Production of low phosphorous steel from low silicon high phosphorous hot metal in BOF

被引：4

作者：

Gupta, Prakash ^{[1
,2
]}

Kumar, Sujeet ^{[1
]}

Babu, Jallu Hari ^{[1
]}

Mali, Gopal Shantaram ^{[1
]}

Roy, Tapas Kumar ^{[1
]}

机构：

[1] Tata Steel Ltd, Jamshedpur, Jharkhand, India

[2] Tata Steel Ltd, Tata Steel R&D, Jamshedpur 831001, Jharkhand, India

来源：

IRONMAKING & STEELMAKING | 2023年 / 50卷 / 08期

关键词：

Basic oxygen furnace; dephosphorization; hot metal; slag basicity; free lime; low silicon; STEELMAKING;

D O I：

10.1080/03019233.2023.2173877

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Production of low phosphorous (<= 0.015%) steel in Basic Oxygen Furnace (BOF) using high phosphorous (average 0.17%) and low silicon (<= 0.5%) hot metal with Si/P ratio <3 is a challenging task. In addition to temperature, slag basicity and FeO, the quantity of slag becomes important which is achieved by higher lime addition. However, how much lime is appropriate need to be understood. A detailed analysis of plant data indicated that a scope exists for lowering lime addition from existing level. Accordingly, systematic trials were conducted with reduction in lime which showed that lowering 12% lime had no effect while 19% reduction increased end blow (EB) P by 20 ppm. SEM-EDX studies of slag samples revealed chemical and morphological changes in trial heats. Lime addition pattern was also found to impact EB P. Addition of lime in a small batch during 10-25% of the oxygen blow resulted lower EB P.

引用

页码：1014 / 1021

页数：8