CN105217610A - A kind of spherical graphite production technique - Google Patents
A kind of spherical graphite production technique Download PDFInfo
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- CN105217610A CN105217610A CN201510602734.1A CN201510602734A CN105217610A CN 105217610 A CN105217610 A CN 105217610A CN 201510602734 A CN201510602734 A CN 201510602734A CN 105217610 A CN105217610 A CN 105217610A
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Abstract
A kind of spherical graphite production technique, step is as follows, comprising: (1) reclaims, storage: be stored in by the waste and old graphite reclaimed in graphite bunker and deliver to manufacture across in coarse crushing section high hopper by pneumatic conveyer; (2) classification: practical pulverizing mill carries out classification after pulverizing; (3) magnetic separation: magnetic separation be pulverizing mill formed particle by airtight conveyor process, the magnetic such as the iron and steel of graphite are mingled with absorption by the magnetic field utilizing magnetic separator to produce; (4) high temperature purification: after purifying furnace high temperature purification, can become high pure spherical graphite; (5) disperse, pack: ready-made spherical graphite is disperseed, packs; Advantage of the present invention is: this production technique adopts waste and old graphite to be starting material, has saved material, and reduce production cost, the graphite purity made is high, and reliable operation is easy to operate, and technique makes simple, almost pollution-free, very little to environmental hazard, does not waste resource.
Description
Technical field
The present invention relates to chemical technology field, especially relate to a kind of spherical graphite production technique.
Background technology
Graphite is a kind of allotropic substance of elemental carbon, the periphery of each carbon atom link other three carbon atom arrangement modes be cellular multiple hexagons with covalent bonds, form covalent molecule.Because each carbon atom all can release an electronics, those electronics can move freely, and therefore graphite belongs to electrical conductor.Graphite is wherein the softest a kind of mineral, and its purposes comprises and manufactures pencil-lead and lubricant.
Spheroidal graphite materials has good electroconductibility, and degree of crystallinity is high, and cost is low, theoretical embedding lithium capacity is high, low and the feature such as smooth of charge and discharge potential, being at present as lithium ion battery negative material integral part, is the regeneration product of domestic and international lithium ion battery production negative material.Have excellent electroconductibility and chemical stability, charge/discharge capacity is high, has extended cycle life, environmental protection, and be that the graphite treatment processing method after graphite Shen Chan enterprise and power plant use is complicated now, the graphite purity of producing afterwards in utilization is low.
Summary of the invention
For overcoming the problems referred to above, the present invention adopts following technical scheme:
A kind of spherical graphite production technique, step is as follows, comprising:
(1) reclaim, store: be stored in graphite bunker by the waste and old graphite reclaimed, graphite bunker temperature is 16-22 degree Celsius, delivered to by pneumatic conveyer and manufacture across in coarse crushing section high hopper;
(2) classification: the main frame electric current of pulverizing mill is 76-80 ampere, and compressor flow is 52-55 cubic meters per minute, the analytical engine rotating speed of pulverizing mill is 600-6200 rev/min; Eddy current type air classifier is used to carry out classification to silicon-carbide particle, when the grading wheel rotating speed of eddy current type grading machine is 2600-3000 rev/min, the particle that particle diameter is not more than 5.5 microns can be obtained, then the compressor flow of eddy current type air classifier is adjusted to 26-30 cubic meters per minute, the grading wheel rotating speed of eddy current type grading machine is 1800-2000 rev/min, carries out classification;
(3) magnetic separation: magnetic separation be pulverizing mill formed particle by airtight conveyor process, the magnetic such as the iron and steel of graphite are mingled with absorption by the magnetic field utilizing magnetic separator to produce;
(4) high temperature purification: after purifying furnace high temperature purification, can become high pure spherical graphite;
(5) disperse, pack: ready-made spherical graphite is disperseed, packs.
Preferably, in described step (1), the area of graphite bunker is 60-80m
3, space is excessive, and after piling up, internal temperature is too high, and easily cause danger, space is too small, and store content is few, can not meet Production requirement.
Preferably, the main frame optimum current of described step (2) pulverizing mill is 88 amperes, and compressor flow is 54 cubic meters per minute, and the analytical engine rotating speed of pulverizing mill is 3000 revs/min; Eddy current type air classifier is used to carry out classification to silicon-carbide particle, when the grading wheel rotating speed of eddy current type grading machine is 2800 revs/min, the particle that particle diameter is not more than 5.5 microns can be obtained, then the compressor flow of eddy current type air classifier is adjusted to 28 cubic meters per minute, the grading wheel rotating speed of eddy current type grading machine is 1900 revs/min, carries out classification;
Preferably, in described step (3), magnetic separator adopts magnetic induction 400mT totally 2, and cost is low, save energy.
Preferably, Graphite Powder 99 directly loads in purifying furnace by described step (4), in the purifying furnace passing into rare gas element and freonll-11 shielding gas, be heated to 2800-2900 DEG C; keep 40 minutes; impurity in graphite can overflow, thus realizes the purification of graphite, and graphite purity is 99.99%.
Preferably, the spheroidal particle mass specific area SSA=S/V=5/7ds obtained in described step (5).
Advantage of the present invention is: this production technique adopts waste and old graphite to be starting material, has saved material, and reduce production cost, the graphite purity made is high, purity is 99.99%, and reliable operation is easy to operate, and technique makes simple, almost pollution-free, very little to environmental hazard, do not waste resource.
Embodiment
A kind of spherical graphite production technique, step is as follows, comprising:
(1) reclaim, store: be stored in graphite bunker by the waste and old graphite reclaimed, the area of graphite bunker is 60-80m
3, graphite bunker temperature is 16-22 degree Celsius, is delivered to manufacture across in coarse crushing section high hopper by pneumatic conveyer;
(2) classification: the main frame electric current of pulverizing mill is 76-80 ampere, and compressor flow is 52-55 cubic meters per minute, the analytical engine rotating speed of pulverizing mill is 600-6200 rev/min; Eddy current type air classifier is used to carry out classification to silicon-carbide particle, when the grading wheel rotating speed of eddy current type grading machine is 2600-3000 rev/min, the particle that particle diameter is not more than 5.5 microns can be obtained, then the compressor flow of eddy current type air classifier is adjusted to 26-30 cubic meters per minute, the grading wheel rotating speed of eddy current type grading machine is 1800-2000 rev/min, carries out classification;
(3) magnetic separation: magnetic separation be pulverizing mill formed particle by airtight conveyor process, the magnetic such as the iron and steel of graphite are mingled with absorption by the magnetic field utilizing the magnetic separator of 2 magnetic induction 400mT to produce;
(4) high temperature purification: Graphite Powder 99 is directly loaded in purifying furnace, 2800-2900 DEG C is heated in the purifying furnace passing into rare gas element and freonll-11 shielding gas, keep 40 minutes, impurity in graphite can overflow, thus realize the purification of graphite, graphite purity is 99.99%, then makes high pure spherical graphite;
(5) disperse, pack: the spherical graphite of ready-made spheroidal particle mass specific area SSA=S/V=5/7ds is disperseed, packs.
Embodiment 1
A kind of spherical graphite production technique, step is as follows, comprising:
(1) reclaim, store: be stored in graphite bunker by the waste and old graphite reclaimed, the area of graphite bunker is 70m
3, graphite bunker temperature is 18 degrees Celsius, is delivered to manufacture across in coarse crushing section high hopper by pneumatic conveyer;
(2) classification: the main frame optimum current of pulverizing mill is 88 amperes, and compressor flow is 54 cubic meters per minute, the analytical engine rotating speed of pulverizing mill is 3000 revs/min; Eddy current type air classifier is used to carry out classification to silicon-carbide particle, when the grading wheel rotating speed of eddy current type grading machine is 2800 revs/min, the particle that particle diameter is not more than 5.5 microns can be obtained, then the compressor flow of eddy current type air classifier is adjusted to 28 cubic meters per minute, the grading wheel rotating speed of eddy current type grading machine is 1900 revs/min, carries out classification;
(3) magnetic separation: magnetic separation be pulverizing mill formed particle by airtight conveyor process, the magnetic such as the iron and steel of graphite are mingled with absorption by the magnetic field utilizing the magnetic separator of 2 magnetic induction 400mT to produce;
(4) high temperature purification: Graphite Powder 99 is directly loaded in purifying furnace, 2800 DEG C are heated in the purifying furnace passing into rare gas element and freonll-11 shielding gas, keep 40 minutes, impurity in graphite can overflow, thus realize the purification of graphite, graphite purity is 99.99%, then makes high pure spherical graphite;
(5) disperse, pack: the spherical graphite of ready-made spheroidal particle mass specific area SSA=S/V=5/7ds is disperseed, packs.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of described claim.
Claims (6)
1. a spherical graphite production technique, is characterized in that step is as follows, comprising:
(1) reclaim, store: be stored in graphite bunker by the waste and old graphite reclaimed, graphite bunker temperature is 16-22 degree Celsius, delivered to by pneumatic conveyer and manufacture across in coarse crushing section high hopper;
(2) classification: the main frame electric current of pulverizing mill is 76-80 ampere, and compressor flow is 52-55 cubic meters per minute, the analytical engine rotating speed of pulverizing mill is 600-6200 rev/min; Eddy current type air classifier is used to carry out classification to silicon-carbide particle, when the grading wheel rotating speed of eddy current type grading machine is 2600-3000 rev/min, the particle that particle diameter is not more than 5.5 microns can be obtained, then the compressor flow of eddy current type air classifier is adjusted to 26-30 cubic meters per minute, the grading wheel rotating speed of eddy current type grading machine is 1800-2000 rev/min, carries out classification;
(3) magnetic separation: magnetic separation be pulverizing mill formed particle by airtight conveyor process, the magnetic such as the iron and steel of graphite are mingled with absorption by the magnetic field utilizing magnetic separator to produce;
(4) high temperature purification: after purifying furnace high temperature purification, makes high pure spherical graphite;
(5) disperse, pack: ready-made spherical graphite is disperseed, packs.
