A dry vibration material binder and a method for preparing the same

Abstract

The application relates to the technical field of refractory materials, and discloses a dry vibration material binder and a preparation method thereof. The binder comprises the following components by weight: 40-50 parts of silica sol, 3-8 parts of a compatilizer, 10-15 parts of phenolic resin, and 0.2-0.4 parts of a surfactant. The compatilizer comprises an amino compound. The technical scheme solves the problem of low compressive strength and low bending strength of the dry vibration material in the related art.

Description

Technical Field

[0001] This invention relates to the field of refractory materials technology, specifically to a dry vibratory binder and its preparation method. Background Technology

[0002] With the continuous development of high-temperature industries such as metallurgy, chemical industry, and building materials, the performance requirements for refractory materials are becoming increasingly stringent. Dry vibratory mixes are loose refractory materials composed of refractory aggregates, powders, binders, and admixtures. During use, vibration compacts the material, resulting in excellent workability and performance.

[0003] The binder plays a crucial role in this process, binding the refractory aggregates and powders together to form a cohesive material with a certain strength and stability. Therefore, there is a need for a binder that can further improve the compressive and flexural strength of dry vibratory refractory materials. Summary of the Invention

[0004] This invention proposes a dry vibratory material binder and its preparation method, which solves the problem of low compressive strength and flexural strength of dry vibratory materials in related technologies.

[0005] The technical solution of the present invention is as follows: This invention proposes a dry vibratory material binder, the binder comprising the following raw materials in parts by weight: 40-50 parts silica sol, 3-8 parts compatibilizer, 10-15 parts phenolic resin, and 0.2-0.4 parts surfactant, wherein the compatibilizer comprises an amino compound.

[0006] As a further technical solution, the SiO2 content in the silica sol is 40wt%.

[0007] As a further technical solution, the free phenol content in the phenolic resin is <12wt%, and the solid content is >75wt%.

[0008] As a further technical solution, the amino compound includes one or more of 3-bis(2-hydroxyethyl)amino-2-hydroxypropanesulfonic acid and 7-amino-4-hydroxy-2-naphthalenesulfonic acid.

[0009] As a further technical solution, the amino compound is composed of 3-bis(2-hydroxyethyl)amino-2-hydroxypropanesulfonic acid and 7-amino-4-hydroxy-2-naphthalenesulfonic acid.

[0010] When the amino compound in this invention is composed of 3-bis(2-hydroxyethyl)amino-2-hydroxypropanesulfonic acid and 7-amino-4-hydroxy-2-naphthalenesulfonic acid, the resulting binder can better improve the flexural strength and compressive strength of dry vibratory materials.

[0011] As a further technical solution, the mass ratio of 3-bis(2-hydroxyethyl)amino-2-hydroxypropanesulfonic acid and 7-amino-4-hydroxy-2-naphthalenesulfonic acid is 1:1.

[0012] As a further technical solution, the raw materials of the binder also include polyacrylamide.

[0013] As a further technical solution, the molecular weight of the polyacrylamide is 14 million to 20 million.

[0014] As a further technical solution, the molecular weight of the polyacrylamide is 18 million.

[0015] As a further technical solution, the mass ratio of 3-bis(2-hydroxyethyl)amino-2-hydroxypropanesulfonic acid, 7-amino-4-hydroxy-2-naphthalenesulfonic acid and polyacrylamide is 1:1:1.

[0016] As a further technical solution, the mass ratio of the compatibilizer to the silica sol is 3~8:40.

[0017] As a further technical solution, the mass ratio of the compatibilizer to the silica sol is 4~7:40.

[0018] As a further technical solution, the mass ratio of the compatibilizer to the silica sol is 1:8.

[0019] As a further technical solution, the surfactant is a nonionic surfactant.

[0020] As a further technical solution, the nonionic surfactant includes one or two of polyethylene glycol, alkylphenol polyoxyethylene ether, and block polyether.

[0021] The present invention also proposes a method for preparing a dry vibratory binder, comprising the following steps: mixing the raw materials evenly to obtain a dry vibratory binder.

