CN106744919A - A kind of production technology of polycrystalline silicon base plate special graphite - Google Patents

A kind of production technology of polycrystalline silicon base plate special graphite Download PDF

Info

Publication number
CN106744919A
CN106744919A CN201710031000.1A CN201710031000A CN106744919A CN 106744919 A CN106744919 A CN 106744919A CN 201710031000 A CN201710031000 A CN 201710031000A CN 106744919 A CN106744919 A CN 106744919A
Authority
CN
China
Prior art keywords
hours
temperature
mixture
pitch
production technology
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710031000.1A
Other languages
Chinese (zh)
Inventor
赵俊
赵俊一
乔学锋
高顺宾
赵俊通
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Han Junpei
Original Assignee
Han Junpei
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Han Junpei filed Critical Han Junpei
Priority to CN201710031000.1A priority Critical patent/CN106744919A/en
Publication of CN106744919A publication Critical patent/CN106744919A/en
Pending legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00Physical properties of inorganic compounds
    • C01P2006/80Compositional purity

Abstract

The present invention relates to a kind of production technology of polycrystalline silicon base plate special graphite, described production technology includes preparing raw material, mixed dehydration, pitch preparation, premix, rolled sheet, grinding, once pressing mold shaping, roasting, single-steeping, after baking, double-steeping, three roastings, three dippings, graphited steps, and the special graphite prepared by this kind of technique has the advantages that to lower the labour intensity of workman, improves product service life, reduces production cost.

