CN114538902A - Anhydrous stemming and preparation method thereof - Google Patents
Anhydrous stemming and preparation method thereof Download PDFInfo
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- CN114538902A CN114538902A CN202111674642.6A CN202111674642A CN114538902A CN 114538902 A CN114538902 A CN 114538902A CN 202111674642 A CN202111674642 A CN 202111674642A CN 114538902 A CN114538902 A CN 114538902A
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- bauxite
- anhydrous stemming
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- silicon carbide
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- 238000002360 preparation method Methods 0.000 title abstract description 16
- 239000002994 raw material Substances 0.000 claims abstract description 33
- 229910001570 bauxite Inorganic materials 0.000 claims abstract description 29
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 28
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000010427 ball clay Substances 0.000 claims abstract description 14
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims abstract description 13
- 150000004767 nitrides Chemical class 0.000 claims abstract description 13
- 239000002245 particle Substances 0.000 claims abstract description 13
- 238000007873 sieving Methods 0.000 claims abstract description 13
- 239000010426 asphalt Substances 0.000 claims abstract description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 10
- INJRKJPEYSAMPD-UHFFFAOYSA-N aluminum;silicic acid;hydrate Chemical compound O.[Al].[Al].O[Si](O)(O)O INJRKJPEYSAMPD-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000010439 graphite Substances 0.000 claims abstract description 10
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 10
- 239000010443 kyanite Substances 0.000 claims abstract description 10
- 229910052850 kyanite Inorganic materials 0.000 claims abstract description 10
- 229910052903 pyrophyllite Inorganic materials 0.000 claims abstract description 10
- 229920005989 resin Polymers 0.000 claims abstract description 8
- 239000011347 resin Substances 0.000 claims abstract description 8
- 238000001125 extrusion Methods 0.000 claims description 27
- 238000003756 stirring Methods 0.000 claims description 27
- 239000011265 semifinished product Substances 0.000 claims description 16
- 239000000047 product Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 10
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 8
- 239000005011 phenolic resin Substances 0.000 claims description 8
- 229920001568 phenolic resin Polymers 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 8
- 229920001187 thermosetting polymer Polymers 0.000 claims description 8
- 238000010079 rubber tapping Methods 0.000 abstract description 6
- 239000000203 mixture Substances 0.000 abstract description 3
- 235000011837 pasties Nutrition 0.000 description 10
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 230000003628 erosive effect Effects 0.000 description 4
- 238000009991 scouring Methods 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000007767 bonding agent Substances 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
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Abstract
The invention discloses anhydrous stemming which is prepared from the following raw materials in parts by weight: 12-18 parts of bauxite with the average particle size of 1-3 mm and 12-18 parts of pyrophyllite; 8-12 parts of bauxite with the average particle size of 0-1 mm and 8-12 parts of silicon carbide; 2-4 parts of kyanite with the sieving mesh number not less than 80 meshes; 7-9 parts of bauxite with the sieving mesh number not less than 200 meshes, 5-7 parts of silicon carbide, 10-12 parts of ferrosilicon nitride, 8-10 parts of ball clay and 1.5-2.5 parts of graphite; 2.5-3.5 parts of resin, 6-8 parts of modified asphalt, 10-14 parts of tar and 3-5 parts of silica sol. This application is through optimizing raw materials composition and ratio, and the special ferrosilicon nitride and the silica sol that adopt a certain proportion combine the preparation method that this application provided, can show improvement product bulk density, promote the scour resistance ability, prolong 20 ~ 30min on the 90 ~ 120min basis of the time of tapping of prior art.
Description
Technical Field
The invention belongs to the technical field of preparation of refractory materials, and particularly relates to a refractory material applied to 2000-3000 m3The anhydrous stemming for the blast furnace and the preparation method.
Background
In the prior art, small blast furnaces are gradually replaced by large ironmaking blast furnaces, such as 2000-3000 m3The blast furnace has high smelting strength, has higher requirements on anhydrous stemming for plugging a taphole, requires the anhydrous stemming to have higher volume density, strength and anti-scouring capability, and simultaneously requires the anhydrous stemming to have good sintering performance and longer tapping time. The anhydrous stemming in the prior art cannot meet the requirements at the same timeAnd (6) obtaining.
Disclosure of Invention
The invention aims to solve the defects of the prior art and provide a novel high-efficiency high-speed low-voltage power supply device applied to 2000-3000 m3The anhydrous stemming for the blast furnace and the preparation method.
The purpose of the invention is realized by the following technical scheme:
the anhydrous stemming is prepared from the following raw materials in parts by weight:
12-18 parts of bauxite with the average particle size of 1-3 mm and 12-18 parts of pyrophyllite;
8-12 parts of bauxite with the average particle size of 0-1 mm and 8-12 parts of silicon carbide;
2-4 parts of kyanite with the sieving mesh number not less than 80 meshes;
7-9 parts of bauxite with the sieving mesh number not less than 200 meshes, 5-7 parts of silicon carbide, 10-12 parts of ferrosilicon nitride, 8-10 parts of ball clay and 1.5-2.5 parts of graphite;
2.5-3.5 parts of resin, 6-8 parts of modified asphalt, 10-14 parts of tar and 3-5 parts of silica sol.
Preferably, Al in the bauxite2O3The mass percentage content is more than or equal to 88 percent, the mass percentage content of SiC in the silicon carbide is more than or equal to 90 percent, and Al in the ball clay2O3The mass percentage content is more than or equal to 45 percent
Preferably, the resin is a thermosetting phenolic resin.
Preferably, the silica sol is nano-scale, and the weight percentage content of the silica sol is 25-35%.
The preparation method of the anhydrous stemming comprises the following steps:
firstly, mixing solid raw materials, uniformly stirring, then adding liquid raw materials, continuously stirring, uniformly stirring to obtain a mud-shaped semi-finished product, and carrying out extrusion molding on the mud-shaped semi-finished product by adopting a hydraulic stemming extrusion molding method to obtain an anhydrous stemming product.
Preferably, the temperature of the raw materials in the stirring process is 100-110 ℃.
According to the preparation method, the raw material composition and the proportion are optimized, the ferrosilicon nitride and the silica sol in a certain proportion are particularly adopted, the preparation method provided by the application is combined, the volume density of the product can be obviously improved, the anti-scouring capability is improved, and the tapping time in the prior art is prolonged by 20-30min on the basis of 90-120 min.
Detailed Description
The invention provides anhydrous stemming which is prepared from the following raw materials in parts by weight:
12-18 parts of bauxite with the average particle size of 1-3 mm and 12-18 parts of pyrophyllite;
8-12 parts of bauxite with the average particle size of 0-1 mm and 8-12 parts of silicon carbide;
2-4 parts of kyanite with the sieving mesh number not less than 80 meshes;
7-9 parts of bauxite with the sieving mesh number not less than 200 meshes, 5-7 parts of silicon carbide, 10-12 parts of ferrosilicon nitride, 8-10 parts of ball clay and 1.5-2.5 parts of graphite;
2.5-3.5 parts of resin, 6-8 parts of modified asphalt, 10-14 parts of tar and 3-5 parts of silica sol.
Wherein, bauxite is used as main aggregate and plays a role of a framework; the pyrophyllite is a silicon-aluminum raw material, is low in aluminum and high in silicon, has a good expansion coefficient after being heated, can reduce the erosion effect, and improves the slag erosion resistance. The silicon carbide can fill the aggregate gaps, and improve the slag erosion resistance and the scouring resistance of the silicon carbide. The kyanite is used as an expanding agent, and can reduce the apparent porosity of the stemming. The ferrosilicon nitride can improve the erosion resistance and the scouring resistance of the stemming and improve the strength. The ball clay has high plasticity, improved binding performance, lubricant function and easy extrusion, and the graphite as the carbonaceous material may be used to fill the gaps in aggregate and raise the volume density. The bonding agent of the application adopts resin, modified asphalt and tar, and also uses a certain amount of silica sol, because the silica sol is a nano silica gel body, the specific surface area is large, the bonding agent has good fluidity and is easy to extrude, the high temperature resistance strength can be improved, and the using amount of the asphalt and the tar is reduced.
Therefore, this application is through optimizing raw materials composition and ratio, and the ferrosilicon nitride and the silica sol of specific adoption certain proportion combine the preparation method that this application provided, can show improvement product bulk density, promote the scour resistance ability, prolong 20 ~ 30min on the 90 ~ 120min basis of prior art's time of tapping.
Preferably, Al in bauxite2O3The mass percentage content is more than or equal to 88 percent, the mass percentage content of SiC in the silicon carbide is more than or equal to 90 percent, and Al in the ball clay2O3The mass percentage content is more than or equal to 45 percent
Preferably, the resin is a thermosetting phenolic resin.
Preferably, the silica sol is nano-scale, and the weight percentage content of the silica is 25-35%.
The preparation method of the anhydrous stemming comprises the following steps:
firstly, mixing solid raw materials, uniformly stirring, then adding liquid raw materials, continuously stirring, uniformly stirring to obtain a mud-shaped semi-finished product, and carrying out extrusion molding on the mud-shaped semi-finished product by adopting a hydraulic stemming extrusion molding method to obtain an anhydrous stemming product.
