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such as energy balance, size distribution or species and TCE thermodynamic model add-ons. Only some small example projects can be opened in demonstration

usually gets some time to change the model over to an alternate, improved model. During this grace period, discontinued models should still load and project will

Precipitation3, Alumina 3 Bayer Species Model The Specific Surface Area (SSA) is used in the Precipitation3 model, a continuous stirred tank reactor with

the Access Window: === NOTE: This model will be discontinued - change to Falling Film Evaporator(4) ===. This legacy model has limited functionality and will

Species Model The Precipitator is modelled as a continuous well-mixed tank reactor with Gibbsite precipitation. The model may be configured either as a

Alumina 3 Bayer Species Model Batch Mode embeds a dynamic model batch process precipitation model into the steady state ProBal implementation. Although the

Not all models operate in all of the simulation modes. All the models are described in the online SysCAD Model documentation. The standard model set is

3 Bayer Species Model A Precipitation stage is modelled as a continuous well-mixed tank reactor. The residence time in a precipitation tank is typically

net. Alumina Precipitation and Classification with PSD Rare Earths Example Project New Reaction Heat Features in Alumina Precipitation Models Air in Modelling

Bayer Species Model, Size Distribution (PSD) This page describes the theory and behaviour of the PSD option in the Precipitation3 model. This page has

the Dynamic Alumina Precipitation model has been extended to allow the precipitator to act as a "network isolator" in a Dynamic model. This simplifies the

For simple precipitation reactions, which can be implemented as Reaction Blocks in a Tank model, the temperature change in the Precipitator model is identical

omitted from the model. If the streams are connected, any flow to the heater will exit at the same conditions. It is recommended that if a model is going to

(SSA) is mainly used in the Precipitation3 model, a continuous stirred tank reactor with Gibbsite crystallisation precipitation that is used in the Alumina

(SSA) is mainly used in the Precipitation3 model, a continuous stirred tank reactor with Gibbsite crystallisation precipitation that is used in the Alumina

with Generic Bayer Species Model and Precipitation Model are no longer included with standard SysCAD 9.3 install. These models are no longer supported and

Simulation of Agglomeration in Bayer Precipitation (Part I) Video: Advances in Simulation of Agglomeration in Bayer Precipitation (Part II) 26 Oct 2022 Build 139

implemented as a Species Properties Model but as a unit model for use at appropriate locations in a plant model. These models use OLI Systems leading Electrolyte

modification, but the Dynamic model uses the same parameters as the ProBal Model. This first release of the Dynamic Precip model operates as an overflow tank

multi-layered screen model that replaces the original Screen model. It includes all of the features of the original screen model, as well as: Allows the

with Generic Bayer Species Model and Precipitation Model are no longer included with standard SysCAD 9.3 install. These models are no longer supported and

plant model or even a large whiteside model with recycle streams, there is little point in requiring strict convergence of individual precipitation tanks

Alumina 3 Bayer Species Model Unit Type: Precipitator3 - The first tab page in the access window will have this name. Only visible when Precip.Method =

unit models must be changed to Alumina 3 Bayer Species Model and Precipitation3 models. Please solve and retune models. PGM Variable Name Change - Maximum

Navigation: Models ➔ Alumina Models ➔ Heat of Dissolution of Gibbsite and Boehmite Related Links: Precipitation3, Alumina 3 Bayer Species Model The dissolution

Launder input stream connection added to Flotation Cell model. Build 14611: Fix for Thickener model with makeups that when turned off did not stop the makeup

their own model procedures (MP) to be evaluated as part of some unit models. It is like having a PGM inside a Tank, Tie or Pipe model where the code is

Navigation: Models ➔ Sub-Models ➔ Solid-Liquid Separator Related Links: General Separator, Evaporator The Solid-Liquid Separator sub-model is used in the

Evaporation from precipitation tanks. ; The equation solves combined heat/mass transfer problems for free/forced convection from precipitation tanks, ; typically

automatically calculate the Heat of Reaction (HOR) for the dissolution or precipitation reaction based on the thermodynamic data in the Species database for

project must contain at least one OLI Model Configuration model. We have used two OLI Model Configuration models in this project, one we allow supersaturation

PGM file (Precipitation_PGM) Optional Reactions - The hydrate precipitation and Soda co-precipitation reactions are built into the Precipitation unit, no

the air and also the precipitation rate of sucrose from the film to the crystal. This is all taken into account in the model. The model also has the option

