CN107986786A - A kind of graphite product and production method - Google Patents

A kind of graphite product and production method Download PDF

Info

Publication number
CN107986786A
CN107986786A CN201711193996.2A CN201711193996A CN107986786A CN 107986786 A CN107986786 A CN 107986786A CN 201711193996 A CN201711193996 A CN 201711193996A CN 107986786 A CN107986786 A CN 107986786A
Authority
CN
China
Prior art keywords
broken
roasting
accounting
purity
calcined
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
CN201711193996.2A
Other languages
Chinese (zh)
Inventor
刘伟凯
张培模
庞中海
袁霞
赵海祥
李义
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.)
Datong Xincheng New Material Co Ltd
Original Assignee
Datong Xincheng New Material Co Ltd
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 Datong Xincheng New Material Co Ltd filed Critical Datong Xincheng New Material Co Ltd
Priority to CN201711193996.2A priority Critical patent/CN107986786A/en
Publication of CN107986786A publication Critical patent/CN107986786A/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
    • C04B35/52—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite
    • C04B35/522—Graphite
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/48—Organic compounds becoming part of a ceramic after heat treatment, e.g. carbonising phenol resins
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/74—Physical characteristics
    • C04B2235/77—Density
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance

Abstract

The invention belongs to the preparation field of graphite material, specifically, is related to a kind of graphite product.The graphite product is to roast broken, calcined coke and pitch as raw material, through being prepared including broken, milling, kneading, the material that dries in the air, vibration moulding, roasting, dipping and graphited process.Graphite product cracking breakout of the present invention is low, with bulk density is big, resistivity is low, intensity is high, the advantages such as ash content is low.The invention further relates to a kind of production method of the graphite product, which had both improved the yield rate and quality of graphite product, while took full advantage of material goods, improved the output value, reduced loss.

Description

A kind of graphite product and production method
Technical field
The invention belongs to the preparation field of graphite material, specifically, is related to a kind of graphite product and production method.
Background technology
Isostatic pressing formed graphite is a kind of New graphite material to grow up the sixties in last century, has a series of excellent property Can, it is widely used in the fields such as metallurgical, chemistry, electric, aerospace and atomic energy industry.
Isostatic pressing formed graphite it is heat-resist, under an inert atmosphere, with the rise of temperature, its mechanical strength does not reduce not only, Raise on the contrary, 2500 DEG C or so whens reach peak.Compared with common graphite, fine structure is fine and close, and uniformity is good.Heat is swollen Swollen coefficient is very low, and strong with excellent thermal shock resistance, isotropism, chemical resistance, heat conductivility and electric conductivity are good, With excellent machining property.
With common graphite, such as graphite electrode for making steel, graphite anode for magnesium electrolysis, graphitization cathode used for aluminium electrolysis etc. one Sample, isostatic pressing formed graphite will also pass through raw material and calcine, crushing, sieving, being milled, the fusing of bonding agent and dispensing, kneading, into The processing of the processes such as type, roasting, dipping, graphitization.But the production technology of isostatic pressing formed graphite and graphite electrode, graphite anode Or graphitization cathode is completely different.The raw material of isostatic pressing formed graphite Structure of need isotropy is, it is necessary to be milled into thinner powder , it is necessary to using vibration moulding technology, firing cycle can very be grown at end, in order to reach target density, it is necessary to multiple dipping, roasting Circulation is burnt, the graphited cycle is also more much longer than common graphite.Wherein, graphitization is to be heated to the product after roasting about 3000 DEG C, carbon atom lattice ordered arrangement, completes the transformation from charcoal to graphite, is graphitization.Method for graphitizing have Acheson's method, Internal thermal serial method, high-frequency induction method etc..Common Acheson's method, product take around 1~1.5 month from shove charge to coming out of the stove Time.Several tons to tens tons of roasting product can be handled per stove.After graphitization, the bulk density of product, conductivity, thermal conductivity and Corrosion resistance obtains the improvement of many degree, and machining property is also improved.But graphitization can reduce product Flexural strength.Simultaneously as acheson graphiteization, which is mainly the heat produced by resistance material, carrys out heating product, in same graphitization In stove furnace core, upper and lower, left and right, inside and outside temperature gradient differ greatly, and be easy to cause product crackle, reduce yield rate.
In view of this, it is special to propose the present patent application.
The content of the invention
The technical problem to be solved in the present invention is to overcome the deficiencies of the prior art and provide a kind of graphite product and producer Method.
To solve above-mentioned technical problem, the present invention is using the basic conception of technical solution：
A kind of graphite product, its to roast broken, calcined coke and pitch as raw material, through including broken, milling, kneading, dry in the air Material, vibration moulding, roasting, dipping and graphited process prepare.
Common graphite in calcining process, during heating because graphite product volume contraction, discharge volatile matter and unnecessary Easily cracked during impurity, because the local cooling of same block graphite product is uneven during cooling, effect of expanding with heat and contract with cold increase is also held Crackle is also easy to produce, therefore, higher in the probability of the cracked waste product of the graphite product of the prior art, yield rate is low.In addition, graphite Product is not recycled, causes great waste once cracked can only just be handled as waste product.
The present invention is using roasting broken the advantages of preparing graphite product：
First, roasting is broken have passed through calcining process, has completed the contraction of raw material volume, has possessed higher bulk density, It is added in raw material and carries out shaping compacting, larger volume contraction will not be caused when being roasted again, so as to is conducive to Improve the bulk density of graphite product.
Again, roasting is broken have passed through calcining process, has completed to discharge volatile matter and undesired impurities, has been added in raw material The crackle waste product problems caused by factor such as outer row's volatile matter and undesired impurities can be avoided when being roasted, improve its graphite product Yield rate.
Therefore, graphite product of the invention is not only produced using the roasting waste product (roasting is broken) in technical process as raw material High-density graphite product is obtained, improves the yield rate of graphite product, and takes full advantage of the waste product in production process, is become Waste be changed into values, economizes on resources, and improves economic profit.
One embodiment of the present invention, the broken composition of the roasting are as follows：
0.5~0.8mm roastings are broken, and purity is more than 80%, and accounting is 45%~55%；
0~0.5mm roastings are broken, and purity is more than 60%, and accounting is 55%~45%.
One embodiment of the present invention, the composition of the calcined coke are as follows：
0.5~0.8mm calcined cokes, purity are more than 80%, and accounting is 25%~35%；
0~0.5mm calcined cokes, purity are more than 80%, and accounting is 25%~35%；
- 0.075mm calcined cokes, purity are 70%~75%, and accounting is 30%~50%.
Broken and calcined coke will be roasted and be prepared into different particle diameters, it is then again that the broken individually mixing of the roasting of a variety of particle diameters is equal It is even, the calcined coke of a variety of particle diameters is individually uniformly mixed, it is spare.
The roasting of the composition is broken and calcined coke is beneficial to discharge volatile matter and undesired impurities in temperature-rise period is roasted, Volume contraction is reduced, the bulk density of graphite product is improved, reduces cracked probability.And with block graphite product when cooling down Cooling evenly, reduction is expanded with heat and contract with cold effect, avoids cracking so that the comprehensive final finished rate for improving graphite product, Reduce cracking breakout.
