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| GB/T 6730.51-2023 | English | 309 |
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Iron ores - Determination of carbon content in carbonate - The caustic asbestos absorption gravimetric method
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| GB/T 6730.51-1986 | English | 279 |
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Methods for chemical analysis of iron ores. The caustic asbestos absorption gravimetric method for the determination of carbon content in carbonate
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Basic data
| Standard ID | GB/T 6730.51-2023 (GB/T6730.51-2023) |
| Description (Translated English) | Iron ores - Determination of carbon content in carbonate - The caustic asbestos absorption gravimetric method |
| Sector / Industry | National Standard (Recommended) |
| Classification of Chinese Standard | D31 |
| Classification of International Standard | 73.060.10 |
| Word Count Estimation | 16,189 |
| Date of Issue | 2023-05-23 |
| Date of Implementation | 2023-12-01 |
| Older Standard (superseded by this standard) | GB/T 6730.51-1986 |
| Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration |
GB/T 6730.51-2023: Iron ores - Determination of carbon content in carbonate - The caustic asbestos absorption gravimetric 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.
ICS73:060:10
CCSD31
National Standards of People's Republic of China
Replace GB/T 6730:51-1986
Determination of carbon content in iron ore carbonate
Caustic soda asbestos absorption gravimetric method
Released on 2023-05-23
2023-12-01 implementation
State Administration for Market Regulation
Released by the National Standardization Management Committee
foreword
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 51 of GB/T 6730, see Appendix A for the published parts of GB/T 6730:
This document replaces GB/T 6730:51-1986 "Methods for Chemical Analysis of Iron Ore - Determination of Carbon in Carbonate by Caustic Soda Asbestos Absorption Gravimetric Method"
Compared with GB/T 6730:51-1986, except for structural adjustment and editorial changes, the main technical changes are as follows:
a) Change the measurement range to 0:10%~10:00% (see Chapter 1, paragraph 1 of the text of the 1986 edition);
b) Added normative references GB/T 6682 (see Chapter 5), GB/T 10322:1 (see Chapter 7) and GB/T 8170 (see
9:2:3), delete GB/T 1467-1978 (see paragraph 2 of the text of the 1986 edition);
c) The chapter "Principle" has been added, and the content of the original chapter "Summary of Methods" has been changed and included (see Chapter 4, Chapter 1 of the 1986 edition
chapter);
d) Soda lime and silver vanadate are added to the reagents (see 5:1 and 5:5);
e) The reaction and measurement part of the negative pressure gas supply measurement device has been changed, and the position of the two-way piston has been adjusted (see 6:1, No: 3 of the 1986 edition
chapter);
f) A positive pressure gas supply measurement device is added to the instruments and equipment (see 6:2);
g) Changed the regulations on the number of determinations (see 8:1, 5:1 of the 1986 edition);
h) Added the method of air tightness inspection in positive pressure and negative pressure gas supply devices (see 8:3);
i) Changed the weighing amount and conversion result of the sample in the calibration test (see 8:5, 5:4 of the 1986 edition);
j) The expression of the measurement process has been changed, and the measurement of the positive pressure gas supply device has been added (see 8:6, 5:5 of the 1986 edition);
k) Added the determination of the hygroscopic water content in the sample (see 8:7);
l) Add the deduction of blank value in the calculation formula of carbon content in carbonate (see 9:1, 6:1 of the 1986 edition);
m) Changed the determination and presentation of analysis results (see 9:2:2, 6:2 of the 1986 edition);
n) The chapter "Test Report" has been added (see Chapter 10):
Please note that some contents of this document may refer to patents: The issuing agency of this document assumes no responsibility for identifying patents:
This document is proposed by China Iron and Steel Industry Association:
This document is under the jurisdiction of the National Iron Ore and Direct Reduced Iron Standardization Technical Committee (SAC/TC317):
This document is drafted by: Wuhan Iron and Steel Co:, Ltd:, Lihong Inspection Group Co:, Ltd:, Chengdu Advanced Metal Materials Industry Technology Research Institute
Co:, Ltd:, Metallurgical Industry Information Standard Research Institute, Xiamen Xiaoxun New Energy Technology Co:, Ltd:
