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众所周知,在连铸过程中的基本要求是提供高洁净的钢水,从而避免由夹杂物造成的表面和内部缺陷。这些夹杂物主要来自保护渣的卷吸和外来氧化铝的浸入等,它们都与结晶器内钢水流动,特别是弯月面下的流动密切相关。然而在连铸过程从浇注开始到浇注终了,浇注条件经历各种各样的变化,为了避免保护渣的卷吸,需要使结晶器内流动控制在最佳的范围内,从而在提高铸坯质量的同时,保持浇注的稳定性。
It is well known that the basic requirement in the continuous casting process is to provide a highly clean molten steel to avoid surface and internal defects caused by inclusions. These inclusions mainly come from the entrainment of mold flux and the impregnation of alien alumina, all of which are closely related to the flow of molten steel in the mold, especially the meniscus. However, in the continuous casting process from the beginning to the end of pouring, pouring conditions go through a variety of changes, in order to avoid the entrainment of mold flux, it is necessary to control the flow in the mold within the optimum range, so as to improve the quality of the slab While maintaining the stability of the pouring.