YS/T 461.10-2013Methods for chemical analysis of lead and zinc bulk concentrates. Part 10: The determination of gold and silver contents. Fire-assaying methods (English PDF)

Foreword

YS/T 461 "Lead and Zinc concentrates - Methods" is divided into 11 parts.

--- Part 1. Determination of the amount of lead and zinc content Na2EDTA precipitation titration;

--- Part 2. Determination of iron content Na2EDTA titration;

--- Part 3. Determination of sulfur content of combustion - neutralization titration method;

--- Part 4. Determination of arsenic content of iodine titration;

--- Part 5. Determination of silicon dioxide content - Molybdenum blue spectrophotometric method;

--- Part 6. Determination of the amount of mercury atomic fluorescence spectrometry;

--- Part 7. Determination of cadmium content by flame atomic absorption spectrometry;

--- Part 8. Determination of copper content - Flame atomic absorption spectrometry;

--- Part 9. Determination of the amount of silver by flame atomic absorption spectrometry;

--- Part 10. the amount of gold and silver contents - fire assay;

--- Part 11. arsenic, bismuth, cadmium, cobalt, copper, nickel, antimony content - Inductively Coupled Plasma - Atomic Emission Spectrometry.

This section YS/T Part 10 461.

This section drafted in accordance with GB/T 1.1-2009 given rules.

The partial replacement of YS/T 461.10-2003 "Lead and Zinc concentrates - Methods for chemical analysis of gold - Determination of the amount of silver fire assay" Compared with YS/T 461.10-2003, the main changes are as follows.

--- Text format has been modified;

--- Increase secondary assaying correction method;

--- Added "reproducibility" clause, delete the words "to allow poor" clause;

--- Added "the test report" requirement.

The non-ferrous metal part by the National Standardization Technical Committee (SAC/TC243) centralized.

YS/T 461 is responsible for drafting. Shenzhen Lingnan Nonferrous Metals Co., Baiyin Nonferrous Metals Group Co., Ltd., Beijing General Research Institute of Mining and Metallurgy.

This section is responsible for drafting. Shenzhen Lingnan Nonferrous Metals Co., Ltd. Shaoguan smelter.

Participated in the drafting of this section. Baiyin Nonferrous Metals Group Co., Ltd., Daye Nonferrous Metals Group Holdings Co., Ltd., Zhuzhou Smelter set Group Co., Ltd., MCC Huludao Nonferrous Metals Group Co., Ltd., Hunan Nonferrous Metal Research Institute, Beijing General Research Institute of Mining and Metallurgy.

1 Scope

This section YS/T 461 specifies the method for determination of the amount of mixing zinc concentrates gold and silver content.

This section applies to the determination of the amount of mixing zinc concentrates gold and silver content. Measurement range. Silver. 500g/t ~ 3000g/t; gold. 0.5g/t ~ 15.0g/t.

2 Method summary

After sample ingredients, high temperature melting, in order to capture the lead in a sample of the formation of lead and silver buckle, and other substances flux generated in a sample of molten eutectic Slag. Made silver and gold by cupellation with lead separation to give a combined gold and silver grains. Gold is insoluble in nitric acid utilizing the nature of the gold, silver separation. By gravimetric method Gold and silver content.

3 Reagents

Unless otherwise indicated in the analysis using only recognized as analytical grade reagents and distilled or deionized water or equivalent purity.

3.1 Sodium glass frit. Industrial pure, powder.

3.2 Borax. Industrial pure, powder.

Anhydrous sodium carbonate 3.3. Industrial pure, powder.