RU2003105591A - METHOD FOR RAIL STEEL Smelting - Google Patents

Claims (1)

A method of smelting rail steel, including filling in scrap electric arc furnace, casting iron, melting, oxidizing period, deoxidation of steel and slag, melting into a ladle, characterized in that the steel is smelted in batches, the first in a series being smelted for 10-15 % more than the weight of the metal filling plant (scrap metal and cast iron), and the latter is 10-15% less than the weight of the metal filling plant, after melting the metal charge, an oxidation period is carried out until the carbon content is not less than 0.60% and the temperature is higher than liquid ca 180-240 ° C, the steel is deoxidized in the furnace, and in the first and subsequent melts, the metal is deoxidized with aluminum in an amount of 0.07-0.10% of the weight of the metal filling, the slag in the furnace is not deoxidized, and in the last heat, the metal is deoxidized with aluminum in the amount of 0.07-0.10% by weight of the metal filling plant, and the slag is deoxidized with coke powder, crushed ferrosilicon and granular aluminum in the amount of each 0.09-0.10% of the weight of the metal filling plant, the release of the first and subsequent melts is arranged with the furnace slag cut off , the last heat - with furnace slag, in a solid slag-forming mixture consisting of lime and fluorspar is planted with lice when released, in the ratio, respectively (1.0-1.5) :( 0.3-0.5) in an amount of 3-3.3% by weight of molten steel, as well as deoxidants and alloying compounds.