Effect of speed and accuracy of on-line elemental analysis on flotation control performance

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2007
Department
Department of Biotechnology and Chemical Technology
Major/Subject
Mcode
Degree programme
Language
en
Pages
1055-1066
Series
MINERALS ENGINEERING, Volume 20, issue 11
Abstract
In this paper the control performance of the flotation process is evaluated as a function of the measurement accuracy and sampling frequency of an on-stream analyzer. First, the performance of rule-based control and model predictive control (MPC) strategies is studied using discrete flotation models and the respective performance indices. Next, the net smelter return (NSR) is calculated for varying sampling rate and accuracy combinations using the PI controllers-based control strategy, mechanistic flotation models and the industrial process data as input. The control and economical performance of the process declines strongly when the sampling cycle is increased. The results also indicate that the speed of on-line analysis has a significant effect on the production economics, calculated as the average net smelter return.
Description
Keywords
Flotation; On-stream analysis; Economical optimization; Control performance; Sampling frequency; Measurement accuracy; MPC, Flotation, on-stream analysis, economical optimization, control performance, sampling frequency, measurement accuracy, MPC
Other note
Citation
Remes , A , Saloheimo , K & Jämsä-Jounela , S-L 2007 , ' Effect of speed and accuracy of on-line elemental analysis on flotation control performance ' , Minerals Engineering , vol. 20 , no. 11 , pp. 1055-1066 .