CN106699181B - A kind of preparation method preparing pantograph carbon draw runner material using graphene oxide - Google Patents
A kind of preparation method preparing pantograph carbon draw runner material using graphene oxide Download PDFInfo
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Abstract
The invention discloses a kind of preparation methods that pantograph carbon draw runner material is prepared using graphene oxide, including as follows, graphene oxide, semi-reinforcing hydrocarbon black, graphite powder and the pitch coke by being crushed, being milled, sieving are mixed, the aggregate of the carbon draw runner described as preparation；Binder will be added in the aggregate, then passes through kneading, obtain thickener；Thickener is subjected to pre-molding；The thickener of pre-molding is roasted, finally obtains the material suitable for the pantograph carbon draw runner, the present invention only needs once to roast the charcoal strip material that can be met the requirements, with short production cycle.The pantograph carbon draw runner of graphene oxide preparation provided by the invention has the advantages that good electric conductivity, thermal conductivity are high and rub resistance and abrasiveness are strong, cost of material is low etc..
Description
Technical field
The invention belongs to electric locomotive technical fields more particularly to a kind of utilization graphene oxide to prepare pantograph carbon draw runner
The preparation method of material.
Background technique
With the development of science and technology, rail traffic plays more and more important role in national economy.In state, China
Today that people's economic level is rapidly sent out, rail traffic industry especially high-speed rail, motor-car and passenger-cargo electric locomotive etc. show vigorously
The situation of development.
And as the most important collection electric original copy pantograph of its power resources for, the even more most important thing.Due to bullet train
It is to obtain electric energy from road network conducting wire by the carbon slipper in pantograph, drives traction electric machine operation to drive train driving, by
It is the essential condition for guaranteeing current collection at high speed that pantograph carbon slipper is reliably contacted with road network conducting wire, the carbon slipper on pantograph collector head with
Road network conductive contact, it is opposite to slide, electric current to be removed from road network conducting wire, is conveyed to electric locomotive, this process is known as being flowed,
During being flowed, road network conducting wire and pantograph carbon slide it is mechanical with it is electrically closely related, as long as one of them goes wrong,
It will destroy normally by electrical characteristics.Pantograph carbon draw runner plate and road network conducting wire are once accident occurs, it will bring extremely serious
Consequence, heavy economic losses is directly contributed, for this purpose, the preparation of pantograph carbon slide undoubtedly becomes most critical, to guarantee railway
This eternal theme of transportation safety.Due to constantly generating friction and impact with contact line conducting wire in operation, so this portion
Part is a kind of expendable parts often replaced.
Carbon slipper has been developed in recent years, the high mechanical strength of commonly used carbon slipper on American-European bullet train,
The running kilometre number of each slide plate reaches 120,000 kms in German ICE operation.Currently, carbon slipper is still that domestic and international railway department is wide
The preferred material of general use, carbon slipper are that have good conduction with carbon-graphite for basic material.Thermally conductive and wear-resistant self-lubricating
Property, and have the characteristics that inhibit spark effect and high temperature indeformable, small to contact net lead abrasion well, as carbon slipper
The selection of key components carbon draw runner must have strict requirements index to its comprehensive performance, and it is necessary to have suitable resistivity
With contact resistance, enough mechanical strengths, good anti-attrition and self-lubrication, good heat-resisting, resistance to electric arc and centainly resistance to
Mill property.
Application No. is 201310582451.6 Chinese patent, a kind of pantograph carbon slide and its manufacturing method are disclosed,
Pantograph carbon slide is by petroleum coke powder, pitch coke powder, spray carbon black, sulphur, boron nitride, carbon fiber, natural graphite, artificial stone
Ink, calcium chloride powder, restructuring pitch are stirred for raw material and are made, and then carry out kneading, carbon is made using the kneading material
The first base of slide plate, is being roasted, and sintering carbon slipper just base is made, and base at the beginning of sintering carbon slipper is successively impregnated, roasted, dry
It handles, the production cycle of carbon slipper is long in this patent, and needing to carry out double roasting can be only achieved expected effect.
In addition diversification high-endization of raw material, such as carbon fiber, natural graphite material necessarily increase its manufacturing cost.By
It can satisfy pantograph carbon draw runner manufacturing technique requirent in high-end graphite product, but its price is very expensive, and domestic height
Performance graphite products are still in developing stage, and normal carbon material cannot fully meet carbon draw runner physical and chemical index,
For these reasons, the present invention is specifically proposed.
