Fecha registrada: May 07 2019

Duration: 40 minutes 45 seconds

Fineness of cement is one of the main contributors to physical properties like hydration setting time and strength and is an important specification parameter in norms like ASTM C150. Typically, fine particles contribute to exothermal hydration and will lead to cracking, while coarse particles hamper the hydration process through reduced surface area.

Blaine and sieving are well established techniques to characterize the fineness of cement through one single “averaged” number. However, this does not give the full picture as cement consists of a full particle size distribution from fine particles through to coarse particles. It is in fact this full particle size distribution that determines the overall physical properties of cement. For example, two different cements with the same Blaine number can still have very different hydraulic properties which can be explained by the full particle size distribution. Furthermore, the full particle size distribution of raw materials and cement is strongly connected to the energy consumption during milling and grinding as well as the fuel consumption in the kiln.

Laser diffraction is a technique that gives the full particle size distribution of cement and its intermediate products, which are available as lab and on-line instruments for real time information and process control. During this webinar QC managers, process control managers and plant managers will learn how the technique works and how the technique can be implemented in the production process to optimize the cement quality, reduce energy and fuel consumption and increase margins.

Table of contents
1. Discover how particle size analysis can improve the cement making process
03:15
2. Overview
00:45
3. Why particle sizing in cement
00:05
4. Why is this important
01:08
5. Why is this important
00:51
6. Milling and grinding – a balancing act
01:22
7. A balancing act
00:51
8. The eyes are important
00:29
9. Current Techniques
00:08
10. Blaine measurements
01:16
11. Single sieve measurements
00:51
12. Having a better view with full particle size distribution
00:30
13. Particle size of powder cannot be described with one number
00:32
14. A full particle size distribution...
01:28
15. Same Blaine, but different physical properties
01:29
16. What can you do with the information?
00:33
17. Particle sizing as feedback loop
01:02
18. One step further...going on-line
01:03
19. Vulcan materials...
01:20
20. The technique
00:24
21. Laser diffraction measures scattered light
00:33
22. Laser diffraction - light scattering
00:40
23. Particle size by laser diffraction
00:21
24. Reporting and interpreting the results
00:47
25. Correlation with existing Blaine measurements
00:34
26. Single sieve transfer to laser diffraction
00:39
27. Lab and On-Line instruments
00:09
28. Laser diffraction in the cement making process
00:19
29. Automated operation of lab systems
00:13
30. Cement
00:49
31. Cement
01:08
32. Assessing separator efficiency
01:14
33. Assessing separator efficiency
00:00
34. Assessing separator efficiency
00:48
35. Laser diffraction in the cement making process
00:56
36. Laser diffraction in the cement making process
00:47
37. Continuous on-line measurements
00:16
38. On-line solutions can be implemented across a range of sampling points
01:01
39. Data access for all systems
00:16
40. Controlling the mill classifier speed
00:54
41. Process Optimisation
01:12
42. Conclusions
00:12
43. Take away messages
01:35
44. Untitled
03:51
45. Contact information
02:09