Incineration and Melting Properties of Illegally Dumpted Wastes in the Area Bordering Iwate and Aomori Prefectures

概要

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Illegally dumped industrial wastes in border areas of Iwate and Aomori prefecture have become a social problem in Japan. These wastes have been examined for practical use as concrete production materials in addition to melting processes. Municipal solid wastes have been examined using melting processes. However, few illegal wastes were investigated in this way.<BR>This study used chemical investigation to elucidate characteristics of these waste materials as recycled materials and treated waste materials using melting processes.<BR>These waste materials have different organizations in each burial area, but the following are tentative results. Principal components were silica, alumina, ferrite and calcium oxide. Compared with municipal solid wastes, these wastes have high ratios of ash. Furthermore, the calorific value of these waste materials was about 1/6.<BR>Exhaust gases of incineration and melting process were not harmful. We conclude that the molten slag might be useful as an aggregate material for concrete because heavy metals did not outflow from it.