Study of partition of heavy and alkali metals during sewage sludge incineration

In order to study the distribution of heavy and alkali metals at different temperature zones during sewage sludge incineration, an experiment was carried out on a bench scale combustor. The results indicated that every metal has their own gas-solid conversation temperature. It was possible to separate and reuse the metals in fly ash. The heavy and alkali metals can be divided into four groups on the basis of their transformation temperatures: group A, being converted into condensed phase above 600℃, included Zn,Cd and P; the conversion temperature of group B, including Pb and Cu, was above 400℃; Na and Mg were among group C, the condensation temperature was lower than 300℃; As for group D, As was found, with transformation temperature between 300℃ and 400℃.