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Dry material for fire resistance

A dry-type material and refractory technology, applied in the field of refractory materials, can solve the problems of poor corrosion resistance, shedding and high cost of dry-type materials, improve seismic performance and thermal stability, enhance high temperature and corrosion resistance, and improve Density effect

Inactive Publication Date: 2020-05-08
张家港市恒乐阳方高温材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the baking and use of the tundish, once the carbonaceous material used as the binding phase falls off due to oxidation and other reasons, because the magnesia fine powder in the matrix material is difficult to sinter effectively at the operating temperature, the bonding strength between particles in the decarburized layer Low, easy to fall off under the scouring action of the molten pool, affecting the service life of the dry material
Although the combination of inorganic salts and oxide powders can avoid the problem of low bonding strength of the decarburized layer caused by carbon oxidation, these two combinations not only have the problem of high cost, but also cause dry-type Corrosion resistance of the material deteriorates

Method used

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  • Dry material for fire resistance

Examples

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preparation example Construction

[0054] In a specific embodiment, the preparation method of the phenolic resin comprises the following steps:

[0055] Weigh phenol, methyl p-hydroxyphenylpropionate, boric acid, hydrochloric acid and toluene, heat the system to 180-200°C, remove water, cool down to 90°C, add paraformaldehyde, heat to 100-120°C, and react After 30 minutes to 1 hour, remove water to obtain phenolic resin.

[0056] In a preferred embodiment, the preparation method of the phenolic resin comprises the steps of:

[0057] Weigh the formulated amount of phenol, methyl p-hydroxyphenylpropionate, boric acid, hydrochloric acid and toluene, heat to 90°C to stabilize the reaction system, then gradually increase the temperature to 190°C within 5 hours until no liquid appears in the water separator , The water generated by the reaction was distilled off under reduced pressure, the temperature was lowered to 90°C, paraformaldehyde was added, heated to 110°C, reacted for 45min, and water was removed to obtain...

Embodiment 1

[0068] The first aspect of Example 1 provides a dry material for refractory, which comprises the following components in parts by weight:

[0069] 77 parts of magnesia; 18 parts of magnesia olive sand; 4 parts of high temperature binder A; 1.1 parts of high temperature binder B and 1 part of auxiliary agent;

[0070] The high-temperature binder A is a phenolic resin;

[0071] The high-temperature binder B is a silicon-titanium compound.

[0072] The second aspect of embodiment 1 provides a kind of preparation method of phenolic resin, comprises the steps:

[0073] Weigh the formulated amount of phenol, methyl p-hydroxyphenylpropionate, boric acid, hydrochloric acid and toluene, heat to 90°C to stabilize the reaction system, then gradually increase the temperature to 190°C within 5 hours until no liquid appears in the water separator , the water generated by the reaction was distilled off under reduced pressure, the temperature was lowered to 90°C, paraformaldehyde was added,...

Embodiment 2

[0078] The first aspect of Example 2 provides a dry material for refractory, which comprises the following components in parts by weight:

[0079] 60 parts of magnesia; 5 parts of magnesia olive sand; 3 parts of high temperature binder A; 0.2 parts of high temperature binder B and 0.5 parts of additives;

[0080] The high-temperature binder A is a phenolic resin;

[0081] The high-temperature binder B is a silicon-titanium compound.

[0082] The second aspect of embodiment 2 provides a kind of preparation method of phenolic resin, comprises the steps:

[0083] Weigh the formulated amount of phenol, methyl p-hydroxyphenylpropionate, boric acid, hydrochloric acid and toluene, heat to 90°C to stabilize the reaction system, then gradually increase the temperature to 190°C within 5 hours until no liquid appears in the water separator , the water generated by the reaction was distilled off under reduced pressure, the temperature was lowered to 90°C, paraformaldehyde was added, hea...

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Abstract

The invention provides a dry material for fire resistance. The dry material comprises the following components in parts by weight: 60-95 parts of magnesite, 5-33 parts of forsterite sand, 3-5 parts ofa high-temperature binding agent A, 0.2-2 parts of a high-temperature binding agent B and 0.5-1.5 parts of an auxiliary agent. The dry material for fire resistance provided by the invention can significantly enhance strength and is capable of enhancing high-temperature resistance, corrosion resistance, density, anti-seismic property and thermal stability.

Description

technical field [0001] The invention relates to the technical field of refractory materials, in particular to a dry refractory material. Background technique [0002] The tundish is a refractory container used in short-process steelmaking. It first receives the molten steel poured from the ladle, and then distributes it to each crystallizer through the tundish nozzle. As an important basic raw material, steel plays a pivotal role in the economic development of countries all over the world. [0003] Inclusions in steel mainly exist in non-metallic compound state, among which oxides are the main ones. Generally, inclusions with a particle size greater than 50 μm are called large inclusions, which account for 1% of the total inclusions in steel, but are the most harmful to steel quality. In order to improve the purity of molten steel, higher requirements are put forward for the analysis of inclusions. It is necessary to use a suitable analysis method for separating and detect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/043C04B35/634C04B35/632
CPCC04B35/043C04B35/632C04B35/63476C04B2235/3272C04B2235/3445C04B2235/9607
Inventor 吴一方刘朝阳
Owner 张家港市恒乐阳方高温材料有限公司
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