UA86270C2 - Method for smelting of steel - Google Patents

Abstract

The invention relates to metallurgy. A method for smelting of steel comprises the introduction of ferroalloys into the smelt, at that a ferroalloys are introduced in the smelt inside of U-shaped metal tape, which is compactly closed with perpendicular plane tape. The invention allows for providing of increasing of process efficiency and mechanical properties of metal, improvement of quality and decreasing of steel prime cost.

Description

the amount of introduced deoxidizers and alloying elements decreases, which leads to a decrease in the mechanical properties of steel. In addition, the economic efficiency of the steel smelting process decreases.

The method of steel smelting is carried out in the following way. During complex finishing of steel, deoxidizers and alloying elements are fed into the metal melt inside the O-shaped metal tape, which is tightly closed with a perpendicular flat tape, the thickness and width of which are set depending on the thickness and width of the O-shaped tape bp-b2mm; VpeV'-5mm.

Example

Smelting of steel 09G2S was produced. Complex finishing of steel was carried out by introducing metal melting of ferroalloys with the help of flux-cored wires and in the middle of an O-shaped metal tape, which was tightly closed with a perpendicular flat tape with a different ratio of the thickness and width of the flat and O-shaped tape. The feeding of the O-shaped tape into the metal melt was carried out by the feeding mechanism, which ensured the simultaneous feeding and profiling of the flat tape to the O-shaped form, the feeding of ferroalloys and the flat tape in firm contact with the O-shaped tape. The results of studies of the influence of the method of introduction of ferroalloys on the mechanical properties of steel are presented in the table.

As a result of the conducted research, it was established that the supply of deoxidizers and alloying elements in the middle of the O-shaped metal tape, which is tightly closed by a perpendicular flat tape, the thickness and width of which is set depending on the thickness and width of the O-shaped tape bp-b2mm;

Vp-Vyak5mm is optimal.

The use of the proposed method in comparison with the existing ones provides the following advantages: - piercing the surface layer of the melt with a low temperature of the metal; - supply of deoxidizers and alloying elements into the middle of the metal melt with a high temperature; - strengthening of the process of diffusion of deoxidizers and alloying elements in the molten metal; - uniform distribution of deoxidizers: and alloying elements in the metal melt; - decrease in the amount of oxygen in the metal; - improvement of the mechanical properties of steel due to the strengthening of the deoxidation and alloying process; - increasing productivity, improving quality and reducing the cost of steel production.

The implementation of the proposed method of steel smelting allows to increase the productivity of the process and the mechanical properties of the metal, improve the quality and reduce the cost of steel.

References: 1. Bornatsky I.I., V.F. Mykhnevich, S.A. Yargin Steel production. - M: Metallurgy, 1991. - 400. 2. Boyko V.S., Klymanchuk V.V., Larionov A.A., Shebanyts Z.N., Neboga B.V. Special treatment of steel in

KCC OAHAO MMK named after Yil'ich. - Mariupol: Renata, 2005. - 1636.

Table

Temporary | Border | relative

Method and flow,

Known (closest analogue) 400 280 16 203 29

Offered b-1mm; В-1О0МмМ bp-b1 (2mm) 480 330 20 203 Zo bp-:b3 (4mm) 500 350 21 203 34 bp-b2 (Zmm) 520 380 Zo 203 50 b-1mm

Vp-B4 (14mm) 480 330 20 203 Zo

Vp-Vab (1bmm) 500 350 21 203 34

Vp-Vya5 (15mmMmM 520 380 KO) 203 50