Fecha registrada: August 23 2018

Duration: 50 minutes 50 seconds

The careful control of process parameters in the cement industry is the difference between profit and failure in an industry where specifications are fixed and the variables are the feed composition and energy costs.  Raw materials (chiefly limestone, clay, supplementary materials) of differing compositions are needed to be blended to provide the correct phase chemistry after the rotary kiln furnace step.  The blending of these minerals is a skilled art and XRF allows the compositions to be assessed in the storage silos before production of the raw meal and afterwards in the finished cement.  Percentages of calcium, silica, iron, aluminum etc are routinely measured with XRF using ASTM and ISO standards to provide the guidelines.  Grinding of the cement is a highly energy intensive process.  Indeed 1% of the world’s electrical supply is used in this step.  Again international standards dictate the fineness to which cement is ground to different specifications and the successful companies are those that can manage the grinding and classification processes in the most cost-effective way.  Both laboratory and on-line particle size analysis provide this route to quality and production control. This webinar provides an introduction to XRF and particle sizing as applied to the cement industry with an emphasis of the financial implications of control.  We’ll provide an introduction to the Epsilon XRF equipment and the Mastersizer 3000 laser diffraction particle size analyzer including looking at classifier efficiency (Tromp curve) in the latter.
Table of contents
1. Introduction to X-ray fluorescence (XRF) and particle characterization in cement
02:06
2. The importance of particle size distribution measurement in the cement and limestone industries
00:25
3. New Windows operating system Joke circa 1998 (Happy 20th!)
00:24
4. Why?
01:32
5. The process
00:45
6. Where?
00:37
7. Why?
00:54
8. Why is particle size important?
00:44
9. Energy is important!
01:03
10. Most energy in a comminution circuit is wasted
00:30
11. Specifications
00:50
12. Specifications
00:38
13. Methods for cement particle size measurement
01:03
14. Other (historical or hysterical) methods
00:23
15. Resolution and tolerance
00:52
16. Blaine – it’s magic…
00:29
17. Blaine measurements
01:00
18. Blaine measurements disadvantages
00:05
19. Why laser diffraction?
00:05
20. Traditional Off-Line Fineness Measurements
00:11
21. On-line solution for real time control
00:36
22. Typical install in cement grinding Circuit
00:33
23. Unit operations – milling circuits
00:42
24. Cement – closed circuit unit operation
00:18
25. Malvern Application Note MRK1262-01
01:08
26. Practical and ideal Tromp plots
00:29
27. Cyclones (air or hydro)
00:40
28. Cyclone design
00:22
29. And over, to you Stephen
00:13
30. Use of X-ray Fluorescence Spectrometry in the cement industry
00:05
31. Objectives
00:05
32. Portland cement
02:16
33. Why use XRF for cement analysis?
00:05
34. Why Use XRF?
01:48
35. Why Use XRF?
01:07
36. Wilhelm Conrad Röntgen
00:11
37. Untitled
00:05
38. Types of XRF
01:13
39. Zetium: WDXRF
01:16
40. How does an XRF Work?
01:18
41. Wavelength Dispersive XRF
00:58
42. Energy Dispersive XRF
00:40
43. WDXRF and EDXRF compared
02:04
44. EDXRF vs WDXRF
01:15
45. XRF Calibration Example CaO in beads
00:41
46. Fundamental Parameters
00:35
47. Co in beads no matrix correction
00:31
48. Co in beads using matrix correction
00:32
49. Calibration standards
01:21
50. Precision in X-ray analysis
01:00
51. Sample preparation
00:51
52. Grinding and pressing
00:22
53. Sample Preparation by Fusion
00:34
54. Universal vs. In Type Calibrations
00:58
55. International standards
01:38
56. Future of XRF analysis in the cement industry
02:53
57. Thank you for joining us today
00:18
58. Question &Answer SessionThank you for attendingSee more at :www.malvernpanalytical.com/learn
04:33