One embodiment of the present invention, the softening point of the pitch ring and ball method measure are less than 90 DEG C, are preferably 80~90 DEG C, more preferably 86~88 DEG C；
Preferably, used after when the pitch dewatering precipitation 36~48 is small.
Above-described pitch easily mixes evenly with the broken and calcined coke of the roasting, bonds and forms uniformly complete net Network architecture, so as to help to improve the bulk density of graphite product.
One embodiment of the present invention, raw material include 35~55 parts by weight and roast broken, 20~35 parts by weight calcined cokes With 10~25 parts by weight pitches；
Preferably, raw material includes 50 parts by weight broken, the 30 parts by weight calcined cokes of roasting and 20 parts by weight pitches.
Technical staff has found in the course of the research, the body for the graphite product that the raw material prepared according to aforementioned proportion is prepared Product density, mechanical strength, electric conductivity and thermal conductivity are relatively more excellent, and it is cracked to significantly reduce finished product with respect to higher for yield rate Probability.
Preferably, bulk density >=1.75g/cm of the graphite product3, the μ Ω m of resistivity≤9, thermal coefficient of expansion ≤2.5×10-6/ DEG C, compression strength >=30Mpa, flexural strength >=14Mpa, ash content≤0.2%.
It is highly preferred that bulk density >=1.78g/cm of the graphite product3, the μ Ω m of resistivity≤7.5, thermal expansion Coefficient≤2.0 × 10-6/ DEG C, compression strength >=40Mpa, flexural strength >=25Mpa, ash content≤0.15%.
The present invention also provides a kind of production method of graphite product, including broken, milling, kneading, the material that dries in the air, vibration moulding, Roasting, dipping and graphited process, and by calcining process produce roasting waste recovery utilize, and with calcined coke, pitch It is used as raw material together.
One embodiment of the present invention, the production method specifically include the following steps：
S1, prepare raw material：
The roasting waste product of recycling calcining process generation simultaneously crushes, as aggregate；
Calcined coke is crushed, it is stand-by；
Pitch dewatering is precipitated, squeezes into head tank, it is stand-by；
S2, kneading：
The broken, calcined coke of ready roasting is carried out in kneading pot with certain proportion dry-mixed；
After dry-mixed, it is proportionally added into pitch and carries out wet mixing, obtain thickener；
S3, dry in the air material；
S4, vibration moulding：Mold charge is selected, it is compressing and cool down after precompressed, positive pressure and the demoulding；
S5, fired, dipping and graphitization, up to graphite product.
The step S4 can specifically include following operating procedure：
The mould of corresponding size, the necessary admittance deep fat of upper/lower die, to mould heating (temperature are designed according to the requirement of client Spend 90 DEG C of ＞), to ensure that the temperature with thickener approaches；
Charging：Opening, which is dried in the air, expects pot, the thickener dried well is transported in mould by conveyer belt, the speed of transport should not be too It hurry up, removed dough (thickener of hardening) with facilitating；
Precompressed：In this pressing process, the empty material above mould is depressed with the weight of upper mold；
Positive pressure：The pressure of 8~12MPa of Vibration on Start-up platform, vibrates while suppress, and by the hydraulic pressure above mould Column, which is put down, carries out hydraulic pressure compacting；
The demoulding：First hydraulic column is withdrawn, plays upper die and lower die successively, after product all leaks out the external world, with pusher by under Form board tape mould is shifted onto on hanging scaffold, then carries out cleaning surface, is finally numbered with steel seal and indicates pitch coke；
Shaping：Make the body of product is close to reach 1.70g/cm3More than；
Cooling：If bulk density is up to standard, product is cooled down into the water 48 it is small when, after water outlet examine appearance it is whether qualified.
One embodiment of the present invention, in the step S1, will roast broken broken milling and is respectively prepared：
0.5~0.8mm roastings are broken, and purity is more than 80%, and accounting is 45%~55%；
0~0.5mm roastings are broken, and purity is more than 60%, and accounting is 55%~45%；
Calcined coke is crushed milling to be respectively prepared：
0.5~0.8mm calcined cokes, purity are more than 80%, and accounting is 25%~35%；
0~0.5mm calcined cokes, purity are more than 80%, and accounting is 25%~35%；
- 0.075mm calcined cokes, purity are 70%~75%, and accounting is 30%~50%；
It is stand-by by the roasting of different-grain diameter is broken, calcined coke is individually uniformly mixed；
Preferably, the part by weight for roasting broken, calcined coke and pitch is 35~55：20~35：10~25, more preferably 5： 3：2.
One embodiment of the present invention, in the step S2, the temperature that roasting is broken, calcined coke is dry-mixed is 120~140 DEG C, the time is 15~30min；The temperature of wet mixing is 130~140 DEG C, and the time is 10~20min；
The dry or wet mixing process makes pitch be mixed with the broken, calcined coke of roasting of the present invention fully, easy to shape Into firm netted entirety, the bulk density and yield rate of graphite product are helped to improve.
One embodiment of the present invention, in the step S3, the temperature of dry in the air material to thickener is 100~120 DEG C, uses thermometric Rifle multi-point temperature measurement is to control the time for the material that dries in the air；
The above-mentioned material process that dries in the air fully can discharge unnecessary flue gas, volatile matter and heat, make thickener block evenly, The mobility of pitch is not influenced beneficial to shaping and.
One embodiment of the present invention, the step S5 include double roasting process, and the temperature once roasted is 1050 DEG C, when the time is 600 small, the temperature of after baking is 900 DEG C, when the time is 500 small.
Roasting product is checked in once roasting, after baking process, after once roasting, the bulk density ＞ of product 1.65g/cm3, after after baking, the bulk density ＞ 1.74g/cm of product3。
