CN106220155A - High RUL andalusite composite refractory brick and its preparation method and application - Google Patents
High RUL andalusite composite refractory brick and its preparation method and application Download PDFInfo
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Abstract
The present invention provides a kind of high RUL andalusite composite refractory brick, including major ingredient and additive, described major ingredient includes the raw material of following mass percent: bauxite bulky grain 6%～15%, andalusite bulky grain 14%～35%, the little granule of andalusite 20%～28%, Kaolin micropowder 12%～15%, andalusite fine powder 15%～30%；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 high RUL andalusite composite refractory brick.The collocation of described high RUL 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 high RUL 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 high RUL andalusite composite refractory brick
And its 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 roasting flue wall of prior art is built by laying bricks or stones by clay brick and is formed, and fuel enters in quirk
Row burning, and the anode block closing in hopper, anode is transferred heat to by high RUL andalusite composite fire brick
Carbon block roasting in the atmosphere not contacting flame.So, refractory material in anode-baking furnace except to stand long-term high temperature,
Outside high pressure, still suffering from periodic variations in temperature, therefore, the requirement to refractory material is that high temperature creep rate is low, loading softening
Temperature is high, thermal shock resistance can be good.
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
Shake stability is poor, long-time uses the shortcomings such as creep rate is big, can cause the appearance deformation that flue wall is too early, damage, anode carbon
Block produces and 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 performance, higher
Refractoriness under load and the high RUL andalusite composite refractory brick of preferable heat stability.
To achieve these goals, the technical solution adopted in the present invention is: a kind of high RUL andalusite composite refractory brick,
Including major ingredient and additive, described major ingredient includes the raw material of following mass percent: bauxite bulky grain 6%～15%, red
Pillar bulky grain 14%～35%, the little granule of andalusite 20%～28%, Kaolin micropowder 12%～15%, andalusite fine powder 15%～
30%；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 12%, andalusite
The little granule of bulky grain 20%, andalusite 27%, Kaolin micropowder 15%, andalusite fine powder 26%.
Based on above-mentioned, described additive is pulp-water.
Based on above-mentioned, the oarse-grained granularity of described bauxite is 1 mm～3 mm；The oarse-grained grain of described andalusite
Degree 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 0.074 mm, and the granularity of described Kaolin micropowder is less than
0.043 mm。
Wherein, described major ingredient includes aggregate and fines, and described high RUL andalusite composite refractory brick is with the aluminum vitriol in raw material
Soil grog bulky grain, andalusite bulky grain, the little granule of andalusite are aggregate, with Kaolin micropowder, andalusite fine powder as fines, logical
Cross described additive to mix.
The present invention also provides for the preparation method of a kind of described high RUL andalusite composite refractory brick, comprises the following steps:
(1) according to the raw material of above-mentioned mass percent, by bauxite bulky grain, andalusite bulky grain, the little granule of andalusite
And additive carries out mixed grind and prepares prefabricated pug；Then in described prefabricated pug, Kaolin micropowder and andalusite fine powder are added also
Carry out mixed grind and prepare mixed grind pug；
(2) described mixed grind pug is pressed into adobe, prepares described high RUL andalusite after the calcining of described adobe drying and be combined
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 high RUL andalusite composite refractory brick.
The present invention also provides for the application of a kind of above-mentioned high RUL andalusite composite refractory brick, it is characterised in that described Gao He
Soft andalusite composite refractory brick is applied in carbon baking furnace.
In high RUL 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 high RUL andalusite composite refractory brick have
High RUL, low creep, 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 high RUL andalusite composite refractory brick
Anti-calcining, Kaolin be combined with water formed pug there is higher plasticity so that the described adobe of preparation has relatively
Good mouldability.
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.
Hinge structure of the present invention has prominent substantive distinguishing features and significantly progress, and specifically, the present invention will
Varigrained bauxite, Kaolin, andalusite and additive mix so that each site component of the adobe of preparation
Proportioning collocation is consistent, it is ensured that the concordance of high RUL andalusite composite refractory brick each position performance of calcining gained, the most former
Containing the granularity material that a large amount of corner angle are prominent in material, increase critical granularity, provide jail for high RUL andalusite composite refractory brick
Solid framing structure make it in use be not likely to produce deformation.It is utilized respectively bauxite, kaolinic resistance to burning simultaneously
Heat shock resistance power, resistance to slag be strong, loading inversion point having of being formed of calcination process for characteristic and preferable mouldability and andalusite
High mullite so that the high RUL andalusite composite refractory brick of preparation has high RUL, low creep, high thermal shock stability, from
And improve the carbon baking furnace service life applying described high RUL andalusite composite fire brick masonry flue wall.And the method
The raw material used 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 high RUL andalusite composite refractory brick, and it includes aggregate, fines and pulp-water, wherein, described
The quality of pulp-water is described aggregate and the 4.5% of described fines gross mass；Described aggregate and described fines are by following percent mass
The raw material composition of number: bauxite bulky grain 12%, andalusite bulky grain 20%, the little granule of andalusite 27%, Kaolin micropowder
15%, andalusite fine powder 26%.
