CN2391893Y - Double VD vacuum handling means - Google Patents
Double VD vacuum handling means Download PDFInfo
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- CN2391893Y CN2391893Y CN 99239508 CN99239508U CN2391893Y CN 2391893 Y CN2391893 Y CN 2391893Y CN 99239508 CN99239508 CN 99239508 CN 99239508 U CN99239508 U CN 99239508U CN 2391893 Y CN2391893 Y CN 2391893Y
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- vacuum
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- vacuum pump
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- Treatment Of Steel In Its Molten State (AREA)
Abstract
The utility model relates to a double VD vacuum treatment device for molten steel refining treatment, which is characterized in that a main vacuum pump array and an auxiliary vacuum pump array which are led out respectively form a set of vacuum pump simultaneously serve two vacuum tight chambers, wherein one end of a main pump array pipeline and one end of an auxiliary pump array pipeline are respectively connected with the main and the auxiliary vacuum pump arrays; the other end of the main pump array pipeline and the other end of the auxiliary pump array pipeline which are bifurcated pipes are respectively connected with the two vacuum tight chambers in a staggered mode. When the utility model operates, four stop valves (ZF1, ZF2, FF1, FF2) on the main and the auxiliary pump array pipelines are switched; when one vacuum tight chamber is in a low-vacuum state, the other vacuum tight chamber is in a high-vacuum state. The two vacuum tight chambers alternately operate in an overlap mode meet the requirement of the production rhythm of the short process of a converter.
Description
The utility model relates to the liquid steel refining of metallurgy industry to be handled, and refers in particular to the vacuum degasser that is used for converter molten steel.
The converter steel that existing metallurgical works is produced, obnoxious flavour content is generally higher in its molten steel, and for improving the steel inner quality, the converter crude steel must carry out liquid steel refining to be handled.Molten steel face vacuum tank (the liquid level degassing) degassing method (VD) that device is simple, price is more cheap is exactly a kind of common vacuum treatment installation.The VD device is that the ladle that will fill molten steel places that vacuum seal is indoor to be carried out to the refining treatment of molten steel, during work, vacuum pump work makes the vacuum-tight chamber form a vacuum environment, and the ladle bottom feeds the moving molten steel of Ar gas mixing simultaneously, make inclusion floating, remove the obnoxious flavour in the molten steel; But because the molten steel area that exposes in vacuum environment is less, so must under certain vacuum tightness, keep the quite a while can reach degassing target value; The processing rhythm and the cycle that have so just produced the vacuum deaeration refining molten steel of VD device are lacked the contradiction that the flow process rhythm of production is not complementary than the converter of lacking.
The purpose of this utility model is to provide a kind of pair of VD vacuum treatment installation, and it just makes improvements slightly to existing VD device, just can shorten the vacuum-treat cycle of VD device greatly, and the processing rhythm of VD device and the short flow process rhythm of converter are mated mutually.
