CN112723869A - Iron runner castable containing two carbon sources and preparation method thereof - Google Patents
Iron runner castable containing two carbon sources and preparation method thereof Download PDFInfo
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- CN112723869A CN112723869A CN202110210836.4A CN202110210836A CN112723869A CN 112723869 A CN112723869 A CN 112723869A CN 202110210836 A CN202110210836 A CN 202110210836A CN 112723869 A CN112723869 A CN 112723869A
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Abstract
The invention belongs to the technical field of refractory materials, and discloses an iron runner castable containing two carbon sources and a preparation method thereof, wherein the iron runner castable comprises the following raw materials in percentage by mass: 55-60% of brown corundum, 22-25% of silicon carbide, 2-5% of carbon material, 2-3% of binding agent, 8.0-8.8% of superfine powder, 0.1-0.4% of composite explosion-proof agent, 2-4% of antioxidant and 0.1-0.2% of dispersing agent. Al prepared by the invention in the prior art2O3On the basis of the-SiC-C iron runner castable, the carbon material containing two carbon sources of carbon black and spherical asphalt is provided to adjust the variety and content of the carbon material, and compared with the castable only containing the spherical asphalt carbon material, the castable provided by the invention has the advantages of excellent normal temperature and high temperature performances and good industrial application prospect.
Description
Technical Field
The invention relates to the technical field of refractory materials, in particular to an iron runner castable containing two carbon sources and a preparation method thereof.
Background
The blast furnace tapping channel is a channel for high-temperature molten iron and molten slag, and the iron channel castable is an unshaped refractory used in the channel and is one of main refractory used in front of the blast furnace, and accounts for more than 70%. The iron runner castable is periodically subjected to molten iron scouring, slag erosion and high-temperature thermal stress, so that the requirements on the iron runner castable are as follows: high temperature resistance, erosion resistance, scouring resistance, permeation resistance and high thermal conductivity. The performance of the iron runner castable is good and bad, the service life is long, and the iron flux directly influences the production cost, the labor intensity and the working environment.
At present, Al is mostly used in large and medium blast furnace casting yards in China2O3-SiC-C iron runner castable, ordinary Al2O3When the-SiC-C iron runner castable is used on a blast furnace, the once iron feeding amount is about 12 ten thousand tons. With the development of large-scale blast furnace smelting technology, the temperature of molten iron is higher, the iron introducing amount is more, the iron introducing time is longer, the phenomena of scouring, abrasion and erosion of high-temperature molten iron and slag on an iron tapping channel are more serious, and the more rigorous requirement is provided for refractory materials for the iron tapping channel, so that Al with more excellent performance is developed2O3the-SiC-C iron runner castable has become the primary target of a plurality of refractory manufacturers.
Disclosure of Invention
The invention aims to provide an iron runner castable containing two carbon sources and a preparation method thereof, wherein the castable is Al prepared in the prior art2O3On the basis of the-SiC-C iron runner castable, the invention provides a carbon material containing two carbon sources of carbon black and spherical asphalt to adjust the variety and content of the carbon material, compared with the castable only containing the spherical asphalt carbon material, the invention has more excellent normal temperature and high temperature performance, and is industrially usedThe prospect is good.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides an iron runner castable containing two carbon sources, which comprises the following raw materials in percentage by mass: 55-60% of brown corundum, 22-25% of silicon carbide, 2-5% of carbon material, 2-3% of binding agent, 8.0-8.8% of superfine powder, 0.1-0.4% of composite explosion-proof agent, 2-4% of antioxidant and 0.1-0.2% of dispersing agent.
Preferably, in the iron runner castable material containing two carbon sources, Al in the brown corundum2O3The content is not less than 95%.
Preferably, in the iron runner castable material containing two carbon sources, the purity of the silicon carbide is not lower than 97%, and the silicon carbide is composed of particles and fine powder in a mass ratio of 1-3: 1-2; wherein the particle size is 0.01-1mm, and the particle size of the fine powder is 180-325 meshes.
Preferably, in the iron runner castable material containing two carbon sources, the carbon material is a mixture of spherical asphalt and carbon black in a mass ratio of 1-3:1, and the carbon black is N990 granular carbon black.
Preferably, in the above iron runner castable material containing two carbon sources, the binder is pure calcium aluminate cement.
Preferably, in the iron runner castable material containing two carbon sources, the superfine powder is silicon powder and alpha-Al powder in a mass ratio of 1:1-32O3A mixture of micro powders.
Preferably, in the iron runner castable material containing two carbon sources, the composite explosion-proof agent is a mixture of organic fibers and metal Al powder in a mass ratio of 1-2: 1-3; the organic fiber is one of polyester fiber, acrylic fiber, polyamide fiber or polypropylene fiber.
Preferably, in the iron runner castable material containing two carbon sources, the antioxidant is metal Si powder and B with the mass ratio of 1-2:1-34C, mixtures thereof.
Preferably, in the iron runner castable material containing two carbon sources, the dispersant is sodium tripolyphosphate.
The invention also provides a preparation method of the iron runner castable material containing two carbon sources, which is characterized by comprising the following steps:
weighing the raw materials according to a certain proportion, adding the raw materials into a stirrer, dry-mixing and stirring for 1-2min, then adding water accounting for 4.2-4.5% of the total mass of the weighed raw materials, stirring for 3-5min, putting the mixture into a mould after uniformly stirring, and sequentially vibrating, maintaining and baking to obtain the iron runner castable containing two carbon sources.
Through the technical scheme, compared with the prior art, the invention has the following beneficial effects:
(1) al prepared by the invention in the prior art2O3the-SiC-C iron runner castable is further modified on the basis of the-SiC-C iron runner castable, provides a carbon material containing two carbon sources of carbon black and spherical asphalt, and solves the problems of short service life and poor performance of the iron runner castable prepared only by adopting the spherical asphalt in the prior art.
(2) The iron runner castable prepared by the invention has more excellent normal-temperature and high-temperature performances and good industrial application prospect.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
An iron runner castable containing two carbon sources consists of the raw materials with the mass percentage as listed in Table 1.
Table 1 example 1 raw material composition of iron runner castable
The preparation method comprises the following steps: weighing the raw materials in proportion, adding into a stirrer, stirring for 1.5min, adding water accounting for 4.2% of the total weight of the raw materials, stirring for 3min, uniformly stirring, and placing into a mold to obtain a sample of 40 × 40 × 160 mm. And naturally curing the prepared sample for 24 hours, and drying the sample at 110 ℃ for 24 hours to detect the performance indexes of normal temperature and high temperature.
Example 2
An iron runner castable containing two carbon sources consists of the raw materials with the mass percentage as listed in Table 2.
Table 2 example 2 raw material composition of iron runner castable
The preparation method comprises the following steps: weighing the raw materials in proportion, adding into a stirrer, stirring for 2min, adding water accounting for 4.5% of the total weight of the raw materials, stirring for 5min, stirring uniformly, and placing into a mold to obtain a sample of 40 × 40 × 160 mm. And naturally curing the prepared sample for 24 hours, and drying the sample at 110 ℃ for 24 hours to detect the performance indexes of normal temperature and high temperature.
Comparative example 1
An iron runner castable containing only spherical asphalt carbon sources, wherein N990 granular carbon black in example 1 was replaced by spherical asphalt, and the remaining raw materials were the same as in example 1, and the raw material composition is shown in Table 3:
TABLE 3 raw material composition of iron runner castable of comparative example 1
The preparation method comprises the following steps: weighing the raw materials in proportion, adding into a stirrer, stirring for 1.5min, adding water accounting for 4.2% of the total weight of the raw materials, stirring for 3min, uniformly stirring, and placing into a mold to obtain a sample of 40 × 40 × 160 mm. And naturally curing the prepared sample for 24 hours, and drying the sample at 110 ℃ for 24 hours to detect the performance indexes of normal temperature and high temperature.
Comparative example 2
An iron runner castable containing only spherical asphalt as a carbon source was prepared by replacing the N990 granular carbon black of example 2 with spherical asphalt, and the remaining raw materials were the same as those of example 2, and the composition of the raw materials was as shown in Table 4:
table 4 raw material composition of iron runner castable of comparative example 2
The preparation method comprises the following steps: weighing the raw materials in proportion, adding into a stirrer, stirring for 2min, adding water accounting for 4.5% of the total weight of the raw materials, stirring for 5min, stirring uniformly, and placing into a mold to obtain a sample of 40 × 40 × 160 mm. And naturally curing the prepared sample for 24 hours, and drying the sample at 110 ℃ for 24 hours to detect the performance indexes of normal temperature and high temperature.
The results of the normal temperature and high temperature measurements of the samples prepared in inventive examples 1-2 and comparative examples 1-2 are shown in Table 5. The performance detection method adopted by the invention is carried out according to the current national standard or industry standard, and the obtained detection result is the average detection result of 3 times.
