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Preparation method of lamellar corundum-spinel refractory material

A refractory material and spinel technology, applied in the field of refractory materials, can solve the problems of easy erosion, high carbon content, easy oxidation, etc., and achieve the effect of broad application prospects and good thermal shock resistance

Active Publication Date: 2019-03-19
SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a preparation method of layered corundum-spinel refractory material, so that it can solve the problems of high carbon content, easy oxidation and easy erosion of existing carbon-containing refractory materials

Method used

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  • Preparation method of lamellar corundum-spinel refractory material
  • Preparation method of lamellar corundum-spinel refractory material

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Embodiment 1

[0022] The preparation method of the layered corundum-spinel refractory material of the present embodiment comprises the following steps:

[0023] 1) Take 1-3mm plate corundum 15wt%, 0-1mm plate corundum 25wt%, 45μm plate corundum 30wt% and 2μmAl 2 o 3 30wt% fine powder, high-speed kneading for 15 minutes to obtain a mixture; take 80wt% of the mixture, add 10wt% composite additive, add 10wt% SiAlCN precursor, add 6wt% Ni(NO 3 ) 2 .6H 2 O, After high-speed kneading, cold-press forming to obtain an alumina body with a thickness of 10mm.

[0024] 2) Tape casting is used to prepare thin spinel blanks with a thickness of 2 mm, and the raw material is fused spinel with a thickness of 2 μm; hot-press lamination is used to alternately laminate spinel thin blanks and alumina blanks to prepare multi-layer corundum - spinel body, in N 2 In the atmosphere furnace, the temperature is raised to 1450-1600 at a rate of 2~5°C / min o C, keep warm for 60-120min. Then turn off the power an...

Embodiment 2

[0027] The layered corundum-spinel refractory material of the present embodiment comprises the following steps:

[0028] 1) Take 1-3mm plate corundum 15wt%, 0-1mm plate corundum 25wt%, 45μm plate corundum 30wt% and 2μmAl 2 o 3 Fine powder 30wt%, kneading at high speed for 15 minutes to obtain a mixture. Take 80wt% of the mixture, add 10wt% composite additive, add 10wt% SiAlCN precursor, add 6wt% Ni (NO 3 ) 2 .6H 2 O, After high-speed kneading, cold-press forming to obtain an alumina body with a thickness of 10mm.

[0029] 2) Tape casting is used to prepare thin spinel blanks with a thickness of 5mm, and the raw material is fused spinel of 2 μm; hot-pressed lamination is used to alternately laminate spinel thin blanks and alumina blanks to prepare multi-layer corundum - spinel body, in N 2 In the atmosphere furnace, the temperature is raised to 1450-1600 at a rate of 2~5°C / min o C, keep warm for 60-120min. Then turn off the power and cool down to room temperature natur...

Embodiment 3

[0032] The layered corundum-spinel refractory material of the present embodiment comprises the following steps:

[0033] 1) Take 1-3mm plate corundum 15wt%, 0-1mm plate corundum 25wt%, 45μm plate corundum 30wt% and 2μmAl 2 o 3 30wt% fine powder, high-speed kneading for 15 minutes to obtain a mixture; take 90wt% of the mixture, add 5wt% composite additives, add 5wt% SiAlCN precursor, add 6wt% Ni(NO 3 ) 2 .6H 2 O, After high-speed kneading, cold-press forming to obtain an alumina body with a thickness of 10mm.

[0034] 2) Tape casting is used to prepare thin spinel blanks with a thickness of 5mm, and the raw material is fused spinel with a thickness of 2 μm; hot-press lamination is used to alternately laminate spinel thin blanks and alumina blanks to prepare multi-layer corundum - spinel body, in N 2 In the atmosphere furnace, the temperature is raised to 1450-1600 at a rate of 2~5°C / min o C, keep warm for 60-120min. Then turn off the power and cool down to room temperat...

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Abstract

The invention belongs to the technical field of refractory materials, and provides a preparation method of a lamellar corundum-spinel refractory material. The preparation method of the lamellar corundum-spinel refractory material comprises the following steps: selecting liquid-state ceramic precursor poly-nitrogen silane as a framework material, and aluminum tri-sec-butoxide as a doped Al source,increasing the quantity of carbon-carbon double bond by divinyl methylbenzene, and preparing a SiAlCN ceramic precursor by taking cyclohexane as a solvent; mixing the SiAlCN ceramic precursor, a compound binding agent and Ni(NO3)2.6H2O and Al2O3 powder to obtain a mixed material, and performing cold press molding on the mixed material to obtain an aluminum oxide green body; preparing a thin spinelstock by adopting tape casting; then alternately laminating the thin spinel stock and the aluminum oxide blank by adopting hot pressing lamination, so as to prepare a multilayer corundum-spinel greenbody; and alternately laminating the thin spinel stock and the aluminum oxide blank, so as to prepare the multilayer synergetically enhanced ultra-low carbon corundum-spinel refractory material. Therefractory material has good thermal shock resistance.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a method for preparing a layered corundum-spinel refractory material. Background technique [0002] In traditional carbon-containing refractory materials, although the presence of carbon components improves the thermal shock resistance of refractory materials, under the action of high-temperature smelting, the carbon oxidizes to form a porous structure in the refractory material, which reduces the strength of the material and leads to It is easy to be eroded and infiltrated by slag, which also affects the content of carbon in steel. The longevity of refractory materials has always been a problem faced by the high-temperature industry, especially the long life of refractory materials that meet advanced steel smelting is a huge challenge. Thermal shock resistance, corrosion resistance, pollution-free and well-matched new refractory materials with structura...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/80C04B35/103C04B35/443
CPCC04B35/803C04B35/103C04B35/443C04B2235/422
Inventor 刘国齐李红霞杨文刚陈勇强于建宾钱凡马天飞
Owner SINOSTEEL LUOYANG INST OF REFRACTORIES RES