2. a kind of spherical graphite production technique according to claim 1, is characterized in that: in described step (1), the area of graphite bunker is 60-80m
3.
3. a kind of spherical graphite production technique according to claim 1, is characterized in that: the main frame optimum current of described step (2) pulverizing mill is 88 amperes, and compressor flow is 54 cubic meters per minute, and the analytical engine rotating speed of pulverizing mill is 3000 revs/min; Eddy current type air classifier is used to carry out classification to silicon-carbide particle, when the grading wheel rotating speed of eddy current type grading machine is 2800 revs/min, the particle that particle diameter is not more than 5.5 microns can be obtained, then the compressor flow of eddy current type air classifier is adjusted to 28 cubic meters per minute, the grading wheel rotating speed of eddy current type grading machine is 1900 revs/min, carries out classification.
4. a kind of spherical graphite production technique according to claim 1, is characterized in that: in described step (3), magnetic separator adopts magnetic induction 400mT totally 2.
5. a kind of spherical graphite production technique according to claim 1; it is characterized in that: Graphite Powder 99 directly loads in purifying furnace by described step (4); in the purifying furnace passing into rare gas element and freonll-11 shielding gas, be heated to 2800-2900 DEG C, keep 40 minutes.
6. a kind of spherical graphite production technique according to claim 1, is characterized in that: the spheroidal particle mass specific area SSA=S/V=5/7ds obtained in described step (5).
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107785631A (en) * | 2017-09-14 | 2018-03-09 | 河南易成新能源股份有限公司 | The recovery method of graphite cathode material |
| CN109775700A (en) * | 2019-02-13 | 2019-05-21 | 山东天岳先进材料科技有限公司 | The recycling of waste and old graphite crucible and high-purity carbon dust |
| CN112408382A (en) * | 2020-11-19 | 2021-02-26 | 萝北瑞喆烯碳新材料有限公司 | Preparation method of high-sphericity graphite powder |
| CN115924907A (en) * | 2022-12-21 | 2023-04-07 | 江苏金亚隆科技有限公司 | Physical purification process of graphite raw material |
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| CN1730157A (en) * | 2005-08-03 | 2006-02-08 | 连云港市研磨厂 | Technique for producing silicon carbide miropowder |
| CN101367518A (en) * | 2008-09-24 | 2009-02-18 | 青岛恒胜石墨有限公司 | Method for preparing natural spherical plumbago with circular reshaping classification |
| CN101850966A (en) * | 2009-11-27 | 2010-10-06 | 洛阳市冠奇工贸有限责任公司 | Spherical graphite with median diameter of 6 to 14 mu m and preparation method thereof |
| CN102951633A (en) * | 2012-11-21 | 2013-03-06 | 芜湖浙鑫新能源有限公司 | Graphite spheroidization method and production system thereby |
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2015
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Patent Citations (4)
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| CN1730157A (en) * | 2005-08-03 | 2006-02-08 | 连云港市研磨厂 | Technique for producing silicon carbide miropowder |
| CN101367518A (en) * | 2008-09-24 | 2009-02-18 | 青岛恒胜石墨有限公司 | Method for preparing natural spherical plumbago with circular reshaping classification |
| CN101850966A (en) * | 2009-11-27 | 2010-10-06 | 洛阳市冠奇工贸有限责任公司 | Spherical graphite with median diameter of 6 to 14 mu m and preparation method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107785631A (en) * | 2017-09-14 | 2018-03-09 | 河南易成新能源股份有限公司 | The recovery method of graphite cathode material |
| CN109775700A (en) * | 2019-02-13 | 2019-05-21 | 山东天岳先进材料科技有限公司 | The recycling of waste and old graphite crucible and high-purity carbon dust |
| CN112408382A (en) * | 2020-11-19 | 2021-02-26 | 萝北瑞喆烯碳新材料有限公司 | Preparation method of high-sphericity graphite powder |
| CN115924907A (en) * | 2022-12-21 | 2023-04-07 | 江苏金亚隆科技有限公司 | Physical purification process of graphite raw material |
| CN115924907B (en) * | 2022-12-21 | 2023-07-14 | 江苏金亚隆科技有限公司 | Physical purification process of graphite raw material |
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Application publication date: 20160106 |