CN117401963B - Anhydrous stemming and preparation method thereof - Google Patents
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- CN117401963B CN117401963B CN202311488545.7A CN202311488545A CN117401963B CN 117401963 B CN117401963 B CN 117401963B CN 202311488545 A CN202311488545 A CN 202311488545A CN 117401963 B CN117401963 B CN 117401963B
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- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 229910001570 bauxite Inorganic materials 0.000 claims abstract description 44
- FQENQNTWSFEDLI-UHFFFAOYSA-J sodium diphosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])([O-])=O FQENQNTWSFEDLI-UHFFFAOYSA-J 0.000 claims abstract description 25
- 229940048086 sodium pyrophosphate Drugs 0.000 claims abstract description 25
- 235000019818 tetrasodium diphosphate Nutrition 0.000 claims abstract description 25
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims abstract description 25
- 239000004927 clay Substances 0.000 claims abstract description 15
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 15
- 239000010431 corundum Substances 0.000 claims abstract description 15
- 239000010426 asphalt Substances 0.000 claims abstract description 8
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 8
- 229910052582 BN Inorganic materials 0.000 claims abstract description 7
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000000571 coke Substances 0.000 claims abstract description 7
- 229910021487 silica fume Inorganic materials 0.000 claims abstract description 7
- 239000002994 raw material Substances 0.000 claims abstract description 6
- -1 2-methoxyphenoxy ethylamine hydrochloride Chemical compound 0.000 claims abstract description 3
- 239000002245 particle Substances 0.000 claims description 30
- KNWPXZOMSZABHD-UHFFFAOYSA-N 2-(2-methoxyphenoxy)ethanamine;hydrochloride Chemical compound Cl.COC1=CC=CC=C1OCCN KNWPXZOMSZABHD-UHFFFAOYSA-N 0.000 claims description 22
- 238000002156 mixing Methods 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 10
- 238000001125 extrusion Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 2
- 229910000366 copper(II) sulfate Inorganic materials 0.000 claims 1
- JZCCFEFSEZPSOG-UHFFFAOYSA-L copper(II) sulfate pentahydrate Chemical compound O.O.O.O.O.[Cu+2].[O-]S([O-])(=O)=O JZCCFEFSEZPSOG-UHFFFAOYSA-L 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 3
- 239000013078 crystal Substances 0.000 abstract description 2
- 239000004575 stone Substances 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 13
- 238000003756 stirring Methods 0.000 description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 5
- INJRKJPEYSAMPD-UHFFFAOYSA-N aluminum;silicic acid;hydrate Chemical compound O.[Al].[Al].O[Si](O)(O)O INJRKJPEYSAMPD-UHFFFAOYSA-N 0.000 description 4
- 239000010443 kyanite Substances 0.000 description 4
- 229910052850 kyanite Inorganic materials 0.000 description 4
- 239000012257 stirred material Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 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
- 230000002925 chemical effect Effects 0.000 description 1
- 229910052570 clay Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000002893 slag Substances 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
- C04B35/10—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 aluminium oxide
- C04B35/101—Refractories from grain sized mixtures
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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
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
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- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- 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
- C04B2235/3427—Silicates other than clay, e.g. water glass
- C04B2235/3463—Alumino-silicates other than clay, e.g. mullite
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
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- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- 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
- C04B2235/349—Clays, e.g. bentonites, smectites such as montmorillonite, vermiculites or kaolines, e.g. illite, talc or sepiolite
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- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
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- C04B2235/44—Metal salt constituents or additives chosen for the nature of the anions, e.g. hydrides or acetylacetonate
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Abstract
The invention relates to the technical field of iron-making auxiliary materials, and provides anhydrous stemming and a preparation method thereof, wherein the anhydrous stemming comprises the following raw materials in parts by weight: 40-50 parts of bauxite, 20-30 parts of corundum, 10-15 parts of silica fume, 40-50 parts of silicon carbide, 5-8 parts of boron nitride, 3-4 parts of blue crystal stone, 5-10 parts of coke, 8-14 parts of asphalt, 7-10 parts of clay, 20-26 parts of tar, 2-3 parts of 2-methoxyphenoxy ethylamine hydrochloride and 4-6 parts of sodium pyrophosphate. Through the technical scheme, the problems of small volume density, low flexural strength and low compressive strength of anhydrous stemming in the related technology are solved.
