CN117865658B - Aluminum phosphate combined casting material for blast furnace tapping channel - Google Patents
Aluminum phosphate combined casting material for blast furnace tapping channel Download PDFInfo
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- 238000010079 rubber tapping Methods 0.000 title claims abstract description 40
- ILRRQNADMUWWFW-UHFFFAOYSA-K aluminium phosphate Chemical compound O1[Al]2OP1(=O)O2 ILRRQNADMUWWFW-UHFFFAOYSA-K 0.000 title claims abstract description 33
- 239000000463 material Substances 0.000 title description 13
- 238000005266 casting Methods 0.000 title description 10
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 186
- 239000010431 corundum Substances 0.000 claims abstract description 186
- 229910052751 metal Inorganic materials 0.000 claims abstract description 87
- 239000002184 metal Substances 0.000 claims abstract description 87
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims abstract description 68
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 65
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 58
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 57
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 57
- 239000000843 powder Substances 0.000 claims abstract description 46
- 229910052580 B4C Inorganic materials 0.000 claims abstract description 39
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 claims abstract description 39
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims abstract description 38
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 35
- 239000000835 fiber Substances 0.000 claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000007767 bonding agent Substances 0.000 claims abstract description 12
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 7
- 239000002245 particle Substances 0.000 claims description 255
- RGPUVZXXZFNFBF-UHFFFAOYSA-K diphosphonooxyalumanyl dihydrogen phosphate Chemical group [Al+3].OP(O)([O-])=O.OP(O)([O-])=O.OP(O)([O-])=O RGPUVZXXZFNFBF-UHFFFAOYSA-K 0.000 claims description 17
- 239000011230 binding agent Substances 0.000 claims description 9
- -1 al 2O3≥90wt% Inorganic materials 0.000 claims description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 3
- 230000035939 shock Effects 0.000 abstract description 17
- 239000000919 ceramic Substances 0.000 abstract description 6
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 30
- 229910052726 zirconium Inorganic materials 0.000 description 30
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 24
- 239000002893 slag Substances 0.000 description 22
- 239000002694 phosphate binding agent Substances 0.000 description 19
- 235000019832 sodium triphosphate Nutrition 0.000 description 16
- 230000000052 comparative effect Effects 0.000 description 14
- 229910052742 iron Inorganic materials 0.000 description 12
- 230000003628 erosive effect Effects 0.000 description 11
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 9
- 229910052782 aluminium Inorganic materials 0.000 description 7
- 229910052799 carbon Inorganic materials 0.000 description 7
- 230000003647 oxidation Effects 0.000 description 7
- 238000007254 oxidation reaction Methods 0.000 description 7
- 230000003064 anti-oxidating effect Effects 0.000 description 6
- 230000003078 antioxidant effect Effects 0.000 description 6
- 239000003575 carbonaceous material Substances 0.000 description 6
- 239000002131 composite material Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000003963 antioxidant agent Substances 0.000 description 5
- 239000004568 cement Substances 0.000 description 5
- 229920000388 Polyphosphate Polymers 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 239000001205 polyphosphate Substances 0.000 description 4
- 235000011176 polyphosphates Nutrition 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 229910052661 anorthite Inorganic materials 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- LHJQIRIGXXHNLA-UHFFFAOYSA-N calcium peroxide Chemical compound [Ca+2].[O-][O-] LHJQIRIGXXHNLA-UHFFFAOYSA-N 0.000 description 2
- 235000019402 calcium peroxide Nutrition 0.000 description 2
- GWWPLLOVYSCJIO-UHFFFAOYSA-N dialuminum;calcium;disilicate Chemical compound [Al+3].[Al+3].[Ca+2].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-] GWWPLLOVYSCJIO-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 229910052596 spinel Inorganic materials 0.000 description 2
- 239000011029 spinel Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- HMDDXIMCDZRSNE-UHFFFAOYSA-N [C].[Si] Chemical compound [C].[Si] HMDDXIMCDZRSNE-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 239000011863 silicon-based powder Substances 0.000 description 1
- 238000004901 spalling Methods 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
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Abstract
The invention provides an aluminophosphate combined blast furnace tapping channel castable, which comprises the following components in percentage by mass: 42% -58% of dense corundum, 12% -23% of zirconia corundum, 15% -24% of silicon carbide, 3% -8% of alpha alumina, 2% -8% of rho alumina, 0.2% -3% of coke powder, 0.01% -0.3% of explosion-proof fiber, 0.1% -0.8% of water reducer, 0.2% -1.8% of boron carbide, 0.1% -3% of metal aluminum powder, 0.2% -3% of metal vanadium powder and 2% -8% of aluminum phosphate bonding agent. According to the aluminum phosphate combined blast furnace tapping channel castable, metal vanadium powder is added, the metal vanadium powder, the metal aluminum powder and the coke powder can react to generate new phase ceramic V 2 AlC, a new phase can generate a net structure, and aggregate and fine powder are better interweaved and combined together, so that the overall strength performance and thermal shock resistance of the castable are improved.
Description
Technical Field
The invention belongs to the technical field of refractory materials, and particularly relates to an aluminophosphate combined blast furnace tapping channel castable.
Background
The blast furnace tapping channel is a channel for guiding high-temperature molten iron and slag in the blast furnace, the basic structure comprises a main tapping channel, an iron channel (branch channel), a slag channel and the like, and the refractory material for the blast furnace tapping channel has higher requirements on the thermal shock resistance and the thermal spalling resistance of the material due to the periodical impact of the molten iron and the slag, and in order to improve the slag erosion resistance and the thermal shock resistance of the main tapping channel of the blast furnace tapping channel, a carbon material is generally added into the castable of the main channel, and the carbon material is not easy to be infiltrated by slag iron, so that the slag erosion resistance and the thermal shock resistance of the castable of the main channel can be improved.
At present, the casting materials of the tapping runners of the blast furnace are all made of Al 2O3 -SiC-C materials, and the Chinese patent document with the publication number of CN111675545A discloses a casting material of the tapping runners of the blast furnace, which comprises 15-20 parts of brown alumina particles; 10-16 parts of compact corundum particles; 10-15 parts of silicon carbide particles; 1-4 parts of carbon material; 2-6 parts of metal silicon powder; 3-5 parts of silicon-carbon micropowder; 10-18 parts of alumina micropowder; 2-8 parts of alumina hollow spheres; 5-10 parts of high-alumina fine powder; 2-4 parts of high alumina cement; 1-2 parts of a composite water reducing agent; 0.4-1 part of additive; 0.3-0.5 part of explosion-proof fiber. The casting material of the tapping channel is added with carbon materials to improve the slag erosion resistance and the thermal shock stability of the casting material. However, after the blast furnace tapping is completed, most of the working lining is exposed to air, the carbon material is very easy to oxidize, and the strength of the castable is reduced due to the addition of the carbon material, so that the castable is damaged in an accelerated manner.
