Abstract
We propose a novel process to recycle Mn from steelmaking slag. The first step is to sulfurize the slag, producing a liquid sulfide phase (matte) without P. High-purity Fe-Mn alloys can then be made by desulfurizing the matte. However, to our knowledge, there have been no reports to date concerning the sulfurization of P and Mn contained in molten slag. Therefore, knowledge of the distribution of Fe, Mn and P between the matte and the molten slag is required to determine the feasibility of this process. In this study, the equilibrium distributions of Mn, Fe, Ca and P between a FeS-MnS matte and FeO-MnO-SiO 2-MgO-P 2O 5 slag with/without CaO are investigated under controlled partial pressures of oxygen and sulfur. It was found, as P is not present in the matte, that a separation of P from Mn was accomplished. The increament of (CaOCMgO)/SiO 2 in slag can improve the concentrations of Mn and Fe in the matte. The content of Ca in the matte was less than 2 mass%, even when the concentration ratio of CaO/SiO 2 in the slag was unity.
| Original language | English |
|---|---|
| Pages (from-to) | 425-434 |
| Number of pages | 10 |
| Journal | High Temperature Materials and Processes |
| Volume | 30 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2011 Aug |
| Externally published | Yes |
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Keywords
- Activity coefficient
- Distribution
- FeS
- Manganese
- MnS
- P
- P
- Phosphorus
- Recycling
- Separation
- Steelmaking slag
- Sulfurization
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Physical and Theoretical Chemistry
- Mechanics of Materials
Cite this
Novel recycling process of Mn by sulfurization of molten slag from a by-product of steelmaking process. / Kim, Sun Joong; Shibata, Hiroyuki; Maruoka, Nobuhiro; Kitamura, Shinya; Yamaguchi, Katsunori.
In: High Temperature Materials and Processes, Vol. 30, No. 4, 08.2011, p. 425-434.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Novel recycling process of Mn by sulfurization of molten slag from a by-product of steelmaking process
AU - Kim, Sun Joong
AU - Shibata, Hiroyuki
AU - Maruoka, Nobuhiro
AU - Kitamura, Shinya
AU - Yamaguchi, Katsunori
PY - 2011/8
Y1 - 2011/8
N2 - We propose a novel process to recycle Mn from steelmaking slag. The first step is to sulfurize the slag, producing a liquid sulfide phase (matte) without P. High-purity Fe-Mn alloys can then be made by desulfurizing the matte. However, to our knowledge, there have been no reports to date concerning the sulfurization of P and Mn contained in molten slag. Therefore, knowledge of the distribution of Fe, Mn and P between the matte and the molten slag is required to determine the feasibility of this process. In this study, the equilibrium distributions of Mn, Fe, Ca and P between a FeS-MnS matte and FeO-MnO-SiO 2-MgO-P 2O 5 slag with/without CaO are investigated under controlled partial pressures of oxygen and sulfur. It was found, as P is not present in the matte, that a separation of P from Mn was accomplished. The increament of (CaOCMgO)/SiO 2 in slag can improve the concentrations of Mn and Fe in the matte. The content of Ca in the matte was less than 2 mass%, even when the concentration ratio of CaO/SiO 2 in the slag was unity.
AB - We propose a novel process to recycle Mn from steelmaking slag. The first step is to sulfurize the slag, producing a liquid sulfide phase (matte) without P. High-purity Fe-Mn alloys can then be made by desulfurizing the matte. However, to our knowledge, there have been no reports to date concerning the sulfurization of P and Mn contained in molten slag. Therefore, knowledge of the distribution of Fe, Mn and P between the matte and the molten slag is required to determine the feasibility of this process. In this study, the equilibrium distributions of Mn, Fe, Ca and P between a FeS-MnS matte and FeO-MnO-SiO 2-MgO-P 2O 5 slag with/without CaO are investigated under controlled partial pressures of oxygen and sulfur. It was found, as P is not present in the matte, that a separation of P from Mn was accomplished. The increament of (CaOCMgO)/SiO 2 in slag can improve the concentrations of Mn and Fe in the matte. The content of Ca in the matte was less than 2 mass%, even when the concentration ratio of CaO/SiO 2 in the slag was unity.
KW - Activity coefficient
KW - Distribution
KW - FeS
KW - Manganese
KW - MnS
KW - P
KW - P
KW - Phosphorus
KW - Recycling
KW - Separation
KW - Steelmaking slag
KW - Sulfurization
UR - http://www.scopus.com/inward/record.url?scp=84860203441&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84860203441&partnerID=8YFLogxK
U2 - 10.1515/HTMP.2011.064
DO - 10.1515/HTMP.2011.064
M3 - Article
VL - 30
SP - 425
EP - 434
JO - High Temperature Materials and Processes
JF - High Temperature Materials and Processes
SN - 0334-6455
IS - 4
ER -