Jig (King)

Description

This article describes a model for the equilibrium stratification of particles in autogenous media gravity concentration devices such as jigs. The original model formulation is outlined by King (2012) and extensions for particle size effects are proposed by Rao (2007).

Model theory

The stratification model describes the equilibrium vertical distribution of particles in a jig bed. The formulation follows the density stratification model of King (2012), in which density-driven segregation is opposed by dispersive mixing.

The particle-size extension proposed by Rao (2007) is used to represent bivariate size-density feed distributions.

Stratification model

The variation of the volumetric concentration of each density class with bed height is described by:

[math]\displaystyle{ \frac{dC_j(h)}{dh}=\alpha\,C_j(h)\left(\rho_j-\bar{\rho}(h)\right) }[/math]

where:

• [math]\displaystyle{ C_j(h) }[/math] is the volumetric concentration of density class [math]\displaystyle{ j }[/math] at relative bed height [math]\displaystyle{ h }[/math] (v/v)
• [math]\displaystyle{ h }[/math] is the relative bed height measured from the bottom of the bed (m/m)
• [math]\displaystyle{ \alpha }[/math] is the stratification constant (-)
• [math]\displaystyle{ \rho_j }[/math] is the particle density of density class [math]\displaystyle{ j }[/math] (t/m³)
• [math]\displaystyle{ \bar{\rho}(h) }[/math] is the mean density of the bed at height [math]\displaystyle{ h }[/math] (t/m³)
• [math]\displaystyle{ m }[/math] is the number of density classes

The mean density of the bed at each height is calculated from the local composition as:

[math]\displaystyle{ \bar{\rho}(h)=\sum_{j=1}^{m} C_j(h)\rho_j }[/math]

The differential relation alone does not uniquely determine the concentration profiles, and additional constraints must therefore be imposed.

The concentrations represent the volumetric composition of the solids present at each bed height, and therefore must satisfy the condition:

[math]\displaystyle{ \sum_{j=1}^{m} C_j(h)=1 }[/math]

The concentration profiles must also reproduce the known feed composition of each density class, which imposes the constraint:

[math]\displaystyle{ {C_j}^{\rm f}=\int_0^1 C_j(h)\,dh }[/math]

where [math]\displaystyle{ {C_j}^{\rm f} }[/math] is the feed volumetric concentration of density class [math]\displaystyle{ j }[/math] (v/v).

The concentration profiles [math]\displaystyle{ C_j(h) }[/math] are obtained numerically such that the differential stratification relation and the composition constraints defined above are satisfied over the bed height.

Extension to particle size distribution

The stratification formulation described above is extended to bivariate size-density feed distributions by writing the relation for each size-density fraction as:

[math]\displaystyle{ \frac{dC_{ij}(h)}{dh}=\alpha_i\,C_{ij}(h)\left(\rho_{ij}-\bar{\rho}(h)\right) }[/math]

where:

• [math]\displaystyle{ C_{ij}(h) }[/math] is the volumetric concentration of particles of size class [math]\displaystyle{ i }[/math] and density class [math]\displaystyle{ j }[/math] at height [math]\displaystyle{ h }[/math] (v/v)
• [math]\displaystyle{ \alpha_i }[/math] is the stratification constant for size class [math]\displaystyle{ i }[/math] (-)
• [math]\displaystyle{ \rho_{ij} }[/math] is the particle density of component [math]\displaystyle{ ij }[/math] (t/m³)
• [math]\displaystyle{ n }[/math] is the number of particle size intervals

The size dependence of the stratification constant is expressed as:

[math]\displaystyle{ \alpha_i=A\,{\bar d_i}^{b} }[/math]

where:

• [math]\displaystyle{ A }[/math] is the stratification coefficient
• [math]\displaystyle{ b }[/math] is the size exponent (-)
• [math]\displaystyle{ \bar d_i }[/math] is the geometric mean size of particles in size interval [math]\displaystyle{ i }[/math] (mm)

When [math]\displaystyle{ b=0 }[/math], the formulation reduces to King's monosize density stratification model.

The mean bed density is calculated from the local size-density composition as:

[math]\displaystyle{ \bar{\rho}(h)=\sum_{i=1}^{n}\sum_{j=1}^{m} C_{ij}(h)\rho_{ij} }[/math]

As for the monosize formulation, the differential relation alone does not uniquely determine the concentration profiles.

The bed composition therefore satisfies:

[math]\displaystyle{ \sum_{i=1}^{n}\sum_{j=1}^{m} C_{ij}(h)=1 }[/math]

and the concentration profiles must reproduce the known feed composition:

[math]\displaystyle{ {C_{ij}}^{\rm f}=\int_0^1 C_{ij}(h)\,dh }[/math]

where [math]\displaystyle{ {C_{ij}}^{\rm f} }[/math] is the feed volumetric concentration of component [math]\displaystyle{ ij }[/math] (v/v).

The profiles [math]\displaystyle{ C_{ij}(h) }[/math] are again obtained numerically such that the differential stratification relation and the composition constraints above are satisfied over the bed height.

Bed slicing and product recovery

Products are recovered by separating the stratified bed at a cut height [math]\displaystyle{ h_s }[/math], measured relative to the bed height. In practice this height is determined by the operating conditions of the jig, typically through control of the product bed level and overflow.

The volumetric concentration of component [math]\displaystyle{ ij }[/math] reporting to the concentrate product is obtained by integrating the concentration profile below the cut height:

[math]\displaystyle{ {C_{ij}}^{\rm p}=\int_0^{h_s} C_{ij}(h)\,dh }[/math]

where [math]\displaystyle{ {C_{ij}}^{\rm p} }[/math] is the volumetric concentration of component [math]\displaystyle{ ij }[/math] in the concentrate product (v/v).

The yield to the concentrate product, [math]\displaystyle{ Y(h_s) }[/math] (frac), is then:

[math]\displaystyle{ Y(h_s)=\sum_{i=1}^{n}\sum_{j=1}^{m} {C_{ij}}^{\rm p} }[/math]

The recovery of each size-density fraction to the concentrate product, [math]\displaystyle{ R_{ij}(h_s) }[/math] (frac), is:

[math]\displaystyle{ R_{ij}(h_s)=\frac{{C_{ij}}^{\rm p}}{{C_{ij}}^{\rm f}} }[/math]

The tailings product is given by the fraction of material not recovered to the concentrate product.

Continuous jigging

The preceding formulation represents a static stratified bed. For continuous jigging operation, particle transport along the jig may be represented by a velocity profile that varies with bed height, [math]\displaystyle{ v(h) }[/math]. The function [math]\displaystyle{ v(h) }[/math] represents the dimensionless axial velocity of particles at height [math]\displaystyle{ h }[/math] (-).

A simple exponential form for the velocity profile is:

[math]\displaystyle{ v(h)=\exp(\kappa h) }[/math]

where [math]\displaystyle{ \kappa }[/math] is the velocity profile parameter (-).

For continuous operation, the product quantities are evaluated from the velocity-weighted concentration distribution across the bed height:

[math]\displaystyle{ {C_{ij}}^{\rm p}=\frac{\int_0^{h_s} v(h)\,C_{ij}(h)\,dh}{\int_0^1 v(h)\,dh} }[/math]

with yield and recovery calculated as previously defined.

Limitations

• The model represents an equilibrium stratified bed. The predicted stratification state is independent of feed rate, residence time, and vessel size, which determine whether equilibrium can be achieved in practice.
• Hydrodynamic processes within the jig bed are not explicitly modelled, including effects associated with pulsation, hindered settling behaviour, and fluid–particle interactions.

Partition metrics

Several metrics are provided to characterise the partition curve.

The [math]\displaystyle{ \rho_{50} }[/math], also known as the cut or separation density, is defined as the density of a particle of a given size which has an even (50%) chance of appearing in either the concentrate or tails stream.

The Ecart Probable, or [math]\displaystyle{ E_{\rm p} }[/math], is a measure of the deviation of a partition curve from a perfect separation, and is typically defined for density separations as:

[math]\displaystyle{ E_{\rm p} = \dfrac{\rho_{75} - \rho_{25}}{2} }[/math]

where [math]\displaystyle{ \rho_{75} }[/math] and [math]\displaystyle{ \rho_{25} }[/math] are the densities of particles which have a 75% and 25% probability, respectively, of appearing in the concentrate stream.

The Imperfection, [math]\displaystyle{ I }[/math], is a normalised measure of the sharpness of separation, which is suggested to be independent of the magnitude of the [math]\displaystyle{ \rho_{50} }[/math], and is typically defined for density separations as:

[math]\displaystyle{ I = \dfrac{E_{\rm p}}{\rho_{50}} = \dfrac{\rho_{75} - \rho_{25}}{2 \rho_{50}} }[/math]

The [math]\displaystyle{ \rho_{50} }[/math] and [math]\displaystyle{ E_{\rm p} }[/math] for each size interval and the overall mass are determined by fitting the model-calculated partitions to the logistic Rho-50-Ep equation.

Excel

The King stratification jig model may be invoked from the Excel formula bar with the following function call:

=mdUnit_Jig_King(Parameters as Range, Size as Range, Density As Range, Feed as Range, Optional returnConcProfile As Boolean = False)

Invoking the function with no arguments will print Help text associated with the model, including a link to this page.

Inputs

The required inputs are defined below in matrix notation with elements corresponding to cells in Excel row ([math]\displaystyle{ i }[/math]) x column ([math]\displaystyle{ j }[/math]) format:

[math]\displaystyle{ Parameters= \begin{bmatrix} \text{Method}\\ A\text{ (-)}\\ b\text{ (-)}\\ \kappa\text{ (-)}\\ p\text{ (-)}\\ h_{\rm s}\text{ (m/m)}\\ (Q_{\rm M,F})_{\rm L}\text{ (t/h)}\\ \end{bmatrix},\;\;\;\;\;\; Size = \begin{bmatrix} d_{1}\text{ (mm)}\\ \vdots\\ d_n\text{ (mm)}\\ \end{bmatrix},\;\;\;\;\;\; \begin{bmatrix} (\rho_{\rm S})_{1}\text{ (t/m}^\text{3}\text{)} & \dots & (\rho_{\rm S})_{m}\text{ (t/m}^\text{3}\text{)}\\ \end{bmatrix},\;\;\;\;\;\; }[/math]

[math]\displaystyle{ Feed= \begin{bmatrix} (Q_{\rm M,F})_{11}\text{ (t/h)} & \dots & (Q_{\rm M,F})_{1m}\text{ (t/h)}\\ \vdots & \ddots & \vdots\\ (Q_{\rm M,F})_{n1}\text{ (t/h)} & \dots & (Q_{\rm M,F})_{nm}\text{ (t/h)}\\ \end{bmatrix},\;\;\;\;\;\; \mathit{returnConcProfile} = \big [ \text{(True / False)} \big ] }[/math]

where:

• [math]\displaystyle{ \text{Method} }[/math] indicates whether the jig is in a batch or continuous configuration, (0 = Batch, 1 = Continuous)
• [math]\displaystyle{ A }[/math] is the particle size coefficient (-)
• [math]\displaystyle{ b }[/math] is the particle size exponent (-)
• [math]\displaystyle{ \kappa }[/math] is the velocity profile shape parameter (-)
• [math]\displaystyle{ p }[/math] is the number of bed height increments (-)
• [math]\displaystyle{ h_{\rm s} }[/math] is the relative bed cut height (m/m)
• [math]\displaystyle{ Q_{\rm M,F} }[/math] is feed solids mass flow rate by size and ore type (t/h)
• [math]\displaystyle{ (Q_{\rm M,F})_{\rm L} }[/math] is the mass flow feed rate of liquids into the jig (t/h)
• [math]\displaystyle{ \mathit{returnConcProfile} }[/math] indicates whether to return the full volume concentration of solids by density class, size and bed height, (True/False)

Note that [math]\displaystyle{ \mathit{Density} }[/math] can be specified on a per particle size per ore type basis, or with a singular value for all particle sizes of a given ore type.

