GB/T 7739.8-2022Methods for chemical analysis of gold concentrates—Part 8: Determination of sulfur content (English PDF)

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 8 of GB/T 7739 "Methods for Chemical Analysis of Gold Concentrates". GB/T 7739 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 7739.8-2007 "Methods for Chemical Analysis of Gold Concentrates - Part 8: Determination of Sulfur Content", and GB/T 7739.8- Compared with.2007, except for structural adjustment and editorial changes, the main technical changes are as follows.

a) Delete the requirement of "allowable difference" (see 2.6, 3.7 of the 2007 edition);

b) The amount of mixed solvents used in method 1 has been increased (see 4.5.3, 2.4.3 of the 2007 edition);

c) The ignition temperature of method 1 has been changed (see 4.5.3, 2.4.3 of the 2007 edition);

d) Added "repeatability" and "reproducibility" requirements (see 4.7, 5.7, 6.7);

e) Changed the intake method of method 2 (see 5.5.3, 3.5.3 of the 2007 edition);

f) Added the determination of available sulfur (see Chapter 6).

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 for enterprises to optimize the control parameters of the dressing and smelting process, accurately control the consumption of chemicals, and reduce the concentration and enrichment of impurity elements in gold concentrate ore dressing and smelting.

The interference of the purification process and the improvement of the comprehensive recovery rate of each valuable element can contribute to the efficient recycling and sustainable utilization of comprehensive resources in the entire gold industry.

Provide stronger technical support for the sustainable green and healthy development and the construction of smart mines. 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.

1 Scope

This document specifies the method for the determination of sulfur content and available sulfur content in gold concentrate.

This document is applicable to the determination of sulfur content and available sulfur content in gold concentrate. Measuring range. the mass fraction is 5.00%~50.00%.

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.

4 Method 1 barium sulfate gravimetric method