Show in a study of the precipitation of zinc from lurg ical solutions being conducted by the bureau of mines at salt lake city some work has been performed by the use of sulphur dioxide and limestone in precipitating calcium sulphate which can be filtered off and after demov in ing the excess SO soa by heating the solution which caused t the he precipitation of zinc sulphite this material was then at a low temperature which formed a zinc oxide further work will be conducted to determine the feasibility of erecting a zinc chloride plant in the intermountain country |