Production of Carbon Materials from Nonclinkering Coal in Electric Roasting Furnaces

Resumo

Abstract—This article addresses the production of carbon materials in an electric roasting furnace, which is a universal device covering a broad temperature range (500–1400°C). It is simple in structure, completely automatic, and characterized by high productivity and economic efficiency. Pieces of nonclinkering D, SS, T, and A coal may be heated in such furnaces. In appropriate conditions, coke may be produced from DG coal (W ^r = 8.5%, A^d = 10.4%, V^daf = 45.3%, and y = 6 mm). Such coke meets many of the requirements on reducing agents for ferroalloy production: A^d = 14.6%, V^daf = 1.6%, C_fix = 84%; reactivity \({{K}_{{{\text{C}}{{{\text{O}}}_{2}}}}}\) = 4.87 cm³/g s; porosity 54.6%; and structural strength 77.5%. The coke is tested in industrial furnaces in producing ferrosilicomanganese alloy (MnS17 alloy). It permits 44.8% increase in productivity; 6.9% decrease in power consumption; and increase in manganese extraction to 83%. High-quality roasted anthracite may be produced in the electric roasting furnace. The use of such anthracite in the electrode mass permits the production of electrodes for ferroalloy furnaces without the need for Donetsk roasted anthracite or blast-furnace coke. The production of carbon materials in an electric roasting furnace is organized in accordance with specific technological instructions, including requirements on the raw materials and the products.