The specific operating procedure of the dipping is：Product is transported to dipping workshop after once roasting, by product table The unnecessary impurity in face is cleaned out, load steeping frame in, the steeping frame installed is hung on traversing dolly, push-in preheating furnace into Row preheating, pushes it into impregnating autoclave after preheating and is impregnated, make pickled product rate of body weight gain >=15%.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, with reference to section Example to the present invention's Technical solution is clearly and completely described, and following embodiments are merely to illustrate the present invention, is not used in the model of the limitation present invention Enclose.
Embodiment 1
Raw material is：Roast broken, calcined coke and pitch.
The production method of graphite product includes the following steps：
S1, prepare raw material：
The roasting waste product of recycling calcining process generation simultaneously crushes, as aggregate；
Calcined coke is crushed, it is stand-by；
Pitch dewatering is precipitated, squeezes into head tank, it is stand-by；
S2, kneading：
The broken, calcined coke of ready roasting is carried out in kneading pot with certain proportion dry-mixed；
After dry-mixed, it is proportionally added into pitch and carries out wet mixing, obtain thickener；
S3, dry in the air material；
S4, vibration moulding：Mold charge is selected, it is compressing and cool down after precompressed, positive pressure and the demoulding；
S5, fired, dipping and graphitization, up to graphite product.
The cracking breakout of graphite product is less than 8%, and the parameter of obtained graphite product is：Bulk density >=1.75g/cm3, electricity The μ Ω m of resistance rate≤9, thermal coefficient of expansion≤2.5 × 10-6/ DEG C, compression strength >=30Mpa, flexural strength >=14Mpa, ash content≤ 0.2%.
Embodiment 2
Raw material is：Broken, calcined coke and pitch are roasted, wherein, the broken composition of the roasting is as follows：
0.5~0.8mm roastings are broken, and purity is more than 80%, and accounting is 45%~55%；
0~0.5mm roastings are broken, and purity is more than 60%, and accounting is 55%~45%.
The composition of calcined coke is as follows：
0.5~0.8mm calcined cokes, purity are more than 80%, and accounting is 25%~35%；
0~0.5mm calcined cokes, purity are more than 80%, and accounting is 25%~35%；
- 0.075mm calcined cokes, purity are 70%~75%, and accounting is 30%~50%.
The production method of graphite product includes the following steps：
S1, prepare raw material：
The roasting waste product that calcining process produces is recycled, broken broken milling will be roasted and be respectively prepared：0.5~0.8mm roastings are broken, Purity is more than 80%, and accounting is 45%~55%, and 0~0.5mm roastings are broken, and purity is more than 60%, and accounting is 55%~45%, and The roasting of different-grain diameter is broken uniformly mixed, as aggregate；
Calcined coke is crushed, 0.5~0.8mm calcined cokes are respectively prepared, purity is more than 80%, and accounting is 25%~35%, 0 ~0.5mm calcined cokes, purity are more than 80%, and accounting is 25%~35%, -0.075mm calcined cokes, and purity is 70%~75%, Accounting is 30%~50%, and the calcined coke of different-grain diameter is uniformly mixed, stand-by；
Pitch dewatering is precipitated, squeezes into head tank, it is stand-by；
S2, kneading：
The broken, calcined coke of ready roasting is carried out in kneading pot with certain proportion dry-mixed；
After dry-mixed, it is proportionally added into pitch and carries out wet mixing, obtain thickener；
S3, dry in the air material；
S4, vibration moulding：Mold charge is selected, it is compressing and cool down after precompressed, positive pressure and the demoulding；
S5, fired, dipping and graphitization, up to graphite product.
The cracking breakout of graphite product is less than 6%, and the parameter of obtained graphite product is：Bulk density >=1.78g/cm3, electricity The μ Ω m of resistance rate≤7.5, thermal coefficient of expansion≤2.0 × 10-6/ DEG C, compression strength >=40Mpa, flexural strength >=25Mpa, ash content ≤ 0.15%.
Embodiment 2 has carried out the processing that a variety of particle diameters crush milling respectively relative to embodiment 1, calcined coke broken to roasting, Using the uniformly mixed roasting including a variety of particle diameters is broken, calcined coke is produced as raw material, the appearance of its obtained graphite product The probability of crackle reduces, and the performance of graphite product is improved.
Embodiment 3
Raw material is：3500kg roasts broken, 2000kg calcined cokes and 1000kg pitches, wherein, the broken composition of the roasting is such as Under：
0.5~0.8mm roastings are broken, and purity is more than 80%, accounting 45%；
0~0.5mm roastings are broken, and purity is more than 60%, accounting 55%.
The composition of calcined coke is as follows：
0.5~0.8mm calcined cokes, purity are more than 80%, accounting 25%；
0~0.5mm calcined cokes, purity are more than 80%, accounting 25%；
- 0.075mm calcined cokes, purity are 70%~75%, accounting 50%.
The production method of graphite product includes the following steps：
S1, prepare raw material：
The roasting waste product that calcining process produces is recycled, broken broken milling will be roasted and be respectively prepared：0.5~0.8mm roastings are broken, Purity is more than 80%, and accounting 45%, 0~0.5mm roastings are broken, and purity is more than 60%, accounting 55%, and by different-grain diameter Roast it is broken be uniformly mixed, as aggregate；
Calcined coke is crushed, 0.5~0.8mm calcined cokes are respectively prepared, purity is more than 80%, accounting 25%, 0~ 0.5mm calcined cokes, purity are more than 80%, and accounting 25%, -0.075mm calcined cokes, purity is 70%~75%, and accounting is 50%, and the calcined coke of different-grain diameter is uniformly mixed, it is stand-by；
Pitch dewatering is precipitated, squeezes into head tank, it is stand-by；
S2, kneading：
The broken, calcined coke of ready roasting is carried out in kneading pot with certain proportion dry-mixed；
After dry-mixed, it is proportionally added into pitch and carries out wet mixing, obtain thickener；
S3, dry in the air material；
S4, vibration moulding：Mold charge is selected, it is compressing and cool down after precompressed, positive pressure and the demoulding；
S5, fired, dipping and graphitization, up to graphite product.
The cracking breakout of graphite product is 2.1%, and the parameter of obtained graphite product is：Bulk density is 1.85g/cm3, electricity Resistance rate is 6.1 μ Ω m, and thermal coefficient of expansion is 1.65 × 10-6/ DEG C, compression strength 71Mpa, flexural strength 33Mpa, ash content For 0.06%.
Embodiment 4
Raw material is：5500kg roasts broken, 3500kg calcined cokes and 2500kg pitches, wherein, the broken composition of the roasting is such as Under：
