RECYCLING OF BRONZE WASTE IN MACHINE-BUILDING INDUSTRY

Abstract

The use of secondary metals is of crucial importance, since the costs of involving metal waste into circulation are significantly less than for smelting primary metal from ore. Recycling of non-ferrous metal scrap, including bronze, is especially relevant due to the high cost of raw materials. All the methods of scrap metal processing used today are very energy-intensive, so the search for new technologies is relevant. (Research purpose) The research purpose is studying modern methods of processing waste of non-ferrous metals and alloys in machine-building industries, identifying problems and disadvantages of such methods; proving the expediency of the use of electroerosive dispersion in the recycling of scrap metal. (Materials and methods) Used an integrated approach, which included the analysis of literary and patent sources, scientific papers. The research was carried out on laboratory equipment of the FNAC VIM Nano-Center. (Results and discussion) We studied various methods of processing machine-building waste of non-ferrous metals and alloys, identified the disadvantages of these methods, and proposed an electroerosive dispersion method as a promising one. It was determined that in modern repair production, welding and surfacing processes are used in more than 60 percent of cases to restore the operability of worn parts. Surfacing allows alloying, controlling the hardness and microstructure of the deposited layer. Powder materials for the technologies of restoration and hardening of parts are economically more profitable, since the manufacture of wire or rods from hard and brittle materials requires expensive special methods. (Conclusions) Recycling of metal waste, especially non-ferrous metals and alloys, gives a tangible economic effect for the economy. The use of new promising technologies helps to reduce the energy intensity of recycling processes.