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GB/T 13587-2020 English PDF (GBT13587-2020)

GB/T 13587-2020 English PDF (GBT13587-2020)

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GB/T 13587-2020: Scraps of copper and copper alloy

This standard specifies the classification, technical requirements, test methods, inspection rules, markings, packaging, transportation, storage, and purchase order (or contract) content of scraps of copper and copper alloy. This standard applies to scraps of copper and copper alloy.
GB/T 13587-2020
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 77.150.30
H 62
Replacing GB/T 13587-2006
Scraps of copper and copper alloy
ISSUED ON: SEPTEMBER 29, 2020
IMPLEMENTED ON: AUGUST 01, 2021
Issued by: State Administration for Market Regulation;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Terms and definitions ... 5
4 Categories... 7
5 Technical requirements ... 8
6 Test method ... 11
7 Inspection rules ... 12
8 Marking, packaging, transportation and storage ... 14
9 Purchase order (or contract) content ... 14
Appendix A (Informative) Inspection method of radioactive contamination ... 15 Appendix B (Normative) Preparation of chemical composition specimen and testing method of metal recovery rate ... 21
Appendix C (Informative) Copper scrap inspection process ... 23
References ... 24
Scraps of copper and copper alloy
1 Scope
This standard specifies the classification, technical requirements, test methods, inspection rules, markings, packaging, transportation, storage, and purchase order (or contract) content of scraps of copper and copper alloy (hereinafter referred to as copper scrap).
This standard applies to scraps of copper and copper alloy.
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 (all parts) Methods for chemical analysis of copper and copper alloys
GB/T 8170 Rules of rounding off for numerical values and expression and
judgement of limiting values
GB/T 27683 Specifications for recovery of cutting filings of free-cutting copper alloys
YS/T 482 Method for analysis of copper and copper alloys - The atomic
emission spectrometry
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
Scraps of copper and copper alloy
Materials that contain copper and copper alloy components that are
produced during the production process, or lose their original purpose or use function during consumption and use, which can be recycled and reused by smelting enterprises or processing and manufacturing enterprises.
3.2
Foreign material
Non-metallic substances mixed into copper scrap during production,
collection, packaging and transportation.
Note: Including waste wood, waste paper, waste plastics, waste rubber, waste glass, rocks, powders (dust, sludge, crystalline salt, metal oxides, fiber powder, etc.) which have a particle size of not greater than 2 mm, etc., excluding packaging and other substances used during transportation.
3.3
Non-copper metal
Metal substances other than copper and copper alloys mixed into copper
scrap during production, collection, packaging and transportation.
Note: Generally, it includes free iron, aluminum and aluminum alloy, zinc and zinc alloy, etc.
3.4
Plating material
The material plated on the surface of copper scrap.
Note: Generally, it includes nickel, tin, zinc, aluminum, chromium, etc. 3.5
Moisture
In the process of production, collection, packaging, storage and
transportation, the water and emulsion attached to the copper scraps.
3.6
Representative sample
A certain amount of physical objects that are extracted from the entire batch of copper scraps and can fully represent the attributes of copper scraps. 3.7
before inspection, then inspected by sensory organs.
6.2 Radioactive contaminants
The radioactive contaminants of copper scrap can be inspected with reference to Appendix A.
6.3 Hazardous substances
Hazardous substances in copper scrap are inspected by the sensory organs. 6.4 Chemical composition
The chemical composition analysis method is carried out in accordance with the requirements of GB/T 5121 (all parts), YS/T 482 or YS/T 483. The arbitration inspection shall be conducted in accordance with the provisions of GB/T 5121 (all parts).
6.5 Metal recovery rate
The metal recovery rate of copper scrap is estimated using senses. When there is disagreement between the supplier and the buyer, the inspection shall be carried out in accordance with the provisions of Appendix B.
7 Inspection rules
7.1 Inspection process
The copper scrap specified in this standard can be inspected with reference to the process of Appendix C.
7.2 Inspection and acceptance
The purchaser shall inspect the copper scrap received according to this standard. If the inspection result does not conform to the provisions of this standard and the purchase order (or contract), it shall be submitted to the supplier in written form and the two parties shall negotiate and resolve. If arbitration is required, a third party recognized by the supplier and the buyer can be entrusted to conduct it.
