: d90 = 7.17 µm, d50 = 3.41 µm, d10 = 1.17 µm
- 21. Agricultural Chemicals Advantageous for Heat Sensitive Powders • Herbicides, Pesticides, Insecticides, Fungicides • No temperature rise • Powder dissolves easily • No spray nozzle clog
- 22. Agricultural Chemicals Herbicide used in the Agricultural Industry Feed: d100 = 665 µm, d90 = 81.6 µm, d50 = 8.51 µm, d10 = 1.43 µm Test 1: d100 = 21.1 µm,d90 = 8.59 µm, d50 = 2.90 µm, d10 = 0.56 µm
- 23. Ceramics Advantageous for Abrasive Powders • No contamination in electronics & dental implants • Aluminum Oxide, Zirconium Oxide, Glass • No moving parts • Ceramic wear liners • No lubrication • No oversize grit
- 24. Foods & Additives Advantageous for Ease of Cleaning, No Contamination & No Heat • Sugar/Sweeteners/Salts (instant soups, sodas) • Proteins (baby formulas) • Gelatin/Sodium Cellulose (thickeners)
- 26. Fineness Vs Energy Equipment Product HP lb/hr lb/hr per HP Jaw Crusher 1/2”- 2” 10 6K – 20K 600-2000 Pin Mill 45-75 µm 20 2K – 4K 100-200 ACM 20-45 µm 35 200 – 2K 6-60 Jet Mill 0-20 µm 40 10 – 100 0.25-2.5
- 27. Production System 1 2 3 1) Feeder 2) Micronizer® 3) Bag House 4) Product Collector 4 Up to 42” diameter 6,000 lbs/hr
- 28. Q&A Rich Robatzek Micronizer® Product Manager Office: 978-829-1418 Cell: 617-615-7176 rrobatzek@sturtevantinc.com Micronizer® is a registered trademark of Sturtevant Inc.
- 29. Perfecting Particle Size since 1883