CN109851333B - Nano sol combined wear-resisting plate for blast furnace main iron runner and preparation method and application thereof - Google Patents
Nano sol combined wear-resisting plate for blast furnace main iron runner and preparation method and application thereof Download PDFInfo
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Abstract
The invention discloses a nano sol combined wear-resisting plate for a blast furnace main iron runner. The wear-resisting plate comprises the following raw materials in parts by weight: 30-45 parts of magnesium-containing aluminum spinel corundum, 20-30 parts of fused compact corundum, 20-30 parts of SiC, 6-16 parts of non-oxide composite powder, 2-6 parts of active alumina micropowder, 1-4 parts of metal silicon powder, 4-8 parts of nano alumina sol, 0.05-0.1 part of wetting agent and 0.1-0.5 part of explosion-proof fiber, wherein the non-oxide composite powder comprises the following components in parts by weight: 1-3 parts of carbon black, 2-4 parts of silicon nitride, 1-5 parts of titanium carbonitride and 2-4 parts of aluminum titanate. The invention also discloses a preparation method and application of the wear-resisting plate. The invention can improve the erosion resistance, the wear resistance and the erosion resistance of the lining material of the main iron runner, improve the working environment of workers, shorten the repairing construction time of the main iron runner and prolong the service life of the main iron runner.
Description
Technical Field
The invention relates to the technical field of refractory materials for blast furnace ironmaking, in particular to a long-life and environment-friendly nano sol combined wear-resisting plate for a blast furnace main iron runner and a preparation method and application thereof.
Background
With the development of blast furnaces towards large scale, high efficiency, automation and long service life, the blast furnaces at home and abroad gradually adopt new technologies such as fine material, high air temperature, ultrahigh pressure furnace top, oxygen-rich amount increase, hydrocarbon and pulverized coal fuel injection, electronic computer control and the like, so that the production capacity of the blast furnaces is greatly improved. However, the temperature of molten iron rises, the treatment capacity of slag iron is increased, the tapping speed is increased, the erosion rate of the refractory material of the main iron runner is increased, the degree of erosion damage is more and more serious, the lining and repairing cost is greatly increased, and the original common refractory material for the main iron runner can not meet the requirement of blast furnace production.
With the increasingly fierce market competition, each large steel mill puts higher requirements on the cost performance of the refractory material for the main iron runner to improve the benefit. Therefore, research and development of a comprehensive technology of the main iron runner with long service life and high iron flux are urgent, and the comprehensive technology has very important significance for saving energy, reducing consumption, prolonging the service life of the main iron runner, ensuring high-efficiency and smooth operation of blast furnace tapping, shortening the gap between the blast furnace tapping and the iron-making and steel-making level of developed countries and improving enterprise competitiveness.
The technical defects of the refractory material for the main iron runner in the prior art comprise the following aspects: (1) the lining material in the main iron runner drop point area has poor slag iron scouring resistance and wear resistance, thereby causing the service life of the whole main iron runner to be reduced. (2) In the prior art, the refractory material for the main iron runner is more aluminateCement as binder, Ca in cement2+The ions react with the slag to generate a low-melting-point substance, namely gehlenite, and the tissue structure of the material is gradually eroded and damaged. (3) In the prior art, high-temperature asphalt is mostly used as a carbon source to resist the infiltration of iron slag and improve the corrosion resistance of the iron slag, but the asphalt volatilizes toxic substances containing benzopyrene in the using process to cause environmental pollution. (4) When the main iron runner is repaired, the construction time is longer, generally more than 15 hours, the normal production of a blast furnace is influenced, and the requirement of iron-making technology development on refractory materials for the main iron runner cannot be met.
Disclosure of Invention
Based on the problems, the invention aims to provide a long-life and environment-friendly nano sol combined wear-resisting plate for a main iron runner of a blast furnace, so as to improve the erosion resistance, the corrosion resistance, the working environment of workers, shorten the repair construction time of the main iron runner and prolong the service life of the main iron runner.
The invention also aims to provide a preparation method of the nano sol combined wear-resisting plate for the blast furnace main iron runner.
The invention also aims to provide application of the wear-resisting plate prepared by the method.
