Effect of Fluorspar and Industrial Wastes (Red Mud and Ferromanganese Slag) on Desulfurization Efficiency of Molten Steel
| Autor: | Joo Hyun Park, Tae Su Jeong |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Sulfide 0211 other engineering and technologies 02 engineering and technology 01 natural sciences Ferromanganese Industrial waste 0103 physical sciences Materials Chemistry 021102 mining & metallurgy 010302 applied physics chemistry.chemical_classification Ladle business.industry Metallurgy Metals and Alloys Slag Condensed Matter Physics Steelmaking Red mud Flue-gas desulfurization chemistry Mechanics of Materials visual_art visual_art.visual_art_medium business |
| Zdroj: | Metallurgical and Materials Transactions B. 51:2309-2320 |
| ISSN: | 1543-1916 1073-5615 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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