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Research on technology and batch formula of sintering municipal sewage sludge for manufacturing haydite. |
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Abstract Sintering technology and batch formula of “anhydration-sintering” for manufacturing haydite in municipal sewage sludge were studied. The impacts of process conditions on product compression strength, hygroscopic coefficient and density were analyzed. Sintering temperature had important influence on haydite. The fitting sintering temperature was decided by the sludge percentage in batch formula, because of sludge’s low melting point, low intensity and fluxing action. The best technical scheme was as followed: the sludge percentage could reach 80% at most and the sintering process was warm-up at 350℃ for 20 minutes and sintering at 1060℃ for 15 minutes.
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Received: 22 May 2008
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