CN109020623A - A kind of antioxidative graphite electrode of nano-graphene enhancing - Google Patents
A kind of antioxidative graphite electrode of nano-graphene enhancing Download PDFInfo
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- CN109020623A CN109020623A CN201811044313.1A CN201811044313A CN109020623A CN 109020623 A CN109020623 A CN 109020623A CN 201811044313 A CN201811044313 A CN 201811044313A CN 109020623 A CN109020623 A CN 109020623A
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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
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
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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
- C04B41/45—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
- C04B41/5053—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 non-oxide ceramics
- C04B41/5057—Carbides
- C04B41/5059—Silicon carbide
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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
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Abstract
The invention discloses a kind of nano-graphenes to enhance antioxidative graphite electrode, it is characterized in that, including graphite electrode matrix, it is enclosed with anti oxidation layer in matrix surface, the anti oxidation layer includes the following component of weight percent: graphene 2-6%, silicon carbide 5-10%, kaolin 40-50%, titanium dioxide 10-20%, calcium oxide 20-30%.Graphite electrode matrix surface of the present invention constitutes surface oxidation-resistant layer using kaoline loaded graphene, silicon carbide, titanium dioxide, calcium oxide etc., so that graphite electrode is under high temperature environment, air is eased for the oxidation deactivation of graphite electrode, the oxidation weight loss amount of graphite electrode is reduced, and stability improves.
Description
Technical field
The present invention relates to a kind of graphite electrode, in particular to a kind of nano-graphene enhances antioxidative graphite electrode,
Belong to technical field of novel materials.
Background technique
Graphite electrode refers to that coal tar pitch is adhesive using petroleum coke, pitch coke as aggregate, by raw material calcining, broken mill
Powder, ingredient, kneading, molding, roasting, dipping, graphitization and machining and a kind of manufactured high temperature resistant graphite conductive material,
Referred to as artificial graphite electrode (abbreviation graphite electrode), to be different from the natural electrode for using natural graphite to prepare as raw material.
Graphite electrode is as various alloy smelting iron and steels are smelted, disadvantage is that high-temperature oxidation resistance is poor, in smelting
Under the hot environment for refining smelting furnace, graphite electrode is very easy to oxidation.In steelmaking process, temperature of smelting furnace is very high, in conjunction with smelting furnace
Interior oxygen blast, oxygen concentration is higher in air, so that the problem of oxidation of graphite electrode is more serious.
Graphite is a kind of allotrope of elemental carbon, and the periphery of each carbon atom links the other three carbon atom (row
Column mode is in cellular multiple hexagons) with Covalent bonding together, constitute covalent molecule.Monomolecular is obtained after graphite removing
The ingredient of structure is graphene, and graphene is currently most thin, most hard nano material in the world, it be almost it is fully transparent,
2.3% light is only absorbed, while being also the smallest material of resistivity in the world.
Summary of the invention
It is easy to oxidize in graphite electrode use process in the prior art it is an object of the invention to overcome, cause structure to be lost
Surely, there are problems that fracture falls into molten alloy liquid, provide a kind of nano-graphene enhancing antioxidative graphite electrode.
In order to achieve the above-mentioned object of the invention, the present invention provides following technical schemes:
A kind of antioxidative graphite electrode of nano-graphene enhancing, including graphite electrode matrix, are wrapped up in matrix surface
There is anti oxidation layer, the anti oxidation layer includes the following component of weight percent: graphene 2-6%, silicon carbide 5-10%, kaolinite
Native 40-50%, titanium dioxide 10-20%, calcium oxide 20-30%.
Graphite electrode matrix surface of the present invention is using structures such as kaoline loaded graphene, silicon carbide, titanium dioxide, calcium oxide
At surface oxidation-resistant layer, so that graphite electrode is under high temperature environment, air is eased for the oxidation deactivation of graphite electrode, stone
The oxidation weight loss amount of electrode ink is reduced, and stability improves.
Further, the anti oxidation layer include weight percent following component: graphene 3-6%, silicon carbide 6-10%,
Kaolin 40-50%, titanium dioxide 10-15%, calcium oxide 20-30%.
Further, the anti oxidation layer include weight percent following component: graphene 3-6%, silicon carbide 7-10%,
Kaolin 45-50%, titanium dioxide 10-15%, calcium oxide 20-28%.
Further, the anti oxidation layer is with a thickness of 10-20 μm.Anti oxidation layer thickness has the function that sufficiently to completely cut off air,
Prevent air for the corrosion failure of graphite electrode matrix.
Preferably, described 10-15 μm of anti oxidation layer thickness.
It is a further object of the present invention to provide a kind of graphite electrode preparation methods of above-mentioned surface oxidation-resistant enhancing, preferably
The quality of anti oxidation layer is controlled, improves graphite electrode anit-oxidizing performance, plays optimal anti-oxidation efficacy humidification.
A method of preparing above-mentioned graphite electrode, comprising the following steps:
(1) graphene, silicon carbide, kaolin, titanium dioxide, calcium oxide, ball milling 12-48h, using ethyl alcohol as ball milling are taken
Medium, ratio of grinding media to material 3-5:1.
(2) after the completion of ball milling, feed liquid is poured out, with ethanol washing abrading-ball, feed liquid will be merged and be configured to solid content 10-25%'s
Slurry, is so coated on graphite electrode surface for this slurry, and 450-650 DEG C of drying obtains the graphite electrode of surface oxidation-resistant enhancing.
The present invention is by raw materials such as oxide layer graphene, silicon carbide, kaolin, titanium dioxide, calcium oxide in ethanol medium
Ball milling is carried out, so that material is as fine and smooth by milling as possible, last feed liquid is coated on the slurry that ethyl alcohol prepares ingredient low concentration
The surface of graphite electrode forms a very thin protective layer, is converted into the good anti oxidation layer of adhesion through drying, has good
Good air exclusion performance, plays best high-temperature oxidation resistance.
Further, step 1 prepare slurry before coating, through ultrasonic treatment 10-30min.
Further, step 2,550-650 DEG C of drying temperature.Preferably, 580-630 DEG C of drying temperature.It is preferred that drying process
Temperature reaches 580 DEG C or more, so that the moisture of absorbent lime is completely broken down release, reaches expected anti oxidation layer effect and makees
With.
Further, step 2, drying time 10-60min.Preferably, drying time 20-40min.
Compared with prior art, beneficial effects of the present invention:
1, graphite electrode matrix surface of the present invention enhances graphite electrode anit-oxidizing by the anti oxidation layer containing graphene
Can, graphite electrode oxidation weight loss is reduced, graphite electrode stability status is improved.
2, the anti oxidation layer of graphite electrode surface of the present invention is using conducts such as graphene, silicon carbide, titanium dioxide, calcium oxide
Barrier material, using kaolin as underlying carrier adhesive, control is realized multi-component mutually compound.A variety of antioxidant composition associations
The same sex is good, and comprehensive antioxygenic property is prominent.
3, the anti oxidation layer stable structure of graphite electrode surface of the present invention, not easily to fall off, storage transportation stability is good, graphite
Surface oxidation-resistant layer zero defect, anti oxidation layer property are more reliable and more stable in the application for electrode.
Specific embodiment
Below with reference to test example and specific embodiment, the present invention is described in further detail.But this should not be understood
It is all that this is belonged to based on the technology that the content of present invention is realized for the scope of the above subject matter of the present invention is limited to the following embodiments
The range of invention.
<embodiment 1>
A kind of antioxidative graphite electrode of nano-graphene enhancing, including graphite electrode matrix, are wrapped up in matrix surface
There is anti oxidation layer, the anti oxidation layer includes the following component of weight percent: graphene 5%, silicon carbide 10%, kaolin
45%, titanium dioxide 15%, calcium oxide 25%.
