METHOD OF ASBESTOS DEGRADATION AND ASBESTOS DEGRADATION APPARATUS

摘要

Untreated asbestos substance and water are placed in reaction vessel (2). Subsequently, hydrofluoric acid is injected, and agitated while pulverizing the asbestos substance to thereby attain degradation of the asbestos by hydrofluoric acid. After the execution of degradation processing, the resultant reaction mixture is loaded with a fluoride ion adsorbent and a metal ion adsorbent. Thereafter, a neutralizing agent is added, and under agitation, neutralization is effected. Further, a coagulant is added, thereby obtaining aggregates. As the asbestos is converted by hydrogen fluoride into hexafluorosilicic acid (salt) and magnesium fluoride, the asbestos is completely eliminated and becomes nonasbestos inorganic substances, thereby attaining detoxification to human health. As the ion adsorption, neutralization and coagulation steps of the reaction mixture resulting from the chemical degradation of asbestos can be performed in hermetically sealed reaction vessel (2), safety can be ensured. As batch operation can be made by the use of the reaction vessel (2), large-volume processing can be realized.