Flexible continuously cast water gap and manufacturing method thereof

Abstract

The invention provides a flexible continuously cast water gap and a manufacturing method thereof, and belongs to the technical field of metallurgy. The water gap comprises an inner layer, an outer layer and an intermediate layer, wherein the inner layer is made of a fireproof material; the outer layer is made of a fireproof material; and the intermediate layer is arranged between the inner layer and the outer layer and is made of a fiber-shaped material or a fireproof material mixed with the fiber-shaped material. Since the fiber material intermediate layer is formed in the water gap, the water gap has certain flexibility, can resist mechanical outer force of impact, vibration and the like, prevents crack formation and brittle failure, and can lower the baking temperature and time to certain extent, thereby prolonging the using times and the service life; additionally, the manufacturing method is simple, and a water gap of a specific shape can be manufactured.

Description

technical field [0001] The invention relates to a nozzle, in particular to a flexible continuous casting nozzle and a manufacturing method thereof, belonging to the technical field of metallurgy. Background technique [0002] The nozzle is mainly made of magnesia, high alumina, zirconia and other refractory materials, which are sintered at high temperature. In the continuous casting process, whether it is a submerged nozzle, ladle long nozzle or other forms of nozzle, it will be scoured by molten steel, mechanical vibration of related facilities and thermal stress caused by temperature difference between inner and outer surfaces. These external factors are prone to cracks and even brittle fractures for refractory materials that are not flexible, brittle, and have poor seismic performance, which seriously affect the safe production of the continuous casting process. [0003] In order to improve the performance of the nozzle, corresponding methods are also mentioned in many p...

AI Technical Summary

Problems solved by technology

These external factors are prone to cracks and even brittle fractures for refractory materials with no flexibility, high brittleness, and poor seismic performance, which seriously affect the safe production of the continuous casting process.

[0003] In order to improve the performance of the nozzle, corresponding methods are also mentioned in many patents: the patent application number 98244314.5 proposes a continuous casting composite nozzle composed of upper and lower structures, and a fixed sleeve combination is arranged at the connection of the structure, which can improve The anti-seismic performance of the nozzle, but the manufacturing process is relatively complicated; the patent application number 200520101697.8 proposes an anti-burst continuous casting tundish upper nozzle, the main method is to have a steel sheet hoop in the upper part of the upper nozzle body; but this method only improves The strength of the local area of ​​the nozzle; and more patents focus on the design of the shape of the nozzle, such as the patent application number 03211455.9, the patent application number 200810026285.0, the patent application number 20100530950.2, etc. Requirements have been made in other aspects, and these improvements have put forward higher requirements for the strength of the nozzle

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