Some standard content:
National Standard of the People's Republic of China
1 Subject content and scope of application
Flake graphite
This standard specifies the classification, grade, technical requirements, test methods and inspection rules of flake graphite. This standard applies to the quality inspection and acceptance of flake graphite. 2 Reference standards
GB/T3520 Graphite fineness inspection method
·GB/T3521 Graphite chemical analysis method
3 Terminology
GB/T 3518-95
Replace GB3518-83
Flake graphite: natural crystalline graphite, which is shaped like fish scales, belongs to the hexagonal crystal system, has a layered structure, and has good high temperature resistance, electrical conductivity, thermal conductivity, lubrication, plasticity and acid and alkali resistance. See the schematic diagram for the crystal structure. 1.42A
Graphite crystal structure diagram
4 Product classification, brand
4.1 Product classification
Flake graphite is divided into four categories according to the fixed carbon content: high-purity graphite, high-carbon graphite, medium-carbon graphite, and low-carbon graphite. The fixed carbon range and code are shown in Table 1.
Fixed carbon C (%)
4.2Product brand
High purity graphite
Approved by the State Administration of Technical Supervision on February 7, 1995High carbon graphite
94.0≤C<99.9
Medium carbon graphite
80.0≤C<94.0
Low carbon graphite
50.0C<80.0
Implemented on October 1, 1995
GB/T 3518—95
See Table 3 to Table 6 for all product brands. The product brand is composed of classification code, particle size, and fixed carbon in sequence, as shown in Table 2. Table 2
Product brand
LC300-99.9
LG180-95
LZ(—)150-90
LD(—)75-70
5Technical requirements
High purity graphite
Particle size 300μm
Fixed carbon 99.9%
High carbon graphite
Medium carbon graphite
Low carbon graphite
Particle size 180μm
Particle size 150pam
Particle size 75μm
Fixed carbon 95%
Fixed carbon 90%
Fixed carbon 70%
The technical requirements for flake graphite shall comply with the provisions of Tables 3 to 6. If there are special requirements, the supply and demand parties shall negotiate together. 6 Test methods
6.1 Fineness determination shall be carried out according to GB/T3520 method. 6.2 Fixed carbon, volatile matter and moisture shall be carried out according to GB/T3521 method. 7 Inspection rules
7.1 Batch
The same brand of bagged flake graphite delivered at one time is 60t as a batch, and less than 60t is still calculated as a batch. 7.2 Sampling
Bagged flake graphite is sampled according to the systematic sampling method, that is, each bag in a batch of products is arranged in a certain order, and a bag is randomly selected from 1 to n bags of products for sampling, and then a bag is sampled every n-1 bags, and the sampling amount in each bag is the same. The samples taken are combined and mixed as the samples of the batch of products.
n is calculated as follows:
n=N/100
Where: N——the number of bags in each batch of products, the number of bags represented by each sampling bag.
When the calculated n contains decimals, the decimal part should be discarded. When N≤100, samples should be taken from each bag. When sampling, insert the sampling rod into the bag to extract. The sampling volume of each batch shall not be less than 1kg. 7.3 Sample preparation
Pour the obtained sample on paper and mix it by tumbling method (at least 15 times). Divide it into two parts by quartering method, one for test and one for preparation.
7.4 Determination of original quality
7.4.1 Products that meet all technical indicators in Tables 3 to 6 are qualified products. If one indicator does not meet the standard requirements, double sampling should be taken from the sampling bags of the same batch of products for re-inspection, and the re-inspection results shall be used as the final results. 7.4.2 If the receiving party has any objection to the quality of the product within two months after receiving the product, it shall re-inspect the product with the backup sample. If there is still a dispute, the superior quality supervision department shall arbitrate.
8 Packaging, marking, transportation, storage
8.1 The packaging should be firm and neat, with a net weight of 20±0.20kg, 25±0.20kg, 1000±10kg per bag. 8.2 The marking should be clear, and the packaging bag should have the trademark, production unit, product brand, production date, and net weight. 8.3 Each batch of products should have a certificate of conformity. The certificate of conformity should indicate the product name, manufacturer name, trademark, product code, implementation standard, inspection results, 28
GB/T3518—95
batch number or factory date, batch size, inspector number and inspection department seal. 8.4 During transportation and storage, the package should be protected from rain, moisture and breakage. Table 3 Technical indicators of high purity graphite
LC300-99.99
LC(-)150-99. 99
LC(--)75-99. 99
LC(—)45-99.99
LC500-99.9
LC300-99.9
LC180-99.9
LC(-)150-99. 9
LC(--)75-99. 9
LC(-)45-99.9
LG500-99
LG300-99
LG180-99
LC150-99
LG125-99
LG100-99| |tt||LG(-)150-99||tt ||LG(-)125-99
LG(-)100-99
LG()75-99
LG(—)45-99
LG500 -98
LG300-98
LG180-98||t t||LG150-98
LG125-98
LG100-98
Fixed carbon
not less than
not greater than
Table 4 High carbon graphite technical indicators
Solid ingot carbon
Not less than
Volatile matter
Not more than
Not more than
Sieve residue| |tt||Sieve residue
Main purpose
Flexible graphite sealing material
Replace platinum crucible, used for melting chemical reagents
Flexible graphite Sealing material||tt ||Lubricant base material
Main purpose
Filling material
Lubricant
Base material, coating
LG(—)150-98|| tt||LG(—)125-98
LG(一)100-98
LG(—)75-98
LG(-)45-98||tt| |LG500-97
LG300-97
LG180-97
LG150-97
LG125-97
LG100-97
LG(—)150-97
LG(—)125-97
LG(—)100-97
LG(—)75-97|| tt||LG(—)45-97
LC500-96
LG3 00-96
LG180-96
LG150-96
LG125-96
LG100-96
LG(—)150-96||tt ||LG(—)125-96
LG(-)1 00-96
LG()75-96
LG(—)45-96
LG500-95
LG300-95
LG180-95
LG150-95
LG125-95
LG100-95
Fixed carbon
Not less than
GB/T3518—95|| tt||Continued Table 4
Volatile matter
Not more than
Not more than
Sieve residue
Main purpose||t t||Lubricant
Base material, coating
Lubricant base material,
Brush raw materials
Refractory materials,
Electric carbon products,| |tt||Battery raw materials,
Pencil raw materials
Electrical carbon products
LG(—)150-95
LG(—)125-95||tt| |LG(—)100-95
LG(-)75-95
LG(—)45-95
LG500-94
LG300-94|| tt||LG18 0-94
LG150-94
LG125-94
LG100-94
LG(--)150-94
LG(—)125 -94
LG(—)100-94
LG (—)75-94
LG()45-94
LZ500-93
LZ300-93
LZ180-93
LZ150-93| |tt||LZ125-93
LZ100-93
LZ(—)150-93
LZ(—)125-93
LZ(—)100—93
LZ(—)75-93|| tt||LZ(—)45-93
LZ500-92
LZ300-92
LZ180-92
LZ150-92
LZ125-92
LZ100-92
Fixed carbon
Not less than
Fixed carbon
Not less than
GB/T 3518---95
Continued Table 4
Volatile matter
Not more than
Not more than
Table 5 Technical indicators of medium carbon graphite||tt| |Volatile matter
Not more than
Not more than
Sieve residue
Sieve residue
Main use
Refractory materials,|| tt||Electrical carbon products,
Battery raw materials,
Pencil raw materials
Electrical carbon products
Main uses||t t||Gan, refractory
Material, dye
LZ(—)150-92
LZ(--)125-92
LZ(—)100- 92
LZ(—)75-92
LZ(—)45-92
LZ500-91
L2300-91
LZ180-91| |tt||LZ150-91
LZ125-91
LZ10 0-91
LZ(-)150-91
LZ(—)125-91
LZ()100-91
LZ()75-91| |tt||LZ(—)45-91
LZ500-90
LZ300-90
LZ180-90
LZ150-90
LZ125-90
LZ100-90
LZ( )150 -90
LZ(-)125-90
LZ(—)100-90
LZ(--)75-90
LZ(—)45- 90
LZ500-89
LZ300-89
LZ180-89
LZ150-89
LZ125-89
LZ100-89| |tt||Fixed carbon
Not less than
GB/T 3518--95
Continued Table 5
Volatile matter
Not more than
Not more than
Sieve residue
Main purpose|| tt||Cruses, refractory
materials, dyes
refractory
raw materials for pencils,
raw materials for batteries
refractory
LZ( —)150-89
LZ(—)125-89
1L.Z(-)100-89
LZ()75-89
LZ(— )45-8 9
LZ()38-89
LZ500-88
LZ300-88
LZ180-88
LZ150-88
LZ125 -88
LZ100-88||tt ||LZ()150-88
LZ(-)125-88
LZ(--)100-88
LZ(-)75-88
LZ(—)45-88
LZ(-)38-88
IL.Z500-87
LZ300-87
LZ180-87
LZ150-87
LZ125-87
LZ1 00-87
LZ(--)150-87
LZ(—)125-87
LZ(—)100-87
LZ(—)75 -87
1.2(—)45-87
L2(—)38-87
L.Z500-86
LZ300-86
LZ180-86
L2150-86
LZ125-86
LZ100-86
Fixed carbon
Not less than
GB/T 3518--95
Continued Table 5
Volatile matter
Not more than
Not more than
Sieve residue
Main purpose|| tt||Raw materials for pencils,
Raw materials for batteries
Refractory materials
Raw materials for pencils,
Raw materials for batteries
Hanta,
Refractory materials
Casting coating
Refractory material
LZ()15 0-86
LZ()125-86
LZ()100-86
LZ(—)75-86
LZ(—)45-86| |tt||LZ500-85| |tt||LZ300-85
LZ180-85
LZ150-85
LZ125-85
LZ100-85
LZ(—)150- 85
LZ(—)125-85
LZ(—)100-85
LZ(—)75-85
LZ(—)45-85| |tt||LZ500-83| |tt||LZ300-83
LZ180-83
LZ150-83
LZ125-83
LZ100-83
LZ(--)150 -83
LZ(—)125-83
LZ(-)100-83
LZ(—)75-83
LZ(—)45-83
LZ500-80
LZ300-80
LZ180-80
LZ150-80
LZ125-80
Fixed Carbon||tt ||Not less than
GB/T 3518-95
Continued Table 5
Volatile matterbzxz.net
Not more than
Not more than
Sieve residue
Main purpose||tt ||Casting coating
Refractory materials
Casting materials
Refractory materials
Casting materials
Refractory materials||tt ||LZ100-80
LZ(--)150-80
Lz(—)125-80
LZ(—)100-80
LZ() 75-80
LZ(—)45-80
LD(—)150-75
LD(— )75-75
LD(—)150-70
LD(--)75-70
LD(—)150-65
LD()75 -65
LD(—)150-60
LD(—)75-60
LD()150-55
LD()75-55|| tt||LD(—)150-50
LD(—)75-50
Additional instructions:
Not less than
GB/T3518—95||tt ||Continued Table 5
Volatile matter
Not more than
This standard is proposed by the State Bureau of Building Materials Industry. This standard is under the jurisdiction of Shandong Nanshu Graphite Mine. Moisture
Not more than
Technical index of low carbon graphite
Fixed carbon
Not less than
Not more than
Sieve residue||tt ||Screen residue
This standard was drafted by Weiyang Nonmetallic Mineral Research Institute of State Building Materials Industry Bureau and Shandong Nanshu Graphite Mine. The main drafters of this standard are Wang Cailing, Zhao Youxing and Liu Ruiwei. Main purpose||tt ||Refractory materials
Casting materials
Main uses
Casting coatingsZ(—)45-83
LZ500-80
LZ300-80
LZ180-80
LZ150-80
LZ125-80
Fixed carbon
not less than
GB/T 3518-95
Continued Table 5
Volatile matter
Not more than
Not more than
Sieve residue
Main uses
Casting coating
Can crucible,
Refractory materials
Casting materials
Refractory materials
Casting materials
Refractory materials
LZ100-80
LZ(--)150-80
Lz(—)125-80
LZ(—)100-80
LZ()75-80
LZ(—)45-80
LD(—)150-75
LD(— )75-75
LD(—)150-70
LD(--)75-70
LD(—)150-65
LD()75-65
LD(—)150-60
LD(—)75-60
LD()150-55
LD()75-55
LD(—)150-50
LD(—)75-50
Additional instructions:
Not less than
GB/T3518—95
Continued Table 5
Volatile matter
Not more than
This standard is proposed by the State Bureau of Building Materials Industry. This standard is under the jurisdiction of Shandong Nanshu Graphite Mine. Moisture content
Not more than
Technical indexes of low carbon graphite
Fixed carbon
Not less than
Not more than
Sieve residue
Sieve residue
This standard was drafted by Weiyang Nonmetallic Mineral Research Institute of State Building Materials Industry Bureau and Shandong Nanshu Graphite Mine. The main drafters of this standard are Wang Cailing, Zhao Youxing and Liu Ruiwei. Main uses
Refractory materials
Casting materials
Main uses
Casting coatingsZ(—)45-83
LZ500-80
LZ300-80
LZ180-80
LZ150-80
LZ125-80
Fixed carbon
not less than
GB/T 3518-95
Continued Table 5
Volatile matter
Not more than
Not more than
Sieve residue
Main uses
Casting coating
Can crucible,
Refractory materials
Casting materials
Refractory materials
Casting materials
Refractory materials
LZ100-80
LZ(--)150-80
Lz(—)125-80
LZ(—)100-80
LZ()75-80
LZ(—)45-80
LD(—)150-75
LD(— )75-75
LD(—)150-70
LD(--)75-70
LD(—)150-65
LD()75-65
LD(—)150-60
LD(—)75-60
LD()150-55
LD()75-55
LD(—)150-50
LD(—)75-50
Additional instructions:
Not less than
GB/T3518—95
Continued Table 5
Volatile matter
Not more than
This standard is proposed by the State Bureau of Building Materials Industry. This standard is under the jurisdiction of Shandong Nanshu Graphite Mine. Moisture content
Not more than
Technical indexes of low carbon graphite
Fixed carbon
Not less than
Not more than
Sieve residue
Sieve residue
This standard was drafted by Weiyang Nonmetallic Mineral Research Institute of State Building Materials Industry Bureau and Shandong Nanshu Graphite Mine. The main drafters of this standard are Wang Cailing, Zhao Youxing and Liu Ruiwei. Main uses
Refractory materials
Casting materials
Main uses
Casting coatings
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