CN108817339A - A kind of negative pressure casting apparatus and negative pressure continuous cast method - Google Patents
A kind of negative pressure casting apparatus and negative pressure continuous cast method Download PDFInfo
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- CN108817339A CN108817339A CN201810637816.3A CN201810637816A CN108817339A CN 108817339 A CN108817339 A CN 108817339A CN 201810637816 A CN201810637816 A CN 201810637816A CN 108817339 A CN108817339 A CN 108817339A
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- diversion pipe
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/14—Plants for continuous casting
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Abstract
A kind of negative pressure casting apparatus and method, belong to metal casting technique field.The present invention is evacuated by installing extract system on casting apparatus, the inside cavity for collectively forming diversion pipe and casting mold etc. forms negative pressure, it realizes actively to attract in continuous casting process in metal bath and quickly escapes metal bath with the gas in solid liquid interface forward position, help to obtain the low high-test metal slab of gas content.Negative pressure casting apparatus structure of the invention is simple, operation is easy to maintenance, high production efficiency, applied widely, manufacturing cost is low, can safely, low cost, efficiently produce various specifications, low-gas content, high quality metal slab, particularly suitable for holding furnace lower than casting mold horizontal continuous casting or under draw formula continuous casting.
Description
Technical field
The invention belongs to metal casting technique field, a kind of negative pressure casting apparatus and negative pressure Continuous Casting Square are in particular, provided
Method.
Background technique
It is well known that the appearance of continuous casting technology is the great prominent of field of metal preparation for die casting technology
Broken and qualitative leap, have recovery rate of iron is high, low energy consumption, production link shortens, required people when few, low equipment investment, favorably
It is a kind of typical metal material short flow high efficiency system in the advantage for realizing continuous production and a series of protrusions such as increasingly automated
Standby technology.Most metals material, which is substantially all, at present carries out large-scale production using continuous casting technology.With new and high technology
The increasingly raising with living standards of the people is grown rapidly, higher and higher want is proposed to the quality of the metal slab of continuous casting
It asks, it is particularly desired to which the unfavorable factor that gas content in metal slab etc. restricts metal product performance boost can obtain further
Control and reduction.
Traditional continuous casting technology mainly include it is common under draw and draw continuous casting technology, continuous up-casting technology under continuous casting technology, siphon pipe
And horizontal continuous casting technology.For other existing several continuous casting technologies, draw continuous casting technology in continuous casting process under common
Opposite exhaust effect is best, and metal slab internal gas content is minimum, quality highest, but bleedout problem easily occurs in continuous casting process,
Safety is poor, and equipment installation footprint is big, inconvenient for operation, it is difficult to continuous production large scale metal slab；Siphon pipe
Under draw continuous casting technology solve it is common under draw the incident bleedout safety problem of continuous casting technology, but device structure is complicated, installation institute
It needs space big, inconvenient for operation, is still difficult to continuous production large scale metal slab, and exhaust effect is deteriorated, metal casting
Base internal gas content increased, quality is declined；Bleedout phenomenon will not occur for continuous up-casting technology, but be unfavorable for arranging
Gas, metal slab internal gas content is high, second-rate, and there is cooling waters possibly into the danger in metal bath；Water
The device structure of flat continuous casting technology is simple and convenient to operate, bleedout or cooling water safety are easily controllable, it is easy to accomplish various specifications
The continuous production of slab, but exhaust effect is poor, and metal slab internal gas content is higher, second-rate.In addition, connecting in tradition
In casting technology, the gas in metal bath and at solid liquid interface forward position is completely in continuous casting process a kind of to be escaped at random naturally
And the non-active state for attracting evolution, causing gas to be discharged to, the speed outside metal bath is slower, so that the gas in metal slab
Body content is difficult to control accurately, and limits the raising of drawing speed.Particularly, even drawing continuous casting technology under common, when
When the drawing speed of continuous casting is higher in production, the gas in metal bath and at solid liquid interface forward position, which also has, greatly to be come not
And evolution, it still can enter in the metal slab quickly solidified, cause to be deteriorated inside metal slab containing bulk gas, quality；
Other existing several continuous casting technologies in this respect the problem of it is more prominent.This defect existing for traditional continuous casting technology becomes system
The about bottleneck problem of high-test metal slab production, it would be highly desirable to improve.
