Pickling bath regeneration
Crystallisation process for pickling baths
The crystallisation process presented here was developed by Schulz+Partner in collaboration with Cesus/Areva (France). It is used for pickling baths to recover acids and separate metals.
The following requirements must be observed:
- The acids must be volatile, such as nitric, hydrochloric or hydrofluoric acid.
- Acids such as sulphuric and phosphoric acid remain as a further residue.
The following recovery rates are possible:
- Nitric acid up to 99%
- Hydrofluoric acid between 40 and 99% depending on metal and metal concentration
- Water between 85 and 95% (depending on the proportion of water-binding crystals)
- Metal up to 100%
Advantages of the process:
- No waste water, all components are recovered and separated
- Process is operated in a vacuum, thereby reducing the risk of corrosion
We have previous experience with:
- zirconium
- titanium
- stainless steels
- high-alloy stainless steels
