A kind of rapid white slag production material and technology for 120tlf refining furnace

Abstract

The invention belongs to the technical field of steel smelting, and in particular relates to a rapid white slag making material and process for a 120tLF refining furnace, comprising the following components by weight percentage: 8-10% of aluminum powder, 50-60% of ferrosilicon powder, and carbon powder 25‑30% and calcium fluoride 5‑10%. The white slag making material and process provided by the present invention, calcium fluoride can lower the melting point of slag, adjust the fluidity of slag, the addition of aluminum powder can realize rapid deoxidation and white slag, the addition of carbon powder can promote the formation of long-arc foam slag, ferrosilicon powder can promote the stable maintenance of white slag; the degree of deoxidation of converter molten steel is deep, and the content of ferrous oxide in the slag entering the station is low; the reuse of the liquid reduction refining slag from the previous furnace can promote rapid slagging; the invention can promote rapid desulfurization and deoxidation of 120tLF furnace , Adsorption of inclusions, fast slag formation, stable white slag.

Description

technical field [0001] The invention belongs to the technical field of steel smelting, and in particular relates to a rapid white slag making material and process for a 120tLF refining furnace. Background technique [0002] Converter steelmaking generally adopts ladle refining technology, which transfers all or part of the deoxidation, desulfurization, gas reduction, inclusion reduction, steel composition and temperature adjustment to the ladle furnace in the steelmaking process, in order to obtain clean steel and high yield , high quality, low cost and good effect. In the ladle refining process, the selection of refining slag is very important. [0003] The white slag operation is the core operation of the LF refining furnace. The existing white slag production process of the LF refining furnace is: add lime and slagging agent to make slag after entering the station, and add appropriate amount of ferrosilicon powder, silicon carbide or carbon powder for deoxidation at the ...

AI Technical Summary

Problems solved by technology

[0003] The white slag operation is the core operation of the LF refining furnace. The existing white slag production process of the LF refining furnace is: add lime and slagging agent to make slagging after entering the station, and at the same time add appropriate amount of ferrosilicon powder, silicon carbide or carbon powder for deoxidation. The speed of slag formation is slow, the time for slag formation is long, and the white slag is unstable