Effect of Special Components in Blast Furnace Slag of Baotou Iron and Steel Company on Self-pulverization Behavior of Steel Slags

CHEN Yinsheng; LUO Guoping; HAO Shuai; REN Jie; AN Shengli; CHAI Yifan

doi:10.3969/j.issn.1000-6532.2024.04.025

2024 No. 4

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Article navigation > Multipurpose Utilization of Mineral Resources > 2024 > 45(4): 168-174

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CHEN Yinsheng, LUO Guoping, HAO Shuai, REN Jie, AN Shengli, CHAI Yifan. Effect of Special Components in Blast Furnace Slag of Baotou Iron and Steel Company on Self-pulverization Behavior of Steel Slags[J]. Multipurpose Utilization of Mineral Resources, 2024, 45(4): 168-174. doi: 10.3969/j.issn.1000-6532.2024.04.025

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CHEN Yinsheng, LUO Guoping, HAO Shuai, REN Jie, AN Shengli, CHAI Yifan. Effect of Special Components in Blast Furnace Slag of Baotou Iron and Steel Company on Self-pulverization Behavior of Steel Slags[J]. Multipurpose Utilization of Mineral Resources, 2024, 45(4): 168-174. doi: 10.3969/j.issn.1000-6532.2024.04.025

Effect of Special Components in Blast Furnace Slag of Baotou Iron and Steel Company on Self-pulverization Behavior of Steel Slags

Inner Mongolia University of Science and Technology, College of Material and Metallurgy, Baotou 014010, Inner Mongolia, China

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Corresponding author: LUO Guoping, luoguoping3@126.com

Received Date: 25 November 2021

Publish Date: 25 August 2024

Abstract

Abstract

This is an article in the field of metallurgical engineering, which proposed a new idea of mixing molten blast furnace slag with steel slag to achieve self-pulverization of steel slag, and systematically studied the influence mechanism of special components of CaF₂ and CeO₂ in blast furnace slag of Baotou Iron and Steel Company on the self-pulverization of steel slags. Using analytically pure CaO, SiO₂, CaF₂ and CeO₂ as starting materials, pure C₂S specimens were prepared with n ( CaO ) : n ( SiO₂ ) = 2 : 1, then different mass fractions of CaF₂ and CeO₂ were added, respectively. The effect of CaF₂ and CeO₂ on the self-pulverization behavior of C₂S was investigated by calcining the specimen at 1 450 °C for 1 h and cooling with the furnace. The results showed when CaF₂ was incorporated into C₂S and the content of CaF₂ was less than 2.5%, it had little effect on the self-pulverization of C₂S. However, when the content of CaF₂ was more than 2.5%, the specimen had different degrees of agglomeration, which affected the self-pulverization of C₂S. Considering that excessive CaF₂ would affect the environment, the content of CaF₂ should be controlled below 2.5%. When CeO₂ incorporated into C₂S and the content was 0.25%, C₂S could still be completely self-pulverized, but when the CeO₂ content was more than 0.5%, C₂S no longer self-pulverized.Therefore, the CeO₂ content must be less than 0.25 %, and the self-pulverization effect of C₂S was relatively good.
- Metallurgical engineering /
- Steelmaking slag /
- Blast furnace slag /
- Special components /
- Dicalcium silicate /
- Self-pulverization

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References

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