GB/T 26308-2026Recycled silver raw material (English PDF)

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents".

This document replaces GB/T 26308-2010 "Classification and Technical Conditions for Silver Waste". Compared with GB/T 26308-2010, the main differences are in the structural design.

Aside from integration and editorial changes, the main technical changes are as follows.

a) The scope of application of the document has been changed to "applicable to enterprises engaged in domestic and international trade, as well as those involved in the smelting of recycled non-ferrous metals and the processing of precious metals." The phrase "silver waste" has been changed to "applicable to the recycling of silver raw materials (including primary silver resources from mining, beneficiation, smelting, manufacturing, and use of silver-containing products)".

The classification, recycling, and trade of biological materials (see Chapter 1, Chapter 1 of the 2010 edition);

b) The categories and sources of raw materials have been changed, transforming the two major categories of solid and liquid into five categories (see Chapter 4, 2010 edition, page 3). chapter);

d) A requirement has been added that different categories of recycled silver raw materials should not be mixed together (see 5.2);

e) Increased limits and test methods for radioactive contaminants in recovered silver raw materials (see 5.3 and 6.2);

f) The requirement for "degreasing, cleaning, and carbon removal" of "silver-containing waste catalysts" has been removed (see section 4.2 of the 2010 edition);

g) The requirement for "supplier inspection" for "waste containing flammable, explosive, or other hazardous chemicals" has been removed (see 4.3 in the 2010 version);

h) The inspection methods and test items for appearance quality have been added (see 6.1 and 7.3);

i) Added testing standards for different categories of recycled silver raw materials (see 6.3);

j) The sampling requirements have been changed from "to be agreed upon by the supplier and the buyer" to "different standards shall be applied to different categories of recycled silver raw materials". (See 7.4, 6.4 in the 2010 edition);

k) Changes were made to the markings, packaging, transport and storage, and accompanying documentation (see Chapter 8, Chapter 7 of the 2010 edition);

l) The purchase order details have been changed (see Chapter 9, Chapter 8 in the 2010 edition).

1 Scope

This document specifies the categories and sources, requirements, test methods, inspection rules, marking, packaging, transportation, storage, and accompanying procedures for recycled silver raw materials. Documents and order details.

This document applies to silver and silver alloy raw materials that are initially classified and recycled in the precious metals industry.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.

For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies to this document.

GB/T 5314 Powders for Powder Metallurgy - Sampling Method

GB/T 6680 General Rules for Sampling of Liquid Chemical Products

GB/T 8170 Rules for rounding off numerical values and the representation and determination of limiting values

GB/T 11067.1 Determination of Silver Content by Chemical Analysis of Silver - Silver Chloride Precipitation-Flame Atomic Absorption Spectrometry

GB/T 15072.2 Chemical Analysis Methods for Noble Metal Alloys - Part 2: Determination of Silver Content

GB/T 17832 Determination of Silver Content in Silver Alloy Jewelry - Potassium Bromide Titration Method (Potential Titration)

GB/T 18307 Chemical Analysis Methods for Crude Silver

GB/T 18996 Determination of Silver Content in Silver Alloy Jewelry - Sodium Chloride or Potassium Chloride Titration Method (Potential Titration)

GB/T 24793 Determination of Silver Content in Photographic Processing Waste Liquid

GB/T 38162 Determination of Silver Content in High-Silver Alloy Jewelry - ICP Subtraction Method

GB/T 43569 Jewelry and Precious Metals - Sampling of Precious Metals and Their Alloys

GB/T 43753.1 Chemical Analysis Methods for Wastewater from Electroplating of Precious Metal Alloys - Part 1: Determination of Gold, Silver, Platinum, Palladium and Iridium Content Inductively coupled plasma atomic emission spectrometry

GB/T 43788 Determination of Silver Content in Silver Paste for Solar Cells - Thiocyanate Standard Solution Titration Method

HG/T 4243 Determination of Silver Content in Medical Dry Silver Films

SN/T 0570 Inspection Procedure for Radioactive Contamination of Imported Recycled Raw Materials

YS/T 372.1 Determination of Silver Content in Precious Metal Alloys - Potassium Iodide Potentiometric Titration

YS/T 445.1 Chemical Analysis Methods for Silver Concentrates - Part 1: Determination of Gold and Silver Contents - Fire Assay

YS/T 1328 Sampling and Sample Preparation Methods for Precious Metal Concentrates

3 Terms and Definitions

This document does not contain any terms or definitions that need to be defined.

4 Raw material categories and sources