CN104193356A - High-purity hollow alumina sphere brick applied to coal water slurry gasifier and preparation process thereof - Google Patents
High-purity hollow alumina sphere brick applied to coal water slurry gasifier and preparation process thereof Download PDFInfo
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- CN104193356A CN104193356A CN201410396340.0A CN201410396340A CN104193356A CN 104193356 A CN104193356 A CN 104193356A CN 201410396340 A CN201410396340 A CN 201410396340A CN 104193356 A CN104193356 A CN 104193356A
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Abstract
The invention discloses a high-purity hollow alumina sphere brick applied to a coal water slurry gasifier. The high-purity hollow alumina sphere brick comprises the following components in percentage by weight: 8-17% of hollow alumina spheres with diameter of 3-2mm, 23-40% of hollow alumina spheres with diameter of 2-1mm, 18-25% of hollow alumina spheres with diameter of 1-0.2mm, 7-13% of fused alumina powder and 20-25% of alpha-Al2O3 micropowder; the high-purity hollow alumina sphere brick also comprises the following additional components in percentage by weight: 0.8-1.3% of calcium carbonate, 8-12% of yellow dextrin or calcium lignosulphonate aqueous solution and 0.5% of rho-Al2O3 micropowder. The invention also discloses a preparation method of the hollow alumina sphere brick. According to the preparation method of the hollow alumina sphere brick, a CA6 combination phase is formed in a matrix, therefore the problem of the conventional method that SiO2 content is increased and use temperature is reduced due to adoption of a mode of introducing SiO2 into the hollow alumina sphere brick to form a mullite combination phase can be completely overcome.
Description
Technical field
The invention belongs to refractory materials, be specifically related to high-purity alumina hollow ball brick and preparation technology thereof for a kind of coal slurry gasifier.
Background technology
Because having, the advantage such as alumina content is high, volume density is little, hot strength is large, use temperature is high, thermal conductivity is little, save energy is widely used in petrochemical industry high temperature kiln to high-purity alumina hollow ball brick, it both can be used as heat-insulating heat-preserving material, also can be used for hot operation lining material.
The principal crystalline phase of alumina bubble brick is corundum phase, as too high in purity, not having liquid phase to generate will cause its sintering very difficult, therefore traditional alumina bubble brick production is in batching, suitably to introduce a certain amount of silicon-dioxide (adding silicon powder or clay), by silicon-dioxide in sintering process, react with aluminum oxide and in matrix, generate mullite phase, form mullite bonded and obtain sintering, and produce intensity, but the method directly causes silicone content to increase, and the use temperature of simultaneous oxidation aluminium hollow ball brick also can decline.
Coal slurry gasifier is with insulating lining alumina bubble brick general requirement alumina content more than 98%, and stricter requirement reaches more than 99%, and dioxide-containing silica is controlled very strict, is generally and is less than or equal to 0.3%.Due to the harsh requirement of coal slurry gasifier to alumina bubble brick, the method for introducing silicon-dioxide acceleration of sintering formation mullite bonded by direct or indirect mode is infeasible.Therefore find a kind of can replacement of silicon dioxide, accelerating oxidation aluminium hollow ball brick high temperature sintering, the production technique that does not affect its performance is simultaneously most important.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of alumina bubble brick that can meet coal slurry gasifier service requirements.
The technical problem that the present invention also will solve is to provide the preparation method of above-mentioned alumina bubble brick.
For solving the problems of the technologies described above, the technical solution used in the present invention is as follows:
A coal slurry gasifier high-purity alumina hollow ball brick, it comprises the component of following weight percent:
Above weight percentages of components sum is 100%, the component of additionally adding following weight percent, and the calculating benchmark of addition is upper composition weight sum:
Calcium carbonate 0.8%～1.3%
The yellow starch gum aqueous solution or the calcium lignin sulphonate aqueous solution 8～12%
ρ-Al
2o
3micro mist 0.5%.
