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High thermal state breaking strength high alumina prefabticated member containing simple substance silicon

A technology of elemental silicon and prefabricated parts is applied in the field of refractory materials, which can solve the problems of low thermal strength, low product added value, and high brittleness, and achieve the effects of improving normal temperature performance, improving volume stability, and improving normal temperature strength.

Inactive Publication Date: 2012-06-20
HENAN GENGSHENG REFRACTORIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The comprehensive performance of ordinary high-alumina prefabricated parts is not high enough, for example: low hot strength, high brittleness, difficult to meet the use requirements, limited application range, and low product added value

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1: A high thermal strength and high aluminum preform containing elemental silicon

[0026] The high thermal strength and high aluminum preform containing elemental silicon of the present invention is prepared by the following method:

[0027] a. Raw material composition: expressed in weight percentage, the raw material of the high thermal strength and high alumina preform containing elemental silicon contains 87% of high alumina bauxite, 3% of elemental silicon, and 10% of binder;

[0028] Al in the high alumina bauxite 2 o 3 The content ≥ 75%; the high bauxite 87% is composed of 20% high bauxite with particle size of 8 ~ 5mm, 12% high bauxite with 5 ~ 3mm, 16% high bauxite with 3 ~ 1mm, 1 ~ Composition of 0.1mm high bauxite 18%, 180 mesh high bauxite 12% and 320 mesh high bauxite 9%;

[0029] The Si content in the elemental silicon is ≥98%, and the elemental silicon is elemental silicon with a particle size of 150 mesh;

[0030] Calcium aluminate cement is ...

Embodiment 2

[0035] Embodiment 2: basically the same as Embodiment 1, the difference is:

[0036] Step a: The raw material of the high thermal strength and high alumina preform containing elemental silicon contains 81% of high alumina bauxite, 9% of elemental silicon, and 10% of binder;

[0037] Al in the high alumina bauxite 2 o 3 The content ≥ 75%; the high bauxite 81% is composed of 18% high bauxite with particle size of 8 ~ 5mm, 17% high bauxite with 5 ~ 3mm, 13% high bauxite with 3 ~ 1mm, 13% high bauxite with particle size of 1 ~ 5mm Composition of 0.1mm high bauxite 20%, 180 mesh high bauxite 8% and 320 mesh high bauxite 5%;

[0038] The Si content in the elemental silicon is ≥98%, and the elemental silicon is elemental silicon with a particle size of 200 mesh;

[0039] Calcium aluminate cement is 5% in the binding agent, and alumina hydrate is 5%;

[0040] Step b: In addition, adding inorganic dispersant sodium tripolyphosphate, the amount of dispersant added is 0.4% of the tot...

Embodiment 3

[0044] Embodiment 3: basically the same as Embodiment 1, the difference is:

[0045] Step a: The raw material of the high thermal strength and high alumina preform containing elemental silicon contains 89% of high alumina bauxite, 4% of elemental silicon, and 7% of binder;

[0046] Al in the high alumina bauxite 2 o3 89% of the high bauxite is composed of 25% high bauxite with a particle size of 8 to 5mm, 20% high bauxite with a particle size of 5 to 3mm, 20% high bauxite with a particle size of 3 to 1mm, and 20% with a particle size of 1 to 5 mm. Composition of 0.1mm high bauxite 15%, 180 mesh high bauxite 5% and 320 mesh high bauxite 4%;

[0047] The Si content in the elemental silicon is ≥98%, and the elemental silicon is a mixture of 150 mesh elemental silicon and 200 mesh elemental silicon, and the mixing ratio of the two is 1:1;

[0048] Calcium aluminate cement is 3% in described bonding agent, and silica fume is 4%;

[0049] Step b: adding an organic dispersant, sod...

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Abstract

The invention discloses a high thermal state breaking strength high alumina prefabticated member containing simple substance silicon. A preparation method of the prefabticated member is that the prefabticated member considers bauxite chamotte, the simple substance silicon and a binding agent as base materials, firstly a dispersing agent is added in the three base materials to be evenly stirred and mixed in a dry mode, then water is added to be evenly mixed the evenly-mixed materials to inject in a mould for vibration moulding, maintenance are carried out after moulded, the prefabticated member is roasted in a roasting kiln, the roasted prefabticated member is then roasted at high temperature and cooled to reach the room temperature after sintered to obtain the high thermal state breaking strength high alumina prefabticated member containing the simple substance silicon. The high thermal state breaking strength high alumina prefabticated member solves the problem that a common high alumina prefabticated member is poor in high-temperature behavior and high-temperature volume stability and the like and improves normal temperature strength, and the product of the high thermal state breaking strength high alumina prefabticated member has better high-temperature behavior, thermal shock stability and volume stability than the common high alumina prefabticated member.

Description

Technical field [0001] The present invention involves a refractory material, especially a high -thermal intensity high -aluminum prefabricated piece with a single silicon -containing silicon. Background technique [0002] At present, refractory materials are mainly based on oxide materials and carbon composite materials.The refractory material mainly oxides is usually greater crispy, and it is difficult to meet the requirements of high intensity and good thermal shock stability at the same time.Carbon composite refractory material is a carbon component such as graphite in oxide refractory materials, thereby achieving the purpose of improving the brittleness of oxide refractory materials.However, the disadvantages of such materials have poor antioxidant, high thermal conductivity, and limited use scope.On this basis, metal AL, Si, or Si is introduced in the oxide system 3 N 4 The practice of non -oxide phases such as SIALON has become a new research hotspot in the field of refract...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/10C04B35/622
Inventor 李纪伟毕振勇徐德亭彭倩张光普原志友
Owner HENAN GENGSHENG REFRACTORIES
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