Results

The results are displayed in Excel as an array corresponding to the matrix notation below:

[math]\displaystyle{ \mathit{mdUnit\_Jig\_King} = \begin{bmatrix} \begin{bmatrix} \text{Iterations}\\ \text{Iteration error}\\ R_{\rm s}\text{ (frac)}\\ R_{\rm f}\text{ (frac)}\\ \rho_{50}\text{ (t/m}^3\text{)}\\ E_{\rm p}\text{ (t/m}^3\text{)}\\ I\text{ (-)}\\ (Q_{\rm M,C})_{\rm L}\text{ (t/h)}\\ (Q_{\rm M,T})_{\rm L}\text{ (t/h)}\\ \end{bmatrix} \begin{array}{cccccc} \begin{bmatrix} \bar d_1\text{ (mm)}\\ \vdots\\ \bar d_n\text{ (mm)} \end{bmatrix} & \begin{bmatrix} (Q_{\rm M,C})_{11}\text{ (t/h)} & \dots & (Q_{\rm M,C})_{1m}\text{ (t/h)}\\ \vdots & \ddots & \vdots\\ (Q_{\rm M,C})_{n1}\text{ (t/h)} & \dots & (Q_{\rm M,C})_{nm}\text{ (t/h)}\\ \end{bmatrix} & \begin{bmatrix} (Q_{\rm M,T})_{11}\text{ (t/h)} & \dots & (Q_{\rm M,T})_{1m}\text{ (t/h)}\\ \vdots & \ddots & \vdots\\ (Q_{\rm M,T})_{n1}\text{ (t/h)} & \dots & (Q_{\rm M,T})_{nm}\text{ (t/h)}\\ \end{bmatrix} & \begin{bmatrix} (P_{\rm C})_{11}\text{ (frac)} & \dots & (P_{\rm C})_{1m}\text{ (frac)}\\ \vdots & \ddots & \vdots\\ (P_{\rm C})_{n1}\text{ (frac)} & \dots & (P_{\rm C})_{nm}\text{ (frac)}\\ \end{bmatrix} & \begin{bmatrix} (P_{\rm C})_1\text{ (frac)}\\ \vdots\\ (P_{\rm C})_n\text{ (frac)}\\ \end{bmatrix} & \begin{bmatrix} (P_{\rm C})_1\text{ (frac)} & \dots & (P_{\rm C})_m\text{ (frac)}\\ \end{bmatrix} \begin{bmatrix} (\rho_{50})_1\text{ (t/m}^3\text{)}\\ \vdots\\ (\rho_{50})_n\text{ (t/m}^3\text{)}\\ \end{bmatrix} & \begin{bmatrix} (E_{\rm p})_1\text{ (t/m}^3\text{)}\\ \vdots\\ (E_{\rm p})_n\text{ (t/m}^3\text{)}\\ \end{bmatrix} & \begin{bmatrix} \begin{bmatrix} C_{111}\text{ (v/v)} & \cdots & C_{1m1}\text{ (v/v)}\\ \end{bmatrix} & \cdots & \begin{bmatrix} C_{111}\text{ (v/v)} & \cdots & C_{nm1}\text{ (v/v)}\\ \end{bmatrix}\\ \vdots & \ddots & \vdots\\ \begin{bmatrix} C_{11p}\text{ (v/v)} & \cdots & C_{1mp}\text{ (v/v)}\\ \end{bmatrix} & \cdots & \begin{bmatrix} C_{11p}\text{ (v/v)} & \cdots & C_{nmp}\text{ (v/v)}\\ \end{bmatrix}\\ \end{bmatrix}^*\\ \\ \\ \\ \\ \\ \\ \end{array} \end{bmatrix} }[/math]

where:

