1. Product Overview This treatment line is specifically designed for resource recovery of waste hydrochloric acid generated from pickling processes in the hot-dip galvanizing industry, with a processing capacity of 5 tons/day. Waste hydrochloric acid contains ferrous chloride and zinc chloride at concentrations of approximately 5-10%. Through freeze crystallization + sulfuric acid replacement processes, ferrous sulfate monohydrate byproduct is recovered and regenerated