CN107774938A - A kind of dual chamber melting furnace for having preheating and isolation air function - Google Patents
A kind of dual chamber melting furnace for having preheating and isolation air function Download PDFInfo
- Publication number
- CN107774938A CN107774938A CN201610722516.6A CN201610722516A CN107774938A CN 107774938 A CN107774938 A CN 107774938A CN 201610722516 A CN201610722516 A CN 201610722516A CN 107774938 A CN107774938 A CN 107774938A
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- Prior art keywords
- chamber
- preheating
- melting
- stove
- melting furnace
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
- B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/005—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like with heating or cooling means
- B22D41/01—Heating means
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
Abstract
The invention discloses a kind of dual chamber melting furnace for having preheating and isolation air function, including stove outer covering, stove inner casing, electric heating layer and charge door, stove inner housing inner is provided with baffle plate, the inner space of stove inner casing is divided into melting chamber and rest chamber by the baffle plate, connecting tube, drainage conduit, air inlet pipe, blast pipe and delivery pipe are provided with the outside of stove outer covering, the conveying axis to exterior space and are connected with drive device through conveying end surfaces, and conveying axis are provided with helical blade.The present invention devises fusing cell structure; traditional feed pipe is set to possess the function of preheating workpiece to be melted; and integrated design melting chamber and rest chamber; save fusing time and heat energy; production efficiency is improved, is also passed through protection gas, workpiece and air contact are avoided in charging, melting stage; in the hydrogen that rest chamber has been taken out of in molten metal, casting quality is improved.
Description
Technical field
The present invention relates to a kind of metallurgical plant, and in particular to a kind of dual chamber melting furnace for having preheating and isolation air function.
Background technology
Door and window as in people's daily life often in contact with to article, not only play and keep out wind and rain, be heat-insulated, insulating against sound, adopting
Light, ventilation etc. act on, but also are the important components of architectural image, and their shape, size, color, moulding etc. are to building
Building the moulded of thing has critically important influence.As the improvement of people's living standards, people are more next to the demand of door and window
Bigger, the requirement to door and window is also more and more diversified.
Aluminum alloy doors and windows are an important branch of door and window, aluminum alloy doors and windows refer to use aluminum alloy extrusion section bar for frame,
The door and window that stile, fan material make.Aluminum alloy doors and windows are because having the characteristics that attractive in appearance, sealing, intensity is high is widely used.Aluminium alloy
The section bar and glass style of door and window are divided into glazing bar style and flower glass style, wherein, glazing bar style is based on aluminium is thick, style is sedate
Characteristic is wanted, for flower glass style with aluminium various shapes, style vivaciