At ARP, The Netherlands, Indaver has been recovering hydrochloric acid from the three pickling lines at Tata Steel for 20+ years. Hydrochloric acid is used to remove rust after the steel plates have been rolled. Indaver's grate incinerator – installed at Tata Steel's site in IJmuiden – oxidises the contaminated pickling liquid. This creates regenerated hydrochloric acid and iron oxide. Both are 100% suitable for re-use as a raw material in the steel and pigment industry.