Modifier for ladle deoxidation and slag formation and method for producing the same

Abstract

The invention discloses a ladle deoxidizing-slagging modifier, which comprises active white lime, metal powder, bauxite, limestone powder and a fluxing agent. The modifier is characterized in that the modifier is a spherical particle which is made from the materials and has a double-layer or three-layer structure. The modifier has the advantages that under the same component conditions, the steel slag modifier adopting the structure has faster melting-slagging performance as compared with the modifiers in other forms (such as premelted type and mixed type), increases the melting-slagging speed by more than 15 percent, raises the utilization rate of metallic simple substances (such as aluminum) by more than 20 percent, and improves oxygen removing effect.

Description

technical field [0001] The invention belongs to the field of metallurgy, and relates to ladle slag making, dilution method and reduction method steel slag modification treatment technology, in particular to a slagging modification agent for ladle deoxidation and a manufacturing method. Background technique [0002] Elimination and control of highly oxidizing slag is one of the key links in pure steel smelting. It refers to the modification treatment of molten steel top slag in the ladle to reduce and control the oxidation of steel slag. The modification treatment of ladle top slag generally adopts slag removal Treatment, dilution or reduction and other ways to deal with. The slag removal treatment is to remove the highly oxidizing steel slag from the surface of molten steel by mechanical means and then recreate new slag to reduce and control the oxidation of steel slag; the dilution method is to reduce the concentration of oxidizing substances in steel slag by increasing the...

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Problems solved by technology

In addition, through searching, it can be found that many patents are constantly improving and improving the steel slag modifier from the perspective of controlling the composition and processing and manufacturing, and ignoring the influence of the structure of the modifier on its use.

[0006] At present, the production process of modifiers needs to be melted, and the uniformity of raw material mixing is difficult to guarantee. Generally, a large amount of modifiers are fixed in composition, but a small amount of sampling analysis can find that the composition deviation is large, which leads to In particular, the application of small batches per heat will cause large deviations in composition, which will affect continuous and stable steelmaking production

[0007] The slag-forming agent in ordinary modifiers is mainly metallurgical lime or activated lime, which is characterized by easy water absorption and denaturation, which will affect the use effect. If the lime undergoes water absorption and denaturation during production, packaging, and transportation, it will seriously affect the modifier. Melting speed, slagging performance

[0008] When the reducing agent component in the modifier is used, it may cause the loss of effective reducing agent due to the reaction with oxygen in the air, which will affect its reduction of oxidizing substances in steel slag

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