TABLE 5 iron runner castable Performance test results
As can be seen from table 5, the normal temperature, high temperature bending strength and compressive strength of the iron runner castable prepared in the embodiment of the present invention are higher than those of the comparative examples, which indicates that the iron runner castable containing two carbon sources of the present invention has good normal temperature and high temperature performance, while the iron hook castable containing only spherical asphalt commonly used in the prior art cannot achieve the technical effect of the present invention, and the present invention has good industrial application prospects.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The iron runner castable containing two carbon sources is characterized by comprising the following raw materials in percentage by mass: 55-60% of brown corundum, 22-25% of silicon carbide, 2-5% of carbon material, 2-3% of binding agent, 8.0-8.8% of superfine powder, 0.1-0.4% of composite explosion-proof agent, 2-4% of antioxidant and 0.1-0.2% of dispersing agent.
2. The iron runner castable material containing two carbon sources as claimed in claim 1, wherein Al in brown corundum2O3The content is not less than 95%.
3. The iron runner castable material containing two carbon sources as claimed in claim 1, wherein the silicon carbide has a purity of not less than 97% and consists of particles and fine powder in a mass ratio of 1-3: 1-2; wherein the particle size is 0.01-1mm, and the particle size of the fine powder is 180-325 meshes.
4. The iron runner casting material containing two carbon sources as claimed in claim 1, wherein the carbon material is a mixture of spherical asphalt and carbon black in a mass ratio of 1-3:1, and the carbon black is N990 granular carbon black.
5. The iron runner castable material containing two carbon sources according to claim 1, wherein the binder is pure calcium aluminate cement.
6. The iron runner castable material containing two carbon sources as claimed in claim 1, wherein the ultrafine powder is silica micropowder and alpha-Al in a mass ratio of 1:1-32O3A mixture of micro powders.
7. The iron runner castable material containing two carbon sources as claimed in claim 1, wherein the composite explosion-proof agent is a mixture of organic fiber and metallic Al powder in a mass ratio of 1-2: 1-3; the organic fiber is one of polyester fiber, acrylic fiber, polyamide fiber or polypropylene fiber.
8. The iron runner castable material containing two carbon sources according to claim 1The method is characterized in that the antioxidant is metal Si powder and B with the mass ratio of 1-2:1-34C, mixtures thereof.
9. The iron runner castable material containing two carbon sources as claimed in claim 1, wherein the dispersant is sodium tripolyphosphate.
10. A method for preparing a two carbon source containing iron runner castable according to any one of claims 1-9, comprising the steps of:
weighing the raw materials according to a certain proportion, adding the raw materials into a stirrer, stirring for 1-2min in a dry mixing way, then adding water accounting for 4.2-4.5% of the total mass of the weighed raw materials, stirring for 3-5min, putting the mixture into a mould after uniformly stirring, and sequentially vibrating, maintaining and baking to obtain the iron runner castable containing two carbon sources.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113620695A (en) * | 2021-07-19 | 2021-11-09 | 北京利尔高温材料股份有限公司 | High-temperature-resistant iron runner castable and preparation method thereof |
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| CN111072377A (en) * | 2020-01-06 | 2020-04-28 | 郑州市瑞沃耐火材料有限公司 | Carbon composite blast furnace iron runner castable |
| WO2020083408A1 (en) * | 2018-10-26 | 2020-04-30 | 通达耐火技术股份有限公司 | Preparation method for titanium composite anti-erosion wear-resistant refractory castable |
| CN111574206A (en) * | 2020-05-12 | 2020-08-25 | 唐山市国亮特殊耐火材料有限公司 | Anti-corrosion iron runner castable for large blast furnace |
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2021
- 2021-02-25 CN CN202110210836.4A patent/CN112723869A/en active Pending
Patent Citations (4)
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| WO2020083408A1 (en) * | 2018-10-26 | 2020-04-30 | 通达耐火技术股份有限公司 | Preparation method for titanium composite anti-erosion wear-resistant refractory castable |
| CN109627026A (en) * | 2019-01-31 | 2019-04-16 | 河南竹林庆州耐火材料有限公司 | A kind of regeneration silicon carbide Al2O3- SiC-C iron runner castable and preparation method thereof |
| CN111072377A (en) * | 2020-01-06 | 2020-04-28 | 郑州市瑞沃耐火材料有限公司 | Carbon composite blast furnace iron runner castable |
| CN111574206A (en) * | 2020-05-12 | 2020-08-25 | 唐山市国亮特殊耐火材料有限公司 | Anti-corrosion iron runner castable for large blast furnace |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113620695A (en) * | 2021-07-19 | 2021-11-09 | 北京利尔高温材料股份有限公司 | High-temperature-resistant iron runner castable and preparation method thereof |
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Application publication date: 20210430 |