Tundish nozzle steel retaining groove, tundish nozzle and preparation method

Abstract

The invention provides a tundish nozzle steel blocking groove, a tundish nozzle and a preparation method. The tundish nozzle steel blocking groove comprises a steel blocking groove body and a blocking steel plate. The steel blocking groove body is of an inverted groove-shaped structure with the cross section being an arc, the two ends of the steel blocking groove body are closed, and the bottom edge of the steel blocking groove body is suitable for being connected with a tundish bottom working lining. A flow guide hole is formed in the arc side wall of the steel blocking groove body, and the steel blocking groove body is made of a refractory material. The blocking steel plate is arranged in the flow guide hole. The tundish nozzle steel blocking groove is provided with the flow guide hole, the blocking steel plate is arranged in the flow guide hole, molten steel can be temporarily prevented from entering the nozzle, and cold steel is prevented from being formed in the nozzle; large inclusions can be prevented from entering and blocking a water gap; a molten steel flow field around the nozzle is changed to prevent vortex around the nozzle; and short-distance molten steel flow is avoided, and inclusions in the molten steel can be conveniently adsorbed by a covering agent.

Description

technical field [0001] The invention belongs to the technical field of steelmaking equipment, and in particular relates to a tundish nozzle retaining steel groove, a tundish nozzle and a preparation method. Background technique [0002] The tundish is an intermediate device connecting the ladle and the crystallizer in the steelmaking production process, and has the functions of diversion, continuous pouring, decompression, protection and refining. [0003] The tundish first receives the molten steel poured from the ladle, and then distributes it to each crystallizer from the tundish nozzle at the bottom. At present, the tundish still has the following problems during the steel pouring process of the continuous casting machine: 1. Ladle steel The water flows into the tundish through the long nozzle and then flows into each tundish nozzle after being diverted. Often, the tundish has a low online baking temperature or a low temperature of the molten steel in the ladle, causing ...

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Problems solved by technology

[0003] The tundish first receives the molten steel poured from the ladle, and then distributes it to each crystallizer from the tundish nozzle at the bottom. At present, the tundish still has the following problems during the steel pouring process of the continuous casting machine: 1. Ladle steel The water flows into the tundish through the long nozzle and then flows into each tundish nozzle after being diverted. Often, the tundish has a low online baking temperature or a low temperature of the molten steel in the ladle, causing the molten steel to freeze at the tundish nozzle, resulting in failure of pouring ;2. Due to the large-sized inclusions in the tundish collecting at the nozzle of the tundish, the nozzle of the tundish is blocked; 3. The molten steel forms a vortex at the nozzle of the tundish, which accelerates the erosion of the nozzle by the molten steel, causing the tundish to be off the assembly line in advance; 4. For multi-flow tundishes, the distance from molten steel to each nozzle is different. For the short-distance molten steel flow, its flow path should be extended as much as possible so that the inclusions in molten steel have enough time to float to the surface of molten steel and thus Adsorbed by covering agent

The patent with the publication number CN203371034U discloses a slag-retaining device for the nozzle of the tundish. During the process, the residual steel slag on the tundish cover was heated and fell off into the water inlet. At the same time, the problem of slag rolling in the nozzle was avoided at the initial stage of pouring, but the above problems still could not be solved.

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