CN115448707A - Anhydrous stemming and preparation method thereof - Google Patents
Anhydrous stemming and preparation method thereof Download PDFInfo
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- CN115448707A CN115448707A CN202211019601.8A CN202211019601A CN115448707A CN 115448707 A CN115448707 A CN 115448707A CN 202211019601 A CN202211019601 A CN 202211019601A CN 115448707 A CN115448707 A CN 115448707A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- 239000000843 powder Substances 0.000 claims abstract description 22
- 239000011044 quartzite Substances 0.000 claims abstract description 21
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 17
- 239000010431 corundum Substances 0.000 claims abstract description 17
- 239000010427 ball clay Substances 0.000 claims abstract description 15
- 239000007788 liquid Substances 0.000 claims abstract description 12
- 229920005989 resin Polymers 0.000 claims abstract description 12
- 239000011347 resin Substances 0.000 claims abstract description 12
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims abstract description 11
- 150000004767 nitrides Chemical class 0.000 claims abstract description 11
- 239000007767 bonding agent Substances 0.000 claims abstract description 5
- 238000003756 stirring Methods 0.000 claims description 8
- 239000011230 binding agent Substances 0.000 claims description 7
- MWPLVEDNUUSJAV-UHFFFAOYSA-N anthracene Natural products C1=CC=CC2=CC3=CC=CC=C3C=C21 MWPLVEDNUUSJAV-UHFFFAOYSA-N 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 238000007580 dry-mixing Methods 0.000 claims description 5
- 238000005096 rolling process Methods 0.000 claims description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 4
- 239000005011 phenolic resin Substances 0.000 claims description 4
- 229920001187 thermosetting polymer Polymers 0.000 claims description 4
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 3
- 239000000440 bentonite Substances 0.000 claims description 3
- 229910000278 bentonite Inorganic materials 0.000 claims description 3
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 229920001568 phenolic resin Polymers 0.000 claims description 3
- 238000007873 sieving Methods 0.000 claims description 3
- 125000005577 anthracene group Chemical group 0.000 claims description 2
- 239000010426 asphalt Substances 0.000 claims description 2
- 238000000227 grinding Methods 0.000 claims description 2
- 239000001095 magnesium carbonate Substances 0.000 claims description 2
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims description 2
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims description 2
- 235000014380 magnesium carbonate Nutrition 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 239000011819 refractory material Substances 0.000 abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 4
- 229910010271 silicon carbide Inorganic materials 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229910001337 iron nitride Inorganic materials 0.000 description 1
- XWHPIFXRKKHEKR-UHFFFAOYSA-N iron silicon Chemical compound [Si].[Fe] XWHPIFXRKKHEKR-UHFFFAOYSA-N 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/14—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silica
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
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- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
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- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
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- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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- C04B2235/38—Non-oxide ceramic constituents or additives
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- C04B2235/3852—Nitrides, e.g. oxynitrides, carbonitrides, oxycarbonitrides, lithium nitride, magnesium nitride
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Abstract
The invention belongs to the technical field of refractory materials, and discloses anhydrous stemming and a preparation method thereof. The anhydrous stemming comprises the following components: brown corundum aggregate, silica sol, ball clay, liquid bonding agent, ferrosilicon nitride, powder, quartzite and resin. The anhydrous stemming can be applied to 3000-4000 m 3 The blast furnace of (1).
Description
Technical Field
The invention belongs to the technical field of refractory materials, and particularly relates to anhydrous stemming and a preparation method thereof.
Background
The stemming is a refractory material for blocking the tap hole of blast furnace, and during tapping, the stemming in the center of the tap hole is drilled by a drill bit, and hot molten iron and slag flow out from the tap hole, so that the stemming bears the high temperature of more than 1500 ℃. When the iron slag is discharged and the taphole is plugged again by the stemming, the old stemming contacts the stemming of the new taphole, the temperature is rapidly reduced from 1500 ℃ to about 100 ℃, and the repeated action is carried out, so that the aim of plugging the taphole is fulfilled. Therefore, the requirement on the refractory material for the stemming is high.
In the prior art, small blast furnaces are gradually replaced by large ironmaking blast furnaces, such as 3000-4000 m 3 The 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 time.
Therefore, a new anhydrous stemming and a preparation method thereof are urgently needed to be provided.
Disclosure of Invention
The invention aims to provide anhydrous stemming and a preparation method thereof aiming at the defects of the prior art. The anhydrous stemming can be applied to 3000-4000 m 3 The blast furnace of (1).
In order to achieve the above object, a first aspect of the present invention provides an anhydrous stemming, comprising the following components: brown corundum aggregate, silica sol, ball clay, liquid bonding agent, ferrosilicon nitride, powder, quartzite and resin.
According to the present invention, preferably, the anhydrous stemming comprises the following components: 5 to 15 portions of brown corundum aggregate, 10 to 20 portions of silica sol, 6 to 15 portions of ball clay, 10 to 20 portions of liquid bonding agent, 5 to 15 portions of ferrosilicon nitride, 25 to 30 portions of powder, 40 to 60 portions of quartzite and 2 to 7 portions of resin.
