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GB/T 38471-2019 (GBT 38471-2019)

Chinese standards (related to): 'GB/T 38471-2019'
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BASIC DATA
Standard ID GB/T 38471-2019 (GB/T38471-2019)
Description (Translated English) Recycling materials for copper
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard H62
Classification of International Standard 77.150.30
Word Count Estimation 26,281
Date of Issue 2019-12-31
Date of Implementation 2020-07-01
Drafting Organization Ningbo Jintian Copper Industry (Group) Co., Ltd.
Administrative Organization National Nonferrous Metals Standardization Technical Committee
Regulation (derived from) National Standards Bulletin No. 19 of 2019
Proposing organization China Nonferrous Metals Industry Association
Issuing agency(ies) State Administration of Market Supervision and Administration, National Standardization Administration


GB/T 38471-2019: PDF in English (GBT 38471-2019)
GB/T 38471-2019
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.150.30
H 62
Recycling materials for copper
ISSUED ON: DECEMBER 31, 2019
IMPLEMENTED ON: JULY 01, 2020
Issued by: State Administration for Market Regulation;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Terms and definitions ... 4 
4 Classification ... 7 
5 Technical requirements ... 7 
6 Test method ... 10 
7 Inspection rules ... 12 
8 Marking, packaging, transportation, storage and quality certificate ... 14 
9 Purchase order (or contract) content ... 15 
Appendix A (Informative) Typical photos of recycling materials for copper ... 16 
Appendix B (Informative) Radioactive contamination inspection method ... 22 
Appendix C (Normative) Moisture content testing method ... 28 
Appendix D (Normative) Preparation of chemical composition specimen and
testing method of metal recovery ... 30 
Appendix E (Informative) Inspection process for recycling material for copper
... 32 
References ... 33 
Recycling materials for copper
1 Scope
This standard specifies the classification, technical requirements, test methods,
inspection rules, markings, packaging, transportation, storage, quality
certificates and purchase orders (or contracts) of recycling materials for copper
(hereinafter referred to as raw materials).
This standard applies to recycling materials for copper and their recycling and
domestic and foreign trade in the field of circulation.
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) is applicable to this standard.
GB/T 5121.1 Methods for chemical analysis of copper and copper alloys -
Part 1: Determination of copper content
GB/T 6682 Water for analytical laboratory use - Specification and test
methods
GB/T 8170 Rules of rounding off for numerical values & expression and
judgement of limiting values
YS/T 483 Methods for analysis of copper and copper alloys - X-ray
fluorescence spectrometric (wavelength dispersive)
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Recycling materials for copper
The raw materials that meet the requirements of this standard and can be
used directly for production and utilization as obtained by sorting or
pretreating the recovered copper or its mixed metals.
3.2
Representative sample
A certain amount of physical objects that are extracted from the entire batch
of raw materials and can fully represent the attributes of the raw materials.
3.3
Foreign material
Non-metallic substances mixed into raw materials during production,
collection, packaging and transportation.
Note: Foreign materials include waste wood, waste paper, waste plastic,
waste rubber, waste glass, rocks, powders (dust, sludge, crystalline salt,
metal oxide, fiber powder, etc.) which have a particle size of not more than
2 mm, etc., but does not include packaging and other substances used
during transportation.
3.4
Moisture
In the process of production, collection, packaging, storage, transportation,
water and emulsion attached to the raw materials.
3.5
Non-copper metal
Metal substances other than copper and copper alloy mixed into the raw
materials during production, collection, packaging and transportation.
Note: Non-copper metals generally include free iron, aluminum and
aluminum alloys, zinc and zinc alloys, etc.
3.6
Metal copper content
The amount of metal per unit mass of the sample after removal of foreign
materials, moisture and non-copper metals, expressed as a percentage.
Note: For example, if a 100 kg sample is taken, the mass of foreign materials
is 0.5 kg, the mass of moisture is 0.2 kg, the mass of non-copper metals
such as aluminum and iron is 2 kg, the mass of copper and copper alloy is
97.3 kg, then the amount of metallic copper is 97.3%.
