CN106673672A - Composition for preparing molten aluminum runner, molten aluminum runner and preparation method of molten aluminum runner - Google Patents
Composition for preparing molten aluminum runner, molten aluminum runner and preparation method of molten aluminum runner Download PDFInfo
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Abstract
The invention relates to the field of refractory materials and concretely provides a composition for preparing a molten aluminum runner. The composition comprises an aggregate, a filler, a binder and a dispersant. The aggregate comprises one or more of fused silica particles, electro-fused corundum particles and electro-fused mullite particles. The filler contains 20-100% by weight of a first filler. The first filler is fly ash. The invention provides a molten aluminum runner and a preparation method thereof. The preparation method comprises mixing the composition and water to obtain a castable material, pouring the castable material into a mold, carrying out molding, and carrying out maintenance, demolding, drying and calcining. The used composition is the composition provided by the invention. The volume density of the molten aluminum runner is 1.5-2.5 g/cm<3>, the apparent porosity is 10-40%, the compressive strength is 20-80MPa and the flexural strength is 5-20MPa. The preparation method and formula are environmentally friendly, realize a low cost, effectively utilize the industrial solid wastes, and improve the use performances of the molten aluminum runner.
Description
Technical field
The invention belongs to fire resisting material field, and in particular to one kind prepares aluminum water flow grooves compositionss and one
Plant aluminum water flow grooves and preparation method thereof.
Background technology
Chute is the functional refractory for being used for transporting molten aluminum water in aluminum deep processing industry, and it has holds
Connect, be oriented to, shunting, conveying, the pivotal roles such as control of classifying, with flashboard with the use of height can be realized
Warm aluminum current direction and flow speed control, to meet the Production requirement of different aluminum alloys product.Due to chute it is direct
Contacted with aluminium liquid, therefore, its quality directly determine production can be smoothed out, aluminum water it is clean
Can cleanliness the key link such as ensure.
Aluminum deep process technology gradually develops through repeatedly innovation to profound high-end product, grade to product,
Cleanliness factor, crystalline structure are put forward higher requirement.This also requires that the chute fire resisting with aluminium liquid directly contact
Material must possess higher performance, and such as surface is smooth, difficult and aluminium liquid moistening, more preferable resistance to aluminium liquid corrode
Property, excellent thermal shock resistance, good heat insulation effect, light weight and it is easily installed.Because chute is
Expendable material in aluminum deep processing production process, needs periodic replacement, therefore, this requires chute material
While with superperformance, also there is relatively low price, to reduce the production cost of aluminium alloy.
CN104475692A discloses a kind of processing technology of aluminum water flow grooves, by the stirring of quartziferous castable
Pour mould vibrating forming after uniform into, maintenance carries out the demoulding after being dried 24 hours, after reoxidizing 5-6 days
Toast 2-4 days in 350-450 DEG C into low temperature kiln, three medial surface of convective tank are sprayed after kiln discharge
Glaze, is then dried 24 hours, and 30 minutes are incubated in 760-800 DEG C into middle temperature kiln, goes out after cooling
Kiln, obtains chute product.Due to coating one layer of glaze in chute preform surfaces, therefore, chute
Surface smoothness very well, make the aluminum water energy of flowing enough quickly by chute, reduce aluminum water flow process
In temperature drop, so as to improve heat-insulating property.But the method complex process, the production cycle is longer,
And the spraying of glaze will further increase the cost of product.
CN204035488U discloses a kind of chute prefabricated component for aluminium liquid conveying, in its bottom edge
An embedding nugget category ceramic refractory impact block, so as to improving aluminum-resistant liquid scouring capability, while in impact
After block abrasion to a certain degree, can re-replace.However, the installation of impact block will reduce chute aluminium liquid
The aluminium liquid that delivered volume, surface adhesion or gap are penetrated into becomes the replacement operation for making impact block to be particularly stranded
It is difficult.
The content of the invention
It is an object of the invention to provide a kind of low cost preparation method of high-performance aluminum water flow grooves, to meet aluminum
The use requirement of deep processing industry convective tank refractory material.
To realize the purpose of the present invention, according to the first aspect of the invention, the invention provides prepared by one kind
Aluminum water flow grooves compositionss, said composition includes：Aggregate, inserts, bonding agent and dispersant；Wherein,
The one kind or many of the aggregate in vitreous silica granule, electro-corundum granule and electrofused mullite granule
Kind, the inserts contain the first inserts, and first inserts are flyash, first filling
It is 20-100 weight % that material accounts for the content of total inserts.
