Model:Morrell Mi SMC SAG - Revision history

Alex Doll: /* Optional parameters */

2023-08-30T14:56:17Z

Optional parameters

2023-08-30T14:54:56Z

Morrell Mi (SMC) SAG & ball mill Model

2021-03-23T17:33:06Z

Formulae

2021-03-22T19:14:37Z

Formulae

2021-03-22T19:12:27Z

Formulae

2021-01-07T22:10:08Z

Optional parameters

2020-10-17T20:55:55Z

Optional parameters

2020-03-06T21:03:57Z

2020-03-06T21:02:32Z

Morrell SMC SAG & ball mill Model

2016-04-11T17:19:35Z

Formulae

@@ Line 23: / Line 23: @@
 ===Optional parameters===
 * '''Description''' and '''Comment''' are optional text fields
-* '''Maximum t/h limit''' is a t/h throughput above which a warning message is displayed (but does not actually limit the throughput).
+* '''Maximum t/h limit''' is a t/h throughput above which the SAG and ball mills will turn down by, for example, grinding out.
 * '''T<sub>80</sub> min''' and '''T<sub>80</sub> min''' override the transfer size restrictions built into the model
 * [[Ball mill work index adjustment]] used to adjust Wi<sub>BM</sub> for different P<sub>80</sub> sizes.

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 ===Testwork Required===
 * [[Testwork: Drop weight test|The SMC™ test]], stored in the "DWT" testwork table (SMC is a Drop Weight Test).
-* [[Testwork: Bond ball mill work index|Bond ball mill work index]].  The method requires '''all the elements''' of the ball mill work index test to be filled in:
+* [[Testwork: Bond ball mill work index|Bond ball mill work index]].  The method requires '''all the following elements''' of the ball mill work index test to be filled in:
 ** Ball mill Wi test closing screen size, ''umclosing'', µm
 ** Ball mill Wi test product size, ''P<sub>80</sub>'', µm

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 </math><sup>[[Bibliography:_Specific_energy_consumption_models|Morrell, 2004]]</sup>
-<math>E_{SAG} = 4 \times Mia \left( P_{80}^{f(T_{80})} - F_{80}^{f(F_{80})} \right) \times CFsag
+<math>E_{SAG} = 4 \times Mia \left( T_{80}^{f(T_{80})} - F_{80}^{f(F_{80})} \right) \times CFsag
 </math><sup>[[Bibliography:_Specific_energy_consumption_models|based on Doll 2013, but note Morrell, 2011]]</sup>

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 </math><sup>[[Bibliography:_Specific_energy_consumption_models|Morrell, 2004]]</sup>
-SABC circuit: <math>E_{total} = 4 \times Mia \left( 750^{f(750)} - F_{80}^{f(F_{80})} \right) \times 0.95 + 4 \times Mib \left( P_{80}^{f(P_{80})} - 750^{f(750)} \right)
+SABC circuit: <math>E_{total} = 4 \times Mia \left( 750^{f(750)} - F_{80}^{f(F_{80})} \right) \times 0.95 \times CFsag + 4 \times Mib \left( P_{80}^{f(P_{80})} - 750^{f(750)} \right) \times CFball
 + 4 \times Mic \left( CSS^{f(CSS)} - PEB^{f(PEB)} \times \text{fract circulating load} \right)
 </math><sup>[[Bibliography:_Specific_energy_consumption_models|Morrell, 2004]]</sup>

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 Where ''x'' is the particle 80% passing size in µm.
-SAB circuit: <math>E_{total} = 4 \times Mia \left( 750^{f(750)} - F_{80}^{f(F_{80})} \right) \times 1.00 + 4 \times Mib \left( P_{80}^{f(P_{80})} - 750^{f(750)} \right)
+SAB circuit: <math>E_{total} = 4 \times Mia \left( 750^{f(750)} - F_{80}^{f(F_{80})} \right) \times 1.00 \times CFsag + 4 \times Mib \left( P_{80}^{f(P_{80})} - 750^{f(750)} \right) \times CFball
 </math><sup>[[Bibliography:_Specific_energy_consumption_models|Morrell, 2004]]</sup>

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 * [[Ball mill work index adjustment]] used to adjust Wi<sub>BM</sub> for different P<sub>80</sub> sizes.
 ** '''coefficient (a)''', the fitted coefficient to the adjustment equation
-* '''CFsag calibration factor''', model tuning factor for E<sub>ASAG</sub>
+* '''CFball calibration factor''', model tuning factor for "W_b" fine component of E<sub>total</sub>
 ===Formulae===

@@ Line 2: / Line 2: @@
 [[category:Specific Energy Models]]
 [[Category:SMC Model]]
-== Morrell SMC SAG & ball mill Model ==
+== Morrell Mi (SMC) SAG & ball mill Model ==
 This is a SAG or AG mill plus ball mill model that estimates the specific energy consumption (E<sub>SAG</sub>) using the equations of Morrell (2004).

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 * fraction of circulating load = 0.15
 * pebble crusher CSS (P<sub>80</sub>) = 12.5 mm
-* pebble dimension (F<sub>80</sub>) = 25 mm
+* pebble dimension (F<sub>80</sub>) = 35 mm
 ===CF<sub>sag</sub> calibration factor===