GB/T 2881-2023 PDF English
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Silicon metal
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Technical requirements for silicon metal
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GB/T 2881-2023: PDF in English (GBT 2881-2023) GB/T 2881-2023
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.150.99
CCS H 61
Replacing GB/T 2881-2014
Silicon metal
工业硅
ISSUED ON. DECEMBER 28, 2023
IMPLEMENTED ON. JULY 01, 2024
Issued by. State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword... 3
1 Scope... 5
2 Normative references... 5
3 Terms and definitions... 5
4 Classification... 5
5 Technical requirements... 5
6 Test methods... 7
7 Inspection rules... 7
8 Marking, packaging, transportation, storage, quality certificate... 9
9 Order form (or contract) contents... 10
Appendix A (Informative) Method for indicating the four-digit designation of silicon
metal... 12
Appendix B ((Informative) Other silicon metal designations and chemical compositions
... 13
Appendix C (Informative) Sampling and sample preparation methods in the production
process... 14
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).
Please note that some of the contents of this document may involve patents. The issuing
organization of this document is not responsible for identifying patents.
This document was proposed by the China Nonferrous Metals Industry Association.
This document shall be under the jurisdiction of National Technical Committee 243 on
Nonferrous Metals of Standardization Administration of China (SAC/TC 243).
Drafting organizations of this document. Hoshine Silicon Industry Co., Ltd., Yunnan
Yongchang Silicon Industry Co., Ltd., Kunming Metallurgical Research Institute Co.,
Ltd., Changji Jisheng New Building Materials Co., Ltd., Zhejiang Xin'an Chemical
Group Co., Ltd., Dujiangyan Tianxing Silicone Industry Co., Ltd., Ningxia
Ronghuayuan Metallurgy Co., Ltd., China Nonferrous Metals Techno-Economic
Research Institute, Chongqing Guochuang Light Alloy Research Institute Co., Ltd.,
Kunming University of Science and Technology.
Main drafters of this document. Luo Weiqi, Wen Jianhua, Cong Dongzhu, Luo Liguo,
Liu Yingbo, Wang Jingrong, Li Zhigang, Lu Guohong, Yang Guiming, Zhu Erming,
Zheng Xiaoning, Jiang Liting, Liao Liang, Wang Xiurong, Gao Jun, Ma Wenhui.
Silicon metal
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
5.1 Chemical composition
5.1.1 Main impurity elements
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.
7.2 Batching
Silicon metal shall be submitted for inspection in batches. Each batch shall consist of
products of the same designation and the batch weight shall not exceed 60 t.
7.3 Weight
Silicon metal shall be weighed on the scales.
7.4 Inspection items
Each batch of products shall be inspected for main impurity element content, particle
size and appearance quality. When required by the order (or contract), special items
such as trace element content shall also be inspected.
7.5 Chemical composition sampling and sample preparation
7.5.1 Arbitration sampling and sample preparation
7.5.1.1 Sampling volume
Samples shall be taken from each batch of products by heat, with no less than one
package from each heat; a small sample of no less than 0.3% by weight shall be taken
from each package.
7.5.1.2 Sampling method
Use a sampling shovel that meets the requirements of Figure 1 to take samples from the
top, middle and bottom of the package. Crush the sample to a particle size of no more
than 5 mm and then use a divider to reduce it, so that the sample after reduction is no
less than 3 000 g. Then crush it to no more than 1 mm and use a divider to reduce it to
400 g as the analysis sample. Use a magnet to remove the iron powder from the analysis
sample and use a tungsten carbide grinding box to prepare the sample. After the sample
is prepared, all the samples shall pass through a 0.149 mm standard sieve. Then divide
the sample into three parts, one for the supplier, one for the demander, and one for the
arbitration.
Dimensions in millimeters
c) designation;
d) number of this document;
e) batch number;
f) net weight.
8.2 Packaging, transportation, storage
Silicon metal packaging shall be moisture-proof and is generally packaged in plastic
woven bags, with a net weight of 1 000 kg per piece. If other forms of packaging are
required, the supply and demand parties can negotiate and confirm and specify them in
the order form (contract). The product shall be protected from rain or moisture during
transportation and storage.
8.3 Quality certificate
Each batch of products shall be accompanied by a product quality certificate, which
shall state.
a) product name;
b) supplier’s information;
c) designation;
d) batch number;
e) weight and number of pieces;
f) analytical inspection results and stamp of the supplier’s technical (quality)
inspection department;
g) number of this document;
h) date of manufacture or packaging.
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;
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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