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1 前言近年来在炼钢连铸过程中影响钢材质量及生产能力的最大问题是水口堵塞。为防止水口堵塞和降低钢水中的夹杂物,各钢铁厂一般多采用从中间包/滑动水口吹入Ar、N2等气体的方法。最近,一直在研究开发使用吹入的气体量由大量减为少量仍能保持背压的材质与构造的耐火材料,但是,在多连铸和长时间铸造时会出现气体泄漏,很难稳定背压。
1 Introduction In recent years in the steelmaking and continuous casting process affecting the quality of steel and production capacity of the biggest problem is the nozzle blockage. In order to prevent nozzle clogging and reduce inclusions in the molten steel, the steel mills generally use the method of blowing Ar, N2 and other gases from the tundish / sliding nozzle. Recently, refractories of materials and constructions that use a small amount of gas to be blown down to maintain a backpressure have been studied and developed. However, gas leaks occur during multiple continuous casting and long casting, making it difficult to stabilize the back Pressure