Disclosure of Invention
The technical problem solved by the invention is to provide an aluminum phosphate combined blast furnace tapping channel castable, which is added with metal vanadium powder, the metal aluminum powder and the coke powder can react to generate new phase ceramic V 2 AlC, the new phase can generate a net structure, and aggregate and fine powder are better interweaved and combined together, so that the overall strength performance and thermal shock resistance of the castable are improved.
In order to solve the problems, the invention provides an aluminophosphate combined blast furnace tapping channel castable, which comprises the following components in percentage by mass:
42% -58% of dense corundum, 12% -23% of zirconia corundum, 15% -24% of silicon carbide, 3% -8% of alpha alumina, 2% -8% of rho alumina, 0.2% -3% of coke powder, 0.01% -0.3% of explosion-proof fiber, 0.1% -0.8% of water reducer, 0.2% -1.8% of boron carbide, 0.1% -3% of metal aluminum powder, 0.2% -3% of metal vanadium powder and 2% -8% of aluminum phosphate bonding agent.
Preferably, the composition comprises the following components in percentage by mass:
45% -53% of dense corundum, 15% -21% of zirconia corundum, 18% -22% of silicon carbide, 4% -6% of alpha alumina, 3% -6% of rho alumina, 0.5% -2% of coke powder, 0.01% -0.1% of explosion-proof fiber, 0.3% -0.6% of water reducer, 0.5% -1.5% of boron carbide, 0.5% -1% of metal aluminum powder, 0.5% -2% of metal vanadium powder and 4% -6% of aluminum phosphate bonding agent.
Preferably, the mass ratio of the coke powder to the metal aluminum powder to the metal vanadium powder is 1:0.3-1:0.5-2.
Preferably, the dense corundum comprises dense corundum particles with the granularity more than 0.074mm and dense corundum fine powder with the granularity less than or equal to 0.074 mm; the zirconia corundum comprises zirconia corundum particles with the granularity of more than 0.074 mm; the silicon carbide comprises silicon carbide particles with the granularity more than 0.074mm and silicon carbide fine powder with the granularity less than or equal to 0.074 mm; the total mass of the compact corundum particles, the zirconia corundum particles and the silicon carbide particles is 60% -65% of the blast furnace tapping channel castable.
Preferably, the mass ratio of the boron carbide to the metal aluminum powder is 1-3:1.
Preferably, the dense corundum comprises particles with the particle size less than or equal to 15mm and more than 8mm, particles with the particle size less than or equal to 8mm and more than 5mm, particles with the particle size less than or equal to 5mm and more than 3mm, particles with the particle size less than or equal to 3mm and more than 1mm and fine powder with the particle size less than or equal to 0.074 mm; the mass ratio of the particles with the particle size less than or equal to 15mm and more than 8mm, the particles with the particle size less than or equal to 8mm and more than 5mm, the particles with the particle size less than or equal to 5mm and more than 3mm, the particles with the particle size less than or equal to 3mm and more than 1mm and the fine powder with the particle size less than or equal to 0.074mm is 6-10:12-17:6-10:5-12:8-13;
The zirconia corundum comprises particles with the granularity of less than or equal to 3mm and more than 1mm and particles with the granularity of less than or equal to 1mm and more than 0.074 mm; and the mass ratio of the particles with the particle size of less than or equal to 3mm and more than 1mm to the particles with the particle size of less than or equal to 1mm and more than 0.074mm is 8-14:5-8;
The silicon carbide comprises particles with the particle size less than or equal to 1mm and more than 0.074mm and fine powder with the particle size less than or equal to 0.074 mm; and the mass ratio of the particles with the particle size less than or equal to 1mm and more than 0.074mm to the fine powder with the particle size less than or equal to 0.074mm is 8-10:10-12.
Preferably, in the zirconia corundum, al 2O3≥90wt%、Fe2O3 is less than or equal to 1.3wt%, and the particle volume density of the zirconia corundum is more than or equal to 3.5g/cm 3.
Preferably, in the dense corundum, al 2O3≥70wt%、ZrO2 is less than or equal to 20wt%, and the particle volume density of the dense corundum is more than or equal to 4g/cm 3.
Preferably, the particle size of the alpha alumina is less than or equal to 1 μm;
the granularity of rho alumina is less than or equal to 1 mu m;
The granularity of the boron carbide is less than or equal to 0.045mm;
The granularity of the metal aluminum powder is less than or equal to 0.074mm;
The granularity of the metal vanadium powder is less than or equal to 0.045mm.
Preferably, the aluminophosphate binder is aluminum dihydrogen phosphate.
Compared with the prior art, the invention has the following beneficial effects:
The aluminum phosphate combined blast furnace tapping channel castable disclosed by the invention has the advantages that the main raw materials are compact corundum and zirconia corundum, the compact corundum has low pores and high hardness, and the slag iron penetration resistance of the castable can be improved; the zirconia corundum has low air hole, high hardness, contains zirconium and has strong slag iron corrosion resistance; the alpha aluminum oxide and the rho aluminum oxide are in micron-sized and small in granularity, so that the fluidity of the castable can be improved, and the high-temperature bonding strength of the castable can be improved; carbon in the coke powder is not easy to be wetted by molten iron and slag, the thermal expansion coefficient is small, the thermal conductivity is high, and the thermal shock stability and the slag erosion resistance of the castable can be improved; the aluminum phosphate binder is adopted to replace the traditional cement binder, the aluminum phosphate binder can form chain aluminum polyphosphate and branched aluminum polyphosphate, gel with a net structure has certain mechanical strength, the gel exists between aggregates, the aggregates can be mutually bonded together, and the aluminum phosphate is dehydrated and polymerized to be connected with the continuous increase of the sintering temperature to finally form the net-shaped aluminum spinel, so that the aluminum phosphate gel has good strength performance; rho alumina may also react with small amounts of water in the aluminophosphate binder to form a gel, thereby improving the early release strength of the castable.
Because the aluminum phosphate bonding agent is adopted in the aluminum phosphate bonding blast furnace tapping channel castable, compared with cement bonding agent and liquid sol bonding agent, the water content in the aluminum phosphate bonding agent is very small, so in the aluminum phosphate bonding agent, the added metal aluminum powder is not mostly consumed by reaction with water, but is used as a composite antioxidant together with boron carbide, the two can react with oxygen in preference to carbon, thereby preventing the carbon in the castable from being oxidized, the boron carbide has good antioxidation effect at 800-1000 ℃, the aluminum powder has good antioxidation effect at more than 1000 ℃, and the two can be used as the composite antioxidant, so that the castable can be ensured to have good antioxidation effect in all temperature ranges.
In order to improve the thermal shock stability and slag erosion resistance of the castable, the coke powder is added, but the strength performance of the castable is reduced and the wear resistance is reduced due to the addition of the coke powder, so that the metal vanadium powder is further added, and the metal vanadium powder, the metal aluminum powder and the coke powder can react to generate new phase ceramic V 2 AlC at high temperature, and the phase has good strength performance, thermal shock resistance and oxidation resistance.
The aluminum phosphate combined blast furnace tapping channel castable does not contain silicon dioxide and calcium dioxide, and can avoid generating anorthite and other low-melting substances, thereby improving the capability of the castable for resisting slag iron corrosion.
Detailed Description
The technical solutions of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The embodiment of the invention provides an aluminophosphate combined blast furnace tapping channel castable, which comprises the following components in percentage by mass:
42% -58% of dense corundum, 12% -23% of zirconia corundum, 15% -24% of silicon carbide, 3% -8% of alpha alumina, 2% -8% of rho alumina, 0.2% -3% of coke powder, 0.01% -0.3% of explosion-proof fiber, 0.1% -0.8% of water reducer, 0.2% -1.8% of boron carbide, 0.1% -3% of metal aluminum powder, 0.2% -3% of metal vanadium powder and 2% -8% of aluminum phosphate bonding agent.
The aluminum phosphate combined blast furnace tapping channel castable disclosed by the embodiment of the invention adopts compact corundum and zirconia corundum as main raw materials, has low compact corundum pores and high hardness, and can improve the slag iron penetration resistance of the castable; the zirconia corundum has low air hole, high hardness, contains zirconium and has strong slag iron corrosion resistance; the alpha aluminum oxide and the rho aluminum oxide are in micron-sized and small in granularity, so that the fluidity of the castable can be improved, and the high-temperature bonding strength of the castable can be improved; carbon in the coke powder is not easy to be wetted by molten iron and slag, the thermal expansion coefficient is small, the thermal conductivity is high, and the thermal shock stability and the slag erosion resistance of the castable can be improved; the aluminum phosphate binder is adopted to replace the traditional cement binder, the aluminum phosphate binder can form chain aluminum polyphosphate and branched aluminum polyphosphate, gel with a net structure has certain mechanical strength, the gel exists between aggregates, the aggregates can be mutually bonded together, and the aluminum phosphate is dehydrated and polymerized to be connected with the continuous increase of the sintering temperature to finally form the net-shaped aluminum spinel, so that the aluminum phosphate gel has good strength performance; rho alumina may also react with small amounts of water in the aluminophosphate binder to form a gel, thereby improving the early release strength of the castable.
According to the aluminum phosphate combined blast furnace tapping channel castable, as the aluminum phosphate binder is adopted, compared with the cement binder and the liquid sol binder, the water content in the aluminum phosphate binder is very small, so that the added metal aluminum powder is not mostly consumed in reaction with water, but is used as a composite antioxidant together with boron carbide, and the added metal aluminum powder and the boron carbide can react with oxygen in preference to carbon, so that the carbon in the castable is prevented from being oxidized, the boron carbide has good antioxidation effect at 800-1000 ℃ and the aluminum powder has good antioxidation effect at more than 1000 ℃ and can be used as the composite antioxidant, and the castable can be guaranteed to have good antioxidation effect in all temperature ranges.
In order to improve the thermal shock stability and slag erosion resistance of the castable, the coke powder is added, but the strength performance of the castable is reduced and the wear resistance is reduced due to the addition of the coke powder, so that the metal vanadium powder is further added, the metal vanadium powder, the metal aluminum powder and the coke powder can react to generate new phase ceramic V 2 AlC at high temperature, the phase has good strength performance, thermal shock resistance and oxidation resistance, and more importantly, the generated new phase can generate a net structure, and the aggregate and the fine powder are better interweaved and combined together, so that the integral strength performance and thermal shock resistance of the castable are improved.
The aluminum phosphate combined blast furnace tapping channel castable disclosed by the embodiment of the invention does not contain silicon dioxide and calcium dioxide, and can avoid generating anorthite and other low-melting substances, so that the slag iron erosion resistance of the castable is improved.
In some embodiments, preferably, the aluminophosphate bonded blast furnace tap channel castable comprises the following components in mass percent:
45% -53% of dense corundum, 15% -21% of zirconia corundum, 18% -22% of silicon carbide, 4% -6% of alpha alumina, 3% -6% of rho alumina, 0.5% -2% of coke powder, 0.01% -0.1% of explosion-proof fiber, 0.3% -0.6% of water reducer, 0.5% -1.5% of boron carbide, 0.5% -1% of metal aluminum powder, 0.5% -2% of metal vanadium powder and 4% -6% of phosphate bonding agent.
In the preferred mass percentage range, the obtained blast furnace tapping channel castable has better comprehensive properties such as high-temperature strength performance, thermal shock resistance performance, oxidation resistance performance and the like.
The generation of a proper amount of new phase ceramic V 2 AlC can improve the comprehensive performance of the castable, and the generation of excessive V 2 AlC can lead the material to crack due to excessive expansion of the new phase, so that the strength of the castable is reduced. On the other hand, the existence of the coke powder can improve the thermal shock stability and slag erosion resistance of the castable, and the metal aluminum powder can improve the oxidation resistance of the castable. Therefore, the V 2 AlC generated by the reaction of the coke powder, the metal aluminum powder and the metal vanadium powder is not as good as the V 2 AlC, but a certain amount of unreacted coke powder and metal aluminum powder is reserved under a proper proportion. Preferably, the mass ratio of the coke powder to the metal aluminum powder to the metal vanadium powder is 1:0.3-1:0.5-2. In this ratio range, the overall properties of the resulting castable are better.
Because the generation of the new phase ceramic V 2 AlC can generate certain volume expansion, and the proper amount of V 2 AlC can improve the performance of the castable, in order to prevent cracks from generating due to the excessive volume expansion of the castable, the invention further regulates the proportion between the aggregate and the fine powder, so that the castable generates a small amount of shrinkage, is matched with the volume expansion generated by V 2 AlC, ensures that the volume expansion of the castable is proper, and improves the performance of the castable. Preferably, the dense corundum comprises dense corundum particles with the granularity more than 0.074mm and dense corundum fine powder with the granularity less than or equal to 0.074 mm; the zirconia corundum comprises zirconia corundum particles with the granularity of more than 0.074 mm; the silicon carbide comprises silicon carbide particles with the granularity more than 0.074mm and silicon carbide fine powder with the granularity less than or equal to 0.074 mm; the total mass of the compact corundum particles, the zirconia corundum particles and the silicon carbide particles is 60% -65% of the blast furnace tapping channel castable.
The boron carbide and the aluminum powder are used as a composite antioxidant together to prevent carbon in the castable from being oxidized, and the boron carbide and the aluminum powder have better antioxidant effect in different temperature ranges. Preferably, the mass ratio of the boron carbide to the metal aluminum powder is 1-3:1. The oxidation resistance of the runner castable can be best by adopting the proportion within the range.
In some embodiments, the dense corundum comprises particles having a particle size of 15mm or less and > 8mm, particles having a particle size of 8mm or less and > 5mm, particles having a particle size of 5mm or less and > 3mm, particles having a particle size of 3mm mm or less and > 1mm, and fine powder having a particle size of 0.074mm or less; the mass ratio of the particles with the particle size less than or equal to 15mm and more than 8mm, the particles with the particle size less than or equal to 8mm and more than 5mm, the particles with the particle size less than or equal to 5mm and more than 3mm, the particles with the particle size less than or equal to 3mm and more than 1mm and the fine powder with the particle size less than or equal to 0.074mm is 6-10:12-17:6-10:5-12:8-13.
In some embodiments, the zirconia corundum includes particles having a particle size of 3mm or less and > 1mm and particles having a particle size of 1mm or less and > 0.074 mm; and the mass ratio of the particles with the particle size less than or equal to 3mm and more than 1mm to the particles with the particle size less than or equal to 1mm and more than 0.074mm is 8-14:5-8.
In some embodiments, the silicon carbide comprises particles having a particle size of 1.ltoreq. 1mm and > 0.074mm and fines having a particle size of 0.074mm or less; and the mass ratio of the particles with the particle size less than or equal to 1mm and more than 0.074mm to the fine powder with the particle size less than or equal to 0.074mm is 8-10:10-12.
In some embodiments, al 2O3≥90wt%、Fe2O3 is less than or equal to 1.3wt% and the grain volume density of the zirconia corundum is more than or equal to 3.5g/cm 3.
In some embodiments, al 2O3≥70wt%、ZrO2 is less than or equal to 20wt% in the dense corundum, and the particle volume density of the dense corundum is more than or equal to 4g/cm 3.
In some embodiments, the alpha alumina has a particle size of 1 μm or less.
In some embodiments, the ρ alumina has a particle size of 1 μm or less.
In some embodiments, the boron carbide has a particle size of 0.045mm or less.
In some embodiments, the particle size of the metallic aluminum powder is less than or equal to 0.074mm.
In some embodiments, the metal vanadium powder has a particle size of 0.045mm or less.
In some embodiments, the phosphate binder is aluminum dihydrogen phosphate.
Example 1
The aluminum phosphate combined blast furnace tapping channel castable comprises the following components in percentage by mass:
The aluminum oxide powder comprises 8% of dense corundum particles with the granularity of less than or equal to 15mm and more than 8mm, 15% of dense corundum particles with the granularity of less than or equal to 8mm and more than 5mm, 8% of dense corundum particles with the granularity of less than or equal to 5mm and more than 3mm, 9% of dense corundum particles with the granularity of less than or equal to 3mm and more than 1mm, 10.42% of dense corundum fine powder with the granularity of less than or equal to 0.074mm, 10% of zirconium corundum particles with the granularity of less than or equal to 3mm and more than 1mm, 7% of zirconium corundum particles with the granularity of less than or equal to 1.1 mm and more than 0.074mm, 8% of silicon carbide particles with the granularity of less than or equal to 1mm and more than 0.074mm, 12% of silicon carbide fine powder with the granularity of less than or equal to 0.074mm, 5% of alpha alumina with the granularity of less than or equal to 1 mu m, 4% of rho alumina with the granularity of less than or equal to 1 mu m, 1% of coke powder, 0.08% of organic fiber, 0.5% of sodium tripolyphosphate, 1% of boron carbide with the granularity of less than or equal to 0.045mm of boron carbide with the granularity of less than or equal to 0.074mm of metal aluminum powder, 0.5%, less than 5% of granularity of less than 5%, less than 5% of granularity of 0.5mm, 5% of granularity of the granularity of 5, less% of 5, 5.
Example 2
The aluminum phosphate combined blast furnace tapping channel castable comprises the following components in percentage by mass:
The aluminum dihydrogen phosphate binder is composed of 8% of dense corundum particles with the granularity of less than or equal to 15mm and more than 8mm, 15% of dense corundum particles with the granularity of less than or equal to 8mm and more than 5mm, 8% of dense corundum particles with the granularity of less than or equal to 5mm and more than 3mm, 9% of dense corundum particles with the granularity of less than or equal to 3mm and more than 1mm, 9.92% of dense corundum fine powder with the granularity of less than or equal to 0.074mm, 10% of zirconium corundum particles with the granularity of less than or equal to 3mm and more than 1mm, 7% of zirconium corundum particles with the granularity of less than or equal to 1. 1mm and more than 0.074mm, 8% of silicon carbide particles with the granularity of less than or equal to 1mm and more than 0.074mm, 12% of silicon carbide fine powder with the granularity of less than or equal to 0.074mm, 5% of alpha alumina with the granularity of less than or equal to 1 mu m, 4% of rho alumina with the granularity of 1 mu m, 1% of coke powder, 0.08% of organic fiber, 0.5% of sodium tripolyphosphate, 1% of boron carbide with the granularity of less than or equal to 0.045mm of granularity of 0.5 mm.
Example 3
The aluminum phosphate combined blast furnace tapping channel castable comprises the following components in percentage by mass:
The aluminum dihydrogen phosphate binder is prepared from dense corundum particles with the granularity of less than or equal to 15mm and more than 8mm, dense corundum particles with the granularity of less than or equal to 8mm and more than 5mm, dense corundum particles with the granularity of less than or equal to 5mm and more than 3mm, dense corundum particles with the granularity of less than or equal to 3mm and more than 1mm, dense corundum fine powder with the granularity of less than or equal to 0.074mm, 9.42%, zirconium corundum particles with the granularity of less than or equal to 3mm and more than 1mm, zirconium corundum particles with the granularity of less than or equal to 1. 1mm and more than 0.074mm, silicon carbide particles with the granularity of less than or equal to 1mm and more than 0.074mm, silicon carbide fine powder with the granularity of less than or equal to 0.074mm, alpha alumina with the granularity of less than or equal to 1 mu m, rho alumina with the granularity of less than or equal to 1 mu m, coke powder with the granularity of 1%, organic fiber of 0.08%, sodium tripolyphosphate, boron carbide with the granularity of less than or equal to 0.045mm, boron carbide with the granularity of less than or equal to 0.0.074 mm, aluminum powder with the granularity of 0.5%, vanadium metal powder with the granularity of less than 5%, and aluminum dihydrogen phosphate with the additive of 5%.
