PROCESS FOR THE DISPOSAL OF RESIDUAL MATERIALS WHICH CONTAIN FLUORINE- AND CYANIDE-CONTAINING COMPOUNDS

摘要

For converting water-soluble fluorine compounds into water-insoluble compounds, for decomposing the cyanides and for a low NOx emission, the residues are treated with addition of sulphates of calcium or magnesium in a two-stage fluidised bed at temperatures of 650-900 DEG C, the first stage being run under slightly reducing conditions and the second stage being run under oxidising conditions.