GB/T 4701.8-2009 English PDF

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GB/T 4701.8-2009: Ferrovanadium -- Determination of carbon content -- The infrared absorption method
Status: Valid

GB/T 4701.8: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 4701.8-2009	139	Add to Cart	3 days	Ferrovanadium -- Determination of carbon content -- The infrared absorption method	Valid
GB/T 4701.8-1988	199	Add to Cart	2 days	Methods for chemical analysis of ferrotitanium--The infrared absorption method for the determination of carbon content	Obsolete

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Basic data

Standard ID: GB/T 4701.8-2009 (GB/T4701.8-2009)
Description (Translated English): Ferrovanadium -- Determination of carbon content -- The infrared absorption method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: H11
Classification of International Standard: 77.100
Word Count Estimation: 6,655
Date of Issue: 2009-07-08
Date of Implementation: 2010-04-01
Older Standard (superseded by this standard): GB/T 4701.8-1988
Regulation (derived from): National Standard Approval Announcement 2009 No.9 (Total No.149)
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 the carbon content of iron chin infrared absorption method. This section applies to the determination of the carbon content of the iron chin.

GB/T 4701.8-2009: Ferrovanadium -- Determination of carbon content -- The infrared absorption method

---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.
Ferrovanadium.Determination of carbon content.The infrared absorption method ICS 77.100 H11 National Standards of People's Republic of China Replacing GB/T 4701.8-1988 Determination of the carbon content of ilmenite The infrared absorption method Posted 2009-07-08 2010-04-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This Part replaces GB/T 4701.8-1988 "Determination of the amount of carbon chemical analysis of ferrotitanium The infrared absorption method." This portion of the GB/T 4701.8-1988 comparison, the main changes are. --- Allow the difference between the first gear modifications ≤0.025% 0.010% to 0.025%. This part is proposed by the China Iron and Steel Association. This part of pig iron and ferroalloy by the National Standardization Technical Committee. This section is drafted. Sichuan Investment Emei Ferroalloy (Group) Co., Ltd. The main drafters of this section. should Tang Hua, Fang Yan, Jiang Xiaohong. This part of the standard replaces the previous editions are. --- GB/T 4701.8-1988. Determination of the carbon content of ilmenite The infrared absorption method Warning --- Use this section shall be a person experiences regular laboratory work. This section does not point out all possible security asked question. Users have the responsibility to take appropriate safety and health practices and to ensure compliance with the conditions relevant national regulations.

1 Scope

This section specifies the determination of the carbon content of ilmenite by infrared absorption method. This section applies to the determination of the carbon content of ilmenite. Measurement range (mass fraction). 0.010% - 0.400%.

2 Normative references

The following documents contain provisions which, through reference in this text, constitute provisions of this part. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this section, however, encourage the parties to this part of the research agreement Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this section. GB/T 4010 alloy chemical analysis and preparation of samples Principle 3 The sample is heated in a high frequency induction furnace combustion flow of oxygen, carbon dioxide generated by the oxygen contained in the measuring chamber to infrared analysis of carbon dioxide The absorption of a specific wavelength of infrared energy absorbed is proportional to its concentration can accept the change in energy can be measured according to the amount of carbon detector.

4 Reagents and materials

4.1 acetone, carbon residue after evaporation was less than 0.0005%. 4.2 Magnesium perchlorate anhydrous, granular. 4.3 asbestos caustic soda, granular. 4.4 glass wool. 4.5 tungsten particles, the amount of carbon is less than 0.002%, particle size of 0.8mm ~ 1.4mm. 4.6 tin particles, carbon content less than 0.002%, particle size 0.4mm ~ 0.8mm. When necessary, clean the surface with acetone, and dried at room temperature. 4.7 oxygen purity of more than 99.95%, if other levels of oxygen to obtain a low and consistent blank, can also be used. 4.8 Dynamic air, nitrogen or compressed air, which contaminants (oil and water) content of less than 0.5%. 4.9 porcelain crucible, diameter × height. 23mm × 23mm or 25mm × 25mm, and fired at a high temperature above 1200 ℃ furnace 4h or through an oxygen burning to white is lowest.

5 instruments and equipment

5.1 Dingtan infrared absorption instrument (sensitivity of 0.1 × 10-6), which means as shown in Figure 1. 5.1.1 washing bottle, the contents of caustic soda asbestos (4.3). 5.1.2 drying tube, built magnesium perchlorate (4.2). 5.2 gas source 5.2.1 The carrier gas container system comprising oxygen, two pressure regulators and ensure the provision of appropriate timing control section and pressure rated flow. 5.2.2 power source system includes a gas powered gas (nitrogen or air) two-stage pressure regulator and ensure the provision of appropriate pressure and rated flow The timing control section. ......

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