GB/T 8005.4-2022 Aluminium and aluminium alloy terms and definitions—Part 4：Aluminium scrap
This standard is developed in accordance with the rules given in GB/T 1.1-2020 Directives for standardization — Part 1: Rules for the structure and drafting of standardizing documents.
This document is Part 4 of GB/T 8005 Aluminium and aluminium alloy terms and definitions. The following parts of GB/T 8005 have been published:
——Part 1: Product and method of processing and treatment;
——Part 2: Chemical analysis;
——Part 3: Surface treatment terms;
——Part 4: Aluminium scrap.
Aluminium and aluminium alloy terms and definitions – Part 4: Aluminium scrap
1 Scope
This document defines the terms and definitions of aluminium scrap (scrap aluminium recycled after classification and used for recycled aluminium and aluminium alloys, which may be contaminated or mixed with foreign material).
This document is applicable to aluminum recovery and recycling in electrolytic aluminum industry, deformed aluminum and aluminum alloy industry, cast aluminum alloy industry and aluminum powder industry.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute indispensable provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 38472 Recycling materials for cast aluminium alloys
GB/T 40382 Recycling materials for wrought aluminium alloys
GB/T 40386 Recycling materials for pure aluminium
3 Material
3.1
aluminum material
generic term for pure aluminum or aluminum alloy materials
3.2
foreign material
generic term for inerts and non-aluminium metals
3.3
free iron
magnetized or unmagnetized ferrous metals
3.4
inerts
component that neither significantly changes the chemical composition of the material in the molten state nor leads to an increase in the content of aluminum and aluminum alloys in the material
Note: Including wood, textiles, plastics, glass, stone, paper, sand, rubber, sludge, oil stain, crystalline salt, fiber powder, dry paint ink, water, oil and other fluids, excluding packaging materials and other substances needed in transportation
3.5
contaminant
material that can negatively affect the quality of recycled aluminum or can lead to risks in the recycling process without proper monitoring and management
3.6
volatile substance
inerts that can be separated from materials by proper heating treatment at temperatures below the melting point of aluminum
Note: Includes the following substances:
——Free water attached to the material and recognizable during delivery is called moisture. Materials may attract moisture in the process of production, recovery, storage or transportation;
——Organic matter such as grease and emulsion attached to materials.
3.7
compacted scrap
materials that are pressed or compacted in the form of cakes, bags or block
Note: The two main types are as follows:
——Densified scrap, which may be manually disassembled into loose scrap;
——Briquetted scrap, which is difficult to disassemble manually and the scrap is bonded firmly
3.8
loose scrap
material that can be removed from any individual scrap in a loose state
Note: Materials can be bare or packed in bags, boxes, or be bundled, or wrapped.
3.9
shredded scrap
shredded material obtained by cutting or crushing materials with crushers, hammer mills or shears
Note: Materials with sizes between 1 mm and 100 mm are called granulated scrap.
3.10
same designation scrap
material with the same aluminum material designation
3.11
mixed scrap
material with different aluminum material designation
Note: It mainly includes the following three types:
——Aluminum material composed of wrought aluminum and aluminum alloy materials of the same designation, or material composed of cast aluminum alloy materials of the same group code, which is called same designation series scrap;
——Aluminum material composed of a mixture of wrought aluminum and aluminum alloy materials of multiple designations and series, or material composed of cast aluminum alloy materials of multiple groups and codes, which is called different design series scrap;
——Aluminum material composed of a mixture of wrought aluminum alloy and cast aluminum alloy, which is called multiplex scrap.
3.12
high-content scrap
materials whose content of alloying elements exceeds the standards recognized by the supplier and the purchaser
Note: It mainly includes the following six types:
——Materials whose zinc content exceeds the standards recognized by the supplier and the purchaser are called high-zinc scrap;
——Materials whose magnesium content exceeds the standards recognized by the supplier and the purchaser are called high-magnesium scrap;
——Materials whose silicon content exceeds the standards recognized by the supplier and the purchaser are called high-silicon scrap;
——Materials whose copper content exceeds the standards recognized by the supplier and the purchaser are called high-copper scrap;
——Materials whose manganese content exceeds the standards recognized by the supplier and the purchaser are called high-manganese scrap;
——Materials whose iron content exceeds the standards recognized by the supplier and the purchaser are called high-iron scrap.
3.13
aluminium breakage
materials whose aluminum material content is not less than 33%, mixed with a large number of foreign materials
Note: Foreign materials include iron, dirt, plastics and other materials.
Foreword i
Introduction ii
1 Scope
2 Normative references
3 Material
4 Recovery processing
5 Inspection
6 Others
Index
