Benchmarking: Amelunxen SGI - Agnico Eagle - Revision history

Munashe Kurisa: /* Results */

2020-05-22T18:04:34Z

Results

2015-11-08T18:11:15Z

Results

2015-11-08T18:09:13Z

Results

2015-11-08T18:05:56Z

Discussion

2015-06-18T04:23:27Z

Design Criteria

2015-05-19T20:05:16Z

Discussion

2015-05-19T19:59:40Z

Results

2015-05-19T19:41:38Z

Modelling

2015-05-19T19:35:50Z

Results

2015-05-19T19:32:41Z

@@ Line 58: / Line 58: @@
 == Results ==
 Result for default Amelunxen SGI SAB model conditions:
 {| class="wikitable" border="1"
@@ Line 97: / Line 97: @@
 | model 7% low
 |}
 ==Discussion==

@@ Line 70: / Line 70: @@
 |-
 | Predicted
-| 6.6
+| 6.5
 | -
-| 7.0
+| 6.9
-| 13.6
+| 13.4
-| 193
+| 196
 |-
 | Survey
@@ Line 84: / Line 84: @@
 |-
 | Difference
-| 0.5
+| 0.4
 | -
-| 0.6
+| 0.5
-| 1.1
+| 0.9
-| 17
+| 14
 |-
 | Difference
-| model 8% high
+| model 7% high
 | -
-| model 9% high
+| model 8% high
-| model 9% high
+| model 7% high
-| model 9% low
+| model 7% low
 |}

@@ Line 70: / Line 70: @@
 |-
 | Predicted
-| 6.5
+| 6.6
 | -
-| 6.9
+| 7.0
-| 13.4
+| 13.6
-| 196
+| 193
 |-
 | Survey
@@ Line 84: / Line 84: @@
 |-
 | Difference
-| 0.4
+| 0.5
 | -
-| 0.5
+| 0.6
-| 0.9
+| 1.1
-| 14
+| 17
 |-
 | Difference
-| model 7% high
+| model 8% high
 | -
-| model 8% high
+| model 9% high
-| model 7% high
+| model 9% high
-| model 7% low
+| model 9% low
 |}
 [[file:Benchmarking-AgnicoEagle.png]]
 ==Discussion==

@@ Line 126: / Line 126: @@
 |-
 | Predicted
-| 6.1
+| 6.4
 | -
-| 6.5
+| 6.8
-| 12.6
+| 13.2
-| 209
+| 199
 |-
 | Survey
@@ Line 140: / Line 140: @@
 |-
 | Difference
-| 0.0
+| 0.3
 | -
-| 0.1
+| 0.4
-| 0.1
+| 0.7
-| 1
+| 11
 |-
 | Difference
 | -
-| model 1.5% high
+| model 6.3% high
-| model 0.8% high
+| model 5.6% high
-| model 0.5% low
+| model 5.5% low
 |}

@@ Line 25: / Line 25: @@
 ==Design Criteria==
-* SGI (actually SPI&tm;) of ore (Oct 1, 2000 to - April 30,2001); assumed to be the 25<sup>th</sup> percentile = 24 minutes.
+* SGI (actually SPI™) of ore (Oct 1, 2000 to - April 30,2001); assumed to be the 25<sup>th</sup> percentile = 24 minutes.
 * Wi<sub>BM</sub> assumed to be 10 kWh/tonne.
 * Plant availability = 94.4%

← Older revision		Revision as of 20:05, 19 May 2015
Line 111:		Line 111:

