Uchaly Mining and Metallurgical Combine

 Uchaly Mining and Metallurgical Combine  (UMMC or UGOK Открытое акционерное общество «Учалинский горно-обогатительный комбинат», «Учалы тау-байыҡтырыу комбинаты» Асыҡ акционерҙар йәмғиәте) is a Russian metallurgical combine based in Uchaly, Bashkortostan. In 2016, UMMC incorporated Chelyabinsk Zinc Plant (CZP) and became the largest producer of zinc concentrate in Russia.