In conclusion there is bleedouts easy in continuous casting process or cooling water possibly into metal bath etc. for traditional continuous casting technology
Security risk, and lack the method for actively quickly attracting the gas evolution in metal bath and at solid liquid interface forward position and cause
Exhaust effect it is poor the problems such as, it is difficult to low-cost high-efficiency continuous production meets the high-test metal casting of higher requirement
Base.Therefore, a kind of new continuous casting technology is developed, safety, efficiently produces various specifications, low-gas content, high quality at low cost
Metal slab, have a very important significance.
Summary of the invention
The present invention is directed to deficiency existing for traditional continuous casting technology, extract system is installed on casting apparatus, by extract system
Be connected with diversion pipe, before continuous casting starts, by extract system extract out diversion pipe and casting mold etc. in gas, make diversion pipe and
Pressure difference is generated between the cavity that casting mold etc. collectively forms and outside, inside cavity forms negative pressure, so that metal bath energy
Continuously flow through diversion pipe from holding furnace and sluice way enter casting mold, and inside casting mold or near exit occur it is solidifying
Gu realizing continuous casting forming under the action of dummy bar.Especially since negative pressure region is deposited at the top of diversion pipe in continuous casting process
Becoming the control measures for actively quickly attracting the gas evolution in metal bath and at solid liquid interface forward position, is promoting to allow gas to
It is enough discharged fast into except metal bath, continuously reduces the gas content in metal bath.It is an object of the invention to
A kind of negative pressure casting apparatus and method are provided, can solve in continuous casting process existing for traditional continuous casting technology that easy bleedout or cooling water can
The problems such as can enter the security risks such as metal bath and poor exhaust effect, low-cost high-efficiency continuous production go out low gas and contain
The high-test metal slab of amount.
A kind of negative pressure casting apparatus, by melting furnace, chute, holding furnace, diversion pipe, temperature measuring equipment, extract system, drainage
Road, heat insulation structural, casting mold, cooler, dummy bar and traction mechanism composition.The melting furnace and the holding furnace are arranged in juxtaposition,
Centre is connected to by the chute；The heat preservation furnace bottom, the other end and the extract system are inserted into one end of the diversion pipe
Connection；The temperature measuring equipment is mounted on one end that the diversion pipe is connected with the extract system, for monitoring metal bath
Rise to the liquid level in the diversion pipe；The sluice way is mounted on the side of the diversion pipe, both ends respectively with it is described
Diversion pipe is connected with the casting mold；It is separated between the sluice way and the casting mold using the heat insulation structural, the sluice way,
The heat insulation structural and the casting mold are integrated；The cooler is set to the near exit of the casting mold, to metal
Slab carries out pressure cooling；Along metal slab draw direction the traction mechanism is installed behind the cooler, realizes gold
Belong to the continuous drawing of slab；The casting mold, the cooler and the traction mechanism are distributed in along metal slab draw direction
On same axis；One end of the dummy bar is protruded into the casting mold and the cooler, and the other end is matched with the traction mechanism
It closes, realizes the traction to metal slab.
Further, the melting furnace is installed on to the top side of the holding furnace, the fusing is controlled by stopper rod
Furnace flows into the flow of the metal bath in the holding furnace.
Further, the melting furnace and the holding furnace are placed in air, vacuum, are filled with nitrogen or are filled with indifferent gas
In the environment of body protection.
Further, the melting furnace is replaced using tundish, metal bath is constantly quickly provided, in order to carry out efficiently
Continuous production.
Further, the casting mold using cooling casting mold, heated mold, two-phase section casting mold, low-heat casting mold, the warm casting mold of ladder,
Any one of hot-cold group co-casting or temperature control casting mold.
Further, the casting mold and the cooler are designed as overall structure, and centre is separated using heat insulating mattress.
Further, sealing ring is housed on the inner wall at the cooler outlet, prevents from drawing described in ambient atmos entrance
Between spindle blade and the cooler or between metal slab and the cooler.
Further, 1~100 set is connected on the diversion pipe by the sluice way, the heat insulation structural, the casting mold
The streamline constituted with the cooler, the negative pressure casting apparatus contain 1~100 diversion pipe.
Further, the negative pressure casting apparatus can be arranged secondary cold between the cooler and the traction mechanism
But device.
Further, the negative pressure casting apparatus can cancel the cooler.
Further, the negative pressure casting apparatus is controlled using manual control or computer, using horizontal, under draw formula or
Any one of top-guiding type.
