CN108585864A - A kind of manufacturing process of composite graphite electrode - Google Patents
A kind of manufacturing process of composite graphite electrode Download PDFInfo
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- CN108585864A CN108585864A CN201810567112.3A CN201810567112A CN108585864A CN 108585864 A CN108585864 A CN 108585864A CN 201810567112 A CN201810567112 A CN 201810567112A CN 108585864 A CN108585864 A CN 108585864A
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Abstract
The invention discloses a kind of manufacturing process of composite graphite electrode, include the following steps：S100, dispensing, S200, molding, S300, roasting and dipping, S400, graphitization, S500, machining.Present invention process is simple, and manufacturing cost is relatively low, and end properties are not weaker than mainstream finished product in the market, even better than import finished product.Therefore, it is possible to bring the profit margin of bigger for enterprise, the competitiveness of enterprise is improved.
Description
Technical field
The present invention relates to a kind of graphite electrode manufacturing process, more particularly to a kind of manufacturing process of composite graphite electrode.
Background technology
Graphite electrode refers to using petroleum coke, pitch coke as aggregate, and coal tar pitch is adhesive, by raw material calcining, broken mill
Powder, dispensing, kneading, molding, roasting, dipping, graphitization and mechanical processing and a kind of manufactured high temperature resistant graphite conductive material.
It is widely used in：
(1) it is used for electrical arc furnace
Electric furnace steel making is the use rich and influential family of graphite electrode.China's electric furnace output of steel accounts for about 18% or so of crude steel yield, steel-making stone
Electrode ink accounts for the 70%~80% of the total dosage of graphite electrode.Electric furnace steel making is that electric current is imported into stove using graphite electrode, utilizes electricity
Extremely high temperature heat source caused by starting arc is smelted between portion and furnace charge.
(2) it is used for ore-smelting electric furnace
Ore-smelting electric furnace is mainly for the production of industrial silicon and yellow phosphorus etc., its main feature is that the lower part of conductive electrode is embedded in furnace charge, is expecting
Electric arc is formed in layer, and heats furnace charge using the thermal energy that the resistance of furnace charge itself is sent out, wherein requiring current density higher
Ore-smelting electric furnace need to use graphite electrode, such as often production 1t silicon need to consume graphite electrode about 100kg, often produce 1t yellow phosphorus need to consume
Graphite electrode about 40kg.
(3) it is used for resistance furnace
The electric furnace etc. for producing the graphitizing furnace of graphite product, the melting furnaces for melting glass and production silicon carbide belongs to resistance furnace,
Interior the filled material of stove is both heating resistor and by heating target, in general, conductive graphite electrode is embedded in resistance end furnace
In burner wall, discontinuously consumed for graphite electrode herein.
(4) special-shaped graphite products are used to prepare
The blank of graphite electrode is additionally operable to be processed into the special-shaped graphite products such as various crucibles, mold, boat and heater.For example,
In quartz glass industry, 1t electric smelting pipes are often produced, graphite electrode stock 10t need to be used；1t quartz bricks are often produced, graphite electricity need to be consumed
Pole blank 100kg.
The manufacturing process of graphite electrode is very ripe and diversified at present, and end properties are also relatively high, but each
The manufacturing process of producer belongs to confidential state or by patent protection, and therefore, it is necessary to enter the manufacturing field of graphite electrode to be just engaged in
Must design it is a kind of it is completely new, with the distinguishing manufacturing process of the prior art, but currently, the manufacturing process by designed, designed is wanted
Complex process, yield rate are low, cause cost increase so that enterprise loses competitiveness；Poor product quality so that enterprise is competing
It is poor to strive power.
Therefore, applicant proposes a kind of manufacturing process of composite graphite electrode, simple for process, and cost is relatively low, still
End properties disclosure satisfy that current demand.
Invention content
In view of the drawbacks described above of the prior art, technical problem to be solved by the invention is to provide a kind of composite graphite electricity
The manufacturing process of pole.
