Method for preparing slag washing material for producing aluminum killed steel

Abstract

The invention relates to a method for preparing a slag washing material for producing aluminum killed steel. The method comprises: (1) uniformly mixing limestone, bauxite and aluminum powder, and adding potassium carbonate; and (2) placing an obtained slag material accounting for 30-50% of the total weight into a heating furnace, carrying out heating melting, adding the remaining slag material, stopping the electrifying after all the slag material is molten, naturally cooling, and physically breaking. According to the present invention, the slag system has good deoxidation ability and good desulfurization ability; and by using Al as the reducing agent and the heat generation agent, the oxidizing property of the slag is reduced, and the temperature decreasing caused by the heat absorption during the melting of the slag material added during the steel discharging process can be subjected to heat generation compensation with the heat released by the heat release reaction.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and particularly relates to a method for preparing slag washing material for producing aluminum-killed steel. Background technique [0002] As users have higher and higher requirements for steel quality and market competition is becoming increasingly fierce, domestic iron and steel enterprises are paying more and more attention to the smelting technology with higher efficiency and lower cost in the process of iron and steel smelting. The "converter-LF refining-continuous casting" process is generally adopted for low-carbon aluminum killed steel at home and abroad. This process not only has a long process, but also has certain problems in production organization and scheduling management. The LF refining process consumes slagging materials, refractory materials, graphite electrodes, Ar gas and electricity, etc., resulting in large resource and energy consumption and high cost; moreover, some lo...

AI Technical Summary

Problems solved by technology

[0003] In order to meet the above technical requirements, a series of slag washing materials and slag washing technologies have been developed in recent years, which can partially replace the LF refining furnace, but part of the pre-melted slag is generally used, and then used in the form of mechanical mixing or pressing balls. The melting temperature of the slag washing materials Both are higher than pre-melted slag, slagging time (melting time) is lower than pre-melted slag, and there is some dust; in addition, the ingredients also contain C, paraffin, BaCO 3 And fluorite, etc., in the process of use, there are generally problems such as large smoke, large dust, and fluorine content, which pollute the environment