To the article “Utilization of Mineral Waste: A Method for Expanding Resource Base a Mining and Smelting Company,” by J. Rybak, S. M. Gorbatyuk, K. Ch. Bujanovna-Syuryun, A. Khairutdinov, Yu. Tyulyaeva, P. Makarov, Vol. 64, Nos. 9-10, pp. 851–861, January, 2021