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Dispersion type integral steel ladle bottom blowing air brick as well as forming process and application method thereof

A kind of breathable brick and integral technology, which is applied in the direction of manufacturing tools, metal processing equipment, casting molten material containers, etc., can solve the problems of low service life, uneven ventilation, and small air flow of diffused breathable bricks, and achieve the improvement of inclusions Removal rate, effect of reducing crack problems

Pending Publication Date: 2021-07-16
SHANDONG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a diffused integral ladle bottom blowing ventilation brick and its forming process and application method, by increasing the venting area of ​​the diffused venting part, improving the structure and molding process of the diffused venting part , The application method of the innovative ladle bottom blowing air brick solves the industry problems of small air flow, uneven air ventilation and low service life of the diffused air brick. The total oxygen content in the material is reduced by more than 1.7ppm year-on-year, and the oxygen-burning cleaning time of the breathable brick is reduced by more than 10s year-on-year

Method used

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  • Dispersion type integral steel ladle bottom blowing air brick as well as forming process and application method thereof
  • Dispersion type integral steel ladle bottom blowing air brick as well as forming process and application method thereof
  • Dispersion type integral steel ladle bottom blowing air brick as well as forming process and application method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A kind of diffuse type integral ladle bottom blowing breathable brick, such as Figure 1-Figure 4 As shown, it includes the ladle bottom blowing vent brick body 1, diffuse venting plug 2, protective body 3, steel shell 4, upper air chamber 5, safety warning device 6, slit air passage 7, lower air chamber 8, and bottom cover plate 9. The air intake pipe 10, the lower part of the diffusion-type venting plug 2 is positioned in the positioning groove 12 on the upper part of the safety warning device 6, and the safety warning device 6 is provided with a plurality of slits arranged in a circular cross-section and "eight" in the longitudinal section The air passage 7, the upper end of the slit air passage 7 communicates with the upper air chamber 5, the lower end of the slit air passage 7 communicates with the lower air chamber 8, and the periphery of the diffusion type ventilation plug 2 and the safety warning device 6 is provided with a protective body 3, The outer surface o...

Embodiment 2

[0061] As described in Example 1, the diffuse type integral ladle bottom blowing air brick is different in that:

[0062] The diffusion-type ventilation plug 2 is in the shape of a truncated cone as a whole, the diameter d1 of the upper bottom is 110 mm, and the diameter d2 of the lower bottom is 130 mm. The height h1 of the diffusion-type ventilation plug 2 used for the new working lining of the ladle and the repairing working lining is different, wherein The height h11 for the new working lining of the ladle is 520mm, and the height h12 for the repairing working lining of the ladle is 470mm.

[0063] The safety warning device 6 is in the shape of a truncated cone as a whole, the diameter of the upper bottom ¢1 is 155 mm, the diameter of the lower bottom ¢2 is 185 mm, and the height h2 is 130 mm.

[0064] The upper air chamber 5 is cylindrical, the diameter d of the bottom surface is 115mm, and the height of the cylinder is set according to the required air flow.

[0065] Th...

Embodiment 3

[0077] As described in Example 1, the diffuse type integral ladle bottom blowing air brick is different in that:

[0078] The diffusion-type ventilation plug 2 is in the shape of a truncated cone as a whole, the diameter d1 of the upper bottom is 120 mm, and the diameter d2 of the lower bottom is 140 mm. The height h1 of the diffusion-type ventilation plug 2 used for the new working lining of the ladle and the repairing working lining is different, wherein The height h11 for the new working lining of the ladle is 530mm, and the height h12 for the working lining of the ladle repair is 480mm.

[0079] The safety warning device 6 is in the shape of a truncated cone as a whole, the diameter of the upper bottom ¢1 is 165 mm, the diameter of the lower bottom ¢2 is 195 mm, and the height h2 is 150 mm.

[0080] The upper air chamber 5 is cylindrical, the diameter d of the bottom surface is 120mm, and the height of the cylinder is set according to the required air flow.

[0081] The l...

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Abstract

The invention relates to a dispersion type integral steel ladle bottom blowing air brick and a forming process and application method thereof. The dispersion type integral steel ladle bottom blowing air brick comprises a steel ladle bottom blowing air brick body, a dispersion type vent plug, a protection body, a steel shell, an upper air chamber, a safety warning device, a slit air channel, a lower air chamber, a bottom cover plate and an air inlet pipe. By increasing the ventilation area of a dispersion type ventilation part, improving the structure and the forming process of the dispersion type ventilation part and innovating the application method of the steel ladle bottom blowing air brick, the industrial problems that the dispersion type ventilation brick is small in ventilation volume, uneven in ventilation and short in service life are solved; and compared with an air brick with the long service life and the high blow-through rate disclosed by the patent with the application patent number of 201420093492.9, the service life of the air brick with the long service life and the high blow-through rate is prolonged by more than 4 heat times on year-on-year basis, the total oxygen content in a finished product is reduced by 1.7 ppm or more on year-on-year basis, and the oxygen burning cleaning time of the air brick is reduced by 10 seconds or more on year-on-year basis.

Description

technical field [0001] The invention relates to a diffuse type integral ladle bottom blowing air brick and its molding process and application method, belonging to the technical field of metallurgical refractory materials. Background technique [0002] Ladle bottom argon blowing is a simple and efficient out-of-furnace refining technology, which can even out the composition and temperature of molten steel, and promote the physical and chemical reactions of molten steel refining and the floating and removal of inclusions. It is widely used at home and abroad. The permeable brick is the most critical functional element of argon blowing at the bottom of the ladle. It mainly has two structural types: diffuse type and slit type. The slit type permeable brick has the advantages of large ventilation, good mixing effect and long service life, and is widely used. In order to improve the metallurgical effect of ladle bottom blowing to remove inclusions, in recent years, the dispersion...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D41/02B22D41/58C21C7/072
CPCB22D41/02B22D41/58C21C7/072
Inventor 武光君杜鹏于辉王忠刚陈良林敏
Owner SHANDONG IRON & STEEL CO LTD
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