CN104692628A - AZC (alumina-zirconia-chromium sesquioxide) lattice brick, manufacturing method of AZC lattice brick and heat accumulation chamber built of AZC lattice brick - Google Patents
AZC (alumina-zirconia-chromium sesquioxide) lattice brick, manufacturing method of AZC lattice brick and heat accumulation chamber built of AZC lattice brick Download PDFInfo
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- CN104692628A CN104692628A CN201510074104.1A CN201510074104A CN104692628A CN 104692628 A CN104692628 A CN 104692628A CN 201510074104 A CN201510074104 A CN 201510074104A CN 104692628 A CN104692628 A CN 104692628A
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- chromium sesquioxide
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Abstract
The invention discloses an AZC (alumina-zirconia-chromium sesquioxide) lattice brick, a manufacturing method of the AZC lattice brick and a heat accumulation chamber built of the AZC lattice brick. The AZC lattice brick is manufactured from the following components in percentage by weight: 70-75% of alumina, 7-12% of zirconia, 6-10% of chromium sesquioxide and 9-12% of aluminum phosphate, wherein the chromium sesquioxide is prepared by calcining waste chromium sesquioxide twice, and the chromium sesquioxide has a particle size of more than 6,000 meshes. The AZC lattice brick has quite low apparent porosity, high bulk density, high compression strength at normal temperature and high refractoriness under the load of 0.2MPa. External substances (harmful gases generated during the combustion of petroleum coke) can be prevented from intruding into the AZC lattice brick so that the organizational structures of refractory materials can be kept intact. In addition, the AZC lattice brick has strong capacity of resisting the erosion of harmful gases generated during the combustion of petroleum coke and has good creep resistance.
Description
Technical field
The present invention relates to a kind of refractory materials, particularly relate to a kind of for refinery coke float glass process regenerator checker brick (AZC brick) and preparation method thereof, also relate to the regenerator utilizing these AZC checker brick to arrange.
Background technology
At present, glass melter utilizes the high fuel of this heat content of refinery coke to carry out alternative conventional fuel and produces glass, and this is the effective means of energy efficient, emissions reduction, reduction manufacturing cost and raising glass melter level.But, refinery coke can discharge the gases such as Vanadium Pentoxide in FLAKES, sulphur, nickel oxide in combustion, and its corrodibility is extremely strong, not only can the upper space of erosion of refractory and glass furnace, and obviously accelerate the damage speed of refractory materials, thus greatly reduced in the work-ing life of glass melter.Add up according to relevant applying unit, after adopting oil Jiaozhuo fuel, the kiln of float glass furnace is only to about 6-8 month age.Therefore, above-mentioned technical barrier urgently to be resolved hurrily.
Summary of the invention
Goal of the invention: the first object of the present invention is to provide a kind of combustion atmosphere, the refinery coke float glass process regenerator AZC checker brick that extend glass melter work-ing life that can resist refinery coke;
The second object of the present invention is to provide the preparation method of above-mentioned checker brick;
The third object of the present invention is to provide the refinery coke regenerator utilizing above-mentioned checker brick to arrange.
Technical scheme: AZC checker brick of the present invention, comprise following component by weight percentage: aluminum oxide 70-75%, zirconium dioxide 7-12%, chromium sesquioxide 6-10% and aluminum phosphate 9-12%; Wherein, described chromium sesquioxide is formed by waste material chromium sesquioxide double sintering, and its particle size is more than 6000 orders.
Wherein, the temperature of waste material chromium sesquioxide double sintering is 1800-2000 DEG C, and the time is 2-6h, so can realize waste material recycling, resources circulation.
The purity of aluminum oxide is more than 99.9%, and its particle size is more than 6000 orders; The purity of described zirconium dioxide is more than 99.9%; The purity of described chromium sesquioxide is more than 80.0%.
Can also comprise weight percent in AZC checker brick is 2.5-5% carboxymethyl cellulose.
The rare earth B nucleator that weight percent is 0.3-3% can also be comprised in AZC checker brick.
