GB/T 10322.1-2023 PDF English
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Iron ores - Sampling and sample preparation procedures
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Iron ores -- Sampling and sample preparation procedures
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Iron ores. Sampling and sample preparation procedures
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Iron ores--Increment sampling and sample preparation--Mechanical method
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GB/T 10322.1-2023: Iron ores - Sampling and sample preparation procedures---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/GBT10322.1-2023
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 73.060.10
CCS D 31
GB/T 10322.1-2023 / ISO 3082.2017
Replacing GB/T 10322.1-2014
Iron Ores – Sampling and Sample Preparation Procedures
(ISO 3082.2017, IDT)
Issued on. AUGUST 6, 2023
Implemented on. MARCH 1, 2024
Issued by. State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword... 5
Introduction... 7
1 Scope... 8
2 Normative References... 8
3 Terms and Definitions... 11
4 General Considerations for Sampling and Sample Preparation... 13
4.1 Basic requirements... 13
4.2 Establishing a sampling scheme... 14
4.3 System verification... 15
5 Fundamentals of Sampling and Sample Preparation... 16
5.1 Minimization of bias... 16
5.1.1 General... 16
5.1.2 Minimization of particle size degradation... 16
5.1.3 Extraction of increments... 16
5.1.4 Increment mass... 17
5.2 Overall precision... 18
5.3 Quality variation... 21
5.4 Sampling precision and number of primary increments... 22
5.4.1 Mass-basis sampling... 22
5.4.2 Time-basis sampling... 23
5.5 Precision of sample preparation and overall precision... 23
5.5.1 General... 23
5.5.2 Preparation and measurement of gross sample... 24
5.5.3 Preparation and measurement of partial samples... 24
5.5.4 Preparation and measurement of each increment... 25
6 Methods of Sampling... 25
6.1 Mass-basis sampling... 25
6.1.1 Mass of increment... 25
6.1.2 Quality variation... 26
6.1.3 Number of primary increments... 26
6.1.4 Sampling interval... 27
6.1.5 Methods of taking increments... 27
6.2 Time-basis sampling... 28
6.2.1 Mass of increment... 28
6.2.2 Quality variation... 28
6.2.3 Number of increments... 28
6.2.4 Sampling interval... 28
6.2.5 Methods of taking increments... 28
6.3 Stratified random sampling within fixed mass or time intervals... 29
6.3.1 General... 29
6.3.2 Fixed mass intervals... 29
6.3.3 Fixed time intervals... 29
7 Sampling from Moving Streams... 30
7.1 General... 30
7.2 Safety of operations... 30
7.3 Robustness of sampling installation... 30
7.4 Versatility of sampling system... 31
7.5 Primary samplers... 31
7.5.1 Location... 31
7.5.2 Types of primary sampler... 31
7.5.3 General design criteria for primary cutters... 35
7.5.4 Cutter aperture of primary sampler... 36
7.5.5 Cutter speed of primary sampler... 36
7.6 Secondary and subsequent samplers... 37
7.7 Online sample preparation... 37
7.7.1 Arrangement for sample preparation... 37
7.7.2 Crushers... 38
7.7.3 Dividers... 38
7.7.4 Dryers... 38
7.8 Checking precision and bias... 39
7.9 Cleaning and maintenance... 39
7.10 Example of a flowsheet... 41
8 Sampling from Stationary Situations... 43
8.1 General... 43
8.2 Sampling from trucks and wagons... 43
8.2.1 General... 43
8.2.2 Sampling devices... 43
8.2.3 Number of primary increments... 44
8.2.4 Method of sampling... 44
8.3 Sampling from ships, stockpiles and bunkers... 45
9 Stopped-Belt Reference Sampling... 45
10 Sample Preparation... 46
10.1 Fundamentals... 46
10.1.1 General... 46
10.1.2 Drying... 47
10.1.3 Crushing and grinding... 47
10.1.4 Mixing... 48
10.1.5 Division... 48
10.1.6 Mass of divided sample... 49
10.1.7 Split use and multiple use of sample... 53
10.2 Method of constituting partial samples or a gross sample... 53
10.2.1 General... 53
10.2.2 Method of constitution for mass-basis sampling... 54
10.2.3 Method of constitution for time-basis sampling... 54
10.2.4 Special procedure for moisture content... 55
10.3 Mechanical methods of division... 55
10.3.1 Mechanical increment division... 55
10.3.2 Other mechanical division methods... 57
10.4 Manual methods of division... 57
10.4.1 General... 57
10.4.2 Manual increment-division method... 57
10.4.3 Manual strip-division method... 60
10.4.4 Manual riffle-division method... 62
10.5 Preparation of test samples for chemical analysis... 63
10.5.1 Mass and particle size... 63
10.5.2 Preparation to 250μm nominal top size... 66
10.5.3 Final preparation... 66
10.5.4 Grinding to 100μm or 160μm nominal top size... 66
10.5.5 Distribution of samples for chemical analysis... 67
10.6 Preparation of test samples for moisture determination... 67
10.7 Preparation of test samples for size determination... 69
10.8 Preparation of test samples for physical testing... 69
10.8.1 Selection of sample preparation procedure... 69
10.8.2 Extraction of test samples... 71
10.8.3 Reserve samples... 78
11 Packing and Marking of Samples... 78
Annex A (Informative) Inspection of Mechanical Sampling Systems... 80
Annex B (Normative) Formulae for Number of Increments... 88
Annex C (Informative) Alternative Methods of Taking the Reference Sample... 91
Annex D (Normative) Procedure for Determining the Minimum Mass of Divided
Gross Sample for Size Determination Using Other Mechanical Division Methods... 96
Annex E (Normative) Riffle Dividers... 99
Bibliography... 101
Foreword
This Document was drafted as per the rules specified in GB/T 1.1-2020 Directives for
Standardization – Part 1.Rules for the Structure and Drafting of Standardizing Documents.
This Document is Part 1 of GB/T 10322; GB/T 10322 has published the following parts.
--- Iron Ores – Sampling and Sample Preparation Procedures;
--- Iron Ores – Experimental Methods for Evaluation of Quality Variation;
--- Iron Ores – Experimental Methods for Checking the Precision of Sampling;
--- Iron Ores – Experimental Methods for Checking the Bias of Sampling;
--- Iron Ores – Determination of Moisture Content of a Consignment;
--- Iron Ores for Blast Furnace Feedstocks – Determination of the Decrepitation Index;
--- Iron Ores and Direct Reduced Iron – Determination of Size Distribution by Sieving;
--- Iron Ores – Single-Point Determination of Specific Surface Area – Nitrogen Adsorption
Method.
This Document replaced GB/T 10322.1-2014 Iron Ores – Sampling and Sample Preparation
Procedures. Compared with GB/T 10322.1-2014, this Document has the major technical
changes besides the structural adjustments and editorial modifications.
a) Change the definition of “specimen” (see 3.6 of this Edition; 3.6 of 2014 Edition);
b) Change the “Basic requirements” in “General conditions for sampling and sample
preparation” (see 4.1 of this Edition; 4.1 of 2014 Edition);
c) Change the suspended section in the original 5.1.4 to a new added article "5.1.4.1 General
requirements";
d) Change the technical requirements in "Quality of increments for sampling of falling ore
flow" (see 5.1.4.2 of this Edition; 5.1.4.1 of 2014 Edition);
e) Change the volume density unit from "t/m3" to "kg/m3" (see 5.1.4.4 of this Edition; 5.1.4.3
of 2014 Edition);
f) Change the relevant data in Tables 1, 3 and 5 (see 5.2, 5.4 and 10.1.6.2.1 of this Edition);
g) Change the technical requirements for crushers (see 7.7.2 of this Edition; 7.7.2 of this
Edition);
h) Change the requirements for dividing of gross samples and division of individual
increments or partial samples (see 10.1.6.1.1, 10.1.6.1.2 of this Edition; 10.1.6.1.1,
10.1.6.1.2 of 2014 Edition);
i) Change the quality requirements for physical test samples (see 10.1.6.3 of this Edition;
10.1.6.3 of 2014 Edition);
j) Change the special provisions on moisture content and update the data in Table 7 (see
10.2.4 of this Edition; 10.2.4 of 2014 Edition);
k) Add manual strip division method (see 10.4.3 of this Edition);
l) Change sample preparation for moisture determination (see 10.6 of this Edition; 10.6 of
2014 Edition).
This Document equivalently adopted ISO 3082.2017 Iron Ores – Sampling and Sample
Preparation Procedures.
Please note some contents of this Document may involve patents. The issuing agency of this
Document shall not assume the responsibility to identify these patents.
This Document was proposed by China Iron and Steel Association.
This Document shall be under the jurisdiction of National Technical Committee on Iron Ore
and Direct Reduced Iron of Standardization Administration of China (SAC/TC 317).
Drafting organizations of this Document. Baoshan Iron & Steel Co., Ltd.; Shangyu Hongxing
Machinery Instrument Manufacturing Co., Ltd.; Anhui Changjiang Steel Co., Ltd.; Zhejiang
Fute Machinery Manufacturing Co., Ltd.; Benxi Longxin Mining Co., Ltd.; Qingdao Yosion
Intelligent Technology Co., Ltd.; CISDI Engineering Co., Ltd.; Tianjin Haixi Instrument Co.,
Ltd.; Dongxuan (Shanghai) Measurement and Control Technology Co., Ltd.; Jiangxi
Guangming Intelligent Technology Co., Ltd.; Zhongxin Iron and Steel Group Co., Ltd.; and
China Metallurgical Information and Standardization Institute.
Chief drafting staffs of this Document. Wang Chunsheng, Chen Hailan, Jin Jianhua, Ji Huadong,
Lu Huizhong, Zhang Guanlai, Chen Jin, Chen Rong, Qin Debo, Shen Ju, Fan Kejian, Yan
Guangliang, Hai Xiao, Yu Shuangmin, Zhang Jun, Ma Feiyue, Dong Junqiang, Zheng Yinan,
Sun Xun, He Wenli, Chen Zibin, Zhu Rong, Wang Wensheng, Ma Yunrong, Zhuo Wenkeng,
and Zhang Zhongting.
This Document was first time published in 2000; first time revised in 2014; and it is the third
time revised hereby.
1 Scope
This Document provides the methods for mechanical sampling, manual sampling and
preparation of samples taken from a lot under transfer. This is in order to determine the chemical
composition, moisture content, size distribution and other physical and metallurgical properties
of the lot, except bulk density obtained using ISO 3852 (Method 2). It includes.
2 Normative References
The provisions in following documents become the essential provisions of this Document
through reference in this Document. For the dated documents, only the versions with the dates
indicated are applicable to this Document; for the undated documents, only the latest version
(including all the amendments) is applicable to this Document.
ISO 565 Test sieve – Metal wire cloth, perforated metal plate and electroformed sheet –
Nominal sizes of openings
ISO 3084 Iron ores – Experimental methods evaluation of quality variation
NOTE. GB/T 1032.2-2000 Iron ores – Experimental methods evaluation of quality variation
(ISO 3084.1998, IDT)
3 Terms and Definitions
For the purposes of this Document, the terms and definitions given in ISO 11323 and the
following apply.
4 General Considerations for Sampling and Sample Preparation
Stopped-belt sampling is the reference method for collecting samples against which mechanical
and manual sampling procedures may be compared to establish that they are unbiased in
accordance with procedures specified in ISO 3086.
5 Fundamentals of Sampling and Sample Preparation
It is essential that increments be extracted from the lot in such a manner that all parts of the ore
have an equal opportunity of being selected and becoming part of the final sample for analysis,
irrespective of the size, mass, shape or density of individual particles. If this requirement is not
respected, bias is easily introduced. This results in the following design requirements for
sampling and sample preparation systems.
6 Methods of Sampling
For stratified random sampling within fixed time intervals, the procedure is as specified in 6.2
except that, when the time interval has been set, the sample cutter is programmed to take one
primary increment at random within this time interval. This is achieved by using a random
number generator, capable of giving a random time number within the time interval (determined
in 6.2.4), which activates the sample cutter at the time corresponding to the time number
generated.
7 Sampling from Moving Streams
From the initial stage of design and construction of sampling systems, due consideration shall
be given to the safety of operators. Local or national safety codes shall be respected.
It is recommended that mechanical sampling be used if the speed of the conveyor belt is high
or the mass of the ore handled by the conveyor belt is large. Unless stopped-belt sampling is
adopted, the use of manual sampling in such cases could be dangerous for the sampling staff.
8 Sampling from Stationary Situations
The spear sampler (see Figure 5) or auger for extracting increments shall have minimum
internal dimensions of 30 mm.
The increments to be taken from each truck or wagon shall be taken from locations spaced as
evenly as possible over the surface of the ore in the truck or wagon using a spear sampler or an
auger so that increments represent almost uniform masses of ore. It is essential that each
increment is taken from the full depth of ore in the truck or wagon, and that the full vertical
column of ore is extracted for the increment to be representative. If these conditions are not met,
9 Stopped-Belt Reference Sampling
Stopped-belt sampling is the accepted method for obtaining a reference sample against which
other sampling procedures may be compared. However, special care is required if the samples
are for moisture determination, because moisture may be lost while the reference sample is
being removed from the conveyor.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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