Difference between revisions of "Benchmarking: Specific Energy Consumption Models"

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(→‎Benchmarking: Bond/Rowland SSBM Circuit Specific Energy Consumption - Boddington)
(→‎Benchmarking: Bond/Barratt SABC Circuit Specific Energy Consumption - Kanowna Belle)
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''Lunt, D.J., Thompson, A. and Ritchie, I.'' '''The Design and Operation of the Kanowna Belle Milling Circuit''', SAG 1996, Pages 81-96.
  
''Lunt, D.J., Thompson, A. and Ritchie, I.'' '''The Design and Operation of the Kanowna Belle Milling Circuit''', SAG 1996, Pages 81-96.
   
  +
{| class="wikitable"
−
Reported operating E<sub>total</sub>: 23.24 kWh/tonne
  
  +
|-
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Optimized model prediction E<sub>total</sub> of median sample: 24.55 kWh/t (5.6% high)
  
  +
! !! Survey !! Optimized<br>Model !! Difference !! Raw Model !! Difference
−
Raw model prediction E<sub>total</sub> of median sample: 29.06 kWh/t (25.0% high)
  
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|-
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| E<sub>SAG</sub> || 12.55 kWh/t || 13.27 kWh/t || +5.7% || 15.70 kWh/t || +25.1%
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|-
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| E<sub>ball</sub> || 9.70 kWh/t || 10.24 kWh/t || +5.6% || 12.12 kWh/t || +24.9%
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|-
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| E<sub>peb</sub> || 0.99 kWh/t || 1.04 kWh/t || +5.2% || 1.23 kWh/t || +24.5%
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|-
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| '''E<sub>total</sub>''' || '''23.24 kWh/t''' || '''24.55 kWh/t''' || '''+5.6%''' || '''29.05 kWh/t''' || '''+25.0%'''
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|}
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The ''Optimized Bond/Barratt SABC model'' better matches the survey than the'' Raw Bond/Barratt model''.
   
 
[[Benchmarking: Bond - Kanowna Belle|Show details of benchmarking]]
  
[[Benchmarking: Bond - Kanowna Belle|Show details of benchmarking]]

Revision as of 19:50, 27 May 2014

Benchmarking: Bond/Barratt Circuit Specific Energy Consumption - Copper Mountain

  • Morrison, R., Current Plant Conditions at Copper Mountain. Presentation to the BC/Yukon Branch Canadian Mineral Processors, November 29, 2012; Vancouver, Canada.

Result for default model conditions:

Tonnage
Model 1455 t/h
Measured 1600 t/h
Difference 145 t/h
Difference 9.5%


Show details of benchmarking

Benchmarking: Bond/Barratt Circuit Specific Energy Consumption - Fort Knox

  • Magnuson, R.; Hallow, J.; Mosher, J.; Major, K., The Fort Knox Mill: Design, Commissioning and Operation. Proceedings of the SAG 2001 Conference, Vancouver, Canada.

Result for default model conditions:

Etotal WiO Tonnage
Model 11.95 16.60 kWh/t 1,522 t/h
Measured 10.50 13.97 kWh/t 1,733 t/h
Difference 1.45 2.63 kWh/t 211 t/h
Difference 12.9% 17.2% 12.9%

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Benchmarking: Bond/Barratt Circuit Specific Energy Consumption - Meadowbank

  • Muteb, P. & Allaire, J., Meadowbank Mine Process Plant Throughput Increase, Proceedings of the Canadian Mineral Processors Annual General Meeting, Ottawa, Canada, January 2013.

Paper describes a "sick" SAG mill and the changes made to "bring it to health". The "healthy" mill conditions benchmark as follows:

  • Actual SAG/ball motor powers (at shell): 3,168 kW / 4,105 kW
  • Actual daily average throughput: 500 tonnes/hour
  • Predicted SAG/ball motor powers (at shell): 3,096 kW / 4,182 kW
  • Predicted nominal throughput: 500 tonnes/hour (0% difference)
SAG Ball Mill total
Measured specific energy consumption, kWh/t 6.34 8.21 14.55
Predicted specific energy consumption, kWh/t 6.19 8.36 14.55
Difference, kWh/t -0.15 0.15 0.00
Difference, % -2.3% 1.8% 0.0%

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Benchmarking: Bond/Barratt Circuit Specific Energy Consumption - Santa Rita

Latchireddi, S. & Faria, E., Achievement of High Energy Efficiency in Grinding Mills at Santa Rita, Proceedings of the Canadian Mineral Processors Annual General Meeting, Ottawa, Canada, January 2013.

Faria, E. & Latchireddi, S., Commissioning and Operation of Milling Circuit at Santa Rita Nickel Operation, Paper #137: Proceedings of the International Autogenous Grinding, Semiautogenous Grinding and High Pressure Grinding Roll Technology Conference, Vancouver, Canada, September 2011.

FAG BM Pebble
Crusher		 total
Measured specific energy consumption, kWh/t 9.55 7.28 0.34 17.18
Predicted specific energy consumption, kWh/t 9.78 8.33 0.39 18.50
Difference, kWh/t 0.23 1.05 0.05 1.32
Difference, % 2.4% 14.4% 14.7% 7.7%

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Benchmarking: Bond/Barratt Circuit Specific Energy Consumption - Macraes

Barns, K., Lane, G., Osten, K. & Scagliotta, N., Benchmarking Energy Efficiency - A Case Study at Macraes Gold Mine, Proceedings of the AusIMM MetPlant conference, Perth, Australia, September 2004.

Difference between model results and plant surveys:

Survey 5 Survey 4 Survey 3 Survey 2 Survey 1 Overall
Average
SAG specific power -5.3% -5.0% 6.3% 0.5% 2.2% -0.2%
ball mill specific power -6.3% -4.7% 3.6% 1.9% 3.2% -0.5%
total specific power -6.8% -3.8% 5.4% 1.4% 2.9% -0.2%

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Benchmarking: Bond/Rowland SSBM Circuit Specific Energy Consumption - Boddington

The Bond/Rowland SSBM model was fit to the observed operation of the Boddington HPGR circuit. The fitting parameters are:

  • Essbm calibration factor: (-0.13)
  • Mechanical efficiency of HPGR crushers: 0.28.

Because the model is specifically fit to the Boddington data, it doesn't make any meaningful throughput predictions, but the following predictions are available:

  • Ball mill operating work index reduction versus laboratory: 5% (microcracking/phantom cyclone effect)
  • Secondary crusher WiO is 18.1 kWh/tonne (versus laboratory determination 27.7 kWh/t).

Show details of benchmarking

Benchmarking: Bond/Barratt SABC Circuit Specific Energy Consumption - Kanowna Belle

Lunt, D.J., Thompson, A. and Ritchie, I. The Design and Operation of the Kanowna Belle Milling Circuit, SAG 1996, Pages 81-96.

Survey Optimized
Model		 Difference Raw Model Difference
ESAG 12.55 kWh/t 13.27 kWh/t +5.7% 15.70 kWh/t +25.1%
Eball 9.70 kWh/t 10.24 kWh/t +5.6% 12.12 kWh/t +24.9%
Epeb 0.99 kWh/t 1.04 kWh/t +5.2% 1.23 kWh/t +24.5%
Etotal 23.24 kWh/t 24.55 kWh/t +5.6% 29.05 kWh/t +25.0%

The Optimized Bond/Barratt SABC model better matches the survey than the Raw Bond/Barratt model.

Show details of benchmarking

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