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GB/T 43877-2024: Iron ores - Method for determination of assimilation performance
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GB/T 43877-2024: Iron ores - Method for determination of assimilation performance

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ICS 73:060:10 CCSD31 National Standards of People's Republic of China Determination method of assimilation performance of iron ore Released on 2024-04-25 2024-11-01 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: 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): The drafting units of this document: Laiwu Branch of Shandong Iron and Steel Co:, Ltd:, University of Science and Technology Beijing, and Metallurgical Industry Information Standards Research Institute: The main drafters of this document are: Li Jianyun, Zhang Pei, Liang Dong, Zhao Xinhua, Yuan Shujun, Liu Zhiwei, She Xuefeng, Wang Jingsong, Chen Zibin, and Wang Tiantian: Determination method of assimilation performance of iron ore

1 Scope

This document describes the terms and definitions, principles, materials, instrumentation, sample preparation, test procedures, Precision and test reports: This document applies to the determination of the assimilation properties of iron 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: GB/T 6379:1 Accuracy (trueness and precision) of measurement methods and results Part 1: General principles and definitions GB/T 6379:2 Accuracy (trueness and precision) of measurement methods and results Part 2: Determination of repeatability of standard measurement methods Basic methods of sex and reproducibility GB/T 8170 Rules for rounding off values and expression and determination of limit values GB/T 10322:1 Iron ore sampling and sample preparation methods GB/T 20565 Terminology of iron ore and direct reduced iron

3 Terms and definitions

The terms and definitions defined in GB/T 20565 and the following apply to this document: 3:1 The reactivity of iron oxides in iron ore with calcium oxide reflects the difficulty of generating liquid phase during sintering of iron ore: The three parameters of assimilation evaluation were start temperature, end temperature of assimilation and assimilation reaction time: 3:2 Ts In the assimilation reaction test, when the iron ore powder sample decreases by 0:5 mm in the longitudinal direction or increases or decreases by 0:5 mm in the transverse direction, it is judged that the assimilation reaction has started: The temperature corresponding to this time: 3:3 Te After the assimilation reaction test begins, the size of the iron ore powder sample does not change within 6 minutes, and the assimilation reaction is judged to have occurred before 6 minutes: It should end, and the temperature corresponding to the end: 3:4 Assimilation time The time from the start to the end of the assimilation reaction in the assimilation reaction test: ...