CN1450025A - Clayless refractory mouldable material - Google Patents
Clayless refractory mouldable material Download PDFInfo
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- CN1450025A CN1450025A CN 03113434 CN03113434A CN1450025A CN 1450025 A CN1450025 A CN 1450025A CN 03113434 CN03113434 CN 03113434 CN 03113434 A CN03113434 A CN 03113434A CN 1450025 A CN1450025 A CN 1450025A
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Abstract
The present invention relates to a clay-free plasticity refractory material, belonging to the field of refractory material. Its composition includes fire-resistant aggregate, powder material and chemical binding agent, and also contains amorphous Al2O3 fine powder, the described amorphous alumina is obtained by using industrial aluminium hydroxide through the processes of suspension heating at 600 deg.C-700 deg.C and air quenching. Said invention adopts the high-activity amorphous Al2O3 fine powder instead of raw clay to prepare plasticity refractory material, so that its plasticity is good, it is has higher normal temp. strength and excellent linear change property, its refractory aggregate and powder material can be changed for different requirements of thermal engineering equipments.
Description
Technical field
The present invention relates to a kind of refractory materials, refer to a kind of no clay plastic refractory especially.
Technical background
General plastic refractory is to mix, be squeezed into the adobe shape with refractory aggregate, powder, raw clay and chemically composited wedding agent, admixture through preparation, still has good plasticity-behind the package storage certain hour, and the unshape refractory of available ramming method construction, mainly use on the Thermal Equipments such as fin type furnace wall of process furnace furnace roof, soaking pit furnace wall, boiler.Because raw clay is moldable plastic source, but its adding makes refractory materials low, the line variation poor-performing of intensity at normal temperatures.
Summary of the invention
The present invention provides a kind of plasticity-refractory materials that does not have clay just in order to overcome above-mentioned deficiency, and its plasticity-is good, has higher normal temperature strength again, and good line changes performance, and it mainly improves and is in the prescription of plastic refractory with a kind of amorphous Al
2O
3It is with the suspension thermal degradation of industrial aluminium hydroxide by 600 ℃-700 ℃ but gained of air quenching again that fine powder replaces raw clay, this amorphous alumina, active high.Specifically, no clay plastic refractory comprises refractory aggregate, powder and chemical bond, it is characterized in that also containing in the component amorphous Al
2O
3Fine powder, described amorphous alumina are to heat but gained of air quenching with industrial aluminium hydroxide by 600 ℃ of-700 ℃ of suspensions again.The crystalline structure of this amorphous alumina is α-Al
2O
3, β-Al
2O
3, γ-Al
2O
3, ρ-Al
2O
3The mixed body of complexity, fineness is between the 160-180 order, common add-on is 5-10%, its activity is very high, the plasticity index that can make refractory materials after the adding is 30-40%.Like this, the total proportion relation of no clay plastic refractory is as follows: (weight percent)
Refractory aggregate 55-70%
Refractory powder 20-40%
Amorphous alumina 180-200 order 5-10%
Add:
Chemically composited wedding agent 7-10%
In order to make the moldable better properties that has, also adding in the powder of refractory materials has fine silica powder, the granularity of described fine silica powder to be controlled at less than 5 μ m, and add-on is 3-4%.Fine silica powder can make the moldable mullite that at high temperature produces, and has improved moldable intensity, and its volume produces and expands, and offsets moldable because the contraction of nodulizing.
Chemically composited wedding agent in moldable is the aqueous solution of aluminum phosphate or Tai-Ace S 150 and the mixture of preservatives, preservatives can be oxalic acid, citric acid, sulfonated lignin etc., this wedding agent can make the moldable good plasticity-that has in a long time, and preservation period was greater than 6 months.
The present invention can be according to the working condition of Thermal Equipment, change refractory aggregate and powder in the proportioning, as use the pusher-type furnace furnace roof, use temperature is about 1200-1300 ℃, can use secondary alumina aggregate and powder, if use at boiler hearth of circulating fluidized bed fin furnace wall, its aggregate and powder can adopt hard refractory aggregates such as one-level alumina, brown corundum, sub-white corundum, if use at some anti-thermal shock is required than higher, use temperature again than higher Thermal Equipment, refractory aggregate and powder can be considered mullite etc.
The present invention adopts the amorphous Al of high reactivity just
2O
3The plasticity-refractory materials that fine powder replaces raw clay to obtain, its plasticity-is good, has higher normal temperature strength, and good line changes performance, its also replaceable refractory aggregate and powder, suitable different Thermal Equipment requirement, range of application is wide.
