CN106187240A - Low-creep refractory brick and its preparation method and application - Google Patents
Low-creep refractory brick and its preparation method and application Download PDFInfo
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- CN106187240A CN106187240A CN201610577580.XA CN201610577580A CN106187240A CN 106187240 A CN106187240 A CN 106187240A CN 201610577580 A CN201610577580 A CN 201610577580A CN 106187240 A CN106187240 A CN 106187240A
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- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
- C04B35/16—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 silicates other than clay
- C04B35/18—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 silicates other than clay rich in aluminium oxide
- C04B35/185—Mullite 3Al2O3-2SiO2
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/04—Casings; Linings; Walls; Roofs characterised by the form, e.g. shape of the bricks or blocks used
- F27D1/06—Composite bricks or blocks, e.g. panels, modules
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- 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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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- 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
- C04B2235/34—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
- C04B2235/3427—Silicates other than clay, e.g. water glass
- C04B2235/3463—Alumino-silicates other than clay, e.g. mullite
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- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- 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
- C04B2235/34—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
- C04B2235/349—Clays, e.g. bentonites, smectites such as montmorillonite, vermiculites or kaolines, e.g. illite, talc or sepiolite
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
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- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
- C04B2235/9607—Thermal properties, e.g. thermal expansion coefficient
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Abstract
The present invention provides a kind of low-creep refractory brick, including major ingredient and additive, described major ingredient includes the raw material of following mass percent: flint clay bulky grain 20%～40%, the little granule of sillimanite 20%～30%, bonding clay fine powder 15%～40% and bauxite micropowder 5%～15%；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 low-creep refractory brick.The collocation of described low-creep 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 low-creep refractory brick masonry flue wall.
Description
Technical field
The invention belongs to technical field of refractory materials, specifically, relate to a kind of low-creep refractory brick and preparation side thereof
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 low-creep refractory brick of refractoriness under load and preferable heat stability.
To achieve these goals, the technical solution adopted in the present invention is to include major ingredient and additive, described major ingredient bag
Include the raw material of following mass percent: flint clay bulky grain 20%～40%, the little granule of sillimanite 20%～30%, bonding clay fine powder
15%～20% and bauxite micropowder 5%～35%；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: little of flint clay bulky grain 30%, sillimanite
Grain 27%, bonding clay fine powder 15% and bauxite micropowder 28%.
Based on above-mentioned, the oarse-grained granularity of described flint clay is 1 mm～3 mm.
Based on above-mentioned, the short grained granularity of described sillimanite is less than 1 mm.
Based on above-mentioned, the granularity of the described bonding clay fine powder granularity less than 0.074mm, described bauxite micropowder is little
In 0.043 mm.
Based on above-mentioned, described additive is pulp-water.
Wherein, described low-creep refractory brick is with the flint clay bulky grain in raw material, the little granule of sillimanite as aggregate, with aluminum vitriol
Soil grog micropowder, bonding clay fine powder are fines, are mixed by described additive.
The present invention also provides for the preparation method of a kind of described low-creep refractory brick, comprises the following steps:
(1) calculate according to above-mentioned mass percent, flint clay bulky grain, the little granule of sillimanite and additive are carried out mixed grind and prepares
Prefabricated pug；Then in described prefabricated pug, add bauxite micropowder, bonding clay fine powder and 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 low-creep refractory brick.
Based on above-mentioned, described step (2) including: described mixed grind pug is pressed into adobe, and by described adobe in temperature
It is dried 24 hours～36 hours under the conditions of being 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 low-creep refractory brick.
The present invention also provides for the application of a kind of above-mentioned low-creep refractory brick, and described low-creep refractory brick is applied to carbon baking
In stove.
In low-creep refractory brick raw material provided by the present invention, the performance effect of each composition is as follows:
Bauxite: refer to bauxite mineral material after calcining, it is mainly composed of diaspore and high alumina Silicon stone, tool
There is higher flashback performance, be commonly used to prepare various high-alumina brick, be that metallurgical industry is widely used fire-resistant or anti-with other industry
Rotten material.
