CN117865658A - Aluminum phosphate combined casting material for blast furnace tapping channel - Google Patents

Aluminum phosphate combined casting material for blast furnace tapping channel Download PDF

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CN117865658A
CN117865658A CN202410240368.9A CN202410240368A CN117865658A CN 117865658 A CN117865658 A CN 117865658A CN 202410240368 A CN202410240368 A CN 202410240368A CN 117865658 A CN117865658 A CN 117865658A
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powder
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CN117865658B (en
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徐浩然
赵辉
王佳宁
赵现华
崔志强
赵现堂
丁海瑞
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Haicheng Lier Maige Xita Material Co ltd
Beijing Lier High Temperature Materials Co Ltd
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Haicheng Lier Maige Xita Material Co ltd
Beijing Lier High Temperature Materials Co Ltd
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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. The aluminum phosphate combined blast furnace tapping channel castable is added with metal vanadium powder, and the metal vanadium powder, the metal aluminum powder and the coke powder can react to generate new phase ceramic V 2 AlC and new phases can generate a net structure, and aggregate and fine powder are better interweaved and combined together, so that the strength performance and the thermal shock resistance of the whole castable are improved.

Description

Aluminum phosphate combined casting material for blast furnace tapping channel
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 all adopt Al 2 O 3 The Chinese patent document with the publication number of CN111675545A discloses a casting material for a blast furnace tapping channel, 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 invention solves the technical problem of providing an aluminophosphate combined blast furnace tapping channel castable, which can be added with metal vanadium powder, metal aluminum powder and coke powderReacting to obtain new phase ceramic V 2 AlC and new phases can generate a net structure, and aggregate and fine powder are better interweaved and combined together, so that the strength performance and the thermal shock resistance of the whole 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 0.074mm; the zirconia corundum comprises zirconia corundum particles with the granularity of more than 0.074mm; 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 0.074mm; 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 0.074mm; 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 0.074mm; 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 0.074mm; 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 2 O 3 ≥90wt%、Fe 2 O 3 Less than or equal to 1.3 weight percent, and the volume density of the particles of the chrome corundum is more than or equal to 3.5g/cm 3 。
Preferably, in the dense corundum, al 2 O 3 ≥70wt%、ZrO 2 Less than or equal to 20wt%, and the volume density of the particles of the compact 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 aluminum phosphate combined blast furnace tapping channel castable is added with the coke powder, but the addition of the coke powder can reduce the strength performance and the wear resistance of the castable, therefore, the aluminum phosphate combined blast furnace tapping channel castable is further added with the metal vanadium powder, and the metal vanadium powder, the metal aluminum powder and the coke powder can react to generate new phase ceramic V at high temperature 2 The AlC 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 strength performance and the thermal shock resistance of the whole castable are improved.
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 aluminum phosphate combined blast furnace tapping channel castable of the embodiment of the invention is added with the coke powder, but the addition of the coke powder can reduce the strength performance and the wear resistance of the castable, therefore, the invention further adds the metal vanadium powder, and the metal vanadium powder, the metal aluminum powder and the coke powder can react to generate new phase ceramic V at high temperature 2 The AlC 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 strength performance and the thermal shock resistance of the whole 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.
Proper amount of new phase ceramic V 2 The formation of AlC can improve the comprehensive performance of the castable, while excessive V 2 The formation of AlC causes cracking of the material due to excessive expansion of the new phase, and the strength of the castable is rather lowered. 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. Thus, the coke powder, the metal aluminum powder and the metal vanadium powder react to generate V 2 AlC is not as good as possible, but certain unreacted coke powder and metal aluminum powder are reserved in 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.
Due to new phase ceramic V 2 The formation of AlC produces a certain volume expansion, while a proper amount of V 2 AlC can improve the performance of the castable, in order to prevent the castable from generating cracks due to excessive volume expansion, the invention further regulates the proportion between aggregate and fine powder, so that the castable generates a small amount of shrinkage and is matched with V 2 The volume expansion generated by AlC is matched, so that the volume expansion of the castable is proper, and the performance of the castable is improved. 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 0.074mm; the zirconia corundum comprises zirconia corundum particles with the granularity of more than 0.074mm; 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 0.074mm; 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 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 > 0.074mm; 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, in the zirconia corundum, al 2 O 3 ≥90wt%、Fe 2 O 3 Less than or equal to 1.3 weight percent, and the volume density of the particles of the chrome corundum is more than or equal to 3.5g/cm 3 。
In some embodiments, in the dense corundum, al 2 O 3 ≥70wt%、ZrO 2 Less than or equal to 20wt%, and the volume density of the particles of the compact 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 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% 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 powder with the granularity of less than or equal to 0.074mm of metal aluminum powder with the granularity of less than 5%, less than 5% of granularity of 0.5% of granularity of the granularity of 0.5 mm, and 5% of aluminum oxide powder with the granularity of 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 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, rho alumina 4% with the granularity of less than or equal to 1 mu m, coke powder 1%, organic fiber 0.08%, sodium tripolyphosphate, boron 1% with the content of boron carbide with the granularity of less than or equal to 0.045mm, boron carbide 1% with the granularity of less than or equal to 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 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 5 with the granularity of less than or equal to 1 mu m, rho alumina 4 with the granularity of less than or equal to 1 mu m, coke powder 1%, organic fiber 0.08%, sodium tripolyphosphate 0.5%, boron carbide 1 with the granularity of less than or equal to 0.045mm, aluminum metal aluminum powder 0.5 with the granularity of less than or equal to 1.045 mm, vanadium powder with the granularity of less than or equal to 1.5% and added.
