Abstract:
According to a method for utilising solid, optionally with the addition of iron ore, the recyclings are introduced into a melting cyclone (6), together with a reduction agent containing carbon, and oxygen, swirled and ignited. The recyclings are melted, the volatile heavy metals are reduced and evaporated and the iron oxides are reduced. The gases and melt are transferred together from the melting cyclone (6) to a directly connected separating vessel (7) in which the melt and gases are separated. The evaporated heavy metals are separated out of the gases outside of the separating vessel (7) and the melt is transferred into a metallurgical vessel (10) that is separate from the separating vessel (7). According to the invention, reduction agents which are fed into the metallurgical vessel (10) reduce the iron oxides of the melt to iron, whereby a slag that is low in iron is formed, while electrical energy is introduced to at least partially cover the heat loss and the reduction energy, in order to transform 100 % of the recyclings containing iron and heavy metals into useful products.
Abstract:
Bei einem Verfahren zum Verwerten von eisen- und schwermetallhältigen, festen Reststoffen, gegebenenfalls unter Zugabe von, Eisenerz, wobei die Reststoffe zusammen mit kohlenstoffhältigen Reduktionsmittel sowie Sauerstoff in einen Schmelzzyklon (6) eingebracht, verwirbelt und gezündet werden, die Reststoff aufgeschmolzen werden, flüchtige Schwermetalle reduziert und verdampft werden und Eisenoxide reduziert werden, die Gase und die Schmelze aus dem Schmelzzyklon (6) gemeinsam in ein unmittelbar gekoppeltes Abscheidegafäss (7) überführt werden, in welchem eine Trennung von Schmelze und Gasen erfolgt, die verdampften Schwermetalle ausserhalb des Abscheidegefässes (7) aus den Gasen abgeschieden werden und die Schmelze in ein von Abscheidegefäss (7) getrenntes metallurgisches Gefäss (10) überführt wird, werden in das metallurgische Gefäss (10) einerseits Reduktionsmittel zugeführt, die Eisenoxide der Schmelze unter Bildung einer eisenarmen Schlacke zu Eisen reduziert und wird andererseits elektrische Energie zur zumindest teilweisen Deckung der Wärmeverlust und der Reduktionsenergie eingebracht, um die eisen- und schwermetallhältige Reststoffe zu 100% in verwertbare Produkte zu überführen.
Abstract:
According to a method for utilising solid, optionally with the addition of iron ore, the recyclings are introduced into a melting cyclone (6), together with a reduction agent containing carbon, and oxygen, swirled and ignited. The recyclings are melted, the volatile heavy metals are reduced and evaporated and the iron oxides are reduced. The gases and melt are transferred together from the melting cyclone (6) to a directly connected separating vessel (7) in which the melt and gases are separated. The evaporated heavy metals are separated out of the gases outside of the separating vessel (7) and the melt is transferred into a metallurgical vessel (10) that is separate from the separating vessel (7). According to the invention, reduction agents which are fed into the metallurgical vessel (10) reduce the iron oxides of the melt to iron, whereby a slag that is low in iron is formed, while electrical energy is introduced to at least partially cover the heat loss and the reduction energy, in order to transform 100 % of the recyclings containing iron and heavy metals into useful products.