Aðferð til að blanda sérstakri lofttegund í heitan reyk frá rafbræðsluofni áður en reykurinn er leiddur frá ofninum og reykhetta gerð í þessu skyni

摘要

A method and a hood for mixing a hot furnace gas with a second gas before the furnace gas is discharged from a furnace by directing the hot furnace gases out via a hood which forms an uninterrupted space for gas with the furnace is disclosed in which the second gas is fed along the side walls of the hood substantially countercurrently in relation to the hot gases emerging from the furnace in order to mix the gases with each other into a toroidal vortex, and that the gases are removed from this vortex tangentially.