Tohoku University · Engineering
Professor Huafang Yu's research lab specializes in metallurgical materials and resource recovery, with a focus on the crystal chemistry and carbothermic reduction behavior of calcium silicate–phosphate solid solutions found in steelmaking slag. The lab investigates the transformation mechanisms and thermodynamic properties of Ca2SiO4–Ca3P2O8 systems to enable efficient phosphorus recovery and reuse. A key research direction involves optimizing carbothermic processes for phosphorus extraction from steelmaking slag under controlled conditions, aiming to develop sustainable solutions for secondary resource utilization in the steel industry.
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
Open papers in the app to read, cite, and organize with AI.