Example 4
The aluminum phosphate combined blast furnace tapping channel castable comprises the following components in percentage by mass:
The aluminum dihydrogen phosphate binder is composed of 8% of dense corundum particles with the granularity of less than or equal to 15mm and more than 8mm, 15% of dense corundum particles with the granularity of less than or equal to 8mm and more than 5mm, 8% of dense corundum particles with the granularity of less than or equal to 5mm and more than 3mm, 9% of dense corundum particles with the granularity of less than or equal to 3mm and more than 1mm, 8.92% of dense corundum fine powder with the granularity of less than or equal to 0.074mm, 10% of zirconium corundum particles with the granularity of less than or equal to 3mm and more than 1mm, 7% of zirconium corundum particles with the granularity of less than or equal to 1.1 mm and more than 0.074mm, 8% of silicon carbide particles with the granularity of less than or equal to 1mm and more than 0.074mm, 12% of silicon carbide fine powder with the granularity of less than or equal to 1 mu m, 5% of alpha alumina with the granularity of less than or equal to 1 mu m, 4% of rho alumina powder with the granularity of 1 mu m, 0.08% of coke powder, 0.08% of organic fiber, 0.5% of sodium tripolyphosphate, 1% of boron carbide with the granularity of less than or equal to 0.045 mm.
Example 5
The aluminum phosphate combined blast furnace tapping channel castable comprises the following components in percentage by mass:
The aluminum dihydrogen phosphate binder is composed of 8% of dense corundum particles with the granularity of less than or equal to 15mm and more than 8mm, 15% of dense corundum particles with the granularity of less than or equal to 8mm and more than 5mm, 8% of dense corundum particles with the granularity of less than or equal to 5mm and more than 3mm, 5% of dense corundum particles with the granularity of less than or equal to 3mm and more than 1mm, 10.42% of dense corundum fine powder with the granularity of less than or equal to 0.074mm, 14% of zirconium corundum particles with the granularity of less than or equal to 3mm and more than 1mm, 7% of zirconium corundum particles with the granularity of less than or equal to 1.1 mm and more than 0.074mm, 8% of silicon carbide particles with the granularity of less than or equal to 1mm and more than 0.074mm, 12% of silicon carbide fine powder with the granularity of less than or equal to 0.074mm, 5% of alpha alumina with the granularity of less than or equal to 1 mu m, 4% of rho alumina with the granularity of less than or equal to 1 mu m, 0.5% of coke powder, 0.08% of organic fiber, 0.5% of sodium tripolyphosphate, 1% of boron carbide with the granularity of less than or equal to less than or equal to 0.045mm of granularity of 0.0.0.074 mm of metal aluminum powder with the granularity.
Example 6
The aluminum phosphate combined blast furnace tapping channel castable comprises the following components in percentage by mass:
the aluminum dihydrogen phosphate binder is composed of 8% of dense corundum particles with the granularity of less than or equal to 15mm and more than 8mm, 15% of dense corundum particles with the granularity of less than or equal to 8mm and more than 5mm, 8% of dense corundum particles with the granularity of less than or equal to 5mm and more than 3mm, 5% of dense corundum particles with the granularity of less than or equal to 3mm and more than 1mm, 9.42% of dense corundum fine powder with the granularity of less than or equal to 0.074mm, 14% of zirconium corundum particles with the granularity of less than or equal to 3mm and more than 1mm, 7% of zirconium corundum particles with the granularity of less than or equal to 1. 1mm and more than 0.074mm, 8% of silicon carbide particles with the granularity of less than or equal to 1mm and more than 0.074mm, 12% of silicon carbide fine powder with the granularity of less than or equal to 0.074mm, 5% of alpha alumina with the granularity of less than or equal to 1 mu m, 4% of rho alumina with the granularity of less than or equal to 1 mu m, 1.5% of coke powder, 0.08% of organic fiber, 0.5% of sodium tripolyphosphate, 1.5% of boron carbide with the granularity of less than or equal to 0.045 mm.
Example 7
The aluminum phosphate combined blast furnace tapping channel castable comprises the following components in percentage by mass:
The aluminum dihydrogen phosphate binder is composed of 8% of dense corundum particles with the granularity of less than or equal to 15mm and more than 8mm, 15% of dense corundum particles with the granularity of less than or equal to 8mm and more than 5mm, 8% of dense corundum particles with the granularity of less than or equal to 5mm and more than 3mm, 9% of dense corundum particles with the granularity of less than or equal to 3mm and more than 1mm, 11.62% of dense corundum fine powder with the granularity of less than or equal to 0.074mm, 10% of zirconium corundum particles with the granularity of less than or equal to 3mm and more than 1mm, 5% of zirconium corundum particles with the granularity of less than or equal to 1.1 mm and more than 0.074mm, 10% of silicon carbide fine powder with the granularity of less than or equal to 1mm and more than 0.074mm, 5% of alpha alumina with the granularity of less than or equal to 1 mu m, 4% of rho alumina with the granularity of less than or equal to 1 mu m, 1% of coke powder, 0.08% of organic fiber, 0.5% of sodium tripolyphosphate, 1% of boron carbide with the granularity of less than or equal to 0.045mm, 0.8 mm of metal aluminum powder with the granularity of less than 8% of less than 8mm, and 5% of vanadium powder with the granularity of less than or equal to 5% of 5%.
Example 8
The aluminum phosphate combined blast furnace tapping channel castable comprises the following components in percentage by mass:
The aluminum oxide powder comprises 8% of dense corundum particles with the granularity of less than or equal to 15mm and more than 8mm, 15% of dense corundum particles with the granularity of less than or equal to 8mm and more than 5mm, 8% of dense corundum particles with the granularity of less than or equal to 5mm and more than 3mm, 9% of dense corundum particles with the granularity of less than or equal to 3mm and more than 1mm, 11.42% of dense corundum fine powder with the granularity of less than or equal to 0.074mm, 10% of zirconium corundum particles with the granularity of less than or equal to 3mm and more than 1mm, 5% of zirconium corundum particles with the granularity of less than or equal to 1mm and more than 0.074mm, 10% of silicon carbide fine powder with the granularity of less than or equal to 1. 1mm and more than 0.074mm, 5% of alpha alumina with the granularity of less than or equal to 1 mu m, 4% of rho alumina with the granularity of less than or equal to 1 mu m, 1% of coke powder, 0.08% of organic fiber, 0.5% of sodium tripolyphosphate, 1% of boron carbide with the granularity of less than or equal to 0.045mm, 1% of metal aluminum powder with the granularity of less than or equal to 0.074mm, 1% of metal aluminum powder with the granularity of less than or equal to 0.045mm, and aluminum phosphate binder.
Example 9
The aluminum phosphate combined blast furnace tapping channel castable comprises the following components in percentage by mass:
The aluminum dihydrogen phosphate binder is composed of 8% of dense corundum particles with the granularity of less than or equal to 15mm and more than 8mm, 15% of dense corundum particles with the granularity of less than or equal to 8mm and more than 5mm, 8% of dense corundum particles with the granularity of less than or equal to 5mm and more than 3mm, 9% of dense corundum particles with the granularity of less than or equal to 3mm and more than 1mm, 10.22% of dense corundum fine powder with the granularity of less than or equal to 0.074mm, 10% of zirconium corundum particles with the granularity of less than or equal to 3mm and more than 1mm, 7% of zirconium corundum particles with the granularity of less than or equal to 1.1 mm and more than 0.074mm, 8% of silicon carbide particles with the granularity of less than or equal to 1mm and more than 0.074mm, 12% of silicon carbide fine powder with the granularity of less than or equal to 0.074mm, 5% of alpha alumina with the granularity of less than or equal to 1 mu m, 4% of rho alumina with the granularity of 1 mu m, 1% of coke powder, 0.08% of organic fiber, 0.5% of sodium tripolyphosphate, 1% of boron carbide with the granularity of less than or equal to 0.045mm of granularity of 0.2% of metal aluminum powder with the granularity of less than or less than 2 mm.
Example 10
The aluminum phosphate combined blast furnace tapping channel castable comprises the following components in percentage by mass:
The aluminum dihydrogen phosphate binder is composed of 8% of dense corundum particles with the granularity of less than or equal to 15mm and more than 8mm, 15% of dense corundum particles with the granularity of less than or equal to 8mm and more than 5mm, 8% of dense corundum particles with the granularity of less than or equal to 5mm and more than 3mm, 9% of dense corundum particles with the granularity of less than or equal to 3mm and more than 1mm, 8.92% of dense corundum fine powder with the granularity of less than or equal to 0.074mm, 10% of zirconium corundum particles with the granularity of less than or equal to 3mm and more than 1mm, 7% of zirconium corundum particles with the granularity of less than or equal to 1. 1mm and more than 0.074mm, 8% of silicon carbide particles with the granularity of less than or equal to 1mm and more than 0.074mm, 12% of silicon carbide fine powder with the granularity of less than or equal to 0.074mm, 5% of alpha alumina with the granularity of less than or equal to 1 mu m, 4% of rho alumina with the granularity of 1 mu m, 1% of coke powder, 0.08% of organic fiber, 0.5% of sodium tripolyphosphate, 1% of boron carbide with the granularity of less than or equal to 0.045mm of granularity of 0.5 mm.
Example 11
The aluminum phosphate combined blast furnace tapping channel castable comprises the following components in percentage by mass:
6% of dense corundum particles with the granularity of less than or equal to 15mm and more than 8mm, 13% of dense corundum particles with the granularity of less than or equal to 8mm and more than 5mm, 6% of dense corundum particles with the granularity of less than or equal to 5mm and more than 3mm, 7% of dense corundum particles with the granularity of less than or equal to 3mm and more than 1mm, 10% of dense corundum fine powder with the granularity of less than or equal to 0.074mm, 12% of zirconia corundum particles with the granularity of less than or equal to 3. 3mm and more than 1mm, 10% of zirconia corundum particles with the granularity of less than or equal to 1.1 mm and more than 0.074mm, 9% of silicon carbide fine powder with the granularity of less than or equal to 1.1 mm and more than 0.074mm, 3% of alpha alumina with the granularity of less than or equal to 1 mu m, 7% of rho alumina with the granularity of less than or equal to 1 mu m, 0.2% of coke powder, 0.1% of organic fiber, 0.1% of sodium tripolyphosphate, 1.5% of boron carbide with the granularity of less than or equal to 0.045mm, 1.9% of metal aluminum powder with the granularity of less than or equal to 0.074mm, 0.2% of metal aluminum powder with the granularity of less than or equal to 5mm, and 5% of aluminum dihydrogen phosphate binder.
Example 12
The aluminum phosphate combined blast furnace tapping channel castable comprises the following components in percentage by mass:
The aluminum dihydrogen phosphate binder is composed of 8% of dense corundum particles with the granularity of less than or equal to 15mm and more than 8mm, 15% of dense corundum particles with the granularity of less than or equal to 8mm and more than 5mm, 10% of dense corundum particles with the granularity of less than or equal to 5mm and more than 3mm, 10% of dense corundum particles with the granularity of less than or equal to 3mm and more than 1mm, 13% of dense corundum fine powder with the granularity of less than or equal to 0.074mm, 7% of zirconium corundum particles with the granularity of less than or equal to 3mm and more than 1mm, 6% of zirconium corundum particles with the granularity of less than or equal to 1mm and more than 0.074mm, 7% of silicon carbide particles with the granularity of less than or equal to 1mm and more than 0.074mm, 9% of silicon carbide fine powder with the granularity of less than or equal to 0.074mm, 6% of alpha alumina with the granularity of less than or equal to 1 mu m, 2% of rho alumina with the granularity of less than or equal to 1 mu m, 3% of coke powder, 0.1% of organic fiber, 0.6% of sodium tripolyphosphate, 0.2% of boron carbide with the granularity of less than or equal to 0.045mm of boron carbide, 0.2% with the granularity of less than or equal to 0.0.074 mm of metal aluminum powder, 3% of granularity, and 5% of vanadium powder with the granularity of less than or less than 5%.
Example 13
The aluminophosphate-bonded blast furnace runner castable of this example differs from example 2 in that: 0.76% of coke powder, 0.23% of metal aluminum powder and 1.51% of metal vanadium powder, namely the total amount of the coke powder, the metal aluminum powder and the metal vanadium powder is unchanged, and the mass ratio is 1:0.3:2.
Example 14
The aluminophosphate-bonded blast furnace runner castable of this example differs from example 2 in that: 1% of coke powder, 1% of metal aluminum powder and 0.5% of metal vanadium powder, namely the total amount of the coke powder, the metal aluminum powder and the metal vanadium powder is unchanged, and the mass ratio is 1:1:0.5.
Example 15
The aluminophosphate-bonded blast furnace runner castable of this example differs from example 2 in that: 0.72% of coke powder, 0.15% of metal aluminum powder and 1.63% of metal vanadium powder, namely the total amount of the coke powder, the metal aluminum powder and the metal vanadium powder is unchanged, and the mass ratio is 1:0.2:2.3.
Example 16
The aluminophosphate-bonded blast furnace runner castable of this example differs from example 2 in that: 1% of coke powder, 1.2% of metal aluminum powder and 0.3% of metal vanadium powder, namely the total amount of the coke powder, the metal aluminum powder and the metal vanadium powder is unchanged, and the mass ratio is 1:1.2:0.3.
Example 17
The aluminophosphate-bonded blast furnace runner castable of this example differs from example 2 in that:
The casting material comprises, by mass, 7% of dense corundum particles with the particle size of 15mm or less and more than 8mm, 15% of dense corundum particles with the particle size of 8mm or less and more than 5mm, 7% of dense corundum particles with the particle size of 5mm or less and more than 3mm, 8% of dense corundum particles with the particle size of 3mm and more than 1mm, 12.92% of dense corundum fine powder with the particle size of 0.074mm or less, 6% of silicon carbide particles with the particle size of 1.1 mm and more than 0.074mm, and 14% of silicon carbide fine powder with the particle size of 0.074mm or less, namely 60% of aggregate in the casting material.
