Ladle desulfurization refining slag

Abstract

The invention discloses a ladle desulfurizing refining slag which comprises active lime, fluorites and aluminum powder or aluminum pellets. The weight percentage of compositions of the invention is that: the active lime: 80 percent to 90 percent; the fluorites: 10 percent to 15 percent; the aluminum powder or the aluminum pellets: 2 percents to 5 percent. By adoption of the invention, 10 percent to 20 percent of sulphur in a ladle is removed and 40 percent of the sulphur in the ladle is removed at maximum, and the effect is very obvious.

Description

technical field [0001] The invention relates to a ladle molten steel desulfurizer, in particular to a ladle desulfurization refining slag. Background technique [0002] When steelmaking enterprises smelt high-quality steel, they often need to control and eliminate sulfur in molten steel. In actual production, either due to the high sulfur content of the iron ore itself, the sulfur content in the hot metal is relatively high (average > 100PPM), or the desulfurization capacity is insufficient due to the desulfurization equipment itself and the site problem, resulting in the production of smelting high-quality steel. The rate is relatively low. In order to reduce the sulfur content in finished steel, methods such as molten iron desulfurization, semi-steel desulfurization, and converter desulfurization have been adopted at present, but these methods inevitably require more or less part of the slag during the tapping process, resulting in unstable desulfurization effects. Th...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the unsatisfactory desulfurization effect of the current ladle molten steel refining and subsequent refining processes, the invention provides a ladle desulfurization refining slag