CN109732752A - A kind of graphite electrode production raw material die mould method - Google Patents
A kind of graphite electrode production raw material die mould method Download PDFInfo
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Abstract
The present invention discloses a kind of graphite electrode production raw material die mould method, comprising the following steps: ingredient detection, mixture drying, mixture pinch mixed, extrusion forming, green compact cooling, die mould detection.To the more demanding of time and temperature during mixture pinches mixed, guarantee to pinch it is mixed after thickener uniformity, protect original particle to form, it is ensured that the bulk density of product increases the plasticity and mechanical performance of thickener；During extrusion forming, progress constant temperature processing first, then precompressed processing is carried out, it finally carries out making extruding firm by ramming, the high power or ultra high power graphite electrode of big specification can be produced.
Description
Technical field
The present invention relates to graphite electrode field, specifically a kind of graphite electrode production raw material die mould method.
Background technique
Graphite electrode, mainly using petroleum coke, needle coke as raw material, coal tar pitch makees bonding agent, through calcining, ingredient, kneading, pressure
Type, roasting, graphitization, machining and be made, be in electric arc furnaces with electrical arc release electric energy heating fusing is carried out to furnace charge
Conductor, according to its quality index height, common power, high power and ultra high power can be divided into.
Pressure-type process paste production system largely uses the cool material system of cooking-pot type kneading+roller or double-deck kneading pot+cool material
System, these pressure-type process paste production systems cannot produce the thickener of homogeneous, so that big rule can not be produced
The high power or ultra high power graphite electrode of lattice.
Summary of the invention
The purpose of the present invention is to provide a kind of graphite electrode production raw material die mould methods, and mixed process is pinched in mixture
In to the more demanding of time and temperature, guarantee to pinch it is mixed after thickener uniformity, protect original particle to form, it is ensured that produce
The bulk density of product increases the plasticity and mechanical performance of thickener；During extrusion forming, progress constant temperature processing first,
Precompressed processing is carried out again, finally carries out making extruding firm by ramming, can produce the high power or ultra high power graphite electrode of big specification.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of graphite electrode production raw material die mould method, comprising the following steps:
A, ingredient detects
The particle purity and powder purity of raw material and mixture before and after ingredient are detected.
B, mixture is dried
Qualified mixture is placed in the heater that temperature is 160-180 degrees Celsius and is heated, 25-35 points of heating
Clock.
C, mixture is pinched mixed
Mixture after heating is put into kneading machine, pinching mixed temperature is 120-130 degrees Celsius, is pinched 15-16 minutes mixed
Afterwards, the mass ratio of addition binder, binder and mixture is 1:5, is stirred 14-15 minutes after binder is added.
The binder is pitch of the softening point at 80-90 degrees Celsius, and after binder is added, the temperature for pinching mixed thickener is mentioned
Height arrives 168-174 degrees Celsius.
D, extrusion forming
It needs the thickener by 168-174 degrees Celsius to be placed in cooler before molding and is cooled to 118-120 degrees Celsius, cool material
Time be 8-11 minute, be placed on warm stage after cool material and kept the temperature, keep the temperature and thickener is launched after twenty minutes.
Mixture is divided 2-4 times and is respectively launched blanking, is made firm by ramming using 35MN hydraulic press, 35MN hydraulic press mouthpiece
Temperature is 110-120 degrees Celsius, expects that the temperature of room is 100-110 degrees Celsius, the specification of progress precompressed processing first, product is different
The pressure of precompressed is different, and squeeze time is 3 minutes.
Vacuumize process is carried out after precompressed, is started to make extruding firm by ramming when vacuum degree is located at -0.06--0.01 megapascal, be made firm by ramming crowded
The time of pressure is 1-1.5 minutes, and the pressure for making extruding firm by ramming is 10-26 megapascal.
E, green compact are cooling
Green compact are cooled down using cooling bath, the water temperature of cooling bath is 20-40 degrees Celsius, and the cooling time is according to environment
Temperature different time changes, and the cooling time of the 11-3 month is 4-4.5 hours, and the cooling time of the 4-10 month is 5-5.5 hours.
F, die mould detects
The bulk density of green compact is detected.
Further, the requirement of the ingredient detection particle purity is 75%-80%, and the requirement of powder purity is 67%-
73%.
Further, the period of the ingredient detection particle purity detecting is 8 hours/time, the detection cycle of powder purity
For 4 hours/time, the detection cycle of particle purity and powder purity for mixture is 8 hours/time.
