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An anti-melt-through filler and its preparation method, application and removal method

An anti-melting and powder technology, applied in the field of metallurgical casting, can solve the problems of restricting the industrial production and application of cast steel staves, it is difficult to ensure the melting of cooling water pipes, and the pouring temperature of cast steel staves is high, so as to achieve good resistance to molten metal erosion , Excellent water-soluble collapsibility, high refractoriness

Active Publication Date: 2021-10-08
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The pouring temperature of the cast steel cooling stave is relatively high, and the design wall thickness of some staves is relatively large, resulting in more energy released during the cooling, filling and solidification process of the cast steel cooling stave. It is also difficult to ensure that the cooling water pipe will not be melted through during the pouring process. These problems have not been well resolved for a long time, thus limiting the industrial production and application of cast steel staves
However, when the tonnage of the stave is large, the latent heat released during the solidification process of the molten metal is more, and the filler is easily sintered due to severe heating, which makes the post-cleaning process extremely difficult, and even affects the thermal conductivity of the stave

Method used

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  • An anti-melt-through filler and its preparation method, application and removal method

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Experimental program
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preparation example Construction

[0029] see figure 1 , The first aspect of the present invention provides a method for preparing an anti-meltthrough filler, the method comprising the following steps S1-S3.

[0030] S1, add phenolic resin and sodium polyacrylate to the solvent to prepare a premix.

[0031] The solvent in embodiments of the present disclosure is preferably water. The mass ratio of phenolic resin to sodium polyacrylate is preferably 1: (1-3).

[0032] S2. Prepare solid mixed powder, wherein the solid mixed powder includes zinc oxide, silicon carbide, boron nitride, graphite and calcium hydroxide. In the embodiments of the present disclosure, the content of zinc oxide is preferably 30% to 40%, the content of silicon carbide is preferably 20% to 30%, the content of boron nitride is preferably 5% to 10%, and the content of graphite is preferably 10% to 10%. 20%, the content of calcium hydroxide is preferably 25% to 35%.

[0033] In the embodiments of the present disclosure, the particle size of...

Embodiment 1

[0040] A method for preparing an anti-meltthrough filler, the method comprising the following steps S1-S3.

[0041]S1, adding phenolic resin and sodium polyacrylate with a mass ratio of 1:1 into water to prepare a premix;

[0042] S2, preparing solid mixed powder, wherein the content of zinc oxide in the solid mixed powder is 30%, the content of silicon carbide is 25%, the content of boron nitride is 5%, the content of graphite is 15%, calcium hydroxide The content is 25%;

[0043] S3, mixing the solid mixed powder and the premixed liquid at a mass ratio of 2:1, and using a planetary ball mill to prepare a stably dispersed anti-meltthrough filler.

[0044] The anti-meltthrough filler can be applied to the cooling water pipe in the casting of the cast steel stave with a filling pressure of 0.5 MPa. After the casting of the cast steel stave is completed, when it is necessary to remove the filler in the cooling water pipe, add clear water to the cooling water pipe, the filler w...

Embodiment 2

[0047] A method for preparing an anti-meltthrough filler, the method comprising the following steps S1-S3.

[0048] S1, adding phenolic resin and sodium polyacrylate in a mass ratio of 1:2 to water to prepare a premix;

[0049] S2, preparing solid mixed powder, wherein the content of zinc oxide in the solid mixed powder is 32%, the content of silicon carbide is 20%, the content of boron nitride is 6%, the content of graphite is 10%, calcium hydroxide The content is 32%;

[0050] S3, mixing the solid mixed powder and the premixed liquid at a mass ratio of 2:1, and using a planetary ball mill to prepare a stably dispersed anti-meltthrough filler.

[0051] The anti-meltthrough filler can be applied to the cooling water pipe in the casting of the cast steel stave with a filling pressure of 0.5 MPa. After the casting of the cast steel stave is completed, when it is necessary to remove the filler in the cooling water pipe, add clear water to the cooling water pipe, the filler will...

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Abstract

The invention belongs to the technical field related to metallurgical casting, and discloses a preparation method of an anti-meltthrough filler. The method includes: S1, adding phenolic resin and sodium polyacrylate to a solvent to prepare a premixed solution; S2, preparing a solid mixed powder , wherein the solid mixed powder includes zinc oxide, silicon carbide, boron nitride, graphite and calcium hydroxide; S3, the solid mixed powder is mixed with the premix and ground to obtain the anti-meltthrough filler. On the other hand, the present application also provides an anti-meltthrough filler and its application and removal method. The anti-meltthrough filler disclosed in the present application can realize fast and compact filling under a certain pressure, and at the same time can realize anti-meltthrough at high temperature, and is easy to clean after cooling.

Description

technical field [0001] The invention belongs to the technical field related to metallurgical casting, and more specifically relates to an anti-meltthrough filler and its preparation method, application and removal method. Background technique [0002] As a replacement product of cast iron stave, the cast steel stave is mostly made of low alloy steel, which is similar to the material of the cooling water pipe. During the pouring process, the stave base can form an air gap-free fusion with the cooling water pipe, which greatly improves the stave. Thermal conductivity, and the cast steel cooling stave has the advantages of high elongation, high tensile strength, good thermal shock resistance, etc., and is more suitable for working conditions in high temperature furnaces. In addition, cast steel has good yield strength, and its elongation will increase with the increase of temperature, which can promote the redistribution of high stress and release the stress concentration. At t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66C04B26/12F27D1/12
CPCC04B26/122C04B35/66F27D1/12F27D2009/0013C04B24/26C04B26/06C04B14/30C04B14/324C04B14/327C04B14/024C04B22/064
Inventor 蒋文明陈佳伟龚小龙樊自田李广宇管峰
Owner HUAZHONG UNIV OF SCI & TECH