high temperature process and plant for the disposal of toxic and dangerous waste and the recovery of resources

摘要

The object of the invention is to provide a process and the corresponding industrial Plant(s) which make feasible the thermal treatment of Hazardous Waste of different nature and origin also mixed, excluding the release of harmful effluents. The process consists - for organic waste - in a very high temperature (2.000 C) pyrolysis, cracking and other pertinent reactions, all evolving in reducing conditions, at atmospheric or reduced pressure, in a melted iron bath containing dissolved carbon. A further dehalogenation elementary process based on the high temperature reaction, is a specific object of the invention; being the reaction as follows: CaO(s)+ZnC12+CO=CaC12+Zn+CO2. It allows the recovery of toxic volatile metals (Zn, Pb, Cd, Hg). Through the production of a gas having a medium heating value, an efficient recovery of energy in the process is obtained.