Dofasco Inc.

Vit Vaculik

Michael S Dudzic

Yale Zhang

Ivan P Miletic

Shannon L Quinn

R Blair MacCuish

Rajendra K Mutha

A new start-up operation of a continuous caster is monitored by comparing itself with the normal start-up operation, which is benchmarked by a multivariate statistical model using selected historical operation data. If the new operation is statistically different from the benchmark, then alarms are generated to indicate an impending start cast breakout and at the same time, the process variables that lead to process excursions from the normal operation are identified as the most likely root causes of the predicted breakout. The model is built using Mult-way Principal Component Analysis technology to characterize the operation-to-operation variance in a reduced dimensional space (also known as latent variable space) based on a large number of process trajectories from past normal start-up operations. The process trajectories over the entire start cast duration are predicted based on the current observations. They are then synchronized by interpolating themselves based on pre-specified non-uniform synchronization scales in the strand length such that all trajectories can be aligned with respect to the strand length for further use in model development.

Method and online system for monitoring continuous caster start-up operation and predicting start cast breakouts

A method and computer program for determining the amounts of desulphurizing reagents required to reduce the sulphur content in hot metal to meet a specified aim concentration. The determination of the amounts of reagents is based on a multivariate statistical model of the process. This model is initially based on a set of representative data from the process including all process parameters for which data are available. These parameters include chemistry-type variables and variables representing the state of operation of the desulphurization process. The use of a plurality of process and chemistry variables provides a more advantageous determination of the reagent quantities. Also, the method includes an adaptation scheme whereby new data are used to automatically update the predictive model so that the optimality of the model is maintained. Other features of the system include optimal handling of missing data, and data and model validation schemes.

Desulphurization reagent control method and system

A method of monitoring the operation of a continuous caster in which a multivariate statistical model is developed using off-line measurements of process parameters representing normal operation of the continuous caster. On-line process parameters are measured in real time to determine if the caster operation is normal by calculating test statistics on vectors calculated using the multivariate statistical model with input from the on-line process parameters. The method may advantageously be used to predict breakouts in a continuous caster and allows an operator to take corrective action to avoid such breakouts. Corrective action may also be taken automatically.

Growing community of inventors

Hamilton, Canada

Vit Vaculik