[0022] The working principle and beneficial effects of this invention are as follows: In this invention, the binder used for dry vibratory feedstock is an organic-inorganic binder. Through the synergistic effect of the organic and inorganic binders, it can have good flowability during processing, resulting in high strength, better thermal shock resistance, and extended service life, meeting the needs of industrial production. The inorganic binder is silica sol, and the organic binder is phenolic resin. The mixture of phenolic resin and silica sol can improve the strength of the binder. However, when phenolic resin and silica sol are used in combination, there is a problem of poor stability, which affects the bonding strength between phenolic resin and silica sol, leading to a decrease in the flexural and compressive strength of the dry vibratory feedstock. The addition of a compatibilizer can improve the stability of the combination of phenolic resin and silica sol, further improving the flexural and compressive strength of the dry vibratory feedstock. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0024] In the following embodiments and comparative examples: Silica sol: SiO2 content 40wt%; Phenolic resin 213: Free phenol content <12wt%, solid content >75wt%, Zhengzhou Hengtong Chemical Co., Ltd.

[0025] Example 1 A method for preparing a dry vibratory binder includes the following steps: After mixing 40 parts of silica sol, 3 parts of compatibilizer, 10 parts of phenolic resin 213 and 0.2 parts of polyethylene glycol 600 evenly, a dry vibratory binder is obtained; wherein the compatibilizer is 3-bis(2-hydroxyethyl)amino-2-hydroxypropanesulfonic acid.

[0026] Example 2 A method for preparing a dry vibratory binder includes the following steps: After mixing 45 parts of silica sol, 4 parts of compatibilizer, 12 parts of phenolic resin 213 and 0.3 parts of polyethylene glycol 600 evenly, a dry vibratory binder is obtained: the compatibilizer is 3-bis(2-hydroxyethyl)amino-2-hydroxypropanesulfonic acid.

[0027] Example 3 A method for preparing a dry vibratory binder includes the following steps: After mixing 50 parts of silica sol, 5 parts of compatibilizer, 15 parts of phenolic resin 213 and 0.4 parts of polyethylene glycol 600 evenly, a dry vibratory binder is obtained; wherein the compatibilizer is 3-bis(2-hydroxyethyl)amino-2-hydroxypropanesulfonic acid.

[0028] Example 4 The only difference between this embodiment and Example 1 is that the compatibilizer is 7-amino-4-hydroxy-2-naphthalenesulfonic acid.

[0029] Example 5 The only difference between this embodiment and Example 1 is that the compatibilizer is 3-bis(2-hydroxyethyl)amino-2-hydroxypropanesulfonic acid and 7-amino-4-hydroxy-2-naphthalenesulfonic acid in a mass ratio of 1:1.

[0030] Example 6 The only difference between this embodiment and Example 1 is that the compatibilizer is 3-bis(2-hydroxyethyl)amino-2-hydroxypropanesulfonic acid, 7-amino-4-hydroxy-2-naphthalenesulfonic acid and polyacrylamide (molecular weight of 14 million) in a mass ratio of 1:1:1.

[0031] Example 7 The only difference between this embodiment and Embodiment 6 is that the amount of compatibilizer added is 8 parts.

[0032] Example 8 The only difference between this embodiment and Embodiment 6 is that the amount of compatibilizer added is 4 parts.

[0033] Example 9 The only difference between this embodiment and Embodiment 6 is that the amount of compatibilizer added is 5 parts.

[0034] Example 10 The only difference between this embodiment and Embodiment 6 is that the amount of compatibilizer added is 7 parts.

[0035] Example 11 The only difference between this embodiment and Embodiment 9 is that the molecular weight of the polyacrylamide is 18 million.

[0036] Example 12 The only difference between this embodiment and Embodiment 9 is that the molecular weight of the polyacrylamide is 20 million.

[0037] Comparative Example 1 The only difference between this comparative example and Example 1 is that 3-bis(2-hydroxyethyl)amino-2-hydroxypropanesulfonic acid is not added.

