CN106673672B - Composition for preparing aluminum water flow groove, aluminum water flow groove and preparation method thereof - Google Patents
Composition for preparing aluminum water flow groove, aluminum water flow groove and preparation method thereof Download PDFInfo
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- CN106673672B CN106673672B CN201510766043.5A CN201510766043A CN106673672B CN 106673672 B CN106673672 B CN 106673672B CN 201510766043 A CN201510766043 A CN 201510766043A CN 106673672 B CN106673672 B CN 106673672B
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 56
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 56
- 239000000203 mixture Substances 0.000 title claims abstract description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 238000002360 preparation method Methods 0.000 title abstract description 9
- 239000002245 particle Substances 0.000 claims abstract description 63
- 239000000945 filler Substances 0.000 claims abstract description 48
- 239000010881 fly ash Substances 0.000 claims abstract description 21
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000001354 calcination Methods 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 14
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 12
- 238000001035 drying Methods 0.000 claims abstract description 12
- 239000005350 fused silica glass Substances 0.000 claims abstract description 11
- 239000010431 corundum Substances 0.000 claims abstract description 7
- 239000011230 binding agent Substances 0.000 claims abstract description 5
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 claims abstract description 5
- 238000000465 moulding Methods 0.000 claims abstract description 5
- 229910052863 mullite Inorganic materials 0.000 claims abstract description 5
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- 238000002156 mixing Methods 0.000 claims abstract description 4
- 239000002270 dispersing agent Substances 0.000 claims description 14
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 9
- 238000011049 filling Methods 0.000 claims description 9
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- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 5
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- 229910052906 cristobalite Inorganic materials 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
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- 239000000377 silicon dioxide Substances 0.000 claims description 4
- 235000019832 sodium triphosphate Nutrition 0.000 claims description 4
- 229910052682 stishovite Inorganic materials 0.000 claims description 4
- 229910052905 tridymite Inorganic materials 0.000 claims description 4
- 239000002202 Polyethylene glycol Substances 0.000 claims description 3
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 3
- 229920001223 polyethylene glycol Polymers 0.000 claims description 3
- 229910000323 aluminium silicate Inorganic materials 0.000 claims description 2
- 229910001570 bauxite Inorganic materials 0.000 claims description 2
- 239000006227 byproduct Substances 0.000 claims description 2
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 2
- 229920000058 polyacrylate Polymers 0.000 claims description 2
- 235000019982 sodium hexametaphosphate Nutrition 0.000 claims description 2
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 claims description 2
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims description 2
- 239000003245 coal Substances 0.000 claims 1
- 230000000630 rising effect Effects 0.000 claims 1
- 239000011819 refractory material Substances 0.000 abstract description 8
- 238000005266 casting Methods 0.000 abstract description 4
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- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
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- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 description 1
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Abstract
The invention relates to the field of refractory materials, and particularly provides a composition for preparing an aluminum water flow groove, which comprises the following components in percentage by weight: aggregate, filler, binder and dispersionAn agent; the aggregate is selected from one or more of fused quartz particles, fused corundum particles and fused mullite particles, the filler contains a first filler, the first filler is fly ash, and the content of the first filler in the total filler is 20-100 wt%; simultaneously, the aluminum water flow groove and the preparation method thereof are provided, and the method comprises the following steps: mixing the composition and water to obtain a casting material, injecting the casting material into a mold for molding, and then performing maintenance, demolding, drying and calcining; the composition is the composition of the invention; the volume density of the aluminum water flow groove is 1.5-2.5g/cm3The apparent porosity is 10-40%, the compressive strength is 20-80MPa, and the flexural strength is 5-20 MPa. The preparation method and the formula of the invention are environment-friendly and low in cost, not only effectively utilize industrial solid wastes, but also improve the service performance of the aluminum water flow tank.
Description
Technical Field
The invention belongs to the field of refractory materials, and particularly relates to a composition for preparing an aluminum water flow groove, an aluminum water flow groove and a preparation method thereof.
