GB/T 1997-2008 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 1997-2008 | English | 85 |
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Coke -- Sampling and preparation of samples
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| GB/T 1997-1989 | English | 439 |
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Coke-sampling and preparation of samples
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GB/T 1997-2008: Coke -- Sampling and preparation of samples---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT1997-2008
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 75.160.10
H 32
Replacing GB/T 1997-1989
Coke - Sampling and preparation of samples
Issued on. DECEMBER 06, 2008
Implemented on. OCTOBER 01, 2009
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... 3
1 Scope... 4
2 Normative references... 4
3 Terms and definitions... 4
4 General... 5
5 Sampling... 7
6 Preparation of coke samples for industrial analysis... 11
Foreword
This Standard replaces GB/T 1997-1989 Coke - Sampling and Preparation of
Samples.
Compared with GB/T 1997-1989, this Standard has the following main
changes.
-- Revise the format of this Standard;
-- Revise the terms and definitions of this Standard and add English names;
-- Properly revise the safekeeping and reserve time of samples.
This Standard was proposed by China Iron and Steel Industry Association.
This Standard shall be under the jurisdiction of National Steel Standardization
Technical Committee.
Drafting organizations of this Standard. China Metallurgical Information and
Standardization Institute, Shougang Company Limited AND Sinosteel Anshan
Research Institute of Thermo-energy Co., Ltd.
Main drafters of this Standard. Sun Wei, Xi Wanze, Zhu Mingsan and Zhang
Jinying.
This Standard replaces the following previous standards.
- GB 1997-1980, GB/T 1997-1989.
Coke - Sampling and preparation of samples
1 Scope
This Standard specifies the terms and definitions in respect of sampling and
preparation of coke samples, the sampling place, house, equipment-tools, as
well as sampling and preparation of samples for industrial analysis and
physical properties test.
This Standard is applicable to the sampling and preparation of coke samples
for industrial analysis and physical properties test.
2 Normative references
The following standards contain the provisions which, through reference in this
Standard, constitute the provisions of this Standard. For dated references,
subsequent amendments (excluding corrections) or revisions do not apply to
this Standard. However, the parties who enter into agreement based on this
Standard are encouraged to investigate whether the latest versions of these
documents are applicable. For undated reference documents, the latest
versions apply to this Standard.
GB/T 2007.5 General rules for the sampling and sample preparation of
minerals in bulk - Experimental method for checking the bias of sampling
3 Terms and definitions
Terms and definitions determined in GB/T 9977 as well as the following ones
apply to this Standard.
3.1 Lot and batch
Coke of same specification at same delivery shall be deemed as one lot, and
the mass of one lot of coke is called batch.
3.2 Basic lot
It means the specified minimum batch.
3.3 Share sample
It means the coke sample obtained by sampling tool when it works one time at
one part of one lot of coke (continuous times available for manual sampling).
4 General
4.1 Moisture sample
4.1.1 After moisture sampling, it shall be immediately put into a
corrosion-resistant sample storage barrel with a sealed cover or other
watertight sealed container. Tightly cap the barrel or container after each share
sample is put in place.
4.1.4 For obvious damp samples, when the determination results are affected
during the preparation of samples, the samples and the container shall be
weighed together. Spread the samples in a thin layer on a steel plate in a warm
and well-ventilated room for air drying; or put the samples into a large oven for
incomplete drying before natural cooling. Weigh the container and the dried
samples.
4.1.5 The precision of weighing apparatus shall be proper. The maximum
capacity of the weighing apparatus shall not exceed 5 times of the sample
mass; the minimum division value shall be less than 1/1000 of the maximum
capacity.
4.1.6 The total precision of this Standard in sampling, preparation of samples
and determination shall be ±1.0% (absolute value) when the degree of
confidence is 95%. The total precision of coke of which the moisture is over
10% shall be ±10.0% (relative value).
4.2 Quantity and mass of share sample
The quantity and mass of share sample listed in this Standard shall be the
minimum ones that are required to reach specified sampling precision. When
the actual lot is less than the basic lot, the quantity and mass of share sample
shall not be reduced progressively at the actual lot-basic lot proportion.
