D. Hodouin et S. Makni, REAL-TIME RECONCILIATION OF MINERAL PROCESSING PLANT-DATA USING BILINEAR MATERIAL BALANCE-EQUATIONS COUPLED TO EMPIRICAL DYNAMIC-MODELS, International journal of mineral processing, 48(3-4), 1996, pp. 245-264
Citations number
12
Categorie Soggetti
Mineralogy,"Mining & Mineral Processing","Engineering, Chemical
On-line material balance in mineral processing plants are extremely us
eful to upgrade the quality of the information, delivered by the senso
rs, which is used for manual or automatic control and real-time optimi
zation strategies. A method for on-line reconciliation of flowrates an
d compositions of complex mineral processing plants is proposed. Measu
red process variables are filtered and unmeasured ones estimated by mi
nimizing a criterion which contains deviations between filtered and me
asured values and deviations to process model equations. The model con
sists of two parts: steady-state mass conservation equations around th
e flowsheet nodes and dynamic transfer functions and pure delays repre
senting the stream dynamic behaviour. The reconciliation method is tes
ted on a simulated dynamic flotation plant. In comparison to on-line s
teady-state reconciliation methods, the dynamic models significantly i
mprove the quality of the estimated process variables, because they av
oid to have to compensate for process dynamics by averaging techniques
which distort the signal phases and amplitudes.