| 摘要 |
1. A method for the recovery of metallic fractions, especially of copper and its alloys, from metallurgical ash and slag, consisting of feeding the metallurgical material into a ball mill for mechanical fragmentation, wherein air is fed into a milling chamber (2) via a ventilating system pipe (3) during the fragmentation of the metallurgical material, drawing in light floating non-metallic dust and pre-separating it from metallic fractions with a higher specific gravity, then guiding it via the pipe (3) conduit to a settling tank (4), in which further portions of the non-metallic fractions fall into a chute receiver (5), and then the lightest particles of the non-metallic fractions are guided via the pipe (3) conduits to a pulsating filter (6), where they fall into a chute hopper (7), whereas the air is cleaned via the pulsating filter (6) elements (8) and exits outside via a fan (9).
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