To achieve the above object, the present invention provides a kind of manufacturing process of composite graphite electrode, include the following steps：
S100, dispensing
S110, raw material, petroleum coke, needle coke, modified coal asphalt, graphite oxide, titanium dioxide, absolute ethyl alcohol, amino anthraquinones；
The petroleum coke is that low-sulfur is burnt；The needle coke uses coal-based needle coke；
The softening point of the modified coal asphalt is 100-120 DEG C, and coking value is >=55%, ash content≤0.15%；
Titanium dioxide, cobalt sulfide fineness are not less than 90 mesh；
S120,0.3g graphite oxides and 0.5g diacetone alcohol are poured into respectively in the dimethylformamide of 30ml, ultrasonic wave dispersion
1h, then above-mentioned solution is added in graphite oxide, stirring is for 24 hours；
Solid is filtered, after being washed 4-6 times with deionized water and ethyl alcohol, drying；
Then hydrogen iodide will be poured into solid, and is heated to 60 DEG C, be filtered after 24 hours, be cleaned hydrogen iodide with deionized water,
Then it dries, obtains graphene/amino anthraquinones composite material（Hereinafter composite material）；
S130, petroleum coke, needle coke are crushed, fine grinding, its grain size is made to be not more than 0.075 ㎜；
S140, S130 is crushed after petroleum coke, needle coke, titanium dioxide is uniformly mixed according to following weight part ratio：10-
15:20-30：Then 1-3 is added ethyl alcohol and carries out wet mixing 30-40min first by two kinds of dry-mixed 10-20min of fines in mixed process
After dry；
S150, the mixed fineves of S140 are uniformly mixed with modified coal asphalt, composite material according to following weight part ratio：
10-15：7-10、2-4；
S200, molding
S210, by S150, treated that raw material is stirred, and raw material is heated to 160-200 DEG C, stirs 1-2 hours；
S220, it mixed raw material in S210 is put into forcing press is compacted by 6-8MPa；
S230, by treated in S220, raw material is put into extruder, carries out extrusion forming by the pressure of 10-15MPa, then
Section is cut into according to preset requirement（Green compact）, it is air-cooled to room temperature to cut into the raw material after section；
S300, roasting and dipping
S310, primary roasting, the raw material cut off in S230 is put into roaster, is roasted by 1150 DEG C of high temperature, and fill
Enter to protect gas（Argon gas）, heating mode is as follows：
It 0-400 DEG C, 15 DEG C/h, is kept for 5-8 hours after reaching 400 DEG C；
It 400-800 DEG C, 40 DEG C/h, is kept for 5-8 hours after reaching 800 DEG C；
800-1150 DEG C, 5-10 DEG C/h, reach 1150 DEG C or so rear holdings 100-180 hours；
After the completion of roasting, stops heating, be cooled to room temperature in roaster；
Coal tar pitch coking in roasting process in green compact, the fugitive constituent of discharge 10% or so, while volume generates the contraction of 2-3%,
Mass loss 8-10%.Significant changes also have occurred in the physicochemical property of charcoal base, since the porosity increases bulk density by 1.70g/
Cm3 is reduced to 1.60g/cm3, and 10000 μ Ω .m of resistivity or so are down to 40-50 μ Ω .m, and the mechanical strength for roasting base also greatly carries
It is high.
S310 treated raw materials are carried out removing surface, mainly remove flash removed, be then placed in dipping by S320, dipping
In tank, and it is preheated to 280-350 DEG C, is kept for 6-8 hours；
Then it after coal tar pitch being heated to 350-450 DEG C, is kept for 2-3 hours, is reinjected in impregnating autoclave so that raw material is completely immersed in
In coal tar pitch；
Then, protection gas is added in impregnating autoclave（Argon gas）, after air pressure reaches 4-8MPa, kept for 3-4 hours, while will leaching
Temperature is maintained at 400-500 DEG C in stain tank；
Last pressure release, is discharged coal tar pitch, and raw material is cooled to room temperature in impregnating autoclave, takes out and clear up surface；
S330, after baking, by S320, treated that raw material is placed again into roaster, is roasted again by 1600 DEG C of high temperature
It burns, and is filled with protection gas（Argon gas）, heating mode is as follows：
It 0-400 DEG C, 10-15 DEG C/h, is kept for 8-10 hours after reaching 400 degrees Celsius；
It 400-800 DEG C, 30-50 DEG C/h, is kept for 8-10 hours after reaching 800 DEG C；
It 800-1600 DEG C, 5-15 DEG C/h, is kept for 100-150 hours after reaching 1600 DEG C, is then cooled to room temperature in roaster,
Take out cleaning surface；It is crackle in order to prevent to reduce heating rate herein.
After baking is roasted again after roasting product impregnates, the technique for making the pitch in immersion roasting product hole carbonize
Process.
S340, S320-S330 is repeated at least twice；
S400, graphitization, by S340, treated that raw material is put into internal thermal serial (LWG) stove, is filled with protective gas and is heated to
It 3000 DEG C, is kept for 100-200 hours, keeps its graphitization, specific heating mode as follows：
0-800 DEG C, continuous 20-30 DEG C of two hourly averages temperature rise rate；
800-1400 DEG C, continuous 40-50 DEG C of two hourly averages temperature rise rate；
1400-2100 DEG C, continuous 10-20 DEG C of two hourly averages temperature rise rate；And it is kept for 20-30 hours after reaching 2100；
2100-3000 DEG C, continuous 60-70 DEG C of two hourly averages temperature rise rate is kept for 100-200 hours after reaching 3000 DEG C；
Raw material can be made to reach following effect by this step：
1. the conduction of high Carbon Materials, thermal conductivity（Resistivity reduces 4-5 times, and thermal conductivity improves about 10 times）；
Performance and chemical stability 2. the heat resistanceheat resistant for improving Carbon Materials is shaken（Linear expansion coefficient reduces 50-80%）；
3. making Carbon Materials that there is lubricity and wear resistence；
4. impurity is discharged, the purity of Carbon Materials is improved（The ash content of product drops to 0.3% or so by 0.5-0.8%）.
S500, machining, by S400, treated that raw material is machined out, and until reaching pre-set dimension, that is, produces stone
Electrode ink.
The beneficial effects of the invention are as follows：Present invention process is simple, and manufacturing cost is relatively low, and end properties are not weaker than in the market
Mainstream finished product, even better than import finished product.Therefore, it is possible to bring the profit margin of bigger for enterprise, the competition of enterprise is improved
Power.
Specific implementation mode
With reference to embodiment, the invention will be further described：
Embodiment one
A kind of manufacturing process of composite graphite electrode, includes the following steps：
S100, dispensing
S110, raw material, petroleum coke, needle coke, modified coal asphalt, graphite oxide, titanium dioxide, absolute ethyl alcohol, amino anthraquinones；
The petroleum coke is that low-sulfur is burnt；The needle coke uses coal-based needle coke；
The softening point of the modified coal asphalt is 100-120 DEG C, and coking value is >=55%, ash content≤0.15%；
Titanium dioxide, cobalt sulfide fineness are not less than 90 mesh；
S120,0.3g graphite oxides and 0.5g diacetone alcohol are poured into respectively in the dimethylformamide of 30ml, ultrasonic wave dispersion
1h, then above-mentioned solution is added in graphite oxide, stirring is for 24 hours；
Solid is filtered, after being washed 4-6 times with deionized water and ethyl alcohol, drying；
Then hydrogen iodide will be poured into solid, and is heated to 60 DEG C, be filtered after 24 hours, be cleaned hydrogen iodide with deionized water,
Then it dries, obtains composite material；
S130, petroleum coke, needle coke are crushed, fine grinding, its grain size is made to be not more than 0.075 ㎜；
S140, S130 is crushed after petroleum coke, needle coke, titanium dioxide is uniformly mixed according to following weight part ratio：12:
30：2, first by two kinds of dry-mixed 10-20min of fines in mixed process, then it is added after ethyl alcohol carries out wet mixing 30-40min and dries；
S150, the mixed fineves of S140 are uniformly mixed with modified coal asphalt, composite material according to following weight part ratio：
15：10：3；
S200, molding
S210, by S150, treated that raw material is stirred, and raw material is heated to 180 DEG C, stirs 1-2 hours；
S220, it mixed raw material in S210 is put into forcing press is compacted by 6-8MPa；
S230, by treated in S220, raw material is put into extruder, carries out extrusion forming by the pressure of 10-15MPa, then
Section is cut into according to preset requirement（Green compact）, it is air-cooled to room temperature to cut into the raw material after section；
S300, roasting and dipping
S310, primary roasting, the raw material cut off in S230 is put into roaster, is roasted by 1150 DEG C of high temperature, and fill
Enter to protect gas（Argon gas）, heating mode is as follows：
It 0-400 DEG C, 15 DEG C/h, is kept for 6 hours after reaching 400 DEG C；
It 400-800 DEG C, 40 DEG C/h, is kept for 6 hours after reaching 800 DEG C；
800-1150 DEG C, 8 DEG C/h, reach 1150 DEG C or so it is rear keep 150 hours；
After the completion of roasting, stops heating, be cooled to room temperature in roaster；
S310 treated raw materials are carried out removing surface, mainly remove flash removed, be then placed in impregnating autoclave by S320, dipping,
And 300 DEG C are preheated to, it is kept for 8 hours；
Then it after coal tar pitch being heated to 400 DEG C, is kept for 2-3 hours, is reinjected in impregnating autoclave so that raw material is completely immersed in coal drip
In blueness；
Then, protection gas is added in impregnating autoclave（Argon gas）, after air pressure reaches 6MPa, kept for 3-4 hours, while will dipping
Temperature is maintained at 460 DEG C in tank；
Last pressure release, is discharged coal tar pitch, and raw material is cooled to room temperature in impregnating autoclave, takes out and clear up surface；
S330, after baking, by S320, treated that raw material is placed again into roaster, is roasted again by 1600 DEG C of high temperature
It burns, and is filled with protection gas（Argon gas）, heating mode is as follows：
It 0-400 DEG C, 12 DEG C/h, is kept for 10 hours after reaching 400 degrees Celsius；
It 400-800 DEG C, 40 DEG C/h, is kept for 10 hours after reaching 800 DEG C；
It 800-1600 DEG C, 12 DEG C/h, is kept for 120 hours after reaching 1600 DEG C, is then cooled to room temperature in roaster, taken out clear
Manage surface；It is crackle in order to prevent to reduce heating rate herein.
