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PMT- J etmill GmbH

PMT- J etmill GmbH. New Developments in Filler Micronization Jürgen Roth, Veronika Mayer. Ultrafine Grinding ’06, Falmouth, UK 12.-13. June 2006. Outline. Requirements of the Filler Industry Compound Reinforcement Comparison of Grinding Technologies Basics of Jetmilling

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PMT- J etmill GmbH

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  1. PMT- Jetmill GmbH New Developments in Filler Micronization Jürgen Roth, Veronika Mayer Ultrafine Grinding ’06, Falmouth, UK 12.-13. June 2006

  2. Outline • Requirements of the Filler Industry • Compound Reinforcement • Comparison of Grinding Technologies • Basics of Jetmilling • PMT Spiral Jet Mill • Some Application Results • Conclusions

  3. Requirements of the Filler Industry The Future • Increasing Technical Demand from Compounders • Change from 'Extender Fillers' to 'Functional Fillers' • Importance of the Processing Stage to Enhance the Functional Properties of Minerals

  4. Requirements of the Filler Industry Fillers are now High-Tech Products Compounders are looking for a Solution, not for a “Crushed Rock”

  5. Requirements of the Filler Industry The Target - Finest Products • Finest Particle Sizes (d50) • Exact Top Cut (d97) • Improvement of the Functional Properties • Lower Specific Energy Consumption • Industrial Scale Size Output • Guaranteed Operational Reliability

  6. Compound Reinforcement • Ec …. Modulus Compound • Em … Modulus Matrix • A … Aspect Ratio • B, C … Empirical Functions of Filler Modulus, Packing Fraction, Filler Loading • F ……. Filler Volume Fraction Nielson Equation Fillers with High Aspect Ratio Reinforce Better

  7. Aspect Ratio (after W. Hohenberger) • A .......... Aspect Ratio • Os ......... Specific Surface • rF ........... Filler Density • d50, d84 ... PSD Values

  8. Aspect Ratio – Lamellarity

  9. Comparison of Grinding Technologies Opposed Jetmill Spiral Jetmill Impact - Jetmill • Best operational area Mohs 4 to 10or • cubic shape or • metal powders • Wearless and iron free grinding • Comminution by particle - particle collisions • Best operational area Mohs 1 to 4 with • laminar, layered or porous structure • Comminution by high velocity differences • high delamination effects • Lower particle collisions • Best operational area Mohs 4 to 10 • Big wear of the target plate • Not an iron free product

  10. Suitable Minerals Soft to middle hard minerals Lamellar or porous structure • Graphite • Barite • Mica • Talc • Wollastonite • Zeolite • etc.

  11. Spiral Jetmill Scheme • Injector Feed • Nozzles Around the Circumference • Spiral Stream Classifying

  12. PMT Spiral Jetmill SJ Concentration of the Grinding Energy Higher Milling Chamber Special Feed Control System Coarse Product Outlet for Hard Grindable Materials Constant Loading

  13. Advantages of PMT Jetmill System • Exact Top Cut (d97) 2. Coarse Product Outlet 3. Energy Consumption 4. Operational Reliability

  14. Cumulative Mass Percent Passing 1. Exact Top Cut Particle Size Distribution after Sympatec Helos e.g.Graphite Equivalent Spherical Diameter [µm] Legend: d97[µm] d50[µm] rpm kWh/t Graphite Sample 1 8.4 3.38 9,700 2,060 GraphiteSample 2 12.9 5.16 6,700 1,190 Graphite Sample 3 20.9 8.12 3,700 485

  15. 1.Exact Top Cut e.g.Barite Particle Size Distribution after Sedigraph Cumulative Mass Percent Passing Equivalent Spherical Diameter [µm] Legend: d97[µm] d50[µm] rpm kWh/t Barite Sample 1 2.65 0.88 7,200 1,260 Barite Sample 2 6.40 1.74 3,200 240 Barite Sample 3 12.10 2.54 1,500 85

  16. Dchgangs-% Äquivalenter Kugeldurchmesser [µm] 1. Exact Top Cut e.g.Mica Particle Size Distribution after Sedigraph Cumulative Mass Percent Passing 10 1 Equivalent Spherical Diameter [µm] Legend: d97[µm] d50[µm] rpm kWh/t Mica Sample 1 7.6 2.18 5,700 1,340 Mica Sample 2 11.2 3.00 4,200 810 Mica Sample 3 14.8 3.96 3,000 475 Mica Sample 4 23.1 6.22 2,200 290

  17. Durchgangs-% Äquivalenter Kugeldurchmesser [µm] Legend: d97[µm] d50[µm] rpm kWh/t Talc Sample 1 3.9 1.01 6,800 1,250 Talc Sample 2 5.7 1.75 4,000 540 Talc Sample 3 9.0 2.81 2,700 290 Talc Sample 4 15.8 4.58 1,700 145 1. Exact Top Cut e.g.Talc Particle Size Distribution after Sedigraph Cumulative Mass Percent Passing Equivalent Spherical Diameter [µm]

  18. 2. Coarse Product Outlet e.g.Talc 1 ... Talc 2 ... Quartz Final Product Reject Product 3 ... Dolomite 4 ... Calzite 5 ... Chlorite 6 ... Muscovite 7 ... Feldspar 8 ... Montmorillonite

  19. 3. Energy Consumption Up to 30 % Less Energy

  20. 4. Operational Reliability Integrated Motor - Rotor - Unit • Circumferential Speed up to160 m/s • Exact Top Cut • Simple Disk Assembly • Specially Developed Rotor Shape • Only One Bearing System Maintenance Free and Operational Reliability

  21. PMT Spiral- Jetmill SJ THE LATEST GENERATION • Up to 30% less Energy Consumption • Increase of the Grinding Efficiency due to the Closed Grinding- and Classifying Circuit • Easy Adjustment of Fineness by Regulation of Rotor Speed • Coarse Product Outlet

  22. 40 % Talc in PPh 4000 PMT Jetmill SJ Stirred Media Mill 3875 3750 ] 2 3625 3500 Modulus [N/mm Feed Material 3375 3250 3125 Filler Consulting 3000 1 2 3 4 5 6 7 8 9 10 20 30 40 50 Top Cut [µm] Application Results

  23. 40 % Mica in PPc 4000 3500 ] 2 3000 E-Modulus [N/mm 2500 2000 1500 1000 E-Modulus Spiral Jetmill Opposed Type Jetmill Aspect Ratio Vertical Ball Mill Table Roller Mill Stirred Media Mill Application Results

  24. PMT Spiral Jetmill – Plant Layout

  25. Vienna Kammern Graz PMT – Jetmill GmbH Powder Managed Together PMT – Jetmill GmbH Industriepark 1 A-8773 Kammern, AUSTRIA Tel: +43 3844 80350-0 Fax: +43 3844 80350-20 http:\\www.powder-maker.com jetmill@powder-maker.com

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