Description
Technical Field
The invention relates to the technical field of iron-making auxiliary materials, in particular to anhydrous stemming and a preparation method thereof.
Background
Stemming is classified into watered stemming and anhydrous stemming according to the difference of binders, and anhydrous stemming refers to stemming manufactured by using tar, resin and the like as binders and corundum, bauxite, clay, silicon carbide, coke powder and the like as raw materials. Stemming is a refractory material for blocking a tap hole of an iron-making blast furnace, and the performance of the stemming is directly related to whether the blast furnace can safely run or not.
The tap hole of the blast furnace is repeatedly opened and filled for a plurality of times, and the hot molten iron and slag can produce physical and chemical effects on stemming, so that anhydrous stemming is damaged. In order to make the working state of the tap hole more stable, and meet the requirement of the reinforced smelting of the blast furnace, the volume density of the anhydrous stemming needs to be increased, and the flexural strength and the compressive strength of the anhydrous stemming are improved.
Disclosure of Invention
The invention provides anhydrous stemming and a preparation method thereof, which solve the problems of small volume density, low flexural strength and low compressive strength of the anhydrous stemming in the related art.
The technical scheme of the invention is as follows:
the anhydrous stemming comprises the following raw materials in parts by weight: 40-50 parts of bauxite, 20-30 parts of corundum, 10-15 parts of silica fume, 40-50 parts of silicon carbide, 5-8 parts of boron nitride, 3-4 parts of blue crystal stone, 5-10 parts of coke, 8-14 parts of asphalt, 7-10 parts of clay, 20-26 parts of tar, 2-3 parts of 2-methoxyphenoxy ethylamine hydrochloride and 4-6 parts of sodium pyrophosphate.
As a further technical scheme, the mass ratio of the sodium pyrophosphate to the 2-methoxyphenoxyethylamine hydrochloride is 0.2-5:1.
As a further technical scheme, the mass ratio of the sodium pyrophosphate to the 2-methoxyphenoxyethylamine hydrochloride is 0.5-2:1.
As a further technical scheme, the mass ratio of the sodium pyrophosphate to the 2-methoxyphenoxyethylamine hydrochloride is 1:1.
The invention discovers that when the mass ratio of sodium pyrophosphate to 2-methoxyphenoxyethylamine hydrochloride is 0.5-2:1, the flexural strength, compressive strength and bulk density of the anhydrous stemming can be improved, and when the mass ratio of sodium pyrophosphate to 2-methoxyphenoxyethylamine hydrochloride is 1:1, the flexural strength, compressive strength and bulk density of the anhydrous stemming can be further improved.
As a further technical scheme, the bauxite consists of coarse bauxite and fine bauxite, wherein the particle size of the coarse bauxite is 3-5mm, and the particle size of the fine bauxite is less than or equal to 1mm.
As a further technical scheme, the mass ratio of the coarse bauxite to the fine bauxite is 1:1-2.
As a further embodiment, the clay is a soft refractory clay.
As a further technical scheme, the corundum is one of brown corundum and white corundum.
As a further technical scheme, the corundum is brown corundum.
As a further technical scheme, the particle size of the corundum is 24-36 meshes.
The invention also discloses a preparation method of the anhydrous stemming, which comprises the following steps:
S1, uniformly mixing other raw materials except tar to obtain a mixture;
s2, adding tar into the mixture, uniformly mixing, and extruding and forming to obtain anhydrous stemming.
As a further technical scheme, the rotating speed of the mixing in the step S1 is 400-600r/min, and the mixing time is 1-3min.
As a further technical scheme, the temperature of mixing in the S1 and the temperature of mixing in the S2 are respectively and independently 40-60 ℃.
