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GB/T 6730.70-2013 English PDF

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GB/T 6730.70-2013: Iron ores -- Determination of total iron content -- Titrimetric method after tin (Ⅱ) chloride reduction
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GB/T 6730.70-2013English329 Add to Cart 3 days [Need to translate] Iron ores -- Determination of total iron content -- Titrimetric method after tin (Ⅱ) chloride reduction Valid GB/T 6730.70-2013

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Basic data

Standard ID GB/T 6730.70-2013 (GB/T6730.70-2013)
Description (Translated English) Iron ores -- Determination of total iron content -- Titrimetric method after tin (��) chloride reduction
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard D31
Classification of International Standard 73.060.10
Word Count Estimation 14,148
Quoted Standard GB/T 6682; GB/T 6730.1; GB/T 6730.3; GB/T 10322.1; GB/T 12805; GB/T 12806; GB/T 12808; GB/T 12810
Adopted Standard ISO 2597-1-2006, MOD
Regulation (derived from) National Standards Bulletin 2013 No. 6
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary This standard specifies the stannous chloride reduction of ferric iron after titration using potassium dichromate total iron content in iron ore. This section applies to natural iron ore, iron ore concentrate and build blocks, including sintered products

GB/T 6730.70-2013: Iron ores -- Determination of total iron content -- Titrimetric method after tin (Ⅱ) chloride reduction


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Iron ores. Determination of total iron content. Titrimetric method after tin (Ⅱ) chloride reduction ICS 73.060.10 D31 National Standards of People's Republic of China Determination of total iron content of iron ore Stannous chloride reduction titration Titrimetricmethodaftertin (Ⅱ) chloridereduction [ISO 2597-1.2006, IronOres-Determinationoftotalironcontent- Part 1. Titrimetricmethodaftertin (Ⅱ) chloridereduction, MOD] Issued on. 2013-05-09 2014-02-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This section drafted in accordance with GB/T 1.1-2009 given rules. This section uses the translation method to modify the use of ISO 2597-1.2006 "Determination of total iron ore content - Part 1. Stannous also Original titration. " In addition to this part of the normative references replaced by international standard documents of the file, the structure and content of international technical standards ISO 2597-1.2006 agreement. This part is proposed by the China Iron and Steel Association. This part of the National Iron ore and direct reduced iron Standardization Technical Committee (SAC/TC317) centralized. This section was drafted by. People's Republic of China Shanghai Entry-Exit Inspection and Quarantine Bureau of Metallurgical Industry Information Standards Institute. The main drafters of this section. Wang Kai, Ren Liping, Li Chen, Cai Jing, Chen Zibin. Determination of total iron content of iron ore Stannous chloride reduction titration WARNING --- This section may relate to the safety of hazardous substances, hazardous operations and equipment. This section does not point out all possible security problem. Users have the responsibility to take appropriate safety and health practices and to ensure compliance with the relevant national legislation requirements.

1 Scope

This section provides stannous chloride reduction of ferric iron in total iron content was measured by potassium dichromate titration after. This section applies to natural iron ore, iron ore concentrate, and agglomeration, including the determination of total iron content of the sintered product, the measurement range (mass fraction). 30% to 72%.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document. GB/T 6682 analytical laboratory use specifications and test methods (GB/T 6682-2008, ISO 3696. 1987, MOD) GB/T 6730.1 Methods for chemical analysis of iron pre-dried sample was prepared using (GB/T 6730.1-1986, ISO 7764. 1985, IDT) GB/T 6730.3 chemical analysis of iron gravimetric method for the determination of hygroscopic moisture in analytical samples (GB/T 6730.3-1986, ISO 2596. 1984, IDT) GB/T 10322.1 iron ore sampling and sample preparation method (GB/T 10322.1-2000, ISO 3082.1998, IDT) GB/T 12805 Laboratory glassware burette (GB/T 12805-1991, ISO 385. 1984, NEQ) GB/T 12806 Laboratory glassware single marking flask (GB/T 12806-1991, ISO 1042. 1983, MOD) GB/T 12808 standard laboratory glassware single line pipette (GB/T 12808-1991, ISO 648. 1977, MOD) GB/T 12810 Laboratory glassware gauge capacity calibration and use (GB/T 12810-1991, ISO 4787. 1984, IDT) Principle 3 Sample decomposition according to the following methods. a) of vanadium is not more than 0.05% (mass fraction), molybdenum-containing not more than 0.1% (mass fraction) or copper is not greater than 0.1% (mass fraction Number) samples, like acid-soluble salt, after filtration residue burning with hydrofluoric acid and sulfuric acid to remove silica, fused with potassium pyrosulfate melt. The melt was dissolved in hydrochloric acid, add ammonia to precipitate the iron, again adding hydrochloric acid to dissolve the precipitate, the solution was incorporated into the main solution. b) for samples containing more than 0.05% vanadium (mass fraction), with a base melt, melt water leaching and filtration, the filtrate was discarded, washed with hydrochloric acid Dissolved acidification. Reduction with stannous chloride solution, ferric, mercuric chloride with an excess of stannous oxide. Diphenylamine as an indicator solution of sodium with potassium dichromate standard titration solution, titration reduced iron.

4 Reagents

Analysis uses only recognized analytical reagent, use only in line with GB/T 6682 provisions of secondary water.

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