GB/T 10322.1-2023Iron ores - Sampling and sample preparation procedures (English PDF)

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,

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.

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