Sarmak Mining Company, with over 50 years of experience, started its activities in 1972 by extracting lead from the Ahangaran mine in Malayer. This company is recognized as a knowledge-based company and has several registered inventions in the field of mineral processing. In addition to extraction, it is also active in the production of various mineral products such as lead sulfide concentrate, lead and zinc oxide, and hematite iron ore, and is recognized as a model provincial producer and exporter. Sarmak processing plant complex is located in Ahangaran Mining and Industrial Complex in Malayer, which is equipped with various lines, including crushing, milling and processing lines using furnaces and flotation methods. The company is trying to process low-grade and resistant rocks by using pyrometallurgical and hydrometallurgical methods and produce quality products such as lead and zinc concentrate. Sarmak Mining Company also has inventions such as the RHF furnace, which is unique due to its features such as reducing pollutants and recovering valuable metals.