| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a method for separating and removing non-ferrous metals from waste which is capable of efficiently separating the non-ferrous metals in the waste and decomposing org. chlorine compds. without the generation of dioxin. SOLUTION: The method for separating and removing the non-ferrous metals from the waste consists in mixing the waste and the org. chlorine compds. in such a manner that the total molar number of the non-ferrous metals in the waste and the chlorine molar number in the org. chlorine compds. attain 1:1 to 5, more particularly 1:2 in conversion. The non-ferrous metals in the waste are brought into reaction with the chlorine and carbon in the org. chlorine compds. under a reducing atmosphere under which the quantity of the oxygen existing during the reaction stage attains the theoretical quantity necessary for conversion of all the carbon-components in the supplied org. chlorine compds. to CO or below at a reaction temp. of 500 to 1200 deg.C, by which the non-ferrous metals are evaporated away in the form of metal chlorides. One or more kinds among vinyl chloride, vinylidene chloride, PCB, CNP, PCP, 2, 4, 5-T, 2, 4-D, PCDD and PCDF are usable as the org. chlorine compds.</p> |
