MATERIALS CONTAINING NITROGEN

摘要

In a scrap recovering furnace for burning the insulation from electric cables and comprising a first combustion chamber in which the solid materials are burnt and from which molten products are collected and one or opt. two combustion chambers for the gases and fumes from the first chamber, as in the parent patent, in operation the gases and fumes to be burnt stay for >=0.1 secs, pref. 0.4 secs, in the second chamber. The transit time of the gases and fumes in the second chamber is precisely regulated.