High value-added technology of molten blast furnace slag using unutilized waste heat

2014 Fiscal Year Final Research Report

• Project/Area Number: 24710086
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Environmental technology/Environmental materials
• Research Institution: Chiba University (2013-2014); Akita University (2012)
• Principal Investigator: WAJIMA Takaaki 千葉大学, 工学(系)研究科(研究院), 准教授 (00380808)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 鉄鋼スラグ / 未利用廃熱 / アルカリ溶融 / 機能性素材 / ハイドロカルマイト / 炭酸ナトリウム / ケイ酸ナトリウム / 酸化カルシウム

Outline of Final Research Achievements

In this study, we attempted to convert molten blast furnace slag into functional materials via alkali fusion using unutilized waste heat. With addition of sodium carbonate, blast furnace slag molten at 1500 oC can be converted into alkali fused materials with high reactivity, and fused materials can be converted into functional materials, such as hydrocalumite, hydrogarnet, hydroxysodalite, zeolite-A and zeolite-X. The product including hydrocalumite can be synthesized from fused material in distilled water at room temperature, and has high removal ability for phosphate from aqueous solution. The product including hydrogarnet can be synthesized in distilled water at 80 oC, and those including zeolites can be synthesized in distilled water with addition of EDTA at 80oC.

Free Research Field

資源循環工学