[0038] Test case The properties of the binders prepared in Examples 1-12 and Comparative Example 1 were determined using the following specific methods: Dry vibratory material raw materials were prepared according to the mass ratio of magnesia-chrome sand (particle size 0~5mm), fused magnesia sand (particle size 0~5mm), binder and borax (particle size 0~2mm) in 6:1:5:2. After the raw materials were mixed evenly, they were vibrated and molded, baked at 200℃, and demolded to obtain dry vibratory material. The flexural strength of the dry vibratory material was determined according to GB / T 3002-2017 "Test Method for High Temperature Flexural Strength of Refractory Materials", and the compressive strength of the dry vibratory material was determined according to GB / T 34218-2017 "Test Method for High Temperature Compressive Strength of Refractory Materials". The test results are shown in Table 1.

[0039] Table 1. Performance test results of the binders in Examples 1-12 and Comparative Example 1

[0040] Compared with Example 1, Comparative Example 1 did not add 3-bis(2-hydroxyethyl)amino-2-hydroxypropanesulfonic acid. As a result, the flexural strength and compressive strength of Example 1 were higher than those of Comparative Example 1, indicating that the addition of amino compounds in this invention can improve the flexural strength and compressive strength of dry vibratory materials.

[0041] Compared with Example 1, the compatibilizer in Example 4 was 7-amino-4-hydroxy-2-naphthalenesulfonic acid, and the compatibilizer in Example 5 was 3-bis(2-hydroxyethyl)amino-2-hydroxypropanesulfonic acid and 7-amino-4-hydroxy-2-naphthalenesulfonic acid. As a result, the flexural strength and compressive strength of Example 5 were higher than those of Examples 1 and 4, indicating that the simultaneous addition of 3-bis(2-hydroxyethyl)amino-2-hydroxypropanesulfonic acid and 7-amino-4-hydroxy-2-naphthalenesulfonic acid can further improve the flexural strength and compressive strength of dry vibratory feed.

[0042] Compared with Example 5, the compatibilizer in Example 6 also includes polyacrylamide. As a result, the flexural strength and compressive strength of Example 6 are higher than those of Example 5, indicating that when the compatibilizer is 3-bis(2-hydroxyethyl)amino-2-hydroxypropanesulfonic acid, 7-amino-4-hydroxy-2-naphthalenesulfonic acid and polyacrylamide, the flexural strength and compressive strength of dry vibratory material can be further improved.

[0043] Compared with Example 6, Examples 7-10 changed the amount of compatibilizer added. As a result, the flexural strength and compressive strength of Examples 8-10 were higher than those of Examples 6-7, indicating that when the mass ratio of compatibilizer to silica sol is 4-7:40, the flexural strength and compressive strength of dry vibratory material can be improved better.

[0044] Compared with Example 9, Examples 11 and 12 changed the molecular weight of polyacrylamide. As a result, the flexural strength and compressive strength of Example 11 were higher than those of Examples 9 and 12, indicating that when the molecular weight of polyacrylamide is 1800, the flexural strength and compressive strength of dry vibratory material can be further improved.

[0045] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A dry vibratable material binder characterized by, The binder comprises the following raw materials in parts by weight: 40-50 parts silica sol, 3-8 parts compatibilizer, 10-15 parts phenolic resin, and 0.2-0.4 parts surfactant, wherein the compatibilizer comprises an amino compound; The amino compound is composed of 3-bis(2-hydroxyethyl)amino-2-hydroxypropanesulfonic acid and 7-amino-4-hydroxy-2-naphthalenesulfonic acid in a mass ratio of 1:

1. The mass ratio of the compatibilizer to the silica sol is 4~7:

40.

2. A dry vibratory material bond as claimed in claim 1, wherein The binder also includes polyacrylamide in its raw materials.

3. A dry vibratory mix binder as defined in claim 2, wherein, The polyacrylamide has a molecular weight of 14 million to 20 million.

4. A dry vibratory material bond as defined in claim 1, wherein The mass ratio of the compatibilizer to the silica sol is 3~8:

40.

5. The dry vibratory binder according to claim 1, characterized in that, The surfactant is a nonionic surfactant.

6. The dry vibratory binder according to claim 5, characterized in that, The nonionic surfactant includes one or two of polyethylene glycol, alkylphenol polyoxyethylene ether, and block polyether.

7. A method for preparing a dry vibratory binder according to any one of claims 1 to 6, characterized in that, Includes the following steps: After the raw materials are mixed evenly, a dry vibratory binder is obtained.

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