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2022
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05
The performance of anti-seepage aerated bricks
Source： Innovation Materials
Release time：2022-05-16 17:36
炉外精炼工艺如今是炼钢流程的重要组成部分，钢包底吹氩工序是又实现炉外精炼不可少的，而钢包透气砖则是实现这一工艺的关键元件。目前的透气砖主要有狭缝、防渗型两种，透气砖的性能关乎着钢铁的质量和产量，一般来说，透气砖在寿命、底吹效果、吹扫力度和安全度上都应当契合炼钢厂家生产的日常周转。 （图）防渗透气砖在使用寿命、底吹效果和安全可靠性上，防渗透气砖与狭缝型透气砖相比，防渗透气砖有着透气性能稳定的优势，可
Extra-furnace refining technology is now an important part of the steelmaking process. Argon bottom blowing in the ladle is essential for achieving extra-furnace refining, and the ladle aeration brick is the key component for achieving this process. Current aeration bricks are mainly of two types: slit type and anti-seepage type. The performance of aeration bricks is related to the quality and output of steel. Generally speaking, the aeration bricks should meet the daily turnover of steelmaking plants in terms of lifespan, bottom blowing effect, blowing intensity, and safety.
(Figure) Anti-seepage aeration brick
Compared with slit-type aeration bricks, anti-seepage aeration bricks have the advantage of stable air permeability in terms of service life, bottom-blowing effect, and safety and reliability. They can effectively prevent steel from seeping into the working surface of the aeration bricks; after steel casting, the required air permeability can be achieved without cleaning or intermittent cleaning, which significantly reduces the labor intensity of workers and also reduces some energy consumption; the service life is significantly improved, and the safety factor of the aeration brick is also improved.
For slit aeration bricks, the number of slits and the form of single or double slits depend on the size of the ladle, the smelting environment, and the required air permeability, so the production process of this type of aeration brick is more complex; anti-seepage aeration bricks control the particle size of the raw materials to produce a large number of pores throughout the dispersed block, forming a uniform microporous structure, so the production process is simpler. The bottom of the anti-seepage brick has a slit-type design, equivalent to a small slit-type aeration brick. During use, when a slit gas passage is observed on the working surface of the aeration brick during hot repair, it indicates that the residual length of the aeration brick is insufficient, and the ladle needs to be taken offline.
(Figure) Anti-seepage aeration brick
Among domestic aeration brick manufacturers, the performance of anti-seepage aeration bricks is lower than that of slit aeration bricks. However, after scientific research and design, Kechuang New Materials has achieved significant improvements in the service life and bottom-blowing effect of dispersed aeration bricks.
Source: Luoyang Kechuang New Materials Co., Ltd.: https://www.kcnh.com/
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