Outotec Oyj

Kai Judin

Aimo Järvinen

Harri Natunen

Panu Talonen

Yrjö Oinonen

The invention relates to a method and apparatus for controlling a continuous metal removal in conjunction with a zinc preparation process, in which the metal removal is performed in one or more reactors (-), in conjunction with the reactor, the redox potential (-) and the acidity and/or basicity are measured, and based on the measurement results, the process variables (-) of the metal removal are adjusted towards the desired direction. According to the invention, the redox potential measurements (-) are performed from the sludge produced in the reactor in conjunction with the outlet pipe of the reactor outside the reactor, and the measuring instrument (-) is purified at predetermined intervals.

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Alaviirre, Finland

Kai Judin