Background
The runner is a functional refractory material used for conveying molten aluminum water in the aluminum deep processing industry, has key functions of carrying, guiding, shunting, conveying, classification control and the like, and can realize the flow direction and flow rate control of high-temperature aluminum water by being matched with the flashboard for use so as to meet the production requirements of different aluminum alloy products. Because the launder is directly contacted with the aluminum liquid, the quality of the launder directly determines key links such as smooth production, guarantee of aluminum water cleanliness and the like.
The aluminum deep processing technology is gradually developed to a deep high-end product after being repeatedly innovated, and higher requirements are provided for the grade, cleanliness and crystal structure of the product. The launder refractory material in direct contact with the molten aluminum is also required to have higher performance, such as smooth surface, difficult wetting with the molten aluminum, better molten aluminum erosion resistance, excellent thermal shock stability, good heat preservation effect, light weight, convenient installation and the like. Since the launder is a consumable material in the deep processing production of aluminium and needs to be replaced regularly, it is required that the launder material has good properties and also a low price in order to reduce the production cost of aluminium alloys.
CN104475692A discloses a manufacturing process of an aluminum launder, which comprises the steps of uniformly stirring a quartz castable, pouring the quartz castable into a mold, vibrating and molding, curing and drying for 24 hours, demoulding, oxidizing for 5-6 days, then baking in a low-temperature kiln at the temperature of 350-450 ℃ for 2-4 days, spraying glaze on three inner sides of the launder after being taken out of the kiln, drying for 24 hours, then, entering a medium-temperature kiln, preserving heat for 30 minutes at the temperature of 760-800 ℃, cooling and then taking out of the kiln to obtain a launder product. As the surface of the runner prefabricated member is sprayed with a layer of glaze, the surface smoothness of the runner is good, flowing molten aluminum can quickly pass through the runner, the temperature drop in the molten aluminum flowing process is reduced, and the heat preservation performance is improved. However, the method has complex process and long production period, and the spraying of the glaze can further increase the cost of the product.
CN204035488U discloses a launder prefab for molten aluminum conveying, inlays a cermet refractory material impact block at the launder bottom to improve aluminium liquid scouring resistance, after the impact block wearing and tearing a certain degree simultaneously, can change again. However, the installation of the impact block will reduce the molten aluminum conveying volume of the launder, and the molten aluminum adhered to the surface or penetrated into the gaps will make the replacement operation of the impact block more difficult.
Disclosure of Invention
The invention aims to provide a low-cost preparation method of a high-performance aluminum water flow groove, so as to meet the use requirement of a flow groove refractory material in the aluminum deep processing industry.
To achieve the object of the present invention, according to a first aspect of the present invention, there is provided a composition for preparing an aluminum water runner, the composition comprising: aggregate, filling material, bonding agent and dispersing agent; the aggregate is selected from one or more of fused quartz particles, fused corundum particles and fused mullite particles, the filler contains a first filler, the first filler is coal ash, and the content of the first filler in the total filler is 20-100 wt%.
According to a second aspect of the invention, there is provided a method of making an aluminium launder, the method comprising: mixing the composition for preparing the aluminum launder with water to obtain a castable, injecting the castable into a mold for molding, and then performing maintenance, demolding, drying and calcining; the composition is the composition of the invention.
According to a third aspect of the invention, there is provided an aluminium launder made according to the method of the invention, wherein the bulk density is 1.5-2.5g/cm3The apparent porosity is 10-40%, the compressive strength is 20-80MPa, and the flexural strength is 5-20 MPa.
Typical properties of the aluminum launder product prepared using the present invention are as follows, with a bulk density of 1.5-2.5g/cm3The apparent porosity is 10-40%, the compressive strength is 20-80MPa, the breaking strength is 5-20MPa, and the thermal shock resistance, shock resistance and heat preservation are good.
The raw material formula of the invention is green and environment-friendly, has low cost and simple preparation process, and is convenient for large-scale industrial production.
The preparation method of the aluminum water flow groove is green and environment-friendly, has low cost, not only effectively utilizes industrial solid wastes, but also improves the service performance of the aluminum water flow groove.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 shows the effect of fly ash content (based on aggregate) on the bulk density and apparent porosity of the launder material.
Detailed Description
The following describes in detail specific embodiments of the present invention. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
As previously mentioned, the present invention provides a composition for preparing an aluminum water runner, the composition comprising: aggregate, filling material, bonding agent and dispersing agent; the aggregate is selected from one or more of fused quartz particles, fused corundum particles and fused mullite particles, the filler contains a first filler, the first filler is coal ash, and the content of the first filler in the total filler is 20-100 wt%.
According to a preferred embodiment of the present invention, the filler further comprises a second filler, the second filler can be selected conventionally in the field, and for the present invention, the second filler is preferably one or more of quartz powder, alumina powder, silica fume, bauxite and aluminosilicate.
According to a preferred embodiment of the invention, the first filler is present in an amount of 40 to 70% by weight of the total filler, and the second filler is present in an amount of 30 to 60% by weight of the total filler. Thereby further improving the performance of the aluminum water flow groove product.
According to a preferred embodiment of the invention, the median particle size of the second filler is less than 100 microns, preferably 20-75 microns and/or 0.5-10 microns. Thereby further improving the performance of the aluminum water flow groove product. Wherein, the preferable median particle size of the second filler is 20-75 microns and/or 0.5-10 microns means that the second filler is a filler with a median particle size of 20-75 microns or the second filler is a filler with a median particle size of 0.5-10 microns or the second filler is a mixture of a filler with a median particle size of 0.5-10 microns and a filler with a median particle size of 20-75 microns.
In the present invention, the median diameter refers to the diameter (particle diameter) corresponding to the cumulative percentage of particle size distribution of a particle sample of 50%, and its physical meaning is that the particle diameter is greater than 50% of the particles and less than 50% of the particles.
According to the invention, the fly ash is a coal-fired byproduct of a thermal power plant, namely fine particles obtained from combustion tail gas through dust collecting systems at all levels.
According to a preferred embodiment of the invention, the fly ash has a median particle size of 1 to 100 microns.
According to a preferred embodiment of the invention, the fly ash contains 30-65 wt.% SiO on a dry weight basis215-55% by weight of Al2O3And 1-20 wt% CaO.
According to a preferred embodiment of the invention, the aggregate has a median particle size of 0.1 to 5 mm.
According to a preferred embodiment of the invention, the weight ratio of aggregate to fly ash is 100: (1-90), preferably 100: (20-70); the dosage of the bonding agent is 2-30%, preferably 3-20% of the total weight of the aggregate and the filling material; the amount of the dispersing agent is less than 5 percent, preferably 0.3 to 5 percent of the total weight of the aggregate and the filling material. Thereby further improving the performance of the aluminum water flow groove.
FIG. 1 shows the influence of fly ash content (based on aggregate) on the bulk density and apparent porosity of a material for a launder product, wherein the raw material composition comprises 10kg of fused silica particles with a median particle size of 1-2mm, 5kg of fused silica particles with a median particle size of 0.5-1mm, 3kg of fused silica particles with a median particle size of 0.1-0.5mm, 6kg of silica fume with a median particle size of 60 microns and a median particle size of 0.8um, 1kg of refractory cement and 0.1kg of sodium tripolyphosphate, water is added into the mixture and the mixture is uniformly stirred, then the mixture is vibrated, poured and molded, the demolded preform is dried in an oven at 120 ℃ for 12h, then the preform is transferred into a calcining furnace, heated to 800 ℃ at a heating rate of 2 ℃/min, kept warm for 2h and naturally cooled, and thus the alumina launder product is obtained. As can be seen from fig. 1, the aluminum launder product prepared using the composition of the present invention also has excellent thermal insulation properties due to its lower density and higher porosity.
In the present invention, the kind of the binder can be selected from a wide range, and any binder conventionally used in the art can be used in the present invention, and according to a preferred embodiment of the present invention, the binder is cement and/or aluminum hydroxide.
In the present invention, the kind of the dispersing agent can be selected from a wide range, and any dispersing agent conventionally used in the art can be used in the present invention, and according to a preferred embodiment of the present invention, the dispersing agent is selected from one or more of sodium tripolyphosphate, sodium hexametaphosphate, polyethylene glycol, and polyacrylate.
The purpose of the invention can be achieved by using the composition of the invention to prepare the aluminum water flow groove, and aiming at the invention, the invention particularly provides a method for preparing the aluminum water flow groove, which comprises the following steps:
mixing the composition for preparing the aluminum launder with water to obtain a castable, injecting the castable into a mold for molding, and then performing maintenance, demolding, drying and calcining; the composition is the composition of the invention.
In the present invention, the curing, demolding, drying and calcining steps and conditions can be performed according to the conventional techniques in the art, and the present invention has no special requirements for this.
According to a preferred embodiment of the invention, the weight ratio of the composition to the water is (8-15): 1.
according to a preferred embodiment of the present invention, the temperature of calcination is 500-1000 ℃, preferably 700-900 ℃; preferably, the temperature rise rate of the calcination is less than 10 deg.C/min, more preferably from 2 deg.C/min to 8 deg.C/min.
According to a preferred embodiment of the invention, the calcination is carried out for a holding time of 1 to 5 hours.
According to a preferred embodiment of the invention, the process is carried out as follows:
(1) adding the weighed aggregate, the filler, the bonding agent, the dispersing agent and water into a mixer, and stirring the mixture at a high speed until a uniformly mixed castable is obtained;
(2) placing a pre-designed mould on a vibration platform, opening the vibration platform, pouring the casting material into the mould, and ensuring that the casting material has better fluidity in the mould and gas is sufficiently exhausted;
(3) curing and demolding the runner prefabricated part in the mold, for example, the curing and demolding are usually kept in a normal-temperature environment or a constant-temperature and constant-humidity box for 2-48h, so that the prefabricated part has enough strength and then is subjected to demolding treatment;
(4) drying the demolded prefabricated part, wherein the drying temperature is preferably 80-250 ℃;
(5) and finally, calcining the prefabricated member in a high-temperature furnace at the temperature of 500-1000 ℃, thereby obtaining the launder product with high strength, good thermal shock resistance and excellent molten aluminum corrosion resistance.
As described above, the present invention provides an aluminum launder prepared according to the method of the present invention, wherein the bulk density is 1.5-2.5g/cm3Preferably 1.8 to 2.1g/cm3(ii) a The apparent porosity is 10-40%, preferably 18-32%; the compressive strength is 20-80MPa, preferably 30-50 MPa; the breaking strength is 5-20MPa, preferably 6-15 MPa.
In the invention, the volume density is obtained by adopting a GB/T2997-2000 compact setting refractory product volume density, apparent porosity and vacuum porosity test method.
The apparent porosity is obtained by adopting GB/T2997-2000 compact setting refractory product volume density, apparent porosity and true porosity test methods.
The compressive strength is obtained by a GB/T50722008 refractory material normal temperature compressive strength test method.
The flexural strength is obtained by adopting a test method of the normal temperature flexural strength of the GB/T3001-2007 refractory material.
In the invention, the adopted fly ash comes from Shenhua quasi-Geer power plants.
The whole process is described in detail below by way of examples, but the scope of the claims of the present invention is not limited by these examples. Meanwhile, the embodiments only give some conditions for achieving the purpose, but do not mean that the conditions must be satisfied for achieving the purpose.
Example 1
Weighing fused stone with median particle size of 1-2mm10kg of quartz particles, 5kg of fused quartz particles with a median particle size of 0.5-1mm, 3kg of fused quartz particles with a median particle size of 0.1-0.5mm, 5kg of fly ash with a median particle size of 60um, 2.5kg of fly ash with a median particle size of 2um, 1kg of refractory cement, 0.1kg of dispersant sodium tripolyphosphate (number average molecular weight 368) and 2kg of water; the fly ash used contains 32 wt% of Al2O345% by weight of SiO2And 10 wt% CaO, the remainder being a small amount of Fe2O3、K2O、Na2O, MgO, etc. Adding the mixture into a stirrer, stirring at a rotating speed of 50rpm for 10min to form a uniformly mixed castable, placing a designed launder mould on a vibration platform, starting vibration, pouring the castable into the mould, continuing to vibrate for 5min to ensure that gas is completely removed, placing the mould at a normal temperature of 25 ℃ for 24h, then demoulding, drying the demoulded prefabricated part in a 120 ℃ oven for 12h, then transferring the prefabricated part into a calcining furnace, raising the temperature to 800 ℃ at a heating rate of 2 ℃/min, preserving the heat for 2h, and naturally cooling to obtain an aluminum launder product with the volume density of 1.8g/cm3The apparent porosity was 32%, the compressive strength was 30MPa, and the flexural strength was 6 MPa.
Example 2
Weighing 10kg of fused quartz particles with the median particle size of 1-2mm, 4kg of fused mullite particles with the median particle size of 0.5-1mm, 2kg of fused corundum particles with the median particle size of 0.1-0.5mm, 8kg of fly ash with the median particle size of 45um, 6kg of silica fume with the median particle size of 0.8um, 3kg of refractory cement, 0.3kg of polyethylene glycol (number average molecular weight 600) as a dispersant and 3kg of water, wherein the adopted fly ash contains 18 wt% of Al2O354% by weight of SiO2And 14% by weight of CaO, the remainder being a small amount of Fe2O3、K2O、Na2O, MgO, etc. Adding the mixture into a stirrer, stirring at 30rpm for 20min to form uniformly mixed castable, placing a designed launder mold on a vibration platform, starting vibration, pouring the castable into the mold, continuously vibrating for 10min to ensure complete gas removal, placing the mold in a constant temperature and humidity box, keeping for 12h in an environment with 60 ℃ and 50% humidity, demolding, and placing the demolded prefabricated part in an oven with 80 ℃ to obtain a prefabricated partDrying for 24h, transferring the prefabricated member into a calcining furnace, heating to 700 ℃ at the heating rate of 5 ℃/min, preserving heat for 4h, and naturally cooling to obtain an aluminum water flow groove product with the volume density of 2.1g/cm3The apparent porosity was 25%, the compressive strength was 45MPa, and the flexural strength was 12 MPa.
Example 3
Weighing 10kg of fused quartz particles with the median particle size of 3-5mm, 5kg of fused corundum particles with the median particle size of 1-2mm, 2.5kg of fused corundum particles with the median particle size of 0.3-0.8mm, 5kg of fly ash with the median particle size of 20 microns, 4kg of alumina micropowder with the median particle size of 8 microns, 3kg of fly ash with the median particle size of 2 microns, 4kg of refractory cement, 1.8kg of aluminum hydroxide, 1.4kg of sodium polyacrylate (number average molecular weight) as a dispersant and 4.5kg of water, wherein the adopted fly ash contains 48 wt% of Al2O341% by weight of SiO2And 5 wt% CaO, the remainder being a small amount of Fe2O3、K2O、Na2O, MgO, etc. Adding the mixture into a stirrer, stirring at the rotating speed of 80rpm for 30min to form a uniformly mixed castable, placing a designed launder mould on a vibration platform, starting vibration, pouring the castable into the mould, continuing vibration for 30min to ensure complete gas removal, placing the mould in a constant temperature and humidity box, keeping the temperature in an environment with the humidity of 80 ℃ and 30% for 12h, then demoulding, drying the demoulded prefabricated part in a drying oven with the temperature of 150 ℃ for 8h, then transferring the prefabricated part into a calcining furnace, raising the temperature to 900 ℃ at the heating rate of 8 ℃/min, preserving heat for 2h, and naturally cooling to obtain an aluminum water launder product with the volume density of 1.9g/cm3The apparent porosity was 18%, the compressive strength was 50MPa, and the flexural strength was 15 MPa.
