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GB/T 24204-2025: Iron ores for blast furnace feedstocks - Determination of low-temperature reduction-disintegration indices - Dynamic method
Status: Valid GB/T 24204: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 24204-2025 | English | 284 |
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Iron ores for blast furnace feedstocks - Determination of low-temperature reduction-disintegration indices - Dynamic method
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GB/T 24204-2025
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| GB/T 24204-2009 | English | 194 |
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Iron ores for blast furnace feedstocks -- Determination of low-temperature reduction-disintegration indices by dynamic method
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GB/T 24204-2009
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PDF similar to GB/T 24204-2025
Basic data | Standard ID | GB/T 24204-2025 (GB/T24204-2025) | | Description (Translated English) | Iron ores for blast furnace feedstocks - Determination of low-temperature reduction-disintegration indices - Dynamic method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | D31 | | Classification of International Standard | 73.060.10 | | Word Count Estimation | 14,183 | | Date of Issue | 2025-06-30 | | Date of Implementation | 2026-01-01 | | Older Standard (superseded by this standard) | GB/T 24204-2009 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 24204-2025: Iron ores for blast furnace feedstocks - Determination of low-temperature reduction-disintegration indices - Dynamic method
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ICS 73.060.10
CCSD31
National Standard of the People's Republic of China
Replaces GB/T 24204-2009
Iron ore for blast furnace charge
Dynamic test method for determination of low temperature reduction powdering rate
Released on June 30, 2025
Implementation on January 1, 2026
State Administration for Market Regulation
The National Standardization Administration issued
Table of Contents
Preface III
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 Principle 1
5 Sampling, sample preparation and test sample preparation 2
6 devices 2
7 Test conditions 5
8 Test Step 6
9 Presentation of results 6
10 Test Report 7
11 Check 7
Appendix A (Normative) Test Result Acceptance Process 9
Reference 10
Preface
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents"
Drafting.
This document replaces GB/T 24204-2009 "Dynamic test method for determination of low temperature reduction pulverization rate of iron ore for blast furnace charge" and
Compared with GB/T 24204-2009, in addition to structural adjustments and editorial changes, the main technical changes are as follows.
a) Added a chapter on “Terms and Definitions” (see Chapter 3);
b) The four sizes of test sieves, 16mm, 12.5mm, 10mm and 11.2mm, have been deleted (see 5.6 of the.2009 edition);
c) The sieving step of “separating the free carbon precipitated during the reduction process” has been deleted (see 7.3 of the.2009 edition);
d) Added the use of mechanical screening (see 8.3);
e) Added recommendations for ensuring consistency of screening results among multiple laboratories when comparing results (see 8.3).
This document is equivalent to ISO 13930.2015 "Iron ore for blast furnace charge - Dynamic determination of low-temperature reduction pulverization rate".
The following minimal editorial changes have been made to this document.
--- To coordinate with the existing standard, the name of the standard is changed to "Dynamic test for determination of low temperature reduction pulverization rate of iron ore for blast furnace charge"
Law";
---Change "CH4" to "N2" and correct the error in the original ISO text (see 7.2.1);
--- Added the notes to Table 1 (see Table 1);
---Added references.
Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.
This document was proposed by the China Iron and Steel Association.
This document is under the jurisdiction of the National Technical Committee on Iron Ore and Direct Reduced Iron (SAC/TC317).
This document was drafted by. Baoshan Iron & Steel Co., Ltd., Baowu Resources Co., Ltd., Shaoxing Shangyu Hongxing Machinery and Instrument Manufacturing Co., Ltd.
Company, China Certification and Inspection Group Hebei Co., Ltd., Anshan Kexiang Instrument Co., Ltd., Shanghai Customs Industrial Products and Raw Materials Testing
Technology Center, Baosteel Zhanjiang Iron and Steel Co., Ltd., and Metallurgical Industry Standards and Information Research Institute.
The main drafters of this document are. Chu Yongjun, Chen Xiaoqi, Jin Jianhua, Li Peiliang, Zhang Guanlai, Wang Chunsheng, Jiang Xue, Chen Hailin, Chen Hailan, Zhang Dapeng,
Yang Hongmin, Chen Jin, Wang Bing, Kang Xiping, Chen Zibin, and Zhang Chen.
This document was first published in.2009 and this is the first revision.
Iron ore for blast furnace charge
Dynamic test method for determination of low temperature reduction powdering rate
WARNING. This document may involve hazardous procedures and equipment. This document does not purport to address all safety concerns associated with its use.
It is the responsibility of the user of this document to establish appropriate safety and health precautions and to determine the applicability of regulatory requirements prior to use.
1 Scope
This document specifies a dynamic test method for the relative measurement of the reduction pulverization index of iron ore during reduction in the low temperature reduction zone of a blast furnace.
This document applies to lump ore and thermally bonded pellets.
2 Normative references
The contents of the following documents constitute the essential clauses of this document through normative references in this document.
For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to
This document.
Note. GB/T 10322.1-2023 Iron ore sampling and sample preparation methods (ISO 3082.2017, IDT)
ISO 3310-1 Test sieves - Technical requirements and inspection - Part 1.Test sieves with woven wire mesh
Note. GB/T 6003.1-2022 Test sieves - Technical requirements and inspection - Part 1.Wire mesh test sieves (ISO 3310-1.2016, MOD)
ISO 3310-2 Test sieves - Technical requirements and inspection - Part 2.Test sieves made of perforated metal
Note. GB/T 6003.2-2024 Test sieves - Technical requirements and inspection - Part 2.Metal perforated plate test sieves (ISO 3310-2.2013, IDT)
Note. GB/T 20565-2022 Terminology for iron ore and direct reduced iron (ISO 11323.2010, IDT)
3 Terms and Definitions
For the purposes of this document, the terms and definitions given in ISO 11323 apply.
4 Principles
The test samples of a certain particle size range were heated in a rotating reaction tube at a temperature of 500℃ with hydrogen (H2), carbon monoxide (CO), carbon dioxide
The reduced sample was isothermally reduced for 60 min using a reducing gas consisting of CO2 and nitrogen (N2).
The 0.5mm square hole sieve was used for screening. The ore mass of ore with diameters greater than 6.30mm, less than 3.15mm and less than 0.5mm was compared with that after reduction.
The percentage of the total mass of the test sample is expressed as three low temperature dusting indices (LTD).
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