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本文阐述了为长时间连浇选定的耐火材料。大粘土板、大块砖或捣打料配合镁质保护涂层在中间罐内衬的应用改善了劳运条件,减少了操作费用并提高了铜的质量。碱性耐火材料内衬有特殊的优点。在苛刻操作条件下,当用氩气保护时,等静压成型的整体粘土石墨塞棒的寿命延长。多数连铸机的中间罐,都成功地采用了滑动水口。至于浸入式水口,观察到利用椭圆形整体水口的趋势。这种水口的渣线处有保护涂层,其寿命长,消耗低。水口采用非破坏性检验法是有效的。盛钢桶与中间罐之间保护管的应用,减少了钢的二次氧化;使用不同材料制造的有不同形状的浇铸水口,配合惰性气体对钢液的保护,在经济上有相当大的优点。现代连铸工艺提供了实现长时间多罐连浇的可能性。在这些条件下,耐火材料的寿命具有决定性的作用。众所周知,在长时间浇铸过程中按需要更换中间罐,是繁重的操作。鉴于此,选定了能长时间抵抗钢液作用的耐火材料。炼钢工作者对钢纯度及改善其表面质量提出的要求,迫使耐火材料工作者寻找提高耐火材料寿命的新途径。藉助多次的模拟及工业试验,曾试图消除钢的二次氧化,改善钢液向中间罐及结晶器的输送条件。本文阐述了耐火材料生产中主要研究的近况。
This article describes the selection of refractories for continuous casting. The application of large clay plates, large bricks or ramming materials in combination with magnesian protective coatings in the middle tank liner improves working conditions, reduces operating costs and improves copper quality. Alkaline refractories have special advantages. Under harsh operating conditions, the life of an isostatically-molded monolithic graphite graphite stopper is prolonged when protected with argon. Most of the continuous casting machine in the tank, have successfully adopted the sliding gate. As for submerged nozzles, the tendency to utilize oval integral nozzles was observed. This outlet of the slag line protection coating, its long life, low consumption. The use of non-destructive test nozzle is valid. The application of a protective tube between the ladle and the intermediate tank reduces the secondary oxidation of the steel; the use of different shapes of molded nozzles made of different materials, combined with the protection of molten steel by the inert gas, has considerable economic advantages . The modern continuous casting process offers the possibility of continuous pouring of multiple tanks. Under these conditions, refractory life has a decisive role. As we all know, in the long casting process as needed to replace the middle jar, it is a heavy operation. In view of this, selected refractory material that can resist molten steel for a long time. The demands placed on steel purity and surface quality by steelmakers have forced refractories to look for new ways to increase the life of refractory materials. With many simulations and industrial tests, attempts have been made to eliminate the secondary oxidation of steel and improve the delivery conditions of the molten steel to the intermediate tank and the crystallizer. This article describes the current status of major research in the production of refractory materials.