CN106278299A - Andalusite composite refractory brick and its preparation method and application - Google Patents
Andalusite composite refractory brick and its preparation method and application Download PDFInfo
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- CN106278299A CN106278299A CN201610577322.1A CN201610577322A CN106278299A CN 106278299 A CN106278299 A CN 106278299A CN 201610577322 A CN201610577322 A CN 201610577322A CN 106278299 A CN106278299 A CN 106278299A
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Abstract
The present invention provides a kind of andalusite composite refractory brick, including major ingredient and additive, described major ingredient includes the raw material of following mass percent: bauxite bulky grain 5%～10%, andalusite bulky grain 10%～20%, mullite bulky grain 14%～20%, the little granule of andalusite 14%～30%, andalusite fine powder 15%～35%, Kaolin micropowder 5%～10%, silicon powder 2%～5%；The quality of described additive is the 4.5%～5.5% of described major ingredient quality.The present invention also provides for the preparation method and application of a kind of above-mentioned andalusite composite refractory brick.The collocation of described andalusite composite refractory brick composition rationally and has good thermal shock resistance, preferable heat stability and higher refractoriness under load, thus improves the carbon baking furnace service life applying described andalusite composite fire brick masonry flue wall.
Description
Technical field
The invention belongs to technical field of refractory materials, specifically, relate to a kind of andalusite composite refractory brick and system thereof
Preparation Method and application.
Background technology
In modern carbon element industry, producing anode block with roaster the most universal, the main of carbon baking furnace is appointed
Business is roasting electrolytic aluminum anode carbon block.The baking furnace flame path wall of prior art is built by laying bricks or stones by clay brick and is formed, and fuel is in quirk
Burn, and transferred heat to the anode block closing in hopper by top load andalusite composite fire brick, sun
The roasting in the atmosphere not contacting flame of pole carbon block.So, refractory material in anode-baking furnace except to stand long-term height
Outside temperature, high pressure, still suffering from periodic variations in temperature, therefore, the requirement to refractory material is that high temperature creep rate is low, and loading is soft
Change temperature thermal shock resistance high, reasonable.
And on the market that China is current, although Refractory material for carbon furnace produces the most universal, but, no matter
Be fireclay refractory or high alumina refractories or general creep refractory material all to there is load softening point the highest, hot
The shortcomings such as shake poor stability, long-time use creep rate are big, can cause the appearance deformation that flue wall is too early, damage, anode block
Production is greatly affected.
In order to solve with present on problem, people are seeking a kind of preferably technical solution always.
Summary of the invention
It is an object of the invention to for the deficiencies in the prior art, thus provide a kind of and there is higher thermal shock resistance, higher
The andalusite composite refractory brick of refractoriness under load and preferable heat stability.
To achieve these goals, the technical solution adopted in the present invention is: a kind of andalusite composite refractory brick, including main
Material and additive, described major ingredient includes the raw material of following mass percent: bauxite bulky grain 5%～10%, andalusite are big
Granule 10%～20%, mullite bulky grain 14%～20%, the little granule of andalusite 14%～30%, andalusite fine powder 15%～35%, height
Ridge soil micropowder 5%～10%, silicon powder 2%～5%；The quality of described additive is the 4.5%～5.5% of described major ingredient quality.
Based on above-mentioned, described major ingredient includes the raw material of following mass percent: bauxite bulky grain 5%, andalusite are big
Granule 10%, mullite bulky grain 17%, the little granule of andalusite 27%, andalusite fine powder 34%, Kaolin micropowder 5%, silicon powder 2%.
Based on above-mentioned, the oarse-grained granularity of described bauxite is 1 mm～3 mm；The oarse-grained grain of described mullite
Degree is 1 mm～3 mm.The oarse-grained granularity of described andalusite is 1 mm～3 mm；
Based on above-mentioned, the short grained granularity of described andalusite is less than 1 mm.
Based on above-mentioned, the granularity of described andalusite fine powder is less than less than 0.074 mm, the granularity of described Kaolin micropowder
0.043 mm, the granularity of described silicon powder are less than 2 microns.
Based on above-mentioned, described additive is pulp-water.
Wherein, described major ingredient includes aggregate and fines, and described andalusite composite refractory brick is with the bauxite in raw material
Bulky grain, andalusite bulky grain, the little granule of andalusite, mullite bulky grain are aggregate, with andalusite fine powder, Kaolin micropowder,
Silicon powder is fines, is mixed by described additive.
The present invention also provides for the preparation method of a kind of described andalusite composite refractory brick, comprises the following steps:
(1) calculate according to above-mentioned mass percent, by bauxite bulky grain, andalusite bulky grain, mullite bulky grain, red
The little granule of pillar and additive carry out mixed grind and prepare prefabricated pug；Then in described prefabricated pug, add andalusite fine powder, height
Ridge soil micropowder, silicon powder also carry out mixed grind and prepare mixed grind pug；
(2) described mixed grind pug is pressed into adobe, after the calcining of described adobe drying, prepares described andalusite composite refractory brick.
Based on above-mentioned, described step (2) including: described mixed grind pug is pressed into adobe, by described adobe in temperature is
24 hours time～36 hours it is dried under the conditions of 60 DEG C～130 DEG C；Then by dried described adobe at 1450 DEG C～
Carry out at a temperature of 1480 DEG C calcining 10 hours～24 hours, thus prepare described andalusite composite refractory brick.
The present invention also provides for the application of a kind of above-mentioned andalusite composite refractory brick, and described andalusite composite refractory brick is applied to
In carbon baking furnace.
In andalusite composite refractory brick raw material provided by the present invention, the performance effect of each composition is as follows:
Andalusite: crystal belongs to the nesosilicate mineral of orthogonal (tiltedly side) crystallographic system, andalusite meeting in adobe calcination process
Occur irreversible crystal transformation to form the mullite with good mullite network, thus make it have more than 1800 DEG C
Fire resistance, and resistance to suddenly cold and hot, mechanical strength are big, heat shock resistance power and resistance to slag is strong, loading inversion point is high, and have high
Chemical stability and extremely strong resistance to chemical corrosion so that preparation described andalusite composite refractory brick there is Gao He
Creep soft, low, high thermal shock stability.
Kaolin: Kaolin belongs to 1:1 type phyllosilicate, crystal is mainly by silicon-oxy tetrahedron and aluminum hydrogen-oxygen octahedron group
Become, there is strong acid resistance and the flashback performance more than 1700 DEG C thus add described the anti-of andalusite composite refractory brick and forge
Burning property, Kaolin is combined the pug formed and has higher plasticity with water so that the described adobe of preparation has preferably one-tenth
Type.
Bauxite: referring to bauxite mineral material after calcining, it is mainly composed of diaspore and high alumina silicon
Stone, has higher flashback performance, is commonly used to prepare various high-alumina brick, is that metallurgical industry is widely used fire-resistant with other industry
Or anti-corrosion material.
Mullite: be a series of aluminosilicate composition mineral be referred to as, have high temperature resistant, intensity high thermal conductivity coefficient is little, joint
The features such as energy effect is notable, it is adaptable to oil splits Jie's stove, metallurgical air stove, ceramic roller kiln, tunnel cave, electroceramics shuttle kiln, glass
Glass pot furnace and the liner of various electric furnace, can directly contact flame.
Silicon powder: silicon powder is through broken, ball milling, flotation, pickling purification, high purity water by natural quartz or vitreous silica
The micropowder of the multiple tracks processes such as reason；It it is a kind of Inorganic Non-metallic Materials nontoxic, tasteless, free of contamination.It has heatproof
Property the excellent performances such as good, acid-alkali-corrosive-resisting, poor thermal conductivity, high insulation, low bulk, stable chemical performance, hardness is big.Silicon powder
It is difficult to and other substance reactions, with major part acid, alkali not chemically reactive bulky grain grating rationally, can reduce and eliminate during use
Precipitation, lamination；The tension of solidfied material, comprcssive strength can be made to strengthen, and anti-wear performance improves, and can increase the heat conduction of solidfied material
Coefficient, increases fire resistance.Silicon powder can fill the hole between andalusite composite refractory brick raw material bulky grain, simultaneously and aquation
Product generates gelinite, can significantly improve the resistance to compression of andalusite composite refractory brick, anti-folding, impervious, anticorrosion, shock resistance, wearability
Energy and compactness.And and Al2O3Sending out and should generate mullite phase, make the elevated temperature strength of andalusite composite refractory brick, shaking property of heat resistanceheat resistant increases
By force.