Example 18
The aluminophosphate-bonded blast furnace runner castable of this example differs from example 2 in that:
6% of dense corundum particles with the granularity less than or equal to 15mm and more than 8mm, 15% of dense corundum particles with the granularity less than or equal to 8mm and more than 5mm, 6% of dense corundum particles with the granularity less than or equal to 5mm and more than 3mm, 8% of dense corundum particles with the granularity less than or equal to 3mm and more than 1mm, 14.92% of dense corundum fine powder with the granularity less than or equal to 0.074mm, 6% of silicon carbide particles with the granularity less than or equal to 1mm and more than 0.074mm, and 14% of silicon carbide fine powder with the granularity less than or equal to 0.074mm, namely 58% of aggregate in the casting material.
Example 19
The aluminophosphate-bonded blast furnace runner castable of this example differs from example 2 in that:
9% of dense corundum particles with the granularity of less than or equal to 15mm and more than 8mm, 15% of dense corundum particles with the granularity of less than or equal to 8mm and more than 5mm, 9% of dense corundum particles with the granularity of less than or equal to 5mm and more than 3mm, 9% of dense corundum particles with the granularity of less than or equal to 3mm and more than 1mm, 7.92% of dense corundum fine powder with the granularity of less than or equal to 0.074mm, 8% of silicon carbide particles with the granularity of less than or equal to 1mm and more than 0.074mm, and 12% of silicon carbide fine powder with the granularity of less than or equal to 0.074mm, namely 67% of aggregate in the casting material.
Comparative example 1
The aluminophosphate-bonded blast furnace tap channel castable of the comparative example comprises the following components in percentage by mass:
The aluminum oxide powder comprises 8% of dense corundum particles with the granularity of less than or equal to 15mm and more than 8mm, 15% of dense corundum particles with the granularity of less than or equal to 8mm and more than 5mm, 8% of dense corundum particles with the granularity of less than or equal to 5mm and more than 3mm, 9% of dense corundum particles with the granularity of less than or equal to 3mm and more than 1mm, 12.42% of dense corundum fine powder with the granularity of less than or equal to 0.074mm, 10% of zirconia corundum particles with the granularity of less than or equal to 3mm and more than 1mm, 7% of zirconia corundum particles with the granularity of less than or equal to 1mm and more than 0.074mm, 8% of silicon carbide particles with the granularity of less than or equal to 1mm and more than 0.074mm, 12% of silicon carbide fine powder with the granularity of less than or equal to 0.074mm, 5% of alpha alumina with the granularity of less than or equal to 1 mu m, 4% of rho alumina with the granularity of less than or equal to 1 mu m, 0.08% of organic fiber, 0.5% of sodium tripolyphosphate, 1% of boron carbide and 1% of aluminum dihydrogen phosphate bonding agent.
Comparative example 2
The aluminophosphate-bonded blast furnace tap channel castable of the comparative example comprises the following components in percentage by mass:
The aluminum dihydrogen phosphate binder is prepared from dense corundum particles with the granularity of less than or equal to 15mm and more than 8mm, dense corundum particles with the granularity of less than or equal to 8mm and more than 5mm, dense corundum particles with the granularity of less than or equal to 5mm and more than 3mm, dense corundum particles with the granularity of less than or equal to 3mm and more than 1mm, dense corundum fine powder with the granularity of less than or equal to 0.074mm, 11.42%, zirconium corundum particles with the granularity of less than or equal to 3mm and more than 1mm, zirconium corundum particles with the granularity of less than or equal to 1mm and more than 0.074mm, silicon carbide particles with the granularity of less than or equal to 1mm and more than 0.074mm, silicon carbide fine powder with the granularity of less than or equal to 0.074mm, alpha alumina with the granularity of less than or equal to 1 mu m, rho alumina with the granularity of less than or equal to 1 mu m, coke powder with the granularity of 1%, organic fiber of 0.08%, sodium tripolyphosphate, boron carbide with the granularity of less than or equal to 0.045mm, and the addition of 5%.
Comparative example 3
The aluminophosphate-bonded blast furnace tap channel castable of the comparative example comprises the following components in percentage by mass:
The aluminum oxide powder comprises 8% of dense corundum particles with the granularity of less than or equal to 15mm and more than 8mm, 15% of dense corundum particles with the granularity of less than or equal to 8mm and more than 5mm, 8% of dense corundum particles with the granularity of less than or equal to 5mm and more than 3mm, 9% of dense corundum particles with the granularity of less than or equal to 3mm and more than 1mm, 11.92% of dense corundum fine powder with the granularity of less than or equal to 0.074mm, 10% of zirconium corundum particles with the granularity of less than or equal to 3mm and more than 1mm, 7% of zirconium corundum particles with the granularity of less than or equal to 1mm and more than 0.074mm, 8% of silicon carbide particles with the granularity of less than or equal to 1mm and more than 0.074mm, 12% of silicon carbide fine powder with the granularity of less than or equal to 0.074mm, 5% of alpha alumina with the granularity of less than or equal to 1 mu m, 4% of rho alumina with the granularity of less than or equal to 1 mu m, 0.08% of organic fiber, 0.5% of sodium tripolyphosphate, 1% of boron carbide, 1.5% of boron carbide with the granularity of less than or equal to 0.045mm of 0.5% of aluminum powder.
Comparative example 4
The aluminophosphate-bonded blast furnace tap channel castable of the comparative example comprises the following components in percentage by mass:
The aluminum oxide powder comprises 8% of dense corundum particles with the granularity of less than or equal to 15mm and more than 8mm, 15% of dense corundum particles with the granularity of less than or equal to 8mm and more than 5mm, 8% of dense corundum particles with the granularity of less than or equal to 5mm and more than 3mm, 9% of dense corundum particles with the granularity of less than or equal to 3mm and more than 1mm, 10.92% of dense corundum fine powder with the granularity of less than or equal to 0.074mm, 10% of zirconium corundum particles with the granularity of less than or equal to 3mm and more than 1mm, 7% of zirconium corundum particles with the granularity of less than or equal to 1mm and more than 0.074mm, 8% of silicon carbide particles with the granularity of less than or equal to 1. 1mm and more than 0.074mm, 12% of silicon carbide fine powder with the granularity of less than or equal to 1 mu m, 5% of alpha alumina with the granularity of less than or equal to 1 mu m, 4% of rho alumina with the granularity of 1 mu m, 1% of coke powder, 0.08% of organic fiber, 0.5% of sodium tripolyphosphate, 1% of boron carbide with the granularity of less than or equal to 0.045 mm.
