JP2007295943A5 - Treated aqueous solution and method for dissolving asbestos and rendering it harmless - Google Patents

Claims (8)

Sprayed asbestos (Other, asbestos sprayed rock wool, asbestos-containing refractory garment plate etc.) during the process to yield front scattering and prevention of asbestos by wetting the purpose of processing (first stage), a slow dissolving action Treated aqueous solution with a phosphoric acid concentration of 30 to 35 ± 5%, which is used for the purpose and used for slow dissolution of asbestos building materials . When processing sprayed asbestos (others, asbestos-containing sprayed rock wool, asbestos-containing fire-resistant coated sheet, etc.), it is used as a solution exclusively for rapid dissolution of asbestos, which is the purpose of the later stage (second stage) , and other asbestos Treatment solution with 50 ± 5% concentration of phosphoric acid used for rapid dissolution of building materials . As the first step in the detoxification treatment of sprayed asbestos (others, asbestos-containing sprayed rock wool, asbestos-containing fire-resistant coated sheet, etc.) , the treated aqueous solution of claim 1 is finely sprayed onto the asbestos surface in a thin form. injected into, holding the scattering of notwithstanding et asbestos give wet, at the stage which is entirely wetted, as a second stage, the aqueous treatment solution according to claim 2, in turn to the spray coarse, sufficiently asbestos surface Processing method to dissolve and dissolve asbestos by spraying. The same processing solution and claim 1 of the phosphate concentration 30~ 35 ± 5%, the process solution with improved reactivity in addition to the hydrogen peroxide content is 3-5%. The concentration of phosphoric acid 50 ± 5% same treated water solution and claim 2, the processing solution having improved reactivity in addition to the hydrogen peroxide content is 3-5%. A processing aqueous solution for storing a dissolving tank (tank) with a composition of 50 ± 10% phosphoric acid and approximately 10% hydrogen peroxide in order to dissolve asbestos and render it harmless . A treatment method wherein a solution of asbestos according to claim 6 is put in a dissolution tank (tank), asbestos waste etc. is thrown in and gently stirred with a stirrer to continuously dissolve and treat asbestos. A treatment method of applying plaster, mortar, gypsum mortar or the like to harden the residue of dissolved asbestos after treatment according to claim 1 and claim 2 without carrying out peeling treatment on purpose. .