Counter flow tie to model columns and dryers. Topics covered in this document relate to using the Gibbs Free Energy Minimisation Reactor model in SysCAD and

with this model are strongly dependent on impurities concentrations. Temperature and supersaturation also have a strong influence. This model was developed

project: Alumina Precipitation and Classification with PSD. This builds on two older examples: Precipitation Project using Full PSD Precipitation Project using

Evaluation Block, prior to any sub-models being applied After each sub-model has been applied, including after the last sub-model has been applied. The PC (Phase

closed organic loop. (Flowsheet 02 Copper Solvent Extraction) The use of Model Procedures to add extraction based on residence time (Flowsheet 05 Non -

"drive" a plant model around nameplate or design condition by introducing small variations in each of the key parameters. Each time the model is run, the base

Navigation: Models ➔ Potash Models ➔ Potash Species Model ➔ Potash Solubility Related Links: Species Models, Evaluation Blocks, Solubility, Plant Model - Soluble

points at which we want to evaluate the model. We also create a vectorized function which is used to evaluate the model at each of the points. We use the resulting

species model in the configuration file as shown below. It is then possible to select the Bayer model (either Bayer3 or a client-specific Bayer model). On

Cell model The use of the Evaporator model as a crystalliser The use of the Filter Press model The use of the Evaporation Block (Evap) sub-model The use

database is used by the flash train section of the model. Note that Gypsum precipitation temperature is different to the Minteq_v4 database (used in the standalone

This example demonstrates using a number of tools to tune a steady state model (SysCAD project) based on data. This uses the Demo Precip Circuit in the

New Models and Add-Ons Model Improvements Model Enhancements New Models: Solids Recovery Unit : suitable for modelling solid recovery processes

Collaborative Model Development Services - this involves assistance and/or involvement in developing SysCAD projects (Base Case Plant Model). These services

the Flotation Cell model. The use of the General Separator model. The use of the Filter Press model. The use of the Evaporator model. The use of the Simple

Features Demonstrated Reverse Osmosis (RO) unit model General Separator unit model Pressure Exchanger unit model General Controller Material Flow Section -

every unit model. Combines old Audit and Closure. Removed some tags. Audit layout and tags have significantly changed, refer to Plant Model - Audit page

projects: Cooling Tower Project Evaporation Project Precipitation Projects using SSA Yield Method Precipitation Project using Full PSD

is modelled by a Tank with the EHX sub-model enabled to achieve the desired product temperature All Thickeners are modelled by the Thickener model using

option to Include All model - for improved usability when selecting unit models from model library dlls: For Edit Configuration - Model_Selection step, added

overview of the model, controls and SysCAD features. We'll also discuss potential improvements which could be made if adapting this model to a match a real-world

for configuring the model is: Make sure the project contains at least one of the ChemApp Model Configuration model, and the model is loaded with the correct

Project User Value 1 (set in Plant Model) (equivalent to Q) Val(2) = reference to Project User Value 2 (set in Plant Model) (equivalent to K') C_Li = a previously

other PHREEQC unit models such as the PHREEQC Side Calc Model or PHREEQC Reactor referencing this PHREEQC Model Configuration unit model will use the mappings

checked before the model can run. Model results will need to be reviewed and the model may need to be retuned. Fix for Precipitation3 new Agglom.UseMidSize

Shell and Tube Heat Exchanger 2 - Bug Fix for Shell and Tube 2 model with reaction sub-model in use, the LMTD calculations has been corrected to include heat

display of models used in a project that require a license AddOn. This information is on the PlantModel ModelList tab page. The Info page of each model now displays

to rerun several hundred SysCAD models just to fine-tune our diagram.) As we vary the feed composition and run the model, we are interested in the brine

Leach, Weak Acid Leach, Hot Acid Leach and Super Hot Acid Leach. Iron Precipitation to remove the iron Purification where various metals are separated Zinc

Configuration File Sort either by DLL or Group: See Model Selection for more information on adding models to the configuration file. Insert into Project Flowsheet

Bayer species model are calculated using the Standard species model, which uses the mass weighted mean of the liquor (see Standard Species Model). Refinery

connected, then the model acts just like the corresponding ChemApp Direct Calc model. Notes The user MUST have added and configured a ChemApp Model Configuration

Shows the use of ChemApp Model Configuration. Shows the use of ChemApp Direct Calc Model Shows the use of ChemApp Side Calc Model Shows the use of ChemApp