The components of the aluminum phosphate-bonded blast furnace runner castable of each of the examples and comparative examples, except the binder, were prepared and mixed in the above-mentioned proportions, stirred for 2 minutes, then, after adding an aluminum dihydrogen phosphate solution (the water content in the aluminum dihydrogen phosphate solution is 0.5 wt%), stirred for 3 minutes, vibration-cast into a 40mm×40mm×160mm sample, cured for 24 hours, baked at 110 ℃ ×24 hours, burned in a high-temperature furnace at 1450 ℃ ×3 hours, and subjected to 1400 ℃ ×0.5 hour hot flexural strength, and the test results are shown in table 1 below.
As can be seen from the data of table 1, the blast furnace runner castable of comparative example 1 does not contain coke powder, metal aluminum powder and metal vanadium powder, and has poor thermal shock stability and slag erosion resistance, which is reflected by poor high-temperature flexural strength; in comparative example 2, the coke powder is added, the metal aluminum powder and the metal vanadium powder are not added, the oxidation resistance of the castable is poor, and the high-temperature strength performance is poor; in the comparative example 3, the metal aluminum powder is added, and the coke powder and the metal vanadium powder are not added, so that the thermal shock stability and the slag erosion resistance are poor, and the high-temperature flexural strength is poor; in comparative example 4, the high-temperature strength performance is poor when the coke powder and the metal aluminum powder are added and the metal vanadium powder is not added.
In contrast, the high temperature performance of the blast furnace runner castable of each example of the present application is superior to each comparative example. Among them, examples 1 to 8 are preferred embodiments compared with examples 9 to 12, and in example 9, the content of the metal aluminum powder is too small, so that the oxidation resistance of the castable is poor, and in example 10, the content of the metal aluminum powder is too large, so that the high temperature strength is reduced.
In examples 2, 13 and 16, the mass ratio of the coke powder, the metal aluminum powder and the metal vanadium powder is different, the mass ratio of the coke powder, the metal aluminum powder and the metal vanadium powder in examples 2, 13 and 14 is in a preferred range, the comprehensive performance of the castable is better, and the mass ratio of the coke powder, the metal aluminum powder and the metal vanadium powder in examples 15 and 16 is not proper, and the comprehensive performance of the castable is poorer than that of examples 2, 13 and 14.
Examples 2 and 17-19 are different in that the ratio of aggregate to fines is different, the ratio of aggregate to fines in examples 2 and 17 can alleviate the volume expansion caused by the formation of V 2 AlC phase, thereby making the strength performance better, while the ratio of aggregate to fines in examples 18 and 19 cannot alleviate the volume expansion caused by the formation of V 2 AlC phase, which is inferior to examples 2 and 17.
TABLE 1
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (7)
1. The aluminum phosphate combined blast furnace tapping channel castable is characterized by comprising the following components in percentage by mass:
45% -53% of dense corundum, 15% -21% of zirconia corundum, 18% -22% of silicon carbide, 4% -6% of alpha alumina, 3% -6% of rho alumina, 0.5% -2% of coke powder, 0.01% -0.1% of explosion-proof fiber, 0.3% -0.6% of water reducer, 0.5% -1.5% of boron carbide, 0.5% -1% of metal aluminum powder, 0.5% -2% of metal vanadium powder and 4% -6% of aluminum phosphate bonding agent. The mass ratio of the coke powder to the metal aluminum powder to the metal vanadium powder is 1:0.3-1:0.5-2; the dense corundum comprises dense corundum particles with the granularity more than 0.074mm and dense corundum fine powder with the granularity less than or equal to 0.074 mm; the zirconia corundum comprises zirconia corundum particles with the granularity of more than 0.074 mm; the silicon carbide comprises silicon carbide particles with the granularity more than 0.074mm and silicon carbide fine powder with the granularity less than or equal to 0.074 mm; the total mass of the compact corundum particles, the zirconia corundum particles and the silicon carbide particles is 60% -65% of the blast furnace tapping channel castable.
2. The aluminophosphate-bonded blast furnace tap channel castable of claim 1, characterized by:
The mass ratio of the boron carbide to the metal aluminum powder is 1-3:1.
3. The aluminophosphate-bonded blast furnace tap channel castable of claim 1, characterized by:
The compact corundum comprises particles with the particle size less than or equal to 15mm and more than 8mm, particles with the particle size less than or equal to 8mm and more than 5mm, particles with the particle size less than or equal to 5mm and more than 3mm, particles with the particle size less than or equal to 3mm and more than 1mm and fine powder with the particle size less than or equal to 0.074 mm; the mass ratio of the particles with the particle size less than or equal to 15mm and more than 8mm, the particles with the particle size less than or equal to 8mm and more than 5mm, the particles with the particle size less than or equal to 5mm and more than 3mm, the particles with the particle size less than or equal to 3mm and more than 1mm and the fine powder with the particle size less than or equal to 0.074mm is 6-10:12-17:6-10:5-12:8-13;
The zirconia corundum comprises particles with the granularity of less than or equal to 3mm and more than 1mm and particles with the granularity of less than or equal to 1mm and more than 0.074 mm; and the mass ratio of the particles with the particle size of less than or equal to 3mm and more than 1mm to the particles with the particle size of less than or equal to 1mm and more than 0.074mm is 8-14:5-8;
The silicon carbide comprises particles with the particle size less than or equal to 1mm and more than 0.074mm and fine powder with the particle size less than or equal to 0.074 mm; and the mass ratio of the particles with the particle size less than or equal to 1mm and more than 0.074mm to the fine powder with the particle size less than or equal to 0.074mm is 8-10:10-12.
4. The aluminophosphate-bonded blast furnace tap channel castable of claim 1, characterized by:
in the zirconia corundum, al 2O3≥90wt%、Fe2O3 is less than or equal to 1.3wt percent, and the particle volume density of the zirconia corundum is more than or equal to 3.5g/cm 3.
5. The aluminophosphate-bonded blast furnace tap channel castable of claim 1, characterized by:
in the compact corundum, al 2O3≥70wt%、ZrO2 is less than or equal to 20wt%, and the particle volume density of the compact corundum is more than or equal to 4g/cm 3.
6. The aluminophosphate-bonded blast furnace tap channel castable of claim 1, characterized by:
the granularity of alpha alumina is less than or equal to 1 mu m;
the granularity of rho alumina is less than or equal to 1 mu m;
The granularity of the boron carbide is less than or equal to 0.045mm;
The granularity of the metal aluminum powder is less than or equal to 0.074mm;
The granularity of the metal vanadium powder is less than or equal to 0.045mm.
7. The aluminophosphate-bonded blast furnace tap channel castable of claim 1, characterized by:
the aluminophosphate binder is aluminum dihydrogen phosphate.
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