Sandwich type long nozzle sealing piece and manufacturing method thereof

A sandwich-type, long nozzle technology, which is applied to casting equipment, manufacturing tools, metal processing equipment, etc., can solve the problems of poor corrosion resistance of nozzle gaskets, achieve excellent corrosion resistance, easy disassembly, and improve corrosion resistance.

Inactive Publication Date: 2015-03-25
WUHAN UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The defect of this method is that the prepared nozzle gasket has poor corrosion resistance

Method used

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  • Sandwich type long nozzle sealing piece and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A sandwich type shroud seal and a preparation method thereof. The preparation method described in this embodiment is:

[0022] Using 15~25wt% sintered mullite and 75~85wt% platy corundum as raw materials, plus 10~20wt% water glass and 15~20wt% composite binder of the raw materials, mix evenly, cast and form, after pouring The green body 1 is in the shape of a bell mouth and is naturally dried; then graphite paper 2 is pasted on the inner and outer surfaces of the dried green body 1 to obtain a sandwich-type shroud seal.

[0023] The composite binder described in this embodiment is a mixed solution of resin and alcohol, and the mass ratio of resin to alcohol is 1:(2~1); the resin is phenolic resin.

Embodiment 2

[0025] A sandwich type shroud seal and a preparation method thereof. The preparation method described in this embodiment is:

[0026] 25~35wt% fused mullite and 65~75wt% white corundum are used as raw materials, plus 20~30wt% water glass and 20~25wt% composite binder of the raw materials, mixed evenly, poured and molded, after pouring The green body 1 is in the shape of a bell mouth and is naturally dried; then graphite paper 2 is pasted on the inner and outer surfaces of the dried green body 1 to obtain a sandwich-type shroud seal.

[0027] The composite binder described in this embodiment is a mixed solution of resin and alcohol, and the mass ratio of resin to alcohol is 1:(3~2); the resin is epoxy resin.

Embodiment 3

[0029] A sandwich type shroud seal and a preparation method thereof. The preparation method described in this embodiment is:

[0030] Use 35-455wt% sintered mullite and 55-65wt% brown corundum as raw materials, add 30-40wt% water glass and 25-30wt% composite binder, mix evenly, cast and form, and cast The green body 1 is in the shape of a bell mouth and is naturally dried; then graphite paper 2 is pasted on the inner and outer surfaces of the dried green body 1 to obtain a sandwich-type shroud seal.

[0031] The composite binder described in this embodiment is a mixed solution of resin and alcohol, and the mass ratio of resin to alcohol is 1:(3~4); the resin is furan resin.

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Abstract

The invention relates to a sandwich type long nozzle sealing piece and a manufacturing method of the sandwich type long nozzle sealing piece. According to the technical scheme, raw materials including 15-55wt% of mullite, 45-85wt% of corundum, 10-50wt% of water glass and 15-35wt% of complex binding agents are evenly mixed and molded by casting, and a rough body (1) formed after casting is shaped like a horn mouth and is naturally dried; then graphite paper (2) is pasted on the inner surface and the outer surface of the dried rough body (1) to form the sandwich type long nozzle sealing piece. The complex binding agent is a mixed solution of resin and ethyl alcohol, and the mass ratio between the resin and the ethyl alcohol is 1/ (4-1). The resin is phenolic resin or epoxy resin or furan resin or polyester resin. The thickness of the graphite paper is 0.2-1.5 mm. The manufactured sandwich type long nozzle sealing piece has the advantages of being good in sealing performance, high in strength, good in high-temperature volume stability, good in erosion resistance and easy to detach.

Description

technical field [0001] The invention belongs to the technical field of shroud seals. In particular, it relates to a sandwich type shroud seal and a preparation method thereof. Background technique [0002] In the continuous casting process, the whole protection pouring is adopted from the ladle to the tundish to the crystallizer. The whole protection pouring is an effective measure to prevent the secondary oxidation of molten steel, control the increase of nitrogen and oxygen in molten steel, and improve the quality of steel. The main measures to protect pouring in the whole process of continuous casting include the use of molten steel covering agent for ladle and tundish, long nozzle for injection flow from ladle to tundish, submerged nozzle and gas protection pouring for tundish, and mold slag for mold, etc. Among them, the protective pouring of the ladle shroud is to use the shroud to mesh with the lower nozzle of the ladle sliding nozzle, and seal the joint with argon g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D41/54
CPCB22D41/54
Inventor 李享成陈刘芳朱伯铨陈波
Owner WUHAN UNIV OF SCI & TECH
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