Understanding and Improving Chemical Capability in the Casthouse

An aluminium casthouse casts aluminium in charges (or drops). These charges are made to particular customers' ordered chemistry specification. The ability for a casthouse to accurately and consistently produce charges inside the customers' specification is crucial for productivity. In addi...

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Bibliographic Details
Published in:AIP conference proceedings 2012-03
Main Authors: Halse, Kolbjoern, Bowles, Amanda, Johansen, Inge
Format: Article
Language:English
Subjects:
Aluminium
Aluminum
Customers
Mathematical models
Sampling
Specifications
Online Access:Get full text
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Summary:An aluminium casthouse casts aluminium in charges (or drops). These charges are made to particular customers' ordered chemistry specification. The ability for a casthouse to accurately and consistently produce charges inside the customers' specification is crucial for productivity. In addition, it is important that a casthouse can accurately and consistently measure the real composition of each charge. In this paper the sources of uncertainty in the chemistry are classified and discussed. The use of a model to study sensitivities on the predicted process capability (Cpk) from changes in charging accuracy, conditions during analysis, sampling and adjustment is demonstrated. The model can be used as tool to indentify improvement potentials.
ISSN:0094-243X