Description

A kind of production technology of polycrystalline silicon base plate special graphite
Technical field
The invention belongs to technical field of polysilicon production, more particularly to a kind of production work of polycrystalline silicon base plate special graphite Skill.
Background technology
With industrial expansion, increasingly extensively, the field for setting foot in constantly expands the purposes of high purity graphite, for different Industry characteristic, production sets extremely urgent with the graphite of single-minded purposes;For the client of downstream, them can be not only reduced Production cost, improve the service life of product, and the labour intensity of workman can be reduced, reduce staff more Frequency is changed, the demand with polysilicon increasingly increases, it is necessary to which exploitation one kind is specifically designed for polycrystalline silicon base plate special graphite.
The content of the invention
The invention aims to overcome the deficiencies in the prior art, and provide a kind of strong with the work for lowering workman Degree, raising product service life, the production technology of the polycrystalline silicon base plate special graphite of reduction production cost.
What the technical solution adopted by the present invention was realized in:A kind of production technology of polycrystalline silicon base plate special graphite, institute The production technology stated comprises the following steps:
Step 1:Preparing raw material:Pitch coke, petroleum coke are crushed respectively by 5R pendulum type ring roll pulverizers, pitch coke, petroleum coke Raw material particle size tails over 5%-10% by 325 mesh sieves;
Step 2:Mixed dehydration:Pitch coke, the petroleum coke particles that will be obtained in step 1 are 3 according to mass ratio:7 are added to stirring Machine is well mixed, and then heats the mixture to 120-125 DEG C, and holding carries out thermal dehydration in 40 minutes;
Step 3:It is prepared by pitch:Stood by infusion from modified coal tar pitch and be not less than 100 hours, and by temperature control in 160- Pitch is prepared at 165 DEG C;
Step 4:Premix:The compound that the pitch and step 2 prepared in optional step 3 are obtained, described compound and pitch Mass ratio is 40%-41%, and compound and pitch such as to mixing in mixing plant will be controlled into mixing temperature at 173-178 DEG C, Incorporation time is 60min;
Step 5:Rolled sheet:The mixture prepared in step 4 is put into plastics processing mill, flakiness is rolled by plastics processing mill, The thickness of described thin slice is 2-2.5mm, will roll thin slice and is deposited 48 hours in the case of 50-60 DEG C of temperature;
Step 6:Grinding:Thin slice prepared by step 5 is put into 5R pendulum type ring roll pulverizers powder is obtained, and powder is passed through 200 mesh Sieve, tails over no more than 20%-25%;
Step 7:Pressing mold is molded:The powder prepared in step 6 is encased in mould, the pressing mold density for making reaches 1.45- 1.46g/cm3, and place indoors no less than 48 hours;
Step 8:Once it is calcined:Mixture shove charge compressing in step 7 is calcined so that in-furnace temperature is rapidly achieved 350 DEG C, 5 DEG C for every eight hours of uniform intensification is then changed to, it is warming up to 520 DEG C and is kept for 24 hours, uniform intensification again rises for 27 DEG C for every eight hours Temperature maintains close fire within 48 hours to 1250 DEG C in 1250 DEG C of stages of high temperature, and the mixture after roasting then is cooled down into 240 hours and stove Interior temperature is come out of the stove when being less than 90 DEG C;
Step 9:Single-steeping:The impregnation mixture after being once calcined will be completed in medium temperature coal pitch, and with 50 DEG C -60 DEG C The temperature rise speed of/h is heated to 300-500 degree, vacuumizes rear pressurize treatment, and single-steeping rate of body weight gain reaches 18-19%;
Step 10:After baking:By mixture shove charge after baking so that in-furnace temperature is rapidly achieved 350 DEG C, then it is changed to 5 DEG C for every eight hours of even intensification, is warming up to 520 DEG C and is kept for 24 hours, and uniform intensification again is warming up to 1250 DEG C for 27 DEG C for every eight hours, 1250 DEG C of stages of high temperature maintain 48 hours to close fire, then cool down the mixture after roasting 240 hours and in-furnace temperature is less than 90 DEG C when come out of the stove;
Step 11:Double-steeping:The impregnation mixture after after baking will be completed in medium temperature coal pitch, and with 50 DEG C -60 DEG C/temperature rise speed of h is heated to 300-500 degree, vacuumizes rear pressurize treatment, single-steeping rate of body weight gain reaches 13-14%;
Step 12:Three roastings:By three roastings of mixture shove charge so that in-furnace temperature is rapidly achieved 350 DEG C, is then changed to 5 DEG C for every eight hours of even intensification, is warming up to 520 DEG C and is kept for 24 hours, and uniform intensification again is warming up to 1250 DEG C for 27 DEG C for every eight hours, 1250 DEG C of stages of high temperature maintain 48 hours to close fire, then cool down the mixture after roasting 240 hours and in-furnace temperature is less than 90 DEG C when come out of the stove;
Step 13:Three dippings:The impregnation mixture after three roastings will be completed in medium temperature coal pitch, vacuumized at rear pressurize Reason, single-steeping rate of body weight gain reaches 9-10%;
Step 14:Graphitization:The mixture that step 13 is obtained is put into acheson furnace, is that product temperature reaches 2800- 2900 DEG C so that mixture graphitization.
The temperature control of pressing mold shaping is at 25-30 DEG C in described step 7.
Mixture test resistance rate after the graphitization that described step 14 is obtained, it is desirable in 12-13 μ Ω m.
Beneficial effects of the present invention:A kind of production technology of polycrystalline silicon base plate special graphite of the present invention, specifically designed for polycrystalline Silicon base plate is processed with graphite, with strong points, and the special of special 1100X1100X250mm is processed using rational production technology With graphite, the specialized degree of production is high, reduces the labour intensity of workman, reduces workman's replacement frequency, considerably reduces life Produce cost, it is adaptable to large-scale production.
Specific embodiment
Embodiment 1
A kind of production technology of polycrystalline silicon base plate special graphite, described production technology comprises the following steps:
Step 1:Preparing raw material:Pitch coke, petroleum coke are crushed respectively by 5R pendulum type ring roll pulverizers, pitch coke, petroleum coke Raw material particle size tails over 5% by 325 mesh sieves;
Step 2:Mixed dehydration:Pitch coke, the petroleum coke particles that will be obtained in step 1 are 3 according to mass ratio:7 are added to stirring Machine is well mixed, and then heats the mixture to 120 DEG C, and holding carries out thermal dehydration in 40 minutes;
Step 3:It is prepared by pitch:100 hours are stood by infusion from modified coal tar pitch, and temperature control is made at 160 DEG C Standby pitch;
Step 4:Premix:The compound that the pitch and step 2 prepared in optional step 3 are obtained, described compound and pitch Mass ratio is 40%, will such as to mixing in mixing plant by compound and pitch, and control mixing temperature is in 173 DEG C, incorporation time It is 60min;
Step 5:Rolled sheet:The mixture prepared in step 4 is put into plastics processing mill, flakiness is rolled by plastics processing mill, The thickness of described thin slice is 2mm, will roll thin slice and is deposited in the case of temperature 50 C 48 hours;
Step 6:Grinding:Thin slice prepared by step 5 is put into 5R pendulum type ring roll pulverizers powder is obtained, and powder is passed through 200 mesh Sieve, tails over no more than 20%;
Step 7:Pressing mold is molded:The powder prepared in step 6 is encased in mould, the pressing mold density for making reaches 1.45g/ Cm3, and place 48 hours indoors;
Step 8:Once it is calcined:Mixture shove charge compressing in step 7 is calcined so that in-furnace temperature is rapidly achieved 350 DEG C, 5 DEG C for every eight hours of uniform intensification is then changed to, it is warming up to 520 DEG C and is kept for 24 hours, uniform intensification again rises for 27 DEG C for every eight hours Temperature maintains close fire within 48 hours to 1250 DEG C in 1250 DEG C of stages of high temperature, and the mixture after roasting then is cooled down into 240 hours and stove Interior temperature is come out of the stove when being less than 90 DEG C;
Step 9:Single-steeping:The impregnation mixture after being once calcined will be completed in medium temperature coal pitch, and with 50 DEG C/h's Temperature rise speed is heated to 300 degree, vacuumizes rear pressurize treatment, and single-steeping rate of body weight gain reaches 18%;
Step 10:After baking:By mixture shove charge after baking so that in-furnace temperature is rapidly achieved 350 DEG C, then it is changed to 5 DEG C for every eight hours of even intensification, is warming up to 520 DEG C and is kept for 24 hours, and uniform intensification again is warming up to 1250 DEG C for 27 DEG C for every eight hours, 1250 DEG C of stages of high temperature maintain 48 hours to close fire, then cool down the mixture after roasting 240 hours and in-furnace temperature is less than 90 DEG C when come out of the stove;
Step 11:Double-steeping:The impregnation mixture after after baking will be completed in medium temperature coal pitch, and with 50 DEG C/h's Temperature rise speed is heated to 300 degree, vacuumizes rear pressurize treatment, and single-steeping rate of body weight gain reaches 13%;
Step 12:Three roastings:By three roastings of mixture shove charge so that in-furnace temperature is rapidly achieved 350 DEG C, is then changed to 5 DEG C for every eight hours of even intensification, is warming up to 520 DEG C and is kept for 24 hours, and uniform intensification again is warming up to 1250 DEG C for 27 DEG C for every eight hours, 1250 DEG C of stages of high temperature maintain 48 hours to close fire, then cool down the mixture after roasting 240 hours and in-furnace temperature is less than 90 DEG C when come out of the stove;
Step 13:Three dippings:The impregnation mixture after three roastings will be completed in medium temperature coal pitch, vacuumized at rear pressurize Reason, single-steeping rate of body weight gain reaches 9%;
Step 14:Graphitization:The mixture that step 13 is obtained is put into acheson furnace, is that product temperature reaches 2800 DEG C, So that mixture graphitization.
The temperature control of pressing mold shaping is at 25 DEG C in described step 7.
Beneficial effects of the present invention:A kind of production technology of polycrystalline silicon base plate special graphite of the present invention, specifically designed for polycrystalline Silicon base plate is processed with graphite, with strong points, and the special of special 1100X1100X250mm is processed using rational production technology With graphite, the specialized degree of production is high, reduces the labour intensity of workman, reduces workman's replacement frequency, considerably reduces life Produce cost, it is adaptable to large-scale production.
Embodiment 2
A kind of production technology of polycrystalline silicon base plate special graphite, described production technology comprises the following steps:
Step 1:Preparing raw material:Pitch coke, petroleum coke are crushed respectively by 5R pendulum type ring roll pulverizers, pitch coke, petroleum coke Raw material particle size tails over 10% by 325 mesh sieves;
Step 2:Mixed dehydration:Pitch coke, the petroleum coke particles that will be obtained in step 1 are 3 according to mass ratio:7 are added to stirring Machine is well mixed, and then heats the mixture to 125 DEG C, and holding carries out thermal dehydration in 40 minutes;
Step 3:It is prepared by pitch:120 hours are stood by infusion from modified coal tar pitch, and temperature control is made at 165 DEG C Standby pitch;
Step 4:Premix:The compound that the pitch and step 2 prepared in optional step 3 are obtained, described compound and pitch Mass ratio is 41%, will such as to mixing in mixing plant by compound and pitch, and control mixing temperature is in 178 DEG C, incorporation time It is 60min;
Step 5:Rolled sheet:The mixture prepared in step 4 is put into plastics processing mill, flakiness is rolled by plastics processing mill, The thickness of described thin slice is 2.5mm, will roll thin slice and is deposited in the case of temperature 60 C 48 hours;
Step 6:Grinding:Thin slice prepared by step 5 is put into 5R pendulum type ring roll pulverizers powder is obtained, and powder is passed through 200 mesh Sieve, tails over no more than 25%;
Step 7:Pressing mold is molded:The powder prepared in step 6 is encased in mould, the pressing mold density for making reaches 1.46g/ Cm3, and place 50 hours indoors;
Step 8:Once it is calcined:Mixture shove charge compressing in step 7 is calcined so that in-furnace temperature is rapidly achieved 350 DEG C, 5 DEG C for every eight hours of uniform intensification is then changed to, it is warming up to 520 DEG C and is kept for 24 hours, uniform intensification again rises for 27 DEG C for every eight hours Temperature maintains close fire within 48 hours to 1250 DEG C in 1250 DEG C of stages of high temperature, and the mixture after roasting then is cooled down into 240 hours and stove Interior temperature is come out of the stove when being less than 90 DEG C;
Step 9:Single-steeping:The impregnation mixture after being once calcined will be completed in medium temperature coal pitch, and with 60 DEG C/h's Temperature rise speed is heated to 500 degree, vacuumizes rear pressurize treatment, and single-steeping rate of body weight gain reaches 19%;
Step 10:After baking:By mixture shove charge after baking so that in-furnace temperature is rapidly achieved 350 DEG C, then it is changed to 5 DEG C for every eight hours of even intensification, is warming up to 520 DEG C and is kept for 24 hours, and uniform intensification again is warming up to 1250 DEG C for 27 DEG C for every eight hours, 1250 DEG C of stages of high temperature maintain 48 hours to close fire, then cool down the mixture after roasting 240 hours and in-furnace temperature is less than 90 DEG C when come out of the stove;
Step 11:Double-steeping:The impregnation mixture after after baking will be completed in medium temperature coal pitch, and with 60 DEG C/h Temperature rise speed be heated to 500 degree, vacuumize rear pressurize treatment, single-steeping rate of body weight gain reaches 14%;
Step 12:Three roastings:By three roastings of mixture shove charge so that in-furnace temperature is rapidly achieved 350 DEG C, is then changed to 5 DEG C for every eight hours of even intensification, is warming up to 520 DEG C and is kept for 24 hours, and uniform intensification again is warming up to 1250 DEG C for 27 DEG C for every eight hours, 1250 DEG C of stages of high temperature maintain 48 hours to close fire, then cool down the mixture after roasting 240 hours and in-furnace temperature is less than 90 DEG C when come out of the stove;
Step 13:Three dippings:The impregnation mixture after three roastings will be completed in medium temperature coal pitch, vacuumized at rear pressurize Reason, single-steeping rate of body weight gain reaches 10%;
Step 14:Graphitization:The mixture that step 13 is obtained is put into acheson furnace, is that product temperature reaches 2900 DEG C, So that mixture graphitization.
The temperature control of pressing mold shaping is at 25-30 DEG C in described step 7.
Beneficial effects of the present invention:A kind of production technology of polycrystalline silicon base plate special graphite of the present invention, specifically designed for polycrystalline Silicon base plate is processed with graphite, with strong points, and the special of special 1100X1100X250mm is processed using rational production technology With graphite, the specialized degree of production is high, reduces the labour intensity of workman, reduces workman's replacement frequency, considerably reduces life Produce cost, it is adaptable to large-scale production.

