記録された日時: August 02 2010

Duration: 37 minutes 21 seconds

This presentation deals with size reduction - a technique found in virtually every industry from mining to pharmacueuticals. We will briefly deal with the long history of size reduction before outlining comminution theories and their applicability.
Table of contents
1. Comminution - history and laws
00:21
2. Posted Abstract
00:17
3. Format
00:44
4. Definition
00:27
5. Comminution
00:58
6. Crushing & Grinding
00:29
7. Why crush? Why grind? Why size reduce?
01:52
8. Examples where size reduction is important
00:45
9. When not to crush?
00:16
10. Crushing before Agricola
00:17
11. Chimpanzees
00:24
12. Black powder
00:44
13. Native American grinding stones
00:14
14. Size reduction - comminution
00:34
15. Crushers and mills
00:15
16. Mills
00:22
17. Size reduction - particle size example!
00:09
18. Breakage of large particle(s)
01:23
19. Breakage of large particle(s)
01:07
20. Comment
00:14
21. Dry and wet milling
01:39
22. The link between energy and size reduction
01:07
23. From muscles to electricity
00:17
24. Most is wasted…
00:29
25. Energy
00:23
26. The laws
01:45
27. Pages 900 - 901
00:43
28. Milling/comminution/size reduction
00:26
29. Rittinger (1867)
00:52
30. Kick (1885)
01:17
31. Proofs of Rittinger’s and Kick’s Laws
00:25
32. Bond (1951/2)
00:39
33. Fred Bond (1899 - 1976)
01:15
34. General form
00:20
35. Specific form (1961)
00:17
36. http://www.met.sgs.com/min_sgs_403_australia_comminution_a4.pdf
00:10
37. BICO (http://www.bicoinc.com/ballMill.html)
00:06
38. Milling/comminution/size reduction
00:09
39. Hukki 4th Law (1960-1975)
00:40
40. Untitled
00:36
41. Alban J Lynch, and Chester A. Rowland The history of grinding Soc./Mining, Metallurgy & Expl., 2005 ISBN 0-87335-238-6
00:10
42. Milling/comminution/size reduction
00:09
43. Rittinger
00:13
44. Modeling comminution distributions
01:19
45. General form of equation
00:21
46. Rosin-Rammler-(Sperling-Bennett-Weibull)
00:18
47. …..or more simply Rosin-Rammler
00:21
48. RRSB
00:32
49. RRSB
00:47
50. Energy Consumption
00:25
51. Cement – energy consumption 32mm screen
00:40
52. Laws of comminution
00:21
53. Some words on wet size reduction Milling to nano dimensions?
00:30
54. Why?
00:38
55. Wet reduces (tendency to) aggregation Michael Peters, Plant Manager, Pfizer Pty. Ltd, West Ryde, NSW, Australia "Size reduction in pharmaceuticals" Australian Chemical Processing and Engineering July 1969 pp 22 - 27
00:59
56. Colloid mills
00:18
57. Energy/Time! x50, x90, x99
00:41
58. Classifier Efficiency Tromp Curve
00:14
59. Grade Efficiency (Tromp) Curve
00:27
60. Grade Efficiency (Tromp) Curve
00:57
61. Grade Efficiency (Tromp) Curves
00:52
62. Grade Efficiency (Tromp) Curves
00:12
63. Thank you!
00:30