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Effect of Fluorspar and Industrial Wastes (Red Mud and Ferromanganese Slag) on Desulfurization Efficiency of Molten Steel
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- Jeong, Tae Su (author)
- Department of Materials Engineering, Hanyang University, Ansan, 15588, Korea
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- Park, Joo Hyun (author)
- KTH,Materialvetenskap
- (creator_code:org_t)
- 2020-06-23
- 2020
- English.
- In: Metallurgical and materials transactions. B, process metallurgy and materials processing science. - : Springer. - 1073-5615 .- 1543-1916. ; 51:5, s. 2309-2320
- Journal article (peer-reviewed)
Abstract
Subject headings
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- Fluorspar (CaF2) has been widely used to control the physicochemical properties of slag in steelmaking processes. However, it is very important to reduce the CaF2 consumption because it causes various environmental problems. In the current study, therefore, the effect of industrial waste materials such as red mud (RM) and ferromanganese slag (FMS) on the desulfurization behavior of molten steel was investigated to find potential substitutes for fluorspar. Compared to conventional 10 pct CaF2-containing ladle slag, when excess industrial wastes were added (i.e., more than 10 mass pct), the composition of the slag was dramatically changed (SiO2 increases, while FetO and MnO decrease). Therefore, the sulfide capacity of the slag decreased, and the viscosity of the slag increased. Thus, the desulfurization efficiency was also reduced. However, when the RM or FMS were added not more than 10 mass pct to lean-CaF2 (3 pct) slag, the sulfide capacity of the slag was equivalent to 10 pct CaF2-containing ladle slag; thus, the desulfurization efficiency was also equivalent with lower melting point and higher fraction of liquid phase. Consequently, it was confirmed that a small amount (less than 10 mass pct) of industrial wastes can be added as a desulfurization fluxing agent as a partial substitute for fluorspar.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Metallurgi och metalliska material (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Metallurgy and Metallic Materials (hsv//eng)
Keyword
- Calcium fluoride
- Desulfurization
- Efficiency
- Ferroalloys
- Fluorspar
- Iron ores
- Ladles
- Manganese oxide
- Molten materials
- Oxide minerals
- Physicochemical properties
- Silica
- Steel foundry practice
- Sulfur compounds
- Desulfurization behavior
- Desulfurization efficiency
- Environmental problems
- Ferromanganese slag
- Fluxing agents
- Liquid Phase
- Steelmaking process
- Sulfide capacity
- Slags
Publication and Content Type
- ref (subject category)
- art (subject category)
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