ChemApp Reactor using the Side Calc model option. The model has no links to any other models in SysCAD. Therefore, this model is not a part of any SysCAD network

exchangers. This model allows the user to embed these heat exchangers as part of the model. (This is often more efficient when carrying out the modelling calculations

the settings defined in the ChemApp Model Configuration unit model. The suggested workflow for configuring the model is: Make sure the project contains

for configuring the model is: Make sure the project contains at least one of the PHREEQC Model Configuration model, and the model is loaded with the correct

workflow for configuring the model is: Make sure the project contains at least one of the OLI Model Configuration model, and the model is loaded with the correct

Navigation: Models ➔ Alumina Models ➔ Bayer3 Species Model ➔ Bayer3 Species Model Theory Latest SysCAD Version: 23 April 2024 - SysCAD 9.3 Build 139.35250

for configuring the model is: Make sure the project contains at least one of the PHREEQC Model Configuration model, and the model is loaded with the correct

New Models and Add-Ons Model Improvements User Interface Improvements New TCE Add-Ons Improved Models for each TCE Add-On New TCE Models New Unit

for configuring the model is: Make sure the project contains at least one of the PHREEQC Model Configuration model, and the model is loaded with the correct

for configuring the model is: Make sure the project contains at least one of the PHREEQC Model Configuration model, and the model is loaded with the correct

connected, then the model acts just like the corresponding AQSol Direct Calc model. Notes The user MUST have added and configured a AQSol Model Configuration

workflow for configuring the model is: Make sure the project contains at least one of the AQSol Model Configuration model, and the model is loaded with the correct

for configuring the model is: Make sure the project contains at least one of the PHREEQC Model Configuration model, and the model is loaded with the correct

New Models and Add-Ons Model Improvements Model and Species Improvements New TCE Add-Ons The following

workflow for configuring the model is: Make sure the project contains at least one of the OLI Model Configuration model, and the model is loaded with the correct

for configuring the model is: Make sure the project contains at least one of the PHREEQC Model Configuration model, and the model is loaded with the correct

workflow for configuring the model is: Make sure the project contains at least one of the AQSol Model Configuration model, and the model is loaded with the correct

connected, then the model acts just like the corresponding OLI Direct Calc model. Notes The user MUST have added and configured a OLI Model Configuration unit

workflow for configuring the model is: Make sure the project contains at least one of the OLI Model Configuration model, and the model is loaded with the correct

for configuring the model is: Make sure the project contains at least one of the PHREEQC Model Configuration model, and the model is loaded with the correct

for configuring the model is: Make sure the project contains at least one of the PHREEQC Model Configuration model, and the model is loaded with the correct

workflow for configuring the model is: Make sure the project contains at least one of the OLI Model Configuration model, and the model is loaded with the correct

workflow for configuring the model is: Make sure the project contains at least one of the OLI Model Configuration model, and the model is loaded with the correct

switched off. Refer to Reverse Osmosis - Behaviour when Model is OFF for more details. Precipitation3 - Agglomeration terms for kernel, rate and collision

workflow for configuring the model is: Make sure the project contains at least one of the AQSol Model Configuration model, and the model is loaded with the correct

workflow for configuring the model is: Make sure the project contains at least one of the AQSol Model Configuration model, and the model is loaded with the correct

workflow for configuring the model is: Make sure the project contains at least one of the AQSol Model Configuration model, and the model is loaded with the correct

workflow for configuring the model is: Make sure the project contains at least one of the OLI Model Configuration model, and the model is loaded with the correct

workflow for configuring the model is: Make sure the project contains at least one of the AQSol Model Configuration model, and the model is loaded with the correct

for configuring the model is: Make sure the project contains at least one of the PHREEQC Model Configuration model, and the model is loaded with the correct

this applies mainly to solid species). For example, in modelling Bayer liquors and precipitation, we have to account for organic species, which are generally

workflow for configuring the model is: Make sure the project contains at least one of the OLI Model Configuration model, and the model is loaded with the correct

workflow for configuring the model is: Make sure the project contains at least one of the OLI Model Configuration model, and the model is loaded with the correct

Navigation: Models ➔ Evaporator ➔ Crystallizer There is no distinct 'Crystallizer' model within SysCAD, but the Evaporator model can be used to emulate

Area Model All unit models belong to an area model. Every project will automatically have one "Global Area". The user may insert other area models, which