• [math]\displaystyle{ \text{Iterations} }[/math] is the total number of internal iterations required across all stages to reach the equilibrium stratification condition
• [math]\displaystyle{ \text{Iteration error} }[/math] is the maximum convergence error of the equilibrium stratification solutions across all stages
• [math]\displaystyle{ R_{\rm s} }[/math] is the overall recovery of solids to the concentrate (heavy) stream (frac)
• [math]\displaystyle{ R_{\rm f} }[/math] is the estimated recovery of water to the concentrate stream (frac)
• [math]\displaystyle{ (Q_{\rm M,C})_{\rm L} }[/math] is the mass flow rate of liquids to the concentrate stream (t/h)
• [math]\displaystyle{ (Q_{\rm M,T})_{\rm L} }[/math] is the mass flow rate of liquids to the tailing (light) stream (t/h)
• [math]\displaystyle{ Q_{\rm M,C} }[/math] is mass flow rate of solids to the concentrate stream (t/h)
• [math]\displaystyle{ Q_{\rm M,T} }[/math] is mass flow rate of solids to the tailing stream (t/h)
• [math]\displaystyle{ P_{\rm C} }[/math] is partition fraction of feed solids to the concentrate stream (frac)
• [math]\displaystyle{ C_{ijk} }[/math] is the volume concentration of solids of density class [math]\displaystyle{ i }[/math] and size interval [math]\displaystyle{ j }[/math] at height increment [math]\displaystyle{ k }[/math] in the equilibrium-stratified bed (v/v)
• [math]\displaystyle{ ^* }[/math] indicates optional results returned if [math]\displaystyle{ \mathit{returnConcProfile} = \text{True} }[/math]

Example

The images below show the selection of input arrays and output results in the Excel interface.

Figure 1. Example showing the selection of the Parameters (blue frame) array in Excel.	Figure 2. Example showing the selection of the Size (red frame), Density (purple frame) and Feed (green frame) arrays in Excel.
Figure 3. Example showing the outline of the Results (light blue frame) array in Excel. This exampple excludes the concentration profile data ([math]\displaystyle{ \mathit{returnConcProfile} = \text{False} }[/math])

SysCAD

The sections and variable names used in the SysCAD interface are described in detail in the following tables.

Note that a Con and Partition page is provided for each connected concentrate discharge stream.

MD_GravityConcentrator page

The first tab page in the access window will have this name.

Tag (Long/Short)	Input / Display	Description/Calculated Variables/Options
Tag	Display	This name tag may be modified with the change tag option.
Condition	Display	OK if no errors/warnings, otherwise lists errors/warnings.
ConditionCount	Display	The current number of errors/warnings. If condition is OK, returns 0.
GeneralDescription / GenDesc	Display	This is an automatically generated description for the unit. If the user has entered text in the 'EqpDesc' field on the Info tab (see below), this will be displayed here. If this field is blank, then SysCAD will display the unit class ID.
Requirements
On	CheckBox	This enables the unit. If this box is not checked, then the MassFracToCon option appears below.
MassFracToCon	Input	Only appears if the On field above is not checked. Specifies the fraction of feed mass that reports to the concentrate stream when the model is off.
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 products are multiplied back by the same value and returned to the SysCAD product streams. All unit model result values are shown per parallel unit.
Options
ShowQFeed	CheckBox	QFeed and associated tab pages (eg Sp) will become visible, showing the properties of the combined feed stream.
SizeForPassingFracCalc	Input	Size fraction for % Passing calculation. The size fraction input here will be shown in the Stream Summary section.
FracForPassingSizeCalc	Input	Fraction passing for Size calculation. The fraction input here will be shown in the Stream Summary section.
Stream Summary
MassFlow / Qm	Display	The total mass flow in each stream.
SolidMassFlow / SQm	Display	The Solids mass flow in each stream.
LiquidMassFlow / LQm	Display	The Liquid mass flow in each stream.
VolFlow / Qv	Display	The total Volume flow in each stream.
Temperature / T	Display	The Temperature of each stream.
Density / Rho	Display	The Density of each stream.
SolidFrac / Sf	Display	The Solid Fraction in each stream.
LiquidFrac / Lf	Display	The Liquid Fraction in each stream.
Passing	Display	The mass fraction passing the user-specified size (in the field SizeForPassingFracCalc) in each stream.
Passes	Display	The user-specified (in the field FracForPassesSizeCalc) fraction of material in each stream will pass this size fraction.

Con page

The Con page is used to specify the required model method and associated input parameters.