The preparation method of AZC checker brick of the present invention, carries out shaping compacting, drying, sintering and insulation successively after comprising the steps: the raw material mixing needed for being prepared by AZC checker brick, to obtain final product.
Wherein, the temperature of sintering is 1550-1650 DEG C, and the time of sintering is 48-60h, and the time of insulation is 4-6h.
The regenerator utilizing AZC checker brick to arrange of the present invention, the inner fragment of brick of regenerator being distributed as from bottom to top: 1-19 layer is sillimanite, 20-59 layer is AZS-33 zircon corundum brick, 60-70 layer is AZC checker brick, 71-72 layer is 70Z zirconia block, wherein, in described AZS zircon corundum brick, the weight percent of zirconium dioxide is 33%;
Beneficial effect: the present invention compared with prior art, its remarkable advantage is: AZC checker brick of the present invention have very low apparent porosity, higher volume density, cold crushing strength and 0.2MPa refractoriness under load, effectively can prevent exterior materials (the harmful atmosphere produced in petroleum coke during combustion) from invading fragment of brick inside, keep the integrity of refractory materials weave construction; And the harmful atmosphere of this fragment of brick to petroleum coke combustion has stronger erosion resistance and creep resistance; Meanwhile, the preparation method of these AZC checker brick is simple, easily realizes, practical; In addition, AZC checker brick of the present invention can be used for arranging regenerator, it is positioned at regenerator upper strata (60-70 layer), regenerator bottom (1-19 layer) is sillimanite, middle level (20-59 layer) is AZS-33 zircon corundum, top layer (71-72 layer) is 70Z zirconia block, so can greatly reduce or avoid harmful atmosphere to the erosion of regenerator inside fragment of brick, thus greatly improves the work-ing life of regenerator and glass melter.
Embodiment
AZC checker brick of the present invention are mainly used in refinery coke float glass process regenerator, the main component of these checker brick comprises (by weight percentage, lower same): aluminum oxide 70-75%, zirconium dioxide 7-12%, chromium sesquioxide 6-10% and aluminum phosphate 9-12%, therefore be called for short AZC checker brick (getting the initial of first three composition), this fragment of brick has very low apparent porosity, higher volume density, cold crushing strength and 0.2MPa refractoriness under load, can be used for resisting the gas such as Vanadium Pentoxide in FLAKES, sulphur, nickel oxide discharged in petroleum coke during combustion.
Waste material chromium sesquioxide is material discarded after using, and is difficult to degraded, normally buried process.And discarded chromium sesquioxide is obtained through double sintering the chromium sesquioxide that particle size is more than 6000 orders by the present invention just, achieve the regeneration of resource; Wherein, the temperature of double sintering controls at 1800-2000 DEG C, sintering time controls at 2-6h, and the ultra-fine alumina (nano level) that can add trace (such as about 3%) during sintering, as bonding agent, impels its sintering to form the chromium sesquioxide of ultra-fine grain.
In order to improve the solute effect of above-mentioned four kinds of raw materials, we can add carboxymethyl cellulose (CMC) in fragment of brick, and add-on controls at 2.5-5%, is the solute effect in order to improve raw material further.
In order to improve the thermal shock resistance of fragment of brick, we can add rare earth B nucleator in fragment of brick, and add-on controls at 0.3-3%, are the thermal shock resistances in order to improve fragment of brick further.
Certainly, we can add the rare earth B nucleator of 2.5-5% carboxymethyl cellulose and 0.3-3% in fragment of brick simultaneously, and the purity of controlled oxidization aluminium is more than 99.9%, and particle size is more than 6000 orders; The purity of zirconium dioxide is more than 99.9%; The purity of chromium sesquioxide is more than 80.0%; The fragment of brick compactness so made is good, material is hard, wear resistance is strong, high temperature resistant, simultaneously its anti-erosion, resistance to erosion, heat absorption rate also can be better.
