Camera based Identification and Control of the Waelz Process

Jörg Matthes, Patrick Waibel, Hubert B. Keller, Lutz Gröll

2016

Abstract

TheWaelz process is the most common technique for the pyro-metallurgical treatment of zinc-bearing residues using a rotary kiln. However, this process will only result in a good zinc recovery, if the temperature of the material (slag) within the kiln is controlled at specific optimal setpoints depending on the material mixture. Until now, slag temperature measurement is carried out by pyrometers which give only pointwise information that can be disturbed by cold slag lumps. Additionally, the temperature control is performed only manually by operators, who have to adapt the amount of process air frequently to keep the process stable at the desired setpoints. In this paper an infrared-camera based measurement of the slag temperature using image processing techniques is presented. Based on that temperature measurement a process model is conducted. Its parameters are estimated by a model-output-error based process identification. The process model is used for the tuning of parameters of an automatic closed loop control. Finally, results from an industrial application of the new camera based slag temperature control are given.

Paper Citation

in Harvard Style

Matthes J., Waibel P., Keller H. and Gröll L. (2016). Camera based Identification and Control of the Waelz Process . In Proceedings of the 13th International Conference on Informatics in Control, Automation and Robotics - Volume 1: ICINCO, ISBN 978-989-758-198-4, pages 291-298. DOI: 10.5220/0005957402910298

in Bibtex Style

@conference{icinco16,
author={Jörg Matthes and Patrick Waibel and Hubert B. Keller and Lutz Gröll},
title={Camera based Identification and Control of the Waelz Process},
booktitle={Proceedings of the 13th International Conference on Informatics in Control, Automation and Robotics - Volume 1: ICINCO,},
year={2016},
pages={291-298},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0005957402910298},
isbn={978-989-758-198-4},
}

in EndNote Style

TY - CONF
JO - Proceedings of the 13th International Conference on Informatics in Control, Automation and Robotics - Volume 1: ICINCO,
TI - Camera based Identification and Control of the Waelz Process
SN - 978-989-758-198-4
AU - Matthes J.
AU - Waibel P.
AU - Keller H.
AU - Gröll L.
PY - 2016
SP - 291
EP - 298
DO - 10.5220/0005957402910298