A thermodynamic study of BaO + BaCl[sub 2] + Cr[sub 2]O[sub 3] fluxes used for the removal of phosphorus from chromium-containing iron melts

Journal Article · Sat Oct 01 00:00:00 EDT 1994 · Metallurgical Transactions, B (Process Metallurgy); (United States)

OSTI ID:6897054

Inouye, T K; Fujiwara, H; Ichise, E; Iwase, M ^[1]

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1. Kyoto Univ. (Japan)

Electrochemical measurements with solid-oxide galvanic cell of the type Mo/Mo + MoO[sub 2]//ZrO[sub 2](MgO)//(Cu + Cr)[sub alloy] + (Cr[sub 2]O[sub 3])[sub slag]/Mo were conducted at 1,473 K in order to obtain the activities of Cr[sub 2]O[sub 3] in BaO + BaCl[sub 2] + Cr[sub 2]O[sub 3] slags used for dephosphorization of chromium-containing iron melts. Based on the activity measurements, it is concluded that in the system BaO + BaCl[sub 2] + Cr[sub 2]O[sub 3] at 1,473 K, there are 1 two-phase region in saturation with pure Cr[sub 2]O[sub 3](s) and 3 three-phase regions. The activities of Cr[sub 2]O[sub 3] within such three-phase regions decrease with an increase in BaO/BaCl[sub 2] mole ratios. The Cr[sub 2]O[sub 3] activities in BaO + BaCl[sub 2] + Cr[sub 2]O[sub 3] fluxes are, in general, greater than those in CaO + CaCl[sub 2] + Cr[sub 2]O[sub 3], corresponding to much more effective dephosphorization by BaO + BaCl[sub 2] + Cr[sub 2]O[sub 3] fluxes rather than CaO + CaCl[sub 2] + Cr[sub 2]O[sub 3] slag.

• OSTI ID: 6897054
• Journal Information: Metallurgical Transactions, B (Process Metallurgy); (United States), Vol. 25:5; ISSN 0360-2141
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
BARIUM CHLORIDES
THERMODYNAMIC PROPERTIES
BARIUM OXIDES
CHROMIUM OXIDES
PHOSPHORUS
REMOVAL
STAINLESS STEELS
PURIFICATION
CALCIUM CHLORIDES
CALCIUM OXIDES
CHROMIUM ALLOYS
ELECTROCHEMICAL CELLS
ELECTROLYSIS
FABRICATION
IRON ALLOYS
LIQUID METALS
PHASE STUDIES
ALKALINE EARTH METAL COMPOUNDS
ALLOYS
BARIUM COMPOUNDS
CALCIUM COMPOUNDS
CALCIUM HALIDES
CHALCOGENIDES
CHLORIDES
CHLORINE COMPOUNDS
CHROMIUM COMPOUNDS
ELEMENTS
FLUIDS
HALIDES
HALOGEN COMPOUNDS
HIGH ALLOY STEELS
IRON BASE ALLOYS
LIQUIDS
LYSIS
METALS
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
STEELS
TRANSITION ELEMENT COMPOUNDS
360101* - Metals & Alloys- Preparation & Fabrication
400400 - Electrochemistry