The results of the embodiment show that the preparation method of the aluminum water flow groove is green and environment-friendly, has low cost, not only effectively utilizes industrial solid wastes, but also improves the service performance of the aluminum water flow groove.
The preferred embodiments of the present invention have been described in detail, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (11)
1. A composition for preparing an aluminum water flow groove, wherein the volume density of the aluminum water flow groove is 1.5-2.5g/cm3The apparent porosity is 10-40%, the compressive strength is 20-80MPa, the flexural strength is 5-20MPa, and the composition is characterized by comprising: aggregate, filling material, bonding agent and dispersing agent; the aggregate is selected from one or more of fused quartz particles, fused corundum particles and fused mullite particles, the filler contains a first filler, the first filler is fly ash, and the content of the first filler in the total filler is 20-100 wt%;
the binding agent is cement and/or aluminum hydroxide; the dispersing agent is selected from one or more of sodium tripolyphosphate, sodium hexametaphosphate, polyethylene glycol and polyacrylate;
wherein the weight ratio of the aggregate to the fly ash is 100: (1-90), the dosage of the bonding agent is 2-30% of the total weight of the aggregate and the filling material, and the dosage of the dispersing agent is less than 5% of the total weight of the aggregate and the filling material;
the median particle size of the aggregate is 0.1-5 mm.
2. The composition according to claim 1, wherein the filler further comprises a second filler, and the second filler is one or more of quartz powder, alumina powder, silica fume, bauxite and aluminosilicate.
3. The composition as claimed in claim 2, wherein the first filler is present in an amount of 40 to 70% by weight of the total filler and the second filler is present in an amount of 30 to 60% by weight of the total filler.
4. The composition of claim 2 wherein the secondary filler has a median particle size of less than 100 microns.
5. The composition according to claim 2, wherein the secondary filler has a median particle size of 20 to 75 microns and/or 0.5 to 10 microns.
6. The composition of any one of claims 1-5, wherein the fly ash is a coal fired by-product of a thermal power plant, having a median particle size of 1-100 microns; based on dry weight, the fly ash contains 30-65 wt% of SiO215-55% by weight of Al2O3And 1-20 wt% CaO.
7. The composition according to any one of claims 1 to 5, wherein the weight ratio of aggregate to fly ash is 100: (20-70), the dosage of the bonding agent is 3-20% of the total weight of the aggregate and the filling material, and the dosage of the dispersing agent is 0.3-5% of the total weight of the aggregate and the filling material.
8. A method of making an aluminum launder, the method comprising:
mixing the composition for preparing the aluminum launder with water to obtain a castable, injecting the castable into a mold for molding, and then performing maintenance, demolding, drying and calcining; characterized in that the composition is a composition according to any one of claims 1 to 7.
9. The method of claim 8, wherein the weight ratio of composition to water is (8-15): 1, the calcining temperature is 500-1000 ℃, the temperature rising rate of the calcining is less than 10 ℃/min, and the calcining heat preservation time is 1-5 h.
10. The method as claimed in claim 9, wherein the temperature of the calcination is 700-900 ℃ and the temperature rise rate of the calcination is 2-8 ℃/min.
11. The aluminum launder prepared by the method of any one of claims 8 to 10 wherein the bulk density is 1.5 to 2.5g/cm3The apparent porosity is 10-40%, the compressive strength is 20-80MPa, and the flexural strength is 5-20 MPa.
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| CN110317049A (en) * | 2019-07-05 | 2019-10-11 | 中钢集团洛阳耐火材料研究院有限公司 | A kind of siliceous prefabricated component of low-porosity and preparation method |
| 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 |
| 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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| CN103159490B (en) * | 2013-04-11 | 2014-08-13 | 孙志红 | Swinging chute working lining castable of composite material and preparation method of castable |
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