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IMPROVEMENTS TO METHODS FOR HEAT TREATING FLUE GAS CLEANING RESIDUES AND RESIDUES FROM THE INDUSTRIAL PROCESS GENERATING SAID FLUE GASES
IMPROVEMENTS TO METHODS FOR HEAT TREATING FLUE GAS CLEANING RESIDUES AND RESIDUES FROM THE INDUSTRIAL PROCESS GENERATING SAID FLUE GASES
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机译:热处理烟气清洁残渣和工业过程中产生的烟气残渣的处理方法的改进
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PCT No. PCT/FR95/00555 Sec. 371 Date Oct. 17, 1996 Sec. 102(e) Date Oct. 17, 1996 PCT Filed Apr. 28, 1995 PCT Pub. No. WO95/30112 PCT Pub. Date Nov. 9, 1995An improvement to methods for heat treating flue gas cleaning residues (1) and residues from the industrial process generating said flue gases. For this purpose, the method comprises a physicochemical treatment step (2, 7), a heat treatment step (13) and a step involving treating gases generated by said heat treatment (19, 22, 28). These three steps are closely overlapped and combined both to minimise the volatilisation of volatile compounds during heat treatment and to remove separately the elements that cannot effectively be immobilised in the treated residue matrix during said heat treatment. The physicochemical treatment step may advantageously be combined with the wet cleaning step that may be included in the industrial process flue gas cleaning step. The method is particularly suitable for melting/vitrifying fly ash, agglomerating the finest fly ash, and destroying organic compounds such as dioxins and furans.
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