METHOD FOR RECOVERING INDIUM OXIDE FROM LOW GRADE INDIUM CONTAINING RESIDUE

A method for recovering indium oxide from low grade indium-containing residue according to the present invention comprises the steps of: preparing indium-containing residue generated during a wet leaching process or a solvent extraction process for extracting indium (In) contained in indium tin oxide; putting tin into a melting furnace; putting the indium-containing residue into the melting furnace to melt the indium-containing residue and generating fume oxide by reacting indium with oxygen in the melting furnace; introducing exhaust gas including the fume oxide into a plurality of scrubbers and spraying a scrubber circulating liquid toward the exhaust gas by the scrubbers; collecting indium oxide included in the exhaust gas with the scrubber circulating liquid by gas/liquid contact to transmit the collected indium oxide to a centrifuge and performing solid/liquid separation by the centrifuge to primarily collect the indium oxide; introducing the exhaust gas passing through the scrubber into a bag filter and secondarily collecting the indium oxide included in the exhaust gas by the bag filter; and introducing the exhaust gas passing through the bag filter into an adsorber and removing smells and harmful components generated from the exhaust gas by the adsorber filled with activated carbon. The method of the present invention can increase the recovery rate of the indium oxide by recovering the indium oxide from the low grade indium-containing residue including indium in a short time.