Effect of Direct Reduced Iron (DRI) on Dephosphorization of Molten Steel by Electric Arc Furnace Slag
- Title
- Effect of Direct Reduced Iron (DRI) on Dephosphorization of Molten Steel by Electric Arc Furnace Slag
- Author
- 박주현
- Keywords
- MGO SATURATED SLAGS; PHOSPHORUS DISTRIBUTION; PHOSPHATE CAPACITY; LIQUID-IRON; SYSTEM; NA2O; PARTITION
- Issue Date
- 2018-12
- Publisher
- SPRINGER
- Citation
- METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE, v. 49, No. 6, Page. 3381-3389
- Abstract
- We investigated the effectof direct reduced iron (DRI) addition on dephosphorization of molten steel by electric arc furnace (EAF) slag at 1823 K (1550 degrees C). Various phenomena such as CO gas evolution and slagmaking by gangue oxides in DRI were experimentally observed at each reaction step. Thermodynamic behaviors of phosphorus, oxygen, and carbon were strongly dependent on DRI content. Basicity, which is the thermodynamic driving force of dephosphorization, decreased with the increasing DRI content because SiO2 concentration in the slag was proportional to DRI addition. The excess free energy of P2O5 increased with the increasing SiO2 content in slag. A higher DRI content made dephosphorization difficult by decreasing the basicity and stability of P2O5 in the slag. Therefore, when using DRI in EAF process, it is very important to control the basicity of slag.
- URI
- https://link.springer.com/article/10.1007%2Fs11663-018-1406-5https://repository.hanyang.ac.kr/handle/20.500.11754/99155
- ISSN
- 1073-5615; 1543-1916
- DOI
- 10.1007/s11663-018-1406-5
- Appears in Collections:
- COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Articles
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