As the replacement cycle of automobiles and motorcycles accelerates, the amount of scrapped aluminum alloy wheel hubs increases year by year. The scrap aluminum wheel crushing material obtained by processing these hubs through dedicated crushers has become a high-value raw material in the non-ferrous metal recycling industry. This article provides a detailed interpretation of key technical parameters, composition indicators, and downstream applications of scrap aluminum wheel crushing material, helping recycling companies assess material value more accurately.
1. What is Scrap Aluminum Wheel Crushing Material?
Scrap aluminum wheel crushing material refers to the granular or flake aluminum metal mixture obtained after shredding, crushing, magnetic separation, eddy current separation, and other processes, primarily using aluminum alloy wheel hubs from cars and motorcycles as raw materials.
Its main component is cast aluminum alloy (such as A356 and ZL101), with small amounts of rubber, iron inserts, steel wheel balance weights, and other impurities. After efficient processing, the aluminum purity can reach 95%-98%, making it an ideal furnace charge for secondary aluminum smelting.
2. Key Parameters at a Glance
The following table lists typical physical and chemical parameters of scrap aluminum wheel crushing material, serving as a reference for procurement and process design.
| Parameter Item | Typical Range | Remarks / Recommendations |
|---|---|---|
| Particle Size | 10-80mm | Depends on crusher screen aperture; commonly 20-50mm |
| Bulk Density | 0.8-1.2 t/m³ | Loose state, moisture below 2% |
| Aluminum Content | 94%-98% | Can exceed 96% after magnetic separation and eddy current separation |
| Iron Content | 0.5%-3.0% | Mainly from wheel bolts, valve stems and iron fines |
| Copper / Zinc | ≤0.5% | Trace amounts only |
| Non-Metallic Impurities | 0.5%-2.0% | Rubber, paint and coatings |
| Moisture Content | ≤1.5% | Drying recommended after outdoor storage |
| Aluminum Recovery Rate | ≥96% | With proper crushing and sorting system |
| Smelting Oxidation Loss | 2%-4% | Depends on melting process |
3. Effect of Particle Size on Recycling Value
The particle size distribution of scrap aluminum wheel crushing material directly affects smelting efficiency and transportation costs.
Fines below 10mm have high bulk density but are more prone to oxidation loss during melting.
Particles between 10mm and 30mm provide the best balance between melting efficiency and recovery value.
