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[https://www.sagmilling.com SAGMILLING.COM] Wiki.
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Theory and equations for power based modelling of mineral comminution circuits.
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[[file:CC88x31.png]] This work is licensed under a [http://creativecommons.org/licenses/by/4.0/|Creative Commons Attribution 4.0 International License].
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== Grinding Circuit Modelling Documentation ==
  
== Grinding Circuit Modelling Documentation ==
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This documentation describes the operating and underlying mathematics of the SAGMILLING.COM grinding circuit modelling program.
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This documentation describes the operating and underlying mathematics of the [https://www.sagmilling.com SAGMILLING.COM] grinding circuit modelling program.
 
It is intended to be used by the model users who want to operate and understand the functioning of grinding models.
  
It is intended to be used by the model users who want to operate and understand the functioning of grinding models.
   
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Quick start video to get familiar with the operation of the software is available from here: https://youtu.be/J5XbCEJ6-sE
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== Generic Background Information ==
  
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* Theory of power models
  
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== Operating the Software ==
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* Model types: [[Specific_energy_consumption_models|specific energy consumption models]] and [[Mill power draw models|mill power draw]]
  
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* [[General concepts]]
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* Testwork and test types
  
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** [[Testwork: Aggregating samples|Detailed concepts - Aggregating sample testwork]]
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* Size does matter
  
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** [[Detailed concepts - Intellectual Property]]
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* [[Entering test results]]
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** [[Testwork Program]]
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** [[How to use the Litho table|How to declare new Sample Names]]
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* [[Creating a circuit model]]
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** [[Modelling: Transfer size limits]]
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* [[Creating/modifying a mill]]
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* [[How to show a sub-set of results]]
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* [[How to copy data]] out of a table and into a spreadsheet
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* [[How to design a new circuit]] using grindability testing
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* [[How to make temporary changes]] to models or grindability test data and without saving
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* Design choices: [[HPGR or SAG?]]
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* Design choices: [[Pebble crushing or not?]]
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* Design implications of [[Modelling: Transfer size limits|Transfer Size]]
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== Specific Energy Models ==
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* [[:Category:Models|Theory of power models]]
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* All Model types: [[Specific_energy_consumption_models|specific energy consumption models]]
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* SAG and ball mill circuit models
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** [[Model:Raw Bond/Barratt SAB & SABC Model|Raw Bond/Barratt SAB & SABC model]]
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** Optimized Bond/Barratt Models (including [[phantom cyclone]] allowance)
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*** [[Model:Bond/Barratt SABC Models|Optimized Bond/Barratt model SABC]] (pebble crushing)
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*** [[Model:Bond/Barratt SAB Model|Optimized Bond/Barratt model SAB]] (pebble recycle)
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** [[Model:Amelunxen SGI|Amelunxen SAG Grindability Index (SGI) SAB and SABC model]] (similar to SPI™)
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** [[Model:Morrell Mi SMC SAG|Morrell Mi (SMC) SAG & ball mill model]]
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* Single-stage SAG milling models
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** [[Model:Bond/Barratt SS SAG|Bond/Barratt Single stage SAG milling model]]
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** [[Model:Morrell SS SAG|Morrell Mi (SMC) Single stage SAG milling model]]
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** [[Model:El Soldado SS SAG|El Soldado (SGI) Single stage SAG milling model]]
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* Rod mill and ball mill circuit models
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** [[Model:Bond RMBM Model|Bond/Rowland rod mill & ball mill model]]
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* Multi-stage crushing and ball milling models
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** [[Model:Bond-Rowland SSBM|Bond/Rowland multi-stage crushing and single-stage ball mill model]]
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** [[Model:Morrell SSBM|Morrell multi-stage crushing and single-stage ball mill model]]
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** [[Model:Bond HPGR and ball mill|Bond HPGR and ball mill model]] (using work indices) warning, experimental!
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** [[Model:Morrell HPGR and ball mill|Morrell HPGR and ball mill model]]
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* [[:Category:Monte_Carlo|Monte Carlo simulations]]
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== Mill power draw models==
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* [[Measurement of power]] (motor input versus shell, etc.)
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* [[Media density]] for rods and balls
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* Model types: [[Mill power draw models|mill power draw]]
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** [[Austin SAG model]] (hybrid phenomenological and empirical model)
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** [[Morrell C-model]] for SAG & ball mills (phenomenological model with empirical fitting). Sub-divided into:
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*** a ''simplified'' model with 'typical' defaults and
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*** a ''full'' model with all parameters editable.
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** [[Loveday/Barratt SAG model]] (uses an internal table of empirical "Power Numbers")
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** [[Nordberg ball mill model]] (largely empirical model)
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** [[Nordberg ball mill model|Nordberg rod mill model]] (largely empirical model)
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** [[Crusher model|Crusher model]] (power allowance)
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==Laboratory testwork==
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* Comminution [[Testwork]] and test types performed in a laboratory
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** [[Conversions between test types]]
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** [[Ball mill work index adjustment]] parameters, also adjustments for Morrell Mib
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{{Testwork-listing}}
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* Particle [[size does matter]]
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* [[Planning a test program]] for a project that does not have any testing performed yet
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== Monte Carlo Simulations ==
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Simulations that use a statistical range of results rather than actual test work results. In general, the users specifies test results as a mean and a standard deviation and the model generates random work index results from a suitable Gaussian distribution. Highly recommended to operate Monte Carlo simulations in a different project from normal simulations and not to mix laboratory work index results with Monte Carlo simulation inputs.
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* [[:Category:Monte_Carlo|Monte Carlo simulations]]
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** [[Bond/Barratt Monte Carlo simulations]]
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== Administrator functions ==
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Only people with administrator privilege are able to create new projects and designate new users. Each Client organization has at least one administrator.
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* [[:Category:Administration|General administration concepts]]
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* [[Admin:User IDs|About user IDs]]
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* [[Admin:Add User|Add a user]]
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* [[Creating a project|Add a project]]
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* [[Admin:Assign user to a project|Assign users to a project]]
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* [[Admin:Add Lab|Add a laboratory]] to the testwork drop-down menu
   