A kind of negative pressure continuous cast method using negative pressure casting apparatus as described above, preparation process are：
It after one end of the dummy bar successively passes through the traction mechanism and the cooler, protrudes into the casting mold, institute
The inner wall for stating the dummy bar head and the casting mold corresponding position of dummy bar fits closely；Raw material metal melts in the melting furnace
As metal bath, metal bath flows into the holding furnace by the chute from the melting furnace；In the extract system
In preset decompression rate, the extract system is opened, to the diversion pipe, the sluice way, the heat insulation structural and the casting
The airtight cavity that type collectively forms is evacuated, and makes to form negative pressure inside airtight cavity, pressure is generated between airtight cavity and outside
Power is poor；Metal bath in the holding furnace is continuously pressed into the diversion pipe under the action of external pressure, gradually fills out
Fill the sluice way, the heat insulation structural and the casting mold；When the liquid level of metal bath reaches on the diversion pipe in advance
When the upper limit position of the temperature measuring equipment of installation, the extract system is automatically stopped pumping, and when the liquid level of metal bath is high
When degree drops to the lower position of the preassembled temperature measuring equipment on the diversion pipe, the extract system automatically begins to take out
Gas；In the heat insulation structural under the buffer action of the sluice way and the casting mold, the temperature of the casting mold is accurately controlled；?
Under the pressure cooling effect of the cooler, metal bath is inside the casting mold or near exit completes solidification；Draw described
Under the drive of spindle blade and the traction mechanism, continuous casting forming is carried out, the high-test metal slab of low-gas content is obtained；Metal casting
Cooling velocity needed for base by the drawing speed of the traction mechanism, the intensity of cooling of the cooler and the casting mold temperature
Degree is to control.
Main advantages of the present invention are：
1. the structure of negative pressure casting apparatus is simple, operates easy to maintenance, high production efficiency, applied widely, manufacturing cost
It is low, it can be used in industrialized mass production, be suitable for metal bath and realize by diversion pipe drawing and carrying out after flowing through sluice way
Horizontal continuous casting, under draw holding furnace that the occasion of formula continuous casting or top-guiding type continuous casting, especially conventional method are difficult to realize lower than casting
The horizontal continuous casting of type or under draw formula continuous casting.
2. negative pressure continuous cast method will make the gas in metal bath continuous due to the effect of negative pressure in continuous casting process
The negative pressure region without metal bath being actively quickly drawn at the top of diversion pipe, it will help reduce the gas in metal bath
Content obtains the metal bath of high quality.
3. negative pressure continuous cast method, which is conducive to the gas that solid liquid interface forward position is precipitated in continuous casting process, is quickly discharged into metal bath
In, and the negative pressure region without metal bath at the top of diversion pipe is rapidly entered under the action of negative pressure, greatly reduce metal slab
In gas content, be conducive to produce high quality metal slab.
4. the metal slab surface smoothness of negative pressure continuous cast method preparation is good, dense structure, plastic deformation ability, mechanical property
Energy, physical property and chemical property are better than the metal slab of the identical chemical component using traditional continuous casting technology preparation.
5. negative pressure continuous cast method simple possible, has wide range of applications, there is high promotional value, almost can be applied to
All metals realize the metal slab of industrial high efficiency continuous casting form high quality, and can near net shape production tubing, plate, band
The high-test metal product such as material, bar, wire rod and profile, significant simplification of flowsheet reduce production cost.
Detailed description of the invention
Fig. 1 is a kind of negative pressure casting apparatus schematic diagram of the invention.Wherein, (1) is metal bath, and (2) are melting furnace,
It (3) is chute, (4) are holding furnace, and (5) are diversion pipe, and (6) are temperature measuring equipment, and (7) are extract system, and (8) are sluice way, (9)
For heat insulation structural, (10) are casting mold, and (11) are cooler, and (12) are dummy bar, and (13) are traction mechanism.
Specific embodiment
The present invention is specifically described with reference to embodiments, it is necessary to which indicated herein is that the present embodiment is served only for pair
The present invention is further described, and should not be understood as limiting the scope of the invention, and the those of skill in the art in the field can
Some nonessential modifications and adaptations are made with the content according to aforementioned present invention.
