When procuring a recycling baler, you must prioritize nominal pressure (tonnage) and cycle time. For aluminum cans, a press force of 30 to 60 tons is standard for medium operations, while industrial facilities require 100+ tons. Ensure the machine features wear-resistant manganese steel plates in the compression chamber to handle the abrasive nature of metal. Additionally, verify the bale density (e.g., 400-600 kg/m³) to ensure it meets the requirements of smelting plants or secondary processors.