Thermodynamic properties of the BaO-MnO flux system

Journal Article · Thu Apr 01 04:00:00 EST 1993 · Metallurgical Transactions, B (Process Metallurgy); (United States)

DOI:https://doi.org/10.1007/BF02659136· OSTI ID:6485090

Shim, Sang Chul; Tsukihashi, Fumitaka; Sano, Nobuo ^[1]

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1. Univ. of Tokyo (Japan)

Although a great number of works on BaO-bearing fluxes for refining Fe-Cr and Fe-Mn alloys have been carried out, there still remain several unresolved problems on using them in the refining process. The principal aim of the present study is to understand the thermodynamic properties of the BaO-MnO system, which has been shown to be very effective for dephosphorization of Fe-Mn alloys. The activity of manganese oxide in the BaO-MnO flux was measured at 1,573 and 1,673 K by equilibrating the flux, a Ag-Mn alloy, and a gas mixture of CO and CO[sub 2] as functions of the flux composition and temperature. The influence of BaF[sub 2], which is an effective additive for lowering the melting temperature of the flux, on the thermodynamics of the BaO-MnO system, including the solubility of MnO in the BaO-BaF[sub 2] system, was also investigated.

• OSTI ID: 6485090
• Journal Information: Metallurgical Transactions, B (Process Metallurgy); (United States), Journal Name: Metallurgical Transactions, B (Process Metallurgy); (United States) Vol. 24B:2; ISSN MTTBCR; ISSN 0360-2141
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360606* -- Other Materials-- Physical Properties-- (1992-)
ADDITIVES
ALKALINE EARTH METAL COMPOUNDS
ALLOYS
BARIUM COMPOUNDS
BARIUM FLUORIDES
BARIUM OXIDES
CHALCOGENIDES
CHROMIUM ALLOYS
ELEMENTS
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
IRON ALLOYS
MANGANESE ALLOYS
MANGANESE COMPOUNDS
MANGANESE OXIDES
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PHOSPHORUS
PHYSICAL PROPERTIES
PROCESSING
REFINING
REMOVAL
SOLUBILITY
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS