EXPERIENCE OF USING KGOK IRON ORE RAW MATERIALS AT THE NIZHNY TAGIL METALLURGICAL COMBINE DURING SMELTING OF OPEN-HEARTH CAST IRON

With the commissioning of the Kachkanar mining and processing plant in 1963, the smelting of two types of cast iron began in the blast furnace shop, namely pig (open-hearth) iron (at the place of further processing) and vanadium. With the launch of the pellet factory, production in Kachkanar increased, followed by the introduction of up to 30% of titano-magnetite raw materials in the charge of blast furnaces that smelted pig iron. The thermal regime of the furnaces was adjusted to reduce the silicon content in cast iron from 0.60-0.70 to 0.40-0.45%. The second advantage of using KGOK iron ore raw materials in blast furnaces lies in the production of a chemically and thermally wear-resistant titanium accretion qualitatively different from that of the blast furnaces of the USSR.