CN102502602A - Large-specification fine-grain isotropic isostatic-pressing graphite - Google Patents
Large-specification fine-grain isotropic isostatic-pressing graphite Download PDFInfo
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- CN102502602A CN102502602A CN2011103398318A CN201110339831A CN102502602A CN 102502602 A CN102502602 A CN 102502602A CN 2011103398318 A CN2011103398318 A CN 2011103398318A CN 201110339831 A CN201110339831 A CN 201110339831A CN 102502602 A CN102502602 A CN 102502602A
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Abstract
The invention discloses large-specification fine-grain isotropic isostatic-pressing high-purity graphite mainly composed of components of, by weight: 52-65 parts of material powder, and 35-48 parts of modified pitch. The material powder is composed of components of, by weight: 75-94 parts of prefabricated crushed coke powder, 2-18 parts of graphite powder, and 2-8 parts of an additive. The prefabricated crushed coke powder is composed of components of, by weight: 52-65 parts of prefabricated material powder, and 35-48 parts of modified pitch. The prefabricated material powder is composed of components of, by weight: 52-85 parts of petroleum coke, 2-20 parts of graphite powder, 6-45 parts of a carburant, and 3-12 parts of fine powder. The production specification of the graphite is large. According to the invention, production of graphite with a large-specification of phi900 can be realized. The graphite is advantaged in high strength, high density, good elasticity, excellent mechanical properties, and excellent physical chemical index. The graphite material is advantaged in low porosity, good quality, uniform and delicate structure, and relatively high volume density.
Description
Technical field
The present invention relates to a kind of big specification fine particle isotropy isostatic pressing formed graphite.
Background technology
The isostatic pressing formed graphite material has favorable conductive, heat conductivility; Have simultaneously high temperature strength and corrosion resistance and good, self-lubricating, volume density high, be easy to a series of characteristics such as skilled worker; And closely link to each other with current high-tech cutting edge technology; Obtained using widely in department such as national economy chemical industry, space flight and nuclear energy and industry, particularly in various nuclear fusion devices, adopted.Existing graphite production industry generally believes with the Graphite Powder 99 to be that the graphite material intensity of feedstock production is lower, can't satisfy the high request to working strength, adopts materials such as refinery coke and pitch coke to replace the Graphite Powder 99s use.
Existing isostatic pressing formed graphite material has following shortcoming: (1) production specification is less, can not realize the production of big specification graphite products; (2) intensity, density and elastic performance are poor, and the mechanical property physical and chemical index is undesirable; (3) void content is higher in the graphite material, influences material quality; (4) the constituent structure particle diameter is more coarse, and is inhomogeneous and volume density is lower.
Summary of the invention
The objective of the invention is to solve the deficiency of existing isostatic pressing formed graphite material, a kind of novel big specification fine particle isotropy isostatic pressing formed graphite is provided, it is less to overcome conventional graphite material produce specification, can not realize the production of big specification graphite products; Intensity, density and elastic performance are poor, and the mechanical property physical and chemical index is undesirable; Void content is higher in the graphite material, influences material quality; Shortcomings such as the constituent structure particle diameter is more coarse, and inhomogeneous and volume density is lower.
The objective of the invention is to realize through following technical scheme: big specification fine particle isotropy isostatic pressing formed graphite, it mainly is made up of following components in part by weight:
Material powder 52～65
Modified pitch 35～48;
Wherein, described material powder is made up of following components in part by weight:
Prefabricated broken coke powder 75～94
Graphite Powder 99 2～18
Additive 2～8;
Described prefabricated broken coke powder is made up of following components in part by weight:
Prefabricated material powder 52～65
Modified pitch 35～48;
Described prefabricated material powder is made up of following components in part by weight:
Refinery coke 52～85
Graphite Powder 99 2～20
Carburelant 6～45
The invention has the beneficial effects as follows: (1) production specification is big, can realize the production of ￠ 900 big specification graphite products; (2) intensity, density and elastic performance are good, and the mechanical property physical and chemical index is good; (3) void content is low in the graphite material, and material quality is good; (4) even structure exquisiteness and volume density are higher.
Description of drawings
The indication range table of isostatic pressing formed graphite product in operation that Fig. 1 is produced in different production formula ratios for the present invention;
The isostatic pressing formed graphite finished product physical and chemical index scope table that Fig. 2 is produced in different production formula ratios for the present invention;
Fig. 3 is the performance physical and chemical index table of the greying finished-product material of production department of different embodiments of the invention formula rate institute.
Embodiment
Below in conjunction with accompanying drawing and embodiment technical scheme of the present invention is described in further detail:
[embodiment 1] big specification fine particle isotropy isostatic pressing formed graphite, it mainly is made up of following components in part by weight:
Material powder 52
Modified pitch 35;
Wherein, described material powder is made up of following components in part by weight:
Prefabricated broken coke powder 75
Graphite Powder 99 2
Additive 2;
Described prefabricated broken coke powder is made up of following components in part by weight:
Prefabricated material powder 52
Modified pitch 35;
Described prefabricated material powder is made up of following components in part by weight:
Refinery coke 55
Graphite Powder 99 16
Carburelant 26
[embodiment 2] big specification fine particle isotropy isostatic pressing formed graphite, it mainly is made up of following components in part by weight:
Material powder 65
Modified pitch 48;
Wherein, described material powder is made up of following components in part by weight:
Prefabricated broken coke powder 94
Graphite Powder 99 6
Additive 2;
Described prefabricated broken coke powder is made up of following components in part by weight:
Prefabricated material powder 65
Modified pitch 48;
Described prefabricated material powder is made up of following components in part by weight:
Graphite Powder 99 6
Carburelant 7
[embodiment 3] big specification fine particle isotropy isostatic pressing formed graphite, it mainly is made up of following components in part by weight:
Material powder 60
Modified pitch 40;
Wherein, described material powder is made up of following components in part by weight:
Prefabricated broken coke powder 85
Graphite Powder 99 10
Described prefabricated broken coke powder is made up of following components in part by weight:
Prefabricated material powder 60
Described prefabricated material powder is made up of following components in part by weight:
Graphite Powder 99 8
Carburelant 20
[embodiment 4] big specification fine particle isotropy isostatic pressing formed graphite, it mainly is made up of following components in part by weight:
Material powder 55
Wherein, described material powder is made up of following components in part by weight:
Prefabricated broken coke powder 80
Graphite Powder 99 15
Described prefabricated broken coke powder is made up of following components in part by weight:
Prefabricated material powder 55
Described prefabricated material powder is made up of following components in part by weight:
Refinery coke 60
Graphite Powder 99 10
Carburelant 20
Fine powder 10.
[embodiment 5] big specification fine particle isotropy isostatic pressing formed graphite, it mainly is made up of following components in part by weight:
Material powder 63
Modified pitch 37;
Wherein, described material powder is made up of following components in part by weight:
Prefabricated broken coke powder 90
Graphite Powder 99 5
Described prefabricated broken coke powder is made up of following components in part by weight:
Prefabricated material powder 60
Described prefabricated material powder is made up of following components in part by weight:
Refinery coke 75
Graphite Powder 99 5
Among the above embodiment; Fine powder is meant that used solid material uses the collected median size of sack cleaner when abrasive dust be the ultrafine powder ash material of 1～4um; The median size of refinery coke, carburelant and Graphite Powder 99 all is 4～20um, has effectively guaranteed the particle diameter of final graphite products.
Additive is one or more above arbitrary combination wherein such as boric acid, microsphere and thomel.
Produce in above different production formula ratios, isostatic pressing formed graphite product indication range in operation of being produced is as shown in Figure 1; Produce in above different production formula ratios, the isostatic pressing formed graphite finished product physical and chemical index scope of being produced is as shown in Figure 2; Different ingredients to each embodiment is produced, and performance physical and chemical index analytical test is carried out in final greying finished-product material sampling, and test result is as shown in Figure 3.
Claims (1)
1. big specification fine particle isotropy isostatic pressing formed graphite, it is characterized in that: it mainly is made up of following components in part by weight:
Material powder 52～65
Modified pitch 35～48;
Wherein, described material powder is made up of following components in part by weight:
Prefabricated broken coke powder 75～94
Graphite Powder 99 2～18
Additive 2～8;
Described prefabricated broken coke powder is made up of following components in part by weight:
Prefabricated material powder 52～65
Modified pitch 35～48;
Described prefabricated material powder is made up of following components in part by weight:
Refinery coke 52～85
Graphite Powder 99 2～20
Carburelant 6～45
Fine powder 3～12.
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| CN2011103398318A CN102502602A (en) | 2011-11-01 | 2011-11-01 | Large-specification fine-grain isotropic isostatic-pressing graphite |
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| CN2011103398318A CN102502602A (en) | 2011-11-01 | 2011-11-01 | Large-specification fine-grain isotropic isostatic-pressing graphite |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101654239A (en) * | 2009-08-27 | 2010-02-24 | 清华大学 | Isotropic graphite product and preparation method thereof |
| CN101823707A (en) * | 2010-04-28 | 2010-09-08 | 四川广汉士达炭素股份有限公司 | Technical method for producing isostatic pressure graphite |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101654239A (en) * | 2009-08-27 | 2010-02-24 | 清华大学 | Isotropic graphite product and preparation method thereof |
| CN101823707A (en) * | 2010-04-28 | 2010-09-08 | 四川广汉士达炭素股份有限公司 | Technical method for producing isostatic pressure graphite |
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Application publication date: 20120620 |