Further, the blanking make firm by ramming material room temperature use pressure for the steam of 0.44-0.49 megapascal to expect room into
Row heat preservation.
Further, the pressure squeezed when the blanking is made firm by ramming is less than preload pressure.
Beneficial effects of the present invention:
1, graphite electrode production of the present invention with raw material die mould method during mixture pinches mixed to time and temperature
It is more demanding, guarantee the uniformity for pinching mixed rear thickener, protects original particle to form, it is ensured that the bulk density of product increases
The plasticity and mechanical performance of thickener are added；
2, graphite electrode production of the present invention carries out at constant temperature first with raw material die mould method during extrusion forming
Reason, then precompressed processing is carried out, it finally carries out making extruding firm by ramming, the high power or ultra high power graphite electrode of big specification can be produced.
Detailed description of the invention
The present invention will be further described below with reference to the drawings.
Fig. 1 is product of the present invention precompressed parallel tables；
Fig. 2 is that present invention behaviour's product squeezes parallel tables；
Fig. 3 is bulk density examination criteria chart of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts all other
Embodiment shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that, term " aperture ", "upper", "lower", " thickness ", "top", " in ",
Indicating positions or the positional relationship such as " length ", "inner", " surrounding ", are merely for convenience of description of the present invention and simplification of the description, without
It is that the component of indication or suggestion meaning or element must have a particular orientation, is constructed and operated in a specific orientation, therefore not
It can be interpreted as limitation of the present invention.
A kind of graphite electrode production raw material die mould method the following steps are included:
A, ingredient detects
Mixture is prepared according to formula, the particle purity and powder purity of raw material and mixture before and after ingredient are examined
It surveys, the requirement of particle purity is 75%-80%, and the requirement of powder purity is 67%-73%, for the particle purity detecting of raw material
Period be 8 hours/time, the detection cycle of powder purity is 4 hours/time, for the particle purity and powder purity of mixture
Detection cycle be 8 hours/time.
B, mixture is dried
Qualified mixture is placed in the heater that temperature is 160-180 degrees Celsius and is heated, 25-35 points of heating
Clock.
C, mixture is pinched mixed
Mixture after heating is put into kneading machine, pinching mixed temperature is 120-130 degrees Celsius, is pinched 15-16 minutes mixed
Afterwards, the mass ratio of addition binder, binder and mixture is 1:5, is stirred 14-15 minutes after binder is added, binder adds
Enter amount it is very few when, only allow once to be adjusted with binder, but every time be added binder after mixing time be no less than 15 points
Clock could go out to paste, and when binder excess, forbid to adjust oil mass with siccative, and press waste disposal；Pinching mixed purpose is in order to obtain
Uniformly just there is the thickener of good plasticity.
The binder is pitch of the softening point at 80-90 degrees Celsius, and after binder is added, the temperature for pinching mixed thickener is mentioned
Height arrives 168-174 degrees Celsius, pinches the temperature of mixed thickener at 168-174 degrees Celsius, wettability and caking property of the pitch to siccative
Preferably, thickener has good plasticity and extrusion performance, pinches mixed time 19-31 minute most preferably, overlong time can destroy big
Grain destroys original particle composition, so that the bulk density of product reduces, plasticity is deteriorated, and the porosity increases, mechanical strength drop
It is low.
D, extrusion forming
The key step of electrode is manufactured when molding, common forms extrusion forming, vibrating forming and die pressing, this technique
It is made of extrusion forming.
It needs the thickener by 168-174 degrees Celsius to be placed in cooler before molding and is cooled to 118-120 degrees Celsius, cool material
Time be 8-11 minute, be placed on warm stage after cool material and kept the temperature, keep the temperature and thickener is launched after twenty minutes.
Mixture is divided 2-4 times and is respectively launched blanking, is made firm by ramming using 35MN hydraulic press, 35MN hydraulic press mouthpiece
Temperature is 110-120 degrees Celsius, expects that the temperature of room is 100-110 degrees Celsius, uses pressure for the steam pair of 0.44-0.49 megapascal
Material room is kept the temperature, and the pressure of progress precompressed processing first, the specification difference precompressed of product is different, and squeeze time is 3 minutes, tool
Body pressure is as shown in Figure 1.
