Profitability of Conveyor Belt Refurbishment and Diagnostics in the Light of the Circular Economy and the Full and Effective Use of Resources Energies, 2022, Vol. 15, No. 20 Agata Kirjanów-Błażej Aleksandra Rzeszowska Dominika Olchówka Leszek Jurdziak Mirosław Bajda Ryszard Błażej 1/1