CN111378364B - Coating paint for magnesia carbon brick - Google Patents
Coating paint for magnesia carbon brick Download PDFInfo
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- CN111378364B CN111378364B CN202010135970.8A CN202010135970A CN111378364B CN 111378364 B CN111378364 B CN 111378364B CN 202010135970 A CN202010135970 A CN 202010135970A CN 111378364 B CN111378364 B CN 111378364B
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- China
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- magnesia carbon
- coating paint
- carbon brick
- coating
- magnesia
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D197/00—Coating compositions based on lignin-containing materials
- C09D197/02—Lignocellulosic material, e.g. wood, straw or bagasse
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5001—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with carbon or carbonisable materials
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
- C04B41/81—Coating or impregnation
- C04B41/85—Coating or impregnation with inorganic materials
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Structural Engineering (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
The invention discloses a coating paint for magnesia carbon bricks, which belongs to the technical field of materials. The coating paint can prevent the magnesia carbon brick from being oxidized at high temperature, can absorb the expansion of the magnesia carbon brick when a converter is opened, enhances the strength of the magnesia carbon brick and prolongs the service life of the magnesia carbon brick; the coating paint of the invention also has the advantages of low cost, simple manufacturing method and convenient use.
Description
Technical Field
The invention relates to a coating, in particular to a coating for a magnesia carbon brick, belonging to the technical field of materials.
Background
China is a large country for steel production, and a converter is one of the most key main devices of steel-making enterprises in China. The modern steel-making converter generally adopts magnesia carbon bricks as a furnace lining working layer. The magnesia carbon brick is a refractory material which is prepared by pressing magnesia and carbon materials serving as main raw materials and adding carbon binders such as phenolic resin, asphalt and the like. The working environment temperature of the converter can reach 1650-1700 ℃ after the converter is started, the magnesia carbon bricks can be expanded once without retraction, the expansion can possibly cause the adjacent magnesia carbon bricks to be extruded to cause the magnesia carbon bricks to be crushed, meanwhile, under the high-temperature condition, carbon binders in the magnesia carbon bricks and the like can react with oxygen and carbon dioxide in the converter atmosphere to generate gases such as carbon dioxide and carbon monoxide to be volatilized, loose and pulverized decarburized layers with certain thickness can be formed, the decarburized layers are stripped due to mechanical vibration or flushed along with molten steel, the volume of the magnesia carbon bricks is gradually reduced, the strength of the magnesia carbon bricks is gradually reduced, and the service life of the magnesia carbon bricks is seriously shortened.
Patent document CN206635360U discloses a converter capable of preventing magnesia carbon bricks from swelling and peeling, wherein yellow board paper is placed at the intervals between several magnesia carbon bricks to prevent the magnesia carbon bricks from swelling and peeling, and yellow board paper is also placed between the magnesia carbon bricks, however, the main materials of the yellow board paper are rice straw and wheat straw, and the material can be carbonized under the high temperature environment of the converter working, and the volume of the material can only be reduced by 10-20%, so that the gaps between magnesia carbon bricks and the gaps between magnesia carbon bricks in the same layer can not be left completely, the swelling of the magnesia carbon bricks can not be effectively absorbed, and the magnesia carbon bricks can still be crushed.
Patent document CN105000897B discloses a protective material for ladle magnesia carbon brick and an application method thereof, wherein the protective material for ladle magnesia carbon brick is prepared from nearly 12 materials such as carbon black, lithium carbonate, boric acid, titanium dioxide, aluminum oxide and the like, and can relieve the loosening and pulverization of magnesia carbon brick in high-temperature working environment to a certain extent, but can not completely avoid the decarburization and peeling of magnesia carbon brick; in addition, the protective material has various raw materials, the particle size of the carbon black is required to be less than 20 mu m, the processing process is complex, and the production cost is high.
Patent document CN101928480A discloses a method for preparing an aluminum-free anti-oxidation coating for magnesia carbon brick, which can prevent the oxidation of magnesia carbon brick to a certain extent, but the coating forms a smooth enamel ceramic layer on the surface of the magnesia carbon brick, so that the surface of the magnesia carbon brick is smooth, the difficulty of laying in a converter is increased, and the magnesia carbon brick is easy to draw and rotate in the using process after successful laying.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a coating for a magnesia carbon brick, which prolongs the service life of the magnesia carbon brick and solves the problem that the magnesia carbon brick is crushed due to the expansion of the magnesia carbon brick.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the coating paint for the magnesia carbon brick comprises the components of carbon black, paper fiber, polyethylene glycol, pentaerythritol, triethylamine, maleic anhydride and water.
The technical scheme of the invention is further improved as follows: the coating comprises, by weight, 6-15% of carbon black, 5-7% of paper fiber, 1-3% of polyethylene glycol, 1-3% of pentaerythritol, 3-7% of triethylamine, 2-4% of maleic anhydride and the balance of water.
The technical scheme of the invention is further improved as follows: the coating paint comprises 7% of carbon black, 6% of paper fiber, 2% of polyethylene glycol, 2% of pentaerythritol, 5% of triethylamine, 3% of maleic anhydride and the balance of water in percentage by weight.
The technical scheme of the invention is further improved as follows: the particle size of the carbon black is 35-50 mu m.
The technical scheme of the invention is further improved as follows: the fiber length of the paper fiber is 0.5-2 mm.
The technical scheme of the invention is further improved as follows: also comprises 1-3% of isobutanol and 1-5% of phthalic acid by weight percent.
The technical scheme of the invention is further improved as follows: the preparation method of the coating paint comprises the steps of adding the components into a heating container according to a preset proportion, heating and uniformly stirring at a preset temperature, and finally cooling to room temperature.
The technical scheme of the invention is further improved as follows: the preset temperature is 150-180 ℃, the heating time is 3-5 hours, and the stirring speed is 50-100 revolutions per minute.
The technical scheme of the invention is further improved as follows: the application method of the coating paint comprises the steps of uniformly spraying or brushing the prepared coating paint on the surface of the magnesia carbon brick, naturally airing, heating for 2 hours at 150 ℃, and finally cooling to room temperature.
The technical scheme of the invention is further improved as follows: the thickness of the coating on the surface of the magnesia carbon brick is 0.2-0.25 mm.
Due to the adoption of the technical scheme, the invention has the technical progress that:
the coating paint can prevent the magnesia carbon brick from being oxidized at high temperature, can absorb the expansion of the magnesia carbon brick when a converter is opened, enhances the strength of the magnesia carbon brick and prolongs the service life of the magnesia carbon brick. The coating paint of the invention forms a relatively rough protective layer on the surface of the magnesia carbon brick, can play a role of skid resistance between adjacent magnesia carbon bricks, and the magnesia carbon brick can be more easily placed in a converter to be used as a working lining.
The coating paint of the invention also has the advantages of low cost, simple manufacturing method and convenient use. The components of the coating are common substances in the field of the existing materials, and the coating can be prepared by mixing the components and heating and uniformly mixing the components at a certain temperature, and can be sprayed or brushed on the surface of a magnesia carbon brick according to the existing process when in use.
The carbon black in the invention has the preferable particle size of 35-50 μm, the raw material processing difficulty is low, and the carbon binding agent in the coal brick can be better protected from being oxidized and consumed by the oxidation of the carbon black after the paper fiber, the polyethylene glycol, the pentaerythritol, the triethylamine and the maleic anhydride are added; the raw materials are matched with each other, so that the raw materials can be uniformly dispersed and mixed, the converter can be ensured to be completely consumed when the converter is opened, enough space is reserved for the expansion of the magnesia carbon brick, the carbon in the magnesia carbon brick can be ensured not to be oxidized, the integrity of the magnesia carbon brick is protected, and the lightness of the magnesia carbon brick is increased; the raw materials in the coating paint are matched with each other, so that the magnesia carbon brick can be well protected in each temperature section.