For achieving the above object, the utility model has designed a kind of pair of VD vacuum treatment installation, the pipeline that comprises the vacuum-tight chamber, vacuum pump, connection vacuum pump and the fly-ash separator that link to each other with fly-ash separator, it is characterized in that: increase a vacuum-tight chamber 6, that is to say that two (A#, B#) vacuum-tight chambers 6 link to each other separately with two (A#, B#) fly-ash separators 5 respectively; Drawing some grades of pumps respectively and form main vacuum pump row 1, auxilliary vacuum pump row 2 in a cover vapour injection vacuum pump, is 6 services of two vacuum-tight chambers simultaneously; The pipeline that connects main and auxiliary vacuum pump row 1,2 and fly-ash separator 5 is the main pump tubulation road 3 and the auxilliary pump tubulation road 4 of Y-pipe structure, main pump tubulation road 3 one ends connect with the 1E pumping hole of main vacuum pump row 1, the other end is the bifurcated pipe that two main stop valves (ZF1, ZF2) is housed, and joins with two (A#, B#) fly-ash separators 5 that are connected two (A#, B#) vacuum-tight chambers 6 respectively; Auxilliary pump tubulation road 4 one ends connect with the 4Eb pumping hole of auxilliary vacuum pump row 2, and the other end is the bifurcated pipe that two auxiliary stop valves (FF1, FF2) is housed, and joins with two (A#, B#) fly-ash separators 5 that are connected two (A#, B#) vacuum-tight chambers 6 respectively.During work, after A# (or B#) vacuum-tight chamber 6 hung in pending ladle, auxilliary vacuum pump row 2 were by auxilliary pump tubulation road 4, can carry out vacuum outgas to ladle and give and take out processing (low vacuum state); Give taking out disposing, A# (or B#) vacuum-tight chamber 6 under the effect of the main vacuum pump row 1 of drawing, is evacuated to working vacuum degree pressurize to giving the molten steel relay that is extracted into the certain vacuum degree by incision main pump tubulation road 3 in the vapour injection vacuum pump.A# (or B#) vacuum-tight chamber 6 is under 1 effect of main vacuum pump row, and when being in vacuum-treat state (high vacuum state), B# (or A#) vacuum-tight chamber 6 can outgas to give to ladle simultaneously and take out processing (low vacuum state) under the effect of auxilliary vacuum pump row 2.So circulation replaces overlapping work, can save time greatly, has satisfied fast pace production, the system high efficiency low consumption.
Alternately switching of the high vacuum of A# (or B#) vacuum-tight chamber 6, rough vacuum working order is to realize by two auxiliary stop valves (FF1, FF2) that are contained in two main stop valves (ZF1, ZF2) on the main pump tubulation road 3 and be contained on the auxilliary pump tubulation road 4.ZF1, FF2 open, and ZF2, FF1 close, and show that A# vacuum-tight chamber 6 is in high vacuum state, and B# vacuum-tight chamber 6 is in low vacuum state; Otherwise ZF1, FF2 close, and ZF2, FF1 open, and show that A# vacuum-tight chamber 6 is in low vacuum state, and B# vacuum-tight chamber 6 is in high vacuum state.
Compare with prior art, the utlity model has following advantage:
1. in a cover vapour injection vacuum pump, draw some grades of pumps respectively
Become main vacuum pump row 1 and auxilliary vacuum pump row 2, be two simultaneously
Vacuum-treat week has been shortened in vacuum-tight chamber's 6 services greatly
Phase.
2. brought into play the maximum potential of a cover vapour injection vacuum pump, reduced
Production cost.
Description of drawings: Fig. 1 is two VD vacuum treatment installation synoptic diagram.
Fig. 2 is that two VD handle table cycle time.
Embodiment:
Certain converter steelmaking factory is original to adopt single VD device that the liquid steel refining that converter molten steel carries out vacuum outgas is handled, and during work, vacuum outgas is handled and is divided into three phases; Fs is a low vacuum state, and pending molten steel is hung in the vacuum-tight chamber 6 times together with ladle, and after the sealing, under the effect of vacuum pump, ladle pressure is extracted into working vacuum degree (0.5 torr), 10 minutes consuming time from normal atmosphere (760 torr); Subordinate phase is a high vacuum state, and ladle keep-uped pressure 20 minutes under working vacuum degree (0.5 torr); Phase III is a vacuum breaker, returns to normal atmosphere (760 torr) state, 2 minutes consuming time; Vacuum outgas was handled accumulative total 32 minutes, surpassed 28 minutes average casting cycle of continuous casting, can not satisfy the rhythm of production of the short flow process of converter.Behind two VD vacuum treatment installations that employing the utility model provides, because the low vacuum state treatment time of fs and the high vacuum state treatment time of subordinate phase can replace overlapping carrying out, practical vacuum is handled only 22 minutes cycle, has satisfied rhythm of production.Concrete operations are as follows: pending molten steel is hung in the A# vacuum-tight chamber 6 times together with the 1# ladle, after the sealing, open FF1, close FF2, this moment, A# vacuum-tight chamber 6 was under auxilliary vacuum pump row 2 effects, be in low vacuum state, ladle pressure is extracted into working vacuum degree (0.5 torr), 10 minutes consuming time from normal atmosphere (760 torr); Open ZF2 simultaneously, close ZF1, with 6 incision main pump tubulation roads 3, B# vacuum-tight chamber, under 1 effect of main vacuum pump row, make B# vacuum-tight chamber 6 be in high vacuum state, carry out relay together with the 2# ladle and be evacuated to the pressurize of working vacuum degree giving the molten steel that is extracted into certain vacuum degree (0.5 torr).So circulation replaces overlapping work, saves time greatly, in only 22 minutes vacuum outgas molten steel refining treatment cycle, has satisfied allegro production requirement.
