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Manufacturer of proprietary pH analysers for the hydrometallurgical zinc industry.

Halland Instruments AS

Applications overview:

APPLICATION: Automatic pH control in the Purification processes.

Process description:
This process has three stages: Copper pre-precipitation, cobalt precipitation and polishing.
There are two pH analysers in the copper pre-precipitation stage. In this process the pH is controlled automatically before the zinc dust is added using a controller and a valve which adds spent acid. The pH is also controlled after the addition of zinc just by means of second controller for the spent acid valve number two. The pH in the polishing stage is measured.

pH range: 3-4.5 pH
Flow: 200 to 300 m/h
Number of analyser: 3

purification-instrument-ute-bruk

Model PH-130 pH analyser after seven years of operation. The analyser measures the pH before adding zinc dust, and it is used for automatic pH control.

 

purification-copper-bruk-purification

pH analyser, measures the pH after adding zinc dust, used for automatic pH control.

 

purification-pop3-bruk-purification

pH analyser, measures the pH after the polishing step.