The application of aluminum-carbon sleeve brick in converter tapping hole has obvious application effect, which is mainly reflected in the following aspects:

I. Significantly prolong the service life

Aluminum-carbon sleeve brick has excellent corrosion resistance, erosion resistance and thermal shock resistance, and can run stably in high temperature environment for a long time. The practice shows that the service life of the tap hole can be increased from 200 heats to 370 heats by optimizing the materials and technology of the tap hole seat brick and sleeve brick. In addition, the service life of the integral aluminum-carbon sleeve brick can reach more than 150 heats, which is at least twice as long as that of the traditional process.

II. Improving production efficiency

The use of aluminum-carbon sleeve bricks reduces the frequency of changing the tap hole, thus reducing the downtime caused by changing the tap hole. For example, by improving the tapping process in a steel plant, 23 taps/furnace can be replaced every year, and the time delay can be reduced by 2070 minutes/furnace. In addition, due to the stability of the aluminum-carbon sleeve brick, the tapping process is smoother, the tapping time is shortened, and the production efficiency is further improved.

III. Improving tapping quality

Aluminum-carbon sleeve brick can effectively reduce the scattering phenomenon during tapping, reduce the secondary oxidation of molten steel, improve the alloy yield and stabilize the tapping temperature. This not only improves the quality of molten steel, but also reduces the amount of slag and production cost.

IV. Reducing production costs

Although the initial investment of aluminum-carbon sleeve brick may be high, the single use cost is greatly reduced because of its long service life. For example, the cost of a set of aluminum-carbon sleeve bricks is more than 700 yuan lower than that of a set of steel pipes in the same life. In addition, reducing replacement frequency and downtime has also brought remarkable economic benefits.

V. Improving security

The overall structural design of aluminum-carbon sleeve brick reduces the gap and the risk of steel leakage. Compared with the split sleeve brick, the integral sleeve brick is safer to use because there is no gap.

VI. Optimize process and operation

After adopting the aluminum-carbon sleeve brick, the maintenance and replacement process of the tapping hole has also been optimized. For example, by improving the assembly process and replacement process of the tapping hole, the service life of the tapping hole is significantly improved. In addition, optimizing the size and material of tapping hole can further improve its performance.

VII. Reducing environmental pollution

The use of aluminum-carbon sleeve bricks reduces the phenomenon of molten steel scattering and breakout during tapping, and reduces the risk of environmental pollution caused by accidents.

VIII. Summary

The application of aluminum-carbon sleeve brick in converter tapping hole not only significantly prolongs the service life of tapping hole, but also improves production efficiency, reduces production cost, and improves molten steel quality and production safety. These advantages make it an indispensable refractory in modern converter steelmaking.