The present invention preferably fills a prescription, and comprises the component of following weight percent:
Above weight percentages of components sum is 100%, preferably additionally adds the component of following weight percent, and the calculating benchmark of addition is upper composition weight sum:
Calcium carbonate 0.8%～1.2%
The yellow starch gum aqueous solution or the calcium lignin sulphonate aqueous solution 8～9%
ρ-Al
2o
3micro mist 0.5%.
Wherein, described fused corundom powder footpath is 325 orders.
Wherein, described α-Al
2o
3grain size of micropowder is 1000 orders.
Wherein, described ρ-Al
2o
3micro mist specific surface area is 200m
2/ g.
Wherein, yellow starch gum or calcium lignin sulphonate concentration of aqueous solution are 30wt%.
Prepare the method for high-purity alumina hollow ball brick for above-mentioned coal slurry gasifier, it comprises the steps:
(1) premix fine powder: weigh 325 order fused corundom powder, α-Al by formula ratio
2o
3micro mist, calcium carbonate, ρ-Al
2o
3micro mist adds in premixing machine and to stir until mix;
(2) aggregate mixes: by formula ratio 3～2mm, 2～1mm, 1～0.2mm alumina hollow ball, pour in mixer, be dry mixed 3～5 minutes, then the yellow starch gum or the calcium lignin sulphonate aqueous solution that add 2/3 formula ratio, mixing 5～8 minutes, make alumina hollow ball particle surface fully moistening, then add the premix fine powder that step (1) obtains to stir 3～5 minutes, last yellow starch gum or the calcium lignin sulphonate aqueous solution that adds again remaining 1/3 formula ratio, fully stirs discharging in 10-20 minute;
(3) moulding: adopt hydraulic vibration moulding;
(4) dry: dry 24-48h at 70-140 ℃;
(5) burn till: at 1700-1750 ℃, be incubated 3-5h.
In step (4), described oven dry is carried out in dry kiln.
In step (5), described burning till in high-temperature shuttle kiln carried out.
Raw material used in the present invention:
(1) high-purity alumina hollow ball is Al
2o
3content>=99%, SiO
2content≤0.18%, size comprises 3-2mm, 2-1mm, tri-kinds of 1-0.2mm;
(2) fused corundom powder Al
2o
3content>=99%, SiO
2content≤0.18%, size is 325 orders;
(3) α-Al
2o
3micro mist Al
2o
3content>=99%, SiO
2content≤0.18%, introduces micro mist, improves reactive behavior, and acceleration of sintering is alleviated sintering difficult problem;
(4) calcium carbonate can be a kind of in light calcium carbonate, nano-calcium carbonate calcium powder, ordinary calcium carbonate micro mist.By introducing calcium carbonate, can utilize on the one hand it 700 ℃ of left and right, to start to decompose generation active CaO and CO
2, in alumina bubble brick, form a large amount of pores, increase the apparent porosity of brick; Utilize on the other hand the active CaO generating after Decomposition of Calcium Carbonate at 1300 ℃ of later and Al
2o
3reaction generates gradually CA, CA in matrix
2, CA
6, when temperature is elevated to 1500 ℃ of main CA of formation later
6in conjunction with phase, along with temperature continues to raise, CA6 crystal is constantly grown up, and brick body is tending towards sintering.The method can improve the intensity of brick, also can evade special introducing SiO simultaneously
2form the traditional method of mullite bonded phase, reduce SiO
2content;
(5) mix ρ-Al
2o
3, utilize that it is active large, poor heat stability, in the characteristics such as steady state that are situated between, improve reactive behavior in sintering process, acceleration of sintering, alleviates sintering difficult problem;
Beneficial effect: the present invention compared with prior art has following advantage:
(1) adopt multiple stage material compounding, add ρ-Al
2o
3acceleration of sintering reactive behavior, the problem of alleviation sintering difficulty;
(2) chemical composition purity is high, and seldom, especially Si content is low for foreign matter content;
(3) evaded special introducing SiO
2the traditional method that forms mullite bonded phase, effectively reduces SiO
2content forms CA6 in conjunction with phase by introducing calcium carbonate in matrix, can effectively reduce or avoid the generation of silicon migration in materials'use process, also can improve the use temperature of material simultaneously;
(4) volume density is little, void content is high, thermal conductivity is low, can effectively reduce heat loss, energy-conserving and environment-protective;
(5) intensity is higher, can meet that kiln is built by laying bricks or stones and service requirements, guarantees that coal slurry gasifier runs well.
