CN117303873A - Impervious composite brick for aluminum water bags of platform bag transfer trolley and preparation method of impervious composite brick - Google Patents
Impervious composite brick for aluminum water bags of platform bag transfer trolley and preparation method of impervious composite brick Download PDFInfo
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- CN117303873A CN117303873A CN202311607532.7A CN202311607532A CN117303873A CN 117303873 A CN117303873 A CN 117303873A CN 202311607532 A CN202311607532 A CN 202311607532A CN 117303873 A CN117303873 A CN 117303873A
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- dihydrogen phosphate
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- 239000011449 brick Substances 0.000 title claims abstract description 107
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 62
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 62
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 45
- 239000002131 composite material Substances 0.000 title claims abstract description 33
- 238000002360 preparation method Methods 0.000 title abstract description 7
- 239000007788 liquid Substances 0.000 claims abstract description 69
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 34
- 239000010431 corundum Substances 0.000 claims abstract description 34
- 239000000843 powder Substances 0.000 claims abstract description 34
- 150000003839 salts Chemical class 0.000 claims abstract description 27
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000007767 bonding agent Substances 0.000 claims abstract description 20
- 239000004927 clay Substances 0.000 claims abstract description 18
- 238000002386 leaching Methods 0.000 claims abstract description 12
- 238000010304 firing Methods 0.000 claims abstract description 10
- 159000000003 magnesium salts Chemical class 0.000 claims abstract description 8
- RGPUVZXXZFNFBF-UHFFFAOYSA-K diphosphonooxyalumanyl dihydrogen phosphate Chemical compound [Al+3].OP(O)([O-])=O.OP(O)([O-])=O.OP(O)([O-])=O RGPUVZXXZFNFBF-UHFFFAOYSA-K 0.000 claims description 49
- 238000002156 mixing Methods 0.000 claims description 30
- 238000003756 stirring Methods 0.000 claims description 30
- 229920001353 Dextrin Polymers 0.000 claims description 28
- 239000004375 Dextrin Substances 0.000 claims description 28
- 235000019425 dextrin Nutrition 0.000 claims description 28
- 239000007787 solid Substances 0.000 claims description 19
- 239000012267 brine Substances 0.000 claims description 15
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims description 15
- 238000003825 pressing Methods 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 9
- 230000005484 gravity Effects 0.000 claims description 6
- 238000011068 loading method Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 239000012466 permeate Substances 0.000 claims description 6
- 239000000047 product Substances 0.000 claims description 6
- 238000002791 soaking Methods 0.000 claims description 6
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 5
- 239000004411 aluminium Substances 0.000 claims description 4
- 241001408630 Chloroclystis Species 0.000 claims description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-M dihydrogenphosphate Chemical compound OP(O)([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-M 0.000 claims 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 abstract description 8
- 229910010271 silicon carbide Inorganic materials 0.000 abstract description 8
- 238000004140 cleaning Methods 0.000 abstract description 5
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 230000001681 protective effect Effects 0.000 abstract description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract 2
- 229910052710 silicon Inorganic materials 0.000 abstract 2
- 239000010703 silicon Substances 0.000 abstract 2
- 238000009413 insulation Methods 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 11
- 239000011230 binding agent Substances 0.000 description 10
- 229910052581 Si3N4 Inorganic materials 0.000 description 6
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 239000011819 refractory material Substances 0.000 description 5
- 230000003487 anti-permeability effect Effects 0.000 description 3
- 238000003723 Smelting Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
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- 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
- C04B35/10—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 aluminium oxide
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- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
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- C04B35/6306—Binders based on phosphoric acids or phosphates
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Abstract
An impervious composite brick for an aluminum water drum of a ladle transfer trolley and a preparation method thereof comprise the following components in parts by mass: 30-40 parts of 3-1mm compact corundum, 15-25 parts of 1-0mm compact corundum, 20-30 parts of alumina superfine powder, 5-10 parts of clay and 4-6 parts of bonding agent. According to the invention, the specific mass proportion is matched with a unique firing temperature curve, so that the porosity is greatly reduced, the compressive strength and the aluminum liquid permeation resistance of the brick body are remarkably improved, the salt water prepared by magnesium salt is used for carrying out high-pressure vacuum salt leaching treatment on the brick body, so that a secondary protective film is formed on the surface of the brick body, the adhesion of aluminum water can be effectively prevented, the aluminum permeation resistance is better, the surface is less prone to sticking aluminum, the number of times of cleaning per year is reduced by 60% compared with that of the traditional high-alumina brick, meanwhile, the heat conductivity is lower compared with that of the silicon nitride-combined silicon carbide brick, the heat insulation performance is good, and compared with that of the silicon nitride-combined silicon carbide brick, the heating energy consumption is also greatly reduced, and the manufacturing cost is lower.
