CN103352102A - Rotary vacuum degassing device - Google Patents
Rotary vacuum degassing device Download PDFInfo
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- CN103352102A CN103352102A CN2013102839577A CN201310283957A CN103352102A CN 103352102 A CN103352102 A CN 103352102A CN 2013102839577 A CN2013102839577 A CN 2013102839577A CN 201310283957 A CN201310283957 A CN 201310283957A CN 103352102 A CN103352102 A CN 103352102A
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Abstract
The invention provides a rotary vacuum degassing device which comprises a rotary machine body, wherein an axial line of the rotary machine body is inclined 15 degrees to 75 degrees relative to a horizontal plane; the rotary machine body is connected with a driving device and rotates around a shaft core of the rotary machine body under the drive of the driving device; the lower end of the rotary machine body is a lower column, the upper end of the rotary machine body is an upper column, and the middle part of the rotary machine body is a middle column; each column is formed by an integral metal shell in a surrounding way; the inner part of the rotary machine body is an integral refractory material lining formed by pouring; a molten metal discharging passage, a refining chamber and a negative pressure passage are respectively formed in the refractory material linings of the upper column, the middle column and the lower column on a shaft core line of the rotary machine body and are communicated mutually; the discharging passage at the lower end of the rotary machine body is communicated with a refining liquid area through a refining liquid conduit; the negative pressure passage at the upper end is communicated with a vacuum bleed-off passage. The rotary vacuum degassing device can overcome defects existing in conventional vacuum refining equipment outside a furnace.
Description
Technical field
The present invention relates to a kind of molten metal vacuum refining device, specifically a kind of rotation vacuum degassing device.
Background technology
Along with the progress and development of society, people are more and more higher to the performance requriements of steel.This just requires the external refining production of steelmaking process that clean, super clean molten steel can be provided.The vacuum stripping refining is present ideal refinery by de-gassing means.
In numerous vacuum refining devices, the RH vacuum circulating degasser, large with its treatment capacity, refining cycle is short, and refining effect is good, is subject to people's generally approval; Become that everybody generally acknowledges, the most typical vacuum treatment device.And be applied to part Large Steel enterprise.But the intrinsic weakness of this device itself has limited its range of application: 1. pending liquid and the direct mixed flow of finishing metal liquid are difficult to the degassing effect that reaches darker.2. install refractory lining, especially the washing away of soaking tub, burn into thermal shock well damage.Cause the maintenance, repair expense high, and the uncertain factor that impact is produced increase.3. this method must pass to argon gas to upcast, as the circulation power of molten metal.The argon gas that enters vacuum chamber has increased again the burden of bleeding of vacuum pump greatly, and production cost is high.4. the RH equipment mechanism is complicated, and equipment is huge, apparatus expensive not only, and require tall and big factory building supporting with it, gross investment is large.
During present external refining is produced, to the high-cleanness, high of molten metal require and investment working cost and the contradiction between the production cost of refining unit very outstanding.
Summary of the invention
The purpose of this invention is to provide a kind of rotation vacuum degassing device, it can solve the deficiency that the outer vacuum refining device of existing stove exists.
The present invention is achieved through the following technical solutions for achieving the above object: comprise the rotation body, the axis of rotation body is inclined relative to horizontal 15 ゜-75 ゜.The rotation body is connected with drive unit.The rotation body is under the driving of drive unit, around the axle core rotation of rotation body.The lower end of rotation body is lower prop, and the upper end is upper cylinder, and the middle part is middle cylinder.These three cylinders are that a bulk metal shell surrounds three cylinder integral parts that form.Its inside is the holistic refractory lining that is of building shaping.On the shaft core line of rotation body, respectively lower prop, middle cylinder, on molten metal exhaust channel, refining chamber, negative pressure channel are set in the refractory lining of cylinder.This three is interconnected, and the exhaust channel of its lower end is communicated with the refining liquid zone of liquid storage tank by the refining liquid conduit; The negative pressure channel of upper end is connected with the vacuum suction passage.In the lower prop refractory lining, be in the concentric column of radius apart from the axle center certain distance, along the circumferential direction evenly lay 6 axial imbibition passages, every axial imbibition passage respectively by cylinder in the middle of being positioned at separately independently passage communicate with refining chamber.These passages order of connection from bottom to top is: two passages are communicated with at the M point
Axial imbibition passage---imbibition passage radially---spiral reservoir channel---radially reservoir channel---refining chamber.
[in the lower prop] [in middle cylinder] [in the middle cylinder] [in the middle cylinder].
Radially the imbibition passage and radially the angle between the reservoir channel be 90 ゜-180 ゜.Radially the lower end of imbibition passage is positioned at the pending liquid zone of liquid storage tank, below the liquid level of molten metal.The pending liquid zone of liquid storage tank and refining liquid zone form with the baffle plate isolation.Establish a circular hole on the baffle plate, the refining liquid conduit therefrom passes, and the two has appropriate gap, and when guaranteeing to rotate the body rotation, the two does not rub, collides.The double hull external cylindrical surface of lower prop is established the external application flame retardant coating.Make isolation between double hull and the liquid storage tank molten metal, insulation.
The pump-line of sleeve pipe and vacuum pump is connected to an integral body.Pump-line is connected with vacuum air pump, is fixing part.When the rotation body rotates, produce relative circumference between upper cylinder and the sleeve pipe and rotatablely move.Establish the first sealing-ring and the second sealing-ring between upper cylinder and the sleeve pipe.Form cooling water cavity between the first sealing-ring and the second sealing-ring.Establish water coolant access tube and water coolant delivery line on the sleeve pipe between the first sealing-ring and the second sealing-ring, water coolant access tube and water coolant delivery line all are communicated with cooling water cavity.Between the first sealing-ring and the second sealing-ring the 3rd sealing-ring is set, the 3rd sealing-ring is separated into annular intake antrum and annular water chamber with cooling water cavity; The water coolant access tube is communicated with annular intake antrum, and the water coolant delivery line is communicated with annular water chamber.
The lower prop metal casing is double hull, double hull outside surface parcel external application flame retardant coating.Form cooling jacket between the double layer of metal shell of double hull.The first dividing plate and second partition are set in the cooling jacket.The first dividing plate and second partition are separated into cooling jacket for water jacket and backwater chuck.The limbers is all offered in the first dividing plate and second partition lower end, is communicated with by the limbers for water jacket and backwater chuck.Be communicated with annular intake antrum by water-supply pipe for water jacket, the backwater chuck is communicated with annular water chamber by return water pipe.
The whirler body drive has the gear ring that is installed in the external circumference of intermediolateral column, gear ring and driving gear engagement, and driving gear is connected with the output shaft of drive-motor.
The invention has the advantages that: circulating in order of vacuum refinement and molten metal can be combined, make molten metal in vacuum environment, constantly topple over, flow, roll, drip and drench, increased the specific surface area with vacuum contact, make the exposure condition of molten metal under vacuum splendid, can realize the deep purifying of molten metal.The refining process of this device does not re-use argon gas as circulation power, so the burden of bleeding of vacuum pump can significantly reduce; Be conducive to reduce production costs and reduce energy consumption.Simultaneously the present invention has simplified the complexity of equipment, has dwindled equipment volume, and the investment of equipment and the supporting cost of factory building are significantly reduced, and the market range of application of equipment is enlarged.
Description of drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is that A-A analyses and observe the structure for amplifying synoptic diagram among Fig. 1;
Fig. 3 is B-B section structure for amplifying synoptic diagram among Fig. 1;
Fig. 4 is C-C sectional structure synoptic diagram among Fig. 3.
