The Road to Manono, page-1029

Yep. understand that the second phase (sulphation) has a lower temperature than calcination (as per the pic) and the importance of high levels of heat in the calcination stage for facilitating the i.) ion exchanges between positive and negative charged resins is what aids removal of the deleterious elements in those stages as well as ii.) dissolving the soluble deleterious elements for allowing the exchange. Probably need a chemical engineer who understands the nicities/differences between the process flowsheets for hydroxide/carbonate to guide us. Nice discussion and all IMO