GB/T 7739.5-2021Methods for chemical analysis of gold concentrates—Part 5: Determination of lead content (English PDF)

Foreword

This document was drafted in accordance with GB/T 1.1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules of Standardization Documents".

This document is Part 5 of GB/T 7739. GB/T 7739 "Methods for Chemical Analysis of Gold Concentrates" has published the following 14 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 arsenic content;

---Part 4: Determination of copper content;

---Part 5: Determination of lead content;

---Part 6: Determination of the amount of zinc;

---Part 7: Determination of iron content;

---Part 8: Determination of sulfur content;

---Part 9: Determination of carbon content;

---Part 10: Determination of the amount of antimony;

---Part 11: Determination of the amount of arsenic and bismuth;

---Part 12: Determination of arsenic, mercury, cadmium, lead and bismuth content by atomic fluorescence spectrometry;

---Part 13: Determination of lead, zinc, bismuth, cadmium, chromium, arsenic and mercury content 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 7739.5-2007 "Methods of Chemical Analysis of Gold Concentrate Part 5: Determination of Lead Content", and is in line with GB/T 7739.5-2007 Compared with 2007, in addition to structural adjustments and editorial changes, the main technical changes are as follows.

a) In Method 1, the measurement range is adjusted from "0.50%~5.00%" to "0.10%~5.00%" (see Chapter 1, Chapter 2 of the 2007 edition) chapter);

b) In Method 2, the measurement range is adjusted from "5.00%~40.00%" to "5.00%~50.00%" (see Chapter 1, Chapter 1, 2007 edition) Chapter 3);

c) Deleted the "allowable difference" requirement (see 2007 version of 2.7, 3.6);

d) The method of sample digestion and interference elimination has been changed (see 4.5.3.1, 5.5.3, 2.5.3.1, 3.4.3 of the 2007 edition);

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

f) In Method 2, the correction of the lead content in the filtrate has been added (see 5.5.3.6).

Introduction

After the raw ore has been processed by the sorting operation, its main components have been enriched in the concentrate, and the minor components of the ore or other associated metals have also been obtained.

When it comes to recycling, GB/T 7739 "Gold Concentrate Chemical Analysis Method" aims to help gold industrial and mining enterprises accurately understand the main components and impurities of gold concentrate The content is conducive to optimizing the control parameters of the dressing and smelting process, accurately controlling the consumption of reagents, reducing the interference of impurity elements on the smelting and purification process, and improving the The comprehensive recovery rate of valuable elements can contribute to the efficient recycling of resources of the entire gold industry, sustainable green and healthy development, and smart mines.

Construction provides technical support. GB/T 7739 is composed of 15 parts.

---Part 1: Determination of the amount of gold and silver. The purpose is to specify the fire assay gravimetric method and activity for the determination of the amount of gold and silver in the gold concentrate Carbon enrichment-flame atomic absorption spectrometry and activated carbon enrichment-iodometry 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 silver content in gold concentrate Absorption spectroscopy and applicable measurement range.

---Part 3: Determination of arsenic content. The purpose is to specify the silver diethyldithiocarbamate spectrophotometer for the determination of arsenic in gold concentrate Degree method and potassium dichromate titration method and the applicable measurement range of each method.

---Part 4: Determination of copper content. The purpose is to specify flame atomic absorption spectrometry and thiosulfuric acid for the determination of copper in gold concentrate Sodium titration method and the applicable measurement range of each method.

---Part 5: Determination of lead content. The purpose is to specify flame atomic absorption spectrometry and ethylenediamine tetrachloride for the determination of lead in gold concentrate. The disodium acetate titration method and the applicable measurement range of each method.

---Part 6: Determination of the amount of zinc. The purpose is to specify flame atomic absorption spectrometry and ethylenediamine tetrachloride for the determination of zinc in gold concentrate. The disodium acetate titration method and the applicable measurement range of each method.

---Part 7: Determination of iron content. The purpose is to specify the potassium dichromate titration method for the determination of iron in gold concentrates and the applicable determination Scope.

---Part 8: Determination of sulfur content. The purpose is to specify the barium sulfate gravimetric method and combustion-acid-base titration for the determination of sulfur in gold concentrate Method 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 for the determination of carbon in gold concentrates and 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 method for the determination of antimony in gold concentrates. Sub-fluorescence spectroscopy and the applicable measurement range of each method.

---Part 11: Determination of the amount of arsenic and bismuth. The purpose is to specify the hydride generation for the determination of the amount of arsenic and bismuth in the gold concentrate-atom Fluorescence spectroscopy and applicable measurement range.

---Part 12: Determination of arsenic, mercury, cadmium, lead and bismuth content by atomic fluorescence spectrometry. The purpose is to regulate arsenic, mercury, cadmium, Hydride generation-atomic fluorescence spectrometry for the determination of lead and bismuth content and the applicable measurement range.

--- Part 13: Determination of lead, zinc, bismuth, cadmium, chromium, arsenic and mercury content inductively coupled plasma atomic emission spectrometry. Aim at Inductively coupled plasma atomic emission spectrometry for the determination of lead, zinc, bismuth, cadmium, chromium, arsenic and mercury in gold concentrates and its application The measurement range.

---Part 14: Determination of the amount of thallium inductively coupled plasma atomic emission spectrometry and inductively coupled plasma mass spectrometry. Item It is the inductively coupled plasma atomic emission spectrometry and inductively coupled plasma mass spectrometry for the determination of thallium in gold concentrate Method and the applicable measurement range of each method.

1 Scope

This document specifies the method for determining the amount of lead in gold concentrate.

This document includes two measurement methods. Method 1 and Method 2. Method 1 is suitable for the determination of the amount of lead in gold concentrate, the measurement range. 0.10%~ 5.00%; Method 2 is suitable for the determination of lead content in gold concentrates with barium content less than 1%, and the measurement range. >5.00%~50.00%.

2 Normative references

The contents of the following documents constitute the indispensable clauses of this document through normative references in the text. Among them, dated quotations Only the version corresponding to that 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 terminology for chemical analysis of metallurgical products

3 Terms and definitions

The terms and definitions defined in GB/T 17433 apply to this document.

4 Method 1: Flame atomic absorption spectrometry