炼钢 ›› 2015, Vol. 31 ›› Issue (3): 74-78.

• 辅助技术、材料及设备 • 上一篇    

转炉石灰石造渣留渣操作工艺实践

杜玉涛   

  1. 1.北京科技大学 冶金与生态工程学院, 北京 100083;2.河北钢铁集团 石家庄钢铁有限责任公司,河北 石家庄 050031
  • 收稿日期:2014-07-08 修回日期:2014-07-27 接受日期:1900-01-01 出版日期:2015-06-05 发布日期:2015-06-08
  • 通讯作者: 杜玉涛 E-mail:dyt-2002@163.com

The application of the slag making and return-slag operation by limestone in converter

  • Received:2014-07-08 Revised:2014-07-27 Accepted:1900-01-01 Online:2015-06-05 Published:2015-06-08

摘要: 对石灰石造渣技术进行了理论分析,研究了留渣操作原理和安全留渣条件,在河北钢铁集团石家庄钢铁有限责任公司转炉进行了转炉石灰石造渣留渣操作工艺的生产实践,取得了一定效果。实践结果表明,转炉石灰石造渣与留渣操作工艺结合使用,能实现提高脱磷效率、保证转炉脱磷效果、提高钢水的质量、降低生产工艺成本等良好效果;与常规不留渣操作工艺相比,采用石灰石造渣留渣操作工艺,可以降低钢铁料消耗6kg/t、降低渣料消耗25kg/t、 提高转炉终点T一次命中率11%、降低终点磷质量分数0.003%,提高终点碳质量分数0.06%,成本可降低19.7元/t。

关键词: 石灰石造渣, 留渣操作, 冶金效果, 脱磷

Abstract: The technology of slag making and the return-slag operation by limestone was analyzed in this paper, which has been applied in Shijiazhuang Iron & Steel Co., Ltd., Hebei Iron and Steel Group and met the industrial requirements. The results showed that the technology could increase dephosphorizing rate, improve the quality of steel, and reduce smelting cost in converter steelmaking process. Contrast with conventional technology, the consumption of steel material of the new technology is dropped by 6 kg/t, slag is reduced by 25kg/t, the first hit-rate of temperature at steelmaking end-point is 11%, phosphorus content of endpoint is decreased by 0.003%, carbon content is increased by 0.06%, and the smelting cost is reduced by 19.7 yuan/t.

Key words: limestone slag forming, remaining slag operation, metallurgical effects, dephosphorization