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 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% of coke powder, 0.08% of organic fiber, 0.5% of sodium tripolyphosphate, 1% of boron carbide with the content, boron carbide with the granularity of less than or equal to 0.045mm of granularity of 0.5 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 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, rho alumina 4% 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, 1.5% of boron carbide with the granularity of less than or equal to 0.045mm of granularity of 0.5 mm.
Example 6
The aluminum phosphate combined blast furnace tapping channel castable comprises the following components in percentage by mass:
the aluminum oxide binder comprises 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 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 1.5%, 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 0.074mm, metallic aluminum powder with the granularity of less than or equal to 1%, metallic aluminum powder with the granularity of less than or equal to 1mm, and added with aluminum dihydrogen phosphate binder.
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 1mm 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 of boron carbide, 0.8% of the granularity of less than 8mm of metal aluminum powder, and 5% of less than 8% of granularity of less than or equal to 0.045mm.
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 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 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% of coke powder, 0.08% of organic fiber, 0.5% of sodium tripolyphosphate, 1% of boron carbide with the content, 1% of boron carbide with the granularity of less than or equal to or less than or equal to 0.045mm of 0.2 mm of metal aluminum powder with the granularity.
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 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, rho alumina 4% with the granularity of less than or equal to 1 mu m, 1% of coke powder, 0.08% of organic fiber, sodium tripolyphosphate, 1.5% of boron carbide, boron carbide with the granularity of less than or equal to 0.045% of the granularity of less than or equal to 0.0.045 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 3mm and more than 1mm, 10% of zirconia corundum particles with the granularity of less than or equal to 1mm and more than 0.074mm, 9% of silicon carbide particles with the granularity of less than or equal to 1. 1mm and more than 0.074mm, 13% of silicon carbide fine powder with the granularity of less than or equal to 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 metallic aluminum powder with the granularity of less than or equal to 0.074mm, 0.2% of 5% of metallic aluminum powder with the granularity, 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 aluminum dihydrogen phosphate.
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:
7% 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, 7% 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, 12.92% 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 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 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% 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 (by weight) compact corundum particles with a particle size of 15mm or less and > 8mm, compact corundum particles with a particle size of 8mm or less and > 5mm, compact corundum particles with a particle size of 5mm or less and > 3mm, compact corundum particles with a particle size of 3mm and > 1mm, compact corundum fine powder with a particle size of 0.074mm or less 11.42%, zirconium corundum particles with a particle size of 3mm and > 1mm 10%, silicon carbide particles with a particle size of 1. 1mm and > 0.074mm 8%, silicon carbide particles with a particle size of 1mm and > 0.074mm 8%, silicon carbide fine powder with a particle size of 0.074mm 12%, alpha alumina with a particle size of 1 μm or less 5%, ρalumina with a particle size of 1 μm or less 4%, coke powder 1%, organic fibers 0.08%, sodium tripolyphosphate 0.5%, boron carbide with a particle size of 0.045mm or less 1%, and 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, 1.0.34% of boron carbide with the granularity of less than or equal to less than or equal to 0% of 0.34 mm.
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 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, boron carbide with the granularity of less than or equal to 0.045% of the granularity of the silicon carbide powder with the granularity of less than 0.5%.
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 differ in the ratio of aggregate to fines, and examples 2 and 17 provide a reduction in the ratio of aggregate to fines due to V 2 The volume expansion due to AlC phase formation gives better strength properties, whereas the ratio of aggregate to fines in examples 18, 19 does not alleviate V 2 The volume expansion caused by the formation of AlC phase is inferior in strength properties to those of examples 2 and 17.
TABLE 1
110℃×24h The volume is dense after baking Degree/g/cm 3 110℃×24h Cold state resistance after baking Flexural Strength/MPa 110℃×24h Cold state resistance after baking Compressive strength/MPa 1450℃×3h Cold state resistance after burning Flexural Strength/MPa 1450℃×3h Cold state resistance after firing Compressive strength/MPa 1450℃×3h Permanent wire after burning Rate of change 1400℃× 0.5h thermal state resistance Flexural Strength/MPa
Example 1 3 5.3 48.6 10.3 89.3 0.2% 4.5
Example 2 3.01 5.8 49.6 12.2 96.4 0.2% 4.9
Example 3 3.01 5.5 48.5 11.6 90.1 0.3% 4.7
Example 4 3.02 5.2 47.8 9.4 80.7 0.3% 4
Example 5 3 5.1 41.9 10.2 87.5 0.3% 4
Example 6 3 4.9 43.6 9.9 84.9 0.3% 3.9
Example 7 3 5.0 44.2 9.8 85.2 0.3% 4.1
Example 8 3 5.1 42.5 10.2 81.3 0.2% 4.2
Example 9 3 5.0 43.2 8.2 76.2 0.3% 3.7
Example 10 3.01 4.9 42.7 8.5 78.3 0.3% 3.5
Example 11 3 4.5 40.5 7.6 72.3 0.3% 3.3
Example 12 3 4.8 41.2 7.9 73.1 0.3% 3.5
Example 13 3.01 5.5 48.2 11.9 95.3 0.2% 4.6
Example 14 3.01 5.7 48.9 11.5 95.7 0.2% 4.8
Example 15 3.01 5.3 48.4 10.2 82.5 0.3% 4.0
Example 16 3.01 5.5 48.6 9.8 83.4 0.3% 3.8
Example 17 3 5.7 48.7 11.5 93.4 0.2% 4.5
Example 18 3.02 5.8 47.9 10.2 86.3 0.3% 4.2
Example 19 3.01 5.6 48.2 9.5 83.2 0.3% 4.0
Comparative example 1 3.03 4.9 48.5 7.2 60.6 0.3% 3.1
Comparative example 2 2.99 4.5 45.1 7.3 55.7 0.3% 3.1
Comparative example 3 3.01 4.7 43.7 7.1 70.3 0.3% 3.3
Comparative example 4 2.98 3.5 42.1 7.1 49.1 0.3% 3.1
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 (10)