As a further technical scheme, the extrusion temperature in the step S2 is 45-60 ℃.
As a further technical scheme, the rotating speed of the mixing in the step S2 is 500-700r/min, and the mixing time is 20-30min.
The working principle and the beneficial effects of the invention are as follows:
1. According to the invention, the anhydrous stemming takes bauxite, corundum, silica fume, silicon carbide, boron nitride, kyanite and coke as main components, the flexural strength and compressive strength of the anhydrous stemming are improved through the cooperation of the materials, and 2-methoxyphenoxyethylamine hydrochloride is also added, so that the cohesiveness of asphalt can be improved, and the flexural strength and compressive strength of the anhydrous stemming can be further improved through the cooperation with sodium pyrophosphate, the volume density and the thermal stability of the anhydrous stemming are improved.
2. In the invention, the bauxite consists of the coarse bauxite and the fine bauxite, and the rupture strength and the compressive strength of the anhydrous stemming can be further improved and the volume density can be increased by limiting the particle sizes and the proportion of the coarse bauxite and the fine bauxite.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below 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 one of ordinary skill 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.
In the following examples and comparative examples:
asphalt: model 10#, softening point 103 ℃, petroleum company in manufacturer;
the clay is soft clay: model 01, specification 325 mesh, manufacturer Gongyi Xuan tolerance Co., ltd;
Tar: and 6. The product number is manufactured by Dongguang county Chemicals Limited company.
Example 1
The preparation method of the anhydrous stemming comprises the following steps:
S1, adding 40 parts of bauxite, 20 parts of brown alumina (with a particle size of 24 meshes), 10 parts of silica fume (with a particle size of 2000 meshes), 40 parts of silicon carbide (with a particle size of 1-3 mm), 5 parts of boron nitride (with a particle size of 200 meshes), 3 parts of kyanite (with a particle size of 80 meshes), 5 parts of coke (with a particle size of 25 mm), 8 parts of asphalt, 7 parts of clay, 2 parts of 2-methoxyphenoxyethylamine hydrochloride and 4 parts of sodium pyrophosphate into a stirrer, and stirring at a rotating speed of 600r/min for 1min at 40 ℃ to obtain a mixture; the bauxite consists of coarse bauxite (particle size is 3-5 mm) and fine bauxite (particle size is more than or equal to 0 mm) with the mass ratio of 1:1;
S1, adding 20 parts of tar into the mixture, continuously stirring for 20min at the temperature of 40 ℃ at the rotating speed of 700r/min, controlling the temperature of the stirred material to be 45 ℃, and extruding and forming to obtain anhydrous stemming.
Example 2
The preparation method of the anhydrous stemming comprises the following steps:
S1, adding 45 parts of bauxite, 25 parts of brown alumina (with a particle size of 30 meshes), 13 parts of silica fume (with a particle size of 2000 meshes), 45 parts of silicon carbide (with a particle size of 1-3 mm), 6 parts of boron nitride (with a particle size of 200 meshes), 3.5 parts of kyanite (with a particle size of 80 meshes), 8 parts of coke (with a particle size of 25 mm), 10 parts of asphalt, 8 parts of clay, 3 parts of 2-methoxyphenoxyethylamine hydrochloride and 6 parts of sodium pyrophosphate into a stirrer, and stirring at a rotating speed of 500r/min for 2min at 50 ℃ to obtain a mixture; the bauxite consists of coarse bauxite (particle size is 3-5 mm) and fine bauxite (particle size is more than or equal to 0 mm) with the mass ratio of 1:1;
S1, adding 22 parts of tar into the mixture, continuously stirring for 25min at the temperature of 50 ℃ at the rotating speed of 600r/min, controlling the temperature of the stirred material to be 50 ℃, and extruding and forming to obtain anhydrous stemming.