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== Operating the Model ==
  
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* General concepts
  
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* Creating a project
  
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* Entering test results
  
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* Creating a model
  
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* Creating/modifying a mill
  
   
 
{{Bibliography}}
  
{{Bibliography}}
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== Index ==
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{{Special:Categories}}
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[[Software change log]]
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* [[Software change log#Bug list|Known Bug list]]

Latest revision as of 16:12, 30 August 2023

SAGMILLING.COM Wiki. Theory and equations for power based modelling of mineral comminution circuits.

CC88x31.png This work is licensed under a Commons Attribution 4.0 International License.

Grinding Circuit Modelling Documentation

This documentation describes the operating and underlying mathematics of the SAGMILLING.COM grinding circuit modelling program. It is intended to be used by the model users who want to operate and understand the functioning of grinding models.

Quick start video to get familiar with the operation of the software is available from here: https://youtu.be/J5XbCEJ6-sE

Operating the Software

Specific Energy Models

Mill power draw models

Laboratory testwork

Laboratory tests of grindability, impact, abrasion and compression.

  • wibm: Bond ball mill work index (sometimes called "BWI")
  • wirm: Bond rod mill work index (sometimes called "RWI")
  • wic: Bond crushing work index (low energy impact, sometimes called "LEIT", "IWI" or "CWI")
  • dwt: Drop Weight tests, SMC Test ® of SMCC Pty Ltd. and JK DWT (values stored include A×b and DWI)
  • sgi: SAG Grindbility Index (also SAG Power Index™ or SPI™ of SGS Mineral Services; originally called a "Starkey SAG test"Starkey et al, 1994)
  • ai: Bond abrasion index
  • ucs: Unconfined Compressive Strength, a detailed geotechnical test conducted on drill core
  • pli: Point Load Index, a field-test conducted on drill core

Geological tables, used for organizing and partitioning samples, or as proxies for test results.

  • litho: Lithological, alteration and sample acquisition data, including drill hole intervals

Automatically generated tables. Assembled by the program out of the tests entered into the laboratory test tables.

  • Testwork summary: Summarizes all the test results entered for a project, including samples with inadequate information for modelling.


Extra table, accessible to your administrators

  • Laboratory Listing: Listing of laboratories and their colour schemes for plotting results.

Monte Carlo Simulations

Simulations that use a statistical range of results rather than actual test work results. In general, the users specifies test results as a mean and a standard deviation and the model generates random work index results from a suitable Gaussian distribution. Highly recommended to operate Monte Carlo simulations in a different project from normal simulations and not to mix laboratory work index results with Monte Carlo simulation inputs.

Administrator functions

Only people with administrator privilege are able to create new projects and designate new users. Each Client organization has at least one administrator.

Benchmarking

Examples of how the SAGMILLING.COM model compare to published information for actual milling circuits.

Bibliography

Index

Special:Categories

Software change log

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