Embodiment
According to following embodiment, the present invention may be better understood.Yet, those skilled in the art will readily understand, the described content of embodiment is only for the present invention is described, and should also can not limit the present invention described in detail in claims.
Embodiment 1:
A coal slurry gasifier high-purity alumina hollow ball brick, it comprises the component of following weight percent:
Above weight percentages of components sum is 100%, the component of additionally adding following weight percent, and the calculating benchmark of addition is upper composition weight sum:
Calcium carbonate 1%
The yellow starch gum aqueous solution 8%
ρ-Al
2o
3micro mist 0.5%.
Preparation method:
By formula ratio, weigh 325 order fused corundom powder, α-Al
2o
3micro mist, calcium carbonate, ρ-Al
2o
3micro mist adds in middling speed premixing machine and stirs 15 minutes to mixing, and makes premix fine powder.
By formula ratio 3～2mm, 2～1mm, 1～0.2mm alumina hollow ball, pour in mixer, be dry mixed 3 minutes, then the yellow starch gum aqueous solution that adds 2/3 formula ratio, mixing 7 minutes, make alumina hollow ball particle surface fully moistening, then add premix fine powder to stir 3 minutes, the last yellow starch gum aqueous solution that adds again remaining 1/3 formula ratio, fully stirs discharging in 18 minutes.Through hydraulic vibration moulding, dry 48h for 110 ℃, 1730 ℃ of insulation 3h high temperature of shuttle kiln burn till.
Embodiment 2:
A coal slurry gasifier high-purity alumina hollow ball brick, it comprises the component of following weight percent:
Above weight percentages of components sum is 100%, the component of additionally adding following weight percent, and the calculating benchmark of addition is upper composition weight sum:
Calcium carbonate 0.8%
The calcium lignin sulphonate aqueous solution 8.5%
ρ-Al
2o
3micro mist 0.5%.
Preparation method:
By formula ratio, weigh 325 order fused corundom powder, α-Al
2o
3micro mist, calcium carbonate, ρ-Al
2o
3micro mist adds in middling speed premixing machine and stirs and to mixing, make premix fine powder in 15 minutes.
By formula ratio 3～2mm, 2～1mm, 1～0.2mm alumina hollow ball, pour in mixer, be dry mixed 4 minutes, then the calcium lignin sulphonate aqueous solution that adds 2/3 formula ratio, mixing 6 minutes, make alumina hollow ball particle surface fully moistening, then add premix fine powder to stir 4 minutes, the last calcium lignin sulphonate aqueous solution that adds again remaining 1/3 formula ratio, fully stirs discharging in 20 minutes.Through hydraulic vibration moulding, dry 48h for 110 ℃, 1700 ℃ of insulation 4h high temperature of shuttle kiln burn till.
Embodiment 3:
A coal slurry gasifier high-purity alumina hollow ball brick, it comprises the component of following weight percent:
Above weight percentages of components sum is 100%, the component of additionally adding following weight percent, and the calculating benchmark of addition is upper composition weight sum:
Calcium carbonate 1.2%
The calcium lignin sulphonate aqueous solution 9%
ρ-Al
2o
3micro mist 0.5%.
Preparation method:
By formula ratio, weigh 325 order fused corundom powder, α-Al
2o
3micro mist, calcium carbonate, ρ-Al
2o
3micro mist adds in middling speed premixing machine and stirs and to mixing, make premix fine powder in 15 minutes.