Vacuumize process is carried out after precompressed, is started to make extruding firm by ramming when vacuum degree is located at -0.06--0.01 megapascal, be made firm by ramming crowded
The time of pressure is 1-1.5 minutes, and the pressure for making extruding firm by ramming is 10-26 megapascal, and the pressure of extruding is less than preload pressure, makes extruding firm by ramming
Speed it is related with the specification of finished product, specific speed is as shown in Figure 2.
When the speed of extruding and squeeze pressure generate conflict, it is subject to and controls extrusion speed.
E, green compact are cooling
Green compact are cooled down using cooling bath, the water temperature of cooling bath is 20-40 degrees Celsius, and the cooling time is according to environment
Temperature different time changes, and the cooling time of the 11-3 month is 4-4.5 hours, and the cooling time of the 4-10 month is 5-5.5 hours.
F, die mould detects
The bulk density of green compact is detected, the specification of product is different, and the standard of detection is different, as shown in Figure 3.
Following embodiment and comparative example use for the graphite electrode profiling of 200~250 millimeters of specifications.
Embodiment 1
A kind of graphite electrode production raw material die mould method, comprising the following steps:
A, ingredient detects
The particle purity and powder purity of raw material and mixture before and after ingredient are detected, and the requirement of particle purity is
75%-80%, the requirement of powder purity are 67%-73%, and the period for the particle purity detecting of raw material is 8 hours/time, powder
The detection cycle of sub- purity is 4 hours/time, the detection cycle of particle purity and powder purity for mixture is 8 hours/
It is secondary.
B, mixture is dried
Qualified mixture is placed in the heater that temperature is 160-180 degrees Celsius and is heated, 25-35 points of heating
Clock.
C, mixture is pinched mixed
Mixture after heating is put into kneading machine, pinching mixed temperature is 120-130 degrees Celsius, is pinched 15-16 minutes mixed
Afterwards, the mass ratio of addition binder, binder and mixture is 1:5, is stirred 14-15 minutes after binder is added.
The binder is pitch of the softening point at 80-90 degrees Celsius, and after binder is added, the temperature for pinching mixed thickener is mentioned
Height arrives 168-174 degrees Celsius.
D, extrusion forming
Need the thickener by 168-174 degrees Celsius to be placed in cooler before molding and be cooled to 118 degrees Celsius, cool material when
Between be 8 minutes, be placed on warm stage after cool material and kept the temperature, heat preservation after twenty minutes launches thickener.
Mixture is divided 2-4 times and is respectively launched blanking, is made firm by ramming using 35MN hydraulic press, 35MN hydraulic press mouthpiece
Temperature is 110-120 degrees Celsius, expects that the temperature of room is 100-110 degrees Celsius, uses pressure for the steam pair of 0.44-0.49 megapascal
Material room is kept the temperature, progress precompressed processing first, 18 megapascal of preload pressure position, and squeeze time is 3 minutes.
Vacuumize process is carried out after precompressed, is started to make extruding firm by ramming when vacuum degree is located at -0.06--0.01 megapascal, be made firm by ramming crowded
The time of pressure is 1 minute, and the pressure for making extruding firm by ramming is 10 megapascal.
E, green compact are cooling
Green compact are cooled down using cooling bath, the water temperature of cooling bath is 20-40 degrees Celsius, and the cooling time is according to environment
Temperature different time changes, and the cooling time of the 11-3 month is 4-4.5 hours, and the cooling time of the 4-10 month is 5-5.5 hours.
F, die mould detects
The bulk density of green compact is detected.
Embodiment 2
A kind of graphite electrode production raw material die mould method, comprising the following steps:
A, ingredient detects
Mixture is prepared according to formula, the particle purity and powder purity of raw material and mixture before and after ingredient are examined
It surveys, the requirement of particle purity is 75%-80%, and the requirement of powder purity is 67%-73%, for the particle purity detecting of raw material
Period be 8 hours/time, the detection cycle of powder purity is 4 hours/time, for the particle purity and powder purity of mixture
Detection cycle be 8 hours/time.
B, mixture is dried
Qualified mixture is placed in the heater that temperature is 160-180 degrees Celsius and is heated, 25-35 points of heating
Clock.
C, mixture is pinched mixed
Mixture after heating is put into kneading machine, pinching mixed temperature is 120-130 degrees Celsius, is pinched 15-16 minutes mixed
Afterwards, the mass ratio of addition binder, binder and mixture is 1:5, is stirred 14-15 minutes after binder is added.