Description
Technical Field
The invention relates to the technical field of refractory materials, in particular to an impervious composite brick for an aluminum water drum of a ladle transfer trolley and a preparation method thereof.
Background
The ladle transfer car (buggy ladle) is applied to high-temperature molten aluminum transfer, and high Wen Lvye (generally about 950 ℃) produced by an electrolytic aluminum factory is sucked into the molten aluminum ladle and transported to a smelting furnace factory through a special vehicle, and directly poured into an aluminum melting furnace for smelting. Therefore, the refractory material of the aluminum water drum of the ladle transfer trolley needs to resist penetration of aluminum liquid and slag erosion, so that the service life of the transfer ladle is prolonged; the aluminum liquid is not adhered, so that the reduction of the actual use volume is avoided, and the aluminum output is ensured; the high-temperature strength is high, and the impact of high-temperature molten aluminum can be resisted; the heat conductivity is lower, the heat loss is less in the transportation process, and the safety and energy conservation of aluminum water transportation are satisfied.
At present, most of the bricklaying refractory materials of the aluminum water bags of the platform bag transfer trolley are high-alumina bricks or clay bricks, when in transfer, the aluminum liquid is bonded with the brick surface seriously, after multiple use, the brick surface is bonded with the aluminum liquid, so that the use volume of the aluminum water bags is reduced, the aluminum output of single transfer is further reduced, meanwhile, the aluminum liquid bonded with the brick surface is very difficult to clean, the labor intensity of workers is increased, the working efficiency is reduced, and the working layer is easily broken down by cleaning by using an air pick, so that the service life is short. Some manufacturers choose to use silicon nitride and silicon carbide bricks as the optimization choice, but because the bricks have higher heat conductivity, the temperature drop speed in the aluminum liquid transferring process is high, so that the aluminum water needs to be heated for the second time when being sent to a refining furnace from an aluminum water drum of a ladle transfer trolley, the material unit price of the silicon nitride and silicon carbide bricks is far higher than that of the traditional high-alumina bricks, and the transfer is required to be reheated, so that the aluminum liquid transferring trolley is not more cost-effective from the aspect of production cost.
Aiming at the technical problems, the market is in need of an aluminum water drum refractory material for a trolley transfer trolley, which can make up the defects of the traditional high-alumina bricks in performance and has comprehensive use cost without being too expensive.
Disclosure of Invention
In order to overcome the defects in the background technology, the invention discloses an impervious composite brick for an aluminum water drum of a platform-package transfer trolley and a preparation method thereof.
In order to achieve the aim of the invention, the invention adopts the following technical scheme:
an impervious composite brick for an aluminum water drum of a ladle transfer trolley comprises the following components in parts by mass: 30-40 parts of 3-1mm compact corundum, 15-25 parts of 1-0mm compact corundum, 20-30 parts of alumina superfine powder, 5-10 parts of clay and 4-6 parts of bonding agent.
The mass ratio of the dextrin liquid, the aluminum dihydrogen phosphate liquid and the aluminum dihydrogen phosphate solid powder of the bonding agent is 1 (1.5-2) to 1.5-2.
The density of the dextrin liquid is 1.05-1.15g/cm 3 The content of aluminum dihydrogen phosphate in the aluminum dihydrogen phosphate liquid is more than 85 percent, and the density of the liquid is 1.4-1.52g/cm 3 。
A preparation method of an impervious composite brick for an aluminum water drum of a ladle transfer trolley comprises the following steps:
firstly, adding 3-1mm compact corundum and 1-0mm compact corundum, stirring and mixing for 3-6 minutes, adding aluminum dihydrogen phosphate liquid, stirring and mixing for 3-5 minutes, adding aluminum dihydrogen phosphate solid powder, aluminum oxide superfine powder and clay, stirring and mixing for 4-8 minutes, and finally adding dextrin liquid, stirring and mixing for 3-5 minutes;
step two, pressing green bricks: adopting double-sided pressurization and repeated exhaust stamping to form green brick pugs;
firing the pressed green bricks; after high-temperature sintering, cooling and then carrying out a salt leaching process;
and fourthly, carrying out salt leaching treatment on the baked green bricks, carrying out high-pressure vacuum salt leaching treatment, and drying after salt leaching treatment is completed to obtain finished products.
The firing temperature profile is: the temperature is raised to room temperature-150 ℃, the temperature is raised for 10-12 hours, the holding time is 8-10 hours, the temperature is raised to 150-300 ℃, the temperature is raised for 5-7.5 hours, the holding time is 4-6 hours, the temperature is raised to 300-600 ℃, the temperature is raised for 10-12 hours, the holding time is 4-6 hours, the temperature is raised to 600-1200 ℃, the temperature is raised to 20-24 hours, the holding time is 4-6 hours, the temperature is raised to 1200-1350 ℃, the temperature is raised to 7-9 hours, and the holding time is 8-10 hours.
The salt soaking treatment comprises adding salt and water into a container, wherein the specific gravity of the salt water is 1.01-1.09g/cm 3 Uniformly stirring by using a stirrer within the range; loading the sintered impervious composite bricks on a tray, placing the tray into a vacuum tank, vacuumizing to reach the pressure of less than 0.08MPa, and keeping the pressure for 0.5 hour; injecting prepared brine into the vacuum tank, wherein the brine is required to permeate the upper surface of the brick, and keeping for 0.5 hour; opening the vacuum tank, taking out the bricks, and putting the bricks into a dryer for drying at 160-200 ℃.
The salt used in the salt soaking treatment is MgSO 4 With MgCl 2 Magnesium salt formulated at a mass ratio of 1:2.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
according to the invention, the specific proportion of the binding agent is matched with a unique firing temperature curve, so that the porosity is greatly reduced, and the compressive strength and the aluminum liquid permeation resistance of the brick body are remarkably improved.
The invention uses MgSO 4 With MgCl 2 The salt water prepared by the magnesium salt prepared in the mass ratio of 1:2 is subjected to high-pressure vacuum salt leaching treatment, so that a secondary protective film is formed on the surface of the brick body, and the adhesion of aluminum water can be effectively prevented.
Compared with the traditional high-alumina brick used as the refractory material of the aluminum water drum of the platform package transfer trolley, the anti-permeability composite brick has better anti-permeability, and the anti-permeability composite brick has the advantages that the surface is less prone to sticking aluminum, and in actual use, the common high-alumina brick has serious sticking aluminum and needs to be cleaned for 8-12 times per month; after the impervious composite bricks are used, cleaning is needed for 3-4 times in each month, so that the workload is greatly reduced, the service efficiency of the trolley is improved, the aluminum sticking amount is reduced, the aluminum liquid loss is reduced, and the transportation cost is reduced; meanwhile, compared with the silicon nitride combined silicon carbide brick, the heat-conducting coefficient is lower, the heat-insulating performance is good, and compared with the silicon nitride combined silicon carbide brick, the heating energy consumption is also greatly reduced, and the manufacturing cost is also cheaper.
Detailed Description
An impervious composite brick for an aluminum water drum of a ladle transfer trolley comprises the following components in parts by mass: 30-40 parts of 3-1mm compact corundum, 15-25 parts of 1-0mm compact corundum, 20-30 parts of alumina superfine powder, 5-10 parts of clay and 4-6 parts of bonding agent.
The binding agent is dextrin liquid, aluminum dihydrogen phosphate liquid and aluminum dihydrogen phosphate solid powder, wherein the density of the dextrin liquid is 1.05-1.15g/cm 3 The density of the aluminum dihydrogen phosphate liquid is 1.4-1.52g/cm 3 The aluminum dihydrogen phosphate content in the aluminum dihydrogen phosphate liquid is more than 85 percent.
The mass ratio of the dextrin liquid, the aluminum dihydrogen phosphate liquid and the aluminum dihydrogen phosphate solid powder of the bonding agent is 1 (1.5-2) to 1.5-2.
A preparation method of an impervious composite brick for an aluminum water drum of a ladle transfer trolley comprises the following steps:
firstly, mixing 30-40 parts of 3-1mm compact corundum, 15-25 parts of 1-0mm compact corundum, 20-30 parts of alumina superfine powder, 5-10 parts of clay and 4-6 parts of bonding agent, firstly adding 3-1mm compact corundum and 1-0mm compact corundum, stirring and mixing for 3-6 minutes, then adding aluminum dihydrogen phosphate liquid, stirring and mixing for 3-5 minutes, then adding aluminum dihydrogen phosphate solid powder, alumina superfine powder and clay, stirring and mixing for 4-8 minutes, and finally adding dextrin liquid, stirring and mixing for 3-5 minutes;
step two, pressing the green bricks, namely pressing the green bricks by double-sided pressurization and repeated exhausting stamping to densify the green brick mud materials:
firing the pressed green bricks, wherein the temperature curve is as follows: the temperature is raised to room temperature-150 ℃, the temperature is raised for 10-12 hours, the holding time is 8-10 hours, the temperature is raised to 150-300 ℃, the temperature is raised for 5-7.5 hours, the holding time is 4-6 hours, the temperature is raised to 300-600 ℃, the temperature is raised for 10-12 hours, the holding time is 4-6 hours, the temperature is raised to 600-1200 ℃, the temperature is raised to 20-24 hours, the holding time is 4-6 hours, the temperature is raised to 1200-1350 ℃, the temperature is raised to 7-9 hours, and the holding time is 8-10 hours;
step four, soaking the baked green bricks with salt, adding magnesium salt and water into a container, wherein the specific gravity of the salt water is as follows1.01-1.09g/cm 3 Uniformly stirring by using a stirrer within the range; loading the sintered impervious composite bricks on a tray, placing the tray into a vacuum tank, vacuumizing to reach the pressure of less than 0.08MPa, and keeping the pressure for 0.5 hour; injecting prepared brine into the vacuum tank, wherein the brine is required to permeate the upper surface of the brick, and keeping for 0.5 hour; opening the vacuum tank, taking out the bricks, putting the bricks into a dryer for drying at 160-200 ℃ to obtain a finished product.
Example 1, an impermeable composite brick for a ladle transfer car aluminium water ladle:
step one, mixing 30 parts of compact corundum with the mass ratio of 3-1mm, 15 parts of compact corundum with the mass ratio of 1-0mm, 20 parts of alumina superfine powder, 5 parts of clay and 4 parts of bonding agent, wherein the bonding agent consists of dextrin liquid, aluminum dihydrogen phosphate liquid and aluminum dihydrogen phosphate solid powder with the mass ratio of 1:1.5:1.5, and the density of the dextrin liquid is 1.05g/cm 3 The density of the aluminum dihydrogen phosphate liquid is 1.4g/cm 3 Firstly adding 3-1mm compact corundum and 1-0mm compact corundum, stirring and mixing for 3 minutes, then adding aluminum dihydrogen phosphate liquid, stirring and mixing for 3 minutes, then adding aluminum dihydrogen phosphate solid powder, aluminum oxide superfine powder and clay, stirring and mixing for 4 minutes, and finally adding dextrin liquid, stirring and mixing for 3 minutes;
step two, pressing the green bricks, namely pressing the green bricks by double-sided pressurization and repeated exhausting stamping to densify the green brick mud materials:
firing the pressed green bricks, wherein the temperature curve is as follows: the temperature is raised to room temperature-150 ℃, the temperature is raised for 10 hours, the holding time is 8 hours, the temperature is raised to 150-300 ℃, the temperature is raised for 5 hours, the holding time is 4 hours, the temperature is raised to 300-600 ℃, the temperature is raised for 10 hours, the holding time is 4 hours, the temperature is raised to 600-1200 ℃, the temperature is raised to 20 hours, the holding time is 4 hours, the temperature is raised to 1200-1350 ℃, the temperature is raised for 7 hours, and the holding time is 8 hours;
step four, the baked green bricks are subjected to salt leaching treatment, and MgSO is added into a container 4 With MgCl 2 Magnesium salt and water prepared in a mass ratio of 1:2, the specific gravity of brine being 1.01g/cm 3 Stirring uniformly by using a stirrer; loading the sintered impervious composite bricks onto a tray, placing into a vacuum tank, vacuumizing to a pressure less than 0.08MPa, and maintaining 05 hours; injecting prepared brine into the vacuum tank, wherein the brine is required to permeate the upper surface of the brick, and keeping for 0.5 hour; opening the vacuum tank, taking out the bricks, putting the bricks into a dryer for drying at 160 ℃ to obtain a finished product.
Example 2, an impermeable composite brick for a ladle transfer car aluminium water ladle:
step one, mixing 35 parts of compact corundum with the mass ratio of 3-1mm, 20 parts of compact corundum with the mass ratio of 1-0mm, 25 parts of alumina superfine powder, 7 parts of clay and 5 parts of bonding agent, wherein the bonding agent consists of dextrin liquid, aluminum dihydrogen phosphate liquid and aluminum dihydrogen phosphate solid powder with the mass ratio of 1:1.5:2, and the density of the dextrin liquid is 1.1g/cm 3 The density of the aluminum dihydrogen phosphate liquid is 1.45g/cm 3 Firstly adding 3-1mm compact corundum and 1-0mm compact corundum, stirring and mixing for 5 minutes, then adding aluminum dihydrogen phosphate liquid, stirring and mixing for 4 minutes, then adding aluminum dihydrogen phosphate solid powder, aluminum oxide superfine powder and clay, stirring and mixing for 6 minutes, and finally adding dextrin liquid, stirring and mixing for 4 minutes;
step two, pressing the green bricks, namely pressing the green bricks by double-sided pressurization and repeated exhausting stamping to densify the green brick mud materials:
firing the pressed green bricks, wherein the temperature curve is as follows: the temperature is raised to room temperature-150 ℃, the temperature is raised for 11 hours, the holding time is 9 hours, the temperature is raised to 150-300 ℃, the temperature is raised for 6.5 hours, the holding time is 5 hours, the temperature is raised to 300-600 ℃, the temperature is raised for 11 hours, the holding time is 5 hours, the temperature is raised to 600-1200 ℃, the temperature is raised to 22 hours, the holding time is 5 hours, the temperature is raised to 1200-1350 ℃, the temperature is raised for 8 hours, and the holding time is 9 hours;
step four, the baked green bricks are subjected to salt leaching treatment, and MgSO is added into a container 4 With MgCl 2 Magnesium salt and water prepared in a mass ratio of 1:2, the specific gravity of brine being 1.05g/cm 3 Stirring uniformly by using a stirrer; loading the sintered impervious composite bricks on a tray, placing the tray into a vacuum tank, vacuumizing to reach the pressure of less than 0.08MPa, and keeping the pressure for 0.5 hour; injecting prepared brine into the vacuum tank, wherein the brine is required to permeate the upper surface of the brick, and keeping for 0.5 hour; opening the vacuum tank, taking out the bricks, putting the bricks into a dryer for drying at a drying temperature of 18 DEG CAnd (5) at 0 ℃ to obtain a finished product.
Example 3, an impermeable composite brick for a ladle transfer car aluminium water ladle:
step one, mixing 40 parts of compact corundum with the mass ratio of 3-1mm, 25 parts of compact corundum with the mass ratio of 1-0mm, 30 parts of alumina superfine powder, 10 parts of clay and 6 parts of bonding agent, wherein the bonding agent consists of dextrin liquid, aluminum dihydrogen phosphate liquid and aluminum dihydrogen phosphate solid powder with the mass ratio of 1:2:2, and the density of the dextrin liquid is 1.15g/cm 3 The density of the aluminum dihydrogen phosphate liquid is 1.5g/cm 3 Firstly adding 3-1mm compact corundum and 1-0mm compact corundum, stirring and mixing for 6 minutes, then adding aluminum dihydrogen phosphate liquid, stirring and mixing for 5 minutes, then adding aluminum dihydrogen phosphate solid powder, aluminum oxide superfine powder and clay, stirring and mixing for 8 minutes, and finally adding dextrin liquid, stirring and mixing for 5 minutes;
step two, pressing the green bricks, namely pressing the green bricks by double-sided pressurization and repeated exhausting stamping to densify the green brick mud materials:
firing the pressed green bricks, wherein the temperature curve is as follows: the temperature is raised to room temperature-150 ℃, the temperature is raised for 12 hours, the holding time is 10 hours, the temperature is raised to 150-300 ℃, the temperature is raised for 7.5 hours, the holding time is 6 hours, the temperature is raised to 300-600 ℃, the temperature is raised for 12 hours, the holding time is 6 hours, the temperature is raised to 600-1200 ℃, the temperature is raised to 24 hours, the holding time is 6 hours, the temperature is raised to 1200-1350 ℃, the temperature is raised for 9 hours, and the holding time is 10 hours;
step four, the baked green bricks are subjected to salt leaching treatment, and MgSO is added into a container 4 With MgCl 2 Magnesium salt and water prepared in a mass ratio of 1:2, the specific gravity of brine being 1.09g/cm 3 Stirring uniformly by using a stirrer; loading the sintered impervious composite bricks on a tray, placing the tray into a vacuum tank, vacuumizing to reach the pressure of less than 0.08MPa, and keeping the pressure for 0.5 hour; injecting prepared brine into the vacuum tank, wherein the brine is required to permeate the upper surface of the brick, and keeping for 0.5 hour; opening the vacuum tank, taking out the bricks, putting the bricks into a dryer for drying at 200 ℃ to obtain a finished product.
Comparative example 1 the binding agent was replaced by a liquid consisting entirely of dextrin on the basis of example 1.
Comparative example 2 the binder was replaced by a liquid consisting entirely of aluminium dihydrogen phosphate on the basis of example 1.
Comparative example 3 the binder was replaced by a powder consisting entirely of aluminum dihydrogen phosphate solid on the basis of example 1.
Comparative example 4 the binding agent was replaced with a 1:1:1 dextrin liquid, an aluminum dihydrogen phosphate solid on the basis of example 1.
Comparative example 5 the binding agent was replaced with a 1:3:3 dextrin liquid, an aluminum dihydrogen phosphate solid on the basis of example 1.
Comparative example 6 conventional high alumina bricks for use in aluminum water bags.
Comparative example 7 silicon nitride bonded silicon carbide brick for aluminum water package was known.
As can be seen from table 1, the technical scheme of example 1 significantly exceeds that of comparative examples 1-3 using one binder alone in terms of key indexes of porosity, aluminum permeation resistance, compressive strength and aluminum adhesion, and the binder matched in a specific ratio range of the invention obtains better aluminum liquid permeation resistance, and meanwhile, the aluminum liquid hardly adheres to brick bodies, so that the use requirement of the aluminum water trolley can be met.
With reference to table 2, examples 1-3 are more suitable for operation of aluminum water trolley than ordinary high alumina bricks and silicon nitride combined silicon carbide bricks, and not only meet the operation requirement in terms of performance, but also have advantages in terms of comprehensive cost; as can also be seen by comparing the data of comparative examples 2-3 in table 1 with comparative example 6 in table 2, the present application treated by salt leaching outperforms the conventional high alumina bricks currently used in aluminum water bags, even with a single binder.
From table 3, it can be found that in the running period of 12 days, the running time of the ladle car built by the impervious composite bricks is obviously prolonged, the number of times of cleaning the transfer ladle and the cleaning labor intensity impervious composite bricks after running the same period can be greatly reduced compared with the common high-alumina bricks, the running rate of the ladle is improved, the total aluminum output in one period is obviously increased in example 1 compared with that in comparative example 6, the aluminum output of a single ladle is increased, the productivity is improved, the energy consumption is reduced, the carbon emission is reduced, and the running cost is effectively reduced.
The invention has not been described in detail in the prior art, and it is apparent to those skilled in the art that the invention is not limited to the details of the above-described exemplary embodiments, but that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics thereof; the present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, and all changes coming within the meaning and range of equivalency are intended to be embraced therein.
