• Table of Contents
• Introduction
• Plant Data
• Electrolyte Properties
• Concentration Converter
• Cell Voltage
• Alumina Feeding
• Anode Table Layout

• Table of Contents
• Introduction
• How to Use AlPrg
• Plant Data
• Alumina Feeding
• Electrolyte Properties
• Cell Voltage

• Table of Contents
• Introduction
• ATab Version 2
• Layout-View
• Evaluation-View
• 3D-View
• Floating Windows
• Optimization Window
• Examples
• Downloads

• Table of Contents
• Principles Hall-Héroult
• Mass Balance
• Electrolyte Properties
• Cell Voltage
• Energy Balance

• Current Efficiency

• Raw Materials

• Cell Operation

• Measurements

• Environment, Emissions
• Examples, Exercises
• Literature

• News and Events
• Name Index
• Subject Index
• Sitemap
• Recreation

Floating windows are dialog windows that you can move freely on your computer screen. You use these windows to change values or to study evaluation results.

Anode Table Data

You open a floating windows like it is described for the Layout-View by activating the corresponding items on the menu bar (Windows  Anode Table Data for the Anode Table Data floating window) or context menu respectively by clicking on the Anode Table Button  of the toolbar.
On this window you enter or modify the principle values of the anode table (anode properties, cycle period) and the electrolytic cell (cell arrangement, cell dimensions and properties of the electrolyte and aluminum metal pad). When you modify the value in the colored input fields (anode number and cycle period) ATab reates a new layout with standard anode numbering and anode change schedule.

Anode Table Floating Window.

On this dialog window you enter or modify parameters for the anode table (anode properties and anode change cycle period) and for the electrolysis cell (cell arrangement, cell dimensions and properties of the electrolyte and the aluminum metal pad). A colored input field (number of anodes and anode change cycle period) means that ATab creates a new standard anode table layout when you change this value.

Anode Table Layout History

When you start ATab it uses the data of the last selected layout therefore the Anode Table Layout History window shows only one data line of values. You open this floating window by clicking on the menu item Windows  Layout or on the Layout History Button   of the toolbar. With the Select Values combo box you determine which values ATab should represent as, for instance, the Cycle Period Averages or the Daily Averages as shown in the next figure.

Cycle Period Averages and Daily Averages on the Anode Table Layout History Window.

At program start ATab uses the data of the last selected layout. The Layout History window shows only one line of evaluation values. You select the type of values to be shown with the Select Values combo box at the bottom of the window.

These values correspond to the data that the Evaluation View shows with much more details. The meaning of the columns is:

Remark:

you switch between the representation of the Layout  History Window by clicking on the first button of the windows head. Similarly by clicking on the other head buttons you activate the corresponding representation of the Evaluation-View, for instance, the Average Anode Distances and Anode Change Paths view if you click on the d-button.

Relative Cycle Period Averages

To select optimal layouts and to compare layouts with different anode table data ATab calculates relative values. The Inverted Standard Pattern serves as reference layout. The next figure shows the anode change paths of the Demo layout (A) and its reference layout (B).

Demo Layout and its Reference Layout.

This figure shows the anode change paths of the Demo layout (A) and its reference layout i.e. an inverted standard pattern.

The next figure represents the relative values (in percent) and the Cycle Period Averages of the reference layout.

Relative Averages and Reference Values.

ATab calculates the Relative Cycle Period Averages using the Cycle Period Averages of the Demo version and the Cycle Period Averages of its reference layout.

The next figure shows the Relative Cycles are listed for eightic Period Averages determined for the layout published in the literature namely by J. Purdie et al. (2001) [Lit.]. The relative values layouts (see Examples).

Relative Cycle Period Averages for published Anode Table Layouts.

This figure shows averages values determined for layouts published in the literature by J. Purdie [Lit.]. Please compare with Examples.

Create and Save Layouts

After each action ATab creates a new layout with the new input data and evaluation values. The next figure shows the Layout History window after the following changes were made: anode density, anode changing schedule and anode numbering. You may click on one of the Layout History lines and ATab goes back to the corresponding layout.

Layout History Window with Several Layouts.

When you change, for instance, the anode density, the anode change schedule or the anode numbering ATab creates a new layout using the new input data to calculate new evaluation results. When you click on one of the lines ATab selects the stored layout data to be displayed in the ATab windows.

When you quit ATab it saves only the values of the last selected layout. However you may save layouts as an XML-file: a single layout by activating File  Save Selected Layout as... or the whole set of layouts as File   Save Layout List...

Save Layouts

You save layouts by clicking on the corresponding menu item: a single layout (Save Selected Layout as...) or all the layouts (Save Layout List...).

Numbering Pattern

If you want to modify an existing numbering pattern or want to create a new pattern you do it with Numbering Pattern window (menu: Windows  Numbering Pattern or toolbar: Numbering Pattern Button  ) by pressing the corresponding button.

Numbering Pattern

You modify an existing numbering pattern or you create a new pattern by pressing the corresponding button. You may also change the start anode of the anode changing schedule.

If you want to modify an existing numbering pattern or want to create a new pattern you do it with Numbering Pattern window (menu: Windows  Numbering Pattern or toolbar: Numbering Pattern Button  ) by pressing the corresponding button (see next figure).

Modified Numbering Pattern.

ATab modified the demo numbering pattern (upper left figure) to the standard numbering pattern (upper right figure) without changing the principle layout i.e. ATab converted correspondingly also the anode change schedule. The lower figure shows a newly created standard numbering pattern.

You may want to change the start anode of the anode change schedule. The next figure shows what happens when you replace anode 10 with anode 19 as start anode. Again ATab did not modify the principle but changed only the numbering schedule.

Modified Start Anode.

You may want to change the start anode from anode 10 (left layout) to anode 19 without modifying the principle layout. The left figure is the reslut of this action.

3D View Parameter

It is the main idea of this window to define precisely the parameter of the three dimensional picture. You store these data to represent several layouts in the same way. You can only open this window when the 3D-View is active by clicking on the menu item Windows  3D View Parameter or on the 3D View Parameter Button  on the toolbar.

3D View Parameter

On this window you define the precise values of the three dimensional drawing. You save them in memory and represent other layouts in the same perspective projection.