Embodiment
Rotation vacuum degassing device of the present invention comprises rotation body 1,15 °-75 ° of rotation body 1 relative level face tilts, rotation body 1 is connected with the whirler body drive, and under the driving of whirler body drive, rotation body 1 is around the axle core rotation of rotation body 1.Exhaust channel 5 and axial imbibition passage 6 are set in the lower prop 2 of rotation body 1 bottom.The upper cylinder 3 interior negative pressure channels 7 that arrange.Exhaust channel 5 and negative pressure channel 7 all are communicated with refining chamber 4.Axially imbibition passage 6 upper ends are connected with imbibition path 10 one end radially, and radially the other end of imbibition path 10 is connected with spiral reservoir channel 11 at the M point; Spiral reservoir channel 11 passes through radially, and reservoir channel 12 is communicated with refining chamber 4.Exhaust channel 5 and axial imbibition passage 6 lower ends all are positioned at below the metal bath surface of liquid storage tank 8.Negative pressure channel 7 is communicated with vacuum suction pipeline 9.The exhaust channel 5 of lower prop 2 of the present invention and the lower port of axial imbibition passage 6 all are positioned at below the metal bath surface of liquid storage tank 8.This device is arranged on vacuum suction device with upper port (with the Link Port of refining chamber 4) the central point height of exhaust channel 5 and can stablizes the molten metal vacuum suction that reaches highly in the horizontal plane at 40 places when design and installation.Negative pressure during use in the refining chamber 4 by vacuum pump by bleed-off passage 9 realization of outwards bleeding.Negative pressure of vacuum makes the molten metal in the liquid storage tank rise to exhaust channel central position suitable for reading, and stable the maintenance.Along with the rotation of rotation body 1, axially imbibition passage 6, radially imbibition path 10, spiral reservoir channel 11 and radially the level height of reservoir channel 12 constantly change.When imbibition path 10 radially, spiral reservoir channel 11 and radially reservoir channel 12 go to vacuum suction height when following, molten metal is filled with above-mentioned channel space.Along with the rotation of rotation body 1, when M point highly is higher than vacuum suction height, and when being rotated further, the molten metal in this passage is divided into two sections herein, axially imbibition passage 6 and radially the interior molten metal of imbibition path 10 a small amount of backflow is arranged; And spiral reservoir channel 11 and radially the molten metals in the reservoir channel 12 inject in the refining chamber 4.And radially the imbibition path 10 goes to below the vacuum suction elevation plane again, and when being rotated further, radially imbibition path 10 and spiral reservoir channel 11 and radially reservoir channel 12 again be full of molten metal; Namely rotate in body 1 rotary course, molten metal in the interior pending liquid zones 31 of liquid storage tank 8 constantly by axial imbibition passage 6, radially imbibition path 10, spiral reservoir channel 11 and radially reservoir channel 12 enter refining chamber 4, in the vacuum environment of refining chamber 4, obtain refining.The injection of molten metal makes the liquid level rising certain altitude in the refining chamber 4, and this highly is higher than the vacuum suction height that negative pressure of vacuum can be supported; The gravitional force of the raised area molten metal forces the molten metal in the refining chamber 4 to flow back to refining liquid zone 32 in the liquid storage tank 8 by exhaust channel 5.Along with molten metal from refining liquid conduit 29 constantly enter refining liquid zone 32 and axially imbibition passage 6 constantly draw the molten metal of pending liquid zone 31, make the liquid level of pending liquid zone 31 and refining liquid zone 32 that certain difference of altitude arranged; Therefore along with the rotation of rotation body 1, the molten metal in the refining liquid zone 32 can continuously flow in the pending liquid zone 31, realizes circulating in order of molten metal.
The present invention can combine circulating of vacuum stripping refining and molten metal, realizes that molten metal is from the orderly circulation of the pending liquid zone of liquid storage tank → vacuum refinement chamber refining → pending liquid zone of liquid storage tank refining liquid zone → liquid storage tank; Avoid the invalid circulation that causes under the mixed flow situation, thereby improve refining speed and efficient.
This installs peculiar structure and mode of operation, can make molten metal in vacuum environment, constantly topple over, flow, roll, drip and drench, the specific surface area that molten metal is exposed in vacuum environment significantly increases, for institute's gas dissolved in the molten metal deviate to create splendid condition, can realize the deep purifying to molten metal.
The rising power resources of molten metal do not need to use the gases such as argon gas in the rotation of rotation body in the refining process.Compare with prior art (RH device), saved this part cost payout; The burden of bleeding of vacuum pump is significantly reduced simultaneously, is conducive to reduce production costs and energy consumption.
All need certain hour because the suction passage injects and discharges molten metal, the working speed that therefore rotates body is low and stable; Thereby can alleviate molten metal washing away and denude damage the device refractory lining.
Because the vacuum suction height △ h the when density (proportion) of processing object molten metal has determined its vacuum-treat, so this device need not huge volume.Technological operation only need start drive unit just can begin refining production, so the equipment operation is very simple; The equipment structure is greatly simplified; Can significantly reduce the investment of the cost of equipment own and supporting factory building, the market adaptability of equipment is strengthened.
(annotate: for molten steel, △ h is not more than 1.50 meters; And the RH device volume is huge, and take Chinese Baosteel as example, the main part height of its 1#300tRH device has surpassed 12 meters, is 12.35 meters).
The present invention is in order to guarantee to rotate self intensity of body 1, is provided with housing 13 at the outer wall of middle cylinder 38 and upper cylinder 3.Housing 13 does not contact with molten metal, therefore, can adopt the high metallic substance of physical strength to make.
