06
2022
-
04
Four main reasons for damage to steel ladle porous bricks
Source： Ke Chuang Xin Cai
Release time：2022-04-06 15:13
During the use of porous bricks in steel plants, the main reasons for the damage of porous bricks are thermal stress, mechanical stress, mechanical wear, and chemical corrosion.
During the use of porous bricks in steel plants, the main reasons for damage to the porous bricks are thermal stress, mechanical stress, mechanical wear, and chemical corrosion.
Porous bricks consist of a porous core and a porous seat brick. When bottom blowing gas is used, the working surface of the porous core will directly contact the high-temperature molten steel. The bottom blowing gas is a cold air stream, forming a very high temperature difference with the high-temperature molten steel. As the number of uses increases, due to the rapid cooling and heating, the corrosion of the porous brick core becomes deeper, easily causing cracks.
The working surface of the bottom porous brick is in direct contact with high-temperature molten steel, while the non-working surface temperature is relatively low. During the repeated use of the steel ladle in steel receiving, steel pouring, and hot repair, the volume of the porous brick and nearby refractory materials changes due to temperature changes. Due to the temperature gradient and the different thermal expansion coefficients between the altered layer and the original layer, the degree of volume change gradually changes from the working surface to the non-working surface of the porous brick, which will produce shear force on the porous brick, causing transverse cracks in the porous brick, and in severe cases, causing transverse fracture of the porous brick.
During steelmaking, the molten steel will strongly scour the bottom of the steel ladle, which will accelerate the erosion of the porous brick. When the upper surface of the porous brick is higher than the bottom of the ladle, it will be subjected to shear and scouring caused by the flow of molten steel. The part above the bottom of the ladle is usually scoured away after one use. In addition, if the valve is closed quickly after refining, the reverse impact of the molten steel will also accelerate the erosion of the porous brick.
The working surface of the porous brick core is in contact with steel slag and molten steel for a long time. The steel slag and molten steel contain iron oxide, ferrous oxide, manganese oxide, magnesium oxide, silicon oxide, etc., while the porous brick contains alumina, silicon oxide, etc., which will react to form low-melting substances (such as FeO·Al2O3, 2(MnO)·SiO2·Al2O3, etc.) and be scoured away.
Kechuang New Materials specializes in the production of porous bricks, burner bricks, electric furnace lids and other refractory materials, with dozens of invention patents and utility model patents. A professional manufacturer worthy of trust! Luoyang Kechuang New Materials Co., Ltd., focusing on the R&D, production and sales of steel ladle porous bricks and other refractory materials for 17 years, is a professional refractory materials manufacturer.
Source: Luoyang Kechuang New Materials Co., Ltd.: https://www.kcnh.com/
key word:
RELATED BLOG
As the crisp autumn breeze brings coolness, fragrant osmanthus fills the air, and the full moon of the Mid-Autumn Festival illuminates the sky, we joyfully welcome the nation’s birthday. In anticipation of the dual holidays of the Mid-Autumn Festival and National Day, and in gratitude for the hard work and steadfast dedication of all employees, as well as to foster a warm and harmonious festive atmosphere, Luoyang Kexin New Materials Co., Ltd. (hereinafter referred to as “Kexin New Materials”) systematically carried out the distribution of holiday benefits on the morning of September 22, extending heartfelt holiday greetings to every employee.
On-site Observations to Gain Insights; Government–Enterprise Symposium to Accelerate IPOs
To leverage the exemplary and leading role of listed companies, stimulate the momentum of pre‑IPO enterprises on the Beijing Stock Exchange, and accelerate their integration into the capital markets, on July 16 the Municipal Government Office organized the “Visiting Listed Companies — Kexin New Materials” event. Yang Jianwen, Deputy Secretary-General of the Municipal Government, Zhang Zhengzheng, Deputy Director of the Municipal Government Office, representatives from the financial departments of several counties and districts, and heads of numerous city‑wide pre‑IPO companies gathered at Luoyang Kexin New Materials Co., Ltd. for exchanges and learning.
To deepen the integration of industry and education, promote the seamless combination of theoretical learning and industrial practice, and broaden university students’ professional horizons and employment insights, on June 26, 2026, a delegation of faculty and students from Wuhan University of Science and Technology visited Luoyang Kexin New Materials Co., Ltd. for a site visit and exchange, gaining an immersive understanding of the company’s production operations and technological innovation across the board.
Whatsapp：15197927236
Fax：+86-379-62117605
Email：yangsp8743@163.com
Add：No. 2 Sanchuan Road, Luoxin Park, Economic and Technological Development Zone, Xin'an County, Luoyang City, Henan Province
©2025 Luoyang Kechuang New Material Co., Ltd This website supports IPv6 Privacy Policy www.300.cn SEO