0.5~0.8mm roastings are broken, and purity is more than 80%, accounting 55%；
0~0.5mm roastings are broken, and purity is more than 60%, accounting 45%.
The composition of calcined coke is as follows：
0.5~0.8mm calcined cokes, purity are more than 80%, accounting 35%；
0~0.5mm calcined cokes, purity are more than 80%, accounting 35%；
- 0.075mm calcined cokes, purity are 70%~75%, accounting 30%.
The softening point of pitch ring and ball method measure is less than 90 DEG C, when pitch dewatering precipitation 36~48 is small after use.
The production method of graphite product includes the following steps：
S1, prepare raw material：
Recycle calcining process produce roasting waste product, will roast it is broken it is broken milling be respectively prepared 0.5~0.8mm roasting it is broken, Purity is more than 80%, and accounting 55%, 0~0.5mm roastings are broken, and purity is more than 60%, accounting 45%, and by different-grain diameter Roast it is broken be uniformly mixed, as aggregate；
Calcined coke is crushed, 0.5~0.8mm calcined cokes are respectively prepared, purity is more than 80%, accounting 35%, 0~ 0.5mm calcined cokes, purity are more than 80%, and accounting 35%, -0.075mm calcined cokes, purity is 70%~75%, and accounting is 30%, and the calcined coke of different-grain diameter is uniformly mixed, it is stand-by；
Pitch dewatering is precipitated, squeezes into head tank, it is stand-by；
S2, kneading：
The broken, calcined coke of ready roasting is carried out in kneading pot with certain proportion dry-mixed；
After dry-mixed, it is proportionally added into pitch and carries out wet mixing, obtain thickener；
S3, dry in the air material；
S4, vibration moulding：Mold charge is selected, it is compressing and cool down after precompressed, positive pressure and the demoulding；
S5, fired, dipping and graphitization, up to graphite product.
The cracking breakout of graphite product is 2%, and the parameter of obtained graphite product is：Bulk density is 1.87g/cm3, resistance Rate is 6.0 μ Ω m, and thermal coefficient of expansion is 1.63 × 10-6/ DEG C, compression strength 73Mpa, flexural strength 34Mpa, ash content is 0.05%.
Embodiment 5
Raw material is：5000kg roasts broken, 3000kg calcined cokes and 2000kg pitches, wherein, the broken composition of the roasting is such as Under：
0.5~0.8mm roastings are broken, and purity is more than 80%, accounting 50%；
0~0.5mm roastings are broken, and purity is more than 60%, accounting 50%.
The composition of calcined coke is as follows：
0.5~0.8mm calcined cokes, purity are more than 80%, accounting 30%；
0~0.5mm calcined cokes, purity are more than 80%, accounting 30%；
- 0.075mm calcined cokes, purity are 70%~75%, accounting 40%.
The softening point of pitch ring and ball method measure is 86~88 DEG C, when pitch dewatering precipitation 36~48 is small after use.
The production method of graphite product includes the following steps：
S1, prepare raw material：
Recycle calcining process produce roasting waste product, will roast it is broken it is broken milling be respectively prepared 0.5~0.8mm roasting it is broken, Purity is more than 80%, and accounting 50%, 0~0.5mm roastings are broken, and purity is more than 60%, accounting 50%, and by different-grain diameter Roast it is broken be uniformly mixed, as aggregate；
Calcined coke is crushed, 0.5~0.8mm calcined cokes are respectively prepared, purity is more than 80%, accounting 30%, 0~ 0.5mm calcined cokes, purity are more than 80%, and accounting 30%, -0.075mm calcined cokes, purity is 70%~75%, and accounting is 40%, and the calcined coke of different-grain diameter is uniformly mixed, it is stand-by；
By pitch dewatering precipitation 36~48 it is small when after, squeeze into head tank, it is stand-by；
S2, kneading：
By the broken, calcined coke of ready roasting proportionally carried out in kneading pot dry-mixed, dry-mixed temperature for 120~ 140 DEG C, the time is 15~30min；
After dry-mixed, be proportionally added into pitch and carry out wet mixing, the temperature of wet mixing is 130~140 DEG C, the time for 10~ 20min, obtains thickener；
S3, dry in the air material, and the temperature to thickener is 100~120 DEG C, with temperature-measuring gun multi-point temperature measurement to control the time for the material that dries in the air；
S4, vibration moulding：Mold charge is selected, it is compressing and cool down after precompressed, positive pressure and the demoulding；
S5, through double roasting process, wherein, the temperature once roasted be 1050 DEG C, the time for 600 it is small when, after baking Temperature be 900 DEG C, the time for 500 it is small when, then again through dipping and graphitization, up to graphite product.
The cracking breakout of graphite product is 1.0%, and the parameter of obtained graphite product is：Bulk density is 1.90g/cm3, electricity Resistance rate is 5.7 μ Ω m, and thermal coefficient of expansion is 1.54 × 10-6/ DEG C, compression strength 76Mpa, flexural strength 36Mpa, ash content For 0.02%.
Comparative example 1
The comparative example and embodiment 3 difference lies in：It is not added with roasting in raw material broken.
Other raw material compositions and production method are consistent with embodiment 3.
The cracking breakout of the graphite product of the comparative example is 13%, and the parameter of obtained graphite product is：Bulk density is 1.58g/cm3, resistivity is 9.8 μ Ω m, and thermal coefficient of expansion is 3.5 × 10-6/ DEG C, compression strength 25Mpa, flexural strength For 9Mpa, ash content 2%.
Therefore, in the case where other components and production technology are consistent, the broken production stone of roasting is not added in the feed When prepared by ink, its cracking breakout is higher, and yield rate is low, and the poor-performing of the graphite product of gained.
The above is only presently preferred embodiments of the present invention, not makees limitation in any form to the present invention, though So the present invention is disclosed above with preferred embodiment, but is not limited to the present invention, any technology people for being familiar with this patent Member without departing from the scope of the present invention, when the technology contents using above-mentioned prompting make it is a little change or be modified to The equivalent embodiment of equivalent variations, as long as being the content without departing from technical solution of the present invention, the technical spirit pair according to the present invention Any simple modification, equivalent change and modification that above example is made, in the range of still falling within the present invention program.

Claims (10)

  1. A kind of 1. graphite product, it is characterised in that to roast broken, calcined coke and pitch as raw material, through including broken, milling, Kneading, the material that dries in the air, vibration moulding, roasting, dipping and graphited process prepare.
  2. 2. graphite product according to claim 1, it is characterised in that the broken composition of the roasting is as follows：
    0.5~0.8mm roastings are broken, and purity is more than 80%, and accounting is 45%~55%；
    0~0.5mm roastings are broken, and purity is more than 60%, and accounting is 55%~45%.
  3. 3. graphite product according to claim 1 or 2, it is characterised in that the composition of the calcined coke is as follows：
    0.5~0.8mm calcined cokes, purity are more than 80%, and accounting is 25%~35%；
    0~0.5mm calcined cokes, purity are more than 80%, and accounting is 25%~35%；
    - 0.075mm calcined cokes, purity are 70%~75%, and accounting is 30%~50%.
  4. 4. according to claim 1-3 any one of them graphite products, it is characterised in that the softening of the pitch ring and ball method measure Point is less than 90 DEG C, is preferably 80~90 DEG C, more preferably 86~88 DEG C；
    Preferably, used after when the pitch dewatering precipitation 36~48 is small.
  5. 5. according to claim 1-4 any one of them graphite products, it is characterised in that raw material includes the roasting of 35~55 parts by weight Burn broken, 20~35 parts by weight calcined cokes and 10~25 parts by weight pitches；
    Preferably, raw material includes 50 parts by weight broken, the 30 parts by weight calcined cokes of roasting and 20 parts by weight pitches.
  6. 6. according to claim 1-5 any one of them graphite products, it is characterised in that bulk density >=1.75g/cm3, resistance The μ Ω m of rate≤9, thermal coefficient of expansion≤2.5 × 10-6/ DEG C, compression strength >=30Mpa, flexural strength >=14Mpa, ash content≤ 0.2%.
  7. 7. a kind of production method of graphite product, including broken, milling, kneading, the material that dries in the air, vibration moulding, roasting, dipping and graphite The process of change, it is characterised in that the roasting waste recovery for producing calcining process utilizes, and is used as together with calcined coke, pitch Raw material.
  8. 8. production method according to claim 7, it is characterised in that comprise the following steps：
    S1, prepare raw material：
    The roasting waste product of recycling calcining process generation simultaneously crushes, as aggregate；
    Calcined coke is crushed, it is stand-by；
    Pitch dewatering is precipitated, squeezes into head tank, it is stand-by；
    S2, kneading：
    The broken, calcined coke of ready roasting is carried out in kneading pot with certain proportion dry-mixed；
    After dry-mixed, it is proportionally added into pitch and carries out wet mixing, obtain thickener；
    S3, dry in the air material；
    S4, vibration moulding：Mold charge is selected, it is compressing and cool down after precompressed, positive pressure and the demoulding；
    S5, fired, dipping and graphitization, up to graphite product.
  9. 9. production method according to claim 8, it is characterised in that in the step S1, broken broken milling point will be roasted It is not made：
    0.5~0.8mm roastings are broken, and purity is more than 80%, and accounting is 45%~55%；
    0~0.5mm roastings are broken, and purity is more than 60%, and accounting is 55%~45%；
    Calcined coke is crushed milling to be respectively prepared：
    0.5~0.8mm calcined cokes, purity are more than 80%, and accounting is 25%~35%；
    0~0.5mm calcined cokes, purity are more than 80%, and accounting is 25%~35%；
    - 0.075mm calcined cokes, purity are 70%~75%, and accounting is 30%~50%；
    It is stand-by by the roasting of different-grain diameter is broken, calcined coke is individually uniformly mixed；
    Preferably, the part by weight for roasting broken, calcined coke and pitch is 35~55：20~35：10~25, more preferably 5：3：2.
  10. 10. production method according to claim 8 or claim 9, it is characterised in that in the step S2, roasting is broken, calcined coke is done Mixed temperature is 120~140 DEG C, and the time is 15~30min；The temperature of wet mixing is 130~140 DEG C, and the time is 10~20min；
    Preferably, in the step S3, the temperature of dry in the air material to thickener is 100~120 DEG C, is dried in the air with temperature-measuring gun multi-point temperature measurement with controlling The time of material；
    Preferably, the step S5 includes double roasting process, and the temperature once roasted is 1050 DEG C, when the time is 600 small, two The temperature of secondary roasting is 900 DEG C, when the time is 500 small.
CN201711193996.2A 2017-11-24 2017-11-24 A kind of graphite product and production method Pending CN107986786A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711193996.2A CN107986786A (en) 2017-11-24 2017-11-24 A kind of graphite product and production method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201711193996.2A CN107986786A (en) 2017-11-24 2017-11-24 A kind of graphite product and production method

Publications (1)

Publication Number Publication Date
CN107986786A true CN107986786A (en) 2018-05-04

Family

ID=62031996

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201711193996.2A Pending CN107986786A (en) 2017-11-24 2017-11-24 A kind of graphite product and production method

Country Status (1)

Country Link
CN (1) CN107986786A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108585916A (en) * 2018-07-19 2018-09-28 大同新成新材料股份有限公司 A kind of preparation method of graphite electrode nipple
CN108640681A (en) * 2018-06-06 2018-10-12 大同新成新材料股份有限公司 A kind of preparation method of special graphite carbon material
CN109503168A (en) * 2018-10-08 2019-03-22 湖北捷地安电气有限公司 A kind of efficient discharge earthing module
CN113912397A (en) * 2021-09-17 2022-01-11 大同新成新材料股份有限公司 Method for producing isostatic graphite product by using isostatic pressing roasting waste products
CN113929460A (en) * 2021-09-17 2022-01-14 大同新成新材料股份有限公司 Preparation method of isostatic pressing graphite material
CN113929461A (en) * 2021-09-17 2022-01-14 大同新成新材料股份有限公司 Preparation method of isotropic carbon material
CN114014659A (en) * 2021-11-05 2022-02-08 新疆农六师碳素有限公司 Novel high-end carbon product material for aluminum and preparation method thereof
CN115215655A (en) * 2022-08-09 2022-10-21 中钢集团南京新材料研究院有限公司 Kneading method of isostatic pressing graphite product and product thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101210332A (en) * 2006-12-31 2008-07-02 洛阳新安电力集团万基石墨制品有限公司 Graphitization cathode carbon block
CN102206080A (en) * 2011-05-05 2011-10-05 大同市新成特炭有限公司 Graphite material for monocrystalline silicon growth thermal field in solar photovoltaic industry and production method thereof
CN102730672A (en) * 2012-06-21 2012-10-17 湖南省长宇新型炭材料有限公司 Production technology of large-specification extraordinary isotropic graphite material
CN105668553A (en) * 2015-12-31 2016-06-15 平顶山东方碳素股份有限公司 Process of preparing high-strength carbon material from waste materials
KR20160117671A (en) * 2015-03-30 2016-10-11 한국세라믹기술원 Preparation Method of Hybrid Materials composed of Carbon-Based Two-Dimensional Plate materials

