| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To solve the problem that the treatment of a waste printed circuit board based on a system for evaporating the resin components in an incinerator, produces toxic dioxins, the recovery rate of noble metals is bad, and causes oxidation, volatilization and scattering of the noble metals, because the waste printed circuit board is incinerated in a state of incomplete combustion by suppressing an amount of combustion air to be introduced as small as possible so that the temperature of the incinerator is not raised by combustion. <P>SOLUTION: The generation of the dioxins is suppressed by heat-treating the waste printed circuit board in a non-oxygen steamy atmosphere under optimum temperature conditions. The recovery rate is improved by preventing the noble metals to be recovered from being oxidized, volatilized and scattered. <P>COPYRIGHT: (C)2004,JPO</p> |
