保护渣渣圈形成长大机理及影响因素研究现状

结晶器保护渣是一种重要的功能材料,对保证连铸过程顺行及提高铸坯质量起着重要作用,但在连铸过程中,保护渣容易在结晶器内壁上黏结,形成渣圈。过大的渣圈会削弱保护渣的控制传热和润滑作用,容易使铸坯表面缺陷增多,甚至造成漏钢事故。从宏观和微观两方面综述了国内外对渣圈形成长大机理的研究成果,并对渣圈在结晶器壁上的黏结情况进行了分析,总结了影响渣圈形成长大的因素,同时指出了现有研究中的不足,为以后的工作提供了参考。

Research status on mechanism of formation and growth of slag rim and affecting factors

Mold flux is an important functional material, which plays an important role in ensuring the smooth running of continuous casting process and improving the quality of the slab. However, during continuous casting, mold flux is easy to adhere to the inner wall of the mold to form a slag rim. The oversized slag rim will weaken the function of controlling heat transfer and lubrication of the slag, which will easily increase the surface defects of the slab and even cause breakouts.The research results of the formation and growth mechanism of the slag rim at home and abroad are reviewed from the macroscopic and microscopic aspects, and the adhesion condition of the slag rim on the mold wall is analyzed, and the factors affecting the formation and growth of the slag rim are summarized. Meanwhile,it points out the deficiency of the existing research and provides reference for the future work.