Further scheme provided by the invention is: upper cylinder 3 places in the sleeve pipe 19, and sleeve pipe 19 is connected to an integral body with the pump-line 9 of vacuum pump, between upper cylinder 3 outer walls and sleeve pipe 19 inwalls the first sealing-ring 20 is set, and the second sealing-ring 21.Form cooling water cavity between the first sealing-ring 20 and the second sealing-ring 21.On the sleeve pipe 19 between the first sealing-ring 20 and the second sealing-ring 21 water coolant access tube 22 and water coolant delivery line 23 are set.Water coolant access tube 22 and water coolant delivery line 23 all are communicated with cooling water cavity.This structure can realize that cylinder 3 cooperates with rotary seal between the vacuum suction device sleeve pipe 19, realizes negative pressure channel 7 and the connected sum of vacuum suction pipeline 9 and the isolated sealing of atmospheric environment; Vacuum pump is bled by negative pressure channel 7, keeps the vacuum state in the refining chamber 4.During the work of this device, can water coolant constantly be circulated in the cooling water cavity by water coolant access tube 22 and water coolant delivery line 23, on the one hand the first sealing-ring 20 and the second sealing-ring 21 be played the cooling effect, prevent that sealing-ring high temperature from damaging; Can also form water seal between upper cylinder 3 peripheries and sleeve pipe 19 inwalls on the other hand, the stopping property in the enhancing between cylinder 3 and the sleeve pipe 19 prevents under the condition of negative pressure, has air to enter between upper cylinder 3 and the sleeve pipe 19.
Further scheme provided by the invention is: between the first sealing-ring 20 and the second sealing-ring 21 the 3rd sealing-ring 24 is set.The 3rd sealing-ring 24 is separated into annular intake antrum 25 and annular water chamber 26 with cooling water cavity.Water coolant access tube 22 is communicated with annular intake antrum 25; Water coolant delivery line 23 is communicated with annular water chamber 26.Lower prop 2 housings are set to double hull 14.Double hull 14 is connected to an integral body with housing 13, forms the bulk metal shell of rotation collective 1.Double hull 14 outside surfaces parcel external application flame retardant coating 37.Form cooling jacket between the two-layer housing of double hull 14.The first dividing plate 15 and second partition 16 are set in the cooling jacket.Limbers 36 is all offered in the first dividing plate 15 and second partition 16 lower ends, for being communicated with by limbers 36 between water jacket 17 and the backwater chuck 18.Be communicated with annular intake antrum 25 by water-supply pipe 27 for water jacket 17; Backwater chuck 18 is communicated with annular water chamber 26 by return water pipe 28.This structure can effectively be promoted the intensity of lower prop 2 by double hull 14.Double hull 14 adopts the high metallic substance of intensity to make.The water coolant that circulates in the cooling jacket between the double hull 14 two-layer housings can be lowered the temperature to double hull 14, prevents that double hull 14 from immersing temperature distortion behind the high-temperature liquid metals, causes device to damage.Water coolant enters annular intake antrum 25 through water coolant access tube 22, then enters annular water chamber 26 through water-supply pipe 27, confession water jacket 17, backwater chuck 18 and return water pipe 28 successively, is derived by water coolant delivery line 23.This structure can realize to the sealing-ring cooling water coolant by a jacket water recycle system, in the formation water seal effect, realizes the cooling effect to double hull 14 between upper cylinder 3 and sleeve pipe 19; A plurality of water circulation systems need be set, compact construction, equipment manufacturing cost is cheap.
The present invention can arrange refining liquid conduit 29 at the lower prop 2 of refining liquid exhaust channel 5 for the molten metal that improves the unordered mixed flow of molten metal and cause enters the unequal opportunities situation of vacuum storehouse refining.Refining liquid conduit 29 peripheries arrange baffle plate 30.Baffle plate 30 is separated into pending liquid zone 31 and refining liquid zone 32 with liquid storage tank 8.The finishing metal liquid that exhaust channel 5 is discharged can enter pending liquid zone 31 in refining liquid zone 32 domestic demands through baffle plate 30 tops to be mixed with pending molten metal.This structure can effectively be avoided the unordered mixed flow state of liquid storage tank 8 inner metal liquids, improve finishing metal liquid that RH device downtake discharges and just entered liquid storage tank and just again be promoted in the vacuum storehouse and repeat refining, and get a promotion for no reason at all unbalanced situation of chance of refining of liquid storage tank bottom metal liquid; But Effective Raise refining efficiency and realization deep purifying.