According to the present invention, preferably, the anhydrous stemming comprises the following components: 8-12 parts of brown corundum aggregate, 15-20 parts of silica sol, 10-12 parts of ball clay, 10-15 parts of liquid bonding agent, 8-10 parts of ferrosilicon nitride, 25-30 parts of powder, 50-55 parts of quartzite and 2-7 parts of resin.
According to the invention, preferably, al in the brown fused alumina aggregate 2 O 3 The mass percentage content of the compound is more than or equal to 95 percent.
According to the invention, it is preferred that Al is in the ball clay 2 O 3 The mass percentage content of the compound is more than or equal to 45 percent.
According to the invention, preferably, the liquid binder is anthracene oil and/or tar.
According to the present invention, preferably, the powder material is at least one of alumina micropowder, magnesite powder, bentonite powder and asphalt powder.
According to the invention, the particle sizes of the quartzite are respectively 3-1mm, < 0.074mm, and the weight ratio of the quartzite with the particle size of 3-1mm, < 0.074mm is 5: (2-3): (1-2).
According to the present invention, preferably, the resin is a thermosetting phenol resin.
The second aspect of the invention provides a preparation method of anhydrous stemming, which comprises the following steps:
s1: sieving the brown corundum aggregate, and then dry-mixing and stirring the sieved brown corundum aggregate and the powder to obtain a mixture;
s2: and mixing and stirring the mixture, silica sol, ball clay, liquid binder, ferrosilicon nitride, quartzite and resin, rolling, extruding and cutting at a fixed length to obtain the anhydrous stemming.
According to the present invention, preferably, in step S1, the screened mesh size is 1-3mm; the dry mixing stirring is carried out in a mixing and milling tank.
According to the present invention, preferably, in step S2, the duration of the rolling is 20-30min.
The technical scheme of the invention has the following beneficial effects:
(1) The invention adopts quartzite as the main raw material of the stemming, the quartzite has wide resource and high hardness, and the application of the quartzite to the raw material of the stemming can reduce the production cost of the stemming, ensure that the stemming has excellent compressive strength and ensure that the bulk density of the stemming reaches 1.8g/cm 3 The porosity reaches 30 percent, and the compressive strength reaches more than 4.5 (300 ℃,24 hours), so that the anhydrous stemming can be applied to 3000-4000 m 3 The blast furnace of (1).
(2) Al of the Anhydrous stemming of the invention 2 O 3 The mass percentage of the silicon carbide is more than or equal to 50 percent, the mass percentage of SiC and C is more than or equal to 30 percent, the slag iron corrosion resistance, the thermal shock resistance, the oxidation resistance and the wear resistance are good, the rapid sintering property and the volume stability are good, the stemming pressing operation is good, the smoke is less and no smoke is generated when the stemming is used.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the following describes preferred embodiments of the present invention, it should be understood that the present invention may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
Example 1
The embodiment provides anhydrous stemming which comprises the following components: 10 parts of brown corundum aggregate, 15 parts of silica sol, 12 parts of ball clay, 15 parts of anthracene oil, 12 parts of ferrosilicon nitride, 25 parts of bentonite powder, 55 parts of quartzite and 2 parts of thermosetting phenolic resin.
Al in the brown corundum aggregate 2 O 3 The mass percentage content of the compound is more than or equal to 95 percent;
al in the ball clay 2 O 3 The mass percentage content of the compound is more than or equal to 45 percent;
the particle size of the quartzite is 3-1mm, less than 1mm and less than or equal to 0.074mm, and the weight ratio of the quartzite with the particle size of 3-1mm, less than 1mm and less than or equal to 0.074mm is 5:2:1.5;
the preparation method of the anhydrous stemming comprises the following steps:
s1: sieving the brown corundum aggregate (the size of a screen is 1-3 mm), and then dry-mixing and stirring the sieved brown corundum aggregate and the powder in a grinding and mixing box to obtain a mixture;
s2: and mixing and stirring the mixture, silica sol, ball clay, liquid binder, ferrosilicon nitride, quartzite and resin, rolling for 30min, extruding and cutting to length to obtain the anhydrous stemming.
Example 2
The present embodiment provides an anhydrous stemming, and the present embodiment is different from embodiment 1 only in that: the anhydrous stemming comprises the following components: 12 parts of brown corundum aggregate, 20 parts of silica sol, 12 parts of ball clay, 15 parts of anthracene oil, 10 parts of silicon iron nitride, 25 parts of magnesia powder, 50 parts of quartzite and 5 parts of thermosetting phenolic resin.
Example 3
The present embodiment provides an anhydrous stemming, and the present embodiment is different from embodiment 1 only in that: the powder is alumina micro powder.
Test example
In this test example, the bulk density of the anhydrous stemming of the above examples 1 to 3 was measured in accordance with "test method for apparent porosity and bulk density of dense castable refractory" YB/T5200-1993;
according to the test method for the normal temperature compressive strength of the refractory material GB/T5072-2008, the 300 ℃ compressive strength of the anhydrous stemming of the embodiment 1-3 is detected;
the Al in the above examples 1 to 3 was analyzed according to GB/T16555-2008 "method for chemical analysis of refractory containing carbon, silicon carbide and nitride 2 O 3 And detecting the content of SiC and C.