According to the second aspect of the invention, the invention provides a kind of method for preparing aluminum water flow grooves, the party
Method includes：Aluminum water flow grooves compositionss will be prepared and water is mixed to get castable, castable is injected into mould
In carry out molding, then carry out the maintenance demoulding, drying and calcination；The compositionss are of the present invention
Compositionss.
According to the third aspect of the invention we, the invention provides one kind is prepared according to the method for the present invention
Aluminum water flow grooves, wherein, bulk density is 1.5-2.5g/cm3, apparent porosity is 10-40%, resistance to pressure
Spend for 20-80MPa, rupture strength is 5-20MPa.
The typical performance of the aluminum water flow grooves product prepared using the present invention is as follows, and bulk density is
1.5-2.5g/cm3, apparent porosity is 10-40%, and compressive resistance is 20-80MPa, rupture strength 5-20MPa,
And thermal shock resistance is excellent, shock resistance, heat insulating ability effect are good.
The composition of raw materials environmental protection of the present invention, with low cost, preparation process is simple is easy to extensive work
Industry is produced.
The preparation method of aluminum water flow grooves according to the present invention, environmental protection is with low cost, not only effectively sharp
With industrial solid castoff, while also improving the performance of aluminum water flow grooves.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Description of the drawings
Accompanying drawing is, for providing a further understanding of the present invention, and to constitute the part of description, with
Detailed description below is used to explain the present invention together, but is not construed as limiting the invention.
In accompanying drawing：
Fig. 1 is shown the bulk density and apparent pore of fly ash content (based on aggregate) convective tank material
The impact of rate.
Specific embodiment
The specific embodiment of the present invention is described in detail below.It should be appreciated that this place is retouched
The specific embodiment stated is merely to illustrate and explains the present invention, is not limited to the present invention.
As it was previously stated, the invention provides one kind prepares aluminum water flow grooves compositionss, said composition includes：
Aggregate, inserts, bonding agent and dispersant；Wherein, the aggregate is selected from vitreous silica granule, electric smelting
One or more in corundum in granules and electrofused mullite granule, the inserts contain the first inserts,
First inserts are flyash, and it is 20-100 weights that first inserts account for the content of total inserts
Amount %.
A preferred embodiment of the invention, also contains the second inserts, institute in the inserts
The conventional selection that the second inserts can be this area is stated, for the present invention, preferably the second inserts are stone
One or more in Ying Fen, alumina powder, silicon ash, bauxite and aluminosilicate.
A preferred embodiment of the invention, it is 40-70 that the first inserts account for the content of total inserts
Weight %, it is 30-60 weight % that the second inserts account for the content of total inserts.It is possible thereby to further carry
The performance of high alumina water flow grooves product.
A preferred embodiment of the invention, the median of the second inserts is less than 100 microns,
Preferably 20-75 microns and/or 0.5-10 microns.It is possible thereby to further improve the property of aluminum water flow grooves product
Energy.Wherein, preferably the median of the second inserts is that 20-75 microns and/or 0.5-10 microns are referred to
Second inserts are that median is for median for the inserts or the second inserts of 20-75 microns
The inserts of 0.5-10 microns or the second inserts be median for 0.5-10 microns inserts with
Position particle diameter is the mixture of the inserts of 20-75 microns.
In the present invention, when median refers to the cumulative particle sizes percentile of particulate samples and reaches 50%
Corresponding particle diameter (particle diameter), its physical significance is particle diameter accounts for 50% more than its granule, little
50% is also accounted in its granule.
According to the present invention, the flyash is the coal-fired by-product in thermal power plant, i.e., from combustion tail gas
Through the tiny particles content that dust collecting systems at different levels are obtained.
A preferred embodiment of the invention, the median of the flyash is 1-100 microns.
A preferred embodiment of the invention, in terms of dry weight, the flyash contains 30-65 weights
The SiO of amount %2, 15-55 weight % Al2O3With the CaO of 1-20 weight %.
A preferred embodiment of the invention, the median of the aggregate is 0.1-5mm.
A preferred embodiment of the invention, aggregate is 100 with the weight ratio of flyash：(1-90),
Preferably 100：(20-70)；The consumption of bonding agent is the 2-30% of the gross weight of aggregate and inserts, excellent
Elect 3-20% as；The consumption of dispersant is less than the 5% of aggregate and inserts gross weight, preferably 0.3-5%.
It is possible thereby to further improve the performance of aluminum water flow grooves.
Fig. 1 shows the bulk density and aobvious gas of fly ash content (based on aggregate) convective tank product material
The impact of porosity, wherein, the proportioning of feedstock composition is as follows, and median is the tekite of 1-2mm
English granule 10kg, median are the vitreous silica granule 5kg of 0.5-1mm, median is
The vitreous silica granule 3kg of 0.1-0.5mm, the median of flyash are 60 microns, median is
Silicon ash 6kg of 0.8um, refractory cement 1kg, sodium tripolyphosphate 0.1kg, stir after the 2kg that adds water,
Then vibrating casting molding, the prefabricated component after the demoulding is dried 12h in 120 DEG C of baking oven, then will be pre-
Product is proceeded in calcining furnace, and with the heating rate of 2 DEG C/min 800 DEG C are risen to, and is incubated 2h, natural cooling,
So as to obtain aluminum water flow grooves product.As seen from Figure 1, the aluminum water for being prepared using the compositionss of the present invention
Chute product is due to relatively low density and the higher porosity, therefore it also has excellent heat insulating ability
Energy.
In the present invention, optional wider range of the species of the bonding agent, combination commonly used in the art
Agent may be incorporated for the present invention, a preferred embodiment of the invention, and the bonding agent is cement
And/or aluminium hydroxide.
In the present invention, optional wider range of the species of the dispersant, dispersion commonly used in the art
Agent may be incorporated for the present invention, and a preferred embodiment of the invention, the dispersant is selected from three
One or more in polyphosphate sodium, sodium hexameta phosphate, Polyethylene Glycol and polyacrylate.
Preparing aluminum water flow grooves using the compositionss of the present invention can realize the purpose of the present invention, for this
It is bright, a kind of method for preparing aluminum water flow grooves is specifically provided, the method includes：
Aluminum water flow grooves compositionss will be prepared and water is mixed to get castable, castable is injected to enter in mould
Row molding, then carries out the maintenance demoulding, drying and calcination；The compositionss are combination of the present invention
Thing.
In the present invention, the step of conserve the demoulding, drying and calcination and condition can refer to the routine of this area
Technology is carried out, and the present invention is to this without particular/special requirement.
A preferred embodiment of the invention, compositionss are (8-15) with the weight ratio of water：1.
A preferred embodiment of the invention, the temperature of calcining is 500-1000 DEG C, preferably
700-900℃；It is preferred that the heating rate calcined be less than 10 DEG C/min, more preferably 2-8 DEG C/min.
A preferred embodiment of the invention, the temperature retention time of calcining is 1-5h.
A preferred embodiment of the invention, the present invention is carried out as follows：
(1) load weighted aggregate, inserts, bonding agent, dispersant and water are added in batch mixer,
High-speed stirred batch mixing, until the castable being uniformly mixed；
(2) pre-designed mould is placed on vibration platen, after opening vibration, castable is fallen
Enter mould, it is ensured that castable has preferable mobility in mould and gas is fully excluded；
(3) the maintenance demoulding is carried out to the chute prefabricated component in mould, for example, conserves the demoulding generally in room temperature
2-48h is kept in environment or climatic chamber, prefabricated component is had after enough intensity is carried out again at the demoulding
Reason；
(4) prefabricated component after the demoulding is dried, the temperature of drying is preferably 80-250 DEG C；
(5) finally in high temperature furnace prefabricated component is calcined in 500-1000 DEG C, so as to obtain intensity
The chute product of high, good thermal shock and resistance to aluminum water erosion excellent performance.
As it was previously stated, the invention provides the aluminum water flow grooves prepared according to the method for the present invention, wherein,
Bulk density is 1.5-2.5g/cm3, preferably 1.8-2.1g/cm3；Apparent porosity is 10-40%, preferably
18-32%；Compressive resistance is 20-80MPa, preferably 30-50MPa；Rupture strength is 5-20MPa,
Preferably 6-15MPa.
In the present invention, bulk density using GB/T 2997-2000 densification shaping refractory product bulk densities,
Apparent porosity and true porosity test method are obtained.
Apparent porosity is using GB/T 2997-2000 densification shaping refractory product bulk densities, apparent porosity
Obtain with true porosity test method.
Compressive resistance is obtained using the refractory material cold crushing strength test methods of GB/T 50722008.
Rupture strength is obtained using GB/T 3001-2007 refractory material strength at normal temperature test methods.
In the present invention, the flyash for being adopted is all from quasi- Ge Er power plant of Shenhua.
Below by embodiment for whole process is described in detail, but the claim model of the present invention
Enclose and be not restricted by the embodiments.Meanwhile, embodiment has been merely given as realizing the partial condition of this purpose,
But it is not meant to that must being fulfilled for these conditions can just reach this purpose.
