To make it possible to obtain a sintered compact consisting of non- polluted asbestos by using asbestos, the treatment of which as industrial waste is of a problem and incineration ashes an raw materials and recycle the asbestos as adsorbents or architectural materials, such as tiles, bricks and cement fillers.
This sintered compact is the reactive sintered compact of a mixture composed of asbestos-containing materials and incineration ashes of municipal refuse. The sintered compact is obtd. by heating the mixture composed of the asbestos-containing materials and the incineration ashes of the municipal waste in a temp. range from 600 to 1700°C, thereby effecting and sintering the mixture. Reaction and sintering progress simultaneously at a relatively low temp. with the components of the incineration ashes of the municipal refuse and chrysotile (3MgO.2SiO2.2H2O) which is the essential component of the asbestos. The harmful chrysotile is annihilated and the asbestos is changed to a solid soln. contg. harmless gehlenite (2CaO.Al2O3.SiO2) and/or akermanite (2CaO.MgO.SiO2), foresterite (2MgO.SiO2) and crystobalite (SiO2) by this reaction.
URANO TERUO
MIYAJI HIROSHI
