Method for manufacturing high purity tin, electrowinning apparatus for high purity tin and high purity tin

A method for manufacturing high purity tin having a purity of 5N or higher, the method comprising:

• electrodepositing tin on a surface of a cathode by electrowinning in an electrolytic bath in which a diaphragm is placed between an anode and the cathode, by using a raw material for tin as the anode and a leachate obtained by electrolytically leaching the raw material for tin in a sulfuric acid solution as an electrolytic solution, wherein the electrolytic solution contains a smoothing agent,
• discharging the electrolytic solution from the electrolytic bath, removing lead from the discharged electrolytic solution by a coprecipitation of adding coprecipitating agent containing strontium ion, and then performing a solid-liquid separation of the discharged electrolytic solution from which the lead is removed, and
• putting the electrolytic solution from which lead is removed back into the electrolytic bath.