Verfahren zum Entfernen von Metallen aus Reststoffen

摘要

PROBLEM TO BE SOLVED: To provide a method for removing metal from an incinerated solid residual material or from a metal-containing residual material of another origin. SOLUTION: A residual material P0 exists in the form of fine particles or is powdered to form fine particle. The residual material is preferably formed again into granules 1a composed of porous granules 1. The granules 1a are exposed to a gas stream 2b containing HCl and H2O during heat treatment. By means of the gas stream, vaporized metal and/or vaporized metallic compound, particularly metal chloride, is transported from the granules 1a to be treated to the outside. The maximum value of heat treatment temperature is previously determined, and the collapse of the pores in the granules can be prevented at that temperature as a result of melting of the residual material. In the formation (10) of the granules, combustible particles (12) of similar size distribution or finer size distribution are further mixed with particlescombustible particles (12) have high carbon C content.