<embodiment 2>
A kind of antioxidative graphite electrode of nano-graphene enhancing, including graphite electrode matrix, are wrapped up in matrix surface
There is anti oxidation layer, for anti oxidation layer with a thickness of 20 μm, the anti oxidation layer includes the following component of weight percent: graphene 6%,
Silicon carbide 10%, kaolin 49%, titanium dioxide 15%, calcium oxide 20%.
The preparation method is as follows:
(1) graphene, silicon carbide, kaolin, titanium dioxide, calcium oxide are taken, ball milling is situated between as ball milling for 24 hours, using ethyl alcohol
Matter, ratio of grinding media to material 5:1.
(2) after the completion of ball milling, feed liquid is poured out, with ethanol washing abrading-ball, merging feed liquid is configured to the slurry of solid content 25%
Material, is so coated on graphite electrode surface for this slurry, and 500 DEG C of dry 40min obtain the graphite electrode of surface oxidation-resistant enhancing.
<embodiment 3>
A kind of antioxidative graphite electrode of nano-graphene enhancing, including graphite electrode matrix, are wrapped up in matrix surface
There is anti oxidation layer, for anti oxidation layer with a thickness of 10 μm, the anti oxidation layer includes the following component of weight percent: graphene 3%,
Silicon carbide 7%, kaolin 50%, titanium dioxide 15%, calcium oxide 25%.
The preparation method is as follows:
(1) graphene, silicon carbide, kaolin, titanium dioxide, calcium oxide are taken, ball milling 18h is situated between using ethyl alcohol as ball milling
Matter, ratio of grinding media to material 3:1.
(2) after the completion of ball milling, feed liquid is poured out, with ethanol washing abrading-ball, merging feed liquid is configured to the slurry of solid content 25%
Material, is so coated on graphite electrode surface for this slurry, and 500 DEG C of dry 30min obtain the graphite electrode of surface oxidation-resistant enhancing.
<embodiment 4>
A kind of antioxidative graphite electrode of nano-graphene enhancing, including graphite electrode matrix, are wrapped up in matrix surface
There is anti oxidation layer, for anti oxidation layer with a thickness of 12 μm, the anti oxidation layer includes the following component of weight percent: graphene 3%,
Silicon carbide 7%, kaolin 50%, titanium dioxide 15%, calcium oxide 25%.
The preparation method is as follows:
(1) graphene, silicon carbide, kaolin, titanium dioxide, calcium oxide are taken, ball milling 18h is situated between using ethyl alcohol as ball milling
Matter, ratio of grinding media to material 3:1.
(2) after the completion of ball milling, feed liquid is poured out, with ethanol washing abrading-ball, merging feed liquid is configured to the slurry of solid content 15%
Material, is so coated on graphite electrode surface for this slurry, and 550 DEG C of dry 25min obtain the graphite electrode of surface oxidation-resistant enhancing.
<embodiment 5>
A kind of antioxidative graphite electrode of nano-graphene enhancing, including graphite electrode matrix, are wrapped up in matrix surface
There is anti oxidation layer, for anti oxidation layer with a thickness of 10 μm, the anti oxidation layer includes the following component of weight percent: graphene 3%,
Silicon carbide 7%, kaolin 50%, titanium dioxide 15%, calcium oxide 25%.
The preparation method is as follows:
(1) graphene, silicon carbide, kaolin, titanium dioxide, calcium oxide are taken, ball milling 18h is situated between using ethyl alcohol as ball milling
Matter, ratio of grinding media to material 3:1.
(2) after the completion of ball milling, feed liquid is poured out, with ethanol washing abrading-ball, merging feed liquid is configured to the slurry of solid content 15%
Material.Slurry is ultrasonically treated 10min, this slurry is so coated on graphite electrode surface, it is anti-to obtain surface by 585 DEG C of dry 25min
Aoxidize the graphite electrode of enhancing.
<embodiment 6>
A kind of antioxidative graphite electrode of nano-graphene enhancing, including graphite electrode matrix, are wrapped up in matrix surface
There is anti oxidation layer, for anti oxidation layer with a thickness of 10 μm, the anti oxidation layer includes the following component of weight percent: graphene 3%,
Silicon carbide 7%, kaolin 50%, titanium dioxide 15%, calcium oxide 25%.
