GB/T 23522-2023Germanium renewable raw materials (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" Drafting.

This document replaces GB/T 23522-2009 "Recycled Germanium Raw Materials" and GB/T 23523-2009 "Method for Determination of Germanium in Recycled Germanium Raw Materials". This document is based on GB/T 23522-2009 and integrates the contents of GB/T 23523-2009.

Compared with GB/T 23522-2009, in addition to structural adjustments and editorial changes, the main technical changes are as follows:

a) Changed the scope (see Chapter 1, Chapter 1 of the 2009 edition);

b) Added a "Terms and Definitions" chapter (see Chapter 3);

c) Changed the expression of classification and added classification and main sources (see Chapter 4, 3.1 of the 2009 edition);

d) Delete the requirements and determination of chromium content in primary solid recycled germanium raw materials (see 3.1.1 and 4.5 of the 2009 edition);

e) Delete the requirements for the grade of raw solid recycled germanium raw materials (see 3.1.1 of the 2009 edition);

f) Delete the requirements for radioactive substances in recycled germanium raw materials (see 3.5 of the 2009 edition);

g) The expressions of appearance quality and particle size have been changed, and the test methods for particle size and appearance quality have been added (see 5.1.2, 5.1.3, 6.6, 6.7, 2009 version 3.2, 3.3, 3.4);

h) The expression of moisture in the chemical composition of raw solid recycled germanium raw materials is deleted, and the elements are specified separately (see 5.1.4 and 5.2.4, Table 1 of the 2009 edition);

i) Added technical requirements for combined regenerated germanium raw materials (see 5.2);

j) Added test methods for fluorine and sulfur (see 6.4 and 6.5);

k) The moisture test method has been changed (see 6.8, 4.1 of the 2009 edition);

l) Changed the requirements for the purchaser to accept the received products (see 7.1.2, 5.1.2 of the 2009 version);

m) Changed the time for the purchaser to report to the supplier when the inspection results after receiving the product are inconsistent with the standards (see 7.1.2, 2009 version 5.1.2);

n) Changed the subdivision regulations for batches (see 7.2, 5.2 of the 2009 version);

o) Added the requirement that special grade products with a germanium content greater than 99% may not be tested (see 7.3);

p) The contents of sampling and sample preparation have been changed (see 7.4, 5.4 of the 2009 edition);

q) The judgment of inspection results has been changed (see 7.5, 5.5 of the 2009 version);

r) The batch weight requirements for measurement deviations have been changed, and the requirements for marking, packaging, etc. have been adjusted (see Chapter 8, Chapter 6 of the 2019 edition);

s) Added Appendix A (Normative) Potassium iodate titration method for determination of germanium content in recycled germanium raw materials.

1 Scope

This document specifies the classification, technical requirements, test methods, inspection rules, marking, packaging, transportation, storage, and accompanying documents of recycled germanium raw materials and order form contents, etc.

This document applies to recyclable recycled germanium raw materials generated from the production, processing and use of germanium.

Note: Regenerated germanium raw materials are mainly used as raw materials for the production of high-purity germanium tetrachloride, high-purity germanium dioxide, zone melted germanium ingots, germanium single crystals and other products.

2 Normative reference documents

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document.

GB/T 1480 Metal powder dry screening method for particle size determination

GB/T 8170 Numerical rounding rules and expression and determination of limit values

GB/T 23513.2 Methods for chemical analysis of germanium concentrates Part 2: Determination of arsenic content Ferrous ammonium sulfate titration method

GB/T 23513.3 Methods for chemical analysis of germanium concentrates Part 3: Determination of sulfur content Barium sulfate gravimetric method

GB/T 23513.4 Methods for chemical analysis of germanium concentrates Part 4: Determination of fluorine content ion selective electrode method

GB/T 23513.5 Methods for chemical analysis of germanium concentrates Part 5: Gravimetric method for determination of silica content

3 Terms and definitions

The following terms and definitions apply to this document.

4 Categories

Regenerated germanium raw materials can be divided into two categories according to their sources: metallic recycled germanium raw materials and compound recycled germanium raw materials. The main sources are shown in Table 1.