After baking is roasted again after roasting product impregnates, the technique for making the pitch in immersion roasting product hole carbonize
Process.
S340, S320-S330 is repeated at least twice；
S400, graphitization, by S340, treated that raw material is put into internal thermal serial (LWG) stove, is filled with protective gas and is heated to
It 3000 DEG C, is kept for 180 hours, keeps its graphitization, specific heating mode as follows：
0-800 DEG C, continuous 28 DEG C of two hourly averages temperature rise rate；
800-1400 DEG C, continuous 45 DEG C of two hourly averages temperature rise rate；
1400-2100 DEG C, continuous 18 DEG C of two hourly averages temperature rise rate；And it is kept for 25 hours after reaching 2100；
2100-3000 DEG C, continuous 65 DEG C of two hourly averages temperature rise rate is kept for 180 hours after reaching 3000 DEG C；
S500, machining, by S400, treated that raw material is machined out, and until reaching pre-set dimension, that is, produces graphite electricity
Pole.
Embodiment two
A kind of manufacturing process of composite graphite electrode, includes the following steps：
S100, dispensing
S110, raw material, petroleum coke, needle coke, modified coal asphalt, graphite oxide, titanium dioxide, absolute ethyl alcohol, amino anthraquinones；
The petroleum coke is that low-sulfur is burnt；The needle coke uses coal-based needle coke；
The softening point of the modified coal asphalt is 100-120 DEG C, and coking value is >=55%, ash content≤0.15%；
Titanium dioxide, cobalt sulfide fineness are not less than 90 mesh；
S120,0.3g graphite oxides and 0.5g diacetone alcohol are poured into respectively in the dimethylformamide of 30ml, ultrasonic wave dispersion
1h, then above-mentioned solution is added in graphite oxide, stirring is for 24 hours；
Solid is filtered, after being washed 4-6 times with deionized water and ethyl alcohol, drying；
Then hydrogen iodide will be poured into solid, and is heated to 60 DEG C, be filtered after 24 hours, be cleaned hydrogen iodide with deionized water,
Then it dries, obtains composite material；
S130, petroleum coke, needle coke are crushed, fine grinding, its grain size is made to be not more than 0.075 ㎜；
S140, S130 is crushed after petroleum coke, needle coke, titanium dioxide is uniformly mixed according to following weight part ratio：15:
25：3, first by two kinds of dry-mixed 10-20min of fines in mixed process, then it is added after ethyl alcohol carries out wet mixing 30-40min and dries；
S150, the mixed fineves of S140 are uniformly mixed with modified coal asphalt, composite material according to following weight part ratio：
12：8、4；
S200, molding
S210, by S150, treated that raw material is stirred, and raw material is heated to 160-200 DEG C, stirs 1-2 hours；
S220, it mixed raw material in S210 is put into forcing press is compacted by 6-8MPa；
S230, by treated in S220, raw material is put into extruder, carries out extrusion forming by the pressure of 10-15MPa, then
Section is cut into according to preset requirement（Green compact）, it is air-cooled to room temperature to cut into the raw material after section；
S300, roasting and dipping
S310, primary roasting, the raw material cut off in S230 is put into roaster, is roasted by 1150 DEG C of high temperature, and fill
Enter to protect gas（Argon gas）, heating mode is as follows：
It 0-400 DEG C, 15 DEG C/h, is kept for 8 hours after reaching 400 DEG C；
It 400-800 DEG C, 40 DEG C/h, is kept for 8 hours after reaching 800 DEG C；
800-1150 DEG C, 8 DEG C/h, reach 1150 DEG C or so it is rear keep 160 hours；
After the completion of roasting, stops heating, be cooled to room temperature in roaster；
S310 treated raw materials are carried out removing surface, mainly remove flash removed, be then placed in impregnating autoclave by S320, dipping,
And 320 DEG C are preheated to, it is kept for 7 hours；
Then it after coal tar pitch being heated to 380 DEG C, is kept for 2-3 hours, is reinjected in impregnating autoclave so that raw material is completely immersed in coal drip
In blueness；
