Method for increasing temperature rise speed of ladle refining furnace

• Main Authors: LI XIAOYAN, CHEN KAIFENG, ZHAI YOUYOU, KONG JINSONG, HUANG WENSHENG, HU MING, FAN WEI, WANG LIZHOU
• Format: Patent
• Language: Chinese; English
• Published: 08.12.2023
• Subjects: CHEMISTRY; METALLURGY; METALLURGY OF IRON; PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS

The invention discloses a method for increasing the temperature rising speed of a ladle refining furnace. The method comprises the following steps that a, hot slag is added into a ladle; b, after the molten steel enters a steel ladle heating position, within the first 5 min of smelting, CO2 is blown into a steel ladle through a steel ladle bottom blowing system, a foaming agent is added into a steel ladle furnace, foamed slag is rapidly formed in the steel ladle, the electrode arc current is adjusted to be 25000A, the electrode arc pressure is adjusted to be 120V, and the temperature of the slag is rapidly increased to 1500 DEG C or above; c, within 5-10 min of smelting, argon is blown into the steel ladle, the electrode arc current is 15000 A, the voltage is 120 V, so that the stability of the electric arc is kept, and a refining slag modifier is added; d, after smelting is conducted for 10 min, active lime is added, the bottom blowing flow of a steel ladle is adjusted to be 1-5 m < 3 >/h, the electrode arc