CN100448568C - Incorporated manufacturing technique for vacuum steel ladle degassing and vacuum casting a plurality of steel ingots - Google Patents
Incorporated manufacturing technique for vacuum steel ladle degassing and vacuum casting a plurality of steel ingots Download PDFInfo
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- CN100448568C CN100448568C CNB200710067287XA CN200710067287A CN100448568C CN 100448568 C CN100448568 C CN 100448568C CN B200710067287X A CNB200710067287X A CN B200710067287XA CN 200710067287 A CN200710067287 A CN 200710067287A CN 100448568 C CN100448568 C CN 100448568C
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Abstract
The invention relates to a method for integrally producing vacuum steel pack degassing and vacuum irrigation multiple steel ingots, for avoiding secondary oxidization, middle pack flameproof material, and steel water pollution. The invention at one time arranges steel water pack and steel ingot on a vacuum pot formed by upper and lower pots and a vacuum pot cover, wherein the multiple steel ingots are swinging arranged on a rotary ingot disc. And the invention first processes VD degassing method, irrigates and feeds when the sliding water opening is toward to the ingot mould, closes water opening and rotates ingot disc, irrigates towards to the next ingot mould till needed number are completed. The invention can directly irrigate degassed steel water into multiple steel ingots, without secondary oxidization and pollution.
Description
Technical field
The invention belongs to molten steel vacuum external refining field in steel-making, the ingot casting technology, be specifically related in the vacuum ladle degassing method Argon and stir vacuum casting method in ladle degassing method and the vacuum steel stream degassing method, the integral manufacturing technique of a kind of vacuum ladle degassing and many steel ingots of vacuum casting.
Background technology
Existing molten steel die casting mostly is to carry out in atmosphere, and casts in the atmosphere, causes secondary oxidation easily, generates a large amount of field trashes, absorbs H, N gas, and molten steel pollutes more serious, influences the quality of molten steel.
In order to solve the above problems, mainly adopted following two kinds of methods:
1, vacuum casting method
The method is: the steel ladle through external refining is at first injected molten steel in the tundish above being arranged on vacuum tank in atmosphere, when the tundish molten steel reach a certain height, open the tundish stopper rod, the steel flow thigh waters out the sealing sheet metal, fall in the interior ingot mould of vacuum tank, when the steel flow thigh falls, be subjected to vacuum action, gas [H] etc. is acutely emitted in the stream strand, carbon and oxygen will generate also that the carbon monoxide gas bubble is strong emits in the molten steel, make the stream strand certain angle of flare of one-tenth spray into the molten steel drippage down, degasifying effect is very good, can not produce " secondary oxidation ".But it is to carry out in atmosphere that ladle molten steel pours into the tundish process, inevitable " secondary oxidation ", and the unstable oxide in ladle brick, stopper rod sleeve brick and the stopper brick also can cause molten steel " secondary oxidation " in the tundish in addition.Also have refractory material chemistry and mechanical erosion also to bring field trash to molten steel, the tundish covering slag also may be involved in molten steel and bring field trash.And bag or several Baogangs water large steel ingot of can only casting.
2, " ladle-to-ladle and vacuum-casting duplex practice " reaches " car casting in the vacuum tank " in the vacuum-casting method
The method is: ladle tundish in vacuum tank pours into molten steel; water Cheng Yizhi or many steel ingots by tundish vacuum downhill casting again; prevented that steel flow from contacting " secondary oxidation " that produces with atmosphere; but field trash and anti-material that tundish cylinder-packing, stopper rod sleeve brick and stopper brick still will cause " secondary oxidation " to bring corrode the field trash that brings; the tundish covering slag also may be involved in molten steel, brings field trash.
Summary of the invention
Technical problem to be solved by this invention provide a kind of technological design rationally, solved prior art defective, cancelled tundish and covering slag, with LF ladle and Duo Zhi ingot mould with placing harm, the steel gas of outgased and cast, eliminated in the vacuum tank " secondary oxidation " and various field trash is few, ingot quality is high, the vacuum ladle degassing that can a casting multi-branch steel ingot and the integral manufacturing technique of many steel ingots of vacuum casting.
The integral manufacturing technique that the technical scheme that is provided is this vacuum ladle degassing and many steel ingots of vacuum casting is provided in the present invention, and its processing step is:
A, the wharve (9) of ingot mould in lower tank (8) is upward in place;
B, upper tank body (3) is reached lower tank (8) top with upper tank body elevating translational car, when upper tank body (3) during with lower tank (8) contraposition, upper tank body (3) falls, and finishes the in place of upper tank body (3);
C, the LF ladle (2) that will have a molten steel hang in ladle seat (12) in the upper tank body (3) and go up in placely, connect combination snap joint (4), and beginning is blown into argon gas and stirs in molten steel;
D, vacuum container cover (1) rotated to fall after upper tank body (3) top aligns, LF ladle (2) and ingot mould are sealed to a vacuum tank by upper tank body (3), lower tank (8) and vacuum container cover (1), vacuumize by vacuum pipe (11), watch interior molten steel boiling situation of LF ladle (2) and vacuum meter reading by peep hole, control vacuum and Argon amount are controlled degasification process, when vacuum reaches 67Pa, kept 15 minutes;
After e, LF ladle (2) degassing finish, continue to keep vacuum, open slide gate nozzle (6), emit a little molten steel in the LF ladle (2), after going out in ladle nozzle brick and slide gate nozzle (6) the upper slide hole in the little slag ladle of solid filler to, close slide gate nozzle (6), and open the confession argon valve of air brick on slide gate nozzle (6) lower skateboard simultaneously, Argon stirs in LF ladle (2);
F, start rotating mechanism (10), make first group of ingot mould aim at slide gate nozzle (6), open slide gate nozzle (6), by the technological requirement time ingot body and cap notch portion are cast and feeding, after first group of ingot mould watered, close slide gate nozzle (6), start rotating mechanism (10), make second group of ingot mould aim at slide gate nozzle (6), open slide gate nozzle (6), casting method according to first group of ingot mould is cast, meanwhile, first group of ingot mould just in time aimed at ingot head opening exothermic mixture adding apparatus (5), starts the cap notch portion adding exothermic mixture of feeder to first group of ingot mould, according to this operating process several groups of ingot moulds in back cast, feeding and adding exothermic mixture;
G, last group ingot mould casting, feeding and add exothermic mixture after, stop Argon, inflated with nitrogen in vacuum tank, vacuum breaker, rise and the vacuum container cover of outwarding winding (1), open argon gas, the snap joint of hydraulic line and cooling water (4), hang away LF ladle (2) with overhead traveling crane, when promoting and removing upper tank body (3), manually every ingot head opening partly being added one bag of carbonization rice husk immediately is incubated, after the cooling, will hang with the ingot mould of red ingot and hot top successively with overhead traveling crane and to specify the place to stand to put, be cooled to the stipulated time, take off ingot then, red ingot heat is sent heating furnace, clears up lower tank (8) and wharve (9) at last, has finished the production process of the degassing of vacuum ladle and many steel ingots of vacuum casting.
The present invention compares with prior art and has the following advantages and effect: 1, the process of the whole vacuum ladle degassing and many steel ingots of vacuum casting is carried out in same vacuum tank, has prevented the secondary oxidation that air brings fully.2, compared with existing several vacuum-casting methods, the present invention has saved the time of the middle handling of ladle, has reduced cooling.Alleviated the activity duration of casting aisle overhead traveling crane, the scheduling of convenient workshop.3, in the technical process of the present invention; do not use tundish; except when vacuum outgas is handled, contacting the pollution of a small amount of refractory material with cylinder-packing, mouth of a river refractory material; lack the pollution that tundish cylinder-packing, stopper rod sleeve brick, stopper brick, nozzle brick and tundish covering slag are brought than prior art, can produce field trash, the minimum clean steel of gas content.4, one heat steel water can pour into the clean steel steel ingot of many different tonnages, can satisfy and forge or rolling needs, produces noble and unsullied clean steel stocking or forges material.
Description of drawings
Fig. 1 is the structural representation of device therefor of the present invention.
The specific embodiment
The present invention is described in further detail below in conjunction with embodiment, and following examples are explanation of the invention and the present invention is not limited to following examples.
Embodiment:
As shown in Figures 1 to 3, the device name of present embodiment is vacuum tank 13, vacuum container cover 1, LF ladle 2, upper tank body 3, combined type snap joint 4, exothermic mixture adding apparatus 5, slide gate nozzle 6, lower tank 8, wharve 9, rotating mechanism 10, vacuum suction pipeline 11, ladle seat 12;
Tonnage and other technological requirements according to required steel ingot, the preparation internal diameter is that 6 meters lower tank 8 and internal diameter is 6 meters, the upper tank body 3 that local internal diameter is 3.8 meters, be provided with rotating mechanism 10 and wharve 9 in the lower tank 8, in place on the wharve 9 of ingot mould in lower tank 8 that the direct casting of 10 3t is used, upper tank body 3 usefulness upper tank body lift trucks are reached lower tank 8 tops, when the contraposition of upper tank body 3 and lower tank 8, upper tank body 3 falls, combine with lower tank 8 sealings, finish the in place of upper tank body 3, the LF ladle 2 that will have a molten steel hangs on the ladle seat 12 in the upper tank body 3 in place, connect combined type snap joint 4, beginning is blown into argon gas and stirs in molten steel, the Argon amount does not expose the top of the slag with molten steel and is advisable; Vacuum container cover 1 rotated to fall after upper tank body 3 tops align, LF ladle 2 and ingot mould are by upper tank body 3, lower tank 8 and vacuum container cover 1 are sealed to a vacuum tank, vacuumize by vacuum suction pipeline 11, watch molten steel boiling situation and vacuum meter reading in the LF ladle 2 by peep hole, control degasification process with control vacuum and Argon amount, when vacuum reaches the 67Pa left and right sides, kept about 15 minutes, finish vacuum outgas, continue to keep vacuum, open slide gate nozzle 6, emit a little molten steel in the LF ladle 2, go out in ladle nozzle brick and the upper slide hole solid filler in the little slag cylinder of an appointment after, close slide gate nozzle 6, and open simultaneously air brick on slide gate nozzle 6 lower skateboards for the argon valve, Argon stirs in LF ladle 2; Start rotating mechanism 10, make first group of ingot mould aim at slide gate nozzle 6, opening slide gate nozzle 6 cast and feeding to ingot body and cap notch portion by the technological requirement time, after first group of ingot mould watered, close slide gate nozzle 6, start rotating mechanism 10, make second group of ingot mould aim at slide gate nozzle 6, open slide gate nozzle 6, casting method according to first group of ingot mould is cast, and meanwhile, first group of ingot mould just in time aimed at ingot head opening exothermic mixture adding apparatus 5, start the cap notch portion adding exothermic mixture of feeder, several groups of ingot moulds in back are cast according to this operating process to first group of ingot mould, feeding and adding exothermic mixture; Last group ingot mould casting, feeding and add exothermic mixture after, stop Argon, inflated with nitrogen in vacuum tank, vacuum breaker, rise and the vacuum container cover 1 of outwarding winding, open argon gas, the snap joint 4 of hydraulic line and cooling water is hung away LF ladle 2 with overhead traveling crane, promote and remove upper tank body 3 again, manually every ingot head opening is partly added one bag of carbonization rice husk immediately and be incubated, after cooling a period of time, will hang with the ingot mould of red ingot and hot top successively with overhead traveling crane and to specify the place to stand to put, must not tilt and keep flat during handling, after being cooled to the stipulated time, can take off ingot, the red heating furnace that send, clear up lower tank 8 and wharve 9 at last, treat down stove production.Finished the production process of the degassing of vacuum ladle and many steel ingots of vacuum casting.
According to the practical situations in the engineering, can design two or more mouths of a river in order to reduce the used time of casting.
Claims (1)
1, the integral manufacturing technique of a kind of vacuum ladle degassing and many steel ingots of vacuum casting, it is characterized in that: processing step is followed successively by:
A, the wharve (9) of ingot mould in lower tank (8) is upward in place;
B, upper tank body (3) is reached lower tank (8) top with upper tank body elevating translational car, when upper tank body (3) during with lower tank (8) contraposition, upper tank body (3) falls, and finishes the in place of upper tank body (3);
C, the LF ladle (2) that will have a molten steel hang in ladle seat (12) in the upper tank body (3) and go up in placely, connect combination snap joint (4), and beginning is blown into argon gas and stirs in molten steel;
D, vacuum container cover (1) rotated to fall after upper tank body (3) top aligns, LF ladle (2) and ingot mould are sealed to a vacuum tank by upper tank body (3), lower tank (8) and vacuum container cover (1), vacuumize by vacuum pipe (11), watch interior molten steel boiling situation of LF ladle (2) and vacuum meter reading by peep hole, control vacuum and Argon amount are controlled degasification process, when vacuum reaches 67Pa, kept 15 minutes;
After e, LF ladle (2) degassing finish, continue to keep vacuum, open slide gate nozzle (6), emit a little molten steel in the LF ladle (2), after going out in ladle nozzle brick and slide gate nozzle (6) the upper slide hole in the little slag ladle of solid filler to, close slide gate nozzle (6), and open the confession argon valve of air brick on slide gate nozzle (6) lower skateboard simultaneously, Argon stirs in LF ladle (2);
F, start rotating mechanism (10), make first group of ingot mould aim at slide gate nozzle (6), open slide gate nozzle (6), by the technological requirement time ingot body and cap notch portion are cast and feeding, after first group of ingot mould watered, close slide gate nozzle (6), start rotating mechanism (10), make second group of ingot mould aim at slide gate nozzle (6), open slide gate nozzle (6), casting method according to first group of ingot mould is cast, meanwhile, first group of ingot mould just in time aimed at ingot head opening exothermic mixture adding apparatus (5), starts the cap notch portion adding exothermic mixture of feeder to first group of ingot mould, according to this operating process several groups of ingot moulds in back cast, feeding and adding exothermic mixture;
G, last group ingot mould casting, feeding and add exothermic mixture after, stop Argon, inflated with nitrogen in vacuum tank, vacuum breaker, rise and the vacuum container cover of outwarding winding (1), open argon gas, the snap joint of hydraulic line and cooling water (4), hang away LF ladle (2) with overhead traveling crane, when promoting and removing upper tank body (3), manually every ingot head opening partly being added one bag of carbonization rice husk immediately is incubated, after the cooling, will hang with the ingot mould of red ingot and hot top successively with overhead traveling crane and to specify the place to stand to put, be cooled to the stipulated time, take off ingot then, red ingot heat is sent heating furnace, clears up lower tank (8) and wharve (9) at last, has finished the production process of the degassing of vacuum ladle and many steel ingots of vacuum casting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200710067287XA CN100448568C (en) | 2007-02-15 | 2007-02-15 | Incorporated manufacturing technique for vacuum steel ladle degassing and vacuum casting a plurality of steel ingots |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB200710067287XA CN100448568C (en) | 2007-02-15 | 2007-02-15 | Incorporated manufacturing technique for vacuum steel ladle degassing and vacuum casting a plurality of steel ingots |
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| CN101015853A CN101015853A (en) | 2007-08-15 |
| CN100448568C true CN100448568C (en) | 2009-01-07 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101342586B (en) * | 2007-10-22 | 2015-04-22 | 冬燕 | Equipment and process for casting multi-branch steel ingot with vacuum spill method and liquid steel |
| CN102699284B (en) * | 2012-05-21 | 2014-08-06 | 杭州中强轧辊有限公司 | Rapid casting process of rollers by common method |
| CN108723348B (en) * | 2018-06-11 | 2020-10-16 | 江苏集萃先进金属材料研究所有限公司 | Method for improving bottom scouring of vacuum induction melting ingot mold |
| CN110926212A (en) * | 2019-12-18 | 2020-03-27 | 西安聚能高温合金材料科技有限公司 | Device and method for adding heat insulation material to vacuum induction cast ingot in vacuum environment |
| CN112157253B (en) * | 2020-09-25 | 2022-02-01 | 三明学院 | Whole-process non-oxidation protection casting device and casting method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1405167A (en) * | 1972-06-07 | 1975-09-03 | Heppenstall Co | Prevention of shrinkage cavities and voids in metal ingots |
| GB1454213A (en) * | 1973-11-02 | 1976-11-03 | Krupp Ag Huettenwerke | Sealing device for a casting ladle |
| JPS5645263A (en) * | 1979-09-17 | 1981-04-24 | Hitachi Ltd | Ladle for casting |
| JPS5762856A (en) * | 1980-09-01 | 1982-04-16 | Shinagawa Refract Co Ltd | Method for preventing impact of molten steel flow upon ladle contained in vacuum chamber |
| JPH10287914A (en) * | 1997-04-16 | 1998-10-27 | Nippon Steel Corp | Method for preventing deformation of steel shell in rh vacuum degassing furnace |
-
2007
- 2007-02-15 CN CNB200710067287XA patent/CN100448568C/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1405167A (en) * | 1972-06-07 | 1975-09-03 | Heppenstall Co | Prevention of shrinkage cavities and voids in metal ingots |
| GB1454213A (en) * | 1973-11-02 | 1976-11-03 | Krupp Ag Huettenwerke | Sealing device for a casting ladle |
| JPS5645263A (en) * | 1979-09-17 | 1981-04-24 | Hitachi Ltd | Ladle for casting |
| JPS5762856A (en) * | 1980-09-01 | 1982-04-16 | Shinagawa Refract Co Ltd | Method for preventing impact of molten steel flow upon ladle contained in vacuum chamber |
| JPH10287914A (en) * | 1997-04-16 | 1998-10-27 | Nippon Steel Corp | Method for preventing deformation of steel shell in rh vacuum degassing furnace |
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Owner name: TIANMA BEARING GROUP CO., LTD. Free format text: FORMER NAME: ZHEJIANG TIANMA BEARING CO., LTD. |
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Address after: Gongshu District Hangzhou City, Zhejiang Province Road 310015 No. 208 Patentee after: Tianma Bearing Group Co., Ltd. Address before: Gongshu District Hangzhou City, Zhejiang Province Road 310015 No. 208 Patentee before: Zhejiang TianMa Bearing Co., Ltd. |
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Effective date of registration: 20180829 Address after: 313200 8 Canal Road, Lei Dian Town, Deqing County, Huzhou, Zhejiang Patentee after: Zhejiang Tianma Bearing Group Co., Ltd. Address before: No. 208, Gongshu District Shi Xiang Road, Gongshu District, Hangzhou, Zhejiang Patentee before: Tianma Bearing Group Co., Ltd. |
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