Study of the possibility of processing hbi sludges in electrometallurgical units

Abstract

The production of direct reduced iron production is accompanied by the generation of by-products, specifically gas purification sludge and metallized fines with a high iron content. Processing this iron poses certain technical and technological challenges. Studies were conducted at the Lebedinsky ore mining and processing plant to analyze the chemical composition, phase distribution, and particle size distribution of iron ore sludge. Pilot smelting of iron-containing hot briquetted iron sludge was carried out in a 100-kW electric arc furnace, resulting in the production of foundry cast iron. The sludge and coke screenings were layered in a ratio of 15 g of coke screenings per 100 g of sludge. Complete melting of the entire charge volume was achieved at 1340 °C. This developed technology is protected by a patent from the Russian Federation.