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Molten steel alloying device adopting rotary injection of powder, and alloying method

A technology of molten steel alloying and rotary injection, which is applied in the field of iron and steel metallurgy, can solve the problems of large temperature drop of molten steel during melting time, long alloying time, and low alloy yield, so as to improve alloy yield and uniformity The effect of high and less alloying temperature drop

Active Publication Date: 2017-10-20
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this method just adopts the injection pipe with stirring head and cooling pipe to blow the alloy and basic mold slag into molten steel for alloying. And the injection is carried out at the same point, the alloy yield is low; and due to the large alloy particle size and long melting time, it is easy to cause the disadvantages of large temperature drop of molten steel and long alloying time.

Method used

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  • Molten steel alloying device adopting rotary injection of powder, and alloying method
  • Molten steel alloying device adopting rotary injection of powder, and alloying method

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Adopt the present invention to carry out alloying test, and the maximum diameter of anti-splashing device 2 is 110% of the outer diameter of tank mouth of molten steel tank 5, and the refractory material wrapped on the outside of powder spray gun 7 has a length of refractory material that is 1 / 2 of the total length of the powder spray gun; The injection system 8 sprays nitrogen with a purity of more than 99.9% and a pressure of 0.4 MPa into the molten steel through the powder spray gun 7, and at the same time opens the elevator 9 to lower the powder spray gun 7 of the externally wrapped refractory material to 400 mm from the bottom of the molten steel tank 5. When the powder spray gun 7 reaches the working position, the rotating device 4 is turned on, and the rotation speed is 10 rpm. At the same time, the feeding system 3 is started to spray the total amount of alloy to be added into the molten steel through the powder spray gun 7. The alloy particle size 0.09mm, adjust...

Embodiment 2

[0028]Adopt the present invention to carry out alloying test, and the maximum diameter of anti-splashing device 2 is 120% of the outer diameter of tank mouth of molten steel tank 5, and the refractory material of dust spray gun 7 external wrapping is 2 / 3 of the total length of powder spray gun; The injection system 8 sprays nitrogen with a purity of more than 99.9% and a pressure of 0.5 MPa into the molten steel through the powder spray gun 7, and at the same time opens the elevator 9 to lower the externally wrapped refractory material powder spray gun 7 to 450 mm from the bottom of the molten steel tank 5. When the powder spray gun 7 reaches the working position, turn on the rotating device 4, the rotation speed is 20 rpm, and start the feeding system 3 at the same time to spray the total amount of alloy that needs to be added into the molten steel through the powder spray gun 7, and the alloy particle size 0.106mm, adjust the injection system 8 to adjust the pressure to the w...

Embodiment 3

[0030] Adopt the present invention to carry out alloying test, the maximum diameter of anti-splashing device 2 is 130% of the outer diameter of tank mouth of molten steel tank 5, and the outer wrapping refractory material of powder spraying gun 7 has the length of refractory material being 2 / 3 of the total length of powder spraying gun; Injection system 8 sprays nitrogen with a purity of more than 99.9% and a pressure of 0.6 MPa into the molten steel through the powder spray gun 7, and at the same time opens the elevator 9 to lower the externally wrapped refractory material powder spray gun 7 to 500 mm from the bottom of the molten steel tank 5. When the powder spray gun 7 reaches the working position, turn on the rotating device 4, the rotation speed is 30 rpm, and start the feeding system 3 at the same time to spray the total amount of alloy that needs to be added into the molten steel through the powder spray gun 7, and the alloy particle size 0.125mm, adjust the injection s...

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PUM

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Abstract

The invention discloses a molten steel alloying device adopting rotary injection of powder, and an alloying method. According to the molten steel alloying device adopting rotary injection of powder, multipoint simultaneous alloying can be achieved by using an inverted T-shaped powder gun; the rotary injection alloy powder method is used for alloying, the alloying temperature can be reduced, and the alloying time is shortened; the alloy yield is improved effectively, and the alloy elements after alloying are high in uniformity; a feeding system and an injection system can be controlled automatically and adjusted on line; and the powder gun is prevented from being blocked effectively, and automatic deslagging of the powder gun can be achieved.

Description

technical field [0001] The invention relates to the field of iron and steel metallurgy, in particular to a molten steel alloying device and alloying method for rotary spraying powder. Background technique [0002] By adding elements, the metal becomes (under certain process conditions) an alloy with expected properties. In order to ensure the various physical and chemical properties of the steel, alloy additives are added to the steel to adjust its composition to the specified range. Those elements (C, Si, Mn, S or P) that are not present in ordinary steel or have a small content are all alloying elements. Alloy additives can be pure materials (nickel, copper, aluminum, graphite powder, etc.), iron alloys (ferromanganese, ferrosilicon, vanadium, ferrochrome, etc.), or compounds of alloying elements (oxides, carbides, etc.) substances, nitrides, etc.). In steelmaking production, deoxidation and alloying are generally carried out almost at the same time, and sometimes it is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/00
CPCC21C7/0006
Inventor 唐复平曹东廖相巍万雪峰任子平李广帮张晓光赵亮贾吉祥
Owner ANGANG STEEL CO LTD
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