In order to achieve the purpose, the invention adopts the following technical scheme:
according to one aspect of the invention, the long-life environment-friendly blast furnace main iron runner nano sol combined wear-resistant plate provided by the invention comprises the following raw materials in parts by weight:
the non-oxide composite powder comprises the following components in parts by weight: 1-3 parts of carbon black, 2-4 parts of silicon nitride, 1-5 parts of titanium carbonitride and 2-4 parts of aluminum titanate.
The nanosol of the present invention is more specifically described below in conjunction with each raw material in the wear plate.
In a preferred embodiment of the invention, wherein:
the magnesium-containing aluminate spinel corundum is an alumina-based magnesium complex-phase material and can be obtained by the following method: the magnesium aluminate spinel corundum is applied to refractory materials and has better strength, thermal shock resistance, spalling resistance and slag resistance and enhanced bonding property of aggregate and matrix compared with common sintered corundum. In the magnesium-containing aluminate spinel corundum of the present invention, Al is required2O3The content is more than or equal to 96wt%, the MgO content is less than or equal to 4wt%, and the gradation is as follows: 0-10 parts of 15 mm-8 mm, 10-15 parts of 8 mm-5 mm, 10-15 parts of 5 mm-3 mm and 10-15 parts of 3 mm-1 mm.
The fused dense corundum, its Al2O3The content is more than or equal to 98wt percent, and the volume density is more than or equal to 3.8g/cm310-15 parts of 1-0.2 mm gradation and 10-15 parts of grain size less than or equal to 0.074 mm.
The SiC content of the SiC is more than or equal to 98wt%, and the granularity is less than or equal to 0.045 mm.
The active alumina micro powder is CL370 type bimodal alumina, Al2O3The content is more than or equal to 99wt percent, and the D50 is less than or equal to 2.3 mu m.
The Si content of the metal silicon powder is more than or equal to 95wt%, and the granularity is less than or equal to 0.074 mm.
The solid content of the nano aluminum sol is more than or equal to 20 percent, and the particle size is less than or equal to 20 nm.
The wetting agent is GLYDOL N1003 type wetting agent.
The explosion-proof fiber is water-soluble explosion-proof fiber, the fiber length is 3-5 mm, and the melting point is less than or equal to 100 ℃.
In the non-oxide composite powder, the carbon black is produced by a thermal cracking method, and the carbon content is more than or equal to 99 wt%.
The total nitrogen TN content of the silicon nitride is more than or equal to 37 percent, and the granularity is less than or equal to 0.045 mm.
The titanium carbonitride has the total nitrogen TN content of 10.8-13.5%, free carbon F.C content of less than or equal to 0.3% and granularity of less than or equal to 0.045 mm.
The aluminum titanate phase content is more than or equal to 95%, the volume density is more than or equal to 3.1g/cm3, and the granularity is less than or equal to 0.074 mm.
In the invention, the preparation method of the non-oxide composite powder comprises the following steps: weighing the components of the composite powder according to the parts by weight, pouring the components into an inclined stirrer for mixing, controlling the rotating speed of a rotor to be 150-180 r/min, controlling the mixing time to be 3-5 minutes, and filling the components into a waterproof packaging bag for sealing and storing after mixing.
According to another aspect of the present invention, there is provided a method of manufacturing a wear plate, comprising: weighing the raw materials in parts by weight; stirring the weighed components in a stirrer for 5 minutes, wherein the adding amount of the alumina sol is adjusted to ensure that the vibration fluidity of the alumina sol reaches 130-140 mm; and then pouring the mixture into a corresponding wear-resistant plate die, tamping the mixture by using a vibrating rod to discharge air holes, curing the mixture in air for 24 hours, then demoulding the mixture, and baking the mixture at 110 ℃ for 24 hours to obtain the wear-resistant plate.
Preferably: the wear-resisting plate, its length, width, high size do respectively: 2000-4000 mm, 200-300 mm, 700-1000 mm.
According to a further aspect of the present invention there is provided a use of a wear plate as described above, comprising: the wear-resisting plate obtained in the above way is applied to the iron falling point of the main iron runner.
