GB/T 1427-2016 English PDF (GBT1427-2016)

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GB/T 1427-2016: Sample method of carbon material
GB/T 1427-2016
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 29.050
Q 50
Replacing GB/T 1427-2000
Sample method of carbon material
ISSUED ON. JUNE 14, 2016
IMPLEMENTED ON. MAY 01, 2017
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of the People's Republic of China;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword ... 4
1 Scope ... 6
2 Normative references ... 6
3 Graphite electrodes and joints (including general power, impregnation, high
power, ultra-high power), graphite electrode roasting products ... 6
4 Graphite anodes ... 7
5 Graphite blocks ... 8
6 Cathode carbon blocks for aluminum electrolysis cells ... 9
7 Carbon electrodes ... 10
8 Electric furnace carbon blocks, self-baking carbon blocks, blast furnace
carbon blocks ... 10
9 Carbon resistance rods ... 11
10 Carbon paste (electrode paste, anode paste, cathode paste, carbon
ramming materials) ... 12
11 Carbon cement, carbon mud ... 12
12 High purity graphite products ... 13
13 Isostatic graphite ... 13
14 Carbon substrates for solar power generation ... 14
15 Fine-particle high-density special graphite products ... 14
16 Mesophase carbon microspheres, soft carbon, hard carbon ... 15
17 Spherical graphite ... 16
18 Graphite anode materials, carbon composite lithium iron phosphate cathode
materials, lithium titanate and carbon composite anode materials, etc... 16
19 Other specifications ... 17
Foreword
This Standard is drafted in accordance with the rules given in GB/T 1.1-2009.
This Standard replaces GB/T 1427-2000 “Sample method of carbon material”.
Compared with GB/T 1427-2000, the main technical content changes of this
Standard are as follows.
- ADD the normative references (see Clause 2);
- MODIFY the sampling requirements for graphite electrodes and joints (see
3.2, 3.3, 3.4);
- MODIFY the sampling requirements for graphite blocks (see 5.2);
- MODIFY the sampling requirements for cathode carbon blocks for
aluminum electrolysis cells (see 6.1, 6.2, 6.3, 6.4);
- MODIFY the sampling requirements for electric furnace carbon blocks, self-
baking carbon blocks and blast furnace carbon blocks (see 8.1, 8.3, 8.4);
- MODIFY the sampling batch requirements for carbon resistance rods (see
9.1);
- MODIFY the type and the sampling batch requirements for charcoal paste
(see Clause 10);
- ADD the sampling requirements for carbon cement and carbon mud (see
Clause 11);
- ADD the sampling requirements for isostatic graphite (see Clause 13);
- ADD the sampling requirements for carbon substrates for solar power
generation (see Clause 14);
- ADD the sampling requirements for fine-particle high-density special
graphite products (see Clause 15);
- ADD the sampling requirements for mesophase carbon microspheres, soft
carbon, hard carbon (see Clause 16);
- ADD the sampling requirements for spherical graphite (see Clause 17);
- ADD the sampling requirements for graphite anode materials, carbon
composite lithium iron phosphate cathode materials, lithium titanate and
carbon composite anode materials (see Clause 18);
Sample method of carbon material
1 Scope
This Standard specifies the sampling tool, sampling position, sampling quantity
and specimen size and precision of carbon materials.
This Standard is applicable to the taking and preparation of carbon material
samples such as graphite electrodes, graphite anodes, graphite blocks,
cathode carbon blocks, carbon electrodes, electric furnace carbon blocks,
carbon paste, high-purity graphite products, mesophase carbon microspheres.
2 Normative references
The following referenced documents are indispensable for the application of
this document. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any
amendments) applies.
GB/T 13732 General rules for sampling inspection of bulk materials with
uniform size
3 Graphite electrodes and joints (including general
power, impregnation, high power, ultra-high power),
graphite electrode roasting products
3.1 Sampling batch
If the output of graphitized products per furnace is greater than or equal to 30 t,
the quantity of sampling electrodes is not less than 4 pieces. If it is less than 30
t, the quantity of sampling electrodes is not less than 3 pieces.
NOTE. Samples are uniformly taken in different parts (top, middle and bottom of the furnace)
of the graphitization furnace.
3.2 Sampling tool
Hollow drill bits with an inner diameter of not less than 35 mm and a length of
250 mm, or other tools that guarantee the requirements of the specimen.
120 mm at the center of the two end faces of each graphite block. CUT OFF 60
mm from the outer end, and the remaining portion is used for specimen
preparation.
5.4 Specimen size and precision
The cylinders are processed into specimens of (40 ± 0.1) mm × (40 ± 0.1) mm
× (40 ± 0.1) mm or φ(45 ± 0.1) mm × (40 ± 0.1) mm.
5.5 Sample appearance
The corners are intact and there are no visible cracks or flaws.
6 Cathode carbon blocks for aluminum electrolysis
cells
6.1 Sampling batch
Every 100 t is one batch. Those less than 100 t are regarded as 100 t. The
sampling quantity per batch is not less than 3 pieces. 2 cylinders are drilled in
each block.
6.2 Sampling tool
Hollow drill bits with an inner diameter of not less than 65 mm and a length of
not less than 150 mm or other tools.
6.3 Sampling position and method
The sampling position of carbon blocks without dovetail groove is the portion
where the dovetail groove is to be machined. The sample is taken perpendicular
to the direction intended to be used as the working surface. The center of
sampling is 200 mm from the end of the carbon block.
The sampling position of carbon blocks with dovetail groove is on the dovetail
groove 200 mm from the end, perpendicular to the working surface.
6.4 Specimen size and precision
The size and precision of the specimen shall be determined in accordance with
the requirements of the tested item. However, the minimum size (usually the
diameter) of the specimen is at least 3 times the maximum particle size of the
dry aggregate.
According to the test method corresponding to the tested item, it is ensured that
the specimen taken from the carbon block has an appropriate size.
9.2 Sampling tool
Saws or machine tools.
9.3 Sampling position and method
Respectively CUT OUT cylinders with a length of 100 mm at a distance of 50
mm ~ 60 mm from the top and bottom ends of the product.
9.4 Specimen size and precision
The cylinders are processed into specimens of (40 ± 0.1) mm × (40 ± 0.1) mm
× (40 ± 0.1) mm or φ(45 ± 0.1) mm × (40 ± 0.1) mm. There are not less than 8
specimens per batch. It shall indicate the pressurization direction.
9.5 Sample appearance
The corners are intact and there are no visible cracks or flaws.
10 Carbon paste (electrode paste, anode paste,
cathode paste, carbon ramming materials)
10.1 Sampling batch
For electrode paste, anode paste and cathode paste, every 500 t is one batch,
and those less than 500 t are regarded as 500 t. For carbon ramming materials,
every 100 t is one batch, and those less than 100 t are regarded as 100 t.
10.2 Specimen preparation
The number of subsamples sampled from each batch of carbon paste s...