GB/T 3519-2023Cryptocrystalline graphite (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 3519-2008 "Microcrystalline Graphite". Compared with GB/T 3519-2008, except for structural adjustments and editorial changes In addition, the main technical changes are as follows:

a) Changed the "scope" (see Chapter 1, Chapter 1 of the:2008 edition);

b) Added normative reference documents GB/T 19077 (see 6.3), GB/T 6682 (see 6.4.2.1), GB/T 8170 (see 6.4.6),

JC/T 2571 (see 6.5), GB/T 6679 (see 7.3.1);

c) Changed the definition of the term "microcrystalline graphite" and added the term and definition of "graphitization degree" (see Chapter 3, Chapter 3 of the:2008 edition chapter);

d) Changed "Classification and Labeling" (see Chapter 4, Chapter 4 of the:2008 edition);

e) Changed the "Requirements" (see Chapter 5, Chapter 5 of the:2008 edition);

f) Changed the "test method" (see Chapter 6, Chapter 6 of the:2008 edition);

g) The "inspection rules" have been changed (see Chapter 7, Chapter 7 of the:2008 edition);

h) "Packaging, marking, transportation and storage" has been changed (see Chapter 8, Chapter 8 of the:2008 edition).

1 Scope

This document specifies the classification and labeling, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of microcrystalline graphite.

This document applies to natural microcrystalline graphite raw ore and microcrystalline graphite 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 3520 Graphite fineness test method

GB/T 3521 Chemical analysis methods for graphite

GB/T 6679 General principles for sampling of solid chemical products

GB/T 6682 Specifications and test methods for water used in analytical laboratories

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

GB/T 19077 Laser diffraction method for particle size analysis

JC/T 2571 Determination of trace elements in high-purity graphite

3 Terms and definitions

The following terms and definitions apply to this document.

4 Classification and labeling