CN108002816A - Anticorrosive refractory brick and preparation method thereof - Google Patents
Anticorrosive refractory brick and preparation method thereof Download PDFInfo
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- CN108002816A CN108002816A CN201610958624.3A CN201610958624A CN108002816A CN 108002816 A CN108002816 A CN 108002816A CN 201610958624 A CN201610958624 A CN 201610958624A CN 108002816 A CN108002816 A CN 108002816A
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- refractory brick
- anticorrosive
- anticorrosive refractory
- little particle
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- 239000011449 brick Substances 0.000 title claims abstract description 47
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 239000000843 powder Substances 0.000 claims abstract description 42
- 239000002245 particle Substances 0.000 claims abstract description 26
- 239000002994 raw material Substances 0.000 claims abstract description 20
- 239000010431 corundum Substances 0.000 claims abstract description 19
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 19
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910052863 mullite Inorganic materials 0.000 claims abstract description 19
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 claims abstract description 18
- QDOXWKRWXJOMAK-UHFFFAOYSA-N dichromium trioxide Chemical compound O=[Cr]O[Cr]=O QDOXWKRWXJOMAK-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000011029 spinel Substances 0.000 claims abstract description 18
- 229910052596 spinel Inorganic materials 0.000 claims abstract description 18
- -1 Magnesium aluminate Chemical class 0.000 claims abstract description 17
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 17
- 239000011777 magnesium Substances 0.000 claims abstract description 17
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000003595 mist Substances 0.000 claims abstract description 13
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910002012 Aerosil® Inorganic materials 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims description 10
- 238000001354 calcination Methods 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 2
- 241000790917 Dioxys <bee> Species 0.000 claims 1
- 229910003978 SiClx Inorganic materials 0.000 claims 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 claims 1
- 229910000423 chromium oxide Inorganic materials 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract description 3
- 238000005260 corrosion Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 description 5
- 238000005245 sintering Methods 0.000 description 5
- 239000004927 clay Substances 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 239000011819 refractory material Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 229910052906 cristobalite Inorganic materials 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
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- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/08—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding porous substances
- C04B38/085—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding porous substances of micro- or nanosize
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/03—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite
- C04B35/04—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite based on magnesium oxide
- C04B35/043—Refractories from grain sized mixtures
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
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- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
- C04B2235/3222—Aluminates other than alumino-silicates, e.g. spinel (MgAl2O4)
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- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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Abstract
The present invention provides a kind of anticorrosive refractory brick, it includes the raw material of following mass percents：Magnesium aluminate spinel bulky grain 20%~30%, mullite little particle 12%~24%, gangue little particle 15%~27%, calcium aluminate fine powder 11%~28%, chrome oxide green micro mist 9%~17%, corundum powder 10%~18%, silica sol 1.6%~3.8%, aerosil 3%~5%, surplus are pulp-water.The anticorrosive refractory brick component collocation is reasonable and has higher corrosion resistance, good dimensional stability and higher refractoriness under load.The present invention also provides a kind of preparation method of above-mentioned anticorrosive refractory brick, this method step is simple, is easy to industrialized production.
Description
Technical field
The invention belongs to technical field of refractory materials, specifically, relate to a kind of anticorrosive refractory brick and its preparation side
Method.
Background technology
Refractory material is due to the corrosion resistance good to high-temperature medium, and the performance with insulation, it is metallurgical,
The high temperature industry such as petrochemical industry, glass is widely used.As energy-saving attention degree is continuously improved in China, there is good protect
The lightweight refracrory of warm heat insulation has obtained more research and developments.Unshape refractory due to construction just
Profit, production cost are low, and the advantage such as overall structure is good of liner body, and receive special attention, wherein being poured especially with fire resisting
Material feeding is applied the most extensive.
Existing refractory brick is mostly cement insulating fire brick, clay brick mainly by mullite, glass phase and cristobalite and
Quartz is formed.Usually using hard paste as raw material, advance mature calcined material, is then equipped with mild-clay, with semidry method or can
Modeling method is molded, and temperature burns till clay tile product at 1300 DEG C~1400 DEG C, can add the bonding agent systems such as a small amount of waterglass, cement
Into not burned product and unsetting material.Also this refractory brick service life is short, non-reusable.Further, since traditional is resistance to
Pore size is larger in fiery aggregate, and aperture is in grade more, so when the material in hot environment in use, due to passing through
The aggravation of gas radiation heat transfer and convection current heat transfer, can raise the thermal conductivity factor of refractory material, thereby reduce fire resisting in stomata
The heat insulation and preservation effect of material, increases the loss of thermal energy, causes the rising of energy cost.
In order to solve the problems, such as present on, people are seeking a kind of preferable technical solution always.
The content of the invention
The purpose of the present invention is in view of the deficiencies of the prior art, thus provide it is a kind of have higher refractoriness under load,
Anticorrosive refractory brick of higher corrosion resistance and preparation method thereof.
To achieve these goals, the technical solution adopted in the present invention is：A kind of anticorrosive refractory brick, it includes following
The raw material of mass percent：Magnesium aluminate spinel bulky grain 20%~30%, mullite little particle 12%~24%, gangue little particle
15%~27%, calcium aluminate fine powder 11%~28%, chrome oxide green micro mist 9%~17%, corundum powder 10%~18%, silica sol
1.6%~3.8%, aerosil 3%~5%, surplus are pulp-water.
Based on above-mentioned, the anticorrosive refractory brick it include the raw materials of following mass percents：Magnesium aluminate spinel bulky grain
21%~28%, mullite little particle 12%~22%, gangue little particle 16%~23%, calcium aluminate fine powder 12.5%~21%, oxidation
Chrome green micro mist 10%~16%, corundum powder 11.5%~16.5%, silica sol 2%~2.8%, aerosil 4%~
5%th, surplus is pulp-water.
Based on above-mentioned, the granularity of the magnesium aluminate spinel bulky grain is the mm of 1 mm~3；The short grained grain of mullite
Spend for the mm of 0 mm~1；The short grained granularity of gangue is the mm of 0 mm~1.
Based on above-mentioned, the granularity of the calcium aluminate fine powder is less than 0.074 mm.
Based on above-mentioned, the granularity of the corundum powder is less than 0.043 mm, the chrome oxide green powder size is less than 0.043
mm。
The present invention also provides a kind of preparation method of anticorrosive refractory brick, comprise the following steps：
（1）Calculated according to the raw material of above-mentioned mass percent, magnesium aluminate spinel bulky grain, mullite little particle, gangue is small
Particle, calcium aluminate fine powder and pulp-water carry out mixed grind and prefabricated pug are made；Then chrome oxide green is added into the prefabricated pug
Micro mist, corundum powder, silica sol and aerosil simultaneously carry out mixed grind mixed grind pug are made；
（2）The mixed grind pug is pressed into adobe, the anticorrosive refractory brick is made in the adobe after drying and calcining.
Based on above-mentioned, the step（2）Including：The mixed grind pug is pressed into by brick using the pressure of 50MPa~80MPa
Base, and by the adobe spontaneously dry 24 it is small when be placed in dry kiln at a temperature of 100 DEG C~200 DEG C it is dry 24 it is small when~
48 it is small when；Then by the dried adobe carried out at a temperature of 1100 DEG C~1350 DEG C calcining 10 it is small when~24 it is small when,
So as to which the anticorrosive refractory brick be made.
The present invention has prominent substantive distinguishing features and significant progress compared with the prior art, and specifically, the present invention carries
Supply the anticorrosive refractory brick using magnesium aluminate spinel bulky grain as skeleton raw material, with mullite little particle, gangue little particle,
Calcium aluminate fine powder, chrome oxide green micro mist and corundum powder are auxiliary material, under the action of silica sol and aerosil,
Filling of the above-mentioned auxiliary material in the skeleton raw material is realized so as to which the mixed grind pug be made.It is pressed into by the mixed grind pug
Adobe, because raw material includes the calcium aluminate fine powder with loose structure, can cause in the adobe in high-temperature sintering process
Portion produces a large amount of Minute pores in a short time, and the Minute pores will not with the progress of sintering process agglomeration, most
Form micron order and equally distributed stomata in the product eventually.At the same time in high-temperature sintering process, due to the coal in auxiliary material
Spoil little particle can react generation with the chrome oxide green micro mist has stronger erosion-resisting characteristics spinel substances, reaction production
The volume contraction phase offset that raw volumetric expansion can be produced with the skeleton raw material in high-temperature sintering process, therefore, by institute
The reasonably combined of anticorrosive refractory brick raw material is stated, so as to ensure that the anticorrosive refractory brick has good dimensional stability.
On the other hand, in the adobe high-temperature sintering process, the corundum powder can be formed by reaction in-situ to be contained
SiO2High viscosity compacted zone, and with the corundum powder can also to generate like fibrous toughened and reinforced for the gangue little particle
The needle-shaped or rod-like mullite whisker of effect, the mullite crystal whisker is to improving the mechanical property of the anticorrosive refractory brick very
Favorably, not only improve the high temperature strength of the anticorrosive refractory brick but also reduce its firing temperature.Therefore, it is described anticorrosive resistance to
Firebrick has higher surface erosion resistance and higher refractoriness under load.
The present invention also provides a kind of preparation method of above-mentioned anticorrosive refractory brick, it is mixed by the way that above-mentioned raw materials are mixed to form
Pug is ground, the adobe, is then sintered so as to be made by the repressed formation adobe of mixed grind pug under the high temperature conditions
The anticorrosive refractory brick, this method step is simple, is easy to industrialized production.
Embodiment
Below by embodiment, technical scheme is described in further detail.
Embodiment 1
The present embodiment provides a kind of anticorrosive refractory brick, it includes the raw material of following mass percents：Magnesium aluminate spinel bulky grain
27%th, mullite little particle 12%, gangue little particle 15%, calcium aluminate fine powder 17%, chrome oxide green micro mist 9%, corundum powder 10%,
Silica sol 2%, aerosil 3%, pulp-water 5%.
Wherein, the granularity of the magnesium aluminate spinel bulky grain is the mm of 1 mm~3；The short grained granularity of mullite is 0
The mm of mm~1；The short grained granularity of gangue is the mm of 0 mm~1；The granularity of the calcium aluminate fine powder is less than 0.074 mm；
The granularity of the corundum powder is less than 0.043 mm；The chrome oxide green powder size is less than 0.043 mm.Change in each raw material
Study point as shown in table 1.
Table 1, each raw material main chemical compositions
The present embodiment also provides a kind of preparation method of the anticorrosive refractory brick, and specific preparation process includes：
（1）Calculated according to the raw material of above-mentioned mass percent, magnesium aluminate spinel bulky grain, mullite little particle, gangue is small
Particle, calcium aluminate fine powder and pulp-water carry out mixed grind and prefabricated pug are made；Then chrome oxide green is added into the prefabricated pug
Micro mist, corundum powder, silica sol and aerosil simultaneously carry out mixed grind mixed grind pug are made；
（2）The mixed grind pug is pressed into by adobe using pressure of the brickmaking machine in 80 MPa, and by the adobe naturally dry
It is dry 24 it is small when be placed in dry kiln, under 200 DEG C of temperature conditionss it is dry 24 it is small when；Then the dried adobe is existed
Carried out at a temperature of 1350 DEG C calcining 12 it is small when so that be made the anticorrosive refractory brick.
Embodiment 2
The present embodiment provides a kind of anticorrosive refractory brick, it includes the raw material of following mass percents：Magnesium aluminate spinel bulky grain
20%th, mullite little particle 12%, gangue little particle 15%, calcium aluminate fine powder 12%, chrome oxide green micro mist 11%, corundum powder
18%th, silica sol 3%, aerosil 5%, pulp-water 4%.
Wherein, the granularity of the magnesium aluminate spinel bulky grain is the mm of 1 mm~3；The short grained granularity of mullite is 0
The mm of mm~1；The short grained granularity of gangue is the mm of 0 mm~1；The granularity of the calcium aluminate fine powder is less than 0.074 mm；
The granularity of the corundum powder is less than 0.043 mm；The chrome oxide green powder size is less than 0.043 mm.
The preparation method of anticorrosive refractory brick described in the present embodiment is roughly the same with the preparation method in embodiment 1, no
It is with part：
The step（2）The mixed grind pug is pressed into by adobe using pressure of the brickmaking machine in 70 MPa, the adobe passes through certainly
Be subsequently placed in when so dry 24 is small in dry kiln, at a temperature of 200 DEG C it is dry 24 it is small when after the dried adobe existed
Carried out at a temperature of 1300 DEG C calcining 24 it is small when so that be made the anticorrosive refractory brick.
Embodiment 3
The present embodiment provides a kind of anticorrosive refractory brick, it includes the raw material of following mass percents：Magnesium aluminate spinel bulky grain
21%th, mullite little particle 12%, gangue little particle 16%, calcium aluminate fine powder 12%, chrome oxide green micro mist 12.5%, corundum powder
12%th, silica sol 3%, aerosil 5%, pulp-water 6.5%.
Wherein, the granularity of the magnesium aluminate spinel bulky grain is the mm of 1 mm~3；The short grained granularity of mullite is 0
The mm of mm~1；The short grained granularity of gangue is the mm of 0 mm~1；The granularity of the calcium aluminate fine powder is less than 0.074 mm；
The granularity of the corundum powder is less than 0.043 mm；The chrome oxide green powder size is less than 0.043 mm.
The preparation method of anticorrosive refractory brick described in the present embodiment is identical with the preparation method in embodiment 1.
Anticorrosive refractory brick performance detection
The resistance to pressure of Air permenbility, bulk density, refractoriness, room temperature of the anticorrosive refractory brick prepared respectively to embodiment 1~3
Degree and 1350 DEG C of high temperature break resistant intensity performances are detected, and testing result is as shown in table 2, and wherein air permeability test condition is：It is resistance to
Firebrick area 2 × 10-3m2, gas pressure 0.3MPa.
Table 2, anticorrosive refractory brick performance detection
As can be seen from the above table：The fire resisting softening point for the anticorrosive refractory brick that embodiment 1~3 provides is more than 1650 DEG C, room temperature
Compressive resistance is more than 120MPa, flexural strength is more than 20MPa, bulk density is more than 3.0g/cm3, Air permenbility be less than 0.8m3/ h, because
This described anticorrosive refractory brick property indices meets GB/T3994-2013 set quotas, while the product is with higher
Surface erosion resistance and the advantages of higher refractoriness under load.
Finally it should be noted that：The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof；To the greatest extent
The present invention is described in detail with reference to preferred embodiments for pipe, those of ordinary skills in the art should understand that：Still
It can modify to the embodiment of the present invention or equivalent substitution is carried out to some technical characteristics；Without departing from this hair
The spirit of bright technical solution, it should all cover among the claimed technical solution scope of the present invention.
Claims (8)
1. a kind of anticorrosive refractory brick, it is characterised in that it includes the raw material of following mass percents：Magnesium aluminate spinel bulky grain
20%~30%, mullite little particle 12%~24%, gangue little particle 15%~27%, calcium aluminate fine powder 11%~28%, chromium oxide
Green micro mist 9%~17%, corundum powder 10%~18%, silica sol 1.6%~3.8%, aerosil 3%~5%, surplus
For pulp-water.
2. anticorrosive refractory brick according to claim 1, it is characterised in that it includes the raw material of following mass percents：
Magnesium aluminate spinel bulky grain 21%~28%, mullite little particle 12%~22%, gangue little particle 16%~23%, calcium aluminate fine powder
12.5%~21%, chrome oxide green micro mist 10%~16%, corundum powder 11.5%~16.5%, silica sol 2%~2.8%, dioxy
SiClx aeroge 4%~5%, surplus are pulp-water.
3. anticorrosive refractory brick according to claim 1 or 2, it is characterised in that the grain of the magnesium aluminate spinel bulky grain
Spend for the mm of 1 mm~3.
4. anticorrosive refractory brick according to claim 3, it is characterised in that the short grained granularity of mullite is 0 mm
~1 mm；The short grained granularity of gangue is the mm of 0 mm~1.
5. anticorrosive refractory brick according to claim 4, it is characterised in that the granularity of the calcium aluminate fine powder is less than
0.074 mm。
6. anticorrosive refractory brick according to claim 5, it is characterised in that the granularity of the corundum powder is less than 0.043
Mm, the chrome oxide green powder size are less than 0.043 mm.
7. a kind of preparation method of anticorrosive refractory brick, comprises the following steps：
（1）Raw material according to any one of claim 1~6 mass percent calculates, by magnesium aluminate spinel bulky grain, Mo Lai
Stone little particle, gangue little particle, calcium aluminate fine powder and pulp-water carry out mixed grind and prefabricated pug are made；Then to the prefabricated mud
Chrome oxide green micro mist, corundum powder, silica sol and aerosil are added in material and carries out mixed grind mixed grind mud is made
Material；
（2）The mixed grind pug is pressed into adobe, the anticorrosive refractory brick is made in the adobe after drying and calcining.
8. the preparation method of anticorrosive refractory brick according to claim 7, it is characterised in that the step（2）Including：Adopt
The mixed grind pug is pressed into adobe with the pressure of 50MPa~80MPa, and by the adobe spontaneously dry 24 it is small when be placed on
In dry kiln at a temperature of 100 DEG C~200 DEG C it is dry 20 it is small when~48 it is small when；Then by the dried adobe 1100
DEG C~1350 DEG C at a temperature of carry out calcining 10 it is small when~24 it is small when so that be made the anticorrosive refractory brick.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108191418A (en) * | 2018-03-02 | 2018-06-22 | 合肥铭佑高温技术有限公司 | A kind of corrosion-resistant thermal insulation fire-resistant brick of glass furnace |
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