Influence of calcium ferrite characteristics on metallurgical properties of high basicity sinter

Hao Ruicong; Liu Lei; Han Xiuli; Wang Yifei; Zhang Ce; Wang Lihao

doi:10.7513/j.issn.1004-7638.2021.04.019

Volume 42 Issue 4

Aug. 2021

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Hao Ruicong, Liu Lei, Han Xiuli, Wang Yifei, Zhang Ce, Wang Lihao. Influence of calcium ferrite characteristics on metallurgical properties of high basicity sinter[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(4): 111-116. doi: 10.7513/j.issn.1004-7638.2021.04.019

Citation:

Hao Ruicong, Liu Lei, Han Xiuli, Wang Yifei, Zhang Ce, Wang Lihao. Influence of calcium ferrite characteristics on metallurgical properties of high basicity sinter[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(4): 111-116. doi: 10.7513/j.issn.1004-7638.2021.04.019

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Influence of calcium ferrite characteristics on metallurgical properties of high basicity sinter

doi: 10.7513/j.issn.1004-7638.2021.04.019

College of Mining Engineering，North China University of Science and Technology，Tangshan 063210, Hebei, China

Received Date: 2020-11-28
Publish Date: 2021-08-10

Abstract

Abstract

The content, morphology and grain size of calcium ferrite, and the main binding mineral as well in sinter, play a key role in the quality of sinter. The mineral phase structure and calcium ferrite characteristics of high basicity sinter with different quality situation were studied systematically and quantitatively by using polarized light microscope. The results show that hematite and magnetite are the main metal phases of No.1 and No.2 sinter. The bonding phases are calcium ferrite, dicalcium silicate and vitreous. The difference is that the No.1sinter is mainly composed of interlacing corrosion structure formed by acicular calcium ferrite and magnetite. The No.2 sinter is dominated by granular structure formed by the mutual combination of allochthonous magnetite and binding mineral. The volume percentage of calcium ferrite in No.1 sinter is about 50%, and its shape is mostly needle shaped. The size range of diameter is 0.05~0.10mm. The corresponding sinter reducibility (75%), low temperature reduction degradation rate (76.5%) and drum strength (81.6%) show high values. The volume fraction of calcium ferrite in the No.2 sinter is about 45%, and its shape is mostly plate and column. The size range of its diameter is 0.05~0.10mm. The corresponding sinter reducibility (59.35%) is weak, the low temperature reduction degradation rate (25.21%) is low, and the drum strength (63.37%) is small.
- high basicity sinter,
- calcium ferrite,
- morphology,
- reducing,
- low temperature reduction pulverization rate,
- drum strength

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References(15)

References

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