7.3 Group-batching
Copper scraps shall be submitted for inspection in batches. Each batch shall be composed of copper scraps of the same category, name and grade; the
batch weight shall not exceed 50 t.
7.4 Inspection items
Appendix A
(Informative)
Inspection method of radioactive contamination
A.1 Inspection instrument
The inspection instrument shall meet the requirements of GB 18871, GB/T 12162.3, GB/T 5202.
A.2 Measurement of external radiation penetration radiation dose rate
A.2.1 Measurement of natural environmental radiation background
A.2.1.1 Before measuring the external radiation penetration radiation dose rate, it shall first measure and determine the local natural environmental radiation background value.
A.2.1.2 Select 3 ~ 5 points (can be used as fixed survey points) on a flat open ground without radioactive contamination that can represent the local normal natural radiation background state as the measurement points.
A.2.1.3 Place the measuring probe of the measuring instrument at a height of 1 m above the measuring point to measure the penetration radiation dose rate of the external radiation. Read the measured value once every 10 s. Take the average of the 10 readings as the measured value of this point. Take the arithmetic average of the measured values of each measuring point as the average value of normal natural radiation.
A.2.2 Tour inspection
A.2.2.1 The copper scrap shall be tour-inspected for radioactive contamination. During the tour inspection, the measuring instrument shall be as close as possible to the surface of the measured object or the surface of the container, car body, warehouse, etc., to perform the tour inspection of the surface of the object to be measured.
A.2.2.2 When it is found that the radioactivity has obviously exceeded the management limit of 3 test indicators during the tour inspection, it is judged as unqualified. When radioactive contamination has been found to exceed the management limit of 3 detection indicators, no sub-inspection or selection will be carried out.
A.2.3 Distribution of test points
K1 - The scale factor of the measuring instrument (given by the instrument's calibration certificate);
K?? - The efficiency factor of the measuring instrument;
- The reading of the measured value of the measuring instrument, in
microGy per hour (??Gy/h).
A.3 Inspection of ??, ?? surface contamination
A.3.1 Testing requirements
Generally, the tour inspection and point arrangement measurement of the surface contamination level of ?? and ?? shall be carried out at the same time as the measurement of the external radiation penetration radiation dose rate. If necessary, the tour inspection and point arrangement measurement of the item can also be carried out separately.
A.3.2 Test point layout
For the detection of ?? and ?? surface contamination levels, the test points shall be arranged according to the provisions of A.2.3; the measurement area shall be greater than 300 cm2.
A.3.3 Efficiency measurement of ?? surface contamination measuring
instrument
A.3.3.1 Use the ?? surface contamination measuring instrument to measure the count N0,?? of the natural environment radiation background for 10 minutes. A.3.3.2 Determine the instrument calibration source for 5 min, to get count N1, ??.
A.3.3.3 Reverse the probe of the instrument by 180?? and measure it for another 5 minutes, to obtain the count N2,?? of the calibration source (considering the unevenness of the plane source).
A.3.3.4 Calculate the efficiency factor ??4?€(??) of the instrument according to formula (A.3):
Where:
??4?€(??) - The efficiency factor of the instrument;
N1,?? - The Count measured in the previous 5 minutes of the calibration
Appendix B
(Normative)
Preparation of chemical composition specimen and testing method of
metal recovery rate
B.1 Method summary
Take a sample of copper scrap. After pretreatment, put it into the melting furnace, to fully melt it. Remove the slag. Prepare a chemical composition specimen. Wait the melt to be solidified. Prepare an ingot. The ratio of the sum of the weight of the obtained ingot and the weight of the chemical composition specimen to the weight of the sample is the metal recovery rate.
B.2 Reagents or materials
B.2.1 Casting covering agent (such as charcoal, graphite flake).
B.2.2 Flux (such as borax, salt).
B.3 Instruments
B.3.1 Electric melting furnace.
B.3.2 Graphite crucible.
B.3.3 Mould.
B.3.4 Electronic scale (precision 0.1 kg).
B.4 Test procedure
B.4.1 Sampling
In each inspection batch, take a representative sample which has a weight of not less than 10 kg.
B.4.2 Weighing
Weigh and record the sample weight m0.
B.4.3 Pretreatment
Pick out the foreign materials and non-copper metals mixed in the sample as much as possible.
B.4.4 Melting, heat preservation

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