Summary of the invention
The object of the present invention is to provide a kind of preparation method for preparing pantograph carbon draw runner material using graphene oxide,
Graphene oxide is product of the powdered graphite after chemical oxidation and removing, and graphene oxide is single atomic layer, can be with
Expand to some tens of pm on lateral dimension at any time, therefore, the typical size of construct trans general chemistry and material science.
Graphene oxide can be considered a kind of flexible material of non-traditional kenel, with polymer, colloid, film and amphiphatic molecule
Characteristic.It is a kind of novel carbon product that the preparation method, which is using graphene oxide production pantograph carbon draw runner material, is had non-
Often good physical and chemical index is significantly improved the electric conductivity of pantograph carbon slide material, is led due to the addition of graphene oxide
Hot and friction, abrasiveness, preparation method of the present invention is with short production cycle, by once roasting the charcoal web met the requirements to obtain the final product
Material.
To achieve the above object, the present invention adopts the following technical scheme:
A kind of preparation method being prepared pantograph carbon draw runner material using graphene oxide, is included the following steps:
(1) graphene oxide, semi-reinforcing hydrocarbon black, graphite powder and the pitch coke by being crushed, being milled, sieving are mixed
It closes, the aggregate of the carbon draw runner described as preparation；
(2) binder is added in the aggregate of Xiang Suoshu, then passes through kneading, obtains thickener；
(3) thickener is subjected to pre-molding；
(4) thickener of pre-molding is once roasted, obtains being suitable for the pantograph carbon draw runner material.
By above method, the pantograph carbon draw runner of graphene oxide preparation have good electric conductivity, thermal conductivity high and
The advantages such as rub resistance and abrasiveness are strong, cost of material is low.
Preferably, by weight percentage, graphene oxide 3-5%, half mends each component of aggregate described in step (1)
Strong carbon black 10-15%, graphite powder 6-8%, pitch coke 70-80%, the partial size 0.15mm-2mm of the pitch coke are described
The partial size of aggregate is 0.15mm-2mm.
By above proportion, the partial size of the aggregate is the direct shadow of distribution because of grain diameter within this range
The accumulation mode of particle is rung, particle packing is closer, and the bulk density of carbon draw runner material is bigger, mechanical strength is higher.
Preferably, the partial size of the semi-reinforcing hydrocarbon black is 0.07mm-0.10mm；The graphite powder partial size is 0.5-
1mm；
The particle size range and content of the pitch coke are as follows:
0.5mm < partial size≤2mm 55-60%
Partial size≤0.15mm 40-45%.
The particles of aggregates accumulation of different-grain diameter is more close, and the bulk density of carbon draw runner material, the porosity, anti-folding and anti-pressing are strong
Degree and thermal expansion coefficient can reach an extraordinary equilibrium valve, and prepared carbon draw runner material volume density is big, the porosity
It is small, anti-folding and anti-pressing ability is strong, thermal expansion coefficient is small.
Wherein, in the preparation process of carbon draw runner material, formula is affected to the performance parameter of material, especially to body
The influence of product density, resistivity, the porosity, mechanical strength.In general, product is mentioned using relatively fine particle formula extrusion forming
Bulk density it is big, the porosity is smaller, bending and compressive strength is high, the present invention is in ingredient, using the graphite oxide of hyperfine structure
Alkene and semi-reinforcing hydrocarbon black, then pitch coke is crushed, is milled, sieves, reach little particle formula, maximum particle diameter 2mm,
Minimum grain size is 0.15mm.In this particle size range, the distribution of grain diameter directly affects the accumulation mode of particle, particle packing
Closer, the bulk density of carbon draw runner material is bigger, mechanical strength is higher.
Preferably, aggregate described in step (2) and the weight of binder ratio are 74-71.5:26-28.5, preferably
For 74:26.
The extrusion forming mode that the present invention uses, therefore there is stringent proportion to want the dosage of binder medium temperature restructuring coal tar pitch
It asks, the dosage of binder and the surface area of aggregate have direct relation, and the partial size of aggregate is small, and surface area is bigger, and consumption of binder is then
More, but consumption of binder is excessive, when molding, is not easy compacted, thus the bulk density of product is smaller, and product is easy after forming
Deformation.Aggregate of the present invention and binder proportion are 74:26, and after kneading, obtained thickener is not substantially in for aggregate and binder
Agglomerate, or have a little agglomerate, the higher molded product of bulk density is obtained after molding.
Preferably, stretch modulus≤1.01TPa of graphene oxide described in step (1), ultimate strength≤116Gpa,
The resistivity of the semi-reinforcing hydrocarbon black≤0.6 μ Ω m, real density >=2.10g/cm of the pitch coke3, ash <
0.5%, volatile matter < 0.8%.
Preferably, binder described in step (2) is medium temperature coal pitch, the softening point 85- of the medium temperature coal pitch
90 DEG C, coking value >=58%.
The present invention is conducive to obtain the higher roasting product of bulk density using conditions above, is conducive to improve yield rate, most
Its physical and chemical index is set to meet the needs of pantograph carbon draw runner eventually.
Preferably, kneading described in step (2) is dry-mixed and wet mixing, it is described it is dry-mixed be by the aggregate according to the ratio
It puts into kneading pot, stirring rate 45r/min, stirs 30-40min, dry-mixed temperature is 160-180 DEG C；The wet mixing is
Medium temperature coal pitch is first heated to 220 DEG C, is then injected into kneading pot by pitch pipeline and is stirred with aggregate, by
This obtains thickener.
Preferably, pre-molding described in step (3) is that the thickener is pressed into preforming cylindrical body, precompressed
180 DEG C of temperature.
Preferably, the preforming cylindrical body is subjected to extrusion forming and obtains green article, the green article
Bulk density >=1.75g/cm3。
It is furthermore preferred that the described primary roasting be by the green article in the absence of air conditions, in nitrogen electricity
It is heat-treated in furnace, the heat treatment process is divided into following steps:
(1) green article is warming up to 550 DEG C of temperature from 150 DEG C with 1.1-2.1 DEG C/h of heating rate；
(2) 900 DEG C then are warming up to from 550 DEG C with 0.7-1.1 DEG C/h of heating rate；
(3) 1400 DEG C finally are warming up to from 900 DEG C with 1.1-1.5 DEG C/h of heating rate.
The purpose of roasting is to carbonize binder pitch, coke grid is formed between particles of aggregates, by varigrained bone
Material is bonded to an entirety securely.Little particle formula is cracked in follow-up heat treatment process when preparing Carbon Materials
Probability can be big, and yield rate may be relatively low, heating curve, the duration of heat of the present invention by optimization and when improving roasting etc. because
Element improves the coking rate of binder, overcomes the problem that little particle bring is cracked, yield rate is low, to guarantee product
The yield rate of overall target.
Roasting process of the present invention is carried out under conditions of completely cutting off air and oxygen using nitrogen electric furnace, and maximum temperature reaches
It to 1400 DEG C, heats up per hour 1.1-2.1 DEG C at 150-550 DEG C of heating zone, the lightweight fugitive constituent in roasting product is with slower
Speed volatilization is discharged, and the suffered pressure inside roasting product is smaller, more balances, and avoids crackle in temperature-rise period and generates,
And light components have sufficient time discharge product；At 550-900 DEG C, polycondensation reaction enhances in roasting product, and coke starts shape
At 0.7-1.1 DEG C of heating per hour is conducive to the coking rate for improving binder, and carbonization at low temperature is changed into coking；At 900-1400 DEG C
When, polycondensation reaction continues to occur, the further coking of product, heats up 1.1-1.5 DEG C per hour；It is risen with slower heating rate
Temperature is conducive to the bulk density and intensity that improve roasting product, and avoids roasting product generation when shrinking during polycondensation reaction
Crackle；And heated up with very fast heating rate, the institutional framework of roasting product further densifies, obtain it is final be suitable for by
Pantograph carbon draw runner material.
Heat treatment process uses temperature alarming instrument control system, guarantees the poor range of temperature alarming instrument within 5 DEG C, it is ensured that product
Bulk density is greater than 1.75g/cm3, product external and internal compositions require no crackle, to obtain meeting the material of pantograph carbon draw runner requirement
Material.
Compared with prior art, the present invention have it is following the utility model has the advantages that
1, the present invention is conducive to the pantograph carbon draw runner of graphene oxide preparation, it is only necessary to which primary roasting can be obtained meeting and be wanted
The charcoal strip material asked, it is with short production cycle.
2, the pantograph carbon draw runner of graphene oxide provided by the invention preparation have good electric conductivity, thermal conductivity high and
The advantages such as rub resistance and abrasiveness are strong, cost of material is low, the present invention in graphene oxide produce pantograph carbon draw runner material,
Bulk density >=1.75g/cm3, resistivity is≤40 μ Ω m, and compression strength is >=90Mpa, and flexural strength is >=35Mpa, Xiao
Family name's hardness is >=60HS, ten thousand km of wear-resisting property≤15mm/, to abrasion≤0.015mm of conducting wire2/ ten thousand shelves.
Specific embodiment
Embodiment in following embodiment can be further combined or replace, and embodiment is only to of the invention
Preferred embodiment is described, and it is not intended to limit the concept and scope of the present invention, is not departing from design philosophy of the present invention
Under the premise of, the various changes and modifications that professional and technical personnel in the art make technical solution of the present invention belong to this hair
Bright protection scope
Embodiment 1
(1) aggregate of pantograph carbon draw runner is prepared according to weight percent preparation are as follows: graphene oxide 3%, half reinforcement charcoal
Black 10%, graphite powder 6%, pitch coke 71%.
The weight ratio of aggregate and medium temperature coal pitch is 74:26, and medium temperature coal pitch softening point is 85 DEG C, coking value 58%,
Wherein the stretch modulus of graphene oxide is 1.01TPa, and ultimate strength 116Gpa, semi-reinforcing hydrocarbon black partial size is 0.07mm, resistance
Rate 0.6 μ Ω m, the real density 2.10g/cm of pitch coke3, ash content 0.45%, volatile matter 0.75%, graphite powder partial size is
0.5mm, wherein pitch coke is crushed, be milled, is sieved, pitch coke partial size is 0.5mm < partial size≤total pitch coke of 2mm Zhan
Weight percent 55%, partial size≤0.15mm Zhan total pitch coke weight percent 45%, the aggregate size of preparation is
0.15mm-2mm。
(2) ready aggregate above is put into kneading pot, stirring rate 45r/min, stirs 30min, temperature is
160 DEG C, medium temperature coal pitch above is then heated to 220 DEG C, is then injected into kneading pot and aggregate by pitch pipeline
It is sufficiently stirred, thus obtains thickener.
(3) obtained thickener is pressed into cylindrical body at 180 DEG C, carries out the plasticity of next step, by preforming cylinder
Body is squeezed, and green article is obtained.
(4) green article above is put into nitrogen electric furnace, is heat-treated in the absence of air conditions, be first
550 DEG C of temperature are warming up to from 150 DEG C with 1.1 DEG C/h of heating rate；Then 900 are warming up to from 550 DEG C with 0.7 DEG C/h of heating rate
℃；1400 DEG C finally are warming up to from 900 DEG C with 1.1 DEG C/h of heating rate, obtains the pantograph carbon draw runner requirement for meeting condition
Material.
It is controlled in temperature-rise period above using temperature alarming instrument, guarantees the error range of temperature alarming instrument at 5 DEG C
Within, product external and internal compositions do not have crackle.
Carbon draw runner obtained above is tested for the property, test result is shown in Table 1.
Embodiment 2
(1) aggregate of pantograph carbon draw runner is prepared according to weight percent preparation are as follows: graphene oxide 3%, half reinforcement charcoal
Black 10%, graphite powder 7%, pitch coke 80%.
The weight ratio of aggregate and medium temperature coal pitch is 73:27, and medium temperature coal pitch softening point is 87 DEG C, coking value 58%,
Wherein the stretch modulus of graphene oxide is 1.01TPa, and ultimate strength 116Gpa, semi-reinforcing hydrocarbon black partial size is 0.08mm, resistance
Rate 0.4 μ Ω m, the real density 2.50g/cm of pitch coke3, ash content 0.45%, volatile matter 0.75%, graphite powder partial size is
0.5mm, wherein pitch coke is crushed, be milled, is sieved, pitch coke partial size is 0.5mm < partial size≤total pitch coke of 2mm Zhan
Weight percent 57%, partial size≤0.15mm Zhan total pitch coke weight percent 43%, the aggregate size of preparation is
0.15mm-2mm。
(2) ready aggregate above is put into kneading pot, stirring rate 45r/min, stirs 35min, temperature is
170 DEG C, medium temperature coal pitch above is then heated to 220 DEG C, is then injected into kneading pot and aggregate by pitch pipeline
It is sufficiently stirred, thus obtains thickener.
