GB/T 16477.1-2024 English PDF

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GB/T 16477.1-2024: Chemical analysis methods of silicon-based composite rare earth ferroalloy and RE-Mg ferro-silicon alloy - Part 1: Determination of total rare earth and fifteen rare earth elements contents
Status: Valid

GB/T 16477.1: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 16477.1-2024	519	Add to Cart	5 days	Chemical analysis methods of silicon-based composite rare earth ferroalloy and RE-Mg ferro-silicon alloy - Part 1: Determination of total rare earth and fifteen rare earth elements contents	Valid
GB/T 16477.1-2010	519	Add to Cart	3 days	Chemical analysis methods of rare-earth ferrosilicon alloy and rare-earth ferrosilicon magnesium alloy -- Part 1: Determination of total rare earth content	Obsolete
GB/T 16477.1-1996	319	Add to Cart	3 days	Methods for chemical analysis of rare earth ferrosilicon alloy and rare earth ferrosilicon magnesium alloy--Determination of total rare earth content	Obsolete

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Basic data

Standard ID: GB/T 16477.1-2024 (GB/T16477.1-2024)
Description (Translated English): Chemical analysis methods of silicon-based composite rare earth ferroalloy and RE-Mg ferro-silicon alloy - Part 1: Determination of total rare earth and fifteen rare earth elements contents
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: H14
Classification of International Standard: 77.120.99
Word Count Estimation: 26,236
Date of Issue: 2024-04-25
Date of Implementation: 2024-04-25
Older Standard (superseded by this standard): GB/T 16477.1-2010
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 16477.1-2024: Chemical analysis methods of silicon-based composite rare earth ferroalloy and RE-Mg ferro-silicon alloy - Part 1: Determination of total rare earth and fifteen rare earth elements contents

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 77:120:99 CCSH14 National Standards of People's Republic of China Replaces GB/T 16477:1-2010 Rare Earth Ferrosilicon Alloy and Magnesium Ferrosilicon Alloy Chemistry Analytical methods Part 1: Total amount of rare earth, Determination of the content of fifteen rare earth elements Released on 2024-04-25 2024-04-25 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 is Part 1 of GB/T 16477 "Chemical analysis methods for rare earth ferrosilicon alloys and magnesium ferrosilicon alloys": GB/T 16477 has been The following parts have been published: --- Part 1: Determination of total rare earth content and content of fifteen rare earth elements; --- Part 2: Determination of calcium, magnesium and manganese content - Inductively coupled plasma optical emission spectrometry; --- Part 3: Determination of magnesium oxide content by inductively coupled plasma optical emission spectrometry; --- Part 4: Determination of silicon content; --- Part 5: Determination of titanium content - Inductively coupled plasma optical emission spectrometry: This document replaces GB/T 16477:1-2010 "Chemical analysis methods for rare earth ferrosilicon alloys and magnesium ferrosilicon alloys Part 1: Rare earth total Compared with GB/T 16477:1-2010, in addition to structural adjustments and editorial changes, the main technical changes are as follows: a) Changed the determination range of total rare earth content in Method 1 from “0:50%~6:00%” to “0:50%~10:00%” (see Section 1 Chapter 1 of the:2010 edition); b) Changed the determination range of total rare earth content in Method 2 from "2:00%~42:00%" to "10:00%~40:00%" (see Section 1 Chapter 10 of the:2010 edition); c) Added fifteen rare earth element content determination ranges in Method 1 and Method 2 (see Chapter 1); d) The requirements for instrumentation, test procedures, determination, test data processing, and precision of Method 1 have been modified (see Chapter 4,:2010 Chapters 4, 6, 7 and 8 of the:2011 edition); e) The requirements for instrumentation, test procedures, determination, test data processing, and precision of Method 2 have been modified (see Chapter 5,:2010 Chapters 14, 15 and 16 of the:2011 edition); f) Quality assurance and control (see Chapter 9 and Chapter 17 of the:2010 edition) have been deleted: 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 and coordinated by the National Rare Earth Standardization Technical Committee (SAC/TC229): This document was drafted by: Ganzhou Nonferrous Metallurgy Research Institute Co:, Ltd:, Guohe General Testing Evaluation and Certification Co:, Ltd:, China Northern Rare Earth (Group) High-tech Co:, Ltd:, Qiandong Rare Earth Group Co:, Ltd:, Ganzhou Rare Earth Youli Technology Development Co:, Ltd:, Baotou Hong Bote Technology Co:, Ltd:, Youyan Rare Earth New Materials Co:, Ltd:, Baotou Huamei Rare Earth High-Tech Co:, Ltd:, Baotou Rare Earth Research Institute, Inner Mongolia Shengquan Keliyuan New Material Technology Co:, Ltd: The main drafters of this document are: Xie Lu, Liu Hong, Li Ying, Zeng Xuehua, Hu Fangfei, Tian Jia, Dong Sanli, Xu Ning, Wen Bin, Hu Weizhong, Jiang Yuan, Li Minglai, Cui Chunyan, Xue Jianping, Luo Yansheng, Yu Yahui, Ma Hankun, Ai Fengge, Shi Xiang, Tian Zhirui, Wu Yingxin, Liu Pengyu, Zhu Ni, Sun Erfeng, Lü Nannan and Wang Xin: The previous versions of this document and the documents it replaces are as follows: ---First published in:1996 as GB/T 16477:1-1996, first revised in:2010; ---This is the second revision:

