RU2000120818A - METHOD FOR Smelting Low-Carbon Vanadium-Containing Steel With Increased Strength And Cold Resistance - Google Patents

Claims (2)

1. A method of smelting low-carbon vanadium-containing steel of increased strength and cold resistance, including steel smelting in a converter from a carbon intermediate, the release of metal into a ladle with slag cut-off, the introduction of vanadium slag and deoxidizers into the ladle, purging the melt with argon, finishing the steel according to the chemical composition and temperature of the installation ladle furnace, evacuation of steel in a circulating vacuum device, characterized in that the carbon intermediate is purged with oxygen in a two-stage converter with intermediate loading by slag and cindering of new slag with a basicity of at least 3, while vanadium slag is introduced into the ladle in the amount of 4-6 kg / t of steel together with lime at a ratio of 1: 1, after transferring the ladle with metal to the furnace bucket "slag-forming materials are introduced into it and the melt is deoxidized. aluminum, then vanadium slag is introduced in an amount of 8-12 kg / t of steel together with lime at a ratio of 1: 0.8 and ferroalloys in the amount necessary to restore vanadium and adjust the chemical composition of the steel.  2. The method according to p. 1, characterized in that the lime-alumina slag in the amount of 4-7 kg / t of steel is introduced as a fluidizing material in the ladle furnace.