Hinge structure of the present invention has prominent substantive distinguishing features and significantly progress, and specifically, the present invention will
Varigrained bauxite, andalusite, mullite, Kaolin, silicon powder and additive mix so that the brick of preparation
The collocation of each site component proportioning of base is consistent, it is ensured that andalusite composite refractory brick each position performance of calcining gained consistent
Property, simultaneously containing the granularity material that a large amount of corner angle are prominent in raw material, increase critical granularity, provide for andalusite composite refractory brick
Firm framing structure makes it in use be not likely to produce deformation.Meanwhile, bauxite, mullite, height it are utilized respectively
Ridge soil, the resistance to burning characteristic of silicon powder and preferably mouldability and andalusite have heat shock resistance power what calcination process was formed, resist
The mullite that slag is strong, loading inversion point is high so that the andalusite composite refractory brick of preparation has high RUL, low creep, high anti-
Thermal shock performance, thus improve the carbon baking furnace service life applying described andalusite composite fire brick masonry flue wall.And
The raw material that the method uses is easy to get, composition collocation is reasonable, and preparation process is simple.
Detailed description of the invention
Below by detailed description of the invention, technical scheme is described in further detail.
Embodiment 1
The present embodiment provides a kind of andalusite composite refractory brick, and it includes aggregate, fines and pulp-water, wherein, described pulp-water
Quality be described aggregate and the 4.5% of described fines gross mass.Former by following mass percent of described aggregate and described fines
Material composition: bauxite bulky grain 5%, andalusite bulky grain 10%, mullite bulky grain 17%, the little granule of andalusite 27%, red
Pillar fine powder 34%, Kaolin micropowder 5%, silicon powder 2%.
Wherein, the oarse-grained granularity of described bauxite is 1 mm～3 mm, the oarse-grained granularity of described mullite are 1
Mm～3 mm, the oarse-grained granularity of described andalusite is 1 mm～3 mm, the short grained granularity of described andalusite are less than 1 mm, institute
The granularity stating andalusite fine powder is less than 0.074 mm, the granularity of described Kaolin micropowder is less than 0.043mm, the grain of described silicon powder
Degree is less than 2 microns.Chemical composition in each raw material is as shown in table 1.
Table 1, each raw material main chemical compositions
The present embodiment also provides for the preparation method of a kind of described andalusite composite refractory brick, and concrete preparation process includes:
Respectively andalusite, bauxite, flint clay, Kaolin, mullite are pulverized, prepare the raw material of above-mentioned granularity.
By big to the described bauxite bulky grain of above-mentioned mass percent, described andalusite bulky grain, described mullite
Granule, the little granule of described andalusite and described pulp-water carry out mixed grind and prepare prefabricated pug in 5 minutes；Then to described prefabricated pug
The described andalusite fine powder of the above-mentioned mass percent of middle addition, described Kaolin micropowder and described silicon powder also carry out mixed grind 20 points
Clock, prepares mixed grind pug.
The pressure tonnage brickmaking machine more than 315 tons is used described mixed grind pug to be pressed into adobe, then by described adobe
Putting into and be dried in tunnel type drying hole 24 hours, the inlet temperature wherein controlling described tunnel type drying hole is 60 DEG C, goes out
Mouth temperature is 130 DEG C；It is little by dried described adobe loading fuel gas tunnel kiln carries out calcining 12 at a temperature of 1480 DEG C
Time, thus prepare described andalusite composite refractory brick.After testing, the described andalusite composite refractory brick density that the present embodiment prepares
It is 2.46 g/cm3。
Andalusite composite refractory brick prepared by the preparation method provided by the present embodiment, can be applicable to build carbon baking furnace by laying bricks or stones
Flue wall.
