High strength composite material for blast furnace cooling walls, preparation method of high strength composite material, and application of high strength composite material in protection of cooling walls

A high-strength composite material and composite material technology, applied in the field of high-strength composite materials for blast furnace staves, can solve problems such as thermal stress damage, inability to protect the stave, poor slag-hanging performance, etc., to improve adhesion, increase compactness, Excellent thermal conductivity effect

Inactive Publication Date: 2019-03-22
HENAN HUAXI FURNACE REFRACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem addressed by the present invention is: in the prior art, staves are prone to thermal stress damage during smelting, there are masonry gaps in the inlaid brick masonry, and the erosive damage to the stave cannot be avoided, and the slag-hanging performance is not good, so it cannot Better protection for staves

Method used

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  • High strength composite material for blast furnace cooling walls, preparation method of high strength composite material, and application of high strength composite material in protection of cooling walls

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A high-strength composite material for blast furnace staves, the composite material is prepared from component A and component B, the mass percentage of the component A is 55%, and the mass percentage of the component B is 45%;

[0041] The component A is a carbon composite fiber material;

[0042] The component B is prepared from the following raw materials in parts by weight: 30% of aluminum nitride micropowder, 8% of high-purity silicon carbide, 11% of mullite, 21% of alumina powder, 9% of silicon micropowder, montmorillonite 10%, sericite 5%, aluminate cement 4% and naphthalenesulfonate superplasticizer 2%.

[0043] The product was tested for performance, and the results are shown in Table 1.

[0044] Among them, the specific properties of raw materials are as follows:

[0045] The tensile strength of the carbon composite fiber material is 3200Mpa, and the tensile modulus of elasticity is 33000-40000Mpa; it has small specific gravity, high temperature resistance (...

Embodiment 2

[0058] A high-strength composite material for blast furnace staves, the composite material is prepared from component A and component B, the mass percentage of the component A is 65%, and the mass percentage of the component B is 35%;

[0059] The component A is a carbon composite fiber material;

[0060] The component B is prepared from the following raw materials in parts by weight: 40% of aluminum nitride micropowder, 6% of high-purity silicon carbide, 9% of mullite, 20% of alumina powder, 9% of silicon micropowder, montmorillonite 10%, sericite 2.5%, aluminate cement 3% and naphthalenesulfonate superplasticizer 0.5%.

[0061] Described raw material specific performance is identical with embodiment 1.

[0062] The product was tested for performance, and the results are shown in Table 1.

Embodiment 3

[0064] A high-strength composite material for blast furnace staves, the composite material is prepared from component A and component B, the mass percentage of the component A is 60%, and the mass percentage of the component B is 40%;

[0065] The component A is a carbon composite fiber material;

[0066] The component B is prepared from the following raw materials in parts by weight: 35% of aluminum nitride micropowder, 7% of high-purity silicon carbide, 10% of mullite, 23% of alumina powder, 9% of silicon micropowder, montmorillonite 10.5%, Sericite 2.5%, Silicone Gel Particles 2%, and Naphthalene Sulfonate Superplasticizer 1%.

[0067] Described raw material specific performance is identical with embodiment 1. The particle diameter of the silica gel particles is 5-10 mm.

[0068] The product was tested for performance, and the results are shown in Table 1.

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Abstract

The invention discloses a high strength composite material for blast furnace cooling walls, a preparation method of the high strength composite material, and application of the high strength compositematerial in protection of the cooling wall. The high strength composite material for the blast furnace cooling walls is prepared from a composite fiber material, aluminum nitride micro-powder, high-purity silicon carbide, mullite, alumina powder, silica powder, montmorillonite, sericite, a binding agent and a water reducing agent composite material. Practice proves that the composite material hasgood thermal conductivity, and can transfer heat to the cooling wall in time, so that the hot surface temperature is significantly reduced, and a stable slag crust is formed and does not easily falloff, that is, the slag crust can be well formed on the hot surface of the cooling wall; the high strength composite material can prevent the slag crust from falling off, so that the permanent and stable slag crust is realized, and the service life of the cooling wall is greatly prolonged. The high strength composite material is good in construction workability, is molded by pumping and self-flow forming and is free from vibration, so that a dense high-strength whole can be formed in an embedding groove of the cooling wall. The high strength composite material has a good application prospect inthe protection of the blast furnace cooling walls.

Description

technical field [0001] The invention belongs to the technical field of refractory materials. Specifically, it relates to a high-strength composite material for a cooling wall of a blast furnace. Background technique [0002] There are many components in the ironmaking blast furnace, among which the cooling stave, as one of the many components, plays an important role in the stability of the furnace type and the extension of the service life of the blast furnace. The main function of the stave in the blast furnace is to ensure the stability of the furnace type and the integrity of the furnace condition, eliminate thermal stress and keep the furnace lining away from the high temperature zone in the furnace, so as to prolong the life of the blast furnace. According to the structure of the body, the stave is divided into smooth stave and brick stave. Among them, brick-inlaid staves are mainly used above the tuyere belt, with complex working conditions, complex design structure...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/581C04B35/63C04B35/634C04B35/66
CPCC04B35/581C04B35/6316C04B35/634C04B35/66C04B2235/3217C04B2235/3418C04B2235/3463C04B2235/3472C04B2235/349C04B2235/3826C04B2235/77C04B2235/96C04B2235/9607C04B2235/9676
Inventor 姜玉毅
Owner HENAN HUAXI FURNACE REFRACTORY
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