	The Starkey et al (2001) reference does not give a suitable range of ball mill work index values suitable for determining a 25<sup>th</sup> percentile. The operating work index is given as 12.3 kWh/t (13.0 kWh/t motor input basis). Back-calculating a CF<sub>ball</sub> value is not really possible with the data provided.		The Starkey et al (2001) reference does not give a suitable range of ball mill work index values suitable for determining a 25<sup>th</sup> percentile. The operating work index is given as 12.3 kWh/t (13.0 kWh/t motor input basis). Back-calculating a CF<sub>ball</sub> value is not really possible with the data provided.
		+
		+
		+	If the model is run with a manual CF<sub>SAG</sub> = 0.95, the following results are returned:
		+
		+	Result for Amelunxen SGI SAB model with CF<sub>SAG</sub> = 0.95
		+	{\| class="wikitable" border="1"
		+	\|-
		+	!
		+	!Esag
		+	!Epeb
		+	!Ebm
		+	!Etotal
		+	!t/h
		+	\|-
		+	\| Predicted
		+	\| 6.1
		+	\| -
		+	\| 6.5
		+	\| 12.6
		+	\| 209
		+	\|-
		+	\| Survey
		+	\| 6.1
		+	\| -
		+	\| 6.4
		+	\| 12.5
		+	\| 210
		+	\|-
		+	\| Difference
		+	\| 0.0
		+	\| -
		+	\| 0.1
		+	\| 0.1
		+	\| 1
		+	\|-
		+	\| Difference
		+	\| ''none''
		+	\| -
		+	\| model 1.5% high
		+	\| model 0.8% high
		+	\| model 0.5% low
		+	\|}

← Older revision		Revision as of 19:59, 19 May 2015
Line 99:		Line 99:

	[[file:Benchmarking-AgnicoEagle.png]]		[[file:Benchmarking-AgnicoEagle.png]]
		+
		+
		+	==Discussion==
		+	The calibration factor for SAG milling, CF<sub>SAG</sub>, is given in Amelunxen et al (2013) as:
		+	* 1.00 for "normal feed size with no pebble crushing",
		+	* 0.90 for "fine SAG feed"
		+	* 0.85 for "pebble crushing"
		+	* 0.77 for both "fine SAG feed" and "pebble crushing"
		+
		+	Back-calculating the CF<sub>SAG</sub> for Laronde ore gives 0.94, mid-way between "normal" and "fine" in the list above. Amelunxen et al (2013) do not actually reveal what the basis is for determining if an ore is "fine", but 100 mm could be on the cusp of being fine or coarse. In reality, the CF<sub>SAG</sub> factor should be a continuous and smooth function of feed size and not a step-change.
		+
		+	The Starkey et al (2001) reference does not give a suitable range of ball mill work index values suitable for determining a 25<sup>th</sup> percentile. The operating work index is given as 12.3 kWh/t (13.0 kWh/t motor input basis). Back-calculating a CF<sub>ball</sub> value is not really possible with the data provided.

@@ Line 52: / Line 52: @@
 * assume ore density 2.7 t/m³
 * effective dimensions 3186 mm diam × 5181 mm EGL
 == Results ==

← Older revision		Revision as of 19:35, 19 May 2015
Line 93:		Line 93:
	\| model 7% low		\| model 7% low
	\|}		\|}
		+
		+	[[file:Benchmarking-AgnicoEagle.png]]

@@ Line 7: / Line 7: @@
 Survey conducted shortly after start-up
 Actual operating data, table 7 from the reference
 * SAG circuit F<sub>80</sub> = 100 mm
 * transfer T<sub>80</sub> = 244 &micro;m
@@ Line 16: / Line 16: @@
 * SAG mill discharge % solids = 84% weight
 * SAG mill speed 8.59 RPM (53.4% of critical)
 (to achieve DCS power of 1350 kW requires 14% vol mill load)
-* ball mill power draw (sum of 2 mills, at motor input) = 1422 kW (at mill shell = 2 &times; 673 kW = 1346 kW)
+* ball mill power draw (sum of 2 mills, at motor input) = 1422 kW (at mill shell = 2 &times; 674 kW = 1348 kW)
 * ball mill % solids = 83% weight
-(to achieve 1422 kW, assume 30% vol mill charge, 17 RPM)
+(to achieve 1424 kW, assume 30% vol mill charge, 17 RPM)
-Design criteria
+==Design Criteria==
 * SGI (actually SPI&tm;) of ore (Oct 1, 2000 to - April 30,2001); assumed to be the 25<sup>th</sup> percentile = 24 minutes.
 * Wi<sub>BM</sub> assumed to be 10 kWh/tonne.
@@ Line 63: / Line 66: @@
 |-
 | Predicted
-| 5.48
+| 6.5
 | -
-| 5.77
+| 6.9
-| 11.24
+| 13.4
+| 196
 |-
 | Survey
+| 6.1
 | -
+| 6.4
+| 12.5
+| 210
 |-
 | Difference
+| 0.4
 | -
+| 0.5
+| 0.9
+| 14
 |-
 | Difference
 | -
 |}