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›› 2011, Vol. 11 ›› Issue (6): 943-950.

• 反应与分离 • 上一篇    下一篇

鱼雷罐中铁水预处理喷粉脱锰的动力学模型

朱诚意 李光强 陈兆平 夏幸明 洪小杰   

  1. 武汉科技大学钢铁冶金及资源利用教育部重点实验室 武汉科技大学 钢铁冶金与资源利用省部共建教育部重点实验室 宝山钢铁股份有限公司研究院 宝山钢铁股份有限公司研究院 武汉科技大学钢铁冶金及资源利用教育部重点实验室
  • 收稿日期:2011-12-13 修回日期:1900-01-01 出版日期:2011-12-20 发布日期:2011-12-20
  • 通讯作者: 朱诚意

Kinetic Modeling of Molten Iron Demanaganization with Flux Injection in a Torpedo-shaped Furnace

ZHU Cheng-yi LI Guang-qiang CHEN Zhao-ping XIA Xing-ming HONG Xiao-jie   

  1. Key Laboratory of Ferrous Metallurgy and Resources Utilization, Ministry of Education, Wuhan University of Science and Technology Key Laboratory of Ferrous Metallurgy and Resources Utilization, Ministry of Education, Wuhan University of Science and Technology Baoshan Iron & Steel Co. , Ltd. Scientific Research and Development Institution of Baosteel Co., Ltd. Key Laboratory of Ferrous Metallurgy and Resources Utilization, Ministry of Education, Wuhan University of Science and Technology
  • Received:2011-12-13 Revised:1900-01-01 Online:2011-12-20 Published:2011-12-20
  • Contact: ZHU Cheng-yi

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被引次数

4

摘要： 基于耦联反应模型，建立了在鱼雷罐中，采用氧化性渣并考虑粉剂穿透比、停留时间和熔池均混时间对脱锰影响的铁水预处理喷粉脱锰动力学模型，并对其做了验证. 模拟实际生产条件的模型计算结果表明，将含58.5%FeO、碱度为0.85的粉剂以400 kg/min的加料速率与10 Nm3/min的O2载气喷入1623 K的250 t铁水中，处理2~3 min后，铁液中硅很快降到最低水平. 当硅含量降低到小于0.3%时，脱锰速率逐渐增大；当处理6~7 min时，熔池中锰含量降低到小于0.1%，达到最低水平，可满足低锰钢对锰含量的要求. 在相同计算条件下，脱硅速率大于脱锰速率；喷吹处理过程中存在一定程度的脱碳，但铁水中磷含量基本不变. 在保证粉剂全部成渣，与铁液充分接触且参与反应的条件下，减小粉剂颗粒粒径到25 mm，增加喷枪插入深度到1.6 m，增大粉剂喷吹速度到400 kg/min，适当提高渣中的FeO含量和降低铁水中的硅含量均有利于提高脱锰速率.

关键词: 铁水预处理, 鱼雷罐, 脱锰, 喷粉, 动力学模

Abstract: Based on the coupled reaction model, a kinetic model was developed for hot metal demanganization with flux injection in a torpedo-shaped furnace using oxidation slag, considering the effects of penetration ratio and residence time of the injected flux, mixing time of the hot metal bath on demanganization rate, and then the model was validated. The calculated results obtained by simulating the actual process using this model show that when the powder containing 58.5% FeO and basicity controlled at 0.85 carried by oxygen with 10 Nm3/min flow rate is injects into 250 t hot metal at 1623 K and the injection rate controlled at 400 kg/min, silicon content in hot metal decreases to the lowest level after treatment for 2~3 min. Demanganization rate increases gradually only silicon content in hot metal decreases below 0.3%. Manganese content decreases to the value below 0.1% which is the lowest level in the present bath after treatment for 6~7 min, which can meet the requirements of low manganese steel. Desiliconization rate is higher than that of demanaganization under the calculation conditions, and decarburization is observed, while phosphorus content is nearly not changed. The demanganization is enhanced by decreasing the particles size of injected flux to 25 mm, increasing the immersion depth of lance to 1.6 m, increasing powder supply rate to 400 kg/min, increasing FeO content in the flux suitably and decreasing silicon content to a certain level before demanganization when the powder is ensured to contact with hot metal fully as well as avoid agglomerating and blowing out of the bath.

Key words: hot metal pretreatment, torpedo-shaped furnace, demanganization, flux injection, kinetic model

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