Tag (Long/Short)	Input / Display	Description/Calculated Variables/Options
Stage
On	Checkbox	This enables the stage. If off, the feed to this stage passes directly to the next stage (or tail) without partition.
Method	Partition (User)	The partition to concentrate for each size interval is defined by the user.
	Partition (Rho50-Ep)	The partition to concentrate for each species and size interval is defined by the Rho50-Ep model.
	Partition (Pivot)	The partition to concentrate for each species and size interval is defined by the Pivot model.
	Partition (Stochastic)	The partition to concentrate for species and each size interval is defined by the Stochastic model.
	Partition (Bazin)	The partition to concentrate for species and each size interval is defined by the Bazin model.
	Jig (King)	The partition to concentrate for species and each size interval is defined by the King jig stratification model.
	Spiral (Tucker)	The partition to concentrate for each species and size interval is defined by the Tucker spiral concentrator model.
	Shaking Table (Tucker)	The partition to concentrate for each species and size interval is defined by the Tucker shaking table model.
HelpLink		Opens a link to this page using the system default web browser. Note: Internet access is required.
Parameters
Method	Batch	The jig is operated as a batch or plug flow device.
	Continuous	The jig is operated as a continuous device.
ParticleSizeCoeff / A	Input	Coefficient of the particle size power law equation.
ParticleSizeExp / b	Input	Exponent of the particle size power law equation.
Kappa	Input	Velocity profile shape parameter.
NumHeightInc / hInc	Input	The number of height increments subdividing the bed.
CutHeight / hs	Input	The relative bed cut height.
Liquids
LiquidsSeparMethod	Split To Con (User)	Liquids are split to concentrate by a user-defined fraction of liquids in the feed.
	Split To Con (Model)	Liquids are split to concentrate by a fraction determined by the selected model.
	Con Solids Fraction	Sufficient liquids mass is recovered to the concentrate stream to yield the user-defined concentrate solids mass fraction value (if possible).
	Con Liquids Fraction	Sufficient liquids mass is recovered to the concentrate stream to yield the user-defined concentrate liquids mass fraction value (if possible).
ConSolidsFracReqd / Con.SfReqd	Input	Required value of the mass fraction of solids in the concentrate stream. Only visible if Con Solids Fraction is selected.
ConLiquidsFracReqd / Con.LfReqd	Input	Required value of the mass fraction of liquids in the concentrate stream. Only visible if Con Liquids Fraction is selected.
LiqSplitToCon / Con.LiqSplit	Input/Display	The fraction of feed liquids recovered to the concentrate stream.
Results
Iterations	Display	Shows the number of internal model iterations (per SysCAD step) required to converge the stratification model.
MaxError	Display	Shows the quantity of the convergence error between internal model iterations.
CutDensity / Rho50	Display	Unsized cut density (Rho50).
EcartProbable / Ep	Display	Unsized Ecart Probable (Ep).
Imperfection / I	Display	Unsized partition Imperfection (I).

Partition page

The Partition page is used to display (or specify) the partition by species/component/element/individual phase and size values.