Sillimanite: sillimanite is also silimanite or sillimanite, it is a kind of brown, light green color, light blue or white glass
Glass shape silicate mineral, is mainly composed of silicon oxide and aluminium oxide.The crystal of sillimanite is column or needle-like, and these crystal are polymerized
Together often in fibrous or radial, there is gloss or the glassy lustre of silk.Sillimanite heating after become mullite, by with
Make high grade refractory.
Flint clay: also known as one-level hard paste grog, is the multiple mixture containing aluminosilicate, and main chemical compositions is
Al2O3And SiO2, with a small amount of Fe2O3Na with trace2O、K2O, has volume stability, intensity after high-temperature calcination and greatly and inhales
The characteristics such as water rate is little, its refractoriness is up to more than 1750 DEG C, so that the described low-creep refractory brick of preparation has higher
Thermal shock resistance and preferable heat resistance.
Bonding clay: bonding clay is mainly kaolinite, silicon oxide and aluminium oxide, Se Bai and fire-resistant, for preparation china clay it
Primary raw material, is a kind of high plasticity clay.The performance of bonding clay fine powder is affected by factors, with mineralogical composition, mineral
Performance, crystallizable mineral feature, the granular size of mineral, electrolyte type, the Law of Cause of Formation of clay and processing technique etc. are because have
Close relationship.This case is chosen alumina content be 34%～37%, ferrum oxide less than 1.5% high-quality bonding clay, utilize it
Preferably caking property and plasticity makes bonding between each granule and micropowder closely and make low-creep refractory green brick forming more
By force.
Hinge structure of the present invention has prominent substantive distinguishing features and significantly progress, and specifically, the present invention will
Varigrained flint clay, sillimanite, bonding clay fine powder, bauxite and additive mix so that the brick of preparation
The collocation of each site component proportioning of base is consistent, it is ensured that the concordance of low-creep refractory brick each position performance of calcining gained, with
Time raw material in containing the prominent granularity material of a large amount of corner angle, increase critical granularity, provide firm bone for low-creep refractory brick
Shelf structure makes it in use be not likely to produce deformation.Meanwhile, flint clay, sillimanite, bonding clay, bauxite it are utilized respectively
The resistance to burning characteristic of grog and preferable mouldability and sillimanite calcination process formed have heat shock resistance power, resistance to slag strong,
The mullite that loading inversion point is high so that the low-creep refractory brick of preparation has high RUL, low creep, high thermal shock stability, from
And improve the carbon baking furnace service life applying described low-creep refractory brick masonry flue wall.And the raw material that the method uses
Be easy to get, composition is arranged in pairs or groups rationally, 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 low-creep refractory brick, and it includes aggregate, fines and pulp-water, wherein, the matter of described pulp-water
Amount is described aggregate and the 4.5% of described fines gross mass；Described aggregate and described fines include the former of following mass percent
Material: the little granule of flint clay bulky grain 30%, sillimanite 27%, bonding clay fine powder 15% and bauxite micropowder 28%.
Wherein, the oarse-grained granularity of described flint clay is 1 mm～3 mm, the short grained granularity of described sillimanite are less than 1
Mm, the granularity of described bonding clay fine powder are less than 0.074mm, the granularity of described bauxite micropowder is less than 0.043 mm.Respectively
Chemical composition in 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 |
| The little granule of sillimanite | 55%～58% | ≤1.1% | ≤1.0% | -- |
| Bauxite micropowder | ≥80% | ≤1.5% | ≤0.6% | -- |
| Bonding clay fine powder | 34%～37% | ≤1.5% | ≤0.5% | 11%～13% |
| Flint clay bulky grain | ≥45% | ≤1.0% | ≤1.0% | -- |
The present embodiment also provides for the preparation method of a kind of described low-creep refractory brick, and concrete preparation process includes:
Carry out bauxite, sillimanite, bonding clay and flint clay respectively pulverizing the raw material preparing above-mentioned granularity.