Then, protection gas is added in impregnating autoclave（Argon gas）, after air pressure reaches 8MPa, kept for 3-4 hours, while will dipping
Temperature is maintained at 500 DEG C in tank；
Last pressure release, is discharged coal tar pitch, and raw material is cooled to room temperature in impregnating autoclave, takes out and clear up surface；
S330, after baking, by S320, treated that raw material is placed again into roaster, is roasted again by 1600 DEG C of high temperature
It burns, and is filled with protection gas（Argon gas）, heating mode is as follows：
It 0-400 DEG C, 15 DEG C/h, is kept for 9 hours after reaching 400 degrees Celsius；
It 400-800 DEG C, 50 DEG C/h, is kept for 9 hours after reaching 800 DEG C；
It 800-1600 DEG C, 10 DEG C/h, is kept for 140 hours after reaching 1600 DEG C, is then cooled to room temperature in roaster, taken out clear
Manage surface；It is crackle in order to prevent to reduce heating rate herein.
S340, S320-S330 is repeated at least twice；
S400, graphitization, by S340, treated that raw material is put into internal thermal serial (LWG) stove, is filled with protective gas and is heated to
It 3000 DEG C, is kept for 150 hours, keeps its graphitization, specific heating mode as follows：
0-800 DEG C, continuous 30 DEG C of two hourly averages temperature rise rate；
800-1400 DEG C, continuous 50 DEG C of two hourly averages temperature rise rate；
1400-2100 DEG C, continuous 10 DEG C of two hourly averages temperature rise rate；And it is kept for 30 hours after reaching 2100；
2100-3000 DEG C, continuous 70 DEG C of two hourly averages temperature rise rate is kept for 150 hours after reaching 3000 DEG C；
S500, machining, by S400, treated that raw material is machined out, and until reaching pre-set dimension, that is, produces graphite electricity
Pole.
Place is not described in detail by the present invention, is the known technology of those skilled in the art.
The preferred embodiment of the present invention has been described in detail above.It should be appreciated that those skilled in the art without
It needs creative work according to the present invention can conceive and makes many modifications and variations.Therefore, all technologies in the art
Personnel are available by logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Technical solution, all should be in the protection domain being defined in the patent claims.
Claims (5)
1. a kind of manufacturing process of composite graphite electrode, which is characterized in that include the following steps：
S100, dispensing
S110, raw material, petroleum coke, needle coke, modified coal asphalt, graphite oxide, titanium dioxide, absolute ethyl alcohol, amino anthraquinones；
S120,0.3g graphite oxides and 0.5g diacetone alcohol are poured into respectively in the dimethylformamide of 30ml, ultrasonic wave dispersion
1h, then above-mentioned solution is added in graphite oxide, stirring is for 24 hours；
Solid is filtered, after being washed 4-6 times with deionized water and ethyl alcohol, drying；
Then hydrogen iodide will be poured into solid, and is heated to 60 DEG C, be filtered after 24 hours, be cleaned hydrogen iodide with deionized water,
Then it dries, obtains composite material；
S130, petroleum coke, needle coke are crushed, fine grinding, its grain size is made to be not more than 0.075 ㎜；
S140, S130 is crushed after petroleum coke, needle coke, titanium dioxide is uniformly mixed according to following weight part ratio：10-
15:20-30：Then 1-3 is added ethyl alcohol and carries out wet mixing 30-40min first by two kinds of dry-mixed 10-20min of fines in mixed process
After dry；
S150, the mixed fineves of S140 are uniformly mixed with modified coal asphalt, composite material according to following weight part ratio：
10-15：7-10、2-4；
S200, molding
S210, by S150, treated that raw material is stirred, and raw material is heated to 160-200 DEG C, stirs 1-2 hours；
S220, it mixed raw material in S210 is put into forcing press is compacted by 6-8MPa；
S230, by treated in S220, raw material is put into extruder, carries out extrusion forming by the pressure of 10-15MPa, then
