Sieve Changing module
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Contents
General Description
The Change Sieve Series model is required when a different size distribution (or sieve series) is to be used. This is particularly important when adding streams with different sieve series, as only streams with the same sieve series can be added. Therefore, before the streams can be mixed properly, the change sieve series model must be put in place.
To see more information on size distributions, please see Size Distribution (PSD).
Diagram
The diagram shows two streams using different sieve series mixing. A Change Sieve Series model is used to change the Coarse Sieve series to Fine Sieve Series before the mixing can correctly occur.
Inputs and Outputs
Label  Required Optional 
Input Output 
Number of Connections  Description  
Min  Max.  
Input  Required  In  1  1  Input stream to Change Sieve Series. 
Output  Required  Out  1  1  Output stream from Change Sieve Series. 
Model Theory
To convert from sieve series A to sieve series B:
 For size interval in sieve series A the Sieve Changing model converts the % passing data to the RosinRammler variable;
 The model then performs an interpolation to obtain the required RosinRammler variable at the required size interval in sieve series B;
 This is then converted to % passing for sieve series B.
Data Sections
The default sections and variable names are described in detail in the following table.
Unit Type: SzChng  The first tab page in the access window will have this name.
Tag (Long/Short)  Input / Calc  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:

On  Tick Box  The toggle the sieve changing operation on/off. 
SizeDefn  List Box  Lists all the available sieve series 
Results  
MassFlow / Qm  Calc  The Mass flow in the sieve changing module. 
SolidMassFlow / SQm  Calc  The Solid Mass flow in the sieve changing module. 
Feed.Distribution  Calc  The name of the feed size distribution entering the sieve changing module. 
Feed.NIntervals  Calc  The number of size intervals of the feed size distribution. 
Prod.Distribution  Calc  The name of the feed size distribution leaving the sieve changing module. 
Prod.NIntervals  Calc  The number of size intervals of the product size distribution. 
Adding this Model to a Project
Insert into Configuration file
Sort either by DLL or Group.

DLL: 
Comminution.dll

→ 
Units/Links 
→ 
Size Alteration: Change Sieve Series 
OR 
Group: 
Size Distribution 
→ 
Units/Links 
→ 
Size Alteration: Change Sieve Series 
See Project Configuration for more information on adding models to the configuration file.
Insert into Project

Insert Unit 
→ 
Size Alteration 
→ 
Change Sieve Series 
See Insert Unit for general information on inserting units.