1. The aluminum phosphate combined blast furnace tapping channel castable is characterized by comprising 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.
2. The aluminophosphate-bonded blast furnace tap channel castable of claim 1, comprising 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 aluminum phosphate bonding agent.
3. The aluminophosphate-bonded blast furnace tap channel castable of claim 1, characterized by:
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.
4. The aluminophosphate bonded blast furnace tap runner castable of claim 3, wherein:
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 0.074mm; the zirconia corundum comprises zirconia corundum particles with the granularity of more than 0.074mm; 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 0.074mm; 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.
5. 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.
6. The aluminophosphate bonded blast furnace tap channel castable of claim 4, 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 0.074mm; 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 0.074mm; 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 0.074mm; 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.
7. The aluminophosphate-bonded blast furnace tap channel castable of claim 1, characterized by:
the zirconia corundumWherein Al is 2 O 3 ≥90wt%、Fe 2 O 3 Less than or equal to 1.3 weight percent, and the volume density of the particles of the chrome corundum is more than or equal to 3.5g/cm 3 。
8. The aluminophosphate-bonded blast furnace tap channel castable of claim 1, characterized by:
in the dense corundum, al 2 O 3 ≥70wt%、ZrO 2 Less than or equal to 20wt%, and the volume density of the particles of the compact corundum is more than or equal to 4g/cm 3 。
9. 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.
10. The aluminophosphate-bonded blast furnace tap channel castable of claim 1, characterized by:
the aluminophosphate binder is aluminum dihydrogen phosphate.
CN202410240368.9A 2024-03-04 2024-03-04 Aluminum phosphate combined casting material for blast furnace tapping channel Active CN117865658B (en)

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