Abstract: In order to provide reference for efficiently recovery of indium from Indium-bearing zinc ferrite，the processing conditions for leaching of synthesis indium-bearing zinc ferrite in sulphuric acid and its leaching kinetics model were studied with the indium leaching rate as index. The results showed that IBZF within range of 0.150 ~ 0.045 mm in particle size had little effect on indium，but leaching temperature，leaching time and stirring speed greatly impacted on leaching rate of indium. The ideal leaching temperature is 85 ℃，leaching time is 60 min，and stirring speed is 300 r/min. The indium leaching reaction of IBZF in sulfuric acid fits the un-reacted shrinking core model with the apparent activation energy E_a of 53.555 kJ/mol.

Key words: Indium-bearing zinc ferrite, Indium leaching by acid, Kinetics of leaching