(3) obtained thickener is pressed into cylindrical body at 180 DEG C, carries out the plasticity of next step, by preforming cylinder
Body is squeezed, and green article is obtained.
(4) green article above is put into nitrogen electric furnace, is heat-treated in the absence of air conditions, be first
550 DEG C of temperature are warming up to from 150 DEG C with 1.5 DEG C/h of heating rate；Then 900 are warming up to from 550 DEG C with 0.9 DEG C/h of heating rate
℃；1400 DEG C finally are warming up to from 900 DEG C with 1.3 DEG C/h of heating rate, obtains the pantograph carbon draw runner requirement for meeting condition
Material.
It is controlled in temperature-rise period above using temperature alarming instrument, guarantees the error range of temperature alarming instrument at 5 DEG C
Within, product external and internal compositions do not have crackle.
Carbon draw runner obtained above is tested for the property, test result is shown in Table 1.
Embodiment 3
(1) aggregate of pantograph carbon draw runner is prepared according to weight percent preparation are as follows: graphene oxide 4%, half reinforcement charcoal
Black 12%, graphite powder 7%, pitch coke 77%.
The weight ratio of aggregate and medium temperature coal pitch is 72:28, and medium temperature coal pitch softening point is 88 DEG C, coking value 60%,
Wherein the stretch modulus of graphene oxide is 1.01TPa, and ultimate strength 116Gpa, semi-reinforcing hydrocarbon black partial size is 0.09mm, resistance
Rate 0.4 μ Ω m, the real density 2.50g/cm of pitch coke3, ash content 0.45%, volatile matter 0.75%, graphite powder partial size is
0.9mm, wherein pitch coke is crushed, be milled, is sieved, pitch coke partial size is 0.5mm < partial size≤total pitch coke of 2mm Zhan
Weight percent 58%, partial size≤0.15mm Zhan total pitch coke weight percent 42%, the aggregate size of preparation is
0.15mm-2mm。
(2) ready aggregate above is put into kneading pot, stirring rate 45r/min, stirs 38min, temperature is
175 DEG C, medium temperature coal pitch above is then heated to 220 DEG C, is then injected into kneading pot and aggregate by pitch pipeline
It is sufficiently stirred, thus obtains thickener.
(3) obtained thickener is pressed into cylindrical body at 180 DEG C, carries out the plasticity of next step, by preforming cylinder
Body is squeezed, and green article is obtained.
(4) green article above is put into nitrogen electric furnace, is heat-treated in the absence of air conditions, be first
550 DEG C of temperature are warming up to from 150 DEG C with 1.3 DEG C/h of heating rate；Then 900 are warming up to from 550 DEG C with 1.0 DEG C/h of heating rate
℃；1400 DEG C finally are warming up to from 900 DEG C with 1.2 DEG C/h of heating rate, obtains the pantograph carbon draw runner requirement for meeting condition
Material.
It is controlled in temperature-rise period above using temperature alarming instrument, guarantees the error range of temperature alarming instrument at 5 DEG C
Within, product external and internal compositions do not have crackle.
Carbon draw runner obtained above is tested for the property, test result is shown in Table 1.
Embodiment 4
(1) aggregate of pantograph carbon draw runner is prepared according to weight percent preparation are as follows: graphene oxide 5%, half reinforcement charcoal
Black 15%, graphite powder 8%, pitch coke 72%.
The weight ratio of aggregate and medium temperature coal pitch is 71.5:28.5, and medium temperature coal pitch softening point is 90 DEG C, and coking value is
65%, wherein the stretch modulus of graphene oxide is 1.01TPa, ultimate strength 116Gpa, and semi-reinforcing hydrocarbon black partial size is
0.09mm, resistivity 0.4 μ Ω m, the real density 2.50g/cm of pitch coke3, ash content 0.45%, volatile matter 0.75%, graphite powder
Partial size is 0.9mm, wherein is crushed pitch coke, is milled, sieves, pitch coke partial size is that 0.5mm < partial size≤2mm Zhan is total
The weight percent 58% of pitch coke, partial size≤0.15mm Zhan total pitch coke weight percent 42%, the aggregate size of preparation
For 0.15mm-2mm.