In the prior art, the anhydrous stemming is generally extruded and molded by using spiral extrusion molding equipment, and the raw materials are easy to block a screw, so that certain obstacle is caused to stemming extrusion, and the volume density of the molded stemming is influenced. The application adopts a hydraulic stemming extrusion method, pressure of more than 10Mpa can be provided to directly extrude and mold the stemming from an extrusion port, the stemming extrusion density is obviously improved, and through determination, the anhydrous stemming density obtained by adopting the formula and the method provided by the application can be 1.8-2.0 g/cm3Increased to 2.4g/cm3Left and right.
The hydraulic stemming extrusion device preferably adopts an anhydrous stemming extrusion forming device provided by CN 202120606869.6.
Preferably, the temperature is 100-110 ℃ in the raw material stirring process.
Preferably, the extrusion molding pressure is 1.0-2.0 MPa.
Example 1
The anhydrous stemming provided by the embodiment is prepared from the following raw materials in parts by weight:
15 parts of bauxite with the average particle size of 2mm and 15 parts of pyrophyllite;
10 parts of bauxite with the average grain diameter of 0.5mm and 10 parts of silicon carbide;
3 parts of kyanite with the sieving mesh number not less than 80 meshes;
8 parts of bauxite of 200 meshes, 6 parts of silicon carbide, 11 parts of ferrosilicon nitride, 9 parts of ball clay and 2 parts of graphite;
3 parts of thermosetting phenolic resin, 7 parts of modified asphalt, 12 parts of tar and 4 parts of nano silica sol.
Wherein the bauxite contains Al2O391 percent by mass, 94 percent by mass of SiC in the silicon carbide and Al in the ball clay2O3The mass percentage content is 46 percent.
The preparation method of the anhydrous stemming comprises the following steps:
mixing solid raw materials, stirring at 105 ℃ for 40min, adding liquid raw materials, continuously stirring, stirring for 30min to obtain a pasty semi-finished product, and performing extrusion molding on the pasty semi-finished product by using an anhydrous stemming extrusion molding device provided by CN202120606869.6 to obtain an anhydrous stemming product.
The anhydrous stemming product obtained in the example was analyzed by a conventional method, and had a bulk density of 2.41g/cm3The compressive strength (1350 ℃ for 3h) is 22.8Mpa, the tapping time is 145min, other indexes all meet the standard requirements (the anhydrous stemming industry standard YB/T4196-2099 for blast furnaces), and the method can be well applied to 2000-3000 m3The blast furnace is used.
The volume density of the obtained anhydrous stemming is 2.05g/cm by using a spiral extrusion device for comparison during extrusion3The compressive strength (1350 ℃ for 3h) is 18.7Mpa, and the tapping time is 125 min.
Example 2
The anhydrous stemming provided by the embodiment is prepared from the following raw materials in parts by weight:
15 parts of bauxite with the average particle size of 2mm and 15 parts of pyrophyllite;
10 parts of bauxite with the average grain diameter of 0.5mm and 10 parts of silicon carbide;
3 parts of kyanite with the sieving mesh number not less than 80 meshes;
8 parts of bauxite of 200 meshes, 5 parts of silicon carbide, 12 parts of ferrosilicon nitride, 9 parts of ball clay and 2 parts of graphite;
3 parts of thermosetting phenolic resin, 7 parts of modified asphalt, 12 parts of tar and 3 parts of nano silica sol.
The preparation method of the anhydrous stemming comprises the following steps:
mixing solid raw materials, stirring at 110 ℃ for 40min, adding liquid raw materials, continuously stirring, stirring for 30min to obtain a pasty semi-finished product, and performing extrusion molding on the pasty semi-finished product by using an anhydrous stemming extrusion molding device provided by CN202120606869.6 to obtain an anhydrous stemming product. The other parameters were the same as in example 1.
Example 3
The anhydrous stemming provided by the embodiment is prepared from the following raw materials in parts by weight:
18 parts of bauxite with the average particle size of 2mm and 15 parts of pyrophyllite;
10 parts of bauxite with the average grain diameter of 0.5mm and 10 parts of silicon carbide;
3 parts of kyanite with the sieving mesh number not less than 80 meshes;
5 parts of bauxite of 200 meshes, 6 parts of silicon carbide, 10 parts of ferrosilicon nitride, 9 parts of ball clay and 2 parts of graphite;
3 parts of thermosetting phenolic resin, 7 parts of modified asphalt, 12 parts of tar and 4 parts of nano silica sol.
The preparation method of the anhydrous stemming comprises the following steps:
mixing solid raw materials, stirring at 105 ℃ for 40min, adding liquid raw materials, continuously stirring, stirring for 30min to obtain a pasty semi-finished product, and performing extrusion molding on the pasty semi-finished product by using an anhydrous stemming extrusion molding device provided by CN202120606869.6 to obtain an anhydrous stemming product. The other parameters were the same as in example 1.
