ISSN:1003-8620

CN:42-1243/TF

主管:中信泰富特钢集团股份有限公司

主办:大冶特殊钢有限公司

特殊钢 ›› 2013, Vol. 34 ›› Issue (5): 44-46.

• 工艺技术 • 上一篇    下一篇

石灰石作为120 t顶底复吹转炉终点钢水调温剂的生产应用

解英明   

  1. 宝钢集团新疆八一钢铁股份公司第二炼钢厂,乌鲁木齐 830022
  • 收稿日期:2013-04-08 出版日期:2013-10-01 发布日期:2022-09-22
  • 作者简介:解英明(1974-),男,工程师,2008年辽宁科技大学毕业,炼钢和连铸工艺研究

Application of Limestone Used to Control End Temperature of Liquid in 120 t Top and Bottom Combined Blowing Converter

Xie Yingming   

  1. No2 Steelmaking Plant, Xinjiang Bayi Iron & Steel Co Ltd, Baosteel Group, Wulumuqi 830022
  • Received:2013-04-08 Published:2013-10-01 Online:2022-09-22

摘要: 经计算,对SP等低碳钢控制钢水终点温度的废钢比应不低于16%,但目前120 t转炉废钢供应只能达到13%,造成钢水终点温度偏高,影响炉衬寿命。经过分析,采用添加石灰石(/%:≥53.0CaO、≤1.2SiO2、≤0.040S、≤0.008P)调节转炉终点钢水温度。经54炉次生产实践表明,当添加500~1000 kg石灰石,钢水温度1660~1669℃时平均降温3.6~8.0℃,1 670~1 679℃时,降温4.9~10.8℃,≥1680℃时降温9.0~20.0℃;加石灰石的钢水平均脱磷率为83%,与铁矿石的平均脱磷率(87%)基本相当。

关键词: 顶底复吹转炉, 废钢, 石灰石, 终点温度控制, 工艺实践

Abstract: According to calculation, for SP etc. low carbon steels the adding scrap ratio to control converter liquid end temperature is no less than 16% , but present scrap supply for 120 t converter is only up to 13% , led to liquid end temperature higher to effect lining life. According to analysis, the end temperature of liquid in converter is adjusted and controlled by adding limestore (/% : ≥53.0CaO, ≤1.2SiO2, ≤0.40S, ≤0.008P). The production practice with 54 heats show that as adding 500-1000 kg limestone with liquid temperature 1 660-1669 Y , liquid average temperature dropped by 3.6-8.0 ℃ , 1670-1679 °C , dropped by 4.9-10.8 P , and m 1680 ℃ , dropped by 9.0-20.0 ℃ ; by adding limestone the average liquid dephosphorizing ratio is 83% , it is basically about equal to the dephosphorizing ratio (87% ) by adding iron ore.

Key words: Top and Bottom combined Blowing Converter, Scrap, Limestone, Control of End Temperature, Practice of Process