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Particle Size Analyzer by G.P.A.

Particle Size Analyzer by G.P.A. Sponsor: Howard Wyncoop Company: Coach: Dr. E. Dow Whitney R & D Advisor: Dr. Hassan El-Shall Group Members: George Katzaras Dave Matthew Tim Miller Will Pacheco

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Particle Size Analyzer by G.P.A.

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  1. Particle Size Analyzer by G.P.A. Sponsor: Howard Wyncoop Company: Coach: Dr. E. Dow Whitney R & D Advisor: Dr. Hassan El-Shall Group Members: George Katzaras Dave Matthew Tim Miller Will Pacheco Erik Seppanen

  2. Outline • Background of Mining Process • Objective • Product Specifications • Design Selection • Experimental Plan and Procedure • Results • Analysis • Conclusion • Issues • Future Work

  3. Mining Process Draglines Hydrosizers Flotation

  4. Design and develop particle analysis instrumentation to provide real-time monitoring for continuous process control and optimization of hydrosizers. Problem Statement

  5. Product Specifications Particle Size Range: Tolerance of all sizes Solid Concentration Range: 0 - 80% Absolute Accuracy:  10% error Size Fraction Output Signal: 4 - 20 mA

  6. Experimental Procedure • Pre-screened and weighed representative samples • Set desired variables • Injected sample • 15 minute run • Collected overflow and underflow particles • Dried samples • Performed screen analysis

  7. Preliminary Set of Experiments

  8. Responses of variable interactions Responses of individual variables

  9. Second Set of Experiments

  10. Optimum Settings: 4.5 gpm Teeter, 2.5 gpm Slurry

  11. Definition of Efficiency • Conceptually, Efficiency is: % of -35M that is going where it should (minus) % of 35M that is not going where it should • The efficiencies for the overflow and underflow are the same. The calculation differentiates between the -35M & 35M only.

  12. Mean Efficiency The mean efficiency for splitting the sample at 35M was: (The figure in parentheses denotes a 95-percent Confidence Interval) 86.99% (+/- 3.71%)

  13. Future Work • Fine-tune variables to increase efficiency • Field Test Dynawhirl at Cargill • Develop instrumentation for automated measurement • Implement Final Product at Cargill • Model and make adaptable for variable sizer stream

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