Creating a circuit model - Revision history

Alex Doll: /* Choosing the right flowsheet */

2014-05-09T23:25:09Z

Choosing the right flowsheet

Alex Doll at 11:31, 8 April 2014

2014-04-08T11:31:49Z

Alex Doll: /* Choosing the right model */

2014-04-08T11:20:42Z

Choosing the right model

Alex Doll at 17:53, 12 December 2013

2013-12-12T17:53:24Z

Alex Doll at 23:31, 21 December 2012

2012-12-21T23:31:15Z

Alex Doll: Created page with "category:Howto ==Creating a Circuit Model== A circuit model is part of a project that matches grinding testwork to [[Specific energy co..."

2012-12-21T22:45:32Z

Created page with "category:Howto ==Creating a Circuit Model== A circuit model is part of a project that matches grinding testwork to [[Specific energy co..."

New page

[[category:Howto]]
==Creating a Circuit Model==
A circuit model is part of a [[Creating a project|project]] that matches grinding [[Testwork|testwork]] to [[Specific energy consumption models|circuit specific energy consumption models]] and [[Mill power draw models|mill power draw models]]. There are several types of circuit models available depending on the type of testwork and the nature of the grinding circuit being simulated.

===Steps in creating a circuit model===
From the main menu of the project you want to create a new circuit for,
# Identify an unused circuit number that you want to use for this new circuit. If there are no circuit numbers in use, then choose "1" to make this the first circuit.
# Create a new mill using [[Creating/modifying a mill|these instructions]]. Enter the new circuit number in the 'circuit number' field in the mill.
## Optional, continue adding mills (and pebble crushers) to the new circuit.

← Older revision		Revision as of 23:25, 9 May 2014
Line 61:		Line 61:
	For a single-stage ball mill circuit:		For a single-stage ball mill circuit:
	* Use the '''Bond/Rowland single stage ball mill model''' (requires Bond work index values for rod milling and ball milling)		* Use the '''Bond/Rowland single stage ball mill model''' (requires Bond work index values for rod milling and ball milling)
		+
		+	==Random instructions==
		+	When you switch back and forth between an '''Optimized Bond/Barratt SAB model''' and a '''Optimized Bond/Barratt SABC model''', and if you are using the default '''Essbm calibration factor''', then you must manually reset the calibration factor when you change the circuit type. If you are using a calibration factor determined by a mill survey, then the actual values you insert for this value should be based on the survey.
		+	* '''Optimized Bond/Barratt SABC model''' enter an Essbm calibration factor = 0.10
		+	* '''Optimized Bond/Barratt SAB model''' enter an Essbm calibration factor = 0.15

@@ Line 30: / Line 30: @@
 You must choose an appropriate circuit specific energy model from the drop-down list when creating or editing a circuit model.  Note that the list does <u>not validate</u> based on your mill selection.  Do not choose an "SABC" type circuit model if no crusher exists in the circuit.
 In general, the "Optimized Bond/Barratt" models are calibrated to copper porphyry projects in the Andes and western North America where the rocks are considered to be "low competency".  The model has also been checked against [[Benchmarking:_Specific_Energy_Consumption_Models|several gold mines]] and works well as long as the crushing work index is generally less than the rod and ball mill work index values.  Highly competent ores, where the crushing work index is greater than the rod and ball mill work indices, should use a "Raw Bond/Barratt" model {or the "SMC model" which will be added in the future}.
 For a SAG and ball mill circuit (flowsheet type '''SAB'''):

← Older revision		Revision as of 11:20, 8 April 2014
Line 30:		Line 30:

	You must choose an appropriate circuit specific energy model from the drop-down list when creating or editing a circuit model. Note that the list does <u>not validate</u> based on your mill selection. Do not choose an "SABC" type circuit model if no crusher exists in the circuit.		You must choose an appropriate circuit specific energy model from the drop-down list when creating or editing a circuit model. Note that the list does <u>not validate</u> based on your mill selection. Do not choose an "SABC" type circuit model if no crusher exists in the circuit.
		+
		+	In general, the "Optimized Bond/Barratt" models are calibrated to copper porphyry projects in the Andes and western North America where the rocks are considered to be "low competency". The model has also been checked against [[Benchmarking:_Specific_Energy_Consumption_Models\|several gold mines]] and works well as long as the crushing work index is generally less than the rod and ball mill work index values. Highly competent ores, where the crushing work index is greater than the rod and ball mill work indices, should use a "Raw Bond/Barratt" model {or the "SMC model" which will be added in the future}.

	For a SAG and ball mill circuit (flowsheet type '''SAB'''):		For a SAG and ball mill circuit (flowsheet type '''SAB'''):

@@ Line 1: / Line 1: @@
 [[category:Howto]]
 ==Creating a Circuit Model==
 A circuit model is part of a [[Creating a project|project]] that matches grinding [[Testwork|testwork]] to [[Specific energy consumption models|circuit specific energy consumption models]] and [[Mill power draw models|mill power draw models]].  There are several types of circuit models available depending on the type of testwork and the nature of the grinding circuit being simulated.
 ===Steps in creating a circuit model===
-[[file:BlankProject.png|thumb|alt=Screenshot of a new project|A blank main menu for a project]]
+[[file:CreateCircuit.png|thumb|alt=Screenshot of a creating a new circuit|Creating a new circuit]]
 From the main menu of the project you want to create a new circuit for,
 ===Choosing the right model===
 * Use the Morrell SMC SABC models if you have SMC Mi test results (Mia and Mib).
-For a SAG mill circuit (single-stage):
+For a SAG mill circuit (single-stage) (flowsheet type '''OCSAG''' or '''SSSAG'''):
-* Use the Bond/Barratt single-stage SAG model if you have Bond work index test results (requires ball mill work index, rod mill work index and impact crushing work index).
+* Use the '''Bond/Barratt single-stage SAG model''' if you have Bond work index test results (requires '''ball mill work index''', '''rod mill work index''' and '''impact crushing work index''').
 * Use the Morrell SMC single-stage SAG model if you have an SMC Mia test result.
-For a rod mill and ball mill circuit:
+For a rod mill and ball mill circuit [future model, not available yet]:
 * Use the Bond Rod/Ball model (requires Bond work index values for rod milling and ball milling)
 For a single-stage ball mill circuit:
-* Use the Bond/Rowland single stage ball mill model (requires Bond work index values for rod milling and ball milling)
+* Use the '''Bond/Rowland single stage ball mill model''' (requires Bond work index values for rod milling and ball milling)

@@ Line 4: / Line 4: @@
 ===Steps in creating a circuit model===
 From the main menu of the project you want to create a new circuit for,
 # Identify an unused circuit number that you want to use for this new circuit.  If there are no circuit numbers in use, then choose "1" to make this the first circuit.
 # Create a new mill using [[Creating/modifying a mill|these instructions]].  Enter the new circuit number in the 'circuit number' field in the mill.
-## Optional, continue adding mills (and pebble crushers) to the new circuit.
+#* Optional, continue adding mills (and pebble crushers) to the new circuit.[[file:CreateCircuit.png|thumb|alt=Screenshot of a creating a new circuit|The list of available circuit types for a new circuit]]