Optimization Dephosphorization Process of the Early Stage in 300t Steelmaking Converter with Top and Bottom Combined Blowing

被引：0
|
作者：
Feng, Chao [1 ,2 ]
Zhu, Rong [1 ,2 ]
Han, Baochen [1 ,2 ]
Dong, Kai [1 ,2 ]
Li, Weifeng [1 ,2 ]
Wei, Guangsheng [1 ,2 ]
机构：
[1] Univ Sci & Technol Beijing, Sch Met & Ecol Engn, Beijing 100083, Peoples R China
[2] Univ Sci & Technol Beijing, Beijing Key Lab Res Ctr Special Melting & Prepara, Beijing 100083, Peoples R China
来源：
11TH INTERNATIONAL SYMPOSIUM ON HIGH-TEMPERATURE METALLURGICAL PROCESSING | 2020年
关键词：
Slag; Dephosphorization rate; Basicity; HOT METAL; SYSTEM;
D O I：
10.1007/978-3-030-36540-0_11
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of oxygen supply systems and slag composition on dephosphorization rate in the early stage of smelting was studied. Metal samples, slag samples, and molten steel temperatures of a 300t converter at different smelting stages were analyzed. The alkalinity of slag was found to be the lowest at 1.33 during the early stage of the experiment, superheat was 7 degrees C, the mass fraction of C3MS2 phase was 35 wt%, and average dephosphorization rate was 32.2%. By optimizing the oxygen supply system and charging system of the converter, the alkalinity of slag was controlled in the range of 1.6-2.1 and the average content of T.Fe was 15 wt%. The results demonstrated a 10.2% increasment in dephosphorization rate during the early stage of smelting, 5.9% increasment in the scrap steel ratio, 31 degrees C increasment in the tapping temperature, and 0.65% increasment in the final dephosphorization rate.
引用
收藏
页码：115 / 122
页数：8
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