Tundish quick-replaceable sewage outlet used for metal continuous casting plate blank

Abstract

The invention relates to a tundish quick-replaceable sewage outlet used for the metal continuous casting plate blank. The main technical characteristic of the sewage outlet is that a sewage outlet body, an inner slag line and an outer slag line are separately made from refractory materials with different components and proportions and the sewage outlet is prepared from the following raw materials in parts by weight: a. body materials: 18-25 parts of graphite, 10-15 parts of bauxite 24#, 10-15 parts of bauxite 36#, 20-25 parts of bauxite 150#, 10-20 parts of quartz, 3-5 parts of metallic silicon, 2-4 parts of silicon carbide and 1-3 parts of boron glass powder; b. inner slag line materials: 18-33 parts of graphite, 55-70 parts of white alundum, 2-4 parts of metallic silicon powder, 2-4 parts of silicon carbide powder and 3-5 parts of aluminum oxide powder; and c. outer slag line materials: 6-20 parts of graphite, 75-90 parts of electric-melting stable zirconia, 1-3 parts of metallic silicon and 1-3 parts of silicon carbide. The tundish quick-replaceable sewage outlet of the invention can be used to solve the problem that the sewage outlet product of the prior art has short service life, lower mechanical strength and high production cost.

Description

technical field [0001] The invention relates to a rapid replacement nozzle for a tundish for metal continuous casting slabs, which belongs to metal casting molten material conveying parts, and particularly relates to a casting nozzle for a nozzle installed between a tundish and a crystallizer in a metal continuous casting slab device . Background technique [0002] The tundish rapid replacement nozzle for metal continuous casting slab is a disposable refractory component for continuous casting, and it is one of the most critical functional components in the continuous casting process. It is installed between the tundish and the crystallizer. It is the channel for the molten steel to be transported from the tundish to the mold. Its function is to protect the molten steel from oxidation, prevent nitrogen from dissolving or mold slag from mixing into the molten steel, and prevent molten steel from splashing, ensuring that the molten steel is in There is a reasonable flow field...

AI Technical Summary

Problems solved by technology

In the prior art, the conventional method of rapid replacement of the nozzle in the metal continuous casting slab tundish is that the body material and the slag strand material are one material, and the composition and components of the refractory material used are not reasonable, resulting in high temperature resistance, The thermal shock resistance is not good enough, the corrosion resistance and thermal shock strength are not high enough, and the anti-stripping performance is not good, resulting in short service life, low mechanical strength and high production cost of the sewer products

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