The preparation method is as follows:
(1) graphene, silicon carbide, kaolin, titanium dioxide, calcium oxide are taken, ball milling is situated between as ball milling for 24 hours, using ethyl alcohol
Matter, ratio of grinding media to material 5:1.
(2) after the completion of ball milling, feed liquid is poured out, with ethanol washing abrading-ball, merging feed liquid is configured to the slurry of solid content 15%
Material.Slurry is ultrasonically treated 20min, this slurry is so coated on graphite electrode surface, it is anti-to obtain surface by 620 DEG C of dry 25min
Aoxidize the graphite electrode of enhancing.
<comparative example 1>
A kind of antioxidative graphite electrode of nano-graphene enhancing, including graphite electrode matrix, are wrapped up in matrix surface
There is anti oxidation layer, for anti oxidation layer with a thickness of 10 μm, the anti oxidation layer includes the following component of weight percent: silicon carbide
10%, kaolin 50%, titanium dioxide 15%, calcium oxide 25%.
The preparation method is as follows:
(1) take silicon carbide, kaolin, titanium dioxide, calcium oxide, ball milling for 24 hours, using ethyl alcohol as ball-milling medium, ball material
Compare 5:1.
(2) after the completion of ball milling, feed liquid is poured out, with ethanol washing abrading-ball, merging feed liquid is configured to the slurry of solid content 15%
Material.Slurry is ultrasonically treated 20min, this slurry is so coated on graphite electrode surface, it is anti-to obtain surface by 620 DEG C of dry 25min
Aoxidize the graphite electrode of enhancing.
<comparative example 2>
A kind of antioxidative graphite electrode of nano-graphene enhancing, including graphite electrode matrix, are wrapped up in matrix surface
There is anti oxidation layer, for anti oxidation layer with a thickness of 10 μm, the anti oxidation layer includes the following component of weight percent: graphene 3%,
Silicon carbide 7%, kaolin 50%, titanium dioxide 15%, calcium oxide 25%.
The preparation method is as follows:
(1) graphene, silicon carbide, kaolin, titanium dioxide, calcium oxide are taken, ball milling is situated between as ball milling for 24 hours, using ethyl alcohol
Matter, ratio of grinding media to material 5:1.
(2) after the completion of ball milling, feed liquid is poured out, with ethanol washing abrading-ball, merging feed liquid is configured to the slurry of solid content 40%
Material.Slurry is ultrasonically treated 20min, this slurry is so coated on graphite electrode surface, it is anti-to obtain surface by 620 DEG C of dry 25min
Aoxidize the graphite electrode of enhancing.
Test
The graphite electrode of surface oxidation-resistant enhancing prepared by above-described embodiment and comparative example, carries out inoxidizability respectively
It can test.Test method is as follows: graphite electrode is put into heating furnace kiln, is heated to 850 DEG C of temperature, keeps the temperature 30min, while to
Fresh air is passed through according to 1% air charge rate per minute in stove, after soaking time, continues to be passed through air, until cooling
To room temperature.The antioxygenic property of graphite electrode is investigated according to the weight-loss ratio of graphite electrode, it is as a result as follows.
1 test result of table
| Surface integrity | Weight-loss ratio/% | |
| Embodiment 2 | It is excellent | 6.8 |
| Embodiment 3 | It is excellent | 6.4 |
| Embodiment 4 | It is excellent | 6.2 |
| Embodiment 5 | It is excellent | 5.2 |
| Embodiment 6 | It is excellent | 4.6 |
| Comparative example 1 | It is excellent | 10.2 |
| Comparative example 2 | Partial exfoliation | 13.5 |
Test result shows that embodiment 1-4 can preferably keep graphite electrode surface anti oxidation layer structural intergrity, together
When inside graphite electrode matrix weight-loss ratio it is relatively low.In contrast, 5 drying temperature of embodiment reaches 585 DEG C, is sintered for oxygen
The stability for changing calcium is promoted significantly, and the synthesis antioxygenic property of anti oxidation layer is outstanding.Graphite electrode is in high-temperature air oxidation atmosphere
Under the conditions of weight-loss ratio it is low, oxidation barriering effect it is good.Comparative example 1 lacks graphene, anti oxidation layer ingredient synergistic effect inoxidizability
Can be bad, weight-loss ratio is higher.2 solids in pulp amount of comparative example is higher, bad coated in the combination fastness on graphite electrode, test
The problem of protrusion falls off in the process causes Graphite Electrode Oxidation at High-Temperature weightless significant, and anti oxidation layer is entirely ineffective.