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101210332A (en) * 2006-12-31 2008-07-02 洛阳新安电力集团万基石墨制品有限公司 Graphitization cathode carbon block
CN102206080A (en) * 2011-05-05 2011-10-05 大同市新成特炭有限公司 Graphite material for monocrystalline silicon growth thermal field in solar photovoltaic industry and production method thereof
CN102730672A (en) * 2012-06-21 2012-10-17 湖南省长宇新型炭材料有限公司 Production technology of large-specification extraordinary isotropic graphite material
KR20160117671A (en) * 2015-03-30 2016-10-11 한국세라믹기술원 Preparation Method of Hybrid Materials composed of Carbon-Based Two-Dimensional Plate materials
CN105668553A (en) * 2015-12-31 2016-06-15 平顶山东方碳素股份有限公司 Process of preparing high-strength carbon material from waste materials

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108640681A (en) * 2018-06-06 2018-10-12 大同新成新材料股份有限公司 A kind of preparation method of special graphite carbon material
CN108585916A (en) * 2018-07-19 2018-09-28 大同新成新材料股份有限公司 A kind of preparation method of graphite electrode nipple
CN109503168A (en) * 2018-10-08 2019-03-22 湖北捷地安电气有限公司 A kind of efficient discharge earthing module
CN113912397A (en) * 2021-09-17 2022-01-11 大同新成新材料股份有限公司 Method for producing isostatic graphite product by using isostatic pressing roasting waste products
CN113929460A (en) * 2021-09-17 2022-01-14 大同新成新材料股份有限公司 Preparation method of isostatic pressing graphite material
CN113929461A (en) * 2021-09-17 2022-01-14 大同新成新材料股份有限公司 Preparation method of isotropic carbon material
CN114014659A (en) * 2021-11-05 2022-02-08 新疆农六师碳素有限公司 Novel high-end carbon product material for aluminum and preparation method thereof
CN115215655A (en) * 2022-08-09 2022-10-21 中钢集团南京新材料研究院有限公司 Kneading method of isostatic pressing graphite product and product thereof

Similar Documents

Publication Publication Date Title
CN107986786A (en) A kind of graphite product and production method
CN107840328B (en) A kind of isostatic pressing formed graphite and its production method
CN101980583B (en) Method for preparing graphite electrode of quartz crucible
CN102838108B (en) Minor-structure high-density graphite product and preparation method thereof
CN102898142B (en) Preparation method for die graphite material used for electrical discharge machining
CN104529450B (en) A kind of forming method of big specification isostatic pressing formed graphite goods
CN102173409B (en) Preparation method for graphite carbon material
CN104386670A (en) Isostatic-pressure high-purity graphite material and preparation method thereof
CN102249237B (en) Graphite crucible
CN105645397B (en) It is a kind of for hyperfine structure graphite of EDM and preparation method thereof
CN108911750B (en) A kind of preparation method of resistance to ablation carbon graphite material
CN102951634A (en) Oversized isostatic pressing graphite and production method thereof
CN102268697B (en) Graphite anode for magnesium electrolysis and preparation method thereof
CN102364988A (en) Manufacturing method of graphite electrode with phi 700mm ultra high power used in alternating-current (ac) electric arc furnace
CN110615680B (en) Graphite electrode with GHP phi 960-phi 1420mm super-large specification and production method thereof
CN108640681A (en) A kind of preparation method of special graphite carbon material
CN105967718A (en) Graphite anode for heavy current resistant magnesium electrolysis and preparation process thereof
CN108083803A (en) A kind of preparation method and graphite product of mold compression moulding graphite product
CN107857261A (en) A kind of preparation method of nuclear graphite materials
CN107162597A (en) A kind of formula of moulding by casting silicon nitride products based on silicon carbide and preparation method thereof
CN105837217B (en) Elema and preparation method thereof
CN111087249A (en) Graphite porous crucible and preparation method thereof
CN112266248A (en) Method for preparing graphite crucible by using low-quality graphite raw material
CN104828809A (en) Processing method for extrusion molded medium size structure graphite material
CN104477891B (en) A kind of method for graphitizing of isostatic pressing formed graphite goods

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

Application publication date: 20180504

RJ01 Rejection of invention patent application after publication