Low-carbon aluminum-containing cold forging steel smelting process

Abstract

The invention discloses a low-carbon aluminum-containing cold forging steel smelting process, and relates to the technical field of steel production. Comprising the steps that high-aluminum ferromanganese and a low-carbon ferromanganese alloy serve as raw materials, the relational expression between end point carbon and end point oxygen during tapping of the low-carbon aluminum-containing cold heading steel is calculated, the adding amount of the high-aluminum ferromanganese is calculated, aluminum wire feeding micro-regulation operation is conducted according to the requirement for the acid-soluble aluminum content, the Fe-Ca wire feeding amount is calculated according to the acid-soluble aluminum content and the calcium-aluminum ratio, and continuous casting protection pouring is conducted. The continuous casting blank is heated and then continuously rolled; high-aluminum ferromanganese is adopted as a main deoxidizing agent, the adding amount of the deoxidizing agent is determined according to the corresponding relation between converter smelting end-point carbon and end-point oxygen, converter end-point molten steel oxygen determination operation can be omitted, and therefore oxygen determination detection cost is saved, the high-aluminum ferromanganese is adopted for molten steel deoxidation and alloying, and the content of molten steel acid-soluble aluminum is directly increased; and after the molten steel enters an argon blowing station, the goal of reducing or not feeding aluminum wires can be achieved.

Description

technical field [0001] The invention relates to the technical field of iron and steel production, in particular to a smelting process for low-carbon aluminum-containing cold heading steel. Background technique [0002] The oxygen content of molten steel at the end of converter smelting is mainly related to the end-point carbon content, end-point manganese content, end-point temperature and final slag TFe content. When the content of strong elements is high, the oxygen in the steel is determined by the content of these elements with strong deoxidation ability. As these deoxidizing elements are quickly oxidized, when these deoxidizing elements are in trace amounts in molten steel, the oxygen content in the steel is mainly determined by the carbon content in the molten steel. % or less, when the end-point carbon control is low, the end-point temperature and end-point manganese content have little effect on the oxygen content of molten steel, and the final slag TFe cannot be ob...

AI Technical Summary

Problems solved by technology

[0003] In the existing process of producing low-carbon aluminum-containing cold heading steel, it is necessary to measure the oxygen content of molten steel twice. One is to determine the oxygen at the end of converter smelting, and calculate the amount of deoxidizer added according to the oxygen content, which will increase the cost of the oxygen determination probe at the end. ; Second, after the molten steel enters the station, the aluminum wire is fed according to the fixed oxygen value to increase the acid-soluble aluminum, which also increases the cost of the fixed oxygen probe

Images