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GB/T 6730.73-2024 English PDF (GB/T 6730.73-2016)

GB/T 6730.73-2024_English: PDF (GB/T6730.73-2024)
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GB/T 6730.73-2024English359 Add to Cart 4 days [Need to translate] Iron ores - Determination of total iron content - EDTA photometric titration method Valid GB/T 6730.73-2024
GB/T 6730.73-2016English238 Add to Cart 1 days [Need to translate] Iron ores -- Determination of total iron content -- EDTA photometric titration method Obsolete GB/T 6730.73-2016


BASIC DATA
Standard ID GB/T 6730.73-2024 (GB/T6730.73-2024)
Description (Translated English) Iron ores - Determination of total iron content - EDTA photometric titration method
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard D31
Classification of International Standard 73.060.10
Word Count Estimation 18,185
Date of Issue 2024-04-25
Date of Implementation 2024-11-01
Older Standard (superseded by this standard) GB/T 6730.73-2016
Drafting Organization Guangzhou Customs Technology Center, Guangdong Zhongnan Iron and Steel Co., Ltd., Chengdu Advanced Metal Materials Industry Technology Research Institute Co., Ltd., Fangcheng Customs Comprehensive Technology Service Center, Lianyungang Customs Comprehensive Technology Center, Binzhou Customs, Zhanjiang Customs Technology Center, Huangpu Customs Technology Center, Tianjin Customs Chemical Mineral Metal Materials Testing Center, Shijiazhuang Customs Technology Center, Qingdao Customs Technology Center, Shanghai Customs Industrial Products and Raw Materials Testing Technology Center, Ningbo Customs Technology Center, Metallurgical Industry Information Standards Research Institute, Baosteel Co., Ltd., Wuhan Iron and Steel Co., Ltd., Anshan Iron and Steel Co., Ltd., Longbai Sichuan Mining and Metallurgy Co., Ltd., Sun Yat-sen University, Mettler Toledo Technology (China) Co., Ltd., Swiss Metrom China Co., Ltd.
Administrative Organization National Iron Ore and Direct Reduced Iron Standardization Technical Committee (SAC/TC 317)
Proposing organization China Iron and Steel Association
Issuing agency(ies) State Administration for Market Regulation, National Standardization Administration

BASIC DATA
Standard ID GB/T 6730.73-2016 (GB/T6730.73-2016)
Description (Translated English) Iron ores -- Determination of total iron content -- EDTA photometric titration method
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard D31
Classification of International Standard 73.060.10
Word Count Estimation 9,977
Date of Issue 2016-02-24
Date of Implementation 2016-11-01
Quoted Standard GB/T 6730.1; GB/T 8170; GB/T 10322.1; GB/T 6379.2
Drafting Organization Guangdong Entry - Exit Inspection and Quarantine Bureau
Administrative Organization National Iron Ore and Direct Reduced Iron Standardization Technical Committee
Regulation (derived from) National Standard Announcement No
Proposing organization China Iron and Steel Association
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine of the People Republic of China, Standardization Administration of the People Republic of China
Summary This standard specifies the EDTA photometric titration method for determination of iron content in iron ore. This standard applies to natural iron ore, iron ore and man-made lump ore, including sinter and pellets in the determination of total iron content. The range of mass fraction is 30% ~ 72%.