It is described as follows in conjunction with 1 pair of attached drawing negative pressure casting apparatus of the invention：
Negative pressure casting apparatus is by melting furnace (2), chute (3), holding furnace (4), diversion pipe (5), temperature measuring equipment (6), pumping
System (7), sluice way (8), heat insulation structural (9), casting mold (10), cooler (11), dummy bar (12) and traction mechanism (13) group
At.Melting furnace (2) and holding furnace (4) are arranged in juxtaposition, and centre is connected to by chute (3)；Holding furnace is inserted into one end of diversion pipe (5)
(4) bottom, the other end are connected to extract system (7)；Temperature measuring equipment (6) is mounted on what diversion pipe (5) was connected with extract system (7)
On one end, the liquid level that is risen in diversion pipe (5) for monitoring metal bath (1)；Sluice way (8) is mounted on diversion pipe
(5) side, both ends are connected with diversion pipe (5) and casting mold (10) respectively；Heat-insulated knot is used between sluice way (8) and casting mold (10)
Structure (9) separates, and sluice way (8), heat insulation structural (9) and casting mold (10) are integrated；Cooler (11) is set to casting mold
(10) near exit carries out pressure cooling to metal slab；Pacify below along metal slab draw direction in cooler (11)
It fills traction mechanism (13), realizes the continuous drawing of metal slab；Casting mold (10), cooler (11) and traction mechanism (13) are along gold
Belong to the distribution of slab draw direction on the same axis；One end of dummy bar (12) is protruded into casting mold (10) and cooler (11), separately
One end and traction mechanism (13) cooperate, and realize the traction to metal slab.
Further, melting furnace (2) is installed on to the top side of holding furnace (4), passes through stopper rod control melting furnace (2) stream
Enter the flow of the metal bath (1) in holding furnace (4).
Further, melting furnace (2) and holding furnace (4) are placed in air, vacuum, are filled with nitrogen or are filled with inert gas
In the environment of protection.
Further, melting furnace (2) are replaced using tundish, constantly quickly metal bath (1) is provided, in order to carry out height
Imitate continuous production.
Further, casting mold (10) using cooling casting mold, heated mold, two-phase section casting mold, low-heat casting mold, the warm casting mold of ladder,
Any one of hot-cold group co-casting or temperature control casting mold.
Further, casting mold (10) and cooler (11) are designed as overall structure, and centre is separated using heat insulating mattress.
Further, sealing ring is housed on the inner wall in cooler (11) exit, prevents ambient atmos from entering dummy bar
(12) between cooler (11) or between metal slab and cooler (11).
Further, be connected on diversion pipe (5) 1~100 set by sluice way (8), heat insulation structural (9), casting mold (10) and
The continuous casting component that cooler (11) is constituted, the negative pressure casting apparatus contain 1~100 diversion pipe (5).
Further, the negative pressure casting apparatus can be arranged secondary cold between cooler (11) and traction mechanism (13)
But device.
Further, the negative pressure casting apparatus can cancel cooler (11).
Further, the negative pressure casting apparatus is controlled using manual control or computer, using horizontal, under draw formula or
Any one of top-guiding type.
Embodiment 1：
The fine copper bar base negative pressure continuous casting that diameter is 20mm shapes.
After one end of dummy bar (12) successively passes through traction mechanism (13) and cooler (11), protrudes into casting mold (10), draw
The dummy bar head of spindle blade (12) and the inner wall of casting mold (10) corresponding position fit closely；The fusing in melting furnace (2) of fine copper raw material
The fine copper melt for being 1300 DEG C at temperature, fine copper melt flow into holding furnace (4) by chute (3) from melting furnace (2)；It is being evacuated
It is 3000Pa/s that decompression rate is preset in system (7), is opened extract system (7), to diversion pipe (5), sluice way (8), heat-insulated knot
The airtight cavity that structure (9) and casting mold (10) collectively form is evacuated, and makes to form negative pressure inside airtight cavity, airtight cavity and outer
Pressure difference is generated between portion；Fine copper melt in holding furnace (4) is continuously pressed into diversion pipe under the action of external pressure
(5), sluice way (8), heat insulation structural (9) and casting mold (10) are gradually filled；When the liquid level of fine copper melt reaches diversion pipe (5)
When the upper limit position of upper preassembled temperature measuring equipment (6), extract system (7) is automatically stopped pumping, and works as the liquid of fine copper melt
When face height drops to the lower position of preassembled temperature measuring equipment (6) on diversion pipe (5), extract system (7) is automatically begun to
Pumping；In heat insulation structural (9) under the buffer action of sluice way (8) and casting mold (10), accurately the temperature of control casting mold (10) is
1200℃；It is pure under the pressure cooling effect for the cooler (11) that cooling water temperature is 15 DEG C and cooling water flow is 2000L/h
Copper melts are completed to solidify in casting mold (10) near exit；Under the drive of dummy bar (12) and traction mechanism (13), with 100mm/
The drawing speed of min carries out continuous casting forming, obtain surface-brightening, inside solid, gas content it is low, with the company along throwing direction
Continuous columanar structure, the high quality fine copper bar base that diameter is 20mm.
