Regarding the crystallization of zinc chloride using multi-effect evaporators, I would appreciate some advice from those with more experience
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Due to environmental concerns, the graphite slope plate evaporation method is no longer in use; it is intended to switch to zinc chloride crystal evaporators. How many effect stages would be appropriate? The pH value of the liquid is 4 before evaporation; is neutralization necessary? Otherwise, can the evaporator withstand corrosion?
Titanium is no problem; it’s just that the cost is too high. I was wondering if stainless steel would work
Can’t a graphite evaporator be used? Waste hydrochloric acid contains ferrous chloride, and graphite evaporators are often used to crystallize ferrous chloride
It is feasible to concentrate using a graphite evaporator within a certain concentration range, but it is difficult to concentrate zinc chloride to the point where crystallization occurs.