Process and apparatus for recovery of raw materials from wastes residues

Process for recovering raw materials from wastes and residues, in particular for recovering heavy metals, in which a liquid or paste-like feed mixture and/or a feed mixture comprising comminuted or milled constituents is first produced, where the recovery of the raw materials from the feed mixture is carried out by means of a chemical-thermal treatment and the waste gases are conveyed from the furnace through a multistage filter unit, where the first filter in each case is configured as a hot filter and the waste gases are subsequently cooled and flow through at least one second filter, are preheated and are then burnt at a high temperature, characterized in that

• the liquid, paste-like and/or solid feed mixture is first mixed, as a function of its composition, with additives,
• the feed mixture is blown together with an oxidizing or reducing agent into the furnace,
• the feed mixture is subsequently subjected to the chemical/thermal treatment in the furnace by the furnace atmosphere flowing at a predetermined flow velocity through the blown-in feed mixture at a predetermined temperature,
• so as to form, as a function of the air composition and temperature, low-density flakes containing heavy metals which are conveyed by the air flow velocity established in the furnace through the filter unit.