Wherein, the oarse-grained granularity of described bauxite is 1 mm～3 mm, the oarse-grained granularity of described andalusite are 1
Mm～3 mm, the short grained granularity of described andalusite less than 1 mm, described andalusite fine powder granularity less than 0.074 mm, described
The granularity of Kaolin micropowder is less than 0.043 mm.Chemical composition in each raw material is as shown in table 1.
Table 1, each raw material main chemical compositions
| Raw material | Al2O3 | Fe2O3 | K2O+NaO | Loss on ignition |
| Andalusite bulky grain, little granule, fine powder | 55%～58% | ≤1.1% | ≤1.0% | -- |
| Bauxite bulky grain | ≥80% | ≤1.5% | ≤0.6% | -- |
| Kaolin micropowder | 32%～36% | ≤1.0% | ≤1.0% | 11%～13% |
The present embodiment also provides for the preparation method of a kind of high RUL andalusite composite refractory brick, and concrete preparation process includes:
Respectively andalusite, bauxite and Kaolin are pulverized, prepare the raw material of above-mentioned granularity.
By little to the described bauxite bulky grain of above-mentioned mass percent, described andalusite bulky grain, described andalusite
Granule and described pulp-water carry out mixed grind and prepare prefabricated pug in 5 minutes；Then in described prefabricated pug, add above-mentioned quality hundred
The described Kaolin micropowder of mark and described andalusite fine powder also carry out mixed grind 20 minutes, prepare 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 high RUL andalusite composite refractory brick.After testing, the described high RUL andalusite that the present embodiment prepares is multiple
Closing refractory brick density is 2.45 g/cm3。
High RUL andalusite composite refractory brick prepared by the preparation method provided by the present embodiment, can be applicable to build carbon element by laying bricks or stones
Baking furnace flame path wall.
Embodiment 2
The present embodiment provides a kind of high RUL andalusite composite refractory brick, and concrete material composition is roughly the same with embodiment 1, different
Part be, in the present embodiment, the quality of described pulp-water is described aggregate and the 5% of described fines gross mass, described aggregate and
Described fines includes the raw material of following mass percent: bauxite bulky grain 11%, andalusite bulky grain 20%, andalusite are little
Granule 28%, Kaolin micropowder 12%, andalusite fine powder 29%.
The preparation method of the high RUL andalusite composite refractory brick described in the present embodiment is big with the preparation method in embodiment 1
Causing identical, difference is: described mixed grind pug is pressed into adobe, then described adobe is put in tunnel type drying hole
Be dried 30 hours, wherein control the inlet temperature of described tunnel type drying hole be 60 DEG C, outlet temperature be 130 DEG C；Will be dry
Described adobe loading fuel gas tunnel kiln after dry carries out calcining 12 hours at a temperature of 1470 DEG C thus prepares described Gao He
Soft andalusite composite refractory brick.After testing, the described high RUL andalusite composite refractory brick density that the present embodiment prepares is 2.46
g/cm3。
High RUL andalusite composite refractory brick prepared by the preparation method provided by the present embodiment, can be applicable to build carbon element by laying bricks or stones
Baking furnace flame path wall.
Embodiment 3
The present embodiment provides a kind of high RUL andalusite composite refractory brick, and concrete material composition is roughly the same with embodiment 1, different
Part is, in the present embodiment, the quality of described pulp-water is described aggregate and the 5.5% of described fines gross mass, described aggregate
With the raw material that described fines includes following mass percent: bauxite bulky grain 6%, andalusite bulky grain 24%, andalusite
Little granule 28%, Kaolin micropowder 13%, andalusite fine powder 29%.
The preparation method of the high RUL andalusite composite refractory brick described in the present embodiment is big with the preparation method in embodiment 1
Causing identical, difference is: described mixed grind pug is pressed into adobe, then described adobe is put in tunnel type drying hole
Be dried 24 hours, wherein control the inlet temperature of described tunnel type drying hole be 60 DEG C, outlet temperature be 130 DEG C；Then
Carry out calcining at a temperature of 1450 DEG C 20 hours by dried adobe, thus prepare described high RUL andalusite composite fire
Brick.After testing, the described high RUL andalusite composite refractory brick density that the present embodiment prepares is 2.47 g/cm3。
High RUL andalusite composite refractory brick prepared by the preparation method provided by the present embodiment, can be applicable to build carbon element by laying bricks or stones
Baking furnace flame path wall.
Embodiment 4
The present embodiment provides a kind of high RUL andalusite composite refractory brick, and concrete material composition is roughly the same with embodiment 1, different
Part be, in the present embodiment, the quality of described pulp-water is described aggregate and the 5% of described fines gross mass, described aggregate and
Described fines includes the raw material of following mass percent: bauxite bulky grain 13%, andalusite bulky grain 19%, andalusite are little
Granule 26%, Kaolin micropowder 14%, andalusite fine powder 28%.
The preparation method of the high RUL andalusite composite refractory brick described in the present embodiment is big with the preparation method in embodiment 1
Causing identical, difference is: by the described bauxite bulky grain of above-mentioned mass percent, described andalusite bulky grain,
The little granule of described andalusite and described pulp-water carry out mixed grind and prepare prefabricated pug in 3 minutes；Then add in described prefabricated pug
Enter the described Kaolin micropowder of above-mentioned mass percent and described andalusite fine powder and carry out mixed grind 18 minutes, preparing mixed grind mud
Material；Remaining step is with the preparation method in embodiment 1.After testing, the described high RUL andalusite that the present embodiment prepares is combined resistance to
Firebrick density is 2.46 g/cm3。
High RUL andalusite composite refractory brick prepared by the preparation method provided by the present embodiment, can be applicable to build carbon element by laying bricks or stones
Baking furnace flame path wall.
High RUL andalusite composite refractory brick performance detects
Respectively to Al in the described high RUL andalusite composite refractory brick of embodiment 1～4 preparation2O3、Fe2O3Content, apparent pore
Rate, cold crushing strength and 1350 DEG C of high temperature break resistant intensity performances detect, and 25 little in 0.2MPa pressure, 1280 DEG C of insulations
Time and the creep rate of 50 hours detect, testing result is as shown in table 2.
Table 2, high RUL andalusite composite refractory brick performance detect
As can be seen from the above table: the softening point of the high RUL andalusite composite refractory brick that embodiment 1～4 provides is more than 1650
DEG C, cold crushing strength more than 50MPa, creep rate absolute value less than 0.4%, apparent porosity less than 18%, coefficient of thermal expansion is less than
0.65%, the most described high RUL andalusite composite refractory brick property indices meets GB/T3994-2013 set quota,
Described high RUL andalusite composite refractory brick has the high and low creep of load softening temperature, the performance of highly heatproof and shockproof, can apply to build
Build carbon baking furnace flame path wall.
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. a high RUL andalusite composite refractory brick, including major ingredient and additive, it is characterised in that described major ingredient includes following
The raw material of mass percent: bauxite bulky grain 6%～15%, andalusite bulky grain 14%～35%, the little granule of andalusite 20%
～28%, Kaolin micropowder 12%～15%, andalusite fine powder 15%～30%；The quality of described additive is described major ingredient quality
4.5%～5.5%.
High RUL andalusite composite refractory brick the most according to claim 1, it is characterised in that described major ingredient includes following matter
The raw material of amount percent: bauxite bulky grain 12%, andalusite bulky grain 20%, the little granule of andalusite 27%, Kaolin micropowder
15%, andalusite fine powder 26%.
High RUL andalusite composite refractory brick the most according to claim 1 and 2, it is characterised in that described additive is paper
Pulp-water.
High RUL andalusite composite refractory brick the most according to claim 3, it is characterised in that big of described bauxite
The granularity of grain is 1 mm～3 mm；The oarse-grained granularity of described andalusite is 1 mm～3 mm.
High RUL andalusite composite refractory brick the most according to claim 4, it is characterised in that described andalusite is short grained
Granularity is less than 1 mm.
High RUL andalusite composite refractory brick the most according to claim 5, it is characterised in that the grain of described andalusite fine powder
Degree is less than 0.043 mm less than 0.074 mm, the granularity of described Kaolin micropowder.
7. a preparation method for described high RUL andalusite composite refractory brick, comprises the following steps:
(1) calculate according to the high RUL andalusite composite refractory brick raw materials quality percent described in any one of claim 1～6,
Bauxite bulky grain, andalusite bulky grain, the little granule of andalusite and additive are carried out mixed grind and prepares prefabricated pug；Then
In described prefabricated pug, add Kaolin micropowder and andalusite fine powder and carry out mixed grind and prepare mixed grind pug；
(2) described mixed grind pug is pressed into adobe, prepares described high RUL andalusite after the calcining of described adobe drying and be combined
Refractory brick.
The preparation method of high RUL andalusite composite refractory brick the most according to claim 7, it is characterised in that described step
(2) including: described mixed grind pug is pressed into adobe, described adobe is dried under the conditions of temperature is 60 DEG C～130 DEG C
24 hours～36 hours；Then carry out dried described adobe at a temperature of 1420 DEG C～1450 DEG C calcining 10 hours～
24 hours, thus prepare described high RUL andalusite composite refractory brick.
9. the application of the high RUL andalusite composite refractory brick described in an any one of claim 1～6, it is characterised in that institute
State high RUL andalusite composite refractory brick to be applied in carbon baking furnace.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111763094A (en) * | 2020-07-23 | 2020-10-13 | 郑州金龙新材料有限公司 | Low-creep clay refractory brick for carbon furnace and preparation method thereof |
| CN111792939A (en) * | 2020-07-23 | 2020-10-20 | 郑州金龙新材料有限公司 | High-aluminum brick and preparation method thereof |
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| CN111763094A (en) * | 2020-07-23 | 2020-10-13 | 郑州金龙新材料有限公司 | Low-creep clay refractory brick for carbon furnace and preparation method thereof |
| CN111792939A (en) * | 2020-07-23 | 2020-10-20 | 郑州金龙新材料有限公司 | High-aluminum brick and preparation method thereof |
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