(2) ready aggregate above is put into kneading pot, stirring rate 45r/min, stirs 38min, temperature is
175 DEG C, medium temperature coal pitch above is then heated to 220 DEG C, is then injected into kneading pot and aggregate by pitch pipeline
It is sufficiently stirred, thus obtains thickener.
(3) obtained thickener is pressed into cylindrical body at 180 DEG C, carries out the plasticity of next step, by preforming cylinder
Body is squeezed, and green article is obtained.
(4) green article above is put into nitrogen electric furnace, is heat-treated in the absence of air conditions, be first
550 DEG C of temperature are warming up to from 150 DEG C with 1.3 DEG C/h of heating rate；Then 900 are warming up to from 550 DEG C with 1.0 DEG C/h of heating rate
℃；1400 DEG C finally are warming up to from 900 DEG C with 1.2 DEG C/h of heating rate, obtains the pantograph carbon draw runner requirement for meeting condition
Material.
It is controlled in temperature-rise period above using temperature alarming instrument, guarantees the error range of temperature alarming instrument at 5 DEG C
Within, product external and internal compositions do not have crackle.
Carbon draw runner obtained above is tested for the property, test result is shown in Table 1.
Embodiment 5
(1) aggregate of pantograph carbon draw runner is prepared according to weight percent preparation are as follows: graphene oxide 3%, half reinforcement charcoal
Black 10%, graphite powder 6%, pitch coke 71%.
The weight ratio of aggregate and medium temperature coal pitch is 74:26, and medium temperature coal pitch softening point is 85 DEG C, coking value 58%,
Wherein the stretch modulus of graphene oxide is 1.01TPa, and ultimate strength 116Gpa, semi-reinforcing hydrocarbon black partial size is 0.07mm, resistance
Rate 0.6 μ Ω m, the real density 2.10g/cm of pitch coke3, ash content 0.45%, volatile matter 0.75%, graphite powder partial size is
0.5mm, wherein pitch coke is crushed, be milled, is sieved, pitch coke partial size is 0.5mm < partial size≤total pitch coke of 2mm Zhan
Weight percent 55%, partial size≤0.15mm Zhan total pitch coke weight percent 45%, the aggregate size of preparation is
0.15mm-2mm。
(2) ready aggregate above is put into kneading pot, stirring rate 45r/min, stirs 30min, temperature is
160 DEG C, medium temperature coal pitch above is then heated to 220 DEG C, is then injected into kneading pot and aggregate by pitch pipeline
It is sufficiently stirred, thus obtains thickener.
(3) obtained thickener is pressed into cylindrical body at 180 DEG C, carries out the plasticity of next step, by preforming cylinder
Body is squeezed, and green article is obtained.
(4) green article above is put into nitrogen electric furnace, is heat-treated in the absence of air conditions, be first
550 DEG C of temperature are warming up to from 150 DEG C with 2.1 DEG C/h of heating rate；Then 900 are warming up to from 550 DEG C with 1.1 DEG C/h of heating rate
℃；1400 DEG C finally are warming up to from 900 DEG C with 1.5 DEG C/h of heating rate, obtains the pantograph carbon draw runner requirement for meeting condition
Material.
It is controlled in temperature-rise period above using temperature alarming instrument, guarantees the error range of temperature alarming instrument at 5 DEG C
Within, product external and internal compositions do not have crackle.
Carbon draw runner obtained above is tested for the property, test result is shown in Table 1.
Embodiment 6
(1) aggregate of pantograph carbon draw runner is prepared according to weight percent preparation are as follows: graphene oxide 3%, half reinforcement charcoal
Black 10%, graphite powder 7%, pitch coke 80%.