Section is cut into according to preset requirement, it is air-cooled to room temperature to cut into the raw material after section；
S300, roasting and dipping
S310, primary roasting, the raw material cut off in S230 is put into roaster, is roasted by 1150 DEG C of high temperature, and fill
Enter to protect gas；
S310 treated raw materials are carried out removing surface, mainly remove flash removed, be then placed in impregnating autoclave by S320, dipping,
And it is preheated to 280-350 DEG C, it is kept for 6-8 hours；
Then it after coal tar pitch being heated to 350-450 DEG C, is kept for 2-3 hours, is reinjected in impregnating autoclave so that raw material is completely immersed in
In coal tar pitch；
Then, protection gas is added in impregnating autoclave, after air pressure reaches 4-8MPa, is kept for 3-4 hours, while will be in impregnating autoclave
Temperature is maintained at 400-500 DEG C；
Last pressure release, is discharged coal tar pitch, and raw material is cooled to room temperature in impregnating autoclave, takes out and clear up surface；
S330, after baking, by S320, treated that raw material is placed again into roaster, is roasted again by 1600 DEG C of high temperature
It burns, and is filled with protection gas, be then cooled to room temperature in roaster, take out cleaning surface；
S340, S320-S330 is repeated at least twice；
S400, graphitization, by S340, treated that raw material is put into internal thermal serial stove, is filled with protective gas and is heated to 3000
DEG C, it is kept for 100-200 hours, makes its graphitization；
S500, machining, by S400, treated that raw material is machined out, and until reaching pre-set dimension, that is, produces graphite electricity
Pole.
2. manufacturing process as described in claim 1, which is characterized in that the petroleum coke is that low-sulfur is burnt；The needle coke
Using coal-based needle coke；
The softening point of the modified coal asphalt is 100-120 DEG C, and coking value is >=55%, ash content≤0.15%；
Titanium dioxide, cobalt sulfide fineness are not less than 90 mesh.
3. manufacturing process as described in claim 1, which is characterized in that in S310, heating mode is as follows：
It 0-400 DEG C, 15 DEG C/h, is kept for 5-8 hours after reaching 400 DEG C；
It 400-800 DEG C, 40 DEG C/h, is kept for 5-8 hours after reaching 800 DEG C；
800-1150 DEG C, 5-10 DEG C/h, reach 1150 DEG C or so rear holdings 100-180 hours；
After the completion of roasting, stops heating, be cooled to room temperature in roaster.
4. manufacturing process as described in claim 1, which is characterized in that in S330, heating mode is as follows：
It 0-400 DEG C, 10-15 DEG C/h, is kept for 8-10 hours after reaching 400 degrees Celsius；
It 400-800 DEG C, 30-50 DEG C/h, is kept for 8-10 hours after reaching 800 DEG C；
It 800-1600 DEG C, 5-15 DEG C/h, is kept for 100-150 hours after reaching 1600 DEG C.
5. manufacturing process as described in claim 1, which is characterized in that in S44, heating mode is as follows：
0-800 DEG C, continuous 20-30 DEG C of two hourly averages temperature rise rate；
800-1400 DEG C, continuous 40-50 DEG C of two hourly averages temperature rise rate；
1400-2100 DEG C, continuous 10-20 DEG C of two hourly averages temperature rise rate；And it is kept for 20-30 hours after reaching 2100；
2100-3000 DEG C, continuous 60-70 DEG C of two hourly averages temperature rise rate is kept for 100-200 hours after reaching 3000 DEG C.
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104129782A (en) * | 2014-07-30 | 2014-11-05 | 焦作市中州炭素有限责任公司 | Graphite electrode with diameter of 348 mm and manufacture method thereof |
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2018
- 2018-06-05 CN CN201810567112.3A patent/CN108585864A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104129782A (en) * | 2014-07-30 | 2014-11-05 | 焦作市中州炭素有限责任公司 | Graphite electrode with diameter of 348 mm and manufacture method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 任坚理: "石墨烯/氨基蒽醌复合电极材料的制备与性能研究", 《中国学术期刊（光盘版）》 * |
| 赵志凤: "《炭材料工艺基础》", 31 July 2017, 哈尔滨工业大学出版社 * |
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