Method for enriching and recovering indium from zinc oxide acid supernate

The invention discloses a method for enriching and recovering indium from zinc oxide acid supernate, which is characterized by comprising the following: a step A of reduction and purification, which is to put iron powder into zinc oxide acid supernate to reduce Fe into Fe and removing the impurities from the solution at the same time; a step B of liquid and solid separation, which is to filter the solution obtained by the step A to obtain reduced and purified solution and reduced and purified slag; and a step C of replacing precipitated indium, which is to add zinc scum into the reduced and purified solution obtained by the step B to replace the precipitated indium, filtering to obtain filtrate and indium-enriched slag, recovering indium from the enriched slag and returning the filtrate to a zinc system to recovery zinc. The method is mainly used in wet-method zinc making plants for enriching and recovering indium from zinc oxide acid supernate.