Indaver’s hydrochloric acid regeneration facility, known as Indaver ARP, at Tata Steel, Ijmuiden (The Netherlands), is a good reference to use because it is a similar project to IndaChlor.
Regeneration of hydrochloric acid
Since 2001, the Indaver ARP (Acid Recycling Plant) has been recovering hydrochloric acid from three pickling baths at Tata Steel, Ijmuiden, in the Netherlands. The hydrochloric acid is used to prevent corrosion of the steel slabs after rolling. The pickling acid used is oxidized in the Indaver ARP (located within the Tata Steel property at Ijmuiden, just north of Amsterdam). This oxidation produces regenerated hydrochloric acid, which is then reused by Tata Steel. This is a sustainable solution, where waste is transformed into raw materials. It takes place within a totally closed loop.
The iron oxide recovered is also reused as a raw material in the steel and pigments industries.
This makes the ARP plant a model of the circular economy.
Like IndaChlor, the ARP project is part of the Indaver Molecule Management (IMM) programme. The aim of this programme is to recover materials of quality from the residue streams of industrial processes. With the ARP project, Indaver has once again built a recycling facility right beside the manufacturing plant of an industrial partner, a steel company, in fact on its very site. This means that the hydrochloric acid recovered and the waste produced can be reused immediately in the steel-making process, rendering logistics costs negligible.
Specific technical knowledge is required for the processing of these complex, and often hazardous, residue streams and their transformation into new raw materials. This type of project is very interesting, because it permits greater independence from the (primary) raw materials markets and makes it possible to benefit from the raw materials recovered.