METHOD FOR SEPARATING IRON FROM AN AQUEOUS SOLUTION

摘要

Bivalent iron is separated as hematite from an aqueous solution, e.g. a sulphate solution having a pH of 2.5-4.5, by passing the solution through a tubular reactor in which a temperature of about 170 DEG C is maintained and into which an oxidizing gas is injected at multiple points along the reactor in order to oxidize the iron gradually as the solution moves through the reactor. The resulting hematite precipitate is readily filterable.