GB/T 2272-2020 English PDF (GBT2272-2020)

This Standard specifies the notations for designation, technical requirements, test methods, inspection rules, judgment and re-inspection, packaging, storage and transportation, marking and quality certificates of ferrosilicon. This Standard is applicable ferrosilicon serving as deoxidizer and alloying agent in the iron and steel industry; ferrosilicon serving as inoculant and nodulizer in the foundry industry; and ferrosilicon serving as reducing agent in the magnesium industry and ferroalloy industry.

GB/T 2272-2020
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.100
H 42
Replacing GB/T 2272-2009
Ferrosilicon
(ISO 5445:1980, Ferrosilicon - Specification and Conditions of Delivery, MOD) ISSUED ON: JUNE 02, 2020
IMPLEMENTED ON: SEPTEMBER 01, 2020
Issued by: State Administration for Market Regulation;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative References ... 5
3 Notations for Designation ... 6
4 Technical Requirements ... 7
5 Test Methods ... 10
6 Inspection Rules ... 11
7 Judgment and Reinspection ... 11
8 Packaging, Storage and Transportation, Marking and Quality Certificate ... 11 Appendix A (Informative) Structural Changes of This Standard Compared with ISO 5445:1980 ... 13
Appendix B (Informative) The Technical Differences and Their Causes between this Standard and ISO 5445:1980 ... 14
Foreword
This Standard was drafted as per the rules specified in GB/T 1.1-2009.
This Standard replaced GB/T 2272-2009 Ferrosilicon. Compared with GB/T 2272-2009, this Standard has the major technical changes as follows:
--- Add GB/T 4333.5 and YB/T 4462 to the Normative References (see Clause 2 of this Edition; Clause 2 of 2009 Edition);
--- The existing classification of ferrosilicon is divided into high-silicon ferrosilicon (GG), ordinary ferrosilicon (PG), low-aluminum ferrosilicon (DL) and high-purity ferrosilicon (GC) according to silicon content and main impurity elements. (see Clause 3 of this Edition; 3.1 of 2009 edition);
--- Adjust the designations of ferrosilicon from 21 designations to 40 designations (see 4.1.1 of this Edition; 4.1.1 of 2009 edition);
--- Adjust the chemical composition of some ferrosilicon designations (see 4.1.2 of this Edition; 4.1.2 of 2009 edition);
--- Adjust the particle size specifications of ferrosilicon to four types: natural block, processed block, silicon particle and silicon powder (see 4.2.3 of this Edition; 4.2.2 of 2009 edition);
--- Add the determination and re-inspection of ferrosilicon (see Clause 7). This Standard uses re-drafting method to modify and adopt ISO 5445:1980 Ferrosilicon – Specification and Conditions of Delivery.
Compared with ISO5445:1980, the structure of this standard has been adjusted. Appendix A lists the comparison table of the Clause No. between this Standard and ISO5445:1980.
Compared with ISO5445:1980, this Standard made technical differences. The terms and clauses of these differences have been marked by a vertical single line (︱) on the outer margin of this Standard. Appendix B lists the corresponding technical differences and their causes.
This Standard was proposed by China Iron and Steel Industry Association. This Standard shall be under the jurisdiction of National Technical Committee for Standardization of Pig-Irons and Ferroalloys (SAC/TC 318).
Drafting organizations of this Standard: Erdos Xijing Kuangye Co., Ltd.; Inner Mongolia Erdos Electric Power & Metallurgy Co., Ltd.; Tianjin Tiangang United Special Steel Co., Ferrosilicon
1 Scope
This Standard specifies the notations for designation, technical requirements, test methods, inspection rules, judgment and re-inspection, packaging, storage and transportation, marking and quality certificates of ferrosilicon.
This Standard is applicable ferrosilicon serving as deoxidizer and alloying agent in the iron and steel industry; ferrosilicon serving as inoculant and nodulizer in the foundry industry; and ferrosilicon serving as reducing agent in the magnesium industry and ferroalloy industry.
2 Normative References
The following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) are applicable to this document.
