Aluminium killed steel refined deoxidizing and desulfurizing synthetic slag

Abstract

The invention discloses aluminium killed steel refined deoxidizing and desulfurizing synthetic slag. A mixture is prepared from the following chemical components in weight percentage: 35-60 percent of CaO+BaO, 5-10 percent of CaF2, 10-30 percent of Al and 20-30 percent of Mg, wherein BaO accounts for 0-10 percent of the total weight percentage of the slag, and the proportion of Mg to Al is 1-1.5.The synthetic slag is convenient and easy to use and has a good deoxidizing effect, can reduce S in liquid steel to be less than 20*10<-6> and has a stable desulfurizing effect. The liquid steel does not resulfurize, the impurity content in the steel is low and a water gap is not blocked if continuous casting is carried out. The invention has simple method of application, obvious liquid steel deoxidizing and desulfurizing effect, obvious effect of reducing the impurity content in the steel and is suitable for producing high-quality clean steel.

Description

technical field [0001] The invention belongs to the technical field of refining in steelmaking production, and particularly relates to refining deoxidation and desulfurization treatment of aluminum killed steel, which has the effects of deoxidizing and desulfurizing molten steel, reducing the content of inclusions in steel, and preventing continuous casting nozzles from being blocked. Background technique [0002] Aluminum is widely used as a deoxidizer in steelmaking. Magnesium is usually used as a deoxidizing and desulfurizing agent for molten steel in steelmaking, but because magnesium has a high vapor pressure and is easy to vaporize and burn, it is difficult to be directly used for deoxidizing and desulfurizing in steelmaking. [0003] The simultaneous use of aluminum and magnesium in steelmaking production has an obvious synergistic effect, showing good deoxidation and desulfurization effects, and better metallurgical effects can be obtained. Many metallurgists alloy ...

AI Technical Summary

Problems solved by technology

The synthetic slag can reduce the content of oxygen and sulfur in molten steel to a certain extent, but with the addition of rare earth elements, it is difficult to remove the generated inclusions, which is not good for molten steel pouring, and the cellulose contained in it may lead to hydrogenation of molten steel

[0007] These alloys and slag agents have their own characteristics, but there are problems such as limited desulfurization effect, difficult removal of inclusions and high cost in application.

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