GB/T 10322.5-2024 PDF English
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| GB/T 10322.5-2024 | English | 440 |
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Iron ores - Determination of the moisture content of a lot
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| GB/T 10322.5-2016 | English | 130 |
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Iron ores -- Determination of the moisture content of a lot
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| GB/T 10322.5-2000 | English | 70 |
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Iron ores - Determination of moisture content of a consignment
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GB/T 10322.5-2024: Iron ores - Determination of the moisture content of a lot---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/GBT10322.5-2024
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 73.060.10
CCS D 31
GB/T 10322.5-2024 / ISO 3087.2020
Replacing GB/T 10322.5-2016
Iron ores - Determination of the moisture content of a lot
(ISO 3087.2020, IDT)
Issued on. MAY 28, 2024
Implemented on. DECEMBER 01, 2024
Issued by. State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword... 3
Introduction... 5
1 Scope... 6
2 Normative references... 6
3 Terms and definitions... 6
4 Principle... 7
5 Apparatus... 7
6 Sample preparation... 7
7 Test procedure... 8
8 Verification... 10
9 Calculations and expression of results... 10
10 Test report... 14
Annex A (informative) Determination of moisture content of adhesive or wet iron ores
... 15
Annex B (normative) Corrections for sprinkled water and/or rainwater... 17
Annex C (informative) Precision of moisture measurement... 23
Annex D (informative) Examples of test reports... 24
Foreword
This document was drafted in accordance with the rules given in GB/T 1.1-2020,
Directives for standardization - Part 1.Rules for the structure and drafting of
standardizing documents.
This document is Part 5 of GB/T 10322.The following parts have been published under
GB/T 10322.
-- 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 the moisture content of a lot;
-- 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 replaces GB/T 10322.5-2016 Iron ores - Determination of the moisture
content of a lot. Compared with GB/T 10322.5-2016, the main technical changes are as
follows.
a) Change the normal reference method for determining the moisture content (see
7.2.2; 7.2.2 of the 2016 edition);
b) Add alternative methods for determining the moisture content (see 7.3);
c) Change the accuracy requirements for the weighing device (see 5.3; 5.3 of the
2016 edition);
d) Change the calculation and presentation of results (see Chapter 9; Chapter 9 of
the 2016 edition).
This document is identical to ISO 3087.2020, Iron ores - Determination of the moisture
content of a lot.
Please note that some of the contents of this document may involve patents. The issuing
organization of this document is not responsible for identifying patents.
This document was proposed by China Iron and Steel Industry Association.
This document shall be under the jurisdiction of Technical Committee 317 on Iron ore
and Direct Reduced Iron of Standardization Administration of China (SAC/TC 317).
Drafting organizations of this document. Baoshan Iron and Steel Co., Ltd., Anhui
Changjiang Steel Co., Ltd., Anhui Demipu Testing Technology Co., Ltd., SGIS
Songshan Co., Ltd., Zhejiang Ford Machinery Manufacturing Co., Ltd., China
Metallurgical Information and Standardization Institute.
Main drafters of this document. Chu Yongjun, Chen Xiaoqi, Chen Wen, Jin Jianhua,
Wang Chunsheng, Chen Hailan, Wang Bing, Kang Xiping, Zhao Jingjing, Huang Bifen,
Chen Rong, Qin Debo, Liu Jia, Liu Xuezhi, Zhou Banglian, Huang Hesheng, Shen Ju,
Fan Kejian.
This document was first published in 2000, and first revised in 2016.This is the second
revision.
1 Scope
This document specifies a method for the determination of the moisture content of a lot
of iron ore.
2 Normative references
The following documents are referred to in the text in such a way that some or all of
their content constitutes requirements 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.
ISO3082, Iron ores - Sampling and sample preparation procedures
Note. GB/T 10322.1-2023, Iron ores - Sampling and sample preparation
procedures (ISO 3082.2017, IDT)
ISO 3085, Iron ores - Experimental methods for checking the precision of sampling
Note. GB/T 10322.3-2000, Iron ores - Experimental methods for checking the
precision of sampling (ISO 3085.1996, IDT)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 11323 apply.
4 Principle
Dry the test portion in air at 105 °C and measure the loss in mass. Express the moisture
content as the mass loss relative to the original mass of the sample as a mass fraction
(%).
5 Apparatus
Equipped with a temperature indicator and control apparatus capable of regulating the
temperature at any point in the oven at 105 °C ± 5 °C and so designed as to maintain
this temperature with a current of air to ensure efficient drying but without any loss of
sample, and fitted with a fan that allows for both the circulation and change of air.
6 Sample preparation
Test samples that have been taken and prepared in accordance with ISO 3082 shall be
used. The mass of a test portion, in relation to its nominal top size, is specified in Table
1, in accordance with ISO 3082.
7 Test procedure
Carry out one moisture measurement per test portion on the number of test portions
specified in Table 2, in accordance with the conditions of preparation of the test sample.
In order to minimize losses of moisture to the atmosphere, it is necessary to perform all
the initial weighings of the test portions as quickly as possible after obtaining those test
portions.
The moisture determination shall be conducted in accordance with 7.2.2 or, optionally
for ores with 8 % or more of combined water, in accordance with 7.2.3.
8 Verification
Regular checking of apparatus and procedures is essential to verify the test results.
Checks shall be carried out prior to the commencement of a routine test in accordance
with this document and at regular intervals thereafter. The frequency of checking is a
matter for each laboratory to determine. A detailed record of all verification activities
shall be maintained for the following items.
9 Calculations and expression of results
The result of the determination of the moisture content, wi, expressed as a mass fraction
(%), for each test portion, is given by Formula (1) and reported to the second decimal
place.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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