Focused beam reflectance measurement for monitoring the extent and efficiency of flocculation in mineral systems
Focused beam reflectance measurement (FBRM), where a scanning laser focused through a sapphire window measures real-time reflected chord distributions without solids dilution, is attractive for characterizing flocculation performance. An enhanced measurement principle in new FBRM instruments has imp...
| Main Authors: | , , , |
|---|---|
| Format: | Journal Article |
| Published: |
John Wiley & Sons
2014
|
| Subjects: | |
| Online Access: | http://hdl.handle.net/20.500.11937/19595 |
| id |
curtin-20.500.11937-19595 |
|---|---|
| recordtype |
eprints |
| spelling |
curtin-20.500.11937-195952017-09-13T13:45:15Z Focused beam reflectance measurement for monitoring the extent and efficiency of flocculation in mineral systems Senaputra, A. Jones, Franca Fawell, P. Smith, P. flocculation aggregate size focused beam reflectance measurement fines capture flocculant Focused beam reflectance measurement (FBRM), where a scanning laser focused through a sapphire window measures real-time reflected chord distributions without solids dilution, is attractive for characterizing flocculation performance. An enhanced measurement principle in new FBRM instruments has implications for flocculation studies, demonstrated using hematite in synthetic Bayer liquor. Comparisons of previous (M500) and new (G400) instruments were complicated by the impact of their different physical dimensions upon flocculation hydrodynamics, but the G400 clearly measured larger chords. The original measurement principle based on a reflected intensity threshold counts large low-density aggregates as multiple chords; in contrast, the change to “edge detection” (very low threshold) is more likely to see a single chord, an advantage for studying mineral systems (aggregates often >500 µm). The G400 also captures bimodal character in unweighted chord distributions, producing distinct peaks for aggregates and fines after suboptimal flocculation; such peaks are rarely well resolved in older FBRM. 2014 Journal Article http://hdl.handle.net/20.500.11937/19595 10.1002/aic.14256 John Wiley & Sons restricted |
| repository_type |
Digital Repository |
| institution_category |
Local University |
| institution |
Curtin University Malaysia |
| building |
Curtin Institutional Repository |
| collection |
Online Access |
| topic |
flocculation aggregate size focused beam reflectance measurement fines capture flocculant |
| spellingShingle |
flocculation aggregate size focused beam reflectance measurement fines capture flocculant Senaputra, A. Jones, Franca Fawell, P. Smith, P. Focused beam reflectance measurement for monitoring the extent and efficiency of flocculation in mineral systems |
| description |
Focused beam reflectance measurement (FBRM), where a scanning laser focused through a sapphire window measures real-time reflected chord distributions without solids dilution, is attractive for characterizing flocculation performance. An enhanced measurement principle in new FBRM instruments has implications for flocculation studies, demonstrated using hematite in synthetic Bayer liquor. Comparisons of previous (M500) and new (G400) instruments were complicated by the impact of their different physical dimensions upon flocculation hydrodynamics, but the G400 clearly measured larger chords. The original measurement principle based on a reflected intensity threshold counts large low-density aggregates as multiple chords; in contrast, the change to “edge detection” (very low threshold) is more likely to see a single chord, an advantage for studying mineral systems (aggregates often >500 µm). The G400 also captures bimodal character in unweighted chord distributions, producing distinct peaks for aggregates and fines after suboptimal flocculation; such peaks are rarely well resolved in older FBRM. |
| format |
Journal Article |
| author |
Senaputra, A. Jones, Franca Fawell, P. Smith, P. |
| author_facet |
Senaputra, A. Jones, Franca Fawell, P. Smith, P. |
| author_sort |
Senaputra, A. |
| title |
Focused beam reflectance measurement for monitoring the extent and efficiency of flocculation in mineral systems |
| title_short |
Focused beam reflectance measurement for monitoring the extent and efficiency of flocculation in mineral systems |
| title_full |
Focused beam reflectance measurement for monitoring the extent and efficiency of flocculation in mineral systems |
| title_fullStr |
Focused beam reflectance measurement for monitoring the extent and efficiency of flocculation in mineral systems |
| title_full_unstemmed |
Focused beam reflectance measurement for monitoring the extent and efficiency of flocculation in mineral systems |
| title_sort |
focused beam reflectance measurement for monitoring the extent and efficiency of flocculation in mineral systems |
| publisher |
John Wiley & Sons |
| publishDate |
2014 |
| url |
http://hdl.handle.net/20.500.11937/19595 |
| first_indexed |
2018-09-06T20:02:38Z |
| last_indexed |
2018-09-06T20:02:38Z |
| _version_ |
1610889726379687936 |