The weight ratio of aggregate and medium temperature coal pitch is 73:27, and medium temperature coal pitch softening point is 87 DEG C, coking value 58%,
Wherein the stretch modulus of graphene oxide is 1.01TPa, and ultimate strength 116Gpa, semi-reinforcing hydrocarbon black partial size is 0.08mm, resistance
Rate 0.4 μ Ω m, the real density 2.50g/cm of pitch coke3, ash content 0.45%, volatile matter 0.75%, graphite powder partial size is
0.5mm, wherein pitch coke is crushed, be milled, is sieved, pitch coke partial size is 0.5mm < partial size≤total pitch coke of 2mm Zhan
Weight percent 57%, partial size≤0.15mm Zhan total pitch coke weight percent 43%, the aggregate size of preparation is
0.15mm-2mm。
(2) ready aggregate above is put into kneading pot, stirring rate 45r/min, stirs 35min, temperature is
170 DEG C, medium temperature coal pitch above is then heated to 220 DEG C, is then injected into kneading pot and aggregate by pitch pipeline
It is sufficiently stirred, thus obtains thickener.
(3) obtained thickener is pressed into cylindrical body at 180 DEG C, carries out the plasticity of next step, by preforming cylinder
Body is squeezed, and green article is obtained.
(4) green article above is put into nitrogen electric furnace, is heat-treated in the absence of air conditions, be first
550 DEG C of temperature are warming up to from 150 DEG C with 2.0 DEG C/h of heating rate；Then 900 are warming up to from 550 DEG C with 1.0 DEG C/h of heating rate
℃；1400 DEG C finally are warming up to from 900 DEG C with 1.4 DEG C/h of heating rate, obtains the pantograph carbon draw runner requirement for meeting condition
Material.
It is controlled in temperature-rise period above using temperature alarming instrument, guarantees the error range of temperature alarming instrument at 5 DEG C
Within, product external and internal compositions do not have crackle.
Carbon draw runner obtained above is tested for the property, test result is shown in Table 1.
1 carbon draw runner the performance test results of table
As can be seen from Table 1, using the conducting electricity very well of pantograph carbon draw runner of graphene oxide preparation, mechanical strength
Height, shock resistance is good, wear-resistant.
Test example
The test example has investigated assistant ingredients to the property of pantograph carbon draw runner obtained in preparation method under the same conditions
The influence of energy parameter.
Reference substance 1: graphene oxide is changed into natural graphite in aggregate and prepares pantograph carbon draw runner, preparation method is the same as implementation
Example 1；The performance test results are shown in Table 2.
Reference substance 2: semi-reinforcing hydrocarbon black is not added in aggregate and prepares pantograph carbon draw runner, the preparation method is the same as that of Example 1；Performance is surveyed
Test result is shown in Table 2.
Reference substance 3: the particle size range of semi-reinforcing hydrocarbon black in aggregate are as follows: 0.1mm≤partial size≤0.15mm, preparation method is the same as real
Apply example 1；The performance test results are shown in Table 2.
The performance test results of table 2, each reference substance
。
Claims (10)
1. a kind of preparation method for preparing pantograph carbon draw runner material using graphene oxide, which is characterized in that including walking as follows
It is rapid:
It (1) is the semi-reinforcing hydrocarbon black of 0.07mm-0.10mm, graphite powder and by broken, milling, sieve by graphene oxide, partial size
The pitch coke divided is mixed, the aggregate of the carbon draw runner described as preparation；
(2) binder is added in the aggregate of Xiang Suoshu, then passes through kneading, obtains thickener；
(3) thickener is subjected to pre-molding；
(4) thickener of pre-molding is once roasted, obtains being suitable for the pantograph carbon draw runner material；Described one
It is secondary roasting be by green article in the absence of air conditions, be heat-treated in nitrogen electric furnace, the heat treatment process
It is divided into following steps:
Green article is warming up to 550 DEG C of temperature from 150 DEG C with 1.1-2.1 DEG C/h of heating rate；
Then 900 DEG C are warming up to from 550 DEG C with 0.7-1.1 DEG C/h of heating rate；
Finally 1400 DEG C are warming up to from 900 DEG C with 1.1-1.5 DEG C/h of heating rate.
2. a kind of preparation method that pantograph carbon draw runner material is prepared using graphene oxide according to claim 1,
Be characterized in that, each component of aggregate as described in step (1) by weight percentage, graphene oxide 3-5%, semi-reinforcing hydrocarbon black
10-15%, graphite powder 6-8%, pitch coke 70-80%, the graphene oxide, semi-reinforcing hydrocarbon black, the weight of graphite powder and pitch coke
Percentage summation is 100%, the partial size 0.15mm-2mm of the aggregate.