Claims (3)

1. a kind of production technology of polycrystalline silicon base plate special graphite, it is characterised in that:Described production technology comprises the following steps:
Step 1:Preparing raw material:Pitch coke, petroleum coke are crushed respectively by 5R pendulum type ring roll pulverizers, pitch coke, petroleum coke Raw material particle size tails over 5%-10% by 325 mesh sieves;
Step 2:Mixed dehydration:Pitch coke, the petroleum coke particles that will be obtained in step 1 are 3 according to mass ratio:7 are added to stirring Machine is well mixed, and then heats the mixture to 120-125 DEG C, and holding carries out thermal dehydration in 40 minutes;
Step 3:It is prepared by pitch:Stood by infusion from modified coal tar pitch and be not less than 100 hours, and by temperature control in 160- Pitch is prepared at 165 DEG C;
Step 4:Premix:The compound that the pitch and step 2 prepared in optional step 3 are obtained, described compound and pitch Mass ratio is 40%-41%, and compound and pitch such as to mixing in mixing plant will be controlled into mixing temperature at 173-178 DEG C, Incorporation time is 60min;
Step 5:Rolled sheet:The mixture prepared in step 4 is put into plastics processing mill, flakiness is rolled by plastics processing mill, The thickness of described thin slice is 2-2.5mm, will roll thin slice and is deposited 48 hours in the case of 50-60 DEG C of temperature;
Step 6:Grinding:Thin slice prepared by step 5 is put into 5R pendulum type ring roll pulverizers powder is obtained, and powder is passed through 200 mesh Sieve, tails over no more than 20%-25%;
Step 7:Pressing mold is molded:The powder prepared in step 6 is encased in mould, the pressing mold density for making reaches 1.45- 1.46g/cm3, and place indoors no less than 48 hours;
Step 8:Once it is calcined:Mixture shove charge compressing in step 7 is calcined so that in-furnace temperature is rapidly achieved 350 DEG C, 5 DEG C for every eight hours of uniform intensification is then changed to, it is warming up to 520 DEG C and is kept for 24 hours, uniform intensification again rises for 27 DEG C for every eight hours Temperature maintains close fire within 48 hours to 1250 DEG C in 1250 DEG C of stages of high temperature, and the mixture after roasting then is cooled down into 240 hours and stove Interior temperature is come out of the stove when being less than 90 DEG C;
Step 9:Single-steeping:The impregnation mixture after being once calcined will be completed in medium temperature coal pitch, and with 50 DEG C -60 DEG C The temperature rise speed of/h is heated to 300-500 degree, vacuumizes rear pressurize treatment, and single-steeping rate of body weight gain reaches 18-19%;
Step 10:After baking:By mixture shove charge after baking so that in-furnace temperature is rapidly achieved 350 DEG C, then it is changed to 5 DEG C for every eight hours of even intensification, is warming up to 520 DEG C and is kept for 24 hours, and uniform intensification again is warming up to 1250 DEG C for 27 DEG C for every eight hours, 1250 DEG C of stages of high temperature maintain 48 hours to close fire, then cool down the mixture after roasting 240 hours and in-furnace temperature is less than 90 DEG C when come out of the stove;
Step 11:Double-steeping:The impregnation mixture after after baking will be completed in medium temperature coal pitch, and with 50 DEG C -60 DEG C/temperature rise speed of h is heated to 300-500 degree, vacuumizes rear pressurize treatment, single-steeping rate of body weight gain reaches 13-14%;
Step 12:Three roastings:By three roastings of mixture shove charge so that in-furnace temperature is rapidly achieved 350 DEG C, is then changed to 5 DEG C for every eight hours of even intensification, is warming up to 520 DEG C and is kept for 24 hours, and uniform intensification again is warming up to 1250 DEG C for 27 DEG C for every eight hours, 1250 DEG C of stages of high temperature maintain 48 hours to close fire, then cool down the mixture after roasting 240 hours and in-furnace temperature is less than 90 DEG C when come out of the stove;
Step 13:Three dippings:The impregnation mixture after three roastings will be completed in medium temperature coal pitch, vacuumized at rear pressurize Reason, single-steeping rate of body weight gain reaches 9-10%;
Step 14:Graphitization:The mixture that step 13 is obtained is put into acheson furnace, is that product temperature reaches 2800- 2900 DEG C so that mixture graphitization.
2. a kind of production technology of polycrystalline silicon base plate special graphite as claimed in claim 1, it is characterised in that:Described step The temperature control of pressing mold shaping is at 25-30 DEG C in 7.
3. a kind of production technology of polycrystalline silicon base plate special graphite as claimed in claim 1, it is characterised in that:Described step Mixture test resistance rate after 14 graphitizations for obtaining, it is desirable in 12-13 μ Ω m.
CN201710031000.1A 2017-01-17 2017-01-17 A kind of production technology of polycrystalline silicon base plate special graphite Pending CN106744919A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710031000.1A CN106744919A (en) 2017-01-17 2017-01-17 A kind of production technology of polycrystalline silicon base plate special graphite

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710031000.1A CN106744919A (en) 2017-01-17 2017-01-17 A kind of production technology of polycrystalline silicon base plate special graphite

Publications (1)

Publication Number Publication Date
CN106744919A true CN106744919A (en) 2017-05-31

Family

ID=58945870

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710031000.1A Pending CN106744919A (en) 2017-01-17 2017-01-17 A kind of production technology of polycrystalline silicon base plate special graphite

Country Status (1)