Introduction

Rare earth ferrosilicon alloy and rare earth magnesium ferrosilicon alloy are important rare earth alloy products: Rare earth plays the role of refining, desulfurization, and neutralizing low-melting point harmful impurities: Rare earth ferrosilicon alloys have been widely used in the steel industry, mainly for It is used to remove harmful impurity elements (O, S, N, As, etc:) in molten steel: It is the basic material for producing spheroidizing agent, vermicularizing agent and inoculant: As an additive and alloying agent in iron: Rare earth magnesium silicon iron alloy is a good inoculant, creeping agent and modifier, and has good deoxidation and desulfurization effects: Chemical composition is an important assessment indicator for rare earth ferroalloy products: Scientific and accurate chemical composition analysis method standards are clearly applicable: The scope of the test is standardized, reagents and materials, test equipment and procedures are standardized, and precision data is given after repeated tests and verifications, which can enhance the The consistency and comparability of data between laboratories provide a rigorous and standardized quality inspection for rare earth ferrosilicon alloy and rare earth magnesium ferrosilicon alloy products: Technical means are conducive to promoting the production and trade of rare earth ferrosilicon alloy and rare earth magnesium ferrosilicon alloy products: GB/T 16477 "Chemical Analysis Methods for Rare Earth Ferrosilicon Alloys and Magnesium Ferrosilicon Alloys" consists of 5 parts: --- Part 1: Determination of total rare earth content and content of fifteen rare earth elements; --- Part 2: Determination of calcium, magnesium and manganese content - Inductively coupled plasma optical emission spectrometry; --- Part 3: Determination of magnesium oxide content by inductively coupled plasma optical emission spectrometry; --- Part 4: Determination of silicon content; --- Part 5: Determination of titanium content - Inductively coupled plasma optical emission spectrometry: The total amount of rare earth and the content of related rare earth elements in rare earth ferrosilicon and rare earth magnesium ferrosilicon products must comply with regulations in transactions: The product standards for rare earth ferrosilicon alloys and magnesium ferrosilicon alloys were revised in 2023, and their various technical indicators have been updated: Changes, adding lanthanum-based rare earth ferrosilicon alloys and magnesium-based ferrosilicon alloys on the basis of cerium-based and yttrium-based rare earth ferrosilicon alloys and magnesium-based ferrosilicon alloys In view of this, it is necessary to revise GB/T 16477:1-2010 to ensure that the standard adapts to industry changes and market demands: This document adds lanthanum-based rare earth ferrosilicon alloy and magnesium ferrosilicon alloy product testing, and tests the content of fifteen rare earth elements separately: This document further improves the applicability of the standard and is applicable to rare earth ferrosilicon alloys and magnesium ferrosilicon alloys: The quality of alloy products is of great significance in promoting their production, trade and expanding application needs: In:2017, eight laboratories conducted a study on 22 samples of different levels of total rare earth content and 15 rare earth elements in rare earth ferrosilicon alloys and magnesium ferrosilicon alloys: Each laboratory tests the total amount of rare earths and the content of fifteen rare earth elements in rare earth ferrosilicon alloys and magnesium ferrosilicon alloys: Each level of was independently measured 11 times under repeatability conditions: The test data were statistically analyzed according to GB/T 6379:2: Rare Earth Ferrosilicon Alloy and Magnesium Ferrosilicon Alloy Chemistry Analytical methods Part 1: Total amount of rare earth, Determination of the content of fifteen rare earth elements Warning---People who use this document should have practical experience in formal laboratory work: This document does not indicate all possible safety Users should have certain professional knowledge and skills and be fully aware of the gas leakage, current leakage, Fire or other serious consequences:

1 Scope

This document describes the method for determining the total amount of rare earth and the contents of fifteen rare earth elements in rare earth ferrosilicon alloys and magnesium ferrosilicon alloys: This document is applicable to the determination of the total amount of rare earth and the content of fifteen rare earth elements in rare earth ferrosilicon alloys and magnesium ferrosilicon alloys, including inductively coupled Plasma atomic emission spectrometry (method 1) and EDTA titration (method 2): The measurement range of method 1 is shown in Table 1: The measurement range of method 2 is shown in Table 1: See Table 2: Table 1 Measurement range of method 1 Determination of elements Quality score Determination of elements Quality score Lanthanum 0:030~10:00 Dysprosium 0:030~0:50 Cerium 0:030~10:00 Holmium 0:030~0:50 Praseodymium 0:030~0:50 Erbium 0:030~0:50 Neodymium 0:030~0:50 Thulium 0:030~0:50 Samarium 0:030~0:50 Ytterbium 0:030~0:50 Europium 0:030~0:50 Lutetium 0:030~0:50 Gadolinium 0:030~0:50 Yttrium 0:030~10:00 Terbium 0:030~0:50 Total amount of rare earth 0:50~10:00 Table 2 Measurement range of method 2 Determination of elements Quality score Determination of elements Quality score Lanthanum 0:050~40:00 Dysprosium 0:050~2:00 Cerium 0:050~40:00 Holmium 0:050~2:00 Praseodymium 0:050~2:00 Erbium 0:050~2:00 Neodymium 0:050~2:00 Thulium 0:050~2:00 Samarium 0:050~2:00 Ytterbium 0:050~2:00 Europium 0:050~2:00 Lutetium 0:050~2:00 Gadolinium 0:050~2:00 Yttrium 0:050~40:00 Terbium 0:050~2:00 Total rare earth 10:00~40:00 ......

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