Template:SysCAD (Page, Ball Mill, Perfect Mixing, Mill): Difference between revisions

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m (Text replacement - "Ball(\rho_{\rm S})" to "BallSG")
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! colspan="3" style="text-align:left;" |''Requirements''
! colspan="3" style="text-align:left;" |''Requirements''
|- style="vertical-align:top;"
{{SysCAD (Text, NumParallelUnits)}}
|NumParallelUnits
|Input
|The number of parallel, identical units to simulate:
* Feed is divided by the number of parallel units before being sent to the unit model.
* Unit model product is multiplied back by the same value and returned to the SysCAD product stream.
* All unit model result values are shown per parallel unit.
{{#switch: {{{method|}}}  
{{#switch: {{{method|}}}  
   | 1 =  
   | 1 =  
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{{!}} rowspan="2" {{!}} Mode
{{!}} rowspan="2" {{!}} Mode
{{!}} Steady State
{{!}} Steady State
{{!}} The [[Ball Mill (Perfect Mixing)|steady-state Perfect Mixing ball mill model]] is used in SysCAD Dynamic simulation mode used instead of the dynamic Perfect Mixing model described here. This approach may be useful when very large SysCAD step sizes are used and steady-state operation can be assumed between each time step.
{{!}}
* The [[Ball Mill (Perfect Mixing)|steady-state Perfect Mixing ball mill model]] is used in SysCAD Dynamic simulation mode used instead of the dynamic Perfect Mixing model described here.  
* This approach may be useful when very large SysCAD step sizes are used and steady-state operation can be assumed between each time step.
{{!}}- style="vertical-align:top;"
{{!}}- style="vertical-align:top;"
{{!}} Dynamic
{{!}} Dynamic
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{{!}}- style="vertical-align:top;"
{{!}}- style="vertical-align:top;"
{{!}} Overflow (User)
{{!}} Overflow (User)
{{!}} The ball mill is configured with an overflow discharge. The user specifies the maximum slurry volume before overlow.
{{!}} The ball mill is configured with an overflow discharge. The user specifies the maximum slurry volume before overflow.
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}}
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|- style="vertical-align:top;"
|MediaStringsP50
|CheckBox
|
* Only visible if the ''MediaStrings'' option is checked.
* Replaces the ''BallSize.Sim'' user defined value with the ''MediaSize'' (All) value from the [[Tumbling Mill (Media Strings)|MediaStrings]] page.
* The value of ''BallSize.Orig'' should be determined on the same basis for correct scaling of a changed media charge.
|-
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! colspan="3" style="text-align:left;" |''Scaling''
! colspan="3" style="text-align:left;" |''Ball''
|-
|-
|Diameter
|Diameter
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|Bond Ball Work Index of ore in the original mill.
|Bond Ball Work Index of ore in the original mill.
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|-
|BallTopSize
|BallSize
|Input
|Input
|Diameter of new balls added to the original and simulated ball mills.
|Characteristic diameter of balls in original and simulated ball mills.
|-
|-
|MaxBreakageRateFactor / K
|MaxBreakageRateFactor / K

Revision as of 05:56, 2 March 2023

Mill page

The Mill page is used to specify the input parameters for the mill model.

Tag (Long/Short) Input / Display Description/Calculated Variables/Options
PerfectMixing
HelpLink ButtonModelHelp.png Opens a link to this page using the system default web browser. Note: Internet access is required.
Requirements
NumParallelUnits Input The number of parallel, identical units to simulate:
  • Feed is divided by the number of parallel units before being sent to the unit model.
  • Unit model product is multiplied back by the same value and returned to the SysCAD product stream.
  • All unit model result values are shown per parallel unit.
MediaStringsP50 CheckBox
  • Only visible if the MediaStrings option is checked.
  • Replaces the BallSize.Sim user defined value with the MediaSize (All) value from the MediaStrings page.
  • The value of BallSize.Orig should be determined on the same basis for correct scaling of a changed media charge.
Ball
Diameter Input The inside liner diameter of the original and simulated ball mills.
BellyLength Input The inside liner belly length of the simulated ball mill, excluding cones.
ConeAngle Input Angle of the feed and discharge end cones, measured as positive displacement from the vertical direction.
Diameter Input The inside liner trunnion diameter of the simulated ball mill.
LoadFrac Input The volumetric load fraction of the original and simulated ball mills.
FracCS Input The fraction critical speed of the original and simulated ball mills.
WorkIndex Input Bond Ball Work Index of ore in the original mill.
BallSize Input Characteristic diameter of balls in original and simulated ball mills.
MaxBreakageRateFactor / K Input Parameter relating ball size and the size at which the breakage rate per discharge rate is maximum.
R/DFunction
NumSplineKnots Input Number of spline knots for the function.
Size Input Spline knot size positions.
Ln(R/D*) Input Values of at each spline knot position.
Power
BallVolume Input Volumetric fraction of mill occupied by balls and voids.
VoidFillFraction Input Volumetric fraction of void space between balls occupied by slurry.
BallSG Input Specific Gravity or density of ball media.
Results
MillVolume Display Volume inside mill, including cones.
MillSpeed Display Rotational speed of simulated mill.
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