The process of using iron powder to remove selenium from electrolytic manganese anolyte was investigated. The effects of variables such as stirring speed

iron powder dosage

sulfuric acid concentration and temperature were assessed. Experimental results indicated that the maximum remove rate of selenium to be 100% at a stirring speed of 600 r·min-1

iron powder dosage of 400 mg·L-1

sulfuric acid concentration of 50 g·L-1 and temperature of 30℃. XRD and SEM analyses showed that temperature had a significant influnence on the structure of selenium residue. There had four phase Se

Fe

FeSe2 and Fe2(SeO4)3 existed in the slag after reaction at 30℃

and the crystallization morphology was spindle. The phase existed in the slag after reaction at 90℃ were Se and FeSe2

and the morphology of crystals was sperical. The removing process was controlled by interface control. The apparent activation energy of removing selenium was determined to be 15.94 kJ·mol-1.