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Tantalum-containing refractory material for blast furnace ceramic cup and preparation method of tantalum-containing refractory material

A technology for refractory materials and ceramic cups, applied in the field of refractory materials, can solve the problems of poor refractory performance and insufficient strength of refractory materials, and achieve the effects of improving fracture toughness, prolonging service life and excellent compressive strength.

Pending Publication Date: 2021-12-14
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the existing refractory materials still have the problems of insufficient strength and poor refractory performance.

Method used

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  • Tantalum-containing refractory material for blast furnace ceramic cup and preparation method of tantalum-containing refractory material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The new ceramic cup refractory material of the present invention is represented by weight percentage, and its raw material composition is: brown corundum 75%, silicon carbide 12%, flaky alumina powder 5%, bonded clay 4%, tantalum pentoxide 4% ; Add the above-mentioned 3% of the total weight of the binder. The particle size of tantalum pentoxide is 2.0 μm-4.0 μm. The particle size of flake alumina is 1.0-2.0 μm, and the aspect ratio is 5.0; the binder is composed of sulfonate and lignin, and the mass ratio of sulfonate and lignin is 1:1.

[0024] The preparation steps are:

[0025] (1) Mixing: After co-grinding brown corundum and silicon carbide evenly, add a binder and mix for 6 minutes; then add flake alumina, tantalum pentoxide and bonded clay and mix for 15 minutes to obtain a well-mixed wet material.

[0026] (2), molding: the molding wet material of step (1) gained is pressed into brick adobe under 200 pressure;

[0027] (3), drying: dry the adobe obtained in s...

Embodiment 2

[0030] The new ceramic cup refractory material of the present invention is represented by weight percentage, and its raw material composition is: brown corundum 70%, silicon carbide 15%, flaky alumina powder 8%, bonded clay 4%, tantalum pentoxide 3% ; Add the above-mentioned 3% of the total weight of the binder. The particle size of tantalum pentoxide is 2.0 μm-4.0 μm. The particle size of flake alumina is 2.0-3.0μm, and the aspect ratio is 5.0; the binder is composed of sulfonate and lignin, and the ratio of sulfonate and lignin is 1:1.

[0031] The preparation steps are:

[0032] (1) Mixing: After co-grinding brown corundum and silicon carbide evenly, add a binder and mix for 6 minutes; then add flake alumina, tantalum pentoxide and bonded clay and mix for 15 minutes to obtain a well-mixed wet material.

[0033] (2), molding: the molding wet material of step (1) gained is pressed into brick adobe under 200 pressure;

[0034] (3), drying: dry the adobe obtained in step (2...

Embodiment 3

[0037] The new ceramic cup refractory material of the present invention is represented by weight percentage, and its raw material composition is: brown corundum 65%, silicon carbide 20%, flaky alumina powder 10%, bonded clay 4%, tantalum pentoxide 1% ; Add the above-mentioned 3% of the total weight of the binder. The particle size of tantalum pentoxide is 1.0 μm-2.0 μm. The particle size of flake alumina is 3.0-5.0 μm, and the aspect ratio is 15; the binder is composed of sulfonate and lignin, and the ratio of sulfonate and lignin is 1:1.

[0038] The preparation steps are:

[0039] (1) Mixing: After co-grinding brown corundum and silicon carbide evenly, add a binder and mix for 6 minutes; then add flake alumina, tantalum pentoxide and bonded clay and mix for 15 minutes to obtain a well-mixed wet material.

[0040] (2), molding: the molding wet material of step (1) gained is pressed into brick adobe under 200 pressure;

[0041] (3), drying: dry the adobe obtained in step (...

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Abstract

The invention belongs to the field of refractory materials, and particularly relates to a tantalum-containing refractory material for a blast furnace ceramic cup and a preparation method of the tantalum-containing refractory material. The refractory material comprises the following components in percentage by weight: 65-80% of brown fused alumina, 5-25% of silicon carbide, 2-10% of flaky alumina powder, 1-5% of binding clay and 1-4% of tantalum pentoxide. In addition, a binding agent accounting for 2-4% of the total weight of the raw materials is added. According to the refractory material disclosed by the invention, the superfine tantalum oxide powder is introduced, cubic phase TaCy formed by the material under the conditions of high temperature, high pressure and strong reduction is uniformly dispersed in a product matrix, and a ceramic cup product has more excellent compression strength, refractoriness under load and high-temperature thermal shock resistance due to strong covalent bond property and extremely low self-diffusion coefficient of TaCy. In addition, the fracture toughness of the ceramic cup is improved by adding flaky aluminum oxide. And by utilizing the synergistic effect of tantalum carbide and flake alumina, the service life of the furnace body is expected to be obviously prolonged.

Description

technical field [0001] The invention belongs to the field of refractory materials, and in particular relates to a refractory material for a tantalum-containing type blast furnace ceramic cup and a preparation method thereof. Background technique [0002] The "ceramic cup" is a ceramic refractory masonry with a certain thickness of high load softness, low thermal conductivity, wear resistance and corrosion resistance built on the inner side of the carbon lining of the furnace hearth. During the blast furnace production, due to the heat insulation and heat preservation effect of the ceramic lining, the slag iron directly contacts the ceramic lining, which not only reduces the heat loss through the lining, but also protects the carbon brick, so that the carbon brick can avoid the brittle fracture zone of 800°C to 1100°C . The heat insulation and heat preservation function of the ceramic cup can reduce the heat loss of the hearth, increase the temperature of slag and iron, faci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/10
CPCC04B35/66C04B35/10C04B2235/3826C04B2235/3217C04B2235/349C04B2235/3251C04B2235/5436C04B2235/602C04B2235/606C04B2235/656C04B2235/6567C04B2235/6562C04B2235/77C04B2235/96C04B2235/9607
Inventor 朱媛媛杨建陈智慧
Owner CHANGZHOU UNIV
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