東北大学 · 工学
華芳宇教授の研究室では、鋼鉱スラグに含まれるCa₂SiO₄–Ca₃P₂O₈固溶体の構造と反応挙動を解明し、スラグからのリンの回収と脱リンプロセスのメカニズムを追求しています。特に、カーボセラミック還元を用いたリンの効率的回収技術の開発が中心であり、高温反応挙動と結晶構造の変化を詳細に分析しています。
Figures are computed from collected data and may differ slightly.
The crystallography of the Ca2SiO4-Ca3P2O8 solid solutions in the dephosphorization slag in current steelmaking process was determined in this study. Understanding the physical and chemical properties of these Ca2SiO4-Ca3P2O8 solid solutions is a preliminary step towards understanding the role of the Ca2SiO4-Ca3P2O8 solid solutions in the dephosphorization process. The range of Ca3P2O8 in the Ca2SiO4-Ca3P2O8 solid solutions synthesized for analysis varied from 10 to 90 mol pct, with an increment
Steelmaking slag is considered as a promising phosphorus resource as it contains the phosphorus in a condensed phase of Ca2SiO4–Ca3P2O8 solid solution (C2S–C3P)ss. In the present study, the carbothermic reduction of (C2S–40 mol% C3P)ss at 1573 K was carried out to understand the phosphorus removal mechanism by varying reduction temperature, external gas flow rate, amount of graphite, and concentration of Ca3P2O8 in (C2S–C3P)ss. The carbothermic reduction proceeded as a zero-order reaction when t
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