Claims (9)
1. a kind of nano-graphene enhances antioxidative graphite electrode, which is characterized in that including graphite electrode matrix, in matrix
It is coated with anti oxidation layer, the anti oxidation layer includes the following component of weight percent: graphene 2-6%, silicon carbide 5-
10%, kaolin 40-50%, titanium dioxide 10-20%, calcium oxide 20-30%.
2. nano-graphene as described in claim 1 enhances antioxidative graphite electrode, which is characterized in that the anti oxidation layer
Following component comprising weight percent: graphene 3-6%, silicon carbide 6-10%, kaolin 40-50%, titanium dioxide 10-15%,
Calcium oxide 20-30%.
3. nano-graphene as claimed in claim 2 enhances antioxidative graphite electrode, which is characterized in that the anti oxidation layer
Following component comprising weight percent: graphene 3-6%, silicon carbide 7-10%, kaolin 45-50%, titanium dioxide 10-15%,
Calcium oxide 20-28%.
4. nano-graphene as described in claim 1 enhances antioxidative graphite electrode, which is characterized in that the anti oxidation layer
With a thickness of 10-20 μm.
5. nano-graphene as claimed in claim 4 enhances antioxidative graphite electrode, which is characterized in that the anti oxidation layer
10-15 μm of thickness.
6. a kind of method for preparing above-mentioned graphite electrode, comprising the following steps:
(1) graphene, silicon carbide, kaolin, titanium dioxide, calcium oxide are taken, ball milling 12-48h is situated between using ethyl alcohol as ball milling
Matter, ratio of grinding media to material 3-5:1；
(2) after the completion of ball milling, feed liquid is poured out, with ethanol washing abrading-ball, merging feed liquid is configured to the slurry of solid content 10-25%,
This slurry is so coated on graphite electrode surface, 450-650 DEG C of drying obtains the graphite electrode of surface oxidation-resistant enhancing.
7. preparation method according to claim 8, which is characterized in that step 1 prepare slurry before coating, by ultrasound
Handle 10-30min.
8. preparation method according to claim 8, which is characterized in that step 2,550-650 DEG C of drying temperature.
9. preparation method according to claim 8, which is characterized in that step 2, drying time 10-60min.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811044313.1A CN109020623A (en) | 2018-09-07 | 2018-09-07 | A kind of antioxidative graphite electrode of nano-graphene enhancing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811044313.1A CN109020623A (en) | 2018-09-07 | 2018-09-07 | A kind of antioxidative graphite electrode of nano-graphene enhancing |
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| CN109020623A true CN109020623A (en) | 2018-12-18 |
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| CN201811044313.1A Withdrawn CN109020623A (en) | 2018-09-07 | 2018-09-07 | A kind of antioxidative graphite electrode of nano-graphene enhancing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111892833A (en) * | 2020-08-14 | 2020-11-06 | 北京中科原创节能环保科技有限公司 | Superconductive graphite electrode nano antioxidant and preparation method thereof |
-
2018
- 2018-09-07 CN CN201811044313.1A patent/CN109020623A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111892833A (en) * | 2020-08-14 | 2020-11-06 | 北京中科原创节能环保科技有限公司 | Superconductive graphite electrode nano antioxidant and preparation method thereof |
| CN111892833B (en) * | 2020-08-14 | 2022-01-07 | 北京中科原创节能环保科技有限公司 | Superconductive graphite electrode nano antioxidant and preparation method thereof |
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