Non-oxide enhanced material for slag line of submersed nozzle

Abstract

The invention relates to a submersed nozzle for steel making and continuous casting tundish, in particular to a non-oxide enhanced material for a slag line of a submersed nozzle. The material comprises the components in percentage by mass as follows: 5.5%-8% of ZrB2, 75%-78% of m-ZrO2, 6%-8% of graphite, 2%-3% of Al, 5%-6.5% of O'-Sialon, 1.0%-2.0% of Y2O3-PSZ and the balance of impurities; and 8-10% of a modified resin binding agent is additionally added. The non-oxide enhanced material for the slag line of the submersed nozzle has excellent corrosion resistance and plugging resistance, can effectively reduce carbureting of molten steel, and is more suitable for producing low -carbon steel and ultra-low carbon steel.

Description

technical field

[0001] The invention relates to a submerged nozzle for steelmaking and continuous casting tundish. Background technique

[0002] As a key functional refractory material for continuous casting, the submerged nozzle is the last functional refractory product for continuous casting connecting the tundish and mold. During continuous casting production, the service life of the submerged nozzle is mainly restricted by factors such as thermal shock resistance, mechanical strength, high temperature molten steel erosion resistance, slag erosion resistance and anti-clogging performance to ensure smooth passage of molten steel.

[0003] The submerged nozzle for continuous casting is prone to produce A1 2 o 3 The attachment seriously affects and limits the efficiency and quality of continuous casting production. The blockage of the submerged nozzle will force the casting speed to decrease, lack of flow and even stop casting, which will not only affect the productio...

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