CN203360491U - RH suction nozzle device for external refining - Google Patents
RH suction nozzle device for external refining Download PDFInfo
- Publication number
- CN203360491U CN203360491U CN 201320423267 CN201320423267U CN203360491U CN 203360491 U CN203360491 U CN 203360491U CN 201320423267 CN201320423267 CN 201320423267 CN 201320423267 U CN201320423267 U CN 201320423267U CN 203360491 U CN203360491 U CN 203360491U
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- Prior art keywords
- suction nozzle
- refining
- molten steel
- gas pipe
- external refining
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- Treatment Of Steel In Its Molten State (AREA)
Abstract
The utility model discloses an RH suction nozzle device for external refining, which reduces splashing molten steel and improves the RH refining efficiency. The device includes an RH suction nozzle and RH lifting gas pipes, and is characterized in that the cross section of the RH suction nozzle is elliptical, the RH suction nozzle is built by refractory material; 9-15 RH lifting gas pipes are mounted in the elliptical RH suction nozzle, and an angle of 0-60 DEG C is formed between each RH lifting gas pipe and the RH suction nozzle. According to the utility model, the dynamic condition of fluid is improved; the cross section of the suction nozzle is enlarged through bettering the shape of the RH suction nozzle, and circulation of molten steel is improved, so that refining time is shortened and refining cost is reduced; better degassing is achieved through improving the circulation of molten steel.
Description
Technical field
The utility model belongs to metallurgical engineering furnace outer refining technology field, particularly a kind of external refining RH nozzle unit.
Background technology
Furnace outer refining technology plays very important effect in metallurgical industry is produced, and furnace outer refining process RH can meet different refining tasks in metallurgical production.The RH technology is widely used in bearing steel, tool steel, and stainless steel, deep drawing steel, in the products such as auto sheet.After adopting RH technique, can improve recovery rate of iron, improve steel product quality, and degassed processing general shortening heat treatment time afterwards, good economic benefit obtained.Producing Clean Steel, ultra low-carbon steel RH technical superiority is outstanding.
In production practice, in RH refining production, the long-pending slag of vacuum chamber is serious, and not only impact is produced, and increases the secondary combustion number of times, the increase production cost.Open (bulletin) number: the CN101070560 of Chinese patent, a kind of RH upcast air supply method and device are disclosed, its device has RH upcast, spray nozzle of the gas supply, its feature is the axis direction of spray nozzle of the gas supply, the direction of blowing is the spray nozzle of the gas supply air blowing direction along RH upcast circumference, the concentric(al) circles formed on projection and its plane of RH upcast axis vertical plane is tangent, make molten steel perpendicular directional line velocity distribution in the RH upcast even, solve molten steel splash problem in the RH vacuum chamber, improved RH upcast work-ing life.Bubble disperse simultaneously is distributed in molten steel, and the bubble ratio surface-area increases, and strengthening is from decarburization, and circulation flow of hot metal increases with the increase of driving gas flow, has greatly improved speed of reaction.Molten steel has formed horizontal velocity in the RH upcast, and after molten steel enters the RH vacuum chamber, around its horizontal direction velocity component drives, molten steel rotates, and reduces dead band molten steel amount in the RH vacuum chamber, improves RH production efficiency.Shortcoming is not obvious in RH vacuum chamber splash improvement, and RH upcast sectional area is too little, and circulating effect is poor aborning.Do not consider the disadvantageous effect of sinuous flow to circulation.
The utility model content
The utility model provides a kind of external refining RH nozzle unit, can reduce the molten steel splash, improves the RH refining efficiency.
A kind of external refining RH nozzle unit, comprise RH suction nozzle and RH lift gas pipe, it is characterized in that RH suction nozzle cross section ovalize, by refractory material laying, formed, RH lift gas pipe is arranged in oval RH suction nozzle, angle between RH lift gas pipe and RH suction nozzle is 0 °-60 °, and RH lift gas pipe is 9-15.
The utility model is compared with existing same device, and its beneficial effect is embodied in:
The utility model, by changing RH lift gas tube angulation, improves RH sinuous flow phenomenon, improves fluid dynamics condition; By improving RH suction nozzle shape, increased the suction nozzle sectional area, improve the molten steel circulation, thereby reduced refining time, reduced the refining cost.By improving the molten steel circulation, can reach better degassed purpose.
The accompanying drawing explanation
Fig. 1 is RH nozzle unit cross-sectional structure schematic diagram for a kind of external refining.
Fig. 2 is RH nozzle unit cross-section illustration intention for a kind of external refining.
Fig. 3 is RH nozzle unit longitudinal cross-section structural representation for a kind of external refining.
Embodiment
As Figure 1-3, a kind of external refining RH nozzle unit, by RH suction nozzle 2 and RH lift gas pipe 1, formed, RH suction nozzle 2 cross section ovalizes, by refractory material laying, formed, RH lift gas pipe 1 is arranged in oval RH suction nozzle 2, and the angle between RH lift gas pipe 1 and RH suction nozzle 2 is 35 °, and RH lift gas pipe 1 is 9-15.
Claims (1)
1. an external refining RH nozzle unit, comprise RH suction nozzle and RH lift gas pipe, it is characterized in that RH suction nozzle cross section ovalize, by refractory material laying, formed, RH lift gas pipe is arranged in oval RH suction nozzle, angle between RH lift gas pipe and RH suction nozzle is 0 °-60 °, and RH lift gas pipe is 9-15.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320423267 CN203360491U (en) | 2013-07-16 | 2013-07-16 | RH suction nozzle device for external refining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320423267 CN203360491U (en) | 2013-07-16 | 2013-07-16 | RH suction nozzle device for external refining |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203360491U true CN203360491U (en) | 2013-12-25 |
Family
ID=49808283
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320423267 Expired - Fee Related CN203360491U (en) | 2013-07-16 | 2013-07-16 | RH suction nozzle device for external refining |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203360491U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105256106A (en) * | 2015-11-20 | 2016-01-20 | 山东钢铁股份有限公司 | RH refining device |
-
2013
- 2013-07-16 CN CN 201320423267 patent/CN203360491U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105256106A (en) * | 2015-11-20 | 2016-01-20 | 山东钢铁股份有限公司 | RH refining device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131225 Termination date: 20140716 |
|
| EXPY | Termination of patent right or utility model |