Abstract：The thermodynamic analysis of dephosphorization of BOF slag by carbothermal reduction was studied， and many experimental studies were carried out in the molybdenum disilicide high-temperature heat treatment resistance furnace and the 500 kg top and bottom combined blowing multifunctional furnace. The results indicated that reaction temperature and dynamic condition had significant effects on the dephosphorzition rate. In the high temperature heat treatment resistance furnace， 1 500 ℃ reaction temperature can be guaranteed and about 30% dephosphorzition rate can be reached under the condition of carbon equivalent 3.0 and 30 min holding time. In the top and bottom combined blowing multifunctional furnace， coke powder can be used as reduction material and heating-up material. Dephosphorization reaction processing under the high temperature can be guaranteed by the exothermal reaction between coke powder and oxygen. Meanwhile， the top-blowing oxygen agitated the molten slag layer， which benefit to increasing the dephosphorization rate more， dephosphorization rate reached 84% in the whole process， thereinto， dephosphorization rate in the molten pool was 75.85%， dephosphorization rate of evapouration was 8.15%. 10.8% sulphur carried by coke powder entered the molten steel and 6.25% entered the molten slag.
收稿日期: 2015-07-03
出版日期: 2016-04-26
引用本文:
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2016, Vol. 51 