The flint clay bulky grain of above-mentioned mass percent, the little granule of sillimanite and pulp-water carry out mixed grind within 5 minutes, prepare
Prefabricated pug；Then in described prefabricated pug, add described bauxite micropowder and bonding clay fine powder and carry out mixed grind 20
Minute, prepare mixed grind pug；
Use the pressure tonnage brickmaking machine more than 315 tons that described mixed grind pug is pressed into adobe, then described adobe is put into
Being dried in tunnel type drying hole 24 hours, the inlet temperature wherein controlling described tunnel type drying hole is 60 DEG C, outlet temperature
Degree is 130 DEG C；Dried described adobe is loaded in fuel gas tunnel kiln and carries out calcining at a temperature of 1480 DEG C 10 hours, from
And prepare described low-creep refractory brick.After testing, the described low-creep refractory brick density that the present embodiment prepares is 2.31 g/cm3。
Low-creep refractory brick prepared by the preparation method provided by the present embodiment, can be applicable to build carbon baking furnace flame path by laying bricks or stones
Wall.
Embodiment 2
The present embodiment provides a kind of low-creep refractory brick, and concrete material composition is roughly the same with embodiment 1, and difference is,
The quality of pulp-water described in the present embodiment is described aggregate and the 5% of described fines gross mass, described aggregate and described fines bag
Include the raw material of following quality mass percent: the little granule of flint clay bulky grain 31%, sillimanite 29%, bonding clay fine powder 18% and
Bauxite micropowder 22%.
The preparation method of the low-creep refractory brick described in the present embodiment is roughly the same with the preparation method in embodiment 1, no
It is with part: described mixed grind pug is pressed into adobe, then described adobe is put in tunnel type drying hole and 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；By dried institute
State in adobe loading fuel gas tunnel kiln and carry out calcining at a temperature of 1470 DEG C 10 hours, thus prepare described low-creep refractory
Brick.After testing, the described low-creep refractory brick density that the present embodiment prepares is 2.29 g/cm3。
Low-creep refractory brick prepared by the preparation method provided by the present embodiment, can be applicable to build carbon baking furnace flame path by laying bricks or stones
Wall.
Embodiment 3
The present embodiment provides a kind of low-creep refractory brick, and concrete material composition is roughly the same with embodiment 1, and difference 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 and described carefully
Material includes the raw material of following mass percent: the little granule of flint clay bulky grain 31%, sillimanite 29%, bonding clay fine powder 20% and
Bauxite micropowder 20%.
The preparation method of the low-creep refractory brick described in the present embodiment is roughly the same with the preparation method in embodiment 1, no
It is with part: described mixed grind pug is pressed into adobe, then described adobe is put in tunnel type drying hole and 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 will be dried
Adobe carry out calcining at a temperature of 1450 DEG C 20 hours, thus prepare described low-creep refractory brick.After testing, the present embodiment
The described low-creep refractory brick density prepared is 2.33 g/cm3。
Low-creep refractory brick prepared by the preparation method provided by the present embodiment, can be applicable to build carbon baking furnace flame path by laying bricks or stones
Wall.
Low-creep refractory brick performance detects: respectively to Al in the low-creep refractory brick of embodiment 1～3 preparation2O3、Fe2O3Contain
Amount, apparent porosity, cold crushing strength and 1350 DEG C of high temperature break resistant intensity performances detect, and 0.2MPa pressure, 1280
DEG C calcining creep rate of 25 hours detects, and testing result is as shown in table 2.
