沙钢5800 m<sup>3</sup>高炉所用烧结矿FeO含量研究

邹志雄; 杜屏

doi:10.3969/j.issn.1000-6532.2024.03.025

沙钢5800 m³高炉所用烧结矿FeO含量研究

邹志雄,
杜屏

江苏省（沙钢）钢铁研究院，江苏　苏州　215625

详细信息

作者简介: 邹志雄（1993-），男，硕士研究生，主要从事选-冶联合工艺技术研究

中图分类号: TD981

收稿日期: 2022-08-15

刊出日期: 2024-06-25

Research on FeO Content of Sinter Used in Shagang's 5800 m³ Blast Furnace

Research Institute of Iron and Steel of Jiangsu Province (Shasteel), Suzhou 215625, Jiangsu, China

Received Date: 15 August 2022

Publish Date: 25 June 2024

摘要

摘要:
这是一篇冶金工程领域的文章。为给烧结矿FeO成分控制、质量优化提供理论依据，考查了沙钢5800 m³高炉所用烧结矿转鼓强度、低温还原粉化、中温还原性等冶金性能，并通过统计数据分析探究了FeO含量对烧结矿冶金性能的影响以及影响FeO含量的因素，结果表明：基于沙钢现行原料质量、配矿结构以及工艺操作条件下：FeO含量增加可提升烧结矿转鼓指数、RDI_+3.15及RI，当RI大于85%时，FeO含量才成为制约RI因素，FeO含量适宜值为9.5%左右；R、SiO₂含量、精粉及燃料配比增加会导致FeO含量升高，提升MgO含量，负压会造成FeO含量下降；数据分析表明：控制R为1.9，SiO₂、MgO含量分别为5.2%、1.8%左右，精粉配比在11%以内，燃料配比在4.5%～5%之间，负压为16 KPa以内，可使烧结矿FeO含量均值维持在9.5%左右，对应转鼓指数均值为80%左右，RDI_+3.15、RI均值分别为75%、80%以上。
- 冶金工程 /
- FeO含量 /
- 烧结矿 /
- 强度 /
- 冶金性能 /
- 影响因素
Abstract:
This is an article in the field of metallurgical engineering. To provide a theoretical basis for FeO composition control and quality optimization of sinter, the metallurgical properties of sinter ore used in 5800 m³ blast furnace of Shagang, such as drum strength, low-temperature reduction pulverization, medium-temperature reducibility were investigated. The effect of FeO content on the performance of sinter and the factors affecting FeO content were explored through statistical data analysis. The results show that based on Shagang's current raw material quality, ore blending structure and process operating conditions, the increase of FeO content can improve the drum index and RDI_+3.15 of sinter. When RI is more than 85%, the FeO content becomes the limiting factor of RI, and the appropriate value of FeO content is about 9.5%. The increase of R, SiO₂ content, fine powder and fuel ratio will cause the increase of FeO content, MgO content and negative pressure will cause the decrease of FeO content. Data analysis shows if R is 1.9, the contents of SiO₂ and MgO are about 5.2% and 1.8%, respectively. The ratio of fine powder is less than 11%, the ratio of fuel is between 4.5 and 5%, and the negative pressure is below 16 KPa, the average FeO content of sinter is about 9.5%, the corresponding drum index is about 80%. The average values of RDI_+3.15 and RI are above 75% and 80%, respectively.
- Metallurgical engineering /
- FeO content /
- Sinter /
- Strength /
- Metallurgical properties /
- Influencing factors

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图 1 FeO含量对RDI_+3.15影响

Figure 1.

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图 2 FeO含量对RI影响

Figure 2.

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图 3 FeO含量对转鼓指数影响

Figure 3.

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图 4 碱度R对FeO含量影响

Figure 4.

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图 5 SiO₂含量对FeO含量影响

Figure 5.

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图 6 MgO含量对FeO含量影响

Figure 6.

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图 7 精粉配比对FeO含量影响

Figure 7.

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图 8 燃料配比对FeO含量影响

Figure 8.

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图 9 负压对FeO含量影响

Figure 9.

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表 1 烧结混匀矿配料结构/%

Table 1. Distribution ratio of each group of sintering raw materials

巴西粉			澳洲粉				精粉				杂料
卡粉	BRBF	S FHT	扬迪	纽曼	PB	哈扬	澳精	英美精	智利精	英美资源	氧化铁皮	返矿
7～25	7～25	0～5	20～36	6～29	6～33	10～14	5～11	7～8	0～8	7～8	0～5	5～10

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表 2 配矿结构及工艺参数

Table 2. Ore blending structure and process parameters

卡粉/%	BRBF/%	杨迪/%	纽曼/%	PB/%	精粉/%	燃料/%	负压/ kPa
15	16	32	13	16	8	4.8	14

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表 3 烧结矿化学成分及冶金性能/%

Table 3. Sinter chemical composition and metallurgical properties

CaO	SiO₂	MgO	Al₂O₃	FeO	P₂O₅	TiO₂	T_Fe	RDI_+3.15	RI	T
10.16	5.22	1.82	1.78	9.47	0.06	0.11	56.87	78.32	79.9	80.33

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