Embodiment 1
It is the vitreous silica granule 10kg of 1-2mm, median for 0.5-1mm's to weigh median
Vitreous silica granule 5kg, median are vitreous silica granule 3kg, the median of 0.1-0.5mm
For the flyash 5kg of 60um, median be the flyash 2.5kg of 2um, refractory cement 1kg, point
Powder sodium tripolyphosphate (number-average molecular weight 368) 0.1kg, water 2kg；The flyash for being adopted contains 32wt%
Al2O3, 45wt% SiO2With the CaO of 10wt%, remaining is a small amount of Fe2O3、K2O、Na2O、
MgO etc..Said mixture is added in blender, 10min is stirred with the rotating speed of 50rpm, form mixed
Uniform castable is closed, the chute mould for designing is put on vibration platen, open vibration, will be poured into a mould
Material pours mould into, and continues to vibrate 5min, it is ensured that gas is excluded completely, and mould is placed in into 25 DEG C of room temperature
Lower placement 24h, the then demoulding, and the prefabricated component after the demoulding is dried 12h in 120 DEG C of baking oven, so
Prefabricated component is proceeded in calcining furnace afterwards, with the heating rate of 2 DEG C/min 800 DEG C are risen to, be incubated 2h, from
So cooling, so as to obtain aluminum water flow grooves product, bulk density is 1.8g/cm3, apparent porosity is 32%,
Compressive resistance is 30MPa, rupture strength 6MPa.
Embodiment 2
It is the vitreous silica granule 10kg of 1-2mm, median for 0.5-1mm's to weigh median
Electrofused mullite granule 4kg, median are electro-corundum granule 2kg, the middle position grain of 0.1-0.5mm
Footpath is the flyash 8kg of 45um, median is silicon ash 6kg of 0.8um, refractory cement 3kg, point
Powder Polyethylene Glycol (number-average molecular weight 600) 0.3kg, water 3kg, the flyash for being adopted contains 18wt%
Al2O3, 54wt% SiO2With the CaO of 14wt%, remaining is a small amount of Fe2O3、K2O、Na2O、
MgO etc..Said mixture is added in blender, 20min is stirred with the rotating speed of 30rpm, form mixed
Uniform castable is closed, the chute mould for designing is put on vibration platen, open vibration, will be poured into a mould
Material pours mould into, and continues to vibrate 10min, it is ensured that gas is excluded completely, and mould is placed in into constant temperature and humidity
In case, in the environment of 60 DEG C and 50% humidity 12h is kept, the then demoulding, and the demoulding after it is prefabricated
Part is dried 24h in 80 DEG C of baking oven, then prefabricated component is proceeded in calcining furnace, with the liter of 5 DEG C/min
Warm speed rises to 700 DEG C, is incubated 4h, natural cooling, so as to obtain aluminum water flow grooves product, bulk density
For 2.1g/cm3, apparent porosity is 25%, and compressive resistance is 45MPa, rupture strength 12MPa.
Embodiment 3
Weigh the electricity that median is the vitreous silica granule 10kg of 3-5mm, median is 1-2mm
Molten corundum in granules 5kg, median are the electro-corundum granule 2.5kg of 0.3-0.8mm, median is
The flyash 5kg of 20um, median are the alumina powder 4kg of 8um, median is 2um
Flyash 3kg, refractory cement 4kg, aluminium hydroxide 1.8kg, dispersant sodium polyacrylate (number divide equally
Son measures 8000) 1.4kg, water 4.5kg, Al of the flyash for being adopted containing 48wt%2O3, 41wt%
SiO2With the CaO of 5wt%, remaining is a small amount of Fe2O3、K2O、Na2O, MgO etc..Will be above-mentioned
Mixture is added in blender, and with the rotating speed of 80rpm 30min is stirred, and forms the castable of mix homogeneously,
The chute mould for designing is put on vibration platen, vibration is opened, castable is poured into mould, and after
Continuous vibration 30min, it is ensured that gas is excluded completely, and mould is placed in climatic chamber, at 80 DEG C and
12h is kept in the environment of 30% humidity, then the demoulding, and the baking the prefabricated component after the demoulding at 150 DEG C
8h is dried in case, then prefabricated component is proceeded in calcining furnace, with the heating rate of 8 DEG C/min 900 are risen to
DEG C, insulation 2h, natural cooling, so as to obtain aluminum water flow grooves product, bulk density is 1.9g/cm3, show
The porosity is 18%, and compressive resistance is 50MPa, rupture strength 15MPa.
The preparation method of aluminum water flow grooves according to the present invention, green ring can be seen that by the result of embodiment
Protect, it is with low cost, industrial solid castoff is not only effectively utilized, while also improving aluminum water flow grooves
Performance.
