Glass Bottle Sorting Machine | AISORT
Application Overview — Glass Recycling
Glass Bottle Sorting in Modern Recycling Facilities
Glass bottle sorting is the critical first step in closed-loop glass recycling. Cullet (crushed recycled glass) must be separated by color (flint/clear, amber/brown, green) and freed from contaminants (ceramics, stones, metals, organics) to meet furnace specifications. Optical sorting achieves color purity of 98-99.5%, enabling bottle-to-bottle recycling that reduces furnace energy by 2-3% per 10% cullet addition.
Material Characteristics and Sorting Challenges
Glass sorting challenges include: distinguishing ceramic and stone contaminants that have similar optical properties to glass; handling mixed-color cullet where amber and green overlap spectrally; removing lead crystal and heat-resistant glass (e.g., Pyrex) that have different melting points and can damage furnaces; and managing fines and dust that coat sensors.
Recommended Sorting Technology Stack
RGB camera (color separation: flint vs amber vs green) + NIR or hyperspectral (ceramic/stone/porcelain detection) + induction (metal removal). For high-purity furnace-ready cullet, a two-pass RGB sort followed by ceramic detection is standard. Throughput: 10-30 t/h per meter width.
Performance Benchmarks
| Metric | Target |
|---|---|
| Color Purity | 98-99.5% |
| Ceramic Removal | >95% |
| Throughput | 10-30 t/h/m |
| Cullet Size | 5-60mm |
These benchmarks represent achievable performance with modern sensor-based sorting equipment, assuming properly sized, well-maintained equipment operating on representative feedstock. Actual results depend on specific material composition, throughput, and operating conditions.