CN117645466B - Magnesium carbonaceous castable and preparation method thereof - Google Patents

Magnesium carbonaceous castable and preparation method thereof Download PDF

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CN117645466B
CN117645466B CN202410121489.1A CN202410121489A CN117645466B CN 117645466 B CN117645466 B CN 117645466B CN 202410121489 A CN202410121489 A CN 202410121489A CN 117645466 B CN117645466 B CN 117645466B
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parts
carbon
castable
magnesia
butoxycarboxylic
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CN117645466A (en
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马伟平
苗正
常春新
盛高霞
马静
张凯歌
赵鹏
�田�浩
张琳
郝立可
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Hebei Guoliang New Material Co ltd
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Abstract

The invention relates to the technical field of refractory materials, and provides a magnesia carbon castable and a preparation method thereof. The magnesium carbonaceous castable comprises the following components in parts by mass: 70-90 parts of magnesia, 6-12 parts of butoxycarboxylic acid modified carbon, 3-8 parts of silicon carbide, 1-5 parts of alumina micropowder, 3-5 parts of binding agent and 0.1-1 part of water reducer. By the technical scheme, the problems of poor compactness and low strength of the finished product of the magnesium-carbon castable in the prior art are solved.

Description

Magnesium carbonaceous castable and preparation method thereof
Technical Field
The invention relates to the technical field of refractory materials, in particular to a magnesia carbon castable and a preparation method thereof.
Background
The refractory castable is a pug which is formed by mixing refractory aggregate, binding agent and additive, and then adding water to blend into the pug which can be constructed by a casting method. Compared with other unshaped refractory materials, the refractory castable has certain setting and hardening time after construction, so that the castable can be demolded after being subjected to maintenance for a certain time after casting molding, and then can be put into baking after natural maintenance. The refractory castable is an unshaped refractory material which is most widely produced and used at present, and is mainly used for constructing various integral structures such as heating furnace linings, and the like, wherein the magnesia carbon castable is mainly used for smelting furnaces eroded by alkaline slag.
At present, carbon is mainly introduced into the magnesium carbonaceous castable by adding carbon-containing substances such as graphite and carbon black, but the wettability of the carbon and water is poor, so that the water addition amount in the casting process is increased, and the final finished product has poor compactness and low strength.
Disclosure of Invention
The invention provides a magnesia carbon castable and a preparation method thereof, which solve the problems of poor compactness and low strength of finished magnesia carbon castable products in the related technology.
The technical scheme of the invention is as follows:
the magnesium carbonaceous castable comprises the following components in parts by mass: 70-90 parts of magnesia, 6-12 parts of butoxycarboxylic acid modified carbon, 3-8 parts of silicon carbide, 1-5 parts of alumina micropowder, 3-5 parts of binding agent and 0.1-1 part of water reducer.
As a further technical scheme, the raw materials of the butoxycarboxylic acid modified carbon comprise carbon and butoxycarboxylic acid in a mass ratio of 1:0.3-0.5.
As a further technical scheme, the carbon comprises one or two of graphite and carbon black.
As a further technical scheme, the butoxycarboxylic acid comprises one or two of (2-n-butoxyethoxy) acetic acid and 4-butoxybenzoic acid.
As a further technical scheme, the butoxycarboxylic acid comprises 4-butoxybenzoic acid and (2-n-butoxyethoxy) acetic acid in a mass ratio of 1:4-3:2.
As a further technical scheme, the butoxycarboxylic acid comprises 4-butoxybenzoic acid and (2-n-butoxyethoxy) acetic acid in a mass ratio of 2:3.
As a further technical scheme, the preparation method of the butoxycarboxylic acid modified carbon comprises the following steps: mixing carbon, butoxycarboxylic acid and solvent, and reacting to obtain butoxycarboxylic acid modified carbon.
As a further technical scheme, the solvent is dimethyl sulfoxide.
As a further technical scheme, the reaction temperature is 100-120 ℃, and the reaction time is 1-3 h.
As a further technical scheme, the bonding agent comprises one or two of silica fume and silica sol.
As a further technical scheme, the water reducer comprises one or two of sodium tripolyphosphate and sodium hexametaphosphate.
The invention also provides a preparation method of the magnesia carbon castable, which comprises the following steps: and uniformly mixing the components in parts by mass to obtain the magnesia carbon castable.
The working principle and the beneficial effects of the invention are as follows:
