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GB/T 24189-2024: Iron ores for blast furnace feedstocks - Determination of the reducibility by the final degree of reduction index
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Std ID	Version	USD	Buy	Deliver [PDF] in	Title (Description)
GB/T 24189-2024	English	274	Add to Cart	3 days [Need to translate]	Iron ores for blast furnace feedstocks - Determination of the reducibility by the final degree of reduction index
GB/T 24189-2009	English	399	Add to Cart	3 days [Need to translate]	Iron ores for blast furnace feedstocks -- Determination of the reducibility by the final degree of reduction index

GB/T 24189-2024: Iron ores for blast furnace feedstocks - Determination of the reducibility by the final degree of reduction index

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ICS 73:060:10 CCSD31 National Standards of People's Republic of China Replace GB/T 24189-2009 Final reduction index for iron ore used in blast furnaces Determination of the reducibility of (ISO 7215:2015, IDT) Released on 2024-05-28 2024-12-01 implementation State Administration for Market Regulation The National Standardization Administration issued

Foreword

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 24189-2009 "Determination of the reducibility of iron ore for blast furnaces expressed by the final reduction index" and Compared with GB/T 24189-2009, in addition to structural adjustments and editorial changes, the main technical content changes are as follows: a) The timer in the test equipment composition has been deleted (see 6:1 of the:2009 edition); b) The restore operation has been changed (see 8:3, 8:3 of the:2009 edition); c) Add the provisions for FeO conversion factor (see 9:1): This document is equivalent to ISO 7215:2015 "Determination of the reducibility of iron ores for blast furnace use - expressed as the final reduction index": 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 Iron Ore and Direct Reduced Iron Standardization Technical Committee (SAC/TC317): This document was drafted by: Baoshan Iron & Steel Co:, Ltd:, Anshan Xingyuanda Technology Co:, Ltd:, Shaoxing Shangyu Hongxing Machinery Instrument Manufacturing Co:, Ltd: Manufacturing Co:, Ltd:, Metallurgical Industry Information Standards Research Institute: The main drafters of this document are: Chen Xiaoqi, Wang Chunsheng, Chu Yongjun, Kang Xiping, Zhao Jingjing, Lin Xuewu, Hu Jingke, Xiang Enguang, Zhang Guanlai, Chen Jin: This document was first published in:2009 and this is the first revision: Final reduction index for iron ore used in blast furnaces Determination of the reducibility of Warning---People who use this document should have practical experience in formal laboratory work: This document does not address all possible safety issues: The user is responsible for taking appropriate safety and health measures and ensuring compliance with the conditions stipulated in relevant national laws and regulations:

1 Scope

This document specifies a relative measure of the degree of separation of oxygen from iron ore under conditions simulating the reduction zone of a blast furnace: This document applies to lump ore, sintered ore and pelletized ore:

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: ISO 2597-1 Iron ores - Determination of total iron content - Part 1: Tin (II) chloride reduction titration method Note: GB/T 6730:70-2013 Determination of total iron content in iron ore - Stannous chloride reduction titration method (ISO 2597-1:2006, MOD) ISO 2597-2 Iron ores - Determination of total iron content - Part 2: Titanium (III) chloride reduction titration method Note: GB/T 6730:5-2022 Determination of total iron content in iron ore - Titanium trichloride reduction titration method (ISO 2597-2:2019, MOD) Note: GB/T 10322:1-2014 Iron ore sampling and sample preparation methods (ISO 3082:2009, IDT) ISO 9035 Iron ores - Determination of acid-solu- bleiron (Ⅱ) content-Titrimetric method) Note: GB/T 6730:71-2014 Determination of ferrous iron content in acid-soluble iron ore by titration (ISO 9035:1989, MOD) Note: GB/T 20565-2022 Terminology of iron ore and direct reduced iron (ISO 11323:2010, IDT)

3 Terms and definitions

For the purpose of this document, the terms and definitions given in ISO 11323 apply:

4 Principle

The test sample was reduced at a constant temperature of 900°C in a fixed bed using a reducing gas composed of CO and N2 for 180 min: The final reduction degree (R180) was calculated from the oxygen loss after 180 min: ...