| 摘要 |
<p>PURPOSE:To provide the improved reduction method which is safer and easier in operation than the methods practiced heretofore and is equal to or higher in the recovery rate of the noble metals obtd. by the method than by the conventional methods as the reduction of a pretreatment to be executed at the time of recovering the noble metals from noble metal scrap. CONSTITUTION:This reduction method for the pretreatment to be executed at the time of recovering the noble metals from the scrap contg. the noble metals and/or the compds. of the noble metals consists of reducing the noble metals by an aq. gas reaction effected at the time of burning the scrap in the state in which the scrap, carbon contents and steam coexsit.</p> |
