Halland Instruments AS

Zinc production: pH analyzers for the gypsum removal process.

Applications in other industries:

[Zinc production]
[Nickel production, chlorine process]
[Fertilizer industry]
[Nickel production, HPAL process]
[Alumina production]
[Titanium dioxide pigment prod.]
[Wastewater treatment]
[Cobalt production]
[Electroplating industry]
[Froth flotation, ore benefication]

Process description:
The facility consists of two tanks, two cooling towers and two thickeners. The pH is controlled automatically in one of the tanks using a controller and a valve which adds spent acid. The purified solution is cooled to separate gypsum by crystallization. The solution then enters two thickeners where gypsum is drained. The pH value is also measured in the thickener.

Number analyzers: 2. Flow: 200 to 300 m/h. pH range: 4 - 5 pH

Gypsum removal plant

Gypsum removal plant.




Gypsum outdoor installation

Outdoor installation of a model PH-1300 pH analyzer after five years of operation