Embodiment 2
The present embodiment provides a kind of andalusite composite refractory brick, and concrete material composition is roughly the same with embodiment 1, and difference exists
In, in the present embodiment, the quality of described pulp-water is described aggregate and the 5.5% of described fines gross mass, described aggregate and described
Fines includes the raw material of following mass percent: bauxite bulky grain 5%, andalusite bulky grain 10%, mullite bulky grain
17%, the little granule of andalusite 29%, andalusite fine powder 32%, Kaolin micropowder 5%, silicon powder 2%.
The preparation method of the andalusite composite refractory brick described in the present embodiment and the substantially phase of the preparation method in embodiment 1
With, difference is: described mixed grind pug is pressed into adobe, then described adobe is put in tunnel type drying hole and carries out
Be dried 36 hours, wherein control the inlet temperature of described tunnel type drying hole be 60 DEG C, outlet temperature be 130 DEG C；Will be dried
Described adobe load in fuel gas tunnel kiln and carry out calcining 10 hours at a temperature of 1470 DEG C；Thus it is multiple to prepare described andalusite
Close refractory brick.After testing, the described andalusite composite refractory brick density that the present embodiment prepares is 2.49 g/cm3。
Andalusite composite refractory brick prepared by the preparation method provided by the present embodiment, can be applicable to build carbon baking furnace by laying bricks or stones
Flue wall.
Embodiment 3
The present embodiment provides a kind of andalusite composite refractory brick, and concrete material composition is roughly the same with embodiment 1, and difference exists
In, in the present embodiment, the quality of described pulp-water is described aggregate and the 5.5% of described fines gross mass, described aggregate and described
Fines includes the raw material of following mass percent: bauxite bulky grain 8%, andalusite bulky grain 10%, mullite bulky grain
14%, the little granule of andalusite 28%, andalusite fine powder 30%, Kaolin micropowder 6%, silicon powder 4%.
The preparation method of the andalusite composite refractory brick described in the present embodiment and the substantially phase of the preparation method in embodiment 1
With, difference is: described mixed grind pug is pressed into adobe, then described adobe is put in tunnel type drying hole and carries out
Be dried 26 hours, wherein control the inlet temperature of described tunnel type drying hole be 60 DEG C, outlet temperature be 130 DEG C；Then will be dry
Adobe after dry carries out calcining 20 hours at a temperature of 1450 DEG C thus prepares described andalusite composite refractory brick.After testing,
The described andalusite composite refractory brick density that the present embodiment prepares is 2.47 g/cm3。
Andalusite composite refractory brick prepared by the preparation method provided by the present embodiment, can be applicable to build carbon baking furnace by laying bricks or stones
Flue wall.
Andalusite composite refractory brick performance detects: respectively in the andalusite composite refractory brick to embodiment 1～3 preparation
Al2O3、Fe2O3Content, apparent porosity, cold crushing strength and 1350 DEG C of high temperature break resistant intensity performances detect, and
0.2MPa pressure, 1280 DEG C of calcinings creep rate of 25 hours and 50 hours detect, and testing result is as shown in table 2.
Table 2, andalusite composite refractory brick performance detect
As can be seen from the above table: the softening point of the andalusite composite refractory brick that embodiment 1～3 provides is more than 1600 DEG C, room temperature
Compressive resistance more than 75MPa, creep rate absolute value less than 0.4%, apparent porosity between 15%～16.2%, coefficient of thermal expansion little
In 0.7%, the most described andalusite composite refractory brick property indices meets GB/T3994-2013 set quota, described red
Pillar composite refractory brick has the high and low creep of load softening temperature, the performance of highly heatproof and shockproof, can apply to build carbon baking furnace by laying bricks or stones
Flue wall carrys out baked for producing anode block.
Finally should be noted that: above example is only in order to illustrate that technical scheme is not intended to limit；To the greatest extent
The present invention has been described in detail by pipe with reference to preferred embodiment, and those of ordinary skill in the field are it is understood that still
The detailed description of the invention of the present invention can be modified or portion of techniques feature is carried out equivalent；Without deviating from this
The spirit of bright technical scheme, it all should be contained in the middle of the technical scheme scope that the present invention is claimed.