Preferably, the two wear-resisting plates are fixed on the main channel die and are arranged at a position 2000-4000 mm away from the main iron channel tapping hole, more preferably 3000mm, and then a main iron channel casting material is poured, so that the wear-resisting plates are embedded (poured) in the main iron channel casting material to form a lining structure together with the main iron channel casting material, and the outer surface of the wear-resisting plates and the surface of the main iron channel casting material jointly form the inner wall of the main channel. The specific structure and shape of the wear plate can be designed according to needs, and can be, for example: the longitudinal section along the width direction is a parallelogram, and the inclination angle of the bevel edge is consistent with that of the main iron runner. In order to be conveniently fixed with the main channel die, a lifting lug can be arranged at the top of the wear-resisting plate; a fixing plate is arranged below one side of the wear-resisting plate. In order to be more attached to the main iron runner casting material, a fixing pin can be arranged at the bottom.
Compared with the prior art, the invention has the following innovations and beneficial effects:
(1) the raw material of the nano sol combined wear-resisting plate adopts magnesium-containing aluminum spinel corundum as the aggregate, so that the nano sol combined wear-resisting plate has good strength, thermal shock resistance, stripping resistance and slag resistance, the scouring resistance and wear resistance of the wear-resisting plate are improved, and meanwhile, the nano sol combined wear-resisting plate has good high-temperature structural toughness; when this raw materials made antifriction plate and castable constitute main ditch inner liner structure jointly, can strengthen the associativity of antifriction plate and base member castable, solved and combine not good problem between antifriction plate prefab and the castable. The high-volume-density electric melting dense corundum is adopted in the part of the components with the small particle size of 1-0.045mm, so that the material can form a closest packing model, the volume density of the material is increased, and the scouring resistance and the wear resistance of the whole material are improved. The aggregate adopts the combination of magnesium-containing aluminum spinel corundum and electric melting compact corundum, and the material has the best wear resistance, slag iron scouring resistance and erosion resistance on a macroscopic scale. The matrix part takes SiC with high Mohs hardness as a main component, so that the scouring resistance and the thermal shock resistance of the material can be improved, and meanwhile, the CL370 type bimodal alumina micro powder is matched, so that compared with the common alumina micro powder, the powder is easy to disperse and does not agglomerate, the gaps among particles can be effectively filled, the consumption of a binding agent is reduced, and the compactness of the material is improved.
(2) The non-oxide composite powder introduces titanium carbonitride, has the advantages of both titanium carbide and titanium nitride, has the advantages of high melting point, high hardness, good oxidation resistance and the like, resists the infiltration of slag iron, can effectively reduce the erosion of the slag iron to materials, can enhance the fracture toughness of the materials, and releases the impact stress of the slag iron born by the wear-resisting plate to a certain extent. The carbon black, the aluminum titanate and the silicon nitride in the composite powder are mixed at a high speed in an inclined stirrer, are fully and uniformly dispersed, and can react in situ at a high temperature to generate the titanium carbonitride, the in-situ generated titanium carbonitride enhances the associativity of the matrix, and new titanium carbonitride is continuously generated along with the abrasion consumption of the wear-resisting plate to continuously protect the material matrix. The carbon black introduced by the invention is used as a carbon source for replacing the asphalt in the prior art, the carbon black is high in carbon residue, good in slag iron wettability and free of pollution, meanwhile, part of the carbon black reacts with the added metal silicon to generate SiC, and the SiC formed in situ has high bonding strength and is more favorable for resisting the scouring of slag iron. The introduced aluminum titanate has high melting point, low linear expansion coefficient and good slag iron corrosion resistance and thermal shock resistance, and simultaneously utilizes the anisotropy of the linear expansion coefficient of the crystal to generate microcracks in the material so as to be beneficial to transferring the stress concentration of main crack expansion in the material, dissipate partial strain energy at the tip of the main crack, increase the total surface energy generated by increasing the crack expansion area, further increase the energy required by further expanding the main crack, effectively inhibit the crack expansion, improve the fracture toughness and slow down the impact stress of the wear-resisting plate bearing slag iron erosion.
(3) The long-life environment-friendly nano sol combined wear-resistant plate adopts water-soluble explosion-proof fibers, and the water-soluble explosion-proof fibers can be melted when a casting body is baked to form micro pores, so that the water in the casting body can be discharged conveniently, and the explosion resistance of the wear-resistant plate is improved.