Whirler body drive of the present invention can adopt various structures to realize, wherein preferred interior scheme is as follows: the whirler body drive has the gear ring 33 that is installed in middle cylinder 38 outer wall borders, gear ring 33 and driving gear 34 engagements, driving gear 34 is connected with the output shaft of drive-motor 35.This mechanism have take up room little, the advantage that installing/dismounting is easy to operate.Certain whirler body drive of the present invention also can adopt various structures, for example sprocket wheel can be installed in middle cylinder 38 borders, and sprocket wheel is connected with drive-motor by chain etc.But it is larger that these structures take up room, and the installation and debugging operation is trouble comparatively.
The present invention is for increasing the purifying treatment amount of molten metal, and the lift technique service efficiency can arrange many axial imbibition passages 6 in that lower prop 2 is interior.Every axial imbibition passage 6 is respectively by imbibition path 10 radially independently, spiral reservoir channel 11 and radially reservoir channel 12 be communicated with refining chamber 4.Axially the setting of imbibition passage 6 is relevant with the intensity of geometric space and refractory materials.Intensity and purifying treatment magnitude relation at the balance refractory materials, and concern equipment influence on system operation and production cost factors the work-ing life of considering refractory lining, and through repeatedly actual tests is definite, when the quantity of axial imbibition passage 6 is 6, the most economical, reasonable.
The axle core of rotation body 1 with respect to the horizontal plane between the optimized angle of angle be decided to be 45 °.The angle of no matter rotating angle between body 1 and the horizontal plane is greater than or less than 45 °, and the spatial arrangement of a refining unit and liquid storage tank 8 liquid level all effecteds are unfavorable for the suction of implantation of device and molten metal.
Radially imbibition path 10 of the present invention and radially the angle optimized angle between the reservoir channel 12 be 120 °.
Claims (10)
1. rotation vacuum degassing device, it is characterized in that: comprise rotation body (1), rotation body (1) axis is inclined relative to horizontal 15 °-75 °, rotation body (1) is connected with the whirler body drive, rotation body (1) axle core around rotation body (1) under the driving of whirler body drive rotates, the axial end of rotation body (1) is lower prop (2), the whirler axon is upper cylinder (3) to the other end, the middle part of rotation body (1) is middle cylinder (38), this three part is that a bulk metal shell surrounds three cylinder integral parts that form, the inside of rotation body (1) is unified castable, be holistic refractory lining, on the shaft core line of rotation body (1), respectively in lower prop (2), middle cylinder (38), molten metal exhaust channel (5) is set in the refractory lining of upper cylinder (3), refining chamber (4), negative pressure channel (7), this three is interconnected, the exhaust channel of its lower end (5) is communicated with the refining liquid zone (32) of liquid storage tank (8) by refining liquid conduit (29), and the negative pressure channel of upper end (7) is communicated with vacuum suction passage (9).
2. rotation vacuum degassing device according to claim 1 is characterized in that: upper cylinder (3), the middle cylinder (38) of rotation body (1) are established housing (13).
3. rotation vacuum degassing device according to claim 1, it is characterized in that: upper cylinder (3) places in the sleeve pipe (19), sleeve pipe (19) is connected to an integral body with the pump-line (9) of vacuum pump, between upper cylinder (3) outer wall and sleeve pipe (19) inwall the first sealing-ring (20) and the second sealing-ring (21) are set, form cooling water cavity between the first sealing-ring (20) and the second sealing-ring (21), water coolant access tube (22) and water coolant delivery line (23) are set on the sleeve pipe (19) between the first sealing-ring (20) and the second sealing-ring (21), and water coolant access tube (22) and water coolant delivery line (23) all are communicated with cooling water cavity.
4. rotation vacuum degassing device according to claim 3, it is characterized in that: between the first sealing-ring (20) and the second sealing-ring (21) the 3rd sealing-ring (24) is set, the 3rd sealing-ring (24) is separated into annular intake antrum (25) and annular water chamber (26) with cooling water cavity, water coolant access tube (22) is communicated with annular intake antrum (25), water coolant delivery line (23) is communicated with annular water chamber (26), lower prop (2) housing is made as double hull (14), double hull (14) is connected to an integral body with housing (13), double hull (14) outside surface parcel external application flame retardant coating (37), form cooling jacket between the two-layer housing of double hull (14), the first dividing plate (15) and second partition (16) are set in the cooling jacket, the first dividing plate (15) and second partition (16) are separated into cooling jacket for water jacket (17) and backwater chuck (18), limbers (36) is all offered in the first dividing plate (15) and second partition (16) lower end, for being communicated with by limbers (36) between water jacket (17) and the backwater chuck (18), be communicated with annular intake antrum (25) by water-supply pipe (27) for water jacket (17), backwater chuck (18) is communicated with annular water chamber (26) by return water pipe (28).