GB/T 6730:73-2024: Determination of total iron content in iron ore - EDTA photometric titration method ICS 73:060:10 CCSD31 National Standards of People's Republic of China Replaces GB/T 6730:73-2016 Determination of total iron content in iron ore EDTA photometric titration Released on 2024-04-25 2024-11-01 Implementation State Administration for Market Regulation The National Standardization Administration issued 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 is Part 73 of GB/T 6730 "Iron Ore": The published parts of GB/T 6730 are shown in Appendix A: This document replaces GB/T 6730:73-2016 "Determination of total iron content in iron ore - EDTA photometric titration method" Compared with GB/T 6730:73-2016, in addition to structural adjustments and editorial changes, the main technical changes are as follows: a) Added reagent blank (see 5:14:3); b) The sample quantity has been changed (see 8:2, 7:1 of the:2016 edition); c) Added blank test (see 8:3); d) The digestion time and temperature of microwave digestion were changed, as well as the interference elimination method: sulfuric acid was used to eliminate titanium interference, and boric acid was used to reduce Effect of fluorine (see 8:4:1:1, 7:3:1 of the:2016 edition); e) Method 2: Alkali fusion method for decomposing samples (see 8:4:1:2); f) The titration method has been changed (see 8:4:2, 7:3:2 of the:2016 edition); g) Added the determination of blank test value (see 8:5); h) The precision of both methods has been increased (see 9:3): 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: Guangzhou Customs Technology Center, Guangdong Zhongnan Iron and Steel Co:, Ltd:, Chengdu Advanced Metal Materials Industry Technology Research Institute Institute Co:, Ltd:, Fangcheng Customs Comprehensive Technical Service Center, Lianyungang Customs Comprehensive Technical Center, Binzhou Customs, Zhanjiang Customs Technical Center Center, Huangpu Customs Technology Center, Tianjin Customs Chemical Mineral Metal Material Testing Center, Shijiazhuang Customs Technology Center, Qingdao Customs Technology Center, Shanghai Haikou Customs Industrial Products and Raw Materials Testing Technology Center, Ningbo Customs Technology Center, Metallurgical Industry Information Standards Research Institute, Baosteel Co:, Ltd: Co:, Ltd:, Wuhan Iron and Steel Co:, Ltd:, Anshan Iron and Steel Co:, Ltd:, Longbai Sichuan Mining and Metallurgy Co:, Ltd:, Sun Yat-sen University, Mettler Toledo Technologies (China) Co:, Ltd:, Swiss Metrohm China Co:, Ltd: The main drafters of this document are: Peng Subiao, Xiao Qian, Xiao Dahui, Zheng Jianguo, Luo Yumei, He Yingxian, Zhang Rui, Xuan Jianwen, Liang Yuefeng, Zhang Yue, Wang Qinghe, Wushu, Yao Jie, Luo Minggui, Li Xiangrong, Jiang Yu, Wang Yingjie, Wei Jibin, Tian Qiong, Huang Wei, Li Quanbin, Zhao Chao, Yue Chunlei, Zhu Zhixiu, Min Hong, Ying Haisong, Wang Tiantian, Chen Hailan, Zhou Zheng, Yu Lujun, Yu Aijun, Chen Yunpeng, Zou Xiaoyong, Li Yiqian, Wang Zhongguang: This document was first published in:2016 and this is the first revision: introduction Iron ore is the main raw material for the steel industry: In the standard system of the steel industry, the standard system for determination of chemical composition of iron ore is one of the most important standards: It is a very important part of the production process and plays an important role in ensuring the quality of iron ore products: production, trade and application, providing technical support for the high-quality development of my country's steel industry: GB/T 6730 includes a series of standards for the determination of chemical composition of iron ore, which respectively stipulates the content of moisture, total iron, metal Iron, ferrous iron, silicon, aluminum, calcium, magnesium, sulfur, phosphorus, manganese, titanium, total rare earth, barium, chromium, vanadium, tin, copper, cobalt, nickel, zinc, niobium, bismuth, potassium, sodium, carbon, lead, arsenic, Determination methods for chemical components such as cadmium, mercury, fluorine, chlorine, loss on ignition and combined water: In 1986, GB/T 6730 first issued 51 national standards for the determination of chemical composition of iron ore: Based on the development of technology and actual production needs, after years of continuous formulation and revision, a relatively complete standard system has been formed: The parts of GB/T 6730 to be published are shown in Appendix A: Determination of total iron content in iron ore EDTA photometric titration Warning---People who use this document need to 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 that the conditions specified in the relevant national standards and regulations are met: 1 Scope This document describes a method for the determination of total iron content in iron ores by photometric titration with EDTA: This document is applicable to the determination of total iron content in natural iron ore, iron concentrate and artificial agglomerate ore (including sintered ore and pelletized ore): (Mass fraction): 30:0%~72:0%: 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 6730:1 Preparation of pre-dried samples for iron ore analysis GB/T 6730:3 Determination of moisture content in iron ore analysis samples - Gravimetric method, Karl Fischer method and mass loss method 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 12805 Laboratory glass instrument burette GB/T 12806 Laboratory glassware single-line volumetric flasks GB/T 12808 Laboratory glassware single-line pipettes 3 Terms and definitions There are no terms or definitions that require definition in this document: 4 Principle 4:1 Method 1---Microwave digestion The sample was decomposed by microwave digestion with a hydrochloric acid-nitric acid-hydrofluoric acid mixed solution, and the solution was diluted with water and adjusted to a The pH is 1, sulfuric acid is used to eliminate the interference of titanium, boric acid is used to reduce the influence of fluorine, and disodium ethylenediaminetetraacetic acid standard solution is used for titration to calculate the total iron content: 4:2 Method 2---Alkali Fusion Method The sample was melted with sodium peroxide-sodium hydroxide, the melt was dissolved with hydrochloric acid-nitric acid, the interference of titanium was eliminated with sulfuric acid, and the sample was masked with ammonium fluoride: Aluminum shielding, use boric acid to eliminate excess fluoride, dilute with water, adjust the test solution to pH 1 with sodium hydroxide, and use disodium ethylenediaminetetraacetic acid as a standard The solution was titrated and the total iron content was calculated: ......