GB/T 3650 The General Rules for Inspection, Packing, Storing, Transportation, Marking and Certification of Ferroalloy
GB/T 4010 Ferroalloys - Sampling and Preparation of Samples for Chemical Analysis (GB/T 4010-2015, ISO 4552-1:1987, ISO 4552-2:1987, MOD)
GB/T 4333.1 Ferrosilicon - Determination of Silicon Content - Perchloric Acid Dehydration Gravimetric Method and Potassium Fluosilicate Volumetric Method GB/T 4333.2 Methods for Chemical Analysis of Ferrosilicon - The Reduced Molybdobismuthyl phosphoric Acid Photometric Method for the Determination of Phosphorus Content
GB/T 4333.3 Methods for Chemical Analysis of Ferrosilicon - The Potassium Periodate Photometric Method for the Determination of Manganese Content GB/T 4333.4 Ferrosilicon - Determination of Aluminum Content - The Chrome azurol S Spectrophotometric Method - The EDTA Titrimetric Method and the Flame Atomic Absorption Spectrometric Method
GB/T 4333.5 Ferrosilicon - Determination of Silicon, Manganese, Aluminum, Calcium, Chromium and Iron Contents - Wavelength Dispersive X-Ray
Fluorescence Spectrometry (Fused Cast Bead Method)
GB/T 4333.6 Ferrosilicon – Determination of Chromium Content -
Diphenylcarbazide Spectrophotometric Method
GB/T 4333.7 Ferrosilicon - Determination of Sulfur Content - Infrared Absorption Method and Chromatographic Separation-Barium Sulfate Gravimetric Method GB/T 4333.8 Methods for Chemical Analysis of Ferrosilicon - The Atomic
Absorption Spectrometric Method for the Determination of Calcium Content GB/T 4333.10 Ferrosilicon - Determination of Carbon Content - Infrared
Absorption Method
GB/T 7738 Notations for Designation of Ferroalloys
GB/T 13247 Methods for Sampling and Testing the Grain Size of Ferroalloys Products (GB/T 13247-2019, ISO 4551:1987, MOD)
GB/T 24194 Ferrosilicon - Determination of Aluminum Calcium Manganese
Chromium Titanium Copper Phosphorus and Nickel Content - Inductively Coupled Plasma Atomic Emission Spectrometric Method
YB/T 4462 High Purity Ferrosilicon - Determination of Boron Content - Inductively Coupled Plasma Atomic Emission Spectrometric Method
3 Notations for Designation
Ferrosilicon designations are implemented in accordance with the provisions of GB/T 7738; and are divided into four categories, such as high-silicon ferrosilicon (GG), ordinary ferrosilicon (PG), low-aluminum ferrosilicon (DL) and high-purity ferrosilicon (GC) based on the silicon content and main impurity elements of ferrosilicon. The meanings of the symbols and numbers of each part of the ferrosilicon designations are as follows
6 Inspection Rules
6.1 Batching
Ferrosilicon is batched according to the same designation, but the fluctuation range of silicon content shall not exceed 3%.
6.2 Sampling and sample preparation
The method of sampling and sample preparation of ferrosilicon shall be as specified in GB/T 4010.
6.3 Quality inspection and acceptance
The quality inspection and acceptance of ferrosilicon shall be as specified in GB/T 3650.
6.4 Sampling and acceptance of particle size
The sampling method and acceptance of the particle size of ferrosilicon shall be as specified in GB/T 13247.
7 Judgment and Reinspection
7.1 The inspection result shall be judged according to the technical requirements. 7.2 When the purchaser has any objection to the quality of the product, it shall be raised within 20 working days from the date of receipt; and the supplier and the buyer (or entrusted to a third party) shall jointly re-sampling and re-inspect, and determine according to the re-inspection result.
7.3 If arbitration is required, relevant matters shall be negotiated by the supplier and the purchaser.
8 Packaging, Storage and Transportation, Marking and
Quality Certificate
8.1 Packaging
According to the demand of the purchaser, ferrosilicon may be supplied in bulk, container, bag, etc. When supplying in bags or containers, there shall be obvious signs on the outside of the packaging.