Safe and efficient steel ladle side-blown spraying powder refining device and method

A powder supply device and powder spraying technology, which is applied in the field of steelmaking, can solve problems such as the blockage of bottom blowing holes and the maintenance difficulty of bottom blowing powder spraying components, and achieve the effects of easy maintenance, shortened refining treatment time, and easy production

Active Publication Date: 2018-03-09
CENT IRON & STEEL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above analysis, the present invention aims to provide a safe and efficient ladle side blowing powder refining device and...

Method used

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  • Safe and efficient steel ladle side-blown spraying powder refining device and method
  • Safe and efficient steel ladle side-blown spraying powder refining device and method
  • Safe and efficient steel ladle side-blown spraying powder refining device and method

Examples

Experimental program
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Effect test

Embodiment 1

[0047] Present embodiment is aimed at 150t ladle, adopts the device of safe, efficient ladle side-blown powder injection refining to spray powder in ladle, as figure 1 As shown, a lining brick 2 is built inside the cladding shell 1 of the ladle, and a lining brick embedded with a steel pipe with an air chamber at a distance of 800 mm from the bottom L of the ladle is used as a powder supply device. One end of the powder supply device is connected to the cladding The outside of the shell 1 is connected through the powder supply channel 3, and the powder is blown from the outside of the shell 1 to the inside of the lining brick 2 to supply powder to the inside of the ladle; it is worth noting that the powder supply channel 3 passes between the shell 1 and the lining brick 2 The gap in the cladding 1 passes through, and the position where the powder supply channel 3 passes through the cladding 1 is located on the top of the cladding 1, and its position is higher than the upper sur...

Embodiment 2

[0058] Present embodiment is aimed at 150t ladle, adopts the device of safe, efficient ladle side-blown powder injection refining to spray powder in ladle, as Figure 4 As shown, a lining brick 2 is built inside the cladding shell 1 of the ladle, and 2 lining bricks embedded with a steel pipe with an air chamber at a distance of 800 mm from the bottom L of the ladle are used as powder supply devices to supply air to the inside of the ladle respectively; The two powder supply devices have the same structure, that is, one end of the powder supply device is connected to the outside of the shell 1 through the powder supply channel 3, and the powder is blown from the outside of the shell 1 to the inside of the lining brick 2 to supply powder to the inside of the ladle; it is worth noting Yes, the powder supply passage 3 passes through the cladding 1 through the gap between the cladding 1 and the lining brick 2, and the position where the powder supply passage 3 passes out of the cla...

Embodiment 3

[0070] Present embodiment is aimed at 150t ladle, adopts the device of safe, efficient ladle side-blown powder injection refining to spray powder in ladle, as Figure 7 As shown, a lining brick 2 is built inside the cladding shell 1 of the ladle, and 3 lining bricks embedded with a steel pipe with an air chamber at a distance of 800 mm from the bottom L of the ladle are used as powder supply devices to supply air to the inside of the ladle respectively; The three powder supply devices have the same structure, that is, one end of the powder supply device is connected to the outside of the shell 1 through the powder supply channel 3, and the powder is blown from the outside of the shell 1 to the inside of the lining brick 2 to supply powder to the inside of the ladle; it is worth noting Yes, the powder supply passage 3 passes through the cladding 1 through the gap between the cladding 1 and the lining brick 2, and the position where the powder supply passage 3 passes out of the c...

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Abstract

The invention relates to a safe and efficient steel ladle side-blown spraying powder refining device which is positioned in a steel ladle. Ladle bricks are laid in the steel ladle, the device comprises N powder spraying elements, wherein N is larger than or equal to 1, parts of N powder spraying elements or all N powder spraying elements are embedded into the ladle bricks, one end of each powder spraying element is communicated with the inside of the steel ladle, so that powder is sprayed and blown to the side surface of the steel ladle, the other end of the powder spraying element is connected with an external powder supply device through a powder supply channel, and an inlet end of the external powder supply device is higher than the height of molten steel in the steel ladle. The invention further relates to a safe and efficient steel ladle side-blown spraying powder refining method. A powder spraying unit of the device is simple to operate, high in efficiency and good in metallurgyeffect, and high economic benefits can be directly acquired. Compared with a traditional method that powder is added from the top, the side-blown powder spraying method has the advantages that slag-metal reaction is accelerated, reaction time is short, sulfur is removed, and the removal effects of impurities in steel are good.

Description

technical field [0001] The invention relates to the technical field of steelmaking, in particular to a safe and efficient ladle side blowing powder injection refining device and method. Background technique [0002] The direct alloying technology of manganese ore has the advantages of reducing the consumption of manganese alloys, reducing the cost of steelmaking, and reducing environmental pollution, etc. It is mainly used in the process of converter steelmaking. Based on the pretreatment of hot metal and less slag smelting, Japanese iron and steel enterprises have carried out direct alloying of manganese ore in the converter, and the yield of manganese is stable at about 70%, which can achieve better economic benefits. However, the actual use effect of domestic iron and steel enterprises is not good, and the yield of manganese is between 10% and 60%. Problems such as large amount of slag during alloying, strong oxidation of slag, low manganese yield and instability. There...

Claims

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Application Information

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IPC IPC(8): C21C7/00B22D1/00
Inventor 吴伟胡砚斌王鹏李相臣姚同路梁强林路
Owner CENT IRON & STEEL RES INST
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