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

3 Cites 0 Cited by

AI-Extracted Technical Summary

Problems solved by technology

The comprehensive performance of ordinary high-alumina prefabricated parts is not high enough, for example: low hot str...

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.

Technology Topic

Thermal stateThermal shock +7

Examples

Experimental program(4)

Example Embodiment

[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 4% in described bonding agent, and silica fume is 6%;

[0031] b. According to the raw material composition of the elemental silicon-containing high thermal strength and high aluminum prefabricated part described in step a, various raw materials are weighed, and an inorganic dispersant sodium hexametaphosphate is added in addition, and the amount of the dispersant added is the raw material described in step a. 0.3% of the total weight, and then use a mixer to dry mix various raw materials and dispersants until uniform, to obtain a dry blend material;

[0032] c. In the dry blended material obtained in step b, add 8% Water, add water and stir evenly, then pour into the mold, vibrate on a vibrating table or with the help of a vibrating rod to form, and obtain a prefabricated part after forming;

[0033] d. Curing the preform obtained in step c for 1 day in the mold at room temperature of 25°C, then demoulding, and then curing naturally for 1 day at room temperature of 25°C, and putting the preform after natural curing into baking Carry out baking in the kiln, the baking temperature is 120 ℃, and the baking time is 40 hours;

[0034] e. Put the prefabricated part baked in step d into a high-temperature kiln, and fire it at a high temperature of 1450 ° C. When it reaches 1450 ° C, the holding time is 24 hours. After firing, stop the kiln, cool to room temperature, leave the kiln for re-inspection and Packing to obtain a high thermal strength and high aluminum prefabricated part containing elemental silicon.

Example Embodiment

[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 total weight of raw materials described in step a;

[0041] In step c: add to the dry blended material obtained in step b 7% water;

[0042] Step d: put the naturally cured prefab into a baking kiln for baking, the baking temperature is 150°C, and the baking time is 24 hours;

[0043] Step e: put the prefabricated part baked in step d into a high-temperature kiln, and fire at a high temperature of 1400°C, and the holding time is 30 hours when the temperature reaches 1400°C.

Example Embodiment

[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, sodium lauryl sulfate, in addition, the amount of the dispersant is 0.25% of the total weight of the raw materials described in step a;

[0050] In step c: add to the dry blended material obtained in step b 6% water;

[0051] Step d: put the naturally cured prefab into a baking kiln for baking, the baking temperature is 100°C, and the baking time is 48 hours;

[0052] Step e: put the prefabricated part baked in step d into a high-temperature kiln, and fire at a high temperature of 1500°C, and the holding time is 16 hours when the temperature reaches 1500°C.

PUM

Property	Measurement	Unit
Granularity	150.0	mesh
Granularity	200.0	mesh

Description & Claims & Application Information

We can also present the details of the Description, Claims and Application information to help users get a comprehensive understanding of the technical details of the patent, such as background art, summary of invention, brief description of drawings, description of embodiments, and other original content. On the other hand, users can also determine the specific scope of protection of the technology through the list of claims; as well as understand the changes in the life cycle of the technology with the presentation of the patent timeline. Login to view more.

Classification and recommendation of technical efficacy words

Improve volume stability

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

AI-Extracted Technical Summary

Problems solved by technology

Abstract

Examples

Example Embodiment

Example Embodiment

Example Embodiment

PUM

Description & Claims & Application Information

Similar technology patents

C190 strength-grade concrete for formed steel concrete composite structure

Reinforcing method for silicon-based ceramic core with excellent mechanical property

RPC cover plate for subway evacuation platform and preparation method of RPC cover plate

Primary layer coating used for investment casting shell

Special copper alloy and manufacturing method thereof

High-performance panel concrete and preparation method thereof

Hardening agent for investment casting

Classification and recommendation of technical efficacy words

C190 strength-grade concrete for formed steel concrete composite structure

High-performance panel concrete and preparation method thereof

RPC cover plate for subway evacuation platform and preparation method of RPC cover plate