Alkali Fusion-Leaching Method for Comprehensive Processing of Fly Ash
| Autor: | I. V. Loginova, D. A. Rogozhnikov, L. I. Chaikin, A. A. Shoppert |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
ALKALI FUSION
Materials science Carbonation DESILICATION Mullite 02 engineering and technology CARBONIZATION FLY ASH 01 natural sciences SODALITE chemistry.chemical_compound Specific surface area 0103 physical sciences COMPREHENSIVE UTILIZATION 010302 applied physics Waste management Carbonization Hematite 021001 nanoscience & nanotechnology chemistry Chemical engineering Fly ash visual_art Sodalite visual_art.visual_art_medium Leaching (metallurgy) 0210 nano-technology SILICA WHITE |
| Zdroj: | KNE Materials Science |
| Popis: | Fly ash, composed of mullite, hematite, amorphous silica and quartz, is a promising source for the recovery of alumina and silica. Desilication with help of NaOH and alkali fusion-leaching method and utilization of alumina and silica in the fly ash for preparation of sodalite and silica white were explored in this research. The samples were characterized by using wet chemical analysis and X-ray diffraction. The optimal extraction of SiO2 from Reftinskaya power plant fly ash was 46.2% with leaching at 95 oC for 3 h. Sodalite was synthesized at 200 °C for 1 h followed water leaching at 95 °C for 1 h. Silica white with specific surface area 180-220 m2/g was prepared by carbonation of the Na2SiO3 solution at 40 oC for 90-120 min. The as-prepared silica has a purity of 98,8%.The proposed method is suitable for the comprehensive utilization of the fly ash. |
| Databáze: | OpenAIRE |
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