Steel ladle bottom argon blowing smelting method

Abstract

The invention provides a steel ladle bottom argon blowing smelting method. The method comprises the following the steps that firstly, two air bricks are mounted on the bottom of a steel ladle, whereinthe height-diameter ratio H / D of the steel ladle is 1.10 to 1.30, the ratio d / D of the diameter of nozzles of the air bricks to the diameter of the bottom of the steel ladle is 0.02 to 0.06, the distance L between the center positions of the air bricks of the steel ladle and the circle center of the bottom of the steel ladle is 0.4 to 0.7 R, and the connecting line included angle A between the center positions of the air bricks and the circle center of the bottom of the steel ladle is 100 to 145 degrees; and secondly, according to a slugging stage in the refining process and a temperature rise and component mixing stage, the argon blowing flow Q of each air brick can be controlled. According to the method, through reasonable arranging of the positions of the air bricks and angle arranging, in cooperation with the reasonable argon blowing control intensity, the molten liquid component uniform efficiency can be improved, the steel ladle bottom argon blowing smelting method with inclusions floating can be facilitated, and the production efficiency of a refining procedure can be greatly improved.

Description

technical field [0001] The invention belongs to the production field of steelmaking and refining processes, and in particular relates to a ladle bottom blowing argon smelting method which improves the refining composition efficiency and facilitates the floating of inclusions. Background technique [0002] Ladle bottom argon blowing technology, also known as molten steel argon blowing treatment, is an out-of-furnace refining process with simple operation and obvious refining effect. Argon blowing at the bottom of the ladle can be used alone or in combination with other refining methods to achieve uniform molten steel composition and temperature, and reduce inclusions and gas content. The argon blowing at the bottom of the ladle is realized through the gas brick or gas supply element at the bottom of the ladle. The position of the gas brick or the gas supply element at the bottom of the ladle is different, and the refining effect achieved by blowing argon at the bottom is ver...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the technical problem that the existing argon blowing technology at the bottom of the ladle is difficult to realize the technical problem that it is not only beneficial to the floating of non-metallic inclusions in the molten steel, but also satisfies the uniform efficiency of the molten steel composition, the invention proposes a method that can simultaneously improve the uniform efficiency of the molten steel composition and facilitate inclusions. Ladle Bottom Blowing Argon Smelting Method with Material Floating

Images