5 Sampling
5.1 Sampling tools
5.1.1 Long-handle sampling shovel
Specification of long-handle sampling shovel is shown in Table 1 and Figure 1.
5.1.2 Sample storage barrel
The barrel mouth shall be tightly connected to the cover. It is made of
nonabsorbent and corrosion resistant material.
5.2 Sampling place
5.2.1 The transfer point from coking plant convey belt to iron-making plant
convey belt.
5.2.2 The coke falling point of the coke bin or discharge spout.
5.2.3 The transfer point of loading and unloading truck, ship or over-casting
convey belt.
5.2.4 Different layout points in the truck, ship or coke pile during loading and
unloading.
5.2.5 On the convey belt for transporting coke.
5.3 Batch
5.3.1 Basic lot is 500 t. During the daily production, quantity of coke
transported per shift shall be regarded as a batch; if quantity of coke
transported per shift is less than 200 t, then the quantity of coke transported
per day shall be regarded as a batch.
5.4 Determination of quantity and mass of share samples
5.4.1 The minimum quantity of share samples of one lot of coke shall be
determined in accordance with Table 2; for coke batch that is greater than 500
t, the quantity of share samples shall be increased according to the method
specified in 4.2.The quantity shall be increased by 1.3 times for ship and
large-pile sampling.
5.5 Sampling in coke flow
5.5.1 During the coke transporting by belt conveyer, the interval of share
sampling shall be determined according to the batch and the quantity of share
samples of each batch.
5.5.2 Sampling at coke bin or discharge spout
The sampling at coke bin or discharge spout is the same as that in coke flow
(5.5.1 a)).
5.5.3 Sampling of loading and unloading truck, ship or over-casting by
adopting belt conveyer is the same as that mentioned in 5.5.1.However, if
there is no conditions to install a mechanical sampling funnel, sampling shall
be conducted as specified in 5.5.4.
5.5.4 Other sampling methods in loading and unloading truck, ship or
cover-casting.
5.5.4.3 Sampling in ship
Sampling in ship shall be also conducted during the loading and unloading.
Divide the coke stored in the freight house into several sampling layers. The
upper sampling layer is 0.1 m ~ 0.2 m away from the top;
6 Preparation of coke samples for industrial analysis
6.1 House, equipment-tools
6.1.1 Preparation room
Preparation room shall include preparation of samples (crush, mix, divide,
screen, etc.), storage of samples, drying, etc. The room shall be large and
bright enough without being affected by rain or wind or foreign dust. It shall
have dust-proof equipment.
6.1.2 Crusher
Crusher applicable to preparation of samples includes jaw crusher, roll-type
crusher and other sealed grinders. Theses equipment can be used as long as
their material and ratio of crushing meet corresponding requirements, without
contamination and easy to clean.
6.1.3 Divider
The inside surface shall be smooth. It shall adopt sealed type to prevent loss of
moisture and powder sample. Cone type, rotary type or dichotomous type shall
be adopted. Before use, the divider shall be calibrated according to the
provisions in GB/T 2007.5.The precision calibration result shall comply with
corresponding requirements.
6.1.4 Screen
6.1.4.1 Perforated screen size. 60 mm×60 mm.
6.1.5 Sampling shovel, sample tray, brush, weighing apparatus,
thermostatic drier, etc.
6.2 Preparation of samples
6.2.1 Preparation of total moisture samples
Crush all coke sample to be less than 60 mm. The sample mass shall not be
less than 40 kg after fully mixing and dividing. Crush the sample to be less than
13 mm. Divide the samples into two equal shares. One of them shall be used
to divide special samples for determining moisture, and the other shall be used
to divide samples for other analyses. Mixing method is described in 6.3.1, and
division method is described in 6.3.2.
6.2.2 Preparation of analysis samples
Evenly mix the other sample that has been crushed and is less than 13 mm,
and the splitting shall not be less than 4 kg. Crush its size to be less than 6 mm,
and the evenly mixed splitting shall not be less than 2 kg. Crush its size to be
less than 3 mm, and the evenly mixed splitting shall be 1 kg. Completely crush
1 kg of sample to 1 mm.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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