Claims (2)
1. two VD vacuum treatment installation, comprise the pipeline of the vacuum-tight chamber, vacuum pump, connection vacuum pump and the fly-ash separator that link to each other with fly-ash separator, it is characterized in that: two (A#, B#) vacuum-tight chambers (6) link to each other separately with two (A#, B#) fly-ash separators (5) respectively; Drawing some grades of pumps respectively and form main vacuum pump row (1) and auxilliary vacuum pump row (2) in a cover vapour injection vacuum pump, is two (A#, B#) vacuum-tight chambers (6) services simultaneously; The pipeline that connects vacuum pump (1,2) and fly-ash separator (5) is the main pump tubulation road (3) and the auxilliary pump tubulation road (4) of Y-pipe structure, main pump tubulation road (3) one ends connect with main vacuum pump row (1) 1E pumping hole, the other end is the bifurcated pipe that two main stop valves (ZF1, ZF2) is housed, and joins with two (A#, the B#) fly-ash separators (5) that are connected two (A#, B#) vacuum-tight chambers (6) respectively; Auxilliary pump tubulation road (4) one ends connect with the 4Eb pumping hole that auxilliary vacuum pump is listed as (2), the other end is the bifurcated pipe that two auxiliary stop valves (FF1, FF2) is housed, and joins with two (A#, the B#) fly-ash separators (6) that are connected two (A#, B#) vacuum-tight chambers (6) respectively.
2. a kind of pair of VD vacuum treatment installation according to claim 1 is characterized in that: alternately switching of the high vacuum of two A# (or B#) vacuum-tight chambers (6), rough vacuum working order is to realize by two auxiliary stop valves (FF1, FF2) that are contained in two main stop valves (ZF1, ZF2) on the main pump tubulation road (3) and be contained on the auxilliary pump tubulation road (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99239508 CN2391893Y (en) | 1999-09-01 | 1999-09-01 | Double VD vacuum handling means |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99239508 CN2391893Y (en) | 1999-09-01 | 1999-09-01 | Double VD vacuum handling means |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2391893Y true CN2391893Y (en) | 2000-08-16 |
Family
ID=34026751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99239508 Expired - Fee Related CN2391893Y (en) | 1999-09-01 | 1999-09-01 | Double VD vacuum handling means |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2391893Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101351566B (en) * | 2005-12-29 | 2012-05-30 | 株式会社Posco建设 | Degassing apparatus having duplex vacuum vessel |
| CN102965476A (en) * | 2012-11-30 | 2013-03-13 | 宝钢工程技术集团有限公司 | Electrode rotation double-station electric arc heating vacuum treatment device and using method thereof |
| CN103725827A (en) * | 2013-12-26 | 2014-04-16 | 南阳汉冶特钢有限公司 | Efficient degassing device and process for molded steel production |
-
1999
- 1999-09-01 CN CN 99239508 patent/CN2391893Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101351566B (en) * | 2005-12-29 | 2012-05-30 | 株式会社Posco建设 | Degassing apparatus having duplex vacuum vessel |
| CN102965476A (en) * | 2012-11-30 | 2013-03-13 | 宝钢工程技术集团有限公司 | Electrode rotation double-station electric arc heating vacuum treatment device and using method thereof |
| CN103725827A (en) * | 2013-12-26 | 2014-04-16 | 南阳汉冶特钢有限公司 | Efficient degassing device and process for molded steel production |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |