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A device and method for refining molten steel by full bottom blowing ladle

A ladle refining and ladle technology, which is used in manufacturing tools, casting melt containers, casting equipment, etc., can solve problems such as inability to efficiently capture and remove inclusions, inability to stir molten steel well, and lower argon blowing efficiency. The effect of speeding up the production efficiency of enterprises, improving the quality of steel products, and reducing the area of ​​slag holes

Active Publication Date: 2020-05-19
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the process of refining outside the ladle furnace, in order to uniform the chemical composition and temperature of molten steel and promote the floating of inclusions in the steel, argon is usually used to blow the bottom of the ladle, but the conventional bottom blowing argon will cause slag holes under the condition of high flow rate The formation of molten steel causes oxygen and nitrogen elements in the air to cause secondary pollution of molten steel. The distribution of air bubbles in the ladle is too concentrated to efficiently capture and remove inclusions in molten steel

Method used

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  • A device and method for refining molten steel by full bottom blowing ladle
  • A device and method for refining molten steel by full bottom blowing ladle
  • A device and method for refining molten steel by full bottom blowing ladle

Examples

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Embodiment 1

[0029] Such as figure 1 , 2 As shown, the present embodiment provides a device for refining molten steel by blowing a ladle at the bottom, including a ladle 1 for refining molten steel. The ladle 1 includes a ladle wall and a ladle bottom, and the ladle wall is formed by laying bricks 2 of refractory materials The bottom of the ladle is located below the molten steel, and a full-bottom blowing and ventilating element 3 is embedded in the bottom of the ladle. With steel sleeve. A tamping material 4 is filled between the refractory brickwork 2 and the full-bottom blowing and ventilating element 3, and the tamping chamber material 4 makes the position of the full-bottom blowing and ventilating element 3 in the ladle 1 more fixed and will not move.

[0030] The full-bottom air-ventilating element 3 includes a frustum-shaped element body and legs 8, and 16 legs 8 are evenly arranged on the bottom of the element body, sintered with the element body, and formed between the full-bot...

Embodiment 2

[0037] This embodiment adopts as figure 1 The device shown is used for refining molten steel. In this embodiment, a cylindrical full-bottom blowing and ventilating element 3 is embedded in the bottom of the ladle. within the area of ​​81%.

[0038] Such as Figure 4 As shown, the slits 9 on the full-bottom air-ventilating element 3 are arranged in the form of annular seams throughout the full-bottom air-ventilating element 3, and the width of the slits 9 is 0.05mm.

Embodiment 3

[0040] This embodiment adopts as figure 1 The shown device carries out molten steel refining, and the height of supporting leg 8 is 1mm in the present embodiment, and the whole bottom air-blowing element 3 is arranged on the radius of 25% in the area centered on the center of circle at the bottom of the ladle.

[0041] Such as Figure 5 As shown, the slits 9 on the full-bottom air-ventilating element 3 are set in a straight slit pattern and run through the full-bottom air-ventilating element 3, and the width of the slits 9 is 0.1 mm.

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Abstract

The invention belongs to the technical field of steel refining, and in particular relates to a device and method for refining molten steel in a full bottom blowing ladle. The device includes a ladle for refining molten steel. The ladle includes a ladle wall and a ladle bottom. The side walls of the ladle include refractory bricks. The ladle bottom is located below the molten steel and is embedded in the ladle bottom. A full-bottom blowing ventilation element is provided, and the outside of the full-bottom blowing ventilation element is wrapped with a steel sheath. When using this device, argon gas enters the ladle from the bottom of the ladle through the bottom-blown ventilating element. Compared with traditional ventilated bricks, the argon bubbles are dispersed and distributed throughout the entire ladle during the refining process of the ladle, thereby uniformly stirring the molten steel and promoting It homogenizes the composition and temperature of the molten steel, accelerates the slag-gold interface reaction, and can efficiently capture inclusions in the molten steel to achieve the purpose of refining the molten steel without causing secondary pollution of the molten steel.

Description

technical field [0001] The invention belongs to the technical field of iron and steel refining, and in particular relates to a device and method for refining molten steel by full bottom blowing ladle. Background technique [0002] With the development of society, the quality requirements for steel products in the market are getting higher and higher, especially die steel, steel for large machinery, steel for nuclear power and steel for pressure vessels. The steel used in these industries is characterized by strict requirements on the purity of molten steel. This makes iron and steel refining an essential link, among which argon blowing at the bottom of the ladle is widely used in iron and steel refining. [0003] In the process of refining outside the ladle furnace, in order to uniform the chemical composition and temperature of molten steel and promote the floating of inclusions in the steel, argon is usually used to blow the bottom of the ladle, but the conventional botto...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C7/072B22D41/42
Inventor 娄文涛刘壮王贺朱苗勇
Owner NORTHEASTERN UNIV LIAONING
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