基于熔剂性球团的高铬型钒钛磁铁矿高炉全球团炉料结构优化及软化–熔化行为

陈泊键; 姜涛; 温婧; 杨广东; 余唐霞; 朱凤湘; 胡鹏

doi:10.1007/s12613-023-2719-1

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文章导航 > 矿物冶金与材料学报（英文） > 2024 > 31(3): 498-507

Bojian Chen, Tao Jiang, Jing Wen, Guangdong Yang, Tangxia Yu, Fengxiang Zhu, and Peng Hu, High-chromium vanadium–titanium magnetite all-pellet integrated burden optimization and softening–melting behavior based on flux pellets, Int. J. Miner. Metall. Mater., 31(2024), No. 3, pp. 498-507. https://doi.org/10.1007/s12613-023-2719-1

Cite this article as:

Bojian Chen, Tao Jiang, Jing Wen, Guangdong Yang, Tangxia Yu, Fengxiang Zhu, and Peng Hu, High-chromium vanadium–titanium magnetite all-pellet integrated burden optimization and softening–melting behavior based on flux pellets, Int. J. Miner. Metall. Mater., 31(2024), No. 3, pp. 498-507. https://doi.org/10.1007/s12613-023-2719-1

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研究论文

基于熔剂性球团的高铬型钒钛磁铁矿高炉全球团炉料结构优化及软化–熔化行为

1)
东北大学冶金学院, 沈阳110819, 中国
2)
东北大学多金属矿产生态冶金教育部重点实验室, 沈阳110819, 中国
3)
辽宁省冶金传感器与技术重点实验室, 沈阳110819, 中国
4)
钒钛资源综合利用国家重点实验室, 攀枝花617000, 中国

通讯作者:
姜涛 E-mail: jiangt@smm.neu.edu.cn

温婧 E-mail: wenjing@smm.neu.edu.cn

文章亮点

(1) 获得了70%熔剂性球团和30%酸性球团的最优全球团炉料结构。

(2) 对比分析了单一球团和组合球团的软化–熔化行为。

(3) 明确了高铬型钒钛磁铁矿和普通铁矿、碱度之间的偏析是综合炉料获得较优软化–熔化性能的主要原因。

中文摘要

高铬型钒钛磁铁矿是待开发的重要多金属伴生资源，目前高炉炼铁是高效利用它的有效途径之一。全球团炉料结构是高炉减少CO₂排放量的未来发展的趋势之一。本研究结合钒钛高炉的生产数据，对高铬型钒钛磁铁矿全球团炉料结构的软化–熔化行为进行了探索并获得了最优的全球团炉料结构。结果表明，70%熔剂型球团与30%酸性球团矿的炉料结构获得了较好的软化–熔化性能。与单一炉料相比，该炉料方案的软化–熔化特征温度更高，软熔区间从307°C先升高至362°C后降低至282°C，最大压差由26.76 kPa降低至19.01 kPa，透气性指数由4643.5 kPa·°C降低至2446.8 kPa·°C。综合炉料的软化–熔化性能提升明显。软化过程中酸性球团起到抵抗载荷的作用，熔化过程中组合炉料中的熔剂型球团表现出更高的渣系熔点，达到提高熔化特征温度的效果。渣系成分的均质性和部分炉渣过还原产生的TiC导致了单一炉料透气性的恶化。综合炉料中高铬型钒钛磁铁矿和普通铁矿间的偏析以及酸性球团和熔剂性球团间的偏析是综合炉料软化–熔化性能较优的主要原因。

关键词:

Research Article

High-chromium vanadium–titanium magnetite all-pellet integrated burden optimization and softening–melting behavior based on flux pellets

+ Author Affiliations

1)
School of Metallurgy, Northeastern University, Shenyang 110819, China
2)
Key Laboratory for Ecological Metallurgy of Multimetallic Mineral (Ministry of Education), Northeastern University, Shenyang 110819, China
3)
Liaoning Key Laboratory for Metallurgical Sensor and Technology, Shenyang 110819, China
4)
State key laboratory of vanadium and titanium resources comprehensive utilization, Panzhihua 617000, China

On behalf of all authors, the corresponding authors state that there is no conflict of interest.

Corresponding authors:
Tao Jiang E-mail: jiangt@smm.neu.edu.cn

Jing Wen E-mail: wenjing@smm.neu.edu.cn
Received: 4 July 2023; Revised: 24 July 2023; Accepted: 7 August 2023; Available online: 10 August 2023

Abstract

Abstract

High-chromium vanadium–titanium magnetite (HVTM) is a crucial polymetallic-associated resource to be developed. The all-pellet operation is a blast furnace trend that aims to reduce carbon dioxide emissions in the future. By referencing the production data of vanadium–titanium magnetite blast furnaces, this study explored the softening–melting behavior of high-chromium vanadium–titanium magnetite and obtained the optimal integrated burden based on flux pellets. The results show that the burden with a composition of 70wt% flux pellets and 30wt% acid pellets exhibits the best softening–melting properties. In comparison to that of the single burden, the softening–melting characteristic temperature of this burden composition was higher. The melting interval first increased from 307 to 362°C and then decreased to 282°C. The maximum pressure drop (ΔP_max) decreased from 26.76 to 19.01 kPa. The permeability index (S) dropped from 4643.5 to 2446.8 kPa·°C. The softening–melting properties of the integrated burden were apparently improved. The acid pellets played a role in withstanding load during the softening process. The flux pellets in the integrated burden exhibited a higher slag melting point, which increased the melting temperature during the melting process. The slag homogeneity and the TiC produced by over-reduction led to the gas permeability deterioration of the single burden. The segregation of the flux and acid pellets in the HVTM proportion and basicity mainly led to the better softening–melting properties of the integrated burden.
- high-chromium vanadium–titanium magnetite;
- softening–melting properties;
- all pellets integrated burden;
- flux pellets

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