Embodiment 2：
Width is 100mm, shapes with a thickness of the fine copper made-up belt negative pressure continuous casting of 2mm.
After one end of dummy bar (12) successively passes through traction mechanism (13) and cooler (11), protrudes into casting mold (10), draw
The dummy bar head of spindle blade (12) and the inner wall of casting mold (10) corresponding position fit closely；The fusing in melting furnace (2) of fine copper raw material
The fine copper melt for being 1200 DEG C at temperature, fine copper melt flow into holding furnace (4) by chute (3) from melting furnace (2)；It is being evacuated
It is 2000Pa/s that decompression rate is preset in system (7), is opened extract system (7), to diversion pipe (5), sluice way (8), heat-insulated knot
The airtight cavity that structure (9) and casting mold (10) collectively form is evacuated, and makes to form negative pressure inside airtight cavity, airtight cavity and outer
Pressure difference is generated between portion；Fine copper melt in holding furnace (4) is continuously pressed into diversion pipe under the action of external pressure
(5), sluice way (8), heat insulation structural (9) and casting mold (10) are gradually filled；When the liquid level of fine copper melt reaches diversion pipe (5)
When the upper limit position of upper preassembled temperature measuring equipment (6), extract system (7) is automatically stopped pumping, and works as the liquid of fine copper melt
When face height drops to the lower position of preassembled temperature measuring equipment (6) on diversion pipe (5), extract system (7) is automatically begun to
Pumping；In heat insulation structural (9) under the buffer action of sluice way (8) and casting mold (10), accurately the temperature of control casting mold (10) is
900℃；It is pure under the pressure cooling effect for the cooler (11) that cooling water temperature is 20 DEG C and cooling water flow is 1500L/h
Copper melts complete solidification inside casting mold (10)；Under the drive of dummy bar (12) and traction mechanism (13), with 150mm/min's
Drawing speed carries out continuous casting forming, and acquisition surface is smooth, inside solid, gas content is low, has along throwing direction degree of orientation height
Columanar structure, width 100mm, the high quality fine copper made-up belt with a thickness of 2mm.
Embodiment 3：
Width is 100mm, shapes with a thickness of the T-type section copper and iron phosphorus alloy slab negative pressure continuous casting of 15mm.
After one end of dummy bar (12) successively passes through traction mechanism (13) and cooler (11), protrudes into casting mold (10), draw
The dummy bar head of spindle blade (12) and the inner wall of casting mold (10) corresponding position fit closely；Copper and iron phosphorus alloy raw material are in melting furnace (2)
It is inside fused into the copper and iron phosphorus alloy melt that temperature is 1300 DEG C, copper and iron phosphorus alloy melt is flowed from melting furnace (2) by chute (3)
Enter holding furnace (4)；It is 1000Pa/s that decompression rate is preset in extract system (7), is opened extract system (7), to diversion pipe
(5), the airtight cavity that sluice way (8), heat insulation structural (9) and casting mold (10) collectively form is evacuated, and is made inside airtight cavity
Negative pressure is formed, pressure difference is generated between airtight cavity and outside；Copper and iron phosphorus alloy melt in holding furnace (4) is in external pressure
It is continuously pressed into diversion pipe (5) under effect, gradually fills sluice way (8), heat insulation structural (9) and casting mold (10)；Work as copper and iron
When the liquid level of phosphorus alloy melt reaches the upper limit position of preassembled temperature measuring equipment (6) on diversion pipe (5), extract system
(7) it is automatically stopped pumping, and when the liquid level of copper and iron phosphorus alloy melt drops to preassembled thermometric dress on diversion pipe (5)
When setting the lower position of (6), extract system (7) automatically begins to be evacuated；In heat insulation structural (9) to sluice way (8) and casting mold (10)
Buffer action under, the accurate temperature for controlling water-cooled copper casting mold (10)；In cooling water temperature be 20 DEG C and cooling water flow is
Under the pressure cooling effect of the cooler (11) of 1000L/h, copper and iron phosphorus alloy melt completes solidification inside casting mold (10)；Drawing
Under the drive of spindle blade (12) and traction mechanism (13), continuous casting forming is carried out with the drawing speed of 130mm/min, obtains surface light
Cunning, inside solid, gas content be low, with equiaxed grain structure, width 100mm, with a thickness of the high quality T-type section copper of 15mm
Ferrophosphor(us) slab.