Embodiment
Embodiment 1, uses the no clay plastic refractory at boiler hearth of circulating fluidized bed fin furnace wall, and its component proportioning is: (weight percent)
65 parts in palm fibre corundum aggregate
25 parts in brown alundum powder material
3 parts of fine silica powders＜5 μ m
Amorphous alumina 180-200 order 7 adds especially:
8 parts of aluminium phosphate aqueous solutions
1 part of citric acid
This no clay plastic refractory after testing, performance perameter is:
Volume density: 2.8-2.9g/cm
3
Compressive strength (1000 ℃ * 3h): 〉=100Mpa
Wearability :≤7cc
Burning the back line changes: (1000 ℃ * 3h):＜-0.3%
Embodiment 2, are applicable to the no clay plastic refractory of pusher-type furnace furnace roof, and its component proportioning is: (weight percent)
62 parts in one-level alumina aggregate
24 parts of secondary alumina powders
4 parts of fine silica powders＜5 μ m
Amorphous alumina 180-200 order 10 adds especially:
8.5 parts of aluminum sulfate aqueous solutions
1.5 parts of oxalic acid
This no clay plastic refractory after testing, performance perameter is:
Volume density: 2.5-2.6g/cm
3
Compressive strength (1250 ℃ * 3h): 〉=60Mpa
Burning the back line changes: (1250 ℃ * 3h) :≤-0.25%
Embodiment 3, are applicable to the no clay plastic refractory of the Thermal Equipment that temperature is higher and temperature fluctuation is bigger, and its component proportioning is: (weight percent)
68 parts of mullite aggregates
20 parts of porzite powders
3 parts of fine silica powders＜5 μ m
Amorphous alumina 180-200 order 9 adds especially:
7 parts of aluminium phosphate aqueous solutions
1.8 parts of sulfonated lignin
This no clay plastic refractory after testing, performance perameter is:
Volume density: 2.5-2.6g/cm
3
Compressive strength (1500 ℃ * 3h): 〉=90Mpa
Line variation after burning (1450 ℃ * 3h): 0--+0.15%
Anti-thermal shock stability (1100 ℃, water-cooled): 〉=35 times
Claims (6)
1. do not have the clay plastic refractory, comprise refractory aggregate, powder and chemical bond, it is characterized in that also containing in the component amorphous Al
2O
3Fine powder, described amorphous alumina are to heat but gained of air quenching with industrial aluminium hydroxide by 600 ℃ of-700 ℃ of suspensions again.
2. no clay plastic refractory according to claim 1 is characterized in that amorphous Al
2O
3The fineness of fine powder is between the 160-180 order.
3. no clay plastic refractory according to claim 1 and 2 is characterized in that amorphous Al
2O
3The add-on of fine powder in component is 5-10%.
4. no clay plastic refractory according to claim 3 is characterized in that the component proportioning is: (weight percent)
Refractory aggregate 55-70%
Refractory powder 20-40%
Amorphous alumina 180-200 order 5-10%
Add:
Chemically composited wedding agent 7-10%
5. no clay plastic refractory according to claim 4 is characterized in that adding has fine silica powder in the refractory powder, and the granularity of described fine silica powder is less than 5 μ m, and add-on is 3-4%.
6. no clay plastic refractory according to claim 4 is characterized in that chemically composited wedding agent is the aqueous solution of aluminum phosphate or Tai-Ace S 150 and the mixture of preservatives, and described preservatives is oxalic acid or citric acid or sulfonated lignin etc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03113434 CN1272284C (en) | 2003-05-09 | 2003-05-09 | Clayless refractory mouldable material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03113434 CN1272284C (en) | 2003-05-09 | 2003-05-09 | Clayless refractory mouldable material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1450025A true CN1450025A (en) | 2003-10-22 |
| CN1272284C CN1272284C (en) | 2006-08-30 |
Family
ID=28684072
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03113434 Expired - Fee Related CN1272284C (en) | 2003-05-09 | 2003-05-09 | Clayless refractory mouldable material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1272284C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103771887A (en) * | 2014-01-29 | 2014-05-07 | 上海彭浦特种耐火材料厂有限公司 | Magnesium-aluminum ramming material for RH furnace |
| CN109206129A (en) * | 2018-09-25 | 2019-01-15 | 宜兴市集创新材料科技有限公司 | A kind of mullite Multiphase high-strength wearable is moldable and preparation method thereof |
| CN110128156A (en) * | 2019-06-19 | 2019-08-16 | 武汉市科达耐火有限责任公司 | Blast furnace iron notch mud covers reparation plastic refractory and preparation method thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106995309A (en) * | 2017-05-09 | 2017-08-01 | 郑州耐都热陶瓷有限公司 | Fire resisting liner body crack is squeegeeed material |
-
2003
- 2003-05-09 CN CN 03113434 patent/CN1272284C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103771887A (en) * | 2014-01-29 | 2014-05-07 | 上海彭浦特种耐火材料厂有限公司 | Magnesium-aluminum ramming material for RH furnace |
| CN109206129A (en) * | 2018-09-25 | 2019-01-15 | 宜兴市集创新材料科技有限公司 | A kind of mullite Multiphase high-strength wearable is moldable and preparation method thereof |
| CN110128156A (en) * | 2019-06-19 | 2019-08-16 | 武汉市科达耐火有限责任公司 | Blast furnace iron notch mud covers reparation plastic refractory and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1272284C (en) | 2006-08-30 |
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| C14 | Grant of patent or utility model | ||
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Denomination of invention: Clayless refractory mouldable material Effective date of registration: 20131216 Granted publication date: 20060830 Pledgee: Bank of Jiangsu, Limited by Share Ltd, Yixing branch Pledgor: Tianba Non-Metal Material Co., Ltd. Yixing Registration number: 2013320000011 |
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