Example 4
The anhydrous stemming provided by the embodiment is prepared from the following raw materials in parts by weight:
13 parts of bauxite with the average particle size of 2mm and 13 parts of pyrophyllite;
12 parts of bauxite with the average grain diameter of 0.5mm and 12 parts of silicon carbide;
3 parts of kyanite with the sieving mesh number not less than 80 meshes;
5 parts of bauxite of 200 meshes, 4 parts of silicon carbide, 11 parts of ferrosilicon nitride, 8 parts of ball clay and 2 parts of graphite;
2.5 parts of thermosetting phenolic resin, 6 parts of modified asphalt, 14 parts of tar and 4 parts of nano silica sol.
The preparation method of the anhydrous stemming comprises the following steps:
mixing solid raw materials, stirring at 105 ℃ for 40min, adding liquid raw materials, continuously stirring, stirring for 30min to obtain a pasty semi-finished product, and performing extrusion molding on the pasty semi-finished product by using an anhydrous stemming extrusion molding device provided by CN202120606869.6 to obtain an anhydrous stemming product. The other parameters were the same as in example 1.
Example 5
The anhydrous stemming provided by the embodiment is prepared from the following raw materials in parts by weight:
15 parts of bauxite with the average particle size of 2mm and 18 parts of pyrophyllite;
8 parts of bauxite with the average grain diameter of 0.5mm and 10 parts of silicon carbide;
2 parts of kyanite with the sieving mesh number not less than 80 meshes;
9 parts of bauxite of 200 meshes, 6 parts of silicon carbide, 10 parts of ferrosilicon nitride, 9 parts of ball clay and 2 parts of graphite;
3.5 parts of thermosetting phenolic resin, 8 parts of modified asphalt, 10 parts of tar and 5 parts of nano silica sol.
The preparation method of the anhydrous stemming comprises the following steps:
mixing solid raw materials, stirring at 105 ℃ for 40min, adding liquid raw materials, continuously stirring, stirring for 30min to obtain a pasty semi-finished product, and performing extrusion molding on the pasty semi-finished product by using an anhydrous stemming extrusion molding device provided by CN202120606869.6 to obtain an anhydrous stemming product. The other parameters were the same as in example 1.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention. It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (6)
1. The anhydrous stemming is characterized by being prepared from the following raw materials in parts by weight:
12-18 parts of bauxite with the average particle size of 1-3 mm and 12-18 parts of pyrophyllite;
8-12 parts of bauxite with the average particle size of 0-1 mm and 8-12 parts of silicon carbide;
2-4 parts of kyanite with the sieving mesh number not less than 80 meshes;
7-9 parts of bauxite with the sieving mesh number not less than 200 meshes, 5-7 parts of silicon carbide, 10-12 parts of ferrosilicon nitride, 8-10 parts of ball clay and 1.5-2.5 parts of graphite;
2.5-3.5 parts of resin, 6-8 parts of modified asphalt, 10-14 parts of tar and 3-5 parts of silica sol.
2. Anhydrous stemming as claimed in claim 1,
al in the bauxite2O3The mass percentage content is more than or equal to 88 percent, the mass percentage content of SiC in the silicon carbide is more than or equal to 90 percent, and Al in the ball clay2O3The mass percentage content is more than or equal to 45 percent.
3. Anhydrous stemming according to claim 1,
the resin is a thermosetting phenolic resin.
4. Anhydrous stemming according to claim 1,
the silica sol is nano-scale, and the weight percentage content of the silica sol is 25-35%.
5. The method for preparing anhydrous stemming according to claim 1, comprising the steps of:
firstly, mixing solid raw materials, uniformly stirring, then adding liquid raw materials, continuously stirring, uniformly stirring to obtain a mud-shaped semi-finished product, and carrying out extrusion molding on the mud-shaped semi-finished product by adopting a hydraulic stemming extrusion molding method to obtain an anhydrous stemming product.
6. The method for preparing anhydrous stemming according to claim 5, wherein the temperature during the raw material stirring process is 100-110 ℃.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115321995A (en) * | 2022-06-27 | 2022-11-11 | 无锡市宝宜耐火材料有限公司 | Stemming with good opening performance |
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| CN113149623A (en) * | 2021-01-27 | 2021-07-23 | 河南宏宇新材料科技有限公司 | Environment-friendly high-strength anhydrous stemming and preparation method thereof |
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| JPH02285014A (en) * | 1989-04-27 | 1990-11-22 | Kawasaki Refract Co Ltd | Mud material for tap hole of blast furnace |
| CN101528635A (en) * | 2006-10-20 | 2009-09-09 | 黑崎播磨株式会社 | Mud material |
| CN104557087A (en) * | 2014-12-29 | 2015-04-29 | 张婷 | 900 m<3> blast furnace taphole clay |
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