The binder is pitch of the softening point at 80-90 degrees Celsius, and after binder is added, the temperature for pinching mixed thickener is mentioned
Height arrives 168-174 degrees Celsius.
D, extrusion forming
Need the thickener by 168-174 degrees Celsius to be placed in cooler before molding and be cooled to 119 degrees Celsius, cool material when
Between be 9 minutes, be placed on warm stage after cool material and kept the temperature, heat preservation after twenty minutes launches thickener.
Mixture is divided 2-4 times and is respectively launched blanking, is made firm by ramming using 35MN hydraulic press, 35MN hydraulic press mouthpiece
Temperature is 110-120 degrees Celsius, expects that the temperature of room is 100-110 degrees Celsius, uses pressure for the steam pair of 0.44-0.49 megapascal
Material room is kept the temperature, progress precompressed processing first, 19 megapascal of preload pressure position, and squeeze time is 3 minutes.
Vacuumize process is carried out after precompressed, is started to make extruding firm by ramming when vacuum degree is located at -0.06--0.01 megapascal, be made firm by ramming crowded
The time of pressure is 1.2 minutes, and the pressure for making extruding firm by ramming is 15 megapascal.
E, green compact are cooling
Green compact are cooled down using cooling bath, the water temperature of cooling bath is 20-40 degrees Celsius, and the cooling time is according to environment
Temperature different time changes, and the cooling time of the 11-3 month is 4-4.5 hours, and the cooling time of the 4-10 month is 5-5.5 hours.
F, die mould detects
The bulk density of green compact is detected.
Embodiment 3
A kind of graphite electrode production raw material die mould method, comprising the following steps:
A, ingredient detects
Mixture is prepared according to formula, the particle purity and powder purity of raw material and mixture before and after ingredient are examined
It surveys, the requirement of particle purity is 75%-80%, and the requirement of powder purity is 67%-73%, for the particle purity detecting of raw material
Period be 8 hours/time, the detection cycle of powder purity is 4 hours/time, for the particle purity and powder purity of mixture
Detection cycle be 8 hours/time.
B, mixture is dried
Qualified mixture is placed in the heater that temperature is 160-180 degrees Celsius and is heated, 25-35 points of heating
Clock.
C, mixture is pinched mixed
Mixture after heating is put into kneading machine, pinching mixed temperature is 120-130 degrees Celsius, is pinched 15-16 minutes mixed
Afterwards, the mass ratio of addition binder, binder and mixture is 1:5, is stirred 14-15 minutes after binder is added.
The binder is pitch of the softening point at 80-90 degrees Celsius, and after binder is added, the temperature for pinching mixed thickener is mentioned
Height arrives 168-174 degrees Celsius.
D, extrusion forming
Need the thickener by 168-174 degrees Celsius to be placed in cooler before molding and be cooled to 120 degrees Celsius, cool material when
Between be 11 minutes, be placed on warm stage after cool material and kept the temperature, heat preservation after twenty minutes launches thickener.
Mixture is divided 2-4 times and is respectively launched blanking, is made firm by ramming using 35MN hydraulic press, 35MN hydraulic press mouthpiece
Temperature is 110-120 degrees Celsius, expects that the temperature of room is 100-110 degrees Celsius, uses pressure for the steam pair of 0.44-0.49 megapascal
Material room is kept the temperature, progress precompressed processing first, 20 megapascal of preload pressure position, and squeeze time is 3 minutes.
Vacuumize process is carried out after precompressed, is started to make extruding firm by ramming when vacuum degree is located at -0.06--0.01 megapascal, be made firm by ramming crowded
The time of pressure is 1.5 minutes, and the pressure for making extruding firm by ramming is 18 megapascal.
E, green compact are cooling
Green compact are cooled down using cooling bath, the water temperature of cooling bath is 20-40 degrees Celsius, and the cooling time is according to environment
Temperature different time changes, and the cooling time of the 11-3 month is 4-4.5 hours, and the cooling time of the 4-10 month is 5-5.5 hours.
F, die mould detects
The bulk density of green compact is detected.
Comparative example 1
A kind of graphite electrode production raw material die mould method, comprising the following steps:
A, ingredient detects
Mixture is prepared according to formula, the particle purity and powder purity of raw material and mixture before and after ingredient are examined
It surveys, the requirement of particle purity is 75%-80%, and the requirement of powder purity is 67%-73%, for the particle purity detecting of raw material
Period be 8 hours/time, the detection cycle of powder purity is 4 hours/time, for the particle purity and powder purity of mixture
Detection cycle be 8 hours/time.
B, mixture is dried
Qualified mixture is placed in the heater that temperature is 160-180 degrees Celsius and is heated, 25-35 points of heating
Clock.
C, mixture is pinched mixed
Mixture after heating is put into kneading machine, pinching mixed temperature is 120-130 degrees Celsius, is pinched 15-16 minutes mixed
Afterwards, the mass ratio of addition binder, binder and mixture is 1:5, is stirred 14-15 minutes after binder is added.
The binder is pitch of the softening point at 80-90 degrees Celsius, and after binder is added, the temperature for pinching mixed thickener is mentioned
Height arrives 168-174 degrees Celsius.
D, extrusion forming
Need the thickener by 168-174 degrees Celsius to be placed in cooler before molding and be cooled to 100 degrees Celsius, cool material when
Between be 6 minutes, be placed on warm stage after cool material and kept the temperature, heat preservation after twenty minutes launches thickener.
Mixture is divided 2-4 times and is respectively launched blanking, is made firm by ramming using 35MN hydraulic press, 35MN hydraulic press mouthpiece
Temperature is 110-120 degrees Celsius, expects that the temperature of room is 100-110 degrees Celsius, uses pressure for the steam pair of 0.44-0.49 megapascal
Material room is kept the temperature, progress precompressed processing first, 20 megapascal of preload pressure position, and squeeze time is 3 minutes.
Vacuumize process is carried out after precompressed, is started to make extruding firm by ramming when vacuum degree is located at -0.06--0.01 megapascal, be made firm by ramming crowded
The time of pressure is 0.8 minute, and the pressure for making extruding firm by ramming is 18 megapascal.
E, green compact are cooling
Green compact are cooled down using cooling bath, the water temperature of cooling bath is 20-40 degrees Celsius, and the cooling time is according to environment
Temperature different time changes, and the cooling time of the 11-3 month is 4-4.5 hours, and the cooling time of the 4-10 month is 5-5.5 hours.
F, die mould detects
The bulk density of green compact is detected.
Comparative example 2
A kind of graphite electrode production raw material die mould method, comprising the following steps:
A, ingredient detects
The particle purity and powder purity of raw material and mixture before and after ingredient are detected, and the requirement of particle purity is
75%-80%, the requirement of powder purity are 67%-73%, and the period for the particle purity detecting of raw material is 8 hours/time, powder
The detection cycle of sub- purity is 4 hours/time, the detection cycle of particle purity and powder purity for mixture is 8 hours/
It is secondary.
B, mixture is dried
Qualified mixture is placed in the heater that temperature is 160-180 degrees Celsius and is heated, 25-35 points of heating
Clock.
C, mixture is pinched mixed
Mixture after heating is put into kneading machine, pinching mixed temperature is 120-130 degrees Celsius, is pinched 15-16 minutes mixed
Afterwards, the mass ratio of addition binder, binder and mixture is 1:5, is stirred 14-15 minutes after binder is added.
The binder is pitch of the softening point at 80-90 degrees Celsius, and after binder is added, the temperature for pinching mixed thickener is mentioned
Height arrives 168-174 degrees Celsius.
D, extrusion forming
Need the thickener by 168-174 degrees Celsius to be placed in cooler before molding and be cooled to 118 degrees Celsius, cool material when
Between be 8 minutes, be placed on warm stage after cool material and kept the temperature, heat preservation after twenty minutes launches thickener.
Mixture is divided 2-4 times and is respectively launched blanking, is made firm by ramming using 35MN hydraulic press, 35MN hydraulic press mouthpiece
Temperature is 110-120 degrees Celsius, expects that the temperature of room is 100-110 degrees Celsius, uses pressure for the steam pair of 0.44-0.49 megapascal
Material room is kept the temperature, progress precompressed processing first, 18 megapascal of preload pressure position, and squeeze time is 3 minutes.
Vacuumize process is carried out after precompressed, is started to make extruding firm by ramming when vacuum degree is located at -0.06--0.01 megapascal, be made firm by ramming crowded
The time of pressure is 1 minute, and the pressure for making extruding firm by ramming is 20 megapascal.
E, green compact are cooling
Green compact are cooled down using cooling bath, the water temperature of cooling bath is 20-40 degrees Celsius, and the cooling time is according to environment
Temperature different time changes, and the cooling time of the 11-3 month is 4-4.5 hours, and the cooling time of the 4-10 month is 5-5.5 hours.
F, die mould detects
The bulk density of green compact is detected.
The result detected to the bulk density for the product that above embodiments and comparative example are produced is as shown in the table.
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Comparative example 1 | Comparative example 2 | |
| Bulk density g/cm3 | 1.70 | 1.72 | 1.74 | 1.65 | 1.67 |
Compared according to the table data in upper table and Fig. 3 it is found that big specification can be made in the process flow in embodiment
The influence product of the temperature and time squeezed known to high power or ultra high power graphite electrode, comparative example 1 and embodiment comparison
Quality, embodiment 1 and comparative example 2 are it is found that the pressure size for making extruding firm by ramming should be less than preload pressure.
In the description of this specification, the description of reference term " one embodiment ", " example ", " specific example " etc. means
Particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one implementation of the invention
In example or example.In the present specification, schematic expression of the above terms may not refer to the same embodiment or example.
Moreover, particular features, structures, materials, or characteristics described can be in any one or more of the embodiments or examples to close
Suitable mode combines.
The basic principles, main features and advantages of the present invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.
Claims (5)
1. a kind of graphite electrode production raw material die mould method, which comprises the following steps:
A, ingredient detects
The particle purity and powder purity of raw material and mixture before and after ingredient are detected；
B, mixture is dried
Qualified mixture is placed in the heater that temperature is 160-180 degrees Celsius and is heated, is heated 25-35 minutes；
C, mixture is pinched mixed
Mixture after heating is put into kneading machine, pinch mixed temperature be 120-130 degrees Celsius, pinch it is 15-16 minutes mixed after, add
Enter binder, the mass ratio of binder and mixture is 1:5, is stirred 14-15 minutes after binder is added；
The binder is pitch of the softening point at 80-90 degrees Celsius, and after binder is added, the temperature for pinching mixed thickener is increased to
168-174 degrees Celsius；
D, extrusion forming
Need the thickener by 168-174 degrees Celsius to be placed in cooler before molding and be cooled to 118-120 degrees Celsius, cool material when
Between be 8-11 minute, be placed on warm stage after cool material and kept the temperature, keep the temperature and thickener is launched after twenty minutes；
Mixture is divided 2-4 times and is respectively launched blanking, is made firm by ramming using 35MN hydraulic press, 35MN hydraulic press mouthpiece temperature
It is 110-120 degrees Celsius, expects that the temperature of room is 100-110 degrees Celsius, progress precompressed processing first, the specification difference precompressed of product
Pressure it is different, squeeze time is 3 minutes；
Vacuumize process is carried out after precompressed, is started to make extruding firm by ramming when vacuum degree is located at -0.06--0.01 megapascal, is made extruding firm by ramming
Time is 1-1.5 minutes, and the pressure for making extruding firm by ramming is 10-26 megapascal；
E, green compact are cooling
Green compact are cooled down using cooling bath, the water temperature of cooling bath is 20-40 degrees Celsius, and the cooling time is according to environment temperature
Different time changes, and the cooling time of the 11-3 month is 4-4.5 hours, and the cooling time of the 4-10 month is 5-5.5 hours；
F, die mould detects
The bulk density of green compact is detected.
2. a kind of graphite electrode production raw material die mould method according to claim 1, which is characterized in that the ingredient inspection
The requirement for surveying particle purity is 75%-80%, and the requirement of powder purity is 67%-73%.
3. a kind of graphite electrode production raw material die mould method according to claim 1, which is characterized in that the ingredient inspection
The period for surveying particle purity detecting is 8 hours/time, and the detection cycle of powder purity is 4 hours/time, for the particle of mixture
The detection cycle of purity and powder purity is 8 hours/time.
4. a kind of graphite electrode production raw material die mould method according to claim 1, which is characterized in that the blanking is smash
Admittedly the temperature of material room uses pressure to keep the temperature for the steam of 0.44-0.49 megapascal to material room.
5. a kind of graphite electrode production raw material die mould method according to claim 1, which is characterized in that the blanking is smash
Gu when the pressure that squeezes be less than preload pressure.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112372921A (en) * | 2020-11-14 | 2021-02-19 | 许子隆 | Preparation method of ultrahigh-power graphite electrode |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112372921A (en) * | 2020-11-14 | 2021-02-19 | 许子隆 | Preparation method of ultrahigh-power graphite electrode |
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