GB/T 43877-2024Iron ores—Method for determination of assimilation performance (English PDF)

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

GB/T 6379

GB/T 6379

GB/T 8170

GB/T 10322

GB/T 20565

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: