Difference between revisions of "Bibliography: Benchmarking"
(→Benchmarking: Mill Power Draw) |
(→Benchmarking: Mill Power Draw) |
||
| Line 13: | Line 13: | ||
** Belly length inside liners (EGL) = 4.417 m |
** Belly length inside liners (EGL) = 4.417 m |
||
** Centre-line length = 6.920 m |
** Centre-line length = 6.920 m |
||
| − | Table 4 presents results of several SAG surveys at different speed and load conditions. The survey measured motor input power. Drives are assumed to have an efficiency of 0.96 and pinion efficiency of 0.985, so the model shell power draw is converted to motor input power by dividing by 0.9456. |
+ | Table 4 presents results of several SAG surveys at different speed and load conditions. The survey measured motor input power. Drives are assumed to have an efficiency of 0.96 and pinion efficiency of 0.985, so the model shell power draw is converted to motor input power by dividing by 0.9456. The predicted power draw of '''Example''' project sample circuit number 7 (Fimiston) using sample '''MLE''', based on the KCGM paper published by Campbell, J. et al; 1998 AusIMM Annual Conference. |
| + | |||
{| class="wikitable" border="1" |
{| class="wikitable" border="1" |
||
|- |
|- |
||
| Line 22: | Line 23: | ||
! Total load,<br>%v/v |
! Total load,<br>%v/v |
||
! Pulp %solids,<br>w/w |
! Pulp %solids,<br>w/w |
||
| − | ! Morrell SAG Model,<br>kW at input/shell |
+ | ! Morrell SAG Model,<br>kW at input / ''shell'' |
|- |
|- |
||
| Survey 1 |
| Survey 1 |
||
| Line 30: | Line 31: | ||
| 21.6 |
| 21.6 |
||
| 65.9 |
| 65.9 |
||
| + | | '''9,268''' / ''8,764'' |
||
| − | | ''' |
||
|- |
|- |
||
| Survey 2 |
| Survey 2 |
||
| Line 38: | Line 39: | ||
| 25.2 |
| 25.2 |
||
| 63.3 |
| 63.3 |
||
| − | | '''10, |
+ | | '''10,481''' / ''9,911'' |
|- |
|- |
||
| Survey 3 |
| Survey 3 |
||
| Line 46: | Line 47: | ||
| 16.1 |
| 16.1 |
||
| 70 |
| 70 |
||
| + | | '''9,193''' / ''8,693'' |
||
| − | | |
||
|- |
|- |
||
| Survey 4 |
| Survey 4 |
||
| Line 54: | Line 55: | ||
| 13.5 |
| 13.5 |
||
| 60 |
| 60 |
||
| + | | '''7,766''' / ''7,344'' |
||
| − | | |
||
|- |
|- |
||
| Survey 5 |
| Survey 5 |
||
| Line 62: | Line 63: | ||
| 22.2 |
| 22.2 |
||
| 60 |
| 60 |
||
| + | | '''9,877''' / ''9,340'' |
||
| − | | |
||
|- |
|- |
||
| Survey 6 |
| Survey 6 |
||
| Line 70: | Line 71: | ||
| 13.6 |
| 13.6 |
||
| 63 |
| 63 |
||
| + | | '''7,394''' / ''6,992'' |
||
| − | | |
||
|- |
|- |
||
| Survey 7 |
| Survey 7 |
||
| Line 78: | Line 79: | ||
| 20 |
| 20 |
||
| 75 |
| 75 |
||
| + | | '''10,782''' / ''10,195'' |
||
| − | | |
||
|- |
|- |
||
| Survey 8 |
| Survey 8 |
||
| Line 86: | Line 87: | ||
| 28.6 |
| 28.6 |
||
| 75 |
| 75 |
||
| + | | '''11,415''' / ''10,794'' |
||
| − | | |
||
|- |
|- |
||
| Survey 9 |
| Survey 9 |
||
| Line 94: | Line 95: | ||
| 25.8 |
| 25.8 |
||
| 75 |
| 75 |
||
| + | | '''10,990''' / ''10,392'' |
||
| − | | |
||
|- |
|- |
||
| Survey 10 |
| Survey 10 |
||
| Line 102: | Line 103: | ||
| 19 |
| 19 |
||
| 75 |
| 75 |
||
| + | | '''9,655''' / ''9,130'' |
||
| − | | |
||
|} |
|} |
||
| + | The overall average difference between the model motor input predictions and the measurements are 3.4%, but range from -9.1% to 15.3%. |
||
| − | The predicted power draw of '''Example''' project sample circuit number 7 (Fimiston) using sample '''MLE''', based on the KCGM paper published by Campbell, J. et al; 1998 AusIMM Annual Conference. |
||
The SAG mill belly length reported can be achieved with a 16.5 degree head angle and 2.47 m trunnion diameter. The ball mill belly length can be achieved with a 18 degree head angle and 1.9 m trunnion diameter. |
The SAG mill belly length reported can be achieved with a 16.5 degree head angle and 2.47 m trunnion diameter. The ball mill belly length can be achieved with a 18 degree head angle and 1.9 m trunnion diameter. |
||
Revision as of 05:27, 11 November 2012
Contents
Bibliography: Benchmarking of models
The following list of references show data useful for benchmarking against the different models.
Benchmarking: Circuit Specific Energy Consumption
Benchmarking: Mill Power Draw
- Nelson, M; Valery, W; Morrell, S, Performance Characteristics and Optimisation of the Fimiston (KCGM) SAG Mill Circuit, Page 233 - 248, SAG 1996 Conference, Vancouver, Canada.
- Diameter inside shell = 10.970 m (36 ft)
- Diameter inside liners = 10.797 m (35.42 ft, 3.5 inch effective liner thickness)
- Belly length inside liners (EGL) = 4.417 m
- Centre-line length = 6.920 m
Table 4 presents results of several SAG surveys at different speed and load conditions. The survey measured motor input power. Drives are assumed to have an efficiency of 0.96 and pinion efficiency of 0.985, so the model shell power draw is converted to motor input power by dividing by 0.9456. The predicted power draw of Example project sample circuit number 7 (Fimiston) using sample MLE, based on the KCGM paper published by Campbell, J. et al; 1998 AusIMM Annual Conference.
| Survey | Survey Power, kW at input |
Mill speed, %critical |
Ball load, %v/v |
Total load, %v/v |
Pulp %solids, w/w |
Morrell SAG Model, kW at input / shell |
|---|---|---|---|---|---|---|
| Survey 1 | 9,255 | 72.5 | 13 | 21.6 | 65.9 | 9,268 / 8,764 |
| Survey 2 | 10,374 | 77 | 13 | 25.2 | 63.3 | 10,481 / 9,911 |
| Survey 3 | 8,395 | 75 | 15 | 16.1 | 70 | 9,193 / 8,693 |
| Survey 4 | 8,299 | 78 | 11.5 | 13.5 | 60 | 7,766 / 7,344 |
| Survey 5 | 10,976 | 80 | 11.5 | 22.2 | 60 | 9,877 / 9,340 |
| Survey 6 | 8,616 | 74 | 11.5 | 13.6 | 63 | 7,394 / 6,992 |
| Survey 7 | 11,684 | 82 | 14 | 20 | 75 | 10,782 / 10,195 |
| Survey 8 | 11,610 | 78 | 13 | 28.6 | 75 | 11,415 / 10,794 |
| Survey 9 | 11,571 | 78 | 13 | 25.8 | 75 | 10,990 / 10,392 |
| Survey 10 | 9,408 | 80 | 12 | 19 | 75 | 9,655 / 9,130 |
The overall average difference between the model motor input predictions and the measurements are 3.4%, but range from -9.1% to 15.3%.
The SAG mill belly length reported can be achieved with a 16.5 degree head angle and 2.47 m trunnion diameter. The ball mill belly length can be achieved with a 18 degree head angle and 1.9 m trunnion diameter.
Historic & Other Interesting Benchmarking
- Myers, J.F., Michaelson, S.D., Bond, F.C., Rod Milling—Plant and Laboratory Data, Technical Publication No. 2175, American Institute of Mining and Metallurgical Engineers, 1947. [1]