Tag (Long/Short)	Input / Display	Description/Calculated Variables/Options
Distribution
Name	Display	Shows the name of the SysCAD Size Distribution (PSD) quality associated with the feed stream.
IntervalCount	Display	Shows the number of size intervals in the SysCAD Size Distribution (PSD) quality associated with the feed stream.
SpWithPSDCount	Display	Shows the number of species in the feed stream assigned with the SysCAD Size Distribution (PSD) quality.
Partition
Method	Model / User	Select model-calculated or user-defined partition to separate each solids species type.
Density	Display	Density of each solid species.
Size	Display	Size of each interval in mesh series.
MeanSize	Display	Geometric mean size of each interval in mesh series.
CutDensity / Rho50	Display	Cut density (Rho50) of all particles in each size interval.
EcartProbable / Ep	Display	Ecart Probable (Ep) of all particles in each size interval.
All (All column)	Display	Actual overall partition to concentrate of all solid species, for each size interval. Excludes solid species not present in the gravity concentrator feed.
Partition	Display	Partition to concentrate for each size interval, in each solid species, as determined by the selected model or user defined value. Note: These values are displayed regardless of whether the solid species is present in the gravity concentrator feed or not.
All (All row, All column)	Display	Displays the actual, total, partition of all solids with a particle size distribution property in the feed to concentrate. Excludes solid species not present in the gravity concentrator feed.
All (All row, per species)	Display	Actual overall partition to concentrate for each solid species, for all size intervals in that species. Excludes solid species not present in the gravity concentrator feed.
CmpPartition
Components		Hides or shows component partition table.
Size	Display	Size of each interval in mesh series.
MeanSize	Display	Geometric mean size of each interval in mesh series.
All (All column)	Display	Actual overall partition to concentrate of all solid components, for each size interval. Excludes solid components not present in the gravity concentrator feed.
CmpPartition	Display	Partition to concentrate for each size interval, in each solid component, as determined by the selected model or user defined value. Excludes solid components not present in the gravity concentrator feed.
All (All row, All column)	Display	Displays the actual, total, partition of all solid components with a particle size distribution property in the feed to concentrate. Excludes solid components not present in the gravity concentrator feed.
All (All row, per component)	Display	Actual overall partition to concentrate for each solid component, for all size intervals in that component. Excludes solid components not present in the gravity concentrator feed.
ElePartition
Elements		Hides or shows element partition table.
Size	Display	Size of each interval in mesh series.
MeanSize	Display	Geometric mean size of each interval in mesh series.
All (All column)	Display	Actual overall partition to concentrate of all solid elements, for each size interval. Excludes solid elements not present in the gravity concentrator feed.
ElePartition	Display	Partition to concentrate for each size interval, in each solid element, as determined by the selected model or user defined value. Excludes solid elements not present in the gravity concentrator feed.
All (All row, All column)	Display	Displays the actual, total, partition of all solid elements with a particle size distribution property in the feed to concentrate. Excludes solid elements not present in the gravity concentrator feed.
All (All row, per element)	Display	Actual overall partition to concentrate for each solid element, for all size intervals in that component. Excludes solid elements not present in the gravity concentrator feed.
IPhPartition
IPhases		Hides or shows individual phases partition table.
Size	Display	Size of each interval in mesh series.
MeanSize	Display	Geometric mean size of each interval in mesh series.
All (All column)	Display	Actual overall partition to concentrate of all solid individual phases, for each size interval. Excludes solid individual phases not present in the gravity concentrator feed.
IPhPartition	Display	Partition to concentrate for each size interval, in each solid individual phase, as determined by the selected model or user defined value. Excludes solid individual phases not present in the gravity concentrator feed.
All (All row, All column)	Display	Displays the actual, total, partition of all solid individual phases with a particle size distribution property in the feed to concentrate. Excludes solid individual phases not present in the gravity concentrator feed.
All (All row, per individual phase)	Display	Actual overall partition to concentrate for each solid individual phase, for all size intervals in that component. Excludes solid individual phases not present in the gravity concentrator feed.

About page

This page is provides product and licensing information about the Met Dynamics Models SysCAD Add-On.

Tag (Long/Short)	Input / Display	Description/Calculated Variables/Options
About
HelpLink		Opens a link to the Installation and Licensing page using the system default web browser. Note: Internet access is required.
Information		Copies Product and License information to the Windows clipboard.
Product
Name	Display	Met Dynamics software product name
Version	Display	Met Dynamics software product version number.
BuildDate	Display	Build date and time of the Met Dynamics Models SysCAD Add-On.
License
File		This is used to locate a Met Dynamics software license file.
Location	Display	Type of Met Dynamics software license or file name and path of license file.
SiteCode	Display	Unique machine identifier for license authorisation.
ReqdAuth	Display	Authorisation level required, MD-SysCAD Full or MD-SysCAD Runtime.
Status	Display	License status, LICENSE_OK indicates a valid license, other messages report licensing errors.
IssuedTo	Display	Only visible if Met Dynamics license file is used. Name of organisation/seat the license is authorised to.
ExpiryDate	Display	Only visible if Met Dynamics license file is used. License expiry date.
DaysLeft	Display	Only visible if Met Dynamics license file is used. Days left before the license expires.

Additional notes

• Solid species that do not possess a particle size distribution property are split according to the overall mass split of the default particle size distribution species selected in the SysCAD Project Configuration.
• If the default particle size distribution species is not present in the unit feed, the overall split of all other species with particle size distributions combined is used, as determined by the model.
• Gas phase species report directly to the tail stream without split.