5. rotation vacuum degassing device according to claim 1, it is characterized in that: on the lower prop (2) of exhaust channel (5) lower end refining liquid conduit (29) is set, refining liquid conduit (29) periphery arranges baffle plate (30), and baffle plate (30) is separated into pending liquid zone (31) and refining liquid zone (32) with liquid storage tank (8).
6. rotation vacuum degassing device according to claim 1, it is characterized in that: the whirler body drive has the gear ring (33) that is installed in the external wall of whirler border, gear ring (33) and driving gear (34) engagement, driving gear (34) is connected with the output shaft of drive-motor (35).
7. rotation vacuum degassing device according to claim 1, it is characterized in that: lower prop (2) arranges many axial imbibition passages (6), every axial imbibition passage (6) is respectively by imbibition passage (10) radially independently, spiral reservoir channel (11) and radially reservoir channel (12) be communicated with refining chamber (4).
8. rotation vacuum degassing device according to claim 1, it is characterized in that: 6 axial imbibition passages (6) are set in the lower prop (2), every axial imbibition passage (6) respectively by independently radially imbibition passage (10), spiral reservoir channel (11) and radially reservoir channel (12) be communicated with refining chamber (4).
9. according to rotation vacuum degassing device claimed in claim 1, it is characterized in that: 45 ° of the axis relative level face tilts of rotation body (1).
10. rotation vacuum degassing device according to claim 1 is characterized in that: radially imbibition passage (10) and radially the angle between the reservoir channel (12) be 120 °.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310283957.7A CN103352102B (en) | 2013-07-08 | 2013-07-08 | Rotary vacuum degassing device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310283957.7A CN103352102B (en) | 2013-07-08 | 2013-07-08 | Rotary vacuum degassing device |
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| CN103352102A true CN103352102A (en) | 2013-10-16 |
| CN103352102B CN103352102B (en) | 2015-01-28 |
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| CN201310283957.7A Expired - Fee Related CN103352102B (en) | 2013-07-08 | 2013-07-08 | Rotary vacuum degassing device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106480257A (en) * | 2015-08-29 | 2017-03-08 | 党祎贤 | pump valve vacuum degassing device |
| CN109989959A (en) * | 2019-05-07 | 2019-07-09 | 中国科学院地质与地球物理研究所 | A kind of rotary steerable tool hydraulic pressure unit oiling device |
| WO2020063375A1 (en) * | 2018-09-28 | 2020-04-02 | 党祎贤 | Collection ejector vacuum pump |
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| JPH03100116A (en) * | 1989-09-14 | 1991-04-25 | Kawasaki Steel Corp | Apparatus for vacuum degassing-molten metal |
| JP2002030326A (en) * | 2000-07-12 | 2002-01-31 | Ibiden Co Ltd | Vacuum degassing apparatus |
| CN2858663Y (en) * | 2005-07-27 | 2007-01-17 | 东北大学 | Improved circulating molten steel vacuum refining device |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US4599967A (en) * | 1983-11-22 | 1986-07-15 | John M. Henderson And Company Limited | Vessel nozzle cleaning apparatus and methods |
| JPH03100116A (en) * | 1989-09-14 | 1991-04-25 | Kawasaki Steel Corp | Apparatus for vacuum degassing-molten metal |
| JP2002030326A (en) * | 2000-07-12 | 2002-01-31 | Ibiden Co Ltd | Vacuum degassing apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106480257A (en) * | 2015-08-29 | 2017-03-08 | 党祎贤 | pump valve vacuum degassing device |
| WO2017036295A1 (en) * | 2015-08-29 | 2017-03-09 | 党祎贤 | Pump valve vacuum degassing device |
| CN106480257B (en) * | 2015-08-29 | 2018-05-22 | 党祎贤 | Pump valve vacuum degassing device |
| WO2020063375A1 (en) * | 2018-09-28 | 2020-04-02 | 党祎贤 | Collection ejector vacuum pump |
| CN109989959A (en) * | 2019-05-07 | 2019-07-09 | 中国科学院地质与地球物理研究所 | A kind of rotary steerable tool hydraulic pressure unit oiling device |
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| CN103352102B (en) | 2015-01-28 |
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