Detailed Description
The present invention will be described in further detail with reference to the following examples:
the coating comprises 6-15 wt% of carbon black, 5-7 wt% of paper fiber, 1-3 wt% of polyethylene glycol, 1-3 wt% of pentaerythritol, 3-7 wt% of triethylamine, 2-4 wt% of maleic anhydride and the balance of water.
Preferably, the coating paint comprises 7% of carbon black, 6% of paper fiber, 2% of polyethylene glycol, 2% of pentaerythritol, 5% of triethylamine, 3% of maleic anhydride and the balance of water in percentage by weight.
Preferably, the particle size of the carbon black is 35-50 μm, and the fiber length of the paper fiber is 0.5-2 mm.
Preferably, the additive also comprises 1-3% by weight of isobutanol and 1-5% by weight of phthalic acid.
The preparation method of the coating comprises the steps of adding the components into a heating container according to a preset proportion, heating for 3-5 hours at 150-180 ℃, uniformly stirring at a stirring speed of 50-100 r/min during heating, and finally cooling to room temperature.
The application method of the coating paint comprises the steps of uniformly spraying or brushing the prepared coating paint on the surface of the magnesia carbon brick, naturally airing, heating for 2 hours at 150 ℃, and finally cooling to room temperature. Preferably, the thickness of the coating on the surface of the magnesia carbon brick is 0.2-0.25 mm.
Example 1
The coating paint for the magnesia carbon brick comprises the components of, by weight, 6% of carbon black, 7% of paper fiber, 1% of polyethylene glycol, 3% of pentaerythritol, 3% of triethylamine, 4% of maleic anhydride and the balance of water.
The particle size of the carbon black is 35-50 mu m, and the fiber length of the paper fiber is 0.5-2 mm;
the preparation method of the coating paint comprises the steps of adding the components into a heating container according to a preset proportion, heating for 5 hours at 150 ℃, uniformly stirring at a stirring speed of 50 revolutions per minute during heating, and finally cooling to room temperature.
The application method of the coating paint comprises the steps of uniformly spraying or brushing the prepared coating paint on the surface of the magnesia carbon brick, naturally drying, heating for 2 hours at 150 ℃, and cooling to room temperature, wherein the thickness of the coating paint on the surface of the magnesia carbon brick is 0.2-0.25 mm.
The types and the contents of the components of the coating materials in the examples 2 to 6 and the comparative examples 1 to 4 and the preparation method are basically the same as those in the example 1, and the specific values are shown in the following table, wherein the content values of the components are weight percentages, the content of water is not shown in the table, and the sum of the content of the water and the weight percentage values of other components is 100; "- - -" means the content is zero, and the temperature, the time and the rotating speed are the heating temperature, the heating time and the stirring rotating speed in the preparation process of the coating, and the diameter unit of the carbon black is mum.
TABLE 1
The coating materials prepared in examples 1 to 6 and comparative examples 1 to 4 were sprayed or brushed on the surface of the magnesia carbon brick, the prepared magnesia carbon brick was laid in a converter of the same specification, the temperature of the converter was increased to 1650 ℃, the performance quality of the magnesia carbon brick was checked, and the service life of the magnesia carbon brick was tested, specifically as shown in table 2, wherein one of the performance indexes of the magnesia carbon brick was whether the surface coating of the magnesia carbon brick was smooth or rough, the second index was whether the decarburized layer was generated on the surface layer of the magnesia carbon brick under high temperature conditions (whether the magnesia carbon brick was peeled off by vibration), the third index was the number of uses of the magnesia carbon brick (how much molten steel was continuously produced, the number of uses of the table 2 was the number of uses more than the conventional process), the fourth index was the degree of drops of the magnesia carbon brick coating (whether the coating was melted or not, expressed by the ratio of the thickness of the surface coating of the magnesia carbon brick to the initial thickness), the fifth index is whether the magnesia carbon brick is crushed under high temperature conditions).
TABLE 2
Claims (7)
1. A coating paint for magnesia carbon bricks is characterized in that: the components of the coating paint comprise carbon black, paper fiber, polyethylene glycol, pentaerythritol, triethylamine, maleic anhydride, isobutanol, phthalic acid and water;
the carbon black-based paper fiber-containing paper comprises, by weight, 6-15% of carbon black, 5-7% of paper fiber, 1-3% of polyethylene glycol, 1-3% of pentaerythritol, 3-7% of triethylamine, 2-4% of maleic anhydride, 1-3% of isobutanol, 1-5% of phthalic acid and the balance of water.
2. The coating paint for magnesia carbon bricks according to claim 1, wherein: the particle size of the carbon black is 35-50 mu m.
3. The coating paint for magnesia carbon bricks according to claim 1, wherein: the fiber length of the paper fiber is 0.5-2 mm.
4. A coating paint for magnesia carbon brick according to any one of claims 1 to 3, characterized in that: the preparation method of the coating paint comprises the steps of adding the components into a heating container according to a preset proportion, heating and uniformly stirring at a preset temperature, and finally cooling to room temperature.
5. The coating paint for magnesia carbon bricks according to claim 4, wherein: the preset temperature is 150-180 ℃, the heating time is 3-5 hours, and the stirring speed is 50-100 revolutions per minute.
6. The coating paint for magnesia carbon bricks according to claim 5, wherein: the application method of the coating paint comprises the steps of uniformly spraying or brushing the prepared coating paint on the surface of the magnesia carbon brick, naturally airing, heating for 2 hours at 150 ℃, and finally cooling to room temperature.
7. The coating paint for magnesia carbon bricks according to claim 6, wherein: the thickness of the coating on the surface of the magnesia carbon brick is 0.2-0.25 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010135970.8A CN111378364B (en) | 2020-03-02 | 2020-03-02 | Coating paint for magnesia carbon brick |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010135970.8A CN111378364B (en) | 2020-03-02 | 2020-03-02 | Coating paint for magnesia carbon brick |
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| Publication Number | Publication Date |
|---|---|
| CN111378364A CN111378364A (en) | 2020-07-07 |
| CN111378364B true CN111378364B (en) | 2021-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010135970.8A Active CN111378364B (en) | 2020-03-02 | 2020-03-02 | Coating paint for magnesia carbon brick |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111960832B (en) * | 2020-08-24 | 2022-10-11 | 青岛弘汉耐火材料有限公司 | Bare body sintering coating for aluminum-carbon product and bare body sintering method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1034934A (en) * | 1988-02-13 | 1989-08-23 | 曾洪厚;王树坤 | The preparation method of liquid polyester type resin |
| JP2006233135A (en) * | 2005-02-28 | 2006-09-07 | Kurosaki Harima Corp | Aqueous resin coating agent and refractory brick obtained by using the same |
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2020
- 2020-03-02 CN CN202010135970.8A patent/CN111378364B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1034934A (en) * | 1988-02-13 | 1989-08-23 | 曾洪厚;王树坤 | The preparation method of liquid polyester type resin |
| JP2006233135A (en) * | 2005-02-28 | 2006-09-07 | Kurosaki Harima Corp | Aqueous resin coating agent and refractory brick obtained by using the same |
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| CN111378364A (en) | 2020-07-07 |
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Address after: 066000 jiangjiawa village, Duzhuang Town, Haigang District, Qinhuangdao City, Hebei Province Patentee after: Qinhuangdao Shounai New Materials Co.,Ltd. Address before: 066000 jiangjiawa village, Duzhuang Town, Haigang District, Qinhuangdao City, Hebei Province Patentee before: QINHUANGDAO SHOUGANG HEIQI REFRACTORY MATERIAL Co.,Ltd. |
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