Influence of additives on sulfide capacity of CaO-CaF sub 2 -SiO sub 2 slags
- Siderurgica Paulista, Cosipa (BR)
- Univ. of Tokyo, 7-22-1 Roppongi, Minoto-ku, 106 Tokyo (JP)
In most Japanese integrated steelmaking plants, hot metal pretreatment is a common practice, because the combination of the pretreatment with the combined blowing converter minimized the production cost of high-quality steel. The CaO-CaF{sub 2}-SiO{sub 2} system containing low SiO{sub 2} is an excellent slag for desulfurization, as reported elsewhere. In the actual hot metal pretreatment, the oxides, such as alumina, magnesia, and manganese oxide, are inevitable because of the erosion of refractory or residues in previous processes. Sometimes even additions of such oxides are made in the pretreatment. Therefore, it is of practical importance to know how these additives or contaminants affect the desulfurization capacity of slags. In the paper, the influences of Na{sub 2}O, Al{sub 2}O{sub 3}, MgO, and MnO on the sulfide capacity of CaO-CaF{sub 2}-SiO{sub 2} slags were studied. The addition of Na{sub 2}O was also investigated to understand how it enhanced the sulfide capacity. Emphasis was given to slags of CaO-saturated composition, not only because they have the highest sulfide capacity but also because of the presence of excess CaO in the commercial slags.
- OSTI ID:
- 6076266
- Journal Information:
- Metallurgical Transactions, B (Process Metallurgy); (United States), Journal Name: Metallurgical Transactions, B (Process Metallurgy); (United States) Vol. 21:6; ISSN 0360-2141; ISSN MTTBC
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
320305* -- Energy Conservation
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& Utilization-- Industrial & Agricultural Processes-- Industrial Waste Management
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
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54 ENVIRONMENTAL SCIENCES
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Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
ADDITIVES
AIR POLLUTION CONTROL
ALKALINE EARTH METAL COMPOUNDS
ALLOYS
CALCIUM COMPOUNDS
CALCIUM FLUORIDES
CALCIUM HALIDES
CHALCOGENIDES
CHEMICAL REACTIONS
CONTROL
CONVERSION
DESULFURIZATION
ENERGY CONVERSION
FABRICATION
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
HOT WORKING
INDUSTRIAL WASTES
INDUSTRY
IRON ALLOYS
IRON BASE ALLOYS
MANUFACTURING
MATERIALS WORKING
METAL INDUSTRY
POLLUTION CONTROL
STEELS
SULFIDES
SULFUR COMPOUNDS
WASTES