Study on Corrosion Resistance of S-Carbon Bricks for Blast Furnace Hearth in Molten Iron

Study on Corrosion Resistance of S-Carbon Bricks for Blast Furnace Hearth in Molten Iron

This study simulated the corrosion reaction of S-carbon bricks in a hearth at different carbon contents, flow velocities and temperatures, and their macroscopic and microscopic morphologies were observed by scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDS). The results show...

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Bibliographic Details
Published in:Metals (Basel ) Vol. 13; no. 7; p. 1240
Main Authors: Shi, Huangyu, Wang, Cui, Zong, Yanbing, Liu, Yanxiang, Wang, Zhongyi, Zhang, Jianliang
Format: Journal Article
Language:English
Published: Basel MDPI AG 01-07-2023
Subjects:
blast furnace longevity
Bricks
Carbon
carbon brick corrosion
Carbon content
Convective heat transfer
Corrosion and anti-corrosives
Corrosion resistance
Corrosion tests
Dissolution
Flow velocity
Furnaces
Heat transfer coefficients
Interfaces
Iron
rotating cylinder method
S-carbon brick
Temperature
China
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Summary:This study simulated the corrosion reaction of S-carbon bricks in a hearth at different carbon contents, flow velocities and temperatures, and their macroscopic and microscopic morphologies were observed by scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDS). The results showed that the dissolution of elemental carbon from carbon bricks into molten iron was a rate-controlled reaction. Increasing the temperature to around 1500 °C and decreasing the carbon content to around 4.5% reduced the saturated solubility of carbon in molten iron, and the erosion degree and dissolution rate of the carbon bricks increased correspondingly. For the flow velocity, its increase promoted mechanical flushing and led to an increase in the convective heat transfer coefficient of molten iron, which would increase the hot-side temperature of the hearth sidewall, promoting carbon unsaturation in hot metal and the dissolution reaction.
ISSN:2075-4701
2075-4701
DOI:10.3390/met13071240