Claims (7)
1. A impervious composite brick for platform package transfer car (buggy) aluminium water drum, characterized by: the composite material comprises the following components in parts by mass: 30-40 parts of 3-1mm compact corundum, 15-25 parts of 1-0mm compact corundum, 20-30 parts of alumina superfine powder, 5-10 parts of clay and 4-6 parts of bonding agent, wherein the bonding agent comprises dextrin liquid, aluminum dihydrogen phosphate liquid and aluminum dihydrogen phosphate solid powder in a mass ratio of 1 (1.5-2), and the density of the dextrin liquid is 1.05-1.15g/cm 3 The content of aluminum dihydrogen phosphate in the aluminum dihydrogen phosphate liquid is more than 85 percent, and the density of the aluminum dihydrogen phosphate liquid is 1.4-1.52g/cm 3 。
2. The impervious composite brick for the aluminum water bags of the trolley bags of claim 1, which is characterized in that: mixing 30 parts of 3-1mm compact corundum, 15 parts of 1-0mm compact corundum, 20 parts of alumina superfine powder, 5 parts of clay and 4 parts of bonding agent, wherein the bonding agent comprises dextrin liquid and aluminum dihydrogen phosphate liquid in a mass ratio of 1:1.5:1.5Aluminum dihydrogen phosphate solid powder, and the density of the dextrin liquid is 1.05g/cm 3 The density of the aluminum dihydrogen phosphate liquid is 1.4g/cm 3 。
3. The impervious composite brick for the aluminum water bags of the trolley bags of claim 1, which is characterized in that: 35 parts of 3-1mm compact corundum, 20 parts of 1-0mm compact corundum, 25 parts of alumina ultrafine powder, 7 parts of clay and 5 parts of bonding agent are mixed, wherein the bonding agent consists of dextrin liquid, aluminum dihydrogen phosphate liquid and aluminum dihydrogen phosphate solid powder in a mass ratio of 1:1.5:2, and the density of the dextrin liquid is 1.1g/cm 3 The density of the aluminum dihydrogen phosphate liquid is 1.45g/cm 3 。
4. The impervious composite brick for the aluminum water bags of the trolley bags of claim 1, which is characterized in that: mixing 40 parts of 3-1mm compact corundum, 25 parts of 1-0mm compact corundum, 30 parts of alumina superfine powder, 10 parts of clay and 6 parts of bonding agent, wherein the bonding agent consists of dextrin liquid, aluminum dihydrogen phosphate liquid and aluminum dihydrogen phosphate solid powder in a mass ratio of 1:2:2, and the density of the dextrin liquid is 1.15g/cm 3 The density of the aluminum dihydrogen phosphate liquid is 1.5g/cm 3 。
5. The method for preparing the impervious composite brick for the aluminum water drum of the ladle transfer trolley, which is disclosed in claim 1, is characterized in that: firstly, adding 3-1mm compact corundum and 1-0mm compact corundum, stirring and mixing for 3-6 minutes, adding aluminum dihydrogen phosphate liquid, stirring and mixing for 3-5 minutes, adding aluminum dihydrogen phosphate solid powder, aluminum oxide superfine powder and clay, stirring and mixing for 4-8 minutes, and finally adding dextrin liquid, stirring and mixing for 3-5 minutes; step two, pressing green bricks: adopting double-sided pressurization and repeated exhaust stamping to form green brick pugs; firing the pressed green bricks; step four, carrying out salt leaching treatment on the baked green bricks, wherein salt added in the salt leaching treatment is MgSO (MgSO) 4 With MgCl 2 And (3) preparing magnesium salt in a mass ratio of 1:2, soaking salt in high-pressure vacuum, and drying after the salt soaking is finished to obtain a finished product.
6. The method for preparing the impervious composite brick for the aluminum water drum of the ladle transfer trolley, which is disclosed in claim 5, is characterized in that: the firing temperature profile is as follows: the temperature is between room temperature and 150 ℃, the temperature is between 10 and 12 hours, and the time is between 8 and 10 hours; the temperature is raised to 150-300 ℃, the temperature is raised for 5-7.5 hours, and the time is kept for 4-6 hours; the temperature is raised to 300-600 ℃, the temperature is raised for 10-12 hours, and the holding time is 4-6 hours; the temperature is raised to 600-1200 ℃, the temperature is raised for 20-24 hours, and the holding time is 4-6 hours; the temperature is raised to 1200-1350 ℃, the temperature is raised for 7-9 hours, and the holding time is 8-10 hours.
7. The method for preparing the impervious composite brick for the aluminum water drum of the ladle transfer trolley, which is disclosed in claim 5, is characterized in that: the salt soaking treatment comprises adding salt and water into a container, wherein the specific gravity of the salt water is 1.01-1.09g/cm 3 Uniformly stirring by using a stirrer within the range; loading the sintered impervious composite bricks on a tray, placing the tray into a vacuum tank, vacuumizing to reach the pressure of less than 0.08MPa, and keeping the pressure for 0.5 hour; injecting prepared brine into the vacuum tank, wherein the brine is required to permeate the upper surface of the brick, and keeping for 0.5 hour; opening the vacuum tank, taking out the bricks, and putting the bricks into a dryer for drying at 160-200 ℃.
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