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GB/T 40382-2021: Recycling materials for wrought aluminium alloys
GB/T 40382-2021
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.120.10
CCS H 61
Recycling materials for wrought aluminium alloys
ISSUED ON: AUGUST 20, 2021
IMPLEMENTED ON: MARCH 01, 2022
Issued by: State Administration for Market Regulation;
Standardization Administration of the People's Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms and definitions ... 4
4 Classification ... 5
5 Requirements ... 6
6 Test methods ... 7
7 Inspection rules ... 9
8 Enter-factory inspection and acceptance ... 10
9 Packaging, transportation, storage and quality certificate ... 10
10 Order (or contract) contents ... 11
Annex A (informative) Typical diagrams of foreign materials ... 13
Annex B (informative) Typical sources and packaging methods of raw materials of the
same designation ... 19
Annex C (informative) Typical sources and packaging methods of raw materials of the
same series ... 25
Annex D (informative) Typical sources and packaging methods of multi-series
designations of raw materials ... 28
Annex E (informative) Chemical composition of raw materials ... 31
Annex F (informative) Vibrating screen ... 34
Annex G (informative) Inspection methods for radioactive contamination ... 36
Annex H (normative) Enter-factory inspection and acceptance ... 42
Annex I (informative) Hydraulic single shaft shredder ... 45
Annex J (normative) Testing methods for volatile substances ... 47
Annex K (normative) Preparation of chemical composition samples and inspection
methods for metal recovery rate ... 49
Annex L (informative) General requirements and test methods for portable
spectrometer equipment ... 52
Bibliography ... 54
Recycling materials for wrought aluminium alloys
1 Scope
This document specifies the classification, requirements, test methods, inspection rules,
enter-factory inspection and acceptance, packaging, transportation, storage, quality
certificate and order (or contract) contents of recycling materials for wrought
aluminium alloys.
This document applies to the wrought aluminium alloy raw materials for melting and
casting (hereinafter referred to as raw materials) obtained after recycled aluminium is
sorted and processed.
2 Normative references
The following referenced documents are indispensable for the application of this
document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
GB/T 7999, Optical emission spectrometric analysis method of aluminium and
aluminium alloys
GB/T 8005.1, Aluminium and aluminium alloy terms and definitions -- Part 1:
Product and method of processing and treatment
GB/T 8170, Rules of rounding off for numerical values and expression and
judgement of limiting values
GB/T 17432, Methods of sampling for analyzing the chemical composition of
wrought aluminium and aluminium alloys
GB/T 20975 (all parts), Methods for chemical analysis of aluminium and aluminium
alloys
YS/T 491, Flux for aluminium and aluminium alloy
3 Terms and definitions
For the purposes of this document, the terms and definitions defined in GB/T 8005.1 as
well as the followings apply.
3.1 recycling materials for wrought aluminium alloys
a) Radioactive materials shall not be mixed;
b) The external radiation penetration dose rate of raw materials (including packaging
materials) shall not exceed the normal natural radiation background value of the
location + 0.25 μGy/h;
c) The α and β radioactive contamination levels on the surface of raw materials are:
the average value of the maximum testing level of 300 cm2 on any part of the
surface shall not exceed 0.04 Bq/cm2 for α and 0.4 Bq/cm2 for β.
6 Test methods
6.1 Foreign material content
6.1.1 General inspection
6.1.1.1 Compacted packages/blocks
Observe whether there are foreign materials inside the compacted packages/blocks.
6.1.1.2 Other raw materials
Visually inspect whether the raw materials are mixed with explosives, sealed containers,
pressure vessels, blocks with organic polymer coatings on the surface, and other foreign
materials. Estimate the mass percentage of foreign materials in the blocks with organic
polymer coatings on the surface and other foreign materials samples (easy to
unpack/blocks need to be disassembled). If it is suspected that the sample does not meet
the requirements, conduct arbitration inspection according to 6.1.2.
6.1.2 Arbitration test
6.1.2.1 Weigh the mass of the sample and record it as m.
6.1.2.2 Manually sort out the blocks with organic polymer coating on the surface, weigh
them, and record them as m1.
6.1.2.3 Calculate the mass fraction of the block covered with organic polymer coating
on its surface wT according to formula (1). Express the value in %. Express the result
to one decimal place. Round off according to the provisions of GB/T 8170.
Where,
m - the sample mass, in kilograms (kg);
7 Inspection rules
7.1 Inspection and acceptance
The supplier shall inspect the product before it leaves the factory. Ensure that the
product quality complies with the provisions of this document and the order (or
contract). Fill in the quality certificate.
7.2 Batching
Raw materials shall be submitted for inspection in batches. Each batch of raw materials
shall consist of blocks of the same category, same ingredient type, same source and
same packaging method. Batch weight and batch weight deviation shall be determined
by negotiation between the supplier and the purchaser.
7.3 Inspection items and sampling
7.3.1 Inspection items
Each batch of raw materials shall be inspected for foreign material content, fracture
structure of recycled aluminium ingots and radioactive contaminants.
7.3.2 Sampling regulations
7.3.2.1 Inspection of foreign material content and fracture structure of recycled
aluminium ingots
7.3.2.1.1 The number of raw materials shipped in containers for unpacking inspection
shall not be less than 50% of the number of containers in the batch. The number of
unpacking inspections shall not be less than 10% of the number of containers in the
batch. Random samples of more than 5% of the net weight of the goods in each
container to be inspected shall be taken.
7.3.2.1.2 The inspection quantity of bulk raw materials shipped by sea shall not be less
than 50% of the number of holds in the batch. The landing inspection shall not be less
than 10% of the number of holds in the batch. Random samples of more than 1% of the
net weight of the cargo in each hold shall be taken.
7.3.2.1.3 Raw materials transported by land shall be subject to 100% on-site inspection.
Random samples of at least 5% of the net weight of the batch of goods shall be taken.
7.3.2.1.4 Take at least 2 samples from each batch. The mass of each sample (preferably
1 bundle/bag/box/package) shall be no less than 1 ton. The samples shall be
representative.
7.3.2.1.5 Carry out inspections of corresponding items at any location where samples
are taken.
7.3.2.2 Radioactive contaminant inspection
100% of the raw materials shall be sampled for inspection.
7.4 Determination of inspection results
7.4.1 The foreign material inspection shall determine double samples in advance. When
the first inspection does not meet the requirements, the second sample can be inspected.
The weighted average is calculated with the first inspection result. If the weighted
average calculation result is qualified, the batch is judged to be qualified; otherwise, the
batch is judged to be not in compliance with the provisions of this document.
7.4.2 The fracture microstructure test of recycled aluminium ingots shall be conducted
with double samples in advance. If the first test fails to meet the requirements, the
second sample may be tested. If the second test result is qualified, the batch of raw
materials shall be judged to be qualified, otherwise the batch shall be judged to be not
in compliance with the provisions of this document.
7.4.3 If the radioactive pollutant test results are unqualified, the batch of raw materials
shall be deemed not to comply with the provisions of this document.
8 Enter-factory inspection and acceptance
The purchaser shall conduct enter-factory inspection and acceptance according to
Annex H. If the inspection results are inconsistent with the provisions of this document
and the purchase order (or contract), they shall be reported to the supplier in writing. If
arbitration is required, it can be entrusted to a unit recognized by both parties and the
purchaser to conduct the inspection and take samples together with the purchaser.
9 Packaging, transportation, storage and quality certificate
9.1 Packaging
9.1.1 The packaging method of raw materials shall be determined by negotiation
between the supplier and the purchaser and shall be specified in the order (or contract).
9.1.2 The packaging shall be labeled with the following information:
a) Raw material category, raw material source;
b) Raw material packaging form [large/small, heavy/light, bulk/easy to open or
compacted (bag or block)];
c) Gross weight;
d) Net weight;
Annex F
(informative)
Vibrating screen
F.1 Working mechanism
The motor rotates to drive the eccentric block, causing the screen frame with holes of
fixed sizes to vibrate regularly, playing the role of shaking the screen, and can separate
materials of different sizes.
