高铁低硅烧结技术发展动态

支建明; 李杰; 李飞; 李大亮; 杨爱民

doi:10.3969/j.issn.1000-6532.2022.01.015

高铁低硅烧结技术发展动态

1.
华北理工大学冶金与能源学院, 河北　唐山　063210

2.
山西建龙实业有限公司, 山西　运城　043801

基金项目: 国家自然科学基金（51674121）；河北省优秀青年科学基金项目（E2018209248）

详细信息

作者简介: 支建明（1996-），男，硕士生

通讯作者: 杨爱民（1978-），男，教授，博士生导师，E-mail：aimin@ncst.edu.cn

中图分类号: TD951；TF044

收稿日期: 2020-04-01

修回日期: 2020-04-17

刊出日期: 2022-02-25

Development Trends of High-Silicon Low-silicon Sintering Technology

1.
School of Metallurgy and Energy, North China University of Science and Technology, Tangshan, Hebei, China

2.
Shanxi Jianlong Industry Co., Ltd., Yuncheng, Shanxi, China

More Information

Corresponding author: Yang Aimin, aimin@ncst.edu.cn

Received Date: 01 April 2020

Revised Date: 17 April 2020

Publish Date: 25 February 2022

摘要

摘要:
近年来，随着我国高炉炼铁技术的不断进步，对入炉矿品位的要求也不断提高。目前高铁低硅烧结技术的研究已经成为烧结技术发展的一大进步。应用高铁低硅烧结可进一步提高入炉品位，达到提铁、降硅、节焦及降低生铁成本的目的。此技术也对改善高炉冶炼条件和相应的技术经济指标具有非常重要的意义，并且响应国家号召，实现炼铁工艺的节能降耗。然而随着烧结矿中铁品位的提高，SiO₂含量的降低，特别是当SiO₂含量低于5%时，烧结过程中液相量的减少，粘结相的不足等问题势必会影响烧结矿的强度和产、质量。所以解决这些问题，成为高铁低硅烧结技术能够持续创新发展的不竭动力。本文主要是对高铁低硅烧结技术在国内外的发展现状所做的一个归纳总结，以及根据生产实际出现的问题提出相应的解决措施，同时对该技术未来发展趋于智能化所做出的一些设想。
- 高铁低硅 /
- 烧结矿 /
- 节能降耗 /
- 智能化
Abstract:
In recent years, with the continuous progress of China's blast furnace ironmaking technology, the requirements for the grade of ore into the furnace have also increased. At present, the research on high-speed and low-silicon sintering technology has become a great progress in the development of sintering technology. The application of high-speed and low-silicon sintering can further improve the quality of the furnace, and achieve the purposes of iron lifting, silicon reduction, coke reduction and pig iron cost reduction. This technology is also of great significance for improving blast furnace smelting conditions and corresponding technical and economic indicators, and the corresponding state has called for the energy saving and consumption reduction of the ironmaking process. However, with the increase of iron grade in sintered ore, the content of SiO₂ decreases, especially when the content of SiO₂ is less than 5%, the liquid phase volume decreases during the sintering process, and the problems of insufficient bonding phase are bound to affect the strength and sintered ore, production and quality. Therefore, solving these problems has become an inexhaustible motive force for the continuous innovation and development of high-speed low-silicon sintering technology. This article is mainly a summary of the current development status of high-speed low-silicon sintering technology at home and abroad, as well as corresponding solutions based on actual production problems. At the same time, some ideas for the future development of the technology are becoming intelligent.
- High iron low silicon /
- Sinter /
- Energy saving /
- Intelligent

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表 1 科维哈厂试生产烧结矿指标

Table 1. The sinter ore index of the trial production of the Keweiha plant

TFe/%	FeO/%	CaO%	SiO₂/%	MgO/%	AI₂O₃/%	碱度/倍
61.2	10.3	6.50	4.62	1.61	0.48	1.41
63.8	12.8	5.04	3.79	1.32	0.38	1.58
64.2	13.4	4.85	2.94	1.12	0.40	1.65
64.8	13.5	4.29	2.63	1.05	0.42	1.63

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表 2 碱度对实验结果的影响

Table 2. Effect of alkalinity on test results

试样号	低温还原粉化/%			矿物组成（面积分数）/%
试样号	RDI_{+ 6.3}	RDI_{+ 3.15}	RDI_-0.5	Fe₂O₃	Fe₃O₄	铁酸钙	硅酸盐	孔洞
R₂-2.1	15.78	50.37	6.94	1.43	53.52	33.84	10.45	0.49
R₂-2.2	8.23	58.56	8.52	3.17	49.85	36.28	10.85	1.20
R₂-2.3	24.61	67.80	5.65	0.78	40.75	46.42	10.18	1.81
R₂-2.4	10.00	49.70	8.71	0.40	50.80	36.89	10.79	0.83

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