Title

DEVELOPMENT AND APPLICATION OF HIGH RADIATIVE COATING TECHNOLOGY IN BF HOT STOVE

DEVELOPMENT AND APPLICATION OF HIGH RADIATIVE COATING TECHNOLOGY IN BF HOT STOVE

Authorship

ZHOU, Huiming; CANG, Daqiang; ZONG, Yanbing; BAI, Hao; DAN, Zhigang

ZHOU, Huiming

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CANG, Daqiang

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ZONG, Yanbing

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BAI, Hao

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DAN, Zhigang

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DOI

10.5151/2594-357x-0113

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Abstract

A new energy saving technology for BF was developed by increasing the radiative rate of the coating on the regenerative checker brick surface inside hot stove. The theoretic analyze and experimental results indicated that higher radiative rate coating will improve the capacity of heat regenerative and heat released to and from the brick by increasing the surface temperature of the brick which strengthening the radiative heat transfer between the flue gas and the brick as well as the conductive heat transfer inside the brick which results in the higher blast temperature and reducing the coke rate of the BF. In addition, the nano/micro coating materials filled the cavity on the surface of the brick which protects the brick and increases its service life. The following parameters of the brick are improved after coating: the volume density of the brick, the crushing strength, tensile strength and the softening temperature with loading. But the pore rate and the distortion rate are decreased after coating which are good for prolonging the service life of the brick.

A new energy saving technology for BF was developed by increasing the radiative rate of the coating on the regenerative checker brick surface inside hot stove. The theoretic analyze and experimental results indicated that higher radiative rate coating will improve the capacity of heat regenerative and heat released to and from the brick by increasing the surface temperature of the brick which strengthening the radiative heat transfer between the flue gas and the brick as well as the conductive heat transfer inside the brick which results in the higher blast temperature and reducing the coke rate of the BF. In addition, the nano/micro coating materials filled the cavity on the surface of the brick which protects the brick and increases its service life. The following parameters of the brick are improved after coating: the volume density of the brick, the crushing strength, tensile strength and the softening temperature with loading. But the pore rate and the distortion rate are decreased after coating which are good for prolonging the service life of the brick.

Keywords

BF hot stove; Regenerative checker brick; High radiative rate coating; High blast temperature; Energy-saving.

BF hot stove; Regenerative checker brick; High radiative rate coating; High blast temperature; Energy-saving.