F.2 Basic requirements
F.2.1 Main components
The vibrating screen is mainly composed of a vibration system, a screen frame, a
material receiving device, and a shock absorbing device.
F.2.2 Vibration system
The vibration system includes a motor, a speed change device, a rotating shaft, and an
eccentric block.
F.2.3 Screen frame
F.2.3.1 The screen hole size of each screen frame is fixed.
F.2.3.2 The height of the screen frame side shall not be less than 140 mm. The distance
between adjacent screen frames shall be 10 mm~15 mm.
F.2.3.3 There shall be a discharge port at the bottom of the screen frame.
F.2.3.4 The screen frame is easy to disassemble and assemble.
F.2.4 Material receiving device
F.2.4.1 The discharging directions of two adjacent sieve frames with different sieve hole
sizes are the same.
F.2.4.2 The discharging nozzles of the sieve frames with the same discharging direction
extend 400 mm beyond the frame.
F.2.5 Shock-absorbing device
The shock-absorbing spring is installed at the lower end of the vibrating screen frame
and shall be vertical to the ground plane.
Annex G
(informative)
Inspection methods for radioactive contamination
G.1 Inspection instruments
Inspection instruments shall comply with the requirements of GB 18871, GB/T 12162.3
and GB/T 5202.
G.2 Measurement of external radiation dose rate
G.2.1 Measurement of natural environmental radiation background value
G.2.1.1 Before measuring the external exposure penetrating radiation dose rate, the
local natural environmental radiation background value shall be measured and
determined.
G.2.1.2 Select 3~5 points (which can be used as fixed survey points) on flat, open
ground that can represent the local normal natural radiation background status and is
free of radioactive contamination as measurement points.
G.2.1.3 Place the probe of the measuring instrument 1 m above the measuring point.
Measure the external radiation dose rate. Read the measured value once every 10 s.
Take the average value of 10 readings as the measured value of the point. Take the
arithmetic mean of the measured values at each measuring point as the average value
of normal natural radiation.
G.2.2 Patrol inspection
G.2.2.1 Before raw materials pass through the port channel, they shall be inspected for
radioactive contamination. During the inspection, the measuring instrument shall be as
close as possible to the surface of the object being measured or the surface of the
container, vehicle body, warehouse body, etc. that loads the raw materials. The surface
of the object being measured shall be inspected on a regular basis.
G.2.2.2 When radioactivity is found to be significantly above the management limit of
the three testing indicators during the patrol inspection, it shall be judged as unqualified.
When radioactive contamination is found to be above the management limit of the three
testing indicators, no further inspection or selection shall be conducted.
G.2.3 Distribution of test points
G.2.3.1 For vehicles, trains, containers, ships or bulk raw materials piled up for
transportation of raw materials, points can be distributed according to the grid method
Annex J
(normative)
Testing methods for volatile substances
J.1 Method overview
The specimen is heated to a fixed temperature and kept at this temperature until constant
weight is reached. The volatile substance is calculated by measuring the mass loss.
J.2 Testing equipment or devices
J.2.1 Electronic scale: Maximum weighing is not less than 2 kg, with an accuracy of
0.01 g.
J.2.2 High temperature furnace: The working temperature of the high temperature
furnace can reach 500℃. The accuracy is ±5℃.
J.2.3 Specimen plate.
J.2.4 Glass dryer.
J.3 Specimens
J.3.1 Weigh the specimens with an electronic scale and record the mass of the
specimens.
J.3.2 When the capacity of the high-temperature furnace is insufficient, the specimens
can be divided into several parts and tested independently. The mass of each specimen
shall be weighed and recorded.
J.4 Test steps
J.4.1 During the test, when the specimen plate and the specimen are turned around,
clamps or corresponding tools shall be used to avoid direct contact with human hands.
J.4.2 Keep the specimen plate at 360℃ for 8 h, then place it in a glass desiccator and
cool it to room temperature. Weigh the mass and record it as m1. Place it in a glass
desiccator for later use.
J.4.3 Take out the specimen plate from th...