Country Link
CN (1) CN106744919A (en)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1583557A (en) * 2004-05-27 2005-02-23 兴和兴永碳素有限公司 High density and intensity abrasive resistant graphite materials and producing process thereof
CN1712456A (en) * 2004-06-15 2005-12-28 顾向宏 Production of carbon powder
CN1832639A (en) * 2005-03-11 2006-09-13 上海碳素有限公司 Surperhigh power connector and preparation method thereof
CN1948219A (en) * 2006-11-07 2007-04-18 中钢集团吉林炭素股份有限公司 High conductive high strength graphite brick for ultralarge blast furnace, its production technology and application
CN102173409A (en) * 2011-01-04 2011-09-07 兴和县鑫源碳素有限公司 Preparation method for graphite carbon material
CN102364989A (en) * 2011-07-01 2012-02-29 中平能化集团开封炭素有限公司 Ultra-high power graphite electrode nipple with diameter of 318mm and production method thereof
CN102381700A (en) * 2011-07-27 2012-03-21 中钢集团吉林炭素股份有限公司 Manufacturing method of graphite material
CN102502603A (en) * 2011-11-01 2012-06-20 雅安恒圣高纯石墨科技有限责任公司 Production process of large isotropic and isostatic high purity graphite with fine particles

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1583557A (en) * 2004-05-27 2005-02-23 兴和兴永碳素有限公司 High density and intensity abrasive resistant graphite materials and producing process thereof
CN1712456A (en) * 2004-06-15 2005-12-28 顾向宏 Production of carbon powder
CN1832639A (en) * 2005-03-11 2006-09-13 上海碳素有限公司 Surperhigh power connector and preparation method thereof
CN1948219A (en) * 2006-11-07 2007-04-18 中钢集团吉林炭素股份有限公司 High conductive high strength graphite brick for ultralarge blast furnace, its production technology and application
CN102173409A (en) * 2011-01-04 2011-09-07 兴和县鑫源碳素有限公司 Preparation method for graphite carbon material
CN102364989A (en) * 2011-07-01 2012-02-29 中平能化集团开封炭素有限公司 Ultra-high power graphite electrode nipple with diameter of 318mm and production method thereof
CN102381700A (en) * 2011-07-27 2012-03-21 中钢集团吉林炭素股份有限公司 Manufacturing method of graphite material
CN102502603A (en) * 2011-11-01 2012-06-20 雅安恒圣高纯石墨科技有限责任公司 Production process of large isotropic and isostatic high purity graphite with fine particles

Similar Documents

Publication Publication Date Title
CN103539109B (en) Graphite material for polysilicon ingot heat preservation thermal field and preparation method thereof
CN104529450B (en) A kind of forming method of big specification isostatic pressing formed graphite goods
CN101691300B (en) Large-size medium-grained graphite material and production process thereof
CN107032791B (en) Large-size high-power graphite electrode and manufacturing method thereof
CN102730672A (en) Production technology of large-specification extraordinary isotropic graphite material
CN108706973B (en) Preparation method of high-strength high-thermal-conductivity graphite material
CN108620586B (en) 3D printing high-density titanium-titanium boride composite material and preparation method thereof
CN102951634A (en) Oversized isostatic pressing graphite and production method thereof
CN105272287B (en) A method of preparing graphite crucible with recycled graphite
CN109133927A (en) A kind of short flow process of high performance graphite material
CN101665251B (en) Preparing method of isotropic graphite
CN106478102A (en) High-density ultra-fine pore structure graphite production processes
CN102963882A (en) Preparation process of carbon source powder for synthesis of high-grade coarse-grained diamond through high-temperature static-pressure catalytic method
CN108083806B (en) Superfine structure isotropic graphite and preparation method thereof
CN106698416A (en) Process for producing cold isostatic pressing high purity graphite
CN106744919A (en) A kind of production technology of polycrystalline silicon base plate special graphite
CN108129148A (en) A kind of preparation method of low bulk graphite material
CN105884357B (en) It is a kind of for hot-forming graphite jig material and preparation method thereof
CN103962568A (en) Method for preparing reduction chromium powder through microwave heating
CN103864048A (en) Method for preparing large high-power carbon electrode by using semi-graphitized anthracite
CN106830938A (en) A kind of production technology of photovoltaic graphite crucible
CN107857261A (en) A kind of preparation method of nuclear graphite materials
CN103449817A (en) Cold end of silicon carbide rod and production method thereof
CN107840328B (en) A kind of isostatic pressing formed graphite and its production method
CN103011854B (en) Method for processing raw material of isostatic pressing clay-graphite crucible

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20170531