By formula ratio 3～2mm, 2～1mm, 1～0.2mm alumina hollow ball, pour in mixer, be dry mixed 5 minutes, then the calcium lignin sulphonate aqueous solution that adds 2/3 formula ratio, mixing 6 minutes, make alumina hollow ball particle surface fully moistening, then add premix fine powder to stir 5 minutes, the last calcium lignin sulphonate aqueous solution that adds again remaining 1/3 formula ratio, fully stirs discharging in 20 minutes.Through hydraulic vibration moulding, dry 48h for 110 ℃, 1700 ℃ of insulation 3.5h high temperature of shuttle kiln burn till.
The product detected result of embodiment 1～3 is in Table 1.
Table 1
| Project | Embodiment 1 | Embodiment 2 | Embodiment 3 | Certain user requires index |
| Al 2O 3 | 99.04 | 99.10 | 98.85 | ≥98.5 |
| SiO 2 | 0.25 | 0.22 | 0.22 | ≤0.30 |
| Fe 2O 3 | 0.28 | 0.28 | 0.29 | ≤0.30 |
| Volume density (g/cm 3) | 1.50 | 1.48 | 1.49 | 1.40～1.50 |
| Cold crushing strength (MPa) | 12 | 11.5 | 15 | ≥8 |
| 800 ℃ of thermal conductivitys (w/m.k) | 0.82 | 0.83 | 0.835 | ≤0.9 |
From above actual measurement index, can find out, alumina bubble brick of the present invention can meet the design requirements of user's coal slurry gasifier.
Claims (6)
1. a coal slurry gasifier high-purity alumina hollow ball brick, is characterized in that, it comprises the component of following weight percent:
Above weight percentages of components sum is 100%, the component of additionally adding following weight percent, and the calculating benchmark of addition is upper composition weight sum:
Calcium carbonate 0.8%～1.3%
The yellow starch gum aqueous solution or the calcium lignin sulphonate aqueous solution 8～12%
ρ-Al
2o
3micro mist 0.5%.
2. coal slurry gasifier according to claim 1 high-purity alumina hollow ball brick, is characterized in that, described fused corundom powder footpath is 325 orders.
3. coal slurry gasifier according to claim 1 high-purity alumina hollow ball brick, is characterized in that, the described yellow starch gum aqueous solution or the calcium lignin sulphonate aqueous solution, and solute concentration is 30wt%.
4. prepare described in claim 1 method for high-purity alumina hollow ball brick for coal slurry gasifier, it is characterized in that, it comprises the steps:
(1) premix fine powder: weigh 325 order fused corundom powder, α-Al by formula ratio
2o
3micro mist, calcium carbonate, ρ-Al
2o
3micro mist adds in premixing machine and to stir until mix;
(2) aggregate mixes: by formula ratio 3～2mm, 2～1mm, 1～0.2mm alumina hollow ball, pour in mixer, be dry mixed 3～5 minutes, then the yellow starch gum or the calcium lignin sulphonate aqueous solution that add 2/3 formula ratio, mixing 5～8 minutes, make alumina hollow ball particle surface fully moistening, then add the premix fine powder that step (1) obtains to stir 3～5 minutes, last yellow starch gum or the calcium lignin sulphonate aqueous solution that adds again remaining 1/3 formula ratio, fully stirs discharging in 10-20 minute;
(3) moulding: adopt hydraulic vibration moulding;
(4) dry: dry 24-48h at 70-140 ℃;
(5) burn till: at 1700-1750 ℃, be incubated 3-5h.
5. preparation method according to claim 4, is characterized in that, in step (4), described oven dry is carried out in dry kiln.
6. preparation method according to claim 4, is characterized in that, in step (5), described burning till in high-temperature shuttle kiln carried out.