Table 1 is the technical parameter of all kinds of fragment of brick
As shown in Table 1, AZC fragment of brick of the present invention has lower apparent porosity, higher volume density, cold crushing strength and refractoriness under load, this illustrates that the hole of this fragment of brick is less, compactness is good, and physical strength is high, greatly reduces entering of harmful atmosphere and slag, keep the integrity of fragment of brick weave construction, and to harmful atmosphere, there is stronger erosion resistance and creep resistance; This fragment of brick all has higher compressive strength under normal temperature and high temperature (1700 DEG C) situation simultaneously, is applicable to the upper position (60-70 layer) of refinery coke regenerator.
Existing regenerator bottom (less than 20 layers) uses the alkaline fragments of brick such as magnesia brick more, the obnoxious flavoures such as the alum volatilized in petroleum coke during combustion, sulphur can impel the volatilization of this kind of alkaline fragment of brick neutral and alkali gas, and this alkaline gas can destroy the al composition in alkaline fragment of brick, directly cause the damage of alkaline fragment of brick thus, thus accelerate the damage speed of the inner underlying block of regenerator and overall fragment of brick.The present invention is through research trial for many years, AZC checker brick are placed in the upper strata (60-70 layer) of regenerator, because weathering property of regenerator upper space is the strongest, top layer (71-72 layer) uses 70Z zirconia block (describing in detail it below), bottom (1-19 layer) uses sillimanite, middle level (20-59 layer) uses AZS-33 zircon corundum brick (zirconium content is 33%), the regenerator so obtained, its inner fragment of brick can weaken or avoid the erosion of petroleum coke combustion atmosphere from top to bottom greatly, the work-ing life of regenerator is extended to more than 3 years, solve the difficult problem existed in prior art.
The described 70Z zirconia block mentioned, comprises following component: zirconium dioxide 70 ~ 85%, silicon-dioxide 9 ~ 20%, silicon sol 3 ~ 8%, ultra-fine alumina 1 ~ 3% by weight percentage.
Wherein, the rare earth B nucleator that weight percent is 0.3-3% can also be comprised in above-mentioned 70Z zirconia block.Meanwhile, can also comprise weight percent is 2.5-5% carboxymethyl cellulose.
The preparation method of 70Z zirconia block, comprises the steps: to carry out shaping compacting, drying, sintering and insulation successively by after raw material mixing, obtains described AZC checker brick.Wherein, the temperature of described sintering is 1500-1650 DEG C, and the time of sintering is 45-60h, and the time of insulation is 4-6h.
Embodiment 1
(1) raw material:
Purity is the aluminum oxide of 99.9%, 73%, and particle size is 6000 orders; Purity is the zirconium dioxide of 99.9%, 10%; Purity is the chromium sesquioxide 8% of 88%; Aluminum phosphate 10%; 3.5% carboxymethyl cellulose; 2% rare earth B nucleator.
In above-mentioned raw materials, except chromium sesquioxide and aluminum phosphate, all the other equal buyables obtain.
(2) preparation method:
1, chromium sesquioxide is prepared: waste material chromium sesquioxide is sintered 4h at temperature is 1900 DEG C, in sintering process, adds the alumina in Nano level of 3%, obtain 6000 object chromium sesquioxides;
2, aluminum phosphate is prepared: allocated forming by 1% phosphoric acid, 33% aluminum oxide and 66% water.
3, carry out shaping compacting, drying, sintering and insulation successively by after all raw material mixing, can obtain AZC brick, wherein, the temperature of sintering is 1600 DEG C, and the time of sintering is 55h, and the time of insulation is 5h.
(3) Performance Detection
Through surveying, the apparent porosity of this fragment of brick is 16%, and volume density is 3.2g/cm
3, cold crushing strength is 80MPa, 0.2MPa refractoriness under load is 1700 DEG C.
Comparative example 1
Raw material and preparation method substantially the same manner as Example 1, difference is for adding 1% carboxymethyl cellulose, and after testing, the apparent porosity of gained fragment of brick comparatively embodiment 1 increases, and volume density comparatively embodiment 1 declines to some extent.
