The use of sleeve brick in converter tapping hole has many obvious advantages, which not only improves production efficiency, but also significantly reduces production cost and accident risk. The following is a specific advantage analysis:

I. Extending service life

Sleeve bricks (especially aluminum-carbon sleeve bricks) have excellent erosion resistance and erosion resistance, and can work stably in high temperature environment for a long time. Its service life can usually reach more than 150 heats, which is at least twice as long as the traditional steel pipe sleeve process.

By optimizing the material and production process, the service life of some sleeve bricks can even reach more than 200 heats.

II. Improving production efficiency

Reduce the replacement frequency: due to the extension of service life, the replacement frequency of sleeve bricks is greatly reduced, which reduces the downtime caused by replacing the tapping hole. For example, after the application of integral sleeve brick, only increasing steelmaking time has created remarkable economic benefits.

Stable tapping process: Sleeve brick can effectively reduce the deformation and loose flow of tapping hole, ensure the stability of tapping process, thus improving the alloy yield, lowering tapping temperature and reducing the amount of slag.

III. Reducing production costs

Material cost: Although the initial investment of sleeve brick may be high, the single use cost is greatly reduced due to its long service life. For example, the cost of a sleeve brick is more than 700 yuan lower than that of a sleeve steel pipe in the same life.

Maintenance cost: the use of sleeve bricks reduces the maintenance frequency and workload of tapping hole and reduces the maintenance cost.

IV. Improving security

Reduce the risk of breakout: the overall structural design of sleeve brick reduces the gap and reduces the risk of breakout. Compared with the split sleeve brick, the integral sleeve brick is safer to use because there is no gap.

Stable tap hole structure: the high strength and good thermal shock resistance of sleeve brick make it stable under complex working conditions, reducing production accidents caused by damage to tap hole.

V. Improving the production environment

Reduce the secondary oxidation of molten steel: the stability of sleeve brick effectively reduces the phenomenon of loose flow during tapping, reduces the secondary oxidation of molten steel and improves the quality of molten steel.

Optimization of operating conditions: After using sleeve brick, the temperature and flow rate of tap hole are more stable, and the tapping environment of operators is significantly improved.

VI. Optimize materials and technology

High-performance material: modern sleeve bricks are mostly made of aluminum-carbon material, which has high fire resistance, good corrosion resistance and thermal shock resistance. By optimizing the material and production process, the performance of sleeve brick is continuously improved, which can better adapt to the working conditions of high temperature and high oxidation.

Improved production process: the sleeve brick formed by isostatic pressing has uniform structure and uniform internal stress distribution, which has better overall performance than the sleeve brick formed by mechanical pressing.

VII. Summary

The use of sleeve brick in converter tapping hole has obvious advantages, including prolonging service life, improving production efficiency, reducing production cost, improving safety and improving production environment. These advantages not only improve the production efficiency and economic benefits of converter steelmaking, but also provide strong support for the sustainable development of iron and steel enterprises.