VITRIFICATION PROCESS FOR TREATMENT OF SEWAGE-SLUDGE AND INCINERATIONASH

Vitrification processes, in which the operating temperature is higher than the melting point of the silica compounds contained in sewage slu dge that turns into slag, are studied in this paper. The dried sludge and the incineration ash are injected into a furnace with auxiliary fu el and flux. The flux is the material used to control basicity of the ash content. Crushed limestone is used as the flux in this test. Almos t all ashes in the sludge are vitrificated into slag. The flow of molt en slag from the tap is smooth. After the slag is treated, it can be u sed as wall tile, interlocking tile, insulating material, and slag woo l. This technology conforms to resource recycling.