Authors: A.Yu. Konyaev, K.V. Kuznetsov, I.V. Chernykh

Title of the article: Improving the selectivity of eddy-current separation of crushed non-ferrous scrap metal

Year: 2025, Issue: 6, Pages: 95-105

Branch of knowledge: 2.4.2. Electrotechnical complexes and systems (engineering)

Index UDK: 622.67

DOI: 10.26730/1816-4528-2025-6-95-105

Abstract: One of the modern trends in the economy is the constant growth of the share of metals smelted from secondary raw materials. One of the constantly growing sources of secondary raw materials of non-ferrous metals is waste from electrical and electronic equipment, as well as automobile scrap. The peculiarity of such metal-containing waste is their multicomponent nature and the presence of intergrowths of materials. Multistage crushing is necessary to open such materials. After that, various separation methods (magnetic, electrical, eddy-current, vibropneumatic separation, etc.) are used to separate individual fractions. Eddy-current separation in traveling or rotating magnetic fields is most widely used to separate non-ferrous metals from a flow of non-metals. Eddy-current separators can also be used to sort crushed non-ferrous scrap metal by types and groups of alloys. The article presents the main designs of eddy-current separators used to solve the above technological problems. It is shown that when solving the problem of sorting crushed scrap non-ferrous metals, it is advisable to use eddy-current separators based on double-sided linear inductors with material feed along an inclined plane. When developing such eddy-current separators, the main parameters of the units must be selected taking into account the criteria of performance, energy efficiency and selectivity. The article provides examples of such a choice. The main attention is paid to the selectivity indicators that determine the quality of sorting metals and alloys. Based on theoretical and experimental studies, factors reducing the selectivity of separation are identified. The need to search for ways to increase selectivity in order to improve the quality of sorting metals and alloys is substantiated. Theoretical studies are based on modeling of electromagnetic and electromechanical processes in the separators under consideration. Based on the results of such studies, the possibilities of increasing the selectivity of separation are determined. The obtained recommendations are confirmed in the course of experimental studies of pilot eddy-current separation units

Key words: non-ferrous scrap metal eddy-current separation comparison of designs performance evaluation separation selectivity selectivity coefficient ways to improve selectivity

Receiving date: 05.07.2025

Approval date: 14.11.2025

Publication date: 18.12.2025

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