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GB/T 10322.8-2009: Iron ores -- Single-point determination of specific surface area -- Nitrogen adsorption method
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| GB/T 10322.8-2009 | English | 189 |
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Iron ores -- Single-point determination of specific surface area -- Nitrogen adsorption method
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GB/T 10322.8-2009
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Basic data | Standard ID | GB/T 10322.8-2009 (GB/T10322.8-2009) | | Description (Translated English) | Iron ores -- Single-point determination of specific surface area -- Nitrogen adsorption method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | D31 | | Classification of International Standard | 73.060.10 | | Word Count Estimation | 8,830 | | Date of Issue | 2009-10-30 | | Date of Implementation | 2010-05-01 | | Quoted Standard | GB/T 10322.1 | | Regulation (derived from) | National Standard Approval Announcement 2009 No.12 (Total No.152) | | 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 provides a single point measurement method for the determination of the specific surface area of iron ore by nitrogen adsorption method. This section applies to iron ore fine powder. | GB/T 10322.8-2009: Iron ores -- Single-point determination of specific surface area -- Nitrogen adsorption method
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Iron ores. Single-point determination of specific surface area. Nitrogen adsorption method
ICS 73.060.10
D31
National Standards of People's Republic of China
Ore than a single-point surface area measurement
Nitrogen adsorption
Posted 2009-10-30
2010-05-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
GB/T 10322 Appendix A of this part of normative appendix, Appendix B and Appendix C are informative appendices.
This part is proposed by the China Iron and Steel Association.
This part of the National Standardization Technical Committee reduced iron ore and direct centralized.
This part mainly drafted by. Ningbo Inspection and Quarantine Institute of Science and Technology, Metallurgical Industry Information Standards Institute, People's Republic of China
Tianjin CIQ.
The main drafters of this section. Liao Haiping, should pine, Ren Chunsheng, Zhang steel, Chenzi Bin, Gu Songhai.
Ore than a single-point surface area measurement
Nitrogen adsorption
1 Scope
This section GB/T 10322 specifies the measurement method of iron ore by nitrogen adsorption surface area than a single point.
This section applies to iron ore fine powder.
2 Normative references
The following documents contain provisions which, through reference GB/T 10322 in this section constitute provisions of this section. For dated reference documents
Member, all subsequent amendments (not including errata content) or revisions do not apply to this section, however, encouraged to reach under this section
Parties to research agreement to use the latest versions of these documents. For undated reference documents, the latest versions apply to this
section.
GB/T 10322.1 iron ore sampling and sample preparation method (GB/T 10322.1-2000, idtISO 3082.1998)
Principle 3
Samples were placed in liquid nitrogen after degassing treatment bath, nitrogen gas mixture of helium adsorption of nitrogen gas, saturated nitrogen adsorption-desorption, absorption is detected
Nitrogen attached volume, according to the BET equation to calculate the surface area of \u200b\u200bthe sample, or a specific surface area obtained by comparing the standard sample.
4 Reagents
4.1 liquid nitrogen, is not less than the purity 99.99%.
4.2 Nitrogen, not less than 99.99% purity.
Helium 4.3, purity of not less than 99.99%.
4.4 nitrogen helium mixture, mixing the first two purity not less than 99.99%, nitrogen partial pressure of 0.2.
The specific surface area 4.5 standard sample, the specific surface area of \u200b\u200b0.5m2/g ~ 20m2/g is appropriate.
5 instruments and equipment
5.1 The specific surface area tester, mainly by the gas system and the detector composition, based on any principle of BET, to arrive at the correct ratio of surface area analyzer
Is available.
5.2 Balance, accurate to 0.1mg.
5.3 Dewar.
6 Sampling and sample preparation
According to GB/T 10332.1 sampled. Experimental samples without grinding and sieving (also by the parties to agree on the scope of the sample size, screening out of character
Combined sample size requirements).
7 Procedure
Warning. the human body in direct contact with liquid nitrogen can cause severe frostbite during the test should take effective security measures, such as wearing gloves and antifreeze
Goggles.
7.1 Number of measurements
Pre-drying of the same sample measured at least twice in parallel.
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