Comparative example 2:
Raw material and preparation method substantially the same manner as Example 1, difference is for adding 5% rare earth B nucleator, and after testing, apparent porosity, the volume density of gained fragment of brick are substantially mutually similar to embodiment 1, but refractoriness under load declines to some extent.
Embodiment 2
(1) raw material:
Purity is the aluminum oxide of 99.9%, 70%, and particle size is 6000 orders; Purity is the zirconium dioxide of 99.9%, 7%; Purity is the chromium sesquioxide 6% of 80%; Aluminum phosphate 10%; 0.3% rare earth B nucleator.
(2) preparation method:
1, chromium sesquioxide is prepared: waste material chromium sesquioxide is sintered 3h at temperature is 1800 DEG C;
2, aluminum phosphate is prepared: allocated forming by 1% phosphoric acid, 33% aluminum oxide and 66% water.
3, carry out shaping compacting, drying, sintering and insulation successively by after all raw material mixing, can obtain AZC brick, wherein, the temperature of sintering is 1550 DEG C, and the time of sintering is 48h, and the time of insulation is 4h.
(3) Performance Detection
Through surveying, the apparent porosity of this fragment of brick is 16.5%, and volume density is 3.1g/cm
3, cold crushing strength is 80MPa, 0.2MPa refractoriness under load is 1700 DEG C.
Embodiment 3
(1) raw material:
Purity is the aluminum oxide of 99.9%, 75%, and particle size is 6000 orders; Purity is the zirconium dioxide of 99.9%, 12%; Purity is the chromium sesquioxide 6% of 85%; Aluminum phosphate 12%; 2.5% carboxymethyl cellulose.
In above-mentioned raw materials, except chromium sesquioxide, all the other equal buyables obtain.
(2) preparation method:
1, chromium sesquioxide is prepared: waste material chromium sesquioxide is sintered 6h at temperature is 2000 DEG C;
2, carry out shaping compacting, drying, sintering and insulation successively by after all raw material mixing, can obtain AZC brick, wherein, the temperature of sintering is 1650 DEG C, and the time of sintering is 60h, and the time of insulation is 6h.
(3) Performance Detection
Through surveying, the apparent porosity of this fragment of brick is 16.2%, and volume density is 3.15g/cm
3, cold crushing strength is 80MPa, 0.2MPa refractoriness under load is 1700 DEG C.
Embodiment 4
(1) raw material:
Purity is the aluminum oxide of 99.9%, 72%, and particle size is 6000 orders; Purity is the zirconium dioxide of 99.9%, 8%; Purity is the chromium sesquioxide 9% of 88%; Aluminum phosphate 11%; 4% carboxymethyl cellulose; 1.5% rare earth B nucleator.
In above-mentioned raw materials, except chromium sesquioxide and aluminum phosphate, all the other equal buyables obtain.
(2) preparation method:
1, chromium sesquioxide is prepared: waste material chromium sesquioxide is sintered 4h at temperature is 1900 DEG C, in sintering process, adds the alumina in Nano level of 3%, obtain 6000 object chromium sesquioxides;
2, aluminum phosphate is prepared: allocated forming by 1% phosphoric acid, 33% aluminum oxide and 66% water.
3, carry out shaping compacting, drying, sintering and insulation successively by after all raw material mixing, can obtain AZC brick, wherein, the temperature of sintering is 1630 DEG C, and the time of sintering is 58h, and the time of insulation is 5h.
(3) Performance Detection
Through surveying, the apparent porosity of this fragment of brick is 16%, and volume density is 3.19g/cm
3, cold crushing strength is 80MPa, 0.2MPa refractoriness under load is 1700 DEG C.
Claims (8)
1. refinery coke float glass process regenerator AZC checker brick, is characterized in that comprising following component by weight percentage: aluminum oxide 70-75%; Zirconium dioxide 7-12%; Chromium sesquioxide 6-10%; Aluminum phosphate 9-12%; Wherein, described chromium sesquioxide is formed by waste material chromium sesquioxide double sintering, and its particle size is more than 6000 orders.
