TREATMENT METHOD OF REFINEMENT INTERMEDIATE PRODUCT

摘要

PROBLEM TO BE SOLVED: To provide a treatment method of a refinement intermediate product which obtains an arsenic compound in a shape suitable for stabilizing as an iron arsenate crystal from a non-iron refinement intermediate product.SOLUTION: The treatment method of the refinement intermediate product containing arsenic is carried out by adding an alkaline agent and an oxidant to a raw slurry containing arsenic and copper to make the arsenic leach into a liquid phase of the slurry.