Table 2, low-creep refractory brick performance detect
As can be seen from the above table: the softening point of the low-creep refractory brick that embodiment 1～3 provides is more than 1470 DEG C, room temperature is pressure
Intensity more than 68MPa, creep rate absolute value less than 0.4%, apparent porosity between 15.5%～16.2%, coefficient of thermal expansion is less than
0.6%, the most described low-creep refractory brick property indices meets GB/T3994-2013 set quota, and described low creep is resistance to
Firebrick has the high and low creep of load softening temperature, the performance of highly heatproof and shockproof, can apply to build carbon baking furnace flame path wall by laying bricks or stones and roasts
Burn and produce 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. a low-creep refractory brick, including major ingredient and additive, it is characterised in that described major ingredient includes following mass percent
Raw material: flint clay bulky grain 20%～40%, the little granule of sillimanite 20%～30%, bonding clay fine powder 15%～20% and bauxite
Grog micropowder 5%～35%；The quality of described additive is the 4.5%～5.5% of described major ingredient quality.
Low-creep refractory brick the most according to claim 1, it is characterised in that described major ingredient includes following mass percent
Raw material: the little granule of flint clay bulky grain 30%, sillimanite 27%, bonding clay fine powder 15% and bauxite micropowder 28%.
Low-creep refractory brick the most according to claim 1 and 2, it is characterised in that the oarse-grained granularity of described flint clay is 1
Mm～3 mm.
Low-creep refractory brick the most according to claim 3, it is characterised in that the short grained granularity of described sillimanite is less than 1
mm。
Low-creep refractory brick the most according to claim 4, it is characterised in that the granularity of described bonding clay fine powder is less than
0.074 mm, the granularity of described bauxite micropowder are less than 0.043 mm.
Low-creep refractory brick the most according to claim 5, it is characterised in that described additive is pulp-water.
7. a preparation method for described low-creep refractory brick, comprises the following steps:
(1) according to low-creep refractory brick described in any one of claim 1～6 mass percent calculate, by flint clay bulky grain,
The little granule of sillimanite and additive carry out mixed grind and prepare prefabricated pug；Then in described prefabricated pug, bauxite is added micro-
Powder, bonding clay fine 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 low-creep refractory brick.
The preparation method of low-creep refractory brick the most according to claim 7, it is characterised in that described step (2) including: will
Described mixed grind pug is pressed into adobe, and under the conditions of temperature is 60 DEG C～130 DEG C, described adobe is dried 24 hours～36
Hour；Then carry out calcining at a temperature of 1450 DEG C～1480 DEG C 10 hours～24 hours by dried described adobe, from
And prepare described low-creep refractory brick.
9. the application of the low-creep refractory brick described in an any one of claim 1～6, it is characterised in that described low creep is resistance to
Firebrick is applied in carbon baking furnace.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108503375A (en) * | 2018-03-08 | 2018-09-07 | 山东嘉腾实业有限公司 | High intensity ultra-large type keeps the temperature the preparation method of syphon |
| CN109053153A (en) * | 2018-09-11 | 2018-12-21 | 郑州荣盛窑炉耐火材料有限公司 | Low stomata clay brick of a kind of resisting temperature sudden turn of events chipping resistance and preparation method thereof |
| CN111056850A (en) * | 2019-11-06 | 2020-04-24 | 郑州市奥达耐火材料有限公司 | Quasi-sillimanite brick for glass melting furnace |
| CN111056851A (en) * | 2019-11-06 | 2020-04-24 | 郑州市奥达耐火材料有限公司 | Super low-porosity brick |
| CN111675546A (en) * | 2020-06-23 | 2020-09-18 | 郑州凯翔耐火材料有限公司 | Thermal shock resistant high-alumina brick and preparation method thereof |
| CN117902909A (en) * | 2024-03-19 | 2024-04-19 | 阳城县圣利安建材有限公司 | Flint clay brick and manufacturing method |
| CN117902909B (en) * | 2024-03-19 | 2024-06-11 | 阳城县圣利安建材有限公司 | Flint clay brick and manufacturing method |
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| CN104072175A (en) * | 2014-07-16 | 2014-10-01 | 山国强 | Lint clay brick for cement kiln calciner and preparation method thereof |
| CN105418098A (en) * | 2015-12-16 | 2016-03-23 | 董建军 | Heat-conductive and energy-saving refractory brick used for fire path wall in carbon roasting furnace and preparation method thereof |
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