Verfahren und Vorrichtung zur Entsorgung von Filterstoffen

摘要

The invention relates to a method and to a low-shaft furnace for the disposal of filter dusts, filter sludges and filter ashes. In order to be able to obtain the charge quantity of such filter materials in the slags of the low-shaft furnaces and to recover a maximum quantity of valuable materials from the slag, it is proposed that the material for disposal is charged onto or into the slag bath, that simultaneously additives are introduced into the slag via an immersion lance and that, during the charging of the additives, the parameters determining the electric resistance, namely the height of the slag bath and the depth of immersion of the electrodes, are adjusted in a special way. For this purpose, the electrodes (21-26) have a defined diameter (D), and at least one delivery pipe (31-33) of a disposal feeder device (30) is provided in the upper part of the furnace vessel (12) underneath the cover (13). Parallel to the electrodes (21-26), a lance (41,47-49) is fixed to a support arm (43), which lance is connected to a burdening ring (42) and communicates via a sliding seal (14) with the furnace cover (13).