Example 3
The preparation method of the anhydrous stemming comprises the following steps:
s1, adding 50 parts of bauxite, 30 parts of brown alumina (with a particle size of 36 meshes), 15 parts of silica fume (with a particle size of 2000 meshes), 50 parts of silicon carbide (1-3 mm), 8 parts of boron nitride (with a particle size of 200 meshes), 4 parts of kyanite (with a particle size of 80 meshes), 10 parts of coke (with a particle size of 25 mm), 14 parts of asphalt, 10 parts of clay, 4 parts of 2-methoxyphenoxyethylamine hydrochloride and 8 parts of sodium pyrophosphate into a stirrer, and stirring at a rotation speed of 400r/min for 3min at 60 ℃ to obtain a mixture; the bauxite consists of coarse bauxite (particle size is 3-5 mm) and fine bauxite (particle size is more than or equal to 0 mm) with the mass ratio of 1:1;
s1, adding 26 parts of tar into the mixture, continuously stirring for 30min at the temperature of 60 ℃ at the rotating speed of 500r/min, controlling the temperature of the stirred material to be 60 ℃, and extruding and forming to obtain anhydrous stemming.
Example 4
This example differs from example 1 in that 3 parts of 2-methoxyphenoxyethylamine hydrochloride and 3 parts of sodium pyrophosphate.
Example 5
This example differs from example 1 in that 4 parts of 2-methoxyphenoxyethylamine hydrochloride, 2 parts of sodium pyrophosphate.
Example 6
This example differs from example 1 in that 1 part of 2-methoxyphenoxyethylamine hydrochloride and 5 parts of sodium pyrophosphate.
Example 7
This example differs from example 1 in that 5 parts of 2-methoxyphenoxyethylamine hydrochloride and 1 part of sodium pyrophosphate.
Example 8
This example differs from example 1 in that the mass ratio of coarse bauxite to fine bauxite is 1:1.5.
Example 9
This example differs from example 1 in that the mass ratio of coarse bauxite to fine bauxite is 1:2.
Comparative example 1
This comparative example differs from example 1 in that 2-methoxyphenoxyethylamine hydrochloride and sodium pyrophosphate are not added.
Comparative example 2
This comparative example differs from example 1 in that 2-methoxyphenoxyethylamine hydrochloride was not added.
Comparative example 3
This comparative example differs from example 1 in that sodium pyrophosphate was not added.
Test examples
The properties of the anhydrous stemming in examples 1-9 and comparative examples 1-3 were measured as follows:
(1) The compressive strength is measured by referring to the measurement method in YB/T5115-2014, namely clay refractory and high alumina refractory plastic, and the size of the sample is as follows: 114mm x 65mm, measuring conditions 1350 ℃ x 3h;
(2) The flexural strength was measured by referring to the measurement method in YB/T5115-2014, clay and high alumina refractory Plastic, the sample size was: 230mm x 114mm x 65mm, measuring conditions 1350 ℃ x 3h;
the measurement results are shown in Table 1.
TABLE 1 results of Performance measurements of Anhydrous stemming in examples 1-9 and comparative examples 1-3
The difference of comparative example 1 from example 1 is that 2-methoxyphenoxyethylamine hydrochloride and sodium pyrophosphate are not added, and 2-methoxyphenoxyethylamine hydrochloride and sodium pyrophosphate are not added in comparative example 2, and as a result, the flexural strength, compressive strength and bulk density of anhydrous stemming in comparative examples 1 to 3 are all lower than those of example 1, indicating that the simultaneous addition of 2-methoxyphenoxyethylamine hydrochloride and sodium pyrophosphate can improve the flexural strength, compressive strength and bulk density of anhydrous stemming.
As compared with example 1, the addition amount of 2-methoxyphenoxyethylamine hydrochloride and sodium pyrophosphate is changed in examples 4-7, and the comparison shows that the flexural strength, compressive strength and volume density of the anhydrous stemming in examples 1 and 4-5 are higher than those of examples 6-7, so that the flexural strength, compressive strength and volume density of the anhydrous stemming can be better improved when the mass ratio of 2-methoxyphenoxyethylamine hydrochloride to sodium pyrophosphate is 0.5-2:1.
