Abstract: The present invention provides a manufacturing method of crude copper from low-grade copper sludge, one embodiment of the present invention comprises the steps of: (1) calcining a low-grade copper sludge (step 1); (2) producing a mixture by adding at least one selected from a group consisting of binder, flux and combinations thereof to the calcined low-grade copper sludge (step 2); (3) producing a briquette by compression molding the mixture (step 3); (4) melting and reducing by charging the briquette into a submerged arc furnace with adding flux (step 4); and (5) separating crude copper and slag produced by melting and reducing (step 5).

Abstract: The present invention provides a manufacturing method of crude copper from low-grade copper sludge, one embodiment of the present invention comprises the steps of: (1) calcining a low-grade copper sludge (step 1); (2) producing a mixture by adding at least one selected from a group consisting of binder, flux and combinations thereof to the calcined low-grade copper sludge (step 2); (3) producing a briquette by compression molding the mixture (step 3); (4) melting and reducing by charging the briquette into a submerged arc furnace with adding flux (step 4); and (5) separating crude copper and slag produced by melting and reducing (step 5).

Abstract: A method for recovering indium oxide from a indium-containing residue includes putting tin and an indium-containing residue into a melting furnace, melting the indium-containing residue, generating fume oxide through a reaction of indium and oxygen in the melting furnace, flowing the exhaust gas into a scrubber, spraying a scrubber-circulating liquid toward the exhaust gas in the scrubber, collecting indium oxide included in the exhaust gas with the scrubber-circulating liquid through a gas-liquid contact, performing a first collection of indium oxide through a separation of solid from liquid in a centrifuge, flowing the exhaust gas passed through the scrubber into a bag filter, performing a second collection of indium oxide included in the exhaust gas in the bag filter, flowing the exhaust gas passed through the bag filter into an absorption tower, and removing odors and toxic components generated in the exhaust gas in the absorption tower filled with an activated carbon.