GB/T 2881-2023Silicon metal (English PDF)

Foreword

This document was drafted in accordance with the rules given in GB/T 1.1-2020, Directives for standardization - Part 1: Rules for the structure and drafting of standardizing documents.

This document replaces GB/T 2881-2014 Silicon metal. Compared with GB/T 2881-2014, in addition to structural adjustments and editorial changes, the main technical changes are as follows.

a) Change the requirements for nominal silicon content (see 5.1.1; 3.2.1 of the 2014 edition);

b) Delete the product category of silicon metal for polysilicon, change the index requirements for carbon content, and add the index requirements for other individual elements; delete the product category of silicon metal for organosilicon, add the index requirements for manganese, chromium, lead, vanadium and other individual elements, and change the index requirements for titanium content (see 5.1.2; 3.2.2 of the 2014 edition);

c) Change the chemical composition arbitration sampling volume (see 7.5.1.1; 5.5.1.1 of the 2014 edition);

d) Change the determination of chemical composition test results (see 7.8.1; 5.8.1 of the 2014 edition).

1 Scope

This document specifies the classification, technical requirements, test methods, inspection rules, marking, packaging, transportation, storage, quality certificate and order (or contract) contents of silicon metal.

This document applies to silicon metal produced by smelting carbonaceous reducing agents and silica in a submerged arc furnace, which is mainly used for preparing alloys, producing polysilicon and producing organic silicon.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the version corresponding to that date is applicable to this document; for undated references, the latest version (including all amendments) is applicable to this document.

GB/T 8170, Rules of rounding off for numerical values & expression and judgment of limiting values

GB/T 14849 (all parts), Methods for chemical analysis of silicon metal

3 Terms and definitions

No terms and definitions need to be defined in this document.

4 Classification

Silicon metal is classified according to its chemical composition. The designation is expressed in the form of a combination of the silicon element symbol and a 4-digit number (or letter). The expression method is shown in Appendix A.

5 Technical requirements

7 Inspection rules

7.1.2 The demander shall inspect the received products in accordance with the provisions of this document. If the inspection results are inconsistent with the provisions of this document and the purchase order (or contract), the demander shall submit a written report to the supplier for negotiation. Any objection to particle size, appearance, or chemical composition shall be raised within 30 days from the date of receipt of the product. If arbitration is required, the supply and demand parties shall jointly conduct arbitration sampling.

8 Marking, packaging, transportation, storage, quality certificate

c) designation;

d) number of this document;

e) batch number;

f) net weight.

9 Order form (or contract) contents

An order form (or contract) for the products listed in this document may include the following.

a) product name;

b) designation;

c) weight; […]