As is evident from comparative examples 1 and 4 to 5, the flexural strength, compressive strength and bulk density of the anhydrous stemming in example 4 are all higher than those of examples 1 and 5, indicating that the flexural strength, compressive strength and bulk density of the anhydrous stemming can be further improved when the mass ratio of 2-methoxyphenoxyethylamine hydrochloride to sodium pyrophosphate is 1:1.
As a result of changing the ratio of coarse bauxite to fine bauxite in examples 8 to 9 as compared with example 1, the flexural strength, compressive strength and bulk density of the anhydrous stemming in example 8 were all greater than those in examples 1 and 9, indicating that the flexural strength, compressive strength and bulk density of the anhydrous stemming could be further improved when the mass ratio of coarse bauxite to fine bauxite was 1:1.5.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (9)
1. The anhydrous stemming is characterized by comprising the following raw materials in parts by weight: 40-50 parts of bauxite, 20-30 parts of corundum, 10-15 parts of silica fume, 40-50 parts of silicon carbide, 5-8 parts of boron nitride, 3-4 parts of blue stone, 5-10 parts of coke, 8-14 parts of asphalt, 7-10 parts of clay, 20-26 parts of tar, 2-3 parts of 2-methoxyphenoxy ethylamine hydrochloride and 4-6 parts of sodium pyrophosphate;
the mass ratio of the sodium pyrophosphate to the 2-methoxyphenoxyethylamine hydrochloride is 2:1.
2. The anhydrous stemming of claim 1, wherein the bauxite is comprised of coarse bauxite and fine bauxite, the coarse bauxite having a particle size of 3 to 5mm and the fine bauxite having a particle size of: the grain diameter is more than or equal to 1mm and is more than 0mm.
3. The anhydrous stemming of claim 2, wherein the mass ratio of coarse bauxite to fine bauxite is from 1:1 to 2.
4. The anhydrous stemming of claim 1, wherein the clay is a soft refractory clay.
5. The anhydrous stemming of claim 1, wherein the corundum is one of brown corundum and white corundum.
6. An anhydrous stemming according to claim 1, wherein the corundum has a particle size of 24-36 mesh.
7. The method for preparing anhydrous stemming according to any one of claims 1-6, comprising the steps of:
S1, uniformly mixing other raw materials except tar to obtain a mixture;
s2, adding tar into the mixture, uniformly mixing, and extruding and forming to obtain anhydrous stemming.
8. The preparation method of anhydrous stemming according to claim 7, wherein the mixing speed in the step S1 is 400-600r/min and the mixing time is 1-3min.
9. The method for preparing anhydrous stemming according to claim 7, wherein the extrusion temperature in S2 is 45-60 ℃.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101528635A (en) * | 2006-10-20 | 2009-09-09 | 黑崎播磨株式会社 | Mud material |
| CN106336493A (en) * | 2016-08-31 | 2017-01-18 | 山东圣泉新材料股份有限公司 | Application of high molecular prepolymer with long storage period to gun mud |
| CN106699206A (en) * | 2016-12-26 | 2017-05-24 | 中国京冶工程技术有限公司 | Anhydrous stemming for large and medium sized blast furnace and preparation method of anhydrous stemming |
| CN115979087A (en) * | 2023-02-14 | 2023-04-18 | 中钢集团马鞍山矿山研究总院股份有限公司 | Method for blocking blasting blast hole based on liquid-state plug |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101528635A (en) * | 2006-10-20 | 2009-09-09 | 黑崎播磨株式会社 | Mud material |
| CN106336493A (en) * | 2016-08-31 | 2017-01-18 | 山东圣泉新材料股份有限公司 | Application of high molecular prepolymer with long storage period to gun mud |
| CN106699206A (en) * | 2016-12-26 | 2017-05-24 | 中国京冶工程技术有限公司 | Anhydrous stemming for large and medium sized blast furnace and preparation method of anhydrous stemming |
| CN115979087A (en) * | 2023-02-14 | 2023-04-18 | 中钢集团马鞍山矿山研究总院股份有限公司 | Method for blocking blasting blast hole based on liquid-state plug |
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