Method of recovering glass and metal from solid residues produced in refuse incineration plants
AssigneeVon Roll Umwelttechnik AG
InventorsPeter Schoener, Karl-Heinz Pfluegl, Norbert Kiethe
Life of this patent
Estimating the term…
Abstract
Glass and metal are recovered separately by melting from the solid residues produced in a refuse incineration plant, particularly from slag. The melting is effected in two zones. In the first, top melting zone the oxidic constituents of the residues are converted into a glass melt. In the second, bottom melting zone the metallic constituents of the residues are converted at a higher temperature into a metal melt. The two melts are recovered separately.
Claims16
A method of recovering glass and metal from solid residues produced in a refuse incineration plant having a furnace space by subjecting the solid residues containing metallic constituents to a melting process, comprising:
- feeding the solid residues to a first top melting zone,
- converting oxidic constituents of the solid residues in the first top melting zone into a glass melt,
- feeding the metallic constituents of the solid residues from the first top melting zone to a second, bottom melting zone at a higher temperature than that of the first melting zone,
- converting the metallic constituents into a metal melt by using carbon heating electrodes, and
- separately recovering the glass and metal melts.
A method according to one of the preceding claims, wherein the method is carried out continuously.
An apparatus for carrying out a method of recovering glass and metal from solid residues, which comprises:
- a closed melting furnace having a first, top melting zone with heating electrodes for a glass melt, a second, bottom melting zone having carbon heating electrodes for a metal melt, and a feed duct, leading into a top part of the closed melting furnace, for feeding solid residues which are to be melted.
Dependencies are inferred from the claim text.