GB/T 6730.73-2016 Iron ores.Determination of total iron content.EDTA photometric titration method ICS 73.060.10 D31 National Standards of People's Republic of China Determination of Iron Content in Iron Ore EDTA photometric titration 2016-02-24 released 2016-11-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China China National Standardization Management Committee released Preface This part is Part VII of GB/T 6730. This part is drafted in accordance with the rules given in GB/T 1.1-2009. This part is made by China Iron and Steel Industry Association. This section is headed by the National Commission on Standardization of Iron Ore and Direct Reductive Iron (SAC/TC317). This part of the drafting unit. Guangdong Entry-Exit Inspection and Quarantine Bureau, Fangchenggang Entry-Exit Inspection and Quarantine Bureau, Shanghai Entry-Exit Inspection and Quarantine Bureau, Gold Industry Information Standards Institute, Baoshan Iron and Steel Co., Ltd., Wuhan Iron and Steel Group Corporation, Maanshan Iron and Steel Co., Ltd., Anshan Iron and Steel Group Group Steel Research Institute, Sun Yat-sen University, METTLER TOLEDO Corporation, Switzerland Wantong China Limited. The main drafters of this part. Zheng Jianguo, Peng Xuebiao, Su Caizhu, Huang Wenxian, Xiao Qian, Zhai Cuiping, Lu Zhenguo, Zhong Zhiguang, Luo Minggui, Chen Zhiping, Li Hongrong, Min Hong, Chen Zhibin, Yu Chengfeng, Wen Xiangdong, Shao Mei, Ling Xiaoxia, Yang Benhua, Wang Yiling, Kang Dehua, Zou Xiaoyong, Wang Zhongguang. Determination of Iron Content in Iron Ore EDTA photometric titration WARNING. Personnel using this section should have practical experience in formal laboratory work. This section does not indicate all possible security issues. It is the responsibility of the user to take appropriate safety and health measures and to ensure compliance with the conditions set forth in the relevant national regulations. 1 Scope This part of GB/T 6730 specifies the total iron content of iron ore by EDTA photometric titration. This section applies to the determination of total iron content in natural iron ore, iron concentrate and artificial lumps, including sinter and pellets. Measuring range (Mass fraction) of 30% to 72%. 2 normative reference documents The following documents are indispensable for the application of this document. For dated references, only the dated edition applies to this article Pieces. For undated references, the latest edition (including all modifications) applies to this document. GB/T 6379.2 Accuracy of measurement methods and results (accuracy and precision) - Part 2. Determination of standard measurement methods The basic method of sex and reproducibility Preparation of pre - dried samples for analysis of iron ore GB/T 6730.1 Representation and Judgment of Numerical Correction Rule and Limit Value of GB/T 8170 GB/T 10322.1 Iron Ore Sampling and Sample Preparation 3 principle Samples in a small amount of hydrofluoric acid solubilizers, the use of hydrochloric acid nitric acid mixed solution microwave digestion method decomposition, cooling, with sodium hydroxide solution adjustment test Liquid pH = 1, with ethylenediamine tetraacetic acid disodium standard titration solution titration, photometric electrode to determine the end of titration, calculate the total iron content. 4 reagent Unless otherwise stated, only the reagents identified as analytical reagents and distilled or deionized water or comparable purity were used in the analysis. 4.1 high purity iron, purity ≥ 99.99%. 4.2 hydrochloric acid nitric acid mixed solution, the amount of 15mL nitric acid (ρ = 1.42g/mL), 45mL hydrochloric acid (ρ = 1.19g/mL) and 40mL water, Mix well. 4.3 hydrofluoric acid solution, 1 100. Remove 1 mL of hydrofluoric acid (ρ = 1.13 g/mL) and add 100 mL of water to the flask. Mix well. 4.4 sodium hydroxide solution, 100g/L. Weigh 100 g of sodium hydroxide, dissolved in 800 mL of water, cooled to room temperature and diluted to 1000 mL. Stored in plastic bottles. 4.5 ethylenediamine tetraacetic acid disodium (C10H14N2Na2O8, referred to as EDTA) standard titration solution, 0.1mol/L. 4.5.1 preparation Weigh 40g ethylenediamine tetraacetic acid disodium, add 800mL water, heat dissolved, cooled, diluted to 1000mL, mix. Stored in plastic Bottle. ......

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