1. the invention adopts butoxycarboxylic acid to modify carbon, and utilizes the reaction of the butoxy in the butoxycarboxylic acid and the hydroxyl on the carbon surface to endow the carbon surface with oxygen-containing functional groups: ether bond and carboxyl, oxygen-containing functional group is easy to form hydrogen bond with water molecule and hydrophilic, thus improving the wettability of carbon and water, and achieving the technical effect of improving the compactness and compressive strength of the finished product of the magnesium carbonaceous castable.
2. According to the invention, the butoxycarboxylic acid is limited to 4-butoxybenzoic acid and (2-n-butoxyethoxy) acetic acid modified carbon with a mass ratio of 1:4-3:2, so that the compactness and the compressive strength of a finished product of the magnesia carbon castable are further improved. The 4-butoxybenzoic acid contains a rigid benzene ring structure, but the benzene ring has larger steric hindrance and can influence the modification effect; while (2-n-butoxyethoxy) acetic acid has good modification effect, the molecular structure of the (2-n-butoxyethoxy) acetic acid is flexible relative to that of 4-butoxybenzoic acid, so that the compactness and the compressive strength of a magnesium carbonaceous castable finished product obtained by modifying carbon with the 4-butoxybenzoic acid and the (2-n-butoxyethoxy) acetic acid are better than those of the carbon modified with the 4-butoxybenzoic acid or the (2-n-butoxyethoxy) acetic acid alone.
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:
the magnesia is sintered magnesia which consists of particles with the particle size of less than or equal to 5mm and 3mm and particles with the particle size of less than or equal to 3mm and 1mm and particles with the particle size of less than or equal to 1mm and 0 mm and less than or equal to 1mm in the mass ratio of 1:1:2;
the graphite is 200-mesh flake graphite and has a carbon content of 75wt%;
the granularity of the silicon carbide is 200 meshes, and the SiC content is more than or equal to 98wt%;
alumina powder of 2 μm alumina powder, al 2 O 3 The content is more than or equal to 99.8 weight percent, fe 2 O 3 The content is less than or equal to 0.03 weight percent, siO 2 The content is less than or equal to 0.10wt%;
the silica sol is alkaline silica sol with the solid content of 30 wt%;
the micro silicon powder is 200 meshes, and the silicon content is more than or equal to 95wt%;
the carbon black is metallurgical carbon black with the particle diameter of 20nm, and the purity is more than or equal to 99.9wt%;
the sodium tripolyphosphate is industrial grade sodium tripolyphosphate, the content is more than or equal to 95wt%, and the granularity is 200 meshes.
Example 1
S1, dissolving 1.5g of (2-n-butoxyethoxy) acetic acid in 300mL of DMSO, adding 15g of graphite, heating to 110 ℃ for reaction for 2 hours, filtering, washing with water, and drying to obtain butoxycarboxylic acid modified carbon;
and S2, uniformly mixing 80 parts of magnesia, 9 parts of butoxycarboxylic acid modified carbon, 5 parts of silicon carbide, 3 parts of alumina micropowder, 4.5 parts of silica sol and 0.5 part of sodium tripolyphosphate to obtain the magnesia carbon castable.
Example 2
S1, dissolving 1.5g of (2-n-butoxyethoxy) acetic acid in 300mL of DMSO, adding 15g of graphite, heating to 100 ℃ for reaction for 3 hours, filtering, washing with water, and drying to obtain butoxycarboxylic acid modified carbon;
s2, uniformly mixing 70 parts of magnesia, 6 parts of butoxycarboxylic acid modified carbon, 3 parts of silicon carbide, 1 part of alumina micropowder, 1 part of silica fume, 2 parts of silica sol and 0.1 part of sodium hexametaphosphate to obtain the magnesia carbon castable.
Example 3
S1, dissolving 1.5g of (2-n-butoxyethoxy) acetic acid in 300mL of DMSO, adding 15g of carbon black, heating to 120 ℃ for reaction for 1h, filtering, washing with water, and drying to obtain butoxycarboxylic acid modified carbon;
s2, uniformly mixing 90 parts of magnesia, 12 parts of butoxycarboxylic acid modified carbon, 8 parts of silicon carbide, 5 parts of alumina micropowder, 1.5 parts of silica fume, 3.5 parts of silica sol, 0.5 part of sodium tripolyphosphate and 0.5 part of sodium hexametaphosphate to obtain the magnesia carbon castable.
Example 4
S1, dissolving 4.5g of (2-n-butoxyethoxy) acetic acid in 300mL of DMSO, adding 15g of graphite, heating to 110 ℃ for reaction for 2 hours, filtering, washing with water, and drying to obtain butoxycarboxylic acid modified carbon;
and S2, uniformly mixing 80 parts of magnesia, 9 parts of butoxycarboxylic acid modified carbon, 5 parts of silicon carbide, 3 parts of alumina micropowder, 4.5 parts of silica sol and 0.5 part of sodium tripolyphosphate to obtain the magnesia carbon castable.
Example 5
S1, dissolving 7.5g of (2-n-butoxyethoxy) acetic acid in 300mL of DMSO, adding 15g of graphite, heating to 110 ℃ for reaction for 2 hours, filtering, washing with water, and drying to obtain butoxycarboxylic acid modified carbon;
and S2, uniformly mixing 80 parts of magnesia, 9 parts of butoxycarboxylic acid modified carbon, 5 parts of silicon carbide, 3 parts of alumina micropowder, 4.5 parts of silica sol and 0.5 part of sodium tripolyphosphate to obtain the magnesia carbon castable.
Example 6
S1, dissolving 10g of (2-n-butoxyethoxy) acetic acid in 300mL of DMSO, adding 15g of graphite, heating to 110 ℃ for reaction for 2h, filtering, washing with water, and drying to obtain butoxycarboxylic acid modified carbon;
and S2, uniformly mixing 80 parts of magnesia, 9 parts of butoxycarboxylic acid modified carbon, 5 parts of silicon carbide, 3 parts of alumina micropowder, 4.5 parts of silica sol and 0.5 part of sodium tripolyphosphate to obtain the magnesia carbon castable.
Example 7
S1, dissolving 7.5g of 4-butoxybenzoic acid in 300mL of DMSO, adding 15g of graphite, heating to 110 ℃ for reaction for 2 hours, filtering, washing with water, and drying to obtain butoxycarboxylic acid modified carbon;
and S2, uniformly mixing 80 parts of magnesia, 9 parts of butoxycarboxylic acid modified carbon, 5 parts of silicon carbide, 3 parts of alumina micropowder, 4.5 parts of silica sol and 0.5 part of sodium tripolyphosphate to obtain the magnesia carbon castable.
Example 8
S1, dissolving 1.5g of 4-butoxybenzoic acid, (2-n-butoxyethoxy) acetic acid and 6g of (2-n-butoxyethoxy) acetic acid in 300mL of DMSO, adding 15g of graphite, heating to 110 ℃ for reaction for 2 hours, filtering, washing with water, and drying to obtain butoxycarboxylic acid modified carbon;
and S2, uniformly mixing 80 parts of magnesia, 9 parts of butoxycarboxylic acid modified carbon, 5 parts of silicon carbide, 3 parts of alumina micropowder, 4.5 parts of silica sol and 0.5 part of sodium tripolyphosphate to obtain the magnesia carbon castable.
Example 9
S1, dissolving 3g of 4-butoxybenzoic acid, (2-n-butoxyethoxy) acetic acid and 4.5g of (2-n-butoxyethoxy) acetic acid in 300mL of DMSO, adding 15g of graphite, heating to 110 ℃ for reaction for 2h, filtering, washing with water, and drying to obtain butoxycarboxylic acid modified carbon;
and S2, uniformly mixing 80 parts of magnesia, 9 parts of butoxycarboxylic acid modified carbon, 5 parts of silicon carbide, 3 parts of alumina micropowder, 4.5 parts of silica sol and 0.5 part of sodium tripolyphosphate to obtain the magnesia carbon castable.
Example 10
S1, dissolving 4.5g of 4-butoxybenzoic acid and 3g of (2-n-butoxyethoxy) acetic acid in 300mL of DMSO, adding 15g of graphite, heating to 110 ℃ for reaction for 2 hours, filtering, washing with water, and drying to obtain butoxycarboxylic acid modified carbon;
and S2, uniformly mixing 80 parts of magnesia, 9 parts of butoxycarboxylic acid modified carbon, 5 parts of silicon carbide, 3 parts of alumina micropowder, 4.5 parts of silica sol and 0.5 part of sodium tripolyphosphate to obtain the magnesia carbon castable.
Comparative example 1
And uniformly mixing 80 parts of magnesia, 9 parts of graphite, 5 parts of silicon carbide, 3 parts of alumina micropowder, 4.5 parts of silica sol and 0.5 part of sodium tripolyphosphate to obtain the magnesia carbon castable.
The magnesia carbon castable obtained in examples 1 to 10 and comparative example 1 was added with water accounting for 4% of the total mass of the castable, stirred uniformly, poured into a mold, subjected to vibration molding, cured and baked at 110 ℃ for 24 hours, tested for bulk density by referring to the hydrostatic weighing method of YB/T5200-93, the method of GB/T5072-2008, the method of refractory normal temperature compressive strength test, and the test results recorded in Table 1.
TABLE 1 bulk Density and compressive Strength
As can be seen from Table 1, the volume density of the finished product obtained by the magnesia carbon castable provided by the invention is 3.04g/cm 3 The compressive strength is above 59.0MPa, and the high compactness and compressive strength are achieved.
Examples 1 to 10 compared with comparative example 1, the butoxycarboxylic acid was used to modify the carbon in examples 1 to 10, and the carbon was not modified in comparative example 1, and the bulk density and compressive strength of the finished magnesia-carbon castable obtained in examples 1 to 10 were higher than those of comparative example 1, indicating that the wettability of the carbon with water can be improved by modifying the carbon with butoxycarboxylic acid, thereby improving the compactness and compressive strength of the finished magnesia-carbon castable.
Compared with examples 1-7, examples 8-10 use 4-butoxybenzoic acid and (2-n-butoxyethoxy) acetic acid modified carbon in a mass ratio of 1:4-3:2 in examples 8-10, use (2-n-butoxyethoxy) acetic acid modified carbon in examples 1-6, use 4-butoxybenzoic acid modified carbon in example 7, and the bulk density and compressive strength of the finished product of the magnesia carbon castable obtained in examples 8-10 are higher than those of examples 1-7, which means that the compactness and compressive strength of the finished product of the magnesia carbon castable can be further improved by using 4-butoxybenzoic acid and (2-n-butoxyethoxy) acetic acid modified carbon in a mass ratio of 1:4-3:2.
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 (4)

