GB/T 6730.17-2014 English PDF

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GB/T 6730.17-2014: Iron ores -- Determination of sulfur content -- Combustion iodometric method
Status: Valid

GB/T 6730.17: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 6730.17-2014	209	Add to Cart	3 days	Iron ores -- Determination of sulfur content -- Combustion iodometric method	Valid
GB/T 6730.17-1986	399	Add to Cart	3 days	Methods for chemical analysis of iron ores--The combustion iodometric method for the determination of sulfur content	Obsolete

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GB/T 6730.2   GB/T 6730.1   GB/T 6730.11   GB/T 6730.23   GB/T 6730.24   GB/T 6730.25   

Basic data

Standard ID: GB/T 6730.17-2014 (GB/T6730.17-2014)
Description (Translated English): Iron ores -- Determination of sulfur content -- Combustion iodometric method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: D31
Classification of International Standard: 73.060.10
Word Count Estimation: 9,937
Date of Issue: 9/30/2014
Date of Implementation: 5/1/2015
Older Standard (superseded by this standard): GB/T 6730.17-1986
Quoted Standard: GB/T 6682; GB/T 6730.1; GB/T 6730.3; GB/T 10322.1
Regulation (derived from): People's Republic of China Announcement of Newly Approved National Standards 2014 No. 22
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 determination of sulfur content in iron ore by combustion iodometric method. This section applies to natural iron ore, the determination of iron ore, sinter and pellets sulfur content. Measurement range (mass fraction): 0.0020%

GB/T 6730.17-2014: Iron ores -- Determination of sulfur content -- Combustion iodometric method

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Iron ores. Determination of sulfur content. Combustion iodometric method ICS 73.060.10 D31 National Standards of People's Republic of China Replacing GB/T 6730.17-1986 Determination of iron ore sulfur content - Combustion iodometric method Issued on. 2014-09-30 2015-05-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

GB/T 6730 "iron ore" is divided into 64 sections. This is Part 17 GB/T 6730's. This section drafted in accordance with GB/T 1.1-2009 given rules. This Part replaces GB/T 6730.17-1986 "chemical analysis of iron combustion iodometric method for the determination of sulfur content." This portion GB/T 6730.17-1986 compared, in addition to editorial changes, the major technical changes are as follows. --- Increase Warnings section; --- Increasing the normative references; --- Standard "1220 ℃ ± 20 ℃ high temperature furnace" was changed to "1250 ℃ ± 20 ℃ high temperature furnace"; The method of reagent preparation with tungsten trioxide tungsten --- Standard deleted; --- Standard reagent "potassium iodide (3%)" was changed to "potassium iodide solution, 30g/L"; --- Standard reagent "starch solution (2%)" was changed to "starch solution, 20g/L"; --- Standard equipment increased 7 "NOTE. porcelain porcelain boat and boat cover should be at 1250 ℃ ± 20 ℃ high temperature furnace burning, to reduce the blank value"; --- Increased 8.3 oxide conversion factor; --- An increase of 9 test report. 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 part of the main drafting unit. Anshan Iron and Steel Group Mining Company, Shanghai Exit Inspection and Quarantine, Maanshan Iron & Steel Co., Ltd., metallurgy Industry Information Standards Institute. The main drafters of this section. Li Yulin, Chen Zhihua, GAO Jing Jun, Ren Liping, Cheng Jianping, Sun Deming, Yao Qiang. This part of the standard replaces the previous editions are. --- GB/T 1368-1978, GB/T 6730.17-1986. Determination of iron ore sulfur content - Combustion iodometric method Warning. Use of this section shall be a person experiences regular laboratory work. This section does not indicate that all possible security issues. Users have the responsibility to take appropriate safety and health practices and to ensure compliance with the conditions relevant national regulations.

1 Scope

GB/T 6730 This section specifies the determination of sulfur content in iron ore by combustion iodometric method. This section applies to natural iron ore, iron ore measuring, sinter and pellets sulfur content. Measurement range (mass fraction). 0.0020% to 0.50%.

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. Laboratory use specifications and test methods GB/T 6682 Analysis GB/T 6730.1 Method for analysis of chemical analysis of iron pre-dried sample preparation GB/T 6730.3 chemical analysis of iron gravimetric method for the determination of hygroscopic moisture in analytical samples GB/T 10322.1 iron ore sampling and sample preparation methods Principle 3 The sample was mixed with tungsten trioxide, nitrogen as a carrier gas, heated at 1250 ℃ ± 20 ℃ high temperature furnace. The resulting sulfur dioxide Gas with dilute hydrochloric acid solution containing potassium iodide and starch absorption, absorbed in the process of continuous precipitation with potassium iodate standard solution titration, by consuming Volume of potassium iodate solution to calculate the sulfur content of the sample.

4 Reagents

Analysis Unless otherwise stated, use only reagents of recognized analytical grade and meet the two water GB/T 6682 regulations. 4.1 tungsten trioxide solids (less than 0.001% sulfur content). Tungsten trioxide should be heated at a temperature of pretreatment 2h 700 ℃ ± 20 ℃, to reduce Low blank value. 4.2 hydrochloric acid, 166. 4.3 potassium iodide solution, 30g/L. 4.4 starch solution, 20g/L. Weigh 2g starch, adding 10mL water to form a suspension, stirring was added 50mL boiling water, then was added 30mL Saturated boric acid, 4 drops ~ 5 drops of hydrochloric acid (ρ = 1.19g/mL), was cooled, was diluted to 100mL, and mix until the precipitate, supernatant used. 4.5 potassium iodate standard solution, 0.001042mol/L. Weigh 0.2230g advance at 105 ℃ ~ 110 ℃ bake 2h and placed in a desiccator Cooled to room temperature reference reagent potassium iodate is dissolved in water and transferred to 1000mL volumetric flask, dilute with water to volume, and mix. This solution 1mL Equivalent to 0.10mg sulfur.

5 Instruments

Combustion apparatus is shown in Figure 1. include. a) 1 --- nitrogen cylinder (purity greater than 95%). ......

Image     

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