(4) The long-life environment-friendly nano sol combined wear-resisting plate takes the nano alumina sol as the bonding agent to replace a cement bonding agent in the iron runner castable in the prior art, thereby reducing Ca2+The introduction reduces the generation of the gehlenite which is a low-melting-point substance at high temperature; compared with a silica sol binder, the SiO content is reduced2The introduction of the corundum phase increases the content of the corundum phase of the matrix, and improves the erosion resistance and the wear resistance of the material. Meanwhile, the nano alumina sol is used as a bonding agent, and the wear-resisting plate can be quickly baked, so that the construction time is reduced, and the requirement for quickly repairing the main iron runner is met.
(5) The raw material of the long-life environment-friendly nano sol combined wear-resisting plate adopts a GLYDOL N1003 type wetting agent, which is beneficial to the dispersion and wetting of powder materials, particularly carbon sources which are difficult to wet and disperse such as carbon black, graphite and the like, so that the addition amount of a bonding agent is reduced, the fluidity of the materials is improved, and the binding property of carbon elements in the materials is improved.
(6) The main iron runner iron falling point is the most serious part of the slag iron erosion corrosion, and the wear-resistant plate is used as the lining of the main iron runner iron falling point area, so that the slag iron erosion resistance and the corrosion resistance of the area are greatly improved, the integral service life of the main iron runner is prolonged, and the periodic iron flux of the main iron runner is improved by 30-50% compared with the prior art.
(7) When traditional main iron runner was mended in use period, construction was generally used more than 15 hours, to single taphole blast furnace, will go on the shut down of blowing down, influenced steel mill economic benefits, to two taphole blast furnaces, need to the continuous tapping of field taphole, can arouse the regional furnace hearth temperature rise of taphole, brought the potential safety hazard. When the wear-resistant plate is applied to the main iron runner, when the main iron runner iron falling point area is repaired, only the wear-resistant plate needs to be partially removed and then replaced by a new wear-resistant plate, the gap is filled with the castable, the baking is carried out for 2-4 hours, the whole repairing time is 5-8 hours, the repairing time is shortened by more than 50% compared with the prior art, and the steel plant can recover production quickly.
In the blast furnace ironmaking production process, the nano sol combined wear-resisting plate is adopted as a lining material of a main iron runner dropping point area, is free of cement, silica fume, asphalt and alkali metal sodium salt, has good structural toughness, thermal shock resistance, slag iron infiltration resistance, scouring resistance, wear resistance, oxidation resistance, micro-expansibility and environmental friendliness, is a new-generation lining material of the main iron runner, and prolongs the service life of the main iron runner. The use of a conventional refractory for a main iron runner, which comprises the following main components: brown corundum; silicon carbide; alumina; clay powder; asphalt powder; aluminate cement; silicon micropowder; metal aluminum powder; sodium tripolyphosphate, and the like.
TABLE 1 comparison of the Performance of the conventional refractory for main iron runners and the wear plate for main iron runners according to the present invention
As can be seen from the table 1, compared with the traditional refractory material for the main iron runner, the long-life environment-friendly nano sol combined wear-resistant plate has higher volume density and bonding strength and good erosion resistance and wear resistance; the volume stability is good, and the anti-stripping and anti-cracking performance is good; environment-friendly and greatly prolonged service life.
Detailed Description
The present invention will be further described with reference to specific examples, which are provided for illustrative purposes only and are not intended to limit the scope of the present invention.
Firstly, the preparation of magnesium-containing aluminate spinel corundum in the material of the nano sol combined wear-resistant plate
The method comprises the steps of taking industrial alumina powder as a main material and magnesia powder as an additive, carrying out fine grinding, forming and drying, and sintering at 1750-1950 ℃, embedding a magnesium aluminate spinel phase generated in the reaction process into a corundum phase, cooling and crushing to obtain magnesium aluminate-containing spinel corundum with various particle sizes, wherein Al in the magnesium aluminate-containing spinel corundum is contained2O3The content is about 97.5 wt%, and the MgO content is about 2.5 wt%.
Preparation of non-oxidized composite powder in nano sol combined wear-resisting plate
Examples 1 to 5
In examples 1 to 5, the components of the non-oxidized composite powder were weighed in the parts by weight shown in table 2, poured into an inclined stirrer and mixed, the rotation speed of the rotor was controlled to 150 to 180r/min, the mixing time was controlled to 3 to 5 minutes, and the mixture was packed in a waterproof packaging bag and sealed for storage.