3. a kind of preparation method for preparing pantograph carbon draw runner material using graphene oxide according to claim 1, special
Sign is that graphite powder partial size as described in step (1) is 0.5-1mm；
The particle size range and content of the pitch coke are as follows:
0.5mm < partial size≤2mm 55-60%
Partial size≤0.15mm 40-45%.
4. a kind of preparation method that pantograph carbon draw runner material is prepared using graphene oxide according to claim 1,
It is characterized in that, aggregate described in step (2) and the weight of binder ratio are 74-71.5:26-28.5.
5. a kind of preparation method that pantograph carbon draw runner material is prepared using graphene oxide according to claim 4,
It is characterized in that, aggregate described in step (2) and the weight of binder ratio are 74:26.
6. a kind of preparation method that pantograph carbon draw runner material is prepared using graphene oxide according to claim 1,
It is characterized in that, stretch modulus≤1.01TPa of graphene oxide described in step (1), ultimate strength≤116Gpa, described half
The resistivity of hard carbon black≤0.6 μ Ω m, real density >=2.10g/cm of the pitch coke3, ash < 0.5%, volatile matter
< 0.8%.
7. a kind of preparation method that pantograph carbon draw runner material is prepared using graphene oxide according to claim 1,
It is characterized in that, binder described in step (2) is medium temperature coal pitch, 85-90 DEG C of the softening point of the medium temperature coal pitch, knot
Coke number >=58%.
8. a kind of preparation method that pantograph carbon draw runner material is prepared using graphene oxide according to claim 1,
Be characterized in that, kneading described in step (2) is dry-mixed and wet mixing, it is described it is dry-mixed be the aggregate is put into according to the ratio it is mixed
It pinches in pot, stirring rate 45r/min, stirs 30-40min, dry-mixed temperature is 160-180 DEG C；The wet mixing is by medium temperature
Coal tar pitch is first heated to 220 DEG C, is then injected into kneading pot by pitch pipeline and is stirred with aggregate, thus obtained
Thickener.
9. a kind of preparation for preparing pantograph carbon draw runner material using graphene oxide according to claim 1-7
Method, which is characterized in that pre-molding described in step (3) is that the thickener is pressed into preforming cylindrical body, in advance
180 DEG C of temperature of pressure.
10. a kind of preparation method that pantograph carbon draw runner material is prepared using graphene oxide according to claim 9,
It is characterized in that, the described preforming cylindrical body is subjected to extrusion forming and obtains green article, green article bulk density >=
1.75g/cm3。
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| CN108101540B (en) * | 2017-12-21 | 2021-01-22 | 安徽锦美碳材科技发展有限公司 | Preparation method of pantograph carbon slide plate for electric locomotive |
| CN108117391B (en) * | 2018-01-17 | 2020-11-17 | 四川理工学院 | Preparation method of electric locomotive pantograph composite sliding plate |
| CN108503363A (en) * | 2018-03-26 | 2018-09-07 | 大同新成新材料股份有限公司 | A kind of pantograph carbon slide of carbon-carbon composite and preparation method thereof |
| CN108515189B (en) * | 2018-04-02 | 2021-05-04 | 大同新成新材料股份有限公司 | Preparation method of graphene-copper composite material |
| CN113929462B (en) * | 2021-10-16 | 2022-08-09 | 上杭鑫昌龙实业有限公司 | Optical fiber annealing pipe and preparation process thereof |
| CN114956847B (en) * | 2022-05-09 | 2023-06-27 | 合肥工业大学 | Preparation method of needle coke enhanced pure carbon pantograph carbon slide plate |
| CN115959908B (en) * | 2022-12-07 | 2023-08-22 | 西南交通大学 | Method and device for uniformly growing graphene in carbon sliding block |
| CN116178017A (en) * | 2023-01-31 | 2023-05-30 | 安徽锦美碳材科技发展有限公司 | Preparation method of directly sintered carbon strip for pantograph carbon slide plate |
| CN116425545A (en) * | 2023-03-20 | 2023-07-14 | 国家高速列车青岛技术创新中心 | Carbon sliding plate material without binder and preparation method thereof |
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