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1. Core Indicator Verification: High-quality equipment must meet the following requirements: copper granule purity >= 99.5%, residual copper content in the plastic sheath <= 0.3%, and a sorting rate of over 98% for mainstream qualified models in the industry. These are the core criteria for judging sorting performance.

2. Actual Material Testing Verification: Testing with fine, impure wires with low copper content (such as headphone cables, data cables, and automotive thin cables) is conducted. If almost no visible copper wires are found in the wire sheath, the fine material sorting capability meets the standard. When processing regular, thicker cables, the absence of obvious plastic impurities in the copper granules proves that the sorting performance is qualified.

3. Process Configuration Verification: Models processing fine impurities smaller than 3mm must be equipped with both an airflow gravity separator and a high-voltage electrostatic separator. Relying solely on airflow separation cannot effectively purify fine copper wires and will directly reduce the sorting efficiency.

4. Operational Status Verification: Check the levelness of the equipment placement, whether the screen aperture matches the processing wire, and confirm that the amplitude and air volume frequency converter of the airflow separator can be adjusted in a coordinated manner. During operation, the material output is uniform and there is no deviation. These details directly determine the actual sorting stability.