Embodiment 4：
Width is 20mm, shapes with a thickness of the Cu-4.7wt%Sn copper alloy slab negative pressure continuous casting of 8mm.
After one end of dummy bar (12) successively passes through traction mechanism (13) and cooler (11), protrudes into casting mold (10), draw
The dummy bar head of spindle blade (12) and the inner wall of casting mold (10) corresponding position fit closely；Cu-4.7wt%Sn copper alloy raw material are molten
Change that temperature is fused into furnace (2) is 1200 DEG C Cu-4.7wt%Sn copper alloy melt, Cu-4.7wt%Sn copper alloy melt from
Holding furnace (4) are flowed by chute (3) in melting furnace (2)；It is 800Pa/s that decompression rate is preset in extract system (7), is opened
Extract system (7) carries out the airtight cavity that diversion pipe (5), sluice way (8), heat insulation structural (9) and casting mold (10) collectively form
Pumping makes to form negative pressure inside airtight cavity, pressure difference is generated between airtight cavity and outside；Cu- in holding furnace (4)
4.7wt%Sn copper alloy melt is continuously pressed into diversion pipe (5) under the action of external pressure, gradually fills sluice way
(8), heat insulation structural (9) and casting mold (10)；When the liquid level of Cu-4.7wt%Sn copper alloy melt reaches pre- on diversion pipe (5)
When the upper limit position for the temperature measuring equipment (6) first installed, extract system (7) is automatically stopped pumping, and when Cu-4.7wt%Sn copper closes
When the liquid level of golden melt drops to the lower position of preassembled temperature measuring equipment (6) on diversion pipe (5), extract system
(7) it automatically begins to be evacuated；In heat insulation structural (9) under the buffer action of sluice way (8) and casting mold (10), casting mold is accurately controlled
(10) temperature is 1020 DEG C；It is cold in the pressure for the cooler (11) that cooling water temperature is 20 DEG C and cooling water flow is 400L/h
But under acting on, Cu-4.7wt%Sn copper alloy melt completes solidification inside casting mold (10)；In dummy bar (12) and traction mechanism
(13) under drive, continuous casting forming is carried out with the drawing speed of 35mm/min, obtains that surface is smooth, inside solid, gas content
It is low, with brilliant peritectic structure, width 20mm, with a thickness of the high quality Cu-4.7wt%Sn copper alloy slab of 8mm.
Embodiment 5：
The fine aluminium bar base negative pressure continuous casting that diameter is 15mm shapes.
After one end of dummy bar (12) successively passes through traction mechanism (13) and cooler (11), protrudes into casting mold (10), draw
The dummy bar head of spindle blade (12) and the inner wall of casting mold (10) corresponding position fit closely；The fusing in melting furnace (2) of fine aluminium raw material
The melt for being 780 DEG C at temperature, melt flow into holding furnace (4) by chute (3) from melting furnace (2)；It is being evacuated
It is 500Pa/s that decompression rate is preset in system (7), is opened extract system (7), to diversion pipe (5), sluice way (8), heat insulation structural
(9) it is evacuated with the airtight cavity that collectively forms of casting mold (10), makes to form negative pressure inside airtight cavity, airtight cavity and external
Between generate pressure difference；Melt in holding furnace (4) is continuously pressed into diversion pipe under the action of external pressure
(5), sluice way (8), heat insulation structural (9) and casting mold (10) are gradually filled；When the liquid level of melt reaches diversion pipe (5)
When the upper limit position of upper preassembled temperature measuring equipment (6), extract system (7) is automatically stopped pumping, and works as the liquid of melt
When face height drops to the lower position of preassembled temperature measuring equipment (6) on diversion pipe (5), extract system (7) is automatically begun to
Pumping；In heat insulation structural (9) under the buffer action of sluice way (8) and casting mold (10), accurately the temperature of control casting mold (10) is
600℃；Under the pressure cooling effect for the cooler (11) that cooling water temperature is 20 DEG C and cooling water flow is 600L/h, fine aluminium
Melt completes solidification inside casting mold (10)；Under the drive of dummy bar (12) and traction mechanism (13), with the drawing of 80mm/min
Base speed carries out continuous casting forming, obtain surface-brightening, inside solid, gas content it is low, with high along the throwing direction degree of orientation
Columanar structure, the high quality fine aluminium bar base that diameter is 15mm.
Claims (10)
1. a kind of negative pressure casting apparatus, which is characterized in that by melting furnace (2), chute (3), holding furnace (4), diversion pipe (5), survey
Warm device (6), extract system (7), sluice way (8), heat insulation structural (9), casting mold (10), cooler (11), dummy bar (12) and
Traction mechanism (13) composition；Melting furnace (2) and holding furnace (4) are arranged in juxtaposition, and centre is connected to by chute (3)；Diversion pipe (5)
Holding furnace (4) bottom is inserted into one end, and the other end is connected to extract system (7)；Temperature measuring equipment (6) is mounted on diversion pipe (5) and takes out
On the connected one end of gas system (7), the liquid level that is risen in diversion pipe (5) for monitoring metal bath (1)；Sluice way
(8) it is mounted on the side of diversion pipe (5), both ends are connected with diversion pipe (5) and casting mold (10) respectively；Sluice way (8) and casting mold
(10) it is separated between using heat insulation structural (9), sluice way (8), heat insulation structural (9) and casting mold (10) are integrated；It is cooling
Device (11) is set to the near exit of casting mold (10), carries out pressure cooling to metal slab；Exist along metal slab draw direction
Cooler (11) installs traction mechanism (13) below, realizes the continuous drawing of metal slab；It casting mold (10), cooler (11) and leads
Draw mechanism (13) to be distributed on the same axis along metal slab draw direction；One end of dummy bar (12) protrude into casting mold (10) and
In cooler (11), the other end and traction mechanism (13) cooperate, and realize the traction to metal slab.
2. a kind of negative pressure casting apparatus as described in claim 1, which is characterized in that melting furnace (2) is installed on holding furnace (4)
Top side, pass through stopper rod control melting furnace (2) flow into holding furnace (4) in metal bath (1) flow.
3. a kind of negative pressure casting apparatus as described in claim 1, which is characterized in that place melting furnace (2) and holding furnace (4)
In air, vacuum, be filled in nitrogen or the environment for being filled with inert gas shielding, casting mold (10) using cooling casting mold, heated mold,
Any one of the warm casting mold of two-phase section casting mold, low-heat casting mold, ladder, hot-cold group co-casting or temperature control casting mold；On diversion pipe (5)
It is connected to 1~100 set of continuous casting component being made of sluice way (8), heat insulation structural (9), casting mold (10) and cooler (11), it is described
Negative pressure casting apparatus contains 1~100 diversion pipe (5).
4. a kind of negative pressure casting apparatus as described in claim 1, which is characterized in that replace melting furnace (2) using tundish, no
It is disconnected quickly to provide metal bath (1), in order to carry out high-efficiency and continuous production.
5. a kind of negative pressure casting apparatus as described in claim 1, which is characterized in that casting mold (10) is designed as with cooler (11)
Overall structure, centre are separated using heat insulating mattress.
6. a kind of negative pressure casting apparatus as described in claim 1, which is characterized in that on the inner wall in cooler (11) exit
Equipped with sealing ring, prevent ambient atmos enter between dummy bar (12) and cooler (11) or metal slab and cooler (11) it
Between.
7. a kind of negative pressure casting apparatus as described in claim 1, which is characterized in that the negative pressure casting apparatus is in cooler
(11) recoler is set between traction mechanism (13).
8. a kind of negative pressure casting apparatus as described in claim 1, which is characterized in that the negative pressure casting apparatus eliminates cooling
Device (11).
9. a kind of negative pressure casting apparatus as described in claim 1, which is characterized in that the negative pressure casting apparatus is using artificial control
System or computer control, using horizontal, under draw any one of formula or top-guiding type.
10. a kind of using a kind of negative pressure continuous cast method of negative pressure casting apparatus described in claim 1, which is characterized in that preparation
Technique is：After one end of dummy bar (12) successively passes through traction mechanism (13) and cooler (11), protrude into casting mold (10), dummy ingot
The dummy bar head of bar (12) and the inner wall of casting mold (10) corresponding position fit closely；Raw material metal is fused into melting furnace (2)
For metal bath (1), metal bath (1) flows into holding furnace (4) by chute (3) from melting furnace (2)；In extract system (7)
In preset decompression rate, open extract system (7), to diversion pipe (5), sluice way (8), heat insulation structural (9) and casting mold (10) be total to
It is evacuated with the airtight cavity constituted, makes to form negative pressure inside airtight cavity, pressure difference is generated between airtight cavity and outside；
Metal bath (1) in holding furnace (4) is continuously pressed into diversion pipe (5) under the action of external pressure, and gradually filling is drawn
Runner (8), heat insulation structural (9) and casting mold (10)；It is installed in advance on diversion pipe (5) when the liquid level of metal bath (1) reaches
Temperature measuring equipment (6) upper limit position when, extract system (7) is automatically stopped pumping, and when under the liquid level of metal bath (1)
When dropping to the lower position of preassembled temperature measuring equipment (6) on diversion pipe (5), extract system (7) automatically begins to be evacuated；Every
Heat structure (9) accurately controls the temperature of casting mold (10) under the buffer action of sluice way (8) and casting mold (10)；In cooler
(11) under pressure cooling effect, metal bath (1) completes solidification in casting mold (10) inside or near exit；In dummy bar (12)
Under drive with traction mechanism (13), continuous casting forming is carried out, the high-test metal slab of low-gas content is obtained；Metal slab institute
Need cooling velocity by the temperature of the drawing speed of traction mechanism (13), the intensity of cooling of cooler (11) and casting mold (10) Lai
Control.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810637816.3A CN108817339B (en) | 2018-06-20 | 2018-06-20 | Negative pressure continuous casting device and negative pressure continuous casting method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810637816.3A CN108817339B (en) | 2018-06-20 | 2018-06-20 | Negative pressure continuous casting device and negative pressure continuous casting method |
Publications (2)
| Publication Number | Publication Date |
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| CN108817339A true CN108817339A (en) | 2018-11-16 |
| CN108817339B CN108817339B (en) | 2020-04-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| FR394099A (en) * | 1907-09-11 | 1909-01-14 | Mathieu Douteur | Manufacturing and handling process for ingots |
| GB1493572A (en) * | 1973-10-04 | 1977-11-30 | Davy Int Ltd | Continuous casting apparatus |
| SE8202230L (en) * | 1982-04-07 | 1983-10-08 | Korshunov Evgeny | METHOD AND INSTALLATION FOR METAL CASTING |
| US4463796A (en) * | 1982-03-11 | 1984-08-07 | Korshunov Evgeny A | Continuous metal casting method and plant for performing same |
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| EP0749789A1 (en) * | 1995-06-22 | 1996-12-27 | MANNESMANN Aktiengesellschaft | Continuous casting machine with heatable multichamber furnace comprising a dependent mould |
| CN1282279A (en) * | 1997-12-19 | 2001-01-31 | Sms德马格股份公司 | Device for feeding molten metal |
| CN1317383A (en) * | 2001-03-22 | 2001-10-17 | 上海交通大学 | Horizontal conticaster dedicated for Mg-alloy |
| CN107790658A (en) * | 2017-10-24 | 2018-03-13 | 江西理工大学 | One Albatra metal vacuum continuous smelting casting method |
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2018
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR394099A (en) * | 1907-09-11 | 1909-01-14 | Mathieu Douteur | Manufacturing and handling process for ingots |
| GB1493572A (en) * | 1973-10-04 | 1977-11-30 | Davy Int Ltd | Continuous casting apparatus |
| US4463796A (en) * | 1982-03-11 | 1984-08-07 | Korshunov Evgeny A | Continuous metal casting method and plant for performing same |
| SE8202230L (en) * | 1982-04-07 | 1983-10-08 | Korshunov Evgeny | METHOD AND INSTALLATION FOR METAL CASTING |
| CN2182013Y (en) * | 1994-02-22 | 1994-11-09 | 山东省烟台造锁总厂 | Level continuous suction pouring apparatus |
| EP0749789A1 (en) * | 1995-06-22 | 1996-12-27 | MANNESMANN Aktiengesellschaft | Continuous casting machine with heatable multichamber furnace comprising a dependent mould |
| TW330163B (en) * | 1995-06-22 | 1998-04-21 | Mannesmann Ag | Continuous casting installation |
| CN1282279A (en) * | 1997-12-19 | 2001-01-31 | Sms德马格股份公司 | Device for feeding molten metal |
| CN1317383A (en) * | 2001-03-22 | 2001-10-17 | 上海交通大学 | Horizontal conticaster dedicated for Mg-alloy |
| CN107790658A (en) * | 2017-10-24 | 2018-03-13 | 江西理工大学 | One Albatra metal vacuum continuous smelting casting method |
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| Publication number | Publication date |
|---|---|
| CN108817339B (en) | 2020-04-14 |
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