Overview
Solid granular metal scrap consists of small metal particles typically ranging from 1mm to 10mm in size, produced as byproducts in machining, casting, or metal fabrication processes. These materials represent valuable secondary raw materials for metal recycling industries. Common sources include metal grinding operations, shot blasting residues, and crushed metal waste. The composition varies widely, including ferrous metals like steel and iron, non-ferrous metals such as aluminum and copper, and sometimes precious metals in specialized applications.
Physical and Chemical Properties
The physical characteristics of granular metal scrap depend on the source material and production method. Particles often exhibit irregular shapes with sharp edges, and surface oxidation is common depending on storage conditions. Chemically, these materials retain the properties of their base metals but may contain surface contaminants or oxides. Magnetic separation can distinguish ferrous from non-ferrous materials. The bulk density varies significantly, affecting transportation and handling considerations in industrial applications.
Main Applications
Primary use is as feedstock for metal recycling facilities, where it undergoes melting and purification processes. Foundries utilize granular scrap for alloy production due to its rapid melting characteristics compared to bulk scrap. In specialized applications, certain high-purity granular metals serve as raw materials for powder metallurgy and 3D printing processes. The automotive and construction industries are major consumers of recycled granular metal products.
Safety and Storage
Proper handling requires PPE including gloves and eye protection due to sharp edges. Dust control measures are essential when processing large quantities to prevent respiratory hazards. Storage should prioritize dry conditions to minimize oxidation. Segregation by metal type prevents contamination. Fire prevention is critical for reactive metals like magnesium or aluminum fines, which can pose explosion risks in powder form.
B2B Procurement Guide
Industrial buyers should specify desired metal composition, particle size distribution, and maximum contamination levels. Sampling and assay verification are recommended for high-value transactions. Consider proximity to suppliers to minimize transportation costs, as granular metals have lower density than solid scrap. Establish quality control protocols for incoming materials, including spectroscopic analysis for alloy verification when purity is critical.
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