Process for detoxification and extraction of metals from slag and of fly ash resulting from combustion

摘要

The method involves subjecting a flow of fine carbon and calcium enriched particles (13) to acid extraction in an extraction reactor (402) and directing the flow to a solid/liquid separator (501) i.e. centrifuge, where hydrochloric and sulfuric acids are supplied to the reactor. A small fraction of solid residues e.g. clinkers (2), is supplied to a solid-liquid contacting reactor (601) i.e. stirred reactor. A flow of large silicate enriched particles (17) is subjected to the extraction in the reactor (601). A particle flow (20) leaving from the reactor (601) is supplied to a filter (701).