The results are shown in Table 1.
TABLE 1
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (10)
1. An anhydrous stemming, which is characterized by comprising the following components: brown corundum aggregate, silica sol, ball clay, liquid bonding agent, ferrosilicon nitride, powder, quartzite and resin.
2. The anhydrous stemming of claim 1, wherein the anhydrous stemming comprises: 5-15 parts of brown corundum aggregate, 10-20 parts of silica sol, 6-15 parts of ball clay, 10-20 parts of liquid binder, 5-15 parts of ferrosilicon nitride, 25-30 parts of powder, 40-60 parts of quartzite and 2-7 parts of resin.
3. The anhydrous stemming according to claim 2, wherein the anhydrous stemming comprises the following components: 8-12 parts of brown corundum aggregate, 15-20 parts of silica sol, 10-12 parts of ball clay, 10-15 parts of liquid binder, 8-10 parts of ferrosilicon nitride, 25-30 parts of powder, 50-55 parts of quartzite and 2-7 parts of resin.
4. Anhydrous stemming as claimed in claim 1, wherein,
al in the brown corundum aggregate 2 O 3 The mass percentage content of the compound is more than or equal to 95 percent;
al in the ball clay 2 O 3 The mass percentage content of the compound is more than or equal to 45 percent.
5. The anhydrous stemming according to claim 1, wherein the liquid binder is anthracene oil and/or tar.
6. The anhydrous stemming according to claim 1, wherein the powder material is at least one of alumina micropowder, magnesite powder, bentonite powder, and asphalt powder.
7. The anhydrous stemming as claimed in claim 1, wherein the quartzite particle size is 3-1mm, < 0.074mm, the weight ratio of the quartzite particle size of 3-1mm, < 0.074mm is 5: (2-3): (1-2).
8. The anhydrous stemming of claim 1, wherein the resin is a thermosetting phenolic resin.
9. The preparation method of the anhydrous stemming is characterized by comprising the following steps:
s1: sieving the brown corundum aggregate, and then dry-mixing and stirring the sieved brown corundum aggregate and the powder to obtain a mixture;
s2: and mixing and stirring the mixture, silica sol, ball clay, liquid binder, ferrosilicon nitride, quartzite and resin, rolling, extruding and cutting at a fixed length to obtain the anhydrous stemming.
10. The method for producing an anhydrous stemming according to claim 9,
in step S1, the size of the sieved screen is 1-3mm; the dry mixing and stirring are carried out in a grinding and mixing box;
in step S2, the rolling time is 20-30min.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108558420A (en) * | 2018-05-24 | 2018-09-21 | 浙江长兴宝晟炉料有限公司 | A kind of preparation method of environmental protection anhydrous stemming |
| CN108640662A (en) * | 2018-07-17 | 2018-10-12 | 北京瑞普同创科技发展有限公司 | Environment-friendly type anhydrous stemming |
| CN110272264A (en) * | 2019-05-21 | 2019-09-24 | 上海宝钢工业技术服务有限公司 | Anhydrous stemming and preparation method for blast furnace |
| CN110981447A (en) * | 2019-12-20 | 2020-04-10 | 郑州市瑞沃耐火材料有限公司 | Carbon composite anhydrous stemming for large-scale blast furnace and preparation method thereof |
| CN113860891A (en) * | 2021-09-28 | 2021-12-31 | 中冶检测认证有限公司 | Single-field anhydrous stemming for high-strength smelting small blast furnace and preparation method and application thereof |
| CN114315331A (en) * | 2021-12-31 | 2022-04-12 | 北京瑞普同创科技发展有限公司 | Silica low-cost stemming and manufacturing method thereof |
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| CN108558420A (en) * | 2018-05-24 | 2018-09-21 | 浙江长兴宝晟炉料有限公司 | A kind of preparation method of environmental protection anhydrous stemming |
| CN108640662A (en) * | 2018-07-17 | 2018-10-12 | 北京瑞普同创科技发展有限公司 | Environment-friendly type anhydrous stemming |
| CN110272264A (en) * | 2019-05-21 | 2019-09-24 | 上海宝钢工业技术服务有限公司 | Anhydrous stemming and preparation method for blast furnace |
| CN110981447A (en) * | 2019-12-20 | 2020-04-10 | 郑州市瑞沃耐火材料有限公司 | Carbon composite anhydrous stemming for large-scale blast furnace and preparation method thereof |
| CN113860891A (en) * | 2021-09-28 | 2021-12-31 | 中冶检测认证有限公司 | Single-field anhydrous stemming for high-strength smelting small blast furnace and preparation method and application thereof |
| CN114315331A (en) * | 2021-12-31 | 2022-04-12 | 北京瑞普同创科技发展有限公司 | Silica low-cost stemming and manufacturing method thereof |
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