The main drafters of this document: Yu Lujun, Zhang Dongxing, Zhou Zheng, Yao Jie, Yu Weihua, Li Jie, Zhang Suizhong, Zhu Rong, Li Jie, Zhu Qian, Chen Peixian,
Yang Zhao, Zheng Feng, Xia Nianping, Wen Bin, Fan Rongchang:
This document was first published in 1986, and this is the first revision:
Introduction
Iron ore is the main raw material for the steel industry: In the standard system in the iron and steel field, the standard system for the determination of the chemical composition of iron ore is
A very important part of it plays an important role in ensuring the quality of iron ore products: This series of method standards serves the iron ore
Production, trade and application provide technical support for the high-quality development of my country's iron and steel industry:
GB/T 6730 includes a series of standards for the determination of the chemical composition of iron ore, respectively specifying the moisture content, total iron, and metal content of iron ore products:
Iron, ferrous, silicon, aluminum, calcium, magnesium, sulfur, phosphorus, manganese, titanium, total rare earths, 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 issued 51 national standards for the determination of chemical composition of iron ore for the first time:
Based on the development of technology and the actual needs of production, after years of continuous revision work, a relatively complete standard system has been formed: Except already issued
In addition to the part published (see Appendix A), the following parts are also planned to be released:
--- Part 84: Determination of Total Rare Earth Inductively Coupled Plasma Atomic Emission Spectrometry;
--- Part 85: Preparation and determination of certified standard samples for chemical analysis;
--- Part 86: Determination of radionuclides Inductively coupled plasma mass spectrometry;
--- Part 87: Determination of total iron and other multi-element content Wavelength dispersive X-ray fluorescence spectrometry (cobalt internal standard method):
Determination of carbon content in iron ore carbonate
Caustic soda asbestos absorption gravimetric method
Caution: Personnel using this document should have practical experience in formal laboratory work: This document does not address all possible security issues:
It is the user's responsibility to take appropriate safety and health measures and ensure compliance with the conditions stipulated in the relevant national laws and regulations:
1 Scope
This document describes a method for the determination of carbon content in carbonates using the caustic soda asbestos absorption gravimetric method:
This document is applicable to the determination of carbon content in carbonates in iron ore, iron concentrate, sinter and pellets: The determination range (mass fraction) is
0:10%~10:00%:
2 Normative references
The contents of the following documents constitute the essential provisions of this document through normative references in the text: Among them, dated references
For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to
this document:
GB/T 6682 Analytical laboratory water specifications and test methods
GB/T 6730:1 Preparation of pre-dried samples for iron ore analysis
GB/T 6730:3 Determination of hygroscopic water in iron ore analysis samples by gravimetric method, Karl Fischer method and mass loss method
GB/T 8170 Numerical rounding off rules and expression and determination of limit values
GB/T 10322:1 Iron ore sampling and sample preparation methods
3 Terms and Definitions
This document does not have terms and definitions that need to be defined:
4 principles
Samples are decomposed with phosphoric acid to remove carbon dioxide dry air (negative pressure supply) or compressed gas without carbon dioxide (positive pressure supply)
As a carrier gas, absorb the generated carbon dioxide with caustic soda asbestos, and calculate the carbon content in the carbonate in the iron ore according to its increased mass:
5 reagents
In the analysis, unless otherwise specified, only the approved reagents of analytical grade and distilled water of grade 3 or above in accordance with the provisions of GB/T 6682 or other
Water of comparable purity:
5:1 Soda lime, particle size 2:5mm~5:0mm, irregular cylindrical particles:
5:2 Caustic soda asbestos, particle size 0:60mm~0:85mm:
5:3 Anhydrous calcium chloride, particle size 2:0mm~5:0mm:
5:4 Anhydrous magnesium perchlorate (or phosphorus pentoxide), particle size 0:85mm~2:00mm, dry in an oven at 180°C for 2 hours, then quickly transfer to dry
Cool in a desiccator for later use: The used magnesium perchlorate can be reused after drying:
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