End point controlling process for smelting low carbon steel in electric furnace

Abstract

An end-point control process for smelting low-carbon steel with electric furnace includes proportioning raw materials by controlling C to 1-1.8%, controlling the C / O ratio to 1:2 at 1520 deg.C, 1:1 at 1520-1580 deg.C, and 2:1 at over 1580 deg.C, controlling the typical component of foam slag:CaO / SiO2=2.1-3.0 and FeO (25-30%), and tapping at 1620-1640 deg.C and a[0]=750-900 ppm. Its advantages areshort time and low energy consumption and cost.

Description

Technical field [0001] The invention relates to an end-point control process for smelting low-carbon steel in an electric furnace, in particular to an end-point control process for smelting low-carbon steel with a carbon content below 0.08% and required for hot-rolled steel coils. Background technique [0002] Traditional electric furnace smelting is generally suitable for carbon steel or alloy steel with a carbon content of more than 0.1%, and low-carbon steel with a carbon content of less than 0.08% is usually smelted by a converter process. [0003] When the traditional electric furnace smelts low-carbon steel, it cannot accurately control the oxidation of molten steel, resulting in overoxidation of molten steel, which directly produces the following adverse results: (1) low yield of steel material; (2) high alloy consumption. [0004] The percentages involved in this specification are all percentages by weight. Contents of the invention [0005] The object of the pres...

AI Technical Summary

Problems solved by technology

[0003] When the traditional electric furnace smelts low-carbon steel, because it cannot accurately control the oxidation of molten steel, it causes overoxidation of molten steel, which directly produces the following adverse results: (1) The yield of steel material is low; (2) The consumption of alloy is large