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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 Residue treatment plant.

Process description:
In a string of three tanks residue (filter cake) from the filter presses in the purification steps is solved in spent acid.
The pH value is measured in two the first tanks.  The pH values are adjusted automatically with two PID controllers and two valves which adds spent acid.

pH range : 2-2.5 pH
Flow: 3 m/h
Tanks: 3 tanks each with a capacity of 40 m
Number of analyser: 2

residue-anlegg-bruk-residue

The residue treatment plant.

 

 

 

Residu-ph-bruk-residue

The two pH analysers are mounted on top of the tanks.