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|---|---|---|---|
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|---|---|---|---|
| CN201410396340.0A CN104193356B (en) | 2014-08-12 | 2014-08-12 | A kind of coal slurry gasifier high-purity alumina hollow ball brick and preparation technology thereof |
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| CN104193356B CN104193356B (en) | 2015-09-23 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104671802A (en) * | 2015-01-16 | 2015-06-03 | 长兴正发热电耐火材料有限公司 | Lightweight thermal insulation refractory mortar and preparation method thereof |
| CN105294024A (en) * | 2015-11-19 | 2016-02-03 | 长兴县新宏信耐火材料有限公司 | Novel alumina bubble brick |
| CN105399407A (en) * | 2015-11-19 | 2016-03-16 | 长兴县新宏信耐火材料有限公司 | Preparation method for novel aluminium oxide hollow ball brick |
| CN105859315A (en) * | 2016-03-31 | 2016-08-17 | 武汉科技大学 | Lightweight dispersion-type ventilating brick and preparation method thereof |
| CN107235741A (en) * | 2017-06-30 | 2017-10-10 | 长兴泓矿炉料有限公司 | A kind of New type of light refractory material |
| CN107244907A (en) * | 2017-05-26 | 2017-10-13 | 长兴华悦耐火材料厂 | A kind of toughening aluminum oxide hollow balls brick |
| CN114368974A (en) * | 2022-01-21 | 2022-04-19 | 巩义市神南特种耐火材料厂 | Alumina hollow ball brick and preparation method thereof |
| CN116639999A (en) * | 2023-05-26 | 2023-08-25 | 武汉科技大学 | Alumina hollow sphere ceramic filter material and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101113100A (en) * | 2007-06-30 | 2008-01-30 | 郑州大学 | High-purity corundum pouring material containing nano calcium carbonate and preparation method thereof |
| CN102276276A (en) * | 2011-07-22 | 2011-12-14 | 中钢集团洛阳耐火材料研究院有限公司 | Alumina hollow ball insulation product |
| CN103708841A (en) * | 2013-12-05 | 2014-04-09 | 山东耐材集团鲁耐窑业有限公司 | High strength and high thermal shock alumina bubble brick and preparation method thereof |
-
2014
- 2014-08-12 CN CN201410396340.0A patent/CN104193356B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101113100A (en) * | 2007-06-30 | 2008-01-30 | 郑州大学 | High-purity corundum pouring material containing nano calcium carbonate and preparation method thereof |
| CN102276276A (en) * | 2011-07-22 | 2011-12-14 | 中钢集团洛阳耐火材料研究院有限公司 | Alumina hollow ball insulation product |
| CN103708841A (en) * | 2013-12-05 | 2014-04-09 | 山东耐材集团鲁耐窑业有限公司 | High strength and high thermal shock alumina bubble brick and preparation method thereof |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104671802A (en) * | 2015-01-16 | 2015-06-03 | 长兴正发热电耐火材料有限公司 | Lightweight thermal insulation refractory mortar and preparation method thereof |
| CN104671802B (en) * | 2015-01-16 | 2017-01-04 | 长兴正发热电耐火材料有限公司 | A kind of light thermal-shield refractory mud and preparation method thereof |
| CN105294024A (en) * | 2015-11-19 | 2016-02-03 | 长兴县新宏信耐火材料有限公司 | Novel alumina bubble brick |
| CN105399407A (en) * | 2015-11-19 | 2016-03-16 | 长兴县新宏信耐火材料有限公司 | Preparation method for novel aluminium oxide hollow ball brick |
| CN105859315A (en) * | 2016-03-31 | 2016-08-17 | 武汉科技大学 | Lightweight dispersion-type ventilating brick and preparation method thereof |
| CN105859315B (en) * | 2016-03-31 | 2019-03-19 | 武汉科技大学 | A kind of lightweight dispersive air brick and preparation method thereof |
| CN107244907A (en) * | 2017-05-26 | 2017-10-13 | 长兴华悦耐火材料厂 | A kind of toughening aluminum oxide hollow balls brick |
| CN107235741A (en) * | 2017-06-30 | 2017-10-10 | 长兴泓矿炉料有限公司 | A kind of New type of light refractory material |
| CN114368974A (en) * | 2022-01-21 | 2022-04-19 | 巩义市神南特种耐火材料厂 | Alumina hollow ball brick and preparation method thereof |
| CN116639999A (en) * | 2023-05-26 | 2023-08-25 | 武汉科技大学 | Alumina hollow sphere ceramic filter material and preparation method thereof |
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