Benchmarking: Meadowbank ball mill model - Revision history

Alex Doll: /* Benchmarking: Ball Mill Power Draw - Meadowbank */

2014-01-26T18:02:24Z

Benchmarking: Ball Mill Power Draw - Meadowbank

← Older revision		Revision as of 18:02, 26 January 2014
Line 27:		Line 27:
	! Mill filling		! Mill filling
	! Morrell Model, kW		! Morrell Model, kW
⚫	! Nordberg model, kW
⚫	density correction
	! Nordberg model, kW		! Nordberg model, kW
	no density correction		no density correction
		⚫	! Nordberg model, kW
		⚫	density correction
	\|-		\|-
	\| May 2012		\| May 2012
Line 36:		Line 36:
	\| 30.6% v/v		\| 30.6% v/v
	\| 4,765 (+9.3%)		\| 4,765 (+9.3%)
⚫	\| 4,753 (+9.5%)
	\| 4,426 (+1.9%)		\| 4,426 (+1.9%)
		⚫	\| 4,753 (+9.5%)
	\|}		\|}

Alex Doll: /* Benchmarking: Ball Mill Power Draw - Meadowbank */

2014-01-26T17:49:24Z

Benchmarking: Ball Mill Power Draw - Meadowbank

← Older revision		Revision as of 17:49, 26 January 2014
Line 28:		Line 28:
	! Morrell Model, kW		! Morrell Model, kW
	! Nordberg model, kW		! Nordberg model, kW
			density correction
			! Nordberg model, kW
			no density correction
	\|-		\|-
	\| May 2012		\| May 2012
Line 33:		Line 36:
	\| 30.6% v/v		\| 30.6% v/v
	\| 4,765 (+9.3%)		\| 4,765 (+9.3%)
	\| 4,~~423~~ (+1.9%)		\| 4,753 (+9.5%)
			\| 4,426 (+1.9%)
	\|}		\|}

Alex Doll: Created page with "category:Benchmarking category:Bibliography ==Benchmarking: Ball Mill Power Draw - Meadowbank== * ''Muteb, P. & Allaire, J.'', '''Meadowbank Mine Process Plant Throug..."

2013-01-26T23:39:52Z

Created page with "category:Benchmarking category:Bibliography ==Benchmarking: Ball Mill Power Draw - Meadowbank== * ''Muteb, P. & Allaire, J.'', '''Meadowbank Mine Process Plant Throug..."

New page

[[category:Benchmarking]]
[[category:Bibliography]]
==Benchmarking: Ball Mill Power Draw - Meadowbank==

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

The ball mill design given as:
* Diameter inside shell: 18 ft
* Length (assumed to be flange-to-flange length): 29 ft
* Effective grinding length: 28.5 ft (using rule-of-thumb half-foot basis)
* Motor size: 6,000 horsepower (4,474 kW)
* Overflow mill with synchronous motor assumed

The operating conditions of the May 2012 survey, including the pre-crushing circuit given as:
* Mill speed 14.19 rpm (75% critical)
* Volumetric filling 30.6% v/v
* Ball charge 30.6% v/v
* Ore density 2.93 kg/L
* Grindability: A×b 38.6; Wi<sub>BM</sub> 10.9 kWh/t

Liners assumed to be an effective thickness of 3 inches. DCS power is assumed to be indicated (mill power measurements × 0.985 pinion × 0.96 motor eff equals power "at mill shell"). Model power measurements are shown "at DCS".

{| class="wikitable" border="1"
|-
!
! DCS Power, kW
! Mill filling
! Morrell Model, kW
! Nordberg model, kW
|-
| May 2012
| 4,341
| 30.6% v/v
| 4,765 (+9.3%)
| 4,423 (+1.9%)
|}