記録された日時: August 15 2013

Duration: 53 minutes 22 seconds

An introduction to the principles of froth flotation and the importance of the measurement of zeta potential
Table of contents
1. Froth Flotation in mining, minerals and metals
02:37
2. Use your computer headphones or speakers. If you prefer to use your telephone to listen to the audio, please click on request audio in the participant panel.
00:23
3. Untitled
00:50
4. Abstract
00:05
5. Obligatory opening quotation
00:40
6. VIDEO: Ultramafic Nickel Ore Flotation-video
00:00
7. Industries
01:00
8. Synopsis of the Science
01:24
9. Ever wondered about the Golden Fleece?
00:39
10. History
01:05
11. Elmore process
01:20
12. Elmore process
00:25
13. Elmore patents
00:22
14. T A Rickard “The Flotation Process” page 25 Mining and Scientific Press (1916)
00:57
15. E J Pryor “Flotation’s Early Years” pp 217 – 240 in M C Fuerstenau, “Froth Flotation: 50th Anniversary Volume” American Institute of Mining, Metallurgical, and Petroleum Engineers, Inc, New York (1962) Quote on page 219
00:48
16. Importance of the bubbles
01:32
17. Rickard (1916) (known as “T. A.”)
01:12
18. A M Gaudin ‘Flotation’ 2nd Edition McGraw-Hill (1957)
00:42
19. The overall system
00:52
20. Bulk and surface effects….
00:39
21. Chemicals involved in flotation
01:47
22. General plot of recovery against size
00:54
23. Particle size, collector, and frother
00:54
24. Frother
00:42
25. Collector
01:48
26. “Interaction” between the collector and mineral
01:36
27. Idealized situation – it’s all about the surface
00:57
28. The importance of locked particles
01:28
29. “Hydrophobic”/”hydrophillic”
00:26
30. Contact angleGaudin pp 340, 341, 355Note: “After Wark”
00:46
31. Contact angle (Klimpel page 11)Note: we now have ‘coal’ as the surface not galena
00:51
32. Xanthates of higher molecular mass give better recoveries
00:40
33. This relates to the contact angles
00:42
34. Direct measure of interaction - AFM
01:06
35. Electrochemical phase diagrams
00:47
36. Electrochemistry
00:34
37. The Wark and Cox papers
01:11
38. For oxide minerals, oleic acid is the classic molecule
00:39
39. Zeta-pH-flotationhttps://era.library.ualberta.ca/public/datastream/get/uuid:5f273415.../DS1M D Parrent “Separation of Pyrolusite and Hematite by Froth Flotation” thesis submitted to the Faculty of Graduate Studies and Research in partial fulfillment of t
00:51
40. pH
01:00
41. Flotation & pH
00:50
42. Point of Zero Charge (PZC)
01:31
43. Untitled
00:51
44. Be aware of the chemistry…..
00:37
45. Selectivity
00:59
46. Efficiency
01:27
47. Time - kinetics
00:32
48. Time – kinetics - consecutive flotation cells
00:52
49. From Gaudin (pages 411/412)
00:51
50. Freshly cleaved PbS/galena
01:50
51. NaCN
00:37
52. Use of Na2S (depressant)
00:51
53. In the presence of NaCN then the plots are reversed
00:25
54. Sequence for mixed sulfides
00:33
55. Summary
00:34
56. References
01:02
57. Contact Information
01:49