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1. (WO2018178509) ADJUSTMENT DEVICE MECHANISM FOR ANODES OF AN ALUMINIUM SMELTER AND METHOD FOR ADJUSTING ANODES OF AN ALUMINIUM SMELTER

Pub. No.:    WO/2018/178509    International Application No.:    PCT/FI2018/050212
Publication Date: Fri Oct 05 01:59:59 CEST 2018 International Filing Date: Fri Mar 23 00:59:59 CET 2018
IPC: C25C 3/08
C25C 3/20
H02P 5/46
Applicants: KUMERA OY
Inventors: TARULA, Vesa
RYTKÖNEN, Markku
KUMPULAINEN, Vesa
Title: ADJUSTMENT DEVICE MECHANISM FOR ANODES OF AN ALUMINIUM SMELTER AND METHOD FOR ADJUSTING ANODES OF AN ALUMINIUM SMELTER
Abstract:
The invention relates to an adjustment device mechanism for anodes of an aluminium smelter and to a corresponding adjustment method. An aluminium production cell used in the smelter comprises a cathode (2) forming the bottom of the production tank, and anodes (1) that are held at a suitable distance from the cathode by lifting and lowering the anodes. The adjustment device mechanism comprises a control device (3) having an algorithm. Each of the anodes (1) has their own adjustment device (4) that is independent of the other anodes and that includes its own power unit (8), arranged to control the power unit (8) with the algorithm of the control device (13) in order to adjust the distance of the anode from the cathode independently of the other anodes or synchronously with the other anodes. The adjustment device mechanism comprises a sensor (9) for monitoring the movement or position of the anode (1) or of a part that is proportional to its movement, and current measuring means (100) for individually measuring the current of each of the anodes. The algorithm of the control device (13) is arranged to select, based on the movement and position monitored by the sensor (9) and the current of the anode measured by the current measuring means (100), in connection with lifting and lowering said anode, an optimal mode of adjusting the acceleration for starting or stopping the movement.