PROCESS AND EQUIPMENT FOR RECOVERING MATERIAL OF VALUE FROM WASTE

PROBLEM TO BE SOLVED: To effectively recover materials of value in waste or waste incineration ash by fusing waste or waste incineration ash in a reducing atmosphere to recover materials of value and slag, each in a fused or molten state, and cooling and exhaust gas generated in this fusion stage to recover materials of value in the exhaust gas, each in a fused or molten state. SOLUTION: This process comprises: in a fusion furnace 1, fusing ash such as waste incineration ash, fly ash and/or fused fly ash to recover fused slag consisting of silica, alumina, calcia, or the like, (a multiple oxide of Si, Al, Ca, or the like), and to recover metals such as iron and copper, in a molten state, and introducing other low-boiling fractions together with an exhaust gas into a chloride separation furnace 2 subsequent to the fusion furnace 1; in the chloride separation furnace 2, receiving the exhaust gas including other low-boiling fractions from the fusion furnace 1, condensing mainly NaCl and KCl to discharge the NaCl and KCl in a fused state from the furnace bottom, and discharging the other remaining low-boiling fraction from an exhaust gas outlet port 28 as vapor in an exhaust gas; and in a metal separation furnace 3; cooling the exhaust gas from the chloride separation furnace 2 and recovering Zn and Pb metals in a molten state, or melting Zn and Pb metals in a solidified state to recover Zn and Pb metals in a molten state.