酸化鉄を多量に含む焼却灰とガラス廃棄物の加熱混合による安定固形化物の生成

概要

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Solidified ash products were obtained by mixing and heating of powdered bottom Fe_3O_4-rich ash and glass waste paste in an inclined rotary incinerator. The chemical composition and structure of the product were analyzed by X-ray diffraction(XRD), scanning electron microscope/energy dispersive X-ray spectrometer(SEM/EDX), Fourier transformation infrared spectroscopy(FT-IR), and X-ray photoelectron spectroscopy(XPS). The bulk sample mainly consisted of Fe_3O_4 and NaAlSiO_4, and glassy grain boundaries, which strongly bonded the ash to form a solid product. On the other hand, the surface of the product was covered by a Fefree glassy layer of 〜10 μm in thickness. The glassy surface layer was effective in preventing the dissolution of heavy metals(Pb, Cr)into aqueous acid solutions(2<pH<7).
社団法人日本セラミックス協会の論文
2000-07-01