Aluminium Scrap

Description of Aluminium Scrap
Aluminium scrap refers to discarded or leftover aluminium materials that can be recycled and repurposed. This scrap is a valuable resource in the recycling industry due to aluminium's properties, such as its lightweight nature, corrosion resistance, and ability to retain its properties through multiple recycling processes. Aluminium scrap comes from various sources including manufacturing leftovers, old aluminium products, building materials, and packaging.

Recycling aluminium scrap is both environmentally and economically beneficial. It reduces the need for primary aluminium production, which is energy-intensive, and helps in conserving natural resources. Aluminium scrap is categorized based on its source, composition, and condition. The categories typically include clean aluminium scrap, painted or coated aluminium, aluminium alloys, and mixed aluminium scrap. Proper sorting and processing of aluminium scrap are crucial for ensuring the quality of the recycled material.

Specification for Aluminium Scrap
1. General Requirements:
Purity: Minimum 95% aluminium content.
Form: Can be in various forms such as sheets, wires, cans, extrusions, castings, or mixed shapes.
Condition: Free from excessive corrosion, oil, dirt, plastic, and other non-metallic materials.
2. Categories:
Clean Aluminium Scrap:

No attachments, coatings, or contaminants.
Free from iron, brass, rubber, or other non-aluminium metals.
Typically includes sheets, extrusions, and castings.
Painted or Coated Aluminium Scrap:

Includes aluminium with paint, lacquer, or other coatings.
Must be free from significant non-aluminium metal attachments.
Common sources include siding, gutters, and painted extrusions.
Aluminium Alloys:

Specific alloys identified by standard alloy numbers.
Must be sorted and free from significant contamination by other alloys or metals.
Mixed Aluminium Scrap:

Combination of various forms of aluminium, may include some attachments.
Requires additional sorting and processing to separate different grades.
3. Physical Properties:
Thickness: Varies depending on the form, typically 0.2 mm to 5 mm for sheets.
Size: Should be manageable for transportation and processing, often cut to specified dimensions.
4. Contaminants:
Maximum Allowable:
Iron: â?¤ 1% by weight.
Plastic, Rubber, and Non-metallics: â?¤ 1% by weight.
Other Non-aluminium Metals: â?¤ 2% by weight.
Oil and Grease: â?¤ 0.5% by weight.
5. Packaging and Labeling:
Bales or Bundles: Securely tied and compacted to prevent spillage and ensure efficient handling.
Labeling: Clearly marked with the category of scrap, weight, and origin.
6. Inspection and Testing:
Visual Inspection: To ensure compliance with specified categories and absence of prohibited contaminants.
Chemical Analysis: Spectroscopic methods to determine aluminium content and presence of other elements.
Weight Verification: Accurate measurement of scrap weight befor