The preferred embodiment of the present invention described in detail above, but, the present invention is not limited to above-mentioned reality
The detail in mode is applied, in the range of the technology design of the present invention, can be to the technical side of the present invention
Case carries out various simple variants, and these simple variants belong to protection scope of the present invention.
It is further to note that each particular technique described in above-mentioned specific embodiment is special
Levy, in the case of reconcilable, can be combined by any suitable means.
Additionally, combination in any can also be carried out between a variety of embodiments of the present invention, as long as its
Without prejudice to the thought of the present invention, it should equally be considered as content disclosed in this invention.
Claims (11)
1. one kind prepares aluminum water flow grooves compositionss, it is characterised in that said composition includes：Aggregate, fill out
Charge, bonding agent and dispersant；Wherein, the aggregate is selected from vitreous silica granule, electro-corundum granule
With one or more in electrofused mullite granule, the inserts contain the first inserts, and described first
Inserts are flyash, and it is 20-100 weight % that first inserts account for the content of total inserts.
2. compositionss according to claim 1, wherein, also containing the second filling in the inserts
Material, the second inserts be silica flour, alumina powder, silicon ash, bauxite and aluminosilicate in one kind or
It is various.
3. compositionss according to claim 2, wherein, the first inserts account for the content of total inserts
For 40-70 weight %, it is 30-60 weight % that the second inserts account for the content of total inserts.
4. compositionss according to claim 2, wherein, the median of the second inserts is less than
100 microns, preferably 20-75 microns and/or 0.5-10 microns.
5. compositionss according to any one in claim 1-4, wherein, the flyash is
The coal-fired by-product in thermal power plant, median is 1-100 microns；In terms of dry weight, flyash contains
The SiO of 30-65 weight %2, 15-55 weight % Al2O3With the CaO of 1-20 weight %.
6. compositionss according to any one in claim 1-4, wherein, the middle position of the aggregate
Particle diameter is 0.1-5mm.
7. compositionss according to any one in claim 1-4, wherein, aggregate and flyash
Weight ratio is 100：(1-90), preferably 100：(20-70)；The consumption of bonding agent is aggregate and filling
The 2-30% of the gross weight of material, preferably 3-20%；The consumption of dispersant is less than aggregate and inserts gross weight
The 5% of amount, preferably 0.3-5%.
8. compositionss according to any one in claim 1-4, wherein,
The bonding agent is cement and/or aluminium hydroxide.
The dispersant is in sodium tripolyphosphate, sodium hexameta phosphate, Polyethylene Glycol and polyacrylate
One or more.
9. a kind of method for preparing aluminum water flow grooves, the method includes：
Aluminum water flow grooves compositionss will be prepared and water is mixed to get castable, castable is injected to enter in mould
Row molding, then carries out the maintenance demoulding, drying and calcination；Characterized in that, the compositionss are right
Require the compositionss described in any one in 1-8.
10. method according to claim 9, wherein, compositionss are (8-15) with the weight ratio of water：
1；The temperature of calcining is 500-1000 DEG C, preferably 700-900 DEG C；The heating rate of calcining is less than
10 DEG C/min, preferably 2-8 DEG C/min；The temperature retention time of calcining is 1-5h.
The aluminum water flow grooves that method described in 11. claim 9 or 10 is prepared, wherein, volume is close
Spend for 1.5-2.5g/cm3, apparent porosity is 10-40%, and compressive resistance is 20-80MPa, and rupture strength is
5-20MPa。
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| CN109400145A (en) * | 2018-11-13 | 2019-03-01 | 中铸新材工业（江苏）有限公司 | A kind of manufacturing method of energy-saving aluminium water flow grooves prefabricated component |
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| CN112279661A (en) * | 2020-11-11 | 2021-01-29 | 艾文斯（焦作）冶金材料有限责任公司 | Light non-stick aluminum material and production method thereof |
| CN112461007A (en) * | 2020-11-09 | 2021-03-09 | 山东南山铝业股份有限公司 | Preparation method of converter launder |
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| CN112461007A (en) * | 2020-11-09 | 2021-03-09 | 山东南山铝业股份有限公司 | Preparation method of converter launder |
| CN112279661A (en) * | 2020-11-11 | 2021-01-29 | 艾文斯（焦作）冶金材料有限责任公司 | Light non-stick aluminum material and production method thereof |
| CN112279661B (en) * | 2020-11-11 | 2022-07-22 | 艾文斯（焦作）冶金材料有限责任公司 | Light non-stick aluminum material and production method thereof |
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