Search result: GB/T 7739.7-2022 (GB/T 7739.7-2007 Older version)
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| GB/T 7739.7-2022 | English | 199 |
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Methods for chemical analysis of gold concentrates - Part 7: Determination of iron content
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GB/T 7739.7-2022
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| GB/T 7739.7-2007 | English | 239 |
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Methods for chemical analysis of gold concentrates -- Part 7: Determination of iron contents
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GB/T 7739.7-2007
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| Standard ID | GB/T 7739.7-2022 (GB/T7739.7-2022) | | Description (Translated English) | Methods for chemical analysis of gold concentrates -- Part 7: Determination of iron content | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | D46 | | Classification of International Standard | 73.060.99 | | Word Count Estimation | 10,154 | | Date of Issue | 2022-12-30 | | Date of Implementation | 2023-07-01 | | Older Standard (superseded by this standard) | GB/T 7739.7-2007 |
GB/T 7739.7-2022
ICS 73.060.99
CCSD46
National Standards of People's Republic of China
Replacing GB/T 7739.7-2007
Gold Concentrate Chemical Analysis Methods
Part 7.Determination of iron content
Posted on 2022-12-30
2023-07-01 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 7 of GB/T 7739.GB/T 7739 "Methods for Chemical Analysis of Gold Concentrates" has released the following 13 parts.
--- Part 1.Determination of the amount of gold and silver;
--- Part 2.Determination of silver content by flame atomic absorption spectrometry;
--- Part 3.Determination of the amount of arsenic;
--- Part 4.Determination of copper content;
--- Part 5.Determination of lead content;
--- Part 6.Determination of zinc content;
--- Part 7.Determination of iron content;
--- Part 8.Determination of sulfur content;
--- Part 9.Determination of carbon content;
--- Part 10.Determination of antimony content;
--- Part 12.Determination of the amount of arsenic, mercury, cadmium, lead and bismuth atomic fluorescence spectrometry;
--- Part 13.Determination of the amount of lead, zinc, bismuth, cadmium, chromium, arsenic and mercury by inductively coupled plasma atomic emission spectrometry;
--- Part 14.Determination of the amount of thallium Inductively coupled plasma atomic emission spectrometry and inductively coupled plasma mass spectrometry.
This document replaces GB/T 7739.7-2007 "Methods for Chemical Analysis of Gold Concentrates Part 7.Determination of Iron Content", and GB/T 7739.7-
Compared with.2007, except for structural adjustment and editorial changes, the main technical changes are as follows.
a) Modify the determination range of iron (see Chapter 1, Chapter 1 of the.2007 edition);
b) The determination method has been modified, mercury dichloride has been deleted, and it has been changed to stannous chloride-titanium trichloride reduction (see 8.3.8,.2007 edition
5.3.3);
c) Added interference elimination methods (see 8.3.8);
d) The calculation formula has been changed [see formula (1), formula (2) of the.2007 edition];
e) Delete the requirement of "allowable difference" (see Chapter 7 of the.2007 edition);
f) Increased "repeatability" and "reproducibility" requirements (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 and managed by the National Gold Standardization Technical Committee (SAC/TC379).
This document is drafted by. Changchun Gold Research Institute Co., Ltd., Henan Zhongyuan Gold Smelter Co., Ltd., Changchun National Inspection (Jiyuan)
Testing Technology Co., Ltd., Shenzhen Gold Gold and Silver Jewelry Inspection and Research Center Co., Ltd., SDIC Jincheng Metallurgy Co., Ltd., North Mining Inspection Co., Ltd.
Testing Technology Co., Ltd., Lingbao Gold Group Co., Ltd. Gold Smelting Branch, Zijin Mining Group Co., Ltd., Zhaojin Mining
Co., Ltd. Jinchiling Gold Mine.
The main drafters of this document. Chen Yonghong, Zhang Yue, Yang Xing, Lu Xingen, Meng Xianwei, Hong Bo, Tian Jing, Sun Tingting, Wang Danyang, Zhong Yingnan, Mu Yan,
Du Yuanyuan, Wang Qingli, Miao Xiaohuan, Zhu Yansheng, Luo Xiufen, Xu Zhongmin, Yang Yongwen.
This document was first published in.2007, and this is the first revision.
introduction
After the raw ore has been sorted and processed, its main components have been enriched in the concentrate, and at the same time, the secondary components of the ore or other associated metals have also been obtained.
From recovery to recovery, GB/T 7739 "Chemical Analysis Methods of Gold Concentrate" aims to help gold industrial and mining enterprises to accurately understand the main components and impurities of gold concentrate
It is beneficial to optimize the control parameters of the dressing and smelting process, precisely control the consumption of reagents, reduce the interference of impurity elements on the smelting and purification process, and improve the
The comprehensive recovery rate of valuable elements can contribute to the efficient recycling of resources in the entire gold industry, sustainable green and healthy development, and the development of smart mines.
Construction provides technical support. GB/T 7739 consists of 13 parts.
--- Part 1.Determination of the amount of gold and silver. The purpose is to specify the fire test gold gravimetric method, activity
Charcoal enrichment-flame atomic absorption spectrometry and activated carbon enrichment-iodometric method and the applicable measurement range of each method.
--- Part 2.Determination of the amount of silver flame atomic absorption spectrometry. The purpose is to specify the flame atom for the determination of the amount of silver in gold concentrate
Absorption Spectrometry and Applicable Measurement Range.
--- Part 3.Determination of the amount of arsenic. The purpose is to specify the silver diethyldithiocarbamate spectrophotometric method for the determination of arsenic in gold concentrate
Degree method and potassium dichromate titration method and applicable measurement range of each method.
--- Part 4.Determination of the amount of copper. The purpose is to specify the method of flame atomic absorption spectrometry and thiosulfuric acid for the determination of copper in gold concentrate
Sodium iodide method and the applicable measurement range of each method.
--- Part 5.Determination of the amount of lead. The purpose is to specify the method of atomic absorption spectrometry and ethylenediaminetetraacetic acid for the determination of lead in gold concentrate
Disodium titration method and applicable measurement range of each method.
--- Part 6.Determination of the amount of zinc. The purpose is to specify the method of atomic absorption spectrometry and ethylenediaminetetraacetic acid for the determination of zinc in gold concentrate
Disodium titration method and applicable measurement range of each method.
--- Part 7.Determination of iron content. The purpose is to specify the potassium dichromate titration method and applicable determination methods for the determination of iron content in gold concentrate
scope.
--- Part 8.Determination of sulfur content. The purpose is to specify the barium sulfate gravimetric method and the combustion-acid-base titration method for the determination of sulfur in gold concentrate
And the applicable measurement range of each method.
--- Part 9.Determination of carbon content. The purpose is to specify the ethanol-ethanolamine-potassium hydroxide titration method and method for the determination of carbon content in gold concentrate
Applicable measurement range.
--- Part 10.Determination of the amount of antimony. The purpose is to specify the cerium sulfate titration method and the hydride generation-principle method for the determination of antimony in gold concentrate
Sub-fluorescence spectroscopy and the applicable measurement range of each method.
--- Part 12.Determination of the amount of arsenic, mercury, cadmium, lead and bismuth atomic fluorescence spectrometry. The purpose is to regulate the arsenic, mercury, cadmium,
Hydride generation-atomic fluorescence spectrometry for the determination of lead and bismuth and its applicable measurement range.
--- Part 13.Determination of the amount of lead, zinc, bismuth, cadmium, chromium, arsenic and mercury Inductively coupled plasma atomic emission spectrometry. The purpose is
Inductively coupled plasma atomic emission spectrometry for the determination of lead, zinc, bismuth, cadmium, chromium, arsenic and mercury in specified gold concentrates and its application
range of measurement.
--- Part 14.Determination of the amount of thallium Inductively coupled plasma atomic emission spectrometry and inductively coupled plasma mass spectrometry. head
Inductively Coupled Plasma Atomic Emission Spectrometry and Inductively Coupled Plasma Mass Spectrometry for the Determination of Thallium in Gold Concentrates
method and the applicable measurement range of each method.
Gold Concentrate Chemical Analysis Methods
Part 7.Determination of iron content
1 Scope
This document specifies a method for the determination of the amount of iron in gold concentrates.
This document applies to the determination of the amount of iron in gold concentrate. Measuring range. the mass fraction is 1.00%~40.00%.
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 17433 Basic Terms for Chemical Analysis of Metallurgical Products
3 Terms and Definitions
The following terms and definitions defined in GB/T 17433 apply to this document.
3.1
laboratory sample laboratorysample
A sample prepared for sending to a laboratory for examination or testing.
[Source. GB/T 17433-2014, 2.3.2.1]
3.2
sample testsample
A sample that is further prepared from a laboratory sample and can be weighed.
[Source. GB/T 17433-2014, 2.3.2.2]
3.3
Sample testportion
A certain amount of sample weighed for inspection or observation.
[Source. GB/T 17433-2014, 2.3.2.3]
4 principles
Dissolve the sample with hydrochloric acid, nitric acid, and sulfuric acid. When the copper content is greater than 1 mg, use ammonia water-ammonium chloride to precipitate iron and separate copper from the matrix.
In the medium, stannous chloride reduced most of the iron, and the remaining small amount of iron was reduced by titanium trichloride with sodium tungstate as indicator. Add sulfur-phosphorus mixed acid to di
Sodium aniline sulfonate was used as indicator, and it was titrated with potassium dichromate standard titration solution.
5 Reagents or Materials
Unless otherwise stated, only reagents and distilled or deionized water or water of equivalent purity should be used in the test confirmed to be of analytical grade.
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