Caustic soda flakes for alumina and metals

How the industry uses caustic soda flakes

The Bayer process digests bauxite in hot caustic solution to dissolve alumina — it is one of the largest industrial uses of NaOH in the world. Metal plants also use caustic for surface cleaning, etching and pickling-neutralisation.

• Bayer-process digestion of bauxite for alumina production
• Caustic etching and cleaning of aluminium, zinc and copper surfaces
• Neutralisation of acidic pickling baths in steel and galvanising plants
• Mineral processing and ore leaching where strong alkalinity is required

What to specify when you buy

• Low iron — iron carried in with the caustic ends up in the alumina or on the metal surface; our independently tested iron oxide result was 0.0006% (6 ppm).
• High assay — digestion efficiency is a direct function of available NaOH.
• Steady multi-container supply — refining and galvanising lines cannot stop; discuss a shipment schedule rather than single lots.

Recommended supply

For continuous operations, 99% min flakes in jumbo bags with a rolling FCL schedule is the usual arrangement. Send your monthly tonnage for a programmed offer.

Full technical data on the caustic soda flakes product page · packing and container details under packing and loading · storage guidance in our handling guide.