1. The magnesium carbonaceous castable is characterized by comprising the following components in parts by mass: 70-90 parts of magnesia, 6-12 parts of butoxycarboxylic acid modified carbon, 3-8 parts of silicon carbide, 1-5 parts of alumina micropowder, 3-5 parts of binding agent and 0.1-1 part of water reducer;
the raw materials of the butoxycarboxylic acid modified carbon comprise carbon and butoxycarboxylic acid in a mass ratio of 1:0.3-0.5;
the carbon comprises one or two of graphite and carbon black;
the butoxycarboxylic acid comprises 4-butoxybenzoic acid and (2-n-butoxyethoxy) acetic acid in a mass ratio of 1:4-3:2;
the preparation method of the butoxycarboxylic acid modified carbon comprises the following steps: mixing carbon, butoxycarboxylic acid and a solvent, and reacting to obtain butoxycarboxylic acid modified carbon;
the reaction temperature is 100-120 ℃, and the reaction time is 1-3 h.
2. The magnesia carbon castable according to claim 1, wherein the binder comprises one or both of silica fume and silica sol.
3. The magnesium carbonaceous casting material according to claim 1, wherein the water reducing agent comprises one or both of sodium tripolyphosphate and sodium hexametaphosphate.
4. A method for preparing a magnesia carbon castable according to any one of claims 1 to 3, comprising the steps of: and uniformly mixing the components in parts by mass to obtain the magnesia carbon castable.
CN202410121489.1A 2024-01-30 2024-01-30 Magnesium carbonaceous castable and preparation method thereof Active CN117645466B (en)

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62275011A (en) * 1986-02-20 1987-11-30 Sugiro Otani Impermeable carbon material and its production
JPH11157943A (en) * 1997-11-19 1999-06-15 Tokai Konetsu Kogyo Co Ltd Siliceous carbide powder slurry for slip casting and its preparation
JP2000169235A (en) * 1998-12-01 2000-06-20 Tokai Konetsu Kogyo Co Ltd Production of sintered reaction bonded silicon carbide sintered product
CN103204689A (en) * 2013-04-25 2013-07-17 鞍山市星火特种耐火材料有限公司 Carbon-containing gunning mix for hot-state gunning mix of converter as well as preparation method and using method of carbon-containing gunning mix
CN105948786A (en) * 2016-05-06 2016-09-21 陈昌 Honeycomb type wear resistant composite material and preparation method thereof
CN106634198A (en) * 2016-10-08 2017-05-10 常州创索新材料科技有限公司 A method of preparing carbon pen core printing ink
CN115368146A (en) * 2022-10-24 2022-11-22 山东红点新材料有限公司 Non-asphalt-based adhesive for producing carbon product and preparation method thereof
CN115490506A (en) * 2022-10-22 2022-12-20 佛山市三水宏源陶瓷企业有限公司 Rock plate with formaldehyde degradation function and preparation method thereof

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62275011A (en) * 1986-02-20 1987-11-30 Sugiro Otani Impermeable carbon material and its production
JPH11157943A (en) * 1997-11-19 1999-06-15 Tokai Konetsu Kogyo Co Ltd Siliceous carbide powder slurry for slip casting and its preparation
JP2000169235A (en) * 1998-12-01 2000-06-20 Tokai Konetsu Kogyo Co Ltd Production of sintered reaction bonded silicon carbide sintered product
CN103204689A (en) * 2013-04-25 2013-07-17 鞍山市星火特种耐火材料有限公司 Carbon-containing gunning mix for hot-state gunning mix of converter as well as preparation method and using method of carbon-containing gunning mix
CN105948786A (en) * 2016-05-06 2016-09-21 陈昌 Honeycomb type wear resistant composite material and preparation method thereof
CN106634198A (en) * 2016-10-08 2017-05-10 常州创索新材料科技有限公司 A method of preparing carbon pen core printing ink
CN115490506A (en) * 2022-10-22 2022-12-20 佛山市三水宏源陶瓷企业有限公司 Rock plate with formaldehyde degradation function and preparation method thereof
CN115368146A (en) * 2022-10-24 2022-11-22 山东红点新材料有限公司 Non-asphalt-based adhesive for producing carbon product and preparation method thereof

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