3.7
Total metal content
The amount of metal (including copper metal and non-copper metal) after
removal of foreign materials and moisture per unit mass of the sample, as
expressed as a percentage.
Note: For example, if a 100 kg sample is taken, the mass of foreign materials
is 0.5 kg, the mass of moisture is 0.2 kg, the mass of non-copper metals
such as aluminum and iron is 2 kg, the mass of copper and copper alloys is
97.3 kg, then the total amount of metal is 99.3%.
3.8
Coating material
The material applied to the surface of the raw material.
Note: The coating generally includes identification paint, anti-rust paint,
insulating layer, etc.
3.9
Plating material
The material that is plated on the surface of the raw material.
Note: The plating generally includes nickel, tin, zinc, aluminum, chromium,
etc.
3.10
Chemical composition sample
A sample that is directly extracted or melted from the raw material and used
to detect the content of copper and other elements.
3.11
Copper content
The copper element content detected in the chemical composition sample.
3.12
Metal recycling rate
After pretreatment, melting and solidification of a unit mass sample, the ratio
6.5.2 Take raw material samples. Weigh and record the sample mass m. When
necessary, check the moisture content (mass fraction) wH2O according to
Appendix C. Then carefully visually check and select the copper metal and non-
copper metals by hand. If necessary, break the sample and mechanically
separate the copper and non-copper metals embedded in the sample. Weigh
and record the separated copper metal mass m4 and non-copper metal mass
m5. Respectively use the formula (4) and (5) to calculate the amount of metal
copper wC and the total amount of metal wZ; the values are expressed in %.
Where:
m4 - The mass of metallic copper, in kilograms (kg);
m - The mass of the sample, in kilograms (kg);
w H2O - Moisture content (mass fraction);
m5 - The mass of non-copper metal, in kilograms (kg).
6.6 Copper content
The inspection of the copper content of the raw materials is carried out in
accordance with the provisions of GB/T 5121.1 or YS/T 483. The arbitration
shall be conducted in accordance with the provisions of GB/T 5121.1.
6.7 Metal recovery rate
The inspection of metal recovery rate of raw materials shall be carried out in
accordance with Appendix D.
6.8 Other requirements
Other requirements for raw materials are subject to sensory inspection.
7 Inspection rules
7.1 Inspection process
The raw material's inspection process can refer to Appendix E.
7.2 Inspection and acceptance
The purchaser shall inspect the received raw materials in accordance with the
7.6.2 If the inspection results meet the requirements of this standard, the batch
of copper raw materials is determined to be qualified.
7.6.3 When the inspection results of any of the apparent characteristics,
radioactive contaminants, and other requirements do not meet the
requirements, it is determined that the batch of raw materials does not meet the
requirements of this standard.
7.6.4 If any of the test results of foreign materials content, total metal, copper
metal, metal recovery rate, moisture content, copper content is unqualified, it
shall take another double amount of samples to carry out repeated test for this
unqualified item. If the repeated test results are qualified, the batch of raw
materials is judged to be qualified; otherwise, the batch of raw materials does
not meet the requirements of this standard.
8 Marking, packaging, transportation, storage and
quality certificate
8.1 Marking
Each batch of raw materials shall be accompanied by a label indicating:
a) The name of the supplier;
b) Name of raw material;
c) Raw material code;
d) Batch number;
e) Total weight;
f) Net weight;
g) This standard number;
h) Others.
8.2 Packaging
The raw materials can be packaged in bulk, packaged, or pressed. The
packaging method, size and weight shall be negotiated between the supplier
and the buyer.
8.3 Transportation and storage
8.3.1 During transportation, different types of bulk materials shall not be mixed.
8.3.2 The transportation and storage of raw materials shall be protected from
rain and snow.
8.4 Quality certificate
Each batch of raw materials shall be accompanied by a quality certificate, which
shall indicate:
a) The name of the supplier;
b) Name of raw material;
c) Total amount of metal;
d) The amount of metal copper;
e) Inspection stamp by the supplier's quality supervision department;
f) This standard number.
9 Purchase order (or contract) content
The order form (or contract) for the raw materials listed in this standard shall
include the following:......