GB/T 10322.1-2023 in English

GB/T 10322.1-2023 Iron ores - Sampling and sample preparation procedures

Warning: This document may involve hazardous materials, operations and equipment, and does not purport to address all the safety issues associated with its use. It is the responsibility of the user of this document to establish appropriate health and safety practices.

1 Scope

This document provides

a) the underlying theory,

b) the basic principles for sampling and preparation of samples, and

c) the basic requirements for the design, installation and operation of sampling systems

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).

The methods specified in this document are applicable to both the loading and discharging of a lot by means of belt conveyors and other ore-handling equipment to which a mechanical sampler can be installed or where manual sampling can safely be conducted.

The methods are applicable to all iron ores, whether natural or processed (e.g. concentrates and agglomerates, such as pellets or sinters).

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.

ISO 565 Test sieves- Metal wire cloth, perforated metal plate and electroformed sheet- Nominal sizes of openings)
ISO 3084 Iron ores - Experimental methods for evaluation of quality variation
Note: GB/T 10322.2-2000 Iron ores - Experimental methods for evaluation of quality variation (ISO 3084:1998, IDT)
ISO 3085 Iron ores - Experimental methods for checking the precision of sampling sample preparation and measurement
Note: GB/T 10322.3-2000 Iron ores - Experimental methods for checking the precision of sampling (ISO 3085: 1996, IDT)
ISO 3086 Iron ores - Experimental methods for checking the bias of sampling
Note: GB/T 10322.4-2014 Iron ores - Experimental methods for checking the bias of sampling (ISO 3086:1998, IDT)
ISO 3087 Iron ores- Determination of the moisture content of a lot
Note: GB/T 10322.5-2016 Iron ores - Determination of the moisture content of a lot (ISO 3087 : 2011, IDT)
ISO 3271 Iron ores for blast furnace and direct reduction feedstocks- Determination of the tumble and abrasion indices
Note: GB/T 24531-2009 Iron ores for blast furnace and direct reduction feedstocks-Determination of the tumble and abrasion indices (ISO3271:2007, IDT)
ISO 3310-1 Test sieves - Technical requirements and testing- Part 1: Test sieves of metal wire cloth
ISO 3310-2 Test sieves - Technical requirements and testing- Part 2: Test sieves of perforated metal plate
ISO 3852 Iron ores for blast furnace and direct reduction feedstocks- Determination of bulk density)
Note: GB/T 34568-2017 Iron ores for blast furnace and direct reduction feedstocks-Determination of bulk density (ISO 3852:2007, IDT)
ISO 4695 Iron ores for blast furnace feedstocks - Determination of the reducibility by the rate of reduction index
Note: GB/T 24515-2009 Iron ores for blast furnace feedstocks - Determination of the reducibility by the rate of reduction index (ISO 4695:2007, IDT)
ISO 4696-1 Iron ores for blast furnace feedstocks- Determination of low temperature reduction- disintegration indices by static method- Part 1:Reduction with CO, CO2，H2 and N2
Note: GB/T 31923.1-2015 Iron ores for blast furnace feedstocks-Determination of low-temperature reduction-disintegration indices by static method-Part 1 : Reduction with CO, CO2, H2 and N2 (ISO 4696-1 :2007, MOD)
ISO 4696-2 Iron ores for blast furnace feedstocks - Determination of low- temperature reduction-disintegration indices by static method- Part 2: Reduction with CO and N2
Note: GB/T 31923.2-2015 Iron ores for blast furnace feedstocks - Determination of low-temperature reduction-disintegration indices by static method - Part 2 : Reduction with CO and N2 (ISO 4696-2 :2007, MOD)
ISO 4698 Iron ore pellets for blast furnace feed- stocks- Determination of the free- swelling index
Note: GB/T 13240-2018 Iron ore pellets for blast furnace feedstocks - Determination of the free-swelling index (ISO 4698:2007, MOD)
ISO 4700 Iron ore pellets for blast furnace and direct reduction feedstocks- Determination of the crushing strength
Note: GB/T 14201-2018 Iron ore pellets for blast furnace and direct reduction feedstocks - Determination of the crushing strength (ISO 4700 : 2015, MOD)
ISO 4701 Iron ores and direct reduced iron - Determination of size distribution by sieving
Note: GB/T 10322.7-2016 Iron ores and direct reduced iron-Determination of size distribution by sieving (ISO 4701:2008, IDT)
ISO 7215 Iron ores for blast furnace feedstocks - Determination of the reducibility by the final degree of reduction index
Note: GB/T 24189-2009 Iron ores for blast furnace feedstocks - Determination of the reducibility by the final degree of reduction index (ISO 7215:2007, IDT)
ISO 7992 Iron ores for blast furnace feedstocks Determination of reduction under load)
Note: GB/T 24530-2009 Iron ores for blast furnace feedstocks - Determination of reduction under load (ISO 7992 :2007, IDT)
ISO 8371 Iron ores for blast furnace feedstocks - Determination of the decrepitation index)
Note: GB/T 10322.6-2022 Iron ores for blast furnace feedstocks - Determination of the decrepitation index (ISO 8371:2015, IDT)
ISO 11256 Iron ore pellets for shaft direct- reduction feedstocks- Determination of the clustering index
Note: GB/T 24237-2009 Iron ore pellets for shaft direct-reduction feedstocks - Determination of the clustering index (ISO11256:2007, IDT)
ISO 11257 Iron ores for shaft direct- reduction feedstocks - Determination of the low-temperature reduction - disintegration index and degree of metallization
Note: GB/T 24235-2009 Iron ores for shaft direct-reduction feedstocks - Determination of the low temperature reduction-disintegration index and degree of metallization (ISO 11257 : 2007, IDT)
ISO 11258 Iron ores for shaft direct- reduction feedstocks- Determination of the reducibility index，final degree of reduction and degree of metallization
Note: GB/T 24236-2009 Iron ores for shaft direct-reduction feedstocks - Determination of the low temperature reduction-disintegration index and degree of metallization (ISO 11258:2007, IDT)
ISO 11323 Iron ore and direct reduced iron- Vocabulary
Note: GB/T 20565-2022 Iron ores and direct reduced iron - Vocabulary (ISO 11323:2010, IDT)
ISO 13930 Iron ores for blast furnace feedstocks - Determination of low-temperature reduction- disintegration indices by dynamic method)
Note: GB/T 24204-2009 Iron ores for blast furnace feedstocks - Determination of low-temperature reduction-disintegration indices by dynamic method (ISO 13930:2007, IDT)

3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 11323 and the following apply.

3.1
lot
discrete and defined quantity of iron ore or direct reduced iron for which quality characteristics are to be assessed

3.2
increment
quantity of iron ore or direct reduced iron collected in a single operation of a device for sampling or sample division

3.3
sample
relatively small quantity of iron ore or direct reduced iron, so taken from a lot as to be representative in respect of the quality characteristics to be assessed

3.4
partial sample
sample comprising of less than the complete number of increments needed for a gross sample

3.5
gross sample
sample comprising all increments, entirely representative of all quality characteristics of a lot

3.6
test sample
sample prepared from an increment, a partial sample or a gross sample to meet all specific conditions for a test

3.7
test portion
part of a test sample that is actually and entirely subjected to the specific test

3.8
stratified sampling
sampling of a lot carried out by taking increments from systematically specified positions and in appropriate proportions from strata

Note: Examples of strata include production periods (e.g. 5 min), production masses (e.g. 1000t), holds in vessels, wagons in a train, or containers and trucks representing a lot.

3.9
systematic sampling

sampling carried out by taking increments from a lot at regular intervals