2. refinery coke float glass process regenerator AZC checker brick according to claim 1, is characterized in that: the temperature of described double sintering is 1800-2000 DEG C, and the time is 2-6h.
3. refinery coke float glass process regenerator AZC checker brick according to claim 1, is characterized in that: the purity of described aluminum oxide is more than 99.9%, and its particle size is more than 6000 orders; The purity of described zirconium dioxide is more than 99.9%; The purity of described chromium sesquioxide is more than 80.0%.
4. refinery coke float glass process regenerator AZC checker brick according to claim 1, is characterized in that: also comprising weight percent is 2.5-5% carboxymethyl cellulose.
5. the refinery coke float glass process regenerator AZC checker brick according to claim 1 or 4, is characterized in that: also comprise the rare earth B nucleator that weight percent is 0.3-3%.
6. the refinery coke float glass process regenerator preparation method of AZC checker brick according to claim 1, is characterized in that comprising the steps: to carry out shaping compacting, drying, sintering and insulation successively by after described raw material mixing, obtains described AZC checker brick.
7. the refinery coke float glass process regenerator preparation method of AZC checker brick according to claim 6, it is characterized in that: the temperature of described sintering is 1550-1650 DEG C, the time of sintering is 48-60h, and the time of insulation is 4-6h.
8. the regenerator utilizing AZC checker brick described in claim 1 to arrange, it is characterized in that the inner fragment of brick of this regenerator being distributed as from bottom to top: 1-19 layer is sillimanite, 20-59 layer is AZS-33 zircon corundum brick, and 60-70 layer is AZC checker brick, and 71-72 layer is 70Z zirconia block.
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| CN201510074104.1A CN104692628B (en) | 2015-02-11 | 2015-02-11 | A kind of AZC checker brick and its preparation method and the regenerative chamber using checker brick arrangement |
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| CN201510074104.1A CN104692628B (en) | 2015-02-11 | 2015-02-11 | A kind of AZC checker brick and its preparation method and the regenerative chamber using checker brick arrangement |
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| CN104692628B CN104692628B (en) | 2018-05-22 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111646810A (en) * | 2020-05-29 | 2020-09-11 | 郑州安耐克实业有限公司 | High-strength high-aluminum grid brick for hot blast stove and preparation process thereof |
| CN112225543A (en) * | 2020-10-12 | 2021-01-15 | 郑州方铭高温陶瓷新材料有限公司 | Fusion-cast formed cylindrical ceramic tile applied to glass kiln regenerator and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1271705A (en) * | 1999-04-28 | 2000-11-01 | 淄博市淄川冶金建筑材料厂 | Technology for making antiwear high-aluminium brick integrating aluminium phosphate |
| CN101792323A (en) * | 2010-03-17 | 2010-08-04 | 赵大兴 | Aluminum-chromium-zirconium composite air bricks and manufacturing method thereof |
-
2015
- 2015-02-11 CN CN201510074104.1A patent/CN104692628B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1271705A (en) * | 1999-04-28 | 2000-11-01 | 淄博市淄川冶金建筑材料厂 | Technology for making antiwear high-aluminium brick integrating aluminium phosphate |
| CN101792323A (en) * | 2010-03-17 | 2010-08-04 | 赵大兴 | Aluminum-chromium-zirconium composite air bricks and manufacturing method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111646810A (en) * | 2020-05-29 | 2020-09-11 | 郑州安耐克实业有限公司 | High-strength high-aluminum grid brick for hot blast stove and preparation process thereof |
| CN112225543A (en) * | 2020-10-12 | 2021-01-15 | 郑州方铭高温陶瓷新材料有限公司 | Fusion-cast formed cylindrical ceramic tile applied to glass kiln regenerator and preparation method thereof |
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| CN104692628B (en) | 2018-05-22 |
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