Claims (9)
1. an andalusite composite refractory brick, including major ingredient and additive, it is characterised in that described major ingredient includes following quality hundred
The raw material of mark: bauxite bulky grain 5%～10%, andalusite bulky grain 10%～20%, mullite bulky grain 14%～20%,
The little granule of andalusite 14%～30%, andalusite fine powder 15%～35%, Kaolin micropowder 5%～10%, silicon powder 2%～5%；Described add
Add quality is described major ingredient quality the 4.5%～5.5% of agent.
Andalusite composite refractory brick the most according to claim 1, it is characterised in that described major ingredient includes following percent mass
Number raw material: bauxite bulky grain 5%, andalusite bulky grain 10%, mullite bulky grain 17%, the little granule of andalusite 27%,
Andalusite fine powder 34%, Kaolin micropowder 5%, silicon powder 2%.
Andalusite composite refractory brick the most according to claim 1 and 2, it is characterised in that described bauxite bulky grain
Granularity be 1 mm～3 mm；The oarse-grained granularity of described mullite is 1 mm～3 mm, the oarse-grained granularity of described andalusite
It is 1 mm～3 mm.
Andalusite composite refractory brick the most according to claim 3, it is characterised in that the short grained granularity of described andalusite is little
In 1 mm.
Andalusite composite refractory brick the most according to claim 4, it is characterised in that the granularity of described andalusite fine powder is less than
0.074 mm, the granularity of described Kaolin micropowder are less than 0.043mm, the granularity of described silicon powder is less than 2 microns.
Andalusite composite refractory brick the most according to claim 5, it is characterised in that described additive is pulp-water.
7. a preparation method for described andalusite composite refractory brick, comprises the following steps:
(1) calculate according to the andalusite composite refractory brick raw materials quality percent described in any one of claim 1～6, by aluminum vitriol
Soil grog bulky grain, andalusite bulky grain, mullite bulky grain, the little granule of andalusite and additive carry out mixed grind and prepare prefabricated mud
Material；Then in described prefabricated pug, add andalusite fine powder, Kaolin micropowder, silicon powder and carry out mixed grind and prepare mixed grind mud
Material；
(2) described mixed grind pug is pressed into adobe, after the calcining of described adobe drying, prepares described andalusite composite refractory brick.
The preparation method of andalusite composite refractory brick the most according to claim 9, it is characterised in that described step (2) is wrapped
Include: described mixed grind pug is pressed into adobe, described adobe is dried the time 24 under the conditions of temperature is 60 DEG C～130 DEG C
Hour～36 hours；Then carry out calcining 10 hours～24 at a temperature of 1420 DEG C～1450 DEG C by dried described adobe
Hour, thus prepare described andalusite composite refractory brick.
9. the application of the andalusite composite refractory brick described in an any one of claim 1～6, it is characterised in that described red post
Stone composite refractory brick is applied in carbon baking furnace.
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| CN201610577322.1A CN106278299A (en) | 2016-07-21 | 2016-07-21 | Andalusite composite refractory brick and its preparation method and application |
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| CN201610577322.1A CN106278299A (en) | 2016-07-21 | 2016-07-21 | Andalusite composite refractory brick and its preparation method and application |
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| CN107089835A (en) * | 2017-05-03 | 2017-08-25 | 河南瑞泰耐火材料科技有限公司 | Carbon calciner andalusite mullite composite brick and preparation method thereof |
| CN111348927A (en) * | 2019-11-06 | 2020-06-30 | 郑州市奥达耐火材料有限公司 | Modified brick for lime kiln |
| CN111704448A (en) * | 2020-07-20 | 2020-09-25 | 济源市金峰耐火材料有限公司 | High-strength refractory brick and preparation method thereof |
| CN111792923A (en) * | 2020-07-20 | 2020-10-20 | 济源市金峰耐火材料有限公司 | Refractory brick and preparation method thereof |
| CN113716948A (en) * | 2021-09-13 | 2021-11-30 | 郑州东豫新材料科技有限公司 | Low-heat-conductivity refractory material for high-temperature pipeline system and preparation method thereof |
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