Slag synergist

Abstract

The invention relates to a slag synergist which comprises the following components according to the parts by weight: 40-60 parts of CaO, 12.5-18.5 parts of Na2O+B2O3, 4-10 parts of SiO2 and 0-6 parts of rare earth. The physical and chemical indexes of the synergist are that the melting rate is not more than 8 seconds, the melting point is not more than 830 DEG C, the particle size is 0-10mm and the weight percent of moisture is not more than 0.5%. The beneficial effects of the invention are as follows: 1. after the flushing and mixing of the slag synergist and the steel slag, the surface activity of the steel slag can be effectively regulated so as to promote the slag-iron separation, effectively recycle metal particles in slag to molten steel and increase the recovery to more than 45%; 2. the viscosity of the steel slag can be effectively reduced, slag adhesion and slag adhering can be effectively avoided at the slag lining, the deslagging and the slag removal are thorough, and the mechanical slag removal for steel ladles can be avoided; 3. the slag synergist has a certain desulphurizing ability and can effectively prevent resulfurization.

Description

【Technical field】 [0001] The invention belongs to the technical field of high-alloy steel smelting, and relates to a slag synergist which can effectively adjust the interface activity of steel slag, effectively reduce the viscosity of steel slag, has a certain desulfurization ability, and can effectively prevent resulfurization. 【Background technique】 [0002] In the smelting process of high-alloy steels, sticky top slag often occurs, which is mainly caused by alloy oxidation and enrichment in top slag, which changes the original slag system. The top slag sticking phenomenon causes serious slagging at the top of the ladle, especially at the slag line, which affects the use efficiency of the ladle. At present, steelmaking plants mainly use mechanical methods to forcibly break or peel off the sticky slag agglomerates at the slag line of the ladle. Although the method can remove the sticky slag agglomeration, when the strong mechanical force removes the sticky slag agglomerate,...

AI Technical Summary

Problems solved by technology

The top slag sticking phenomenon causes serious slagging at the top of the ladle, especially at the slag line, which affects the use efficiency of the ladle. At present, steelmaking plants mainly use mechanical methods to forcibly break or peel off the sticky slag agglomerates at the slag line of the ladle. Although the method can remove the sticky slag agglomeration, when the strong mechanical force removes the sticky slag agglomerate, it will often destroy the ladle refractory material with sticky slag, which greatly reduces the service life of the ladle