Duration: 52 minutes 04 seconds

This presentation discusses the Tromp curve and its use in describing classifier efficiency.
1. The Tromp curve in the MMM industries
02:13
2. Abstract
00:25
3. Often it is better to be second than first
00:45
4. H W Newton, W H Newton “A Study of Classification Calculations”, Rock Products, 35(16), 26-30 (1932)
00:29
5. “Het Patent Tromp” Paul Geilenkirchen
00:53
6. Lessing Medal
00:53
7. An aside - The US Jackson Pollock stamp….[Hear also David Hughes “Nobody Smokes in America” This Other Eden (1999)]
00:34
8. OK back to….. Klaas Frederik Tromp
00:21
9. KerkradeHe had successfully applied for a job at the Domaniale Mine
00:28
10. Coal Washing
00:49
11. Over 60 patents to his name
00:19
12. Coal washing
00:25
13. US Patent 2139047
00:51
14. Coal Washing
00:37
15. Coal washing
00:19
16. The original paper
00:37
17. Citation
01:09
18. Separation/classification/partition
01:27
19. Applications areas
01:04
20. Computation
02:20
21. Calculation Routes
02:08
22. Basis of the calculation
01:20
23. Separation/total fines efficiency
00:59
24. Mass fractions
01:09
25. Circulation ratio and circulating load
01:06
26. Circulation ratio and circulating load
01:42
27. Unit operations – milling processes
00:05
28. Unit operations – milling circuits
00:52
29. Cement
01:13
30. Cumulative and frequency plots
01:19
31. The Tromp curve calculation
00:35
32. 2 ways of doing this
00:19
33. One example only!
00:56
34. It is convenient to designate 3 constants
00:52
35. The particle size distributions
00:49
36. We can then calculate 2 new values (A & B) and from these the Tromp and corrected Tromp values
02:01
00:48
38. The plots Vertical axis is probability; horizontal is size (nm)
00:53
39. Malvern Application Note MRK1262-01Particle Sizing of Cement using the Mastersizer 2000
00:49
40. Practical and ideal Tromp plotsNote the “fish-hook” shape
00:40
41. Fish hook effect
02:44
42. Probable error of separation, ET, or Ecart probable/Ecart Terra
01:04
43. Many formulae for the curve
01:00
44. Bennet (1936) – the ‘B’ in RRSB….
01:08
45. Applies to nuclear explosion fragments too..
00:37
46. http://www.themininggrindingoffice.com
00:16
47. Untitled
00:15
48. Cyclones (air or hydro)
01:19
49. Cyclone design
00:33
50. Cyclones
00:49
51. Malvern Application Note MRK1262-01 Particle Sizing of Cement using the Mastersizer 2000
00:12
52. Death
00:44
53. References
00:48
54. Older Malvern white papers
00:17
55. Older Malvern white papers
00:15
56. Acknowledgements and Thanks
00:31
57. Contact Information
01:59