Table 2 compositions of non-oxide composite powders of examples 1 to 5
| Name (R) | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 |
| Carbon black | 1 | 2 | 3 | 3 | 1 |
| Silicon nitride | 2 | 3 | 4 | 4 | 2 |
| Titanium carbonitride | 3 | 3 | 3 | 5 | 1 |
| Aluminum titanate | 2 | 3 | 4 | 4 | 2 |
Thirdly, nanometer sol prepared by adopting non-oxidized composite powder is combined with long-life environment-friendly wear-resisting plate
Production example of wear-resistant plate 1
The components and parts by weight are as follows: 35 parts of magnesium-containing aluminum spinel corundum; 25 parts of fused compact corundum; 25 parts of SiC; 8 parts of the non-oxide composite powder prepared in the above example 1; 5 parts of active alumina micro powder, 2 parts of metal silicon powder, 6 parts of nano alumina sol, 0.05 part of wetting agent and 0.2 part of explosion-proof fiber,
wherein the magnesium-containing aluminate spinel corundum is 10 parts of 8 mm-5 mm in gradation; 15 parts of 5 mm-3 mm and 10 parts of 3 mm-1 mm.
Wherein the fused dense corundum is 15 parts with the gradation of 1 mm-0.2 mm; 10 portions with the granularity less than or equal to 0.074 mm.
Weighing the components of the wear-resistant plate raw material according to the parts by weight, pouring the components into a stirrer to be stirred for 5 minutes, adjusting the addition of the nano alumina sol to enable the vibration fluidity of the nano alumina sol to reach 130-140 mm, then pouring the nano alumina sol into a corresponding wear-resistant plate die, tamping the nano alumina sol to discharge air holes by using a vibrating rod, curing the nano alumina sol in air for 24 hours, then demolding, and baking the nano alumina sol for 24 hours at 110 ℃.
Production example 2 of abrasion-resistant plate
The components and parts by weight are as follows: 35 parts of magnesium-containing aluminum spinel corundum; 24 parts of fused compact corundum; 25 parts of SiC; 11 parts of the non-oxide composite powder prepared in the above example 2; 3 parts of active alumina micro powder, 2 parts of metal silicon powder, 7 parts of nano alumina sol, 0.06 part of wetting agent, 0.2 part of explosion-proof fiber,
wherein the magnesium-containing aluminate spinel corundum is 10 parts of 8 mm-5 mm in gradation; 15 parts of 5 mm-3 mm and 10 parts of 3 mm-1 mm.
Wherein the fused dense corundum is 10 parts with the gradation of 1 mm-0.2 mm; 14 portions with the granularity less than or equal to 0.074 mm.
Weighing the components of the wear-resistant plate raw material according to the parts by weight, pouring the components into a stirrer to be stirred for 5 minutes, adjusting the addition of the nano alumina sol to enable the vibration fluidity of the nano alumina sol to reach 130-140 mm, then pouring the nano alumina sol into a corresponding wear-resistant plate die, tamping the nano alumina sol to discharge air holes by using a vibrating rod, curing the nano alumina sol in air for 24 hours, then demolding, and baking the nano alumina sol for 24 hours at 110 ℃.
Production example 3 of wear-resistant plate
The components and parts by weight are as follows: 35 parts of magnesium-containing aluminum spinel corundum; 24 parts of fused compact corundum; 22 parts of SiC; 14 parts of the non-oxide composite powder prepared in the above example 3; 3 parts of active alumina micro powder, 2 parts of metal silicon powder, 8 parts of nano alumina sol, 0.07 part of wetting agent and 0.2 part of explosion-proof fiber,
wherein the magnesium-containing aluminate spinel corundum is 10 parts of 8 mm-5 mm in gradation; 15 parts of 5 mm-3 mm and 10 parts of 3 mm-1 mm.
Wherein the fused dense corundum is 10 parts with the gradation of 1 mm-0.2 mm; 14 portions with the granularity less than or equal to 0.074 mm.
Weighing the components of the wear-resistant plate raw material according to the parts by weight, pouring the components into a stirrer to stir for 5 minutes, adjusting the addition of the nano alumina sol to enable the vibration fluidity of the nano alumina sol to reach 130-140 mm, then pouring the nano alumina sol into a corresponding wear-resistant plate die, tamping the nano alumina sol to discharge air holes by using a vibrating rod, curing the nano alumina sol in air for 24 hours, then demolding, and baking the nano alumina sol for 24 hours at 110 ℃ to obtain the wear-resistant plate.
Production example of wear-resistant plate 4
The components and parts by weight are as follows: 35 parts of magnesium-containing aluminum spinel corundum; 24 parts of fused compact corundum; 20 parts of SiC; 16 parts of the non-oxide composite powder prepared in the above example 4; 3 parts of active alumina micro powder, 2 parts of metal silicon powder, 8 parts of nano alumina sol, 0.08 part of wetting agent and 0.2 part of explosion-proof fiber,
wherein the magnesium-containing aluminate spinel corundum is 10 parts of 8 mm-5 mm in gradation; 15 parts of 5 mm-3 mm and 10 parts of 3 mm-1 mm.
Wherein the fused dense corundum is 10 parts with the gradation of 1 mm-0.2 mm; 14 portions with the granularity less than or equal to 0.074 mm.
Weighing the components of the wear-resistant plate raw material according to the parts by weight, pouring the components into a stirrer to stir for 5 minutes, adjusting the addition of the nano alumina sol to enable the vibration fluidity of the nano alumina sol to reach 130-140 mm, then pouring the nano alumina sol into a corresponding wear-resistant plate die, tamping the nano alumina sol to discharge air holes by using a vibrating rod, curing the nano alumina sol in air for 24 hours, then demolding, and baking the nano alumina sol for 24 hours at 110 ℃ to obtain the wear-resistant plate.
Production example 5 of wear-resistant plate
The components and parts by weight are as follows: 35 parts of magnesium-containing aluminum spinel corundum; 25 parts of fused compact corundum; 26 parts of SiC; 6 parts of the non-oxide composite powder prepared in the above example 5; 6 parts of active alumina micro powder, 2 parts of metal silicon powder, 6 parts of nano alumina sol, 0.05 part of wetting agent and 0.2 part of explosion-proof fiber,
wherein the magnesium-containing aluminate spinel corundum is 10 parts of 8 mm-5 mm in gradation; 15 parts of 5 mm-3 mm and 10 parts of 3 mm-1 mm.
Wherein the fused dense corundum is 15 parts with the gradation of 1 mm-0.2 mm; 10 portions with the granularity less than or equal to 0.074 mm.
Weighing the components of the wear-resistant plate raw material according to the parts by weight, pouring the components into a stirrer to be stirred for 5 minutes, adjusting the addition of the nano alumina sol to enable the vibration fluidity of the nano alumina sol to reach 130-140 mm, then pouring the nano alumina sol into a corresponding wear-resistant plate die, tamping the nano alumina sol to discharge air holes by using a vibrating rod, curing the nano alumina sol in air for 24 hours, then demolding, and baking the nano alumina sol for 24 hours at 110 ℃.
Preparing a casting material according to the component proportion in preparation 1-preparation example 5, pouring the casting material into a triple die with the size of 40 multiplied by 160mm, baking the casting material for 24 hours at the temperature of 110 ℃ after demoulding, and embedding carbon and preserving heat for 3 hours at the temperature of 1450 ℃ to obtain the wear-resisting plate sample. The volume density, compressive strength, linear change rate and abrasion loss of the test sample are detected according to national standards YB/T5200, GB/T3001, GB/T5072, GB/T5988 and GB/T18301-2012 respectively, and the detection results are shown in Table 3:
table 3 performance test results of nanosol bonded abrasion-resistant plate samples prepared by the present invention
As can be seen from Table 3, the long-life environment-friendly nano sol combined wear-resistant plate has the advantages of high volume density, high bonding strength, low abrasion loss, high volume stability, high sintering property, high structural toughness and high slag and iron erosion resistance, the iron passing amount reaches 18-25 ten thousand tons in the actual application process, and the service life of the nano sol combined wear-resistant plate is prolonged by about 40 percent compared with that of the conventional refractory material for the main iron runner.
Claims (7)
1. The utility model provides a blast furnace owner is nanometer sol combination antifriction plate for iron runner, its characterized in that, the antifriction plate inlays in main iron runner castables and is located main iron runner iron falling point department, the antifriction plate forms the inner lining structure with main iron runner castables jointly, the raw materials of antifriction plate contains according to part by weight:
30-45 parts of magnesium-containing aluminum spinel corundum,
20-30 parts of electric melting compact corundum,
20-30 parts of SiC,
6-16 parts of non-oxide composite powder,
2-6 parts of active alumina micro powder,
1-4 parts of metal silicon powder,
4-8 parts of nano aluminum sol,
0.05 to 0.1 portion of wetting agent,
0.1 to 0.5 part of water-soluble explosion-proof fiber,
wherein the non-oxide composite powder comprises the following components in parts by weight: 1-3 parts of carbon black, 2-4 parts of silicon nitride, 1-5 parts of titanium carbonitride and 2-4 parts of aluminum titanate; the non-oxide composite powder is obtained by weighing the components according to the parts by weight, pouring the weighed components into an inclined stirrer, controlling the rotating speed of a rotor at 150-180 r/min, and mixing for 3-5 minutes; the carbon black is produced by a thermal cracking method, and the carbon content is more than or equal to 99 wt%; the total nitrogen TN content of the silicon nitride is more than or equal to 37 percent, and the granularity is less than or equal to 0.045 mm; the titanium carbonitride has the total nitrogen TN content of 10.8-13.5%, free carbon F.C content of less than or equal to 0.3% and particle size of less than or equal to 0.045 mm; the aluminum titanate phase content is more than or equal to 95 percent, and the volume density is more than or equal to 3.1g/cm3The granularity is less than or equal to 0.074 mm;
the magnesium-containing aluminum spinel corundum, Al2O3The content is more than or equal to 96wt%, the MgO content is less than or equal to 4wt%, and the gradation is as follows: 0-10 parts of 15 mm-8 mm, 10-15 parts of 8 mm-5 mm, 10-15 parts of 5 mm-3 mm and 10-15 parts of 3 mm-1 mm; the fused dense corundum, its Al2O3The content is more than or equal to 98wt percent, and the volume density is more than or equal to 3.8g/cm310-15 parts of 1-0.2 mm gradation and 10-15 parts of grain size less than or equal to 0.074 mm;
the solid content of the nano aluminum sol is more than or equal to 20 percent, and the particle size is less than or equal to 20 nm.
2. The nanosol bonded wear plate for a blast furnace main iron runner of claim 1, wherein: the active alumina micro powder is CL370 type bimodal alumina and Al thereof2O3The content is more than or equal to 99wt percent, and the D50 is less than or equal to 2.3 mm.
3. The nanosol bonded wear plate for a blast furnace main iron runner of claim 1, wherein: the Si content of the metal silicon powder is more than or equal to 95wt%, and the granularity is less than or equal to 0.074 mm; the wetting agent is GLYDOL N1003 type wetting agent; the water-soluble explosion-proof fiber has a fiber length of 3-5 mm and a melting point of less than or equal to 100 ℃.
4. A method for manufacturing a wear plate is characterized by comprising the following steps:
the raw materials and the parts by weight thereof according to claim 1,
stirring the weighed components in a stirrer for 5 minutes, adjusting the addition of the nano-alumina sol to ensure that the vibration fluidity of the nano-alumina sol reaches 130-140 mm,
and pouring the mixture into a wear-resistant plate die, tamping the mixture to discharge air holes by using a vibrating rod, curing the mixture in air for 24 hours, then demoulding the mixture, and baking the mixture at 110 ℃ for 24 hours to obtain the wear-resistant plate.
5. A method of manufacturing a wear plate in accordance with claim 4, wherein the wear plate has length, width and height dimensions: 2000-4000 mm, 200-300 mm, 700-1000 mm.
6. Use of a wear plate according to claim 4 in the application of a wear plate to the drop point of a main iron runner.
7. Use of a wear plate in accordance with claim 6, wherein the wear plate is cast in a main runner casting material at a drop point, the wear plate having a centre point which is 2000 to 4000mm from a tap hole location.
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| CN110498688A (en) * | 2019-09-16 | 2019-11-26 | 江苏瑞复达新材料有限公司 | A kind of structural ceramics enhancing high silicon oxygen Aluminum sol powder and preparation method thereof |
| CN111548129A (en) * | 2020-05-12 | 2020-08-18 | 唐山市国亮特殊耐火材料有限公司 | Anti-corrosion aluminum magnesium castable |
| CN115466105B (en) * | 2022-11-14 | 2023-04-04 | 北京利尔高温材料股份有限公司 | Blast furnace iron tapping channel main channel castable and preparation method thereof |
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