GB/T 38471-2023 PDF English (GB/T 38471-2019: Older version)
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Recycling material for copper
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GB/T 38471-2023: PDF in English (GBT 38471-2023) GB/T 38471-2023
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.150.30
CCS H 62
Replacing GB/T 38471-2019
Recycling material for copper
ISSUED ON. MAY 23, 2023
IMPLEMENTED ON. DECEMBER 01, 2023
Issued by. State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword... 3
1 Scope... 6
2 Normative references... 6
3 Terms and definitions... 7
4 Classification... 10
5 Technical requirements... 12
6 Test methods... 14
7 Inspection rules... 16
8 Factory inspection... 18
9 Transportation, storage and accompanying documents... 18
Appendix A (Informative) Typical photos of recycling materials for copper... 20
Appendix B (Normative) Detection methods for volatile substances... 24
Appendix C (Normative) Factory inspection... 26
Appendix D (Normative) Preparation of copper content samples and test method of
metal recovery rate... 28
Bibliography... 30
Recycling material for copper
1 Scope
This document specifies the classification, technical requirements, test methods,
inspection rules, factory inspection, transportation, storage and accompanying
documents of recycling materials for copper (hereinafter referred to as “raw materials”).
This document applies to recycling materials for copper.
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 5085.1, Identification standards for hazardous wastes - Identification for
corrosivity
GB 5085.2, Identification standards for hazardous wastes - Screening test for acute
toxicity
GB 5085.3, Identification standards for hazardous wastes - Identification for
extraction toxicity
GB 5085.4, Identification standards for hazardous wastes - Identification for
ignitability
GB 5085.5, Identification standards for hazardous wastes - Identification for
reactivity
GB 5085.6, Identification standards for hazardous wastes - Identification for toxic
substance content
GB/T 5121.1, Methods for chemical analysis of copper and copper alloys - Part 1.
Determination of copper content
GB/T 8170, Rules of rounding off for numerical values & expression and judgment
of limiting values
SN/T 0570-2022, Rules for the inspection of radioactive contamination of imported
recycling materials
7.4.2 If any of the inspection results for appearance quality, radioactive contamination,
hazardous wastes, or other requirements do not meet the requirements, judge the batch
of raw materials not to meet the requirements of this document.
7.4.3 If any of the inspection results for foreign substances and coatings, other volatile
substances, and physical quantity of copper are unqualified, double the number of
representative samples shall be taken from the batch of raw materials and repeated tests
shall be conducted on the unqualified items. If all the repeated test results are qualified,
judge the batch of raw materials to be qualified, otherwise, judge that the batch of raw
materials does not meet the requirements of this document.
8 Factory inspection
The purchaser shall conduct factory inspection of raw materials in accordance with
Appendix C.
9 Transportation, storage and accompanying documents
9.1 Transportation and storage
9.1.1 During transportation, bulk raw materials of different categories and names shall
not be mixed.
9.1.2 In order to make full use of shipping space, when raw materials of different
categories and names are packaged independently, two or more raw materials of
different names may be mixed in one vehicle, ship or container, but they shall be placed
according to categories and clearly marked.
9.1.3 The transportation and storage of raw materials shall be protected from rain and
snow.
9.2 Accompanying documents
Each batch of raw materials shall be accompanied by accompanying documents, which
shall indicate.
a) name of the supplier;
b) raw material category, name or code;
c) gross weight and net weight;
d) foreign substances and coatings;
e) other volatile substances;
f) physical quantity of copper;
Appendix B
(Normative)
Detection methods for volatile substances
Warning – This method has the risk of high temperature scalds and burns.
Operators shall wear high temperature resistant gloves, protective masks and
protective clothing. The laboratory shall have good ventilation measures.
B.1 Method summary
Heat the sample to a fixed temperature and keep it at this temperature until constant
weight is reached; measure the mass loss to calculate the volatile substance.
B.2 Instruments and apparatuses
B.2.1 Drying oven. The operating temperature can reach 500 ℃, with an accuracy of
±5 ℃.
B.2.2 Sample plate.
B.2.3 Electronic scale. The accuracy is 0.01 g.
B.2.4 Desiccator.
B.3 Sampling
In each inspection batch, take 2 representative raw material samples, each weighing not
less than 1.0 kg. The sample can be divided into several independent test samples.
B.4 Test procedure
B.4.1 After the sample pan has reached constant weight at 105 °C, place it in a drying
oven and cool it to room temperature. Weigh the mass and record it as m0.
B.4.2 Place the sample in a sample pan and flatten it; weigh the mass of the sample pan
containing the sample and record it as m5.
B.4.3 Place the sample pan containing the representative sample in a drying oven; raise
the temperature to 105 °C; keep it warm for 1 hour.
B.4.4 Take out the sample pan containing the representative sample from the drying
oven and place it in a desiccator. After cooling to room temperature, weigh the mass of
the sample pan containing the representative sample and record it.
B.4.5 Repeat B.4.3 and B.4.4.Record the mass of the sample pan containing the
representative sample weighed for the last time as m6.
B.4.6 Place the sample pan containing the representative sample from the last weighing
in B.4.5 into a drying oven; heat it to 350 °C; keep it warm for 35 minutes.
B.4.7 Take out the sample pan containing the representative sample from the drying
oven and place it in a desiccator. After cooling to room temperature, weigh the mass of
the sample pan containing the representative sample and record it.
B.4.8 Repeat B.4.6 and B.4.7 until the difference between the two weighing results is
no more than 0.05 g. Otherwise, repeat B.4.6 and B.4.7, and record the mass of the
sample pan containing the representative sample in the last weighing as m7.
B.5 Test data processing
Calculate other volatile substances (wV) of the sample according to Formula (B.1), and
express the value in %.
Where.
m6 – mass of the representative sample and the sample pan weighed for the last time in
step B.4.5, in grams (g);
m7 – mass of the representative sample and the sample pan weighed for the last time in
step B.4.8, in grams (g);
m5 – mass of the initial sample and the sample pan in step B.4.2, in grams (g);
m0 – mass of the sample pan in step B.4.1, in grams (g).
The final result of other volatile substance content of raw materials is the average of the
test results of 2 representative samples.
C.3 Inspection methods
C.3.1 Metal recovery rate
The metal recovery rate of raw materials shall be tested in accordance with the
provisions of Appendix D.
C.3.2 Copper content
The copper content of the raw materials shall be determined as follows.
a) When on-site inspection is required, a portable rapid spectrometer may be used
to conduct a preliminary inspection of the chemical composition of the raw
materials; when verification is required, a copper content sample shall be
prepared according to Appendix D and tested in accordance with the provisions
of GB/T 5121.1 or YS/T 483.
b) When arbitration is required, it shall be conducted in accordance with the
provisions of GB/T 5121.1.
C.4 Determination of inspection results
If any inspection result of copper content and metal recovery rate is unqualified, double
the number of representative samples shall be taken from the batch of raw materials and
repeated tests shall be conducted on the unqualified item. If all the repeated test results
are qualified, judge the batch of raw materials to be qualified; otherwise, judge that the
batch of raw materials does not meet the requirements of this document.
Appendix D
(Normative)
Preparation of copper content samples and test method of metal recovery rate
Warning – This method has the risk of high temperature scalds and burns.
Operators shall wear high temperature resistant gloves, protective masks and
protective clothing. The laboratory shall have good ventilation measures.
D.1 Method summary
Take the raw material sample; after pretreatment, place it in a melting furnace; fully
melt; remove slags; prepare it into a copper content sample. After the remaining fuse-
element solidifies, the ratio of the mass of the obtained ingot to the mass of the sample
is the metal recovery rate.
D.2 Reagents or materials
Smelting covering agents and slag cleaning agents (such as charcoal, salt, borax, etc.).
D.3 Instruments and apparatuses
D.3.1 Melting furnace.
D.3.2 Crucible. preferably a graphite crucible.
D.3.3 Mold.
D.3.4 Electronic scale. The accuracy is 0.01kg.
D.4 Test procedure
D.4.1 Sampling
From each inspection batch, take a representative sample with a mass of not less than
10 kg.
D.4.2 Weighing
Weigh and record the sample mass m8.
D.4.3 Pre-treatment
Pick out foreign substances and non-copper metals mixed into the representative sample
as much as possible.
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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