Processing method of continuous casting tundish for reducing residual molten steel

Abstract

The invention discloses a handling method for reducing the excess liquid steel in continuous casting bakie, it belongs to black metallurgy continuous casting technology. The to solve technical problem is: the steel slag entraps liquid steel with the orifice vortex flow and entraps into crystallizer in the continuous casting bakie casting process, so the steel slag amount of tunic is big, excess liquid steel is more, so the metal yield rate is influenced. The adopted solving technical project is: reducing the liquid temperature around casting nozzle through changing the nature of liquid steel slag in bakie and increasing the basic capacity and viscosity, reducing slag amount, improving end blank section liquid steel consolidation, reducing excess liquid steel 20% and increasing metal yield rate 0.57%. The handling method is easy to operate and reduces large fireproof material consumption, avoids so-called wobbling-steel accidents, it is easy to operate, safe and reliable.

Description

technical field [0001] The invention relates to a production process of a continuous casting machine, in particular to the treatment of residual molten steel poured in a continuous casting tundish, which belongs to the black metallurgy technology. Background technique [0002] In the continuous casting machine production process, molten steel is injected into the crystallizer through the tundish. At the end of casting, the liquid level of molten steel in the tundish gradually decreases. At the end of casting, the amount of molten steel is so small that the molten steel forms a vortex state, causing the scum on the molten steel to be involved in crystallization. The slag in the tundish, the slab inclusions in the continuous casting product increase, resulting in quality accidents such as internal defects in the continuous casting slab. The inclusions are large, and in serious cases affect the solidification of the upper surface of the slab, and even the solidified shell is ver...

AI Technical Summary

Problems solved by technology

[0003] The problem to be solved by the present invention is that, in the prior art continuous casting tundish casting process, the steel slag is involved in the molten steel and mixed into the crystallizer along with the injection flow, resulting in a large amount of slag in the tundish, and the remaining molten steel is increasing. The remaining poured steel will eventually become waste steel. After the tundish is disintegrated, it will be divided into recyclable smelted blocks by manual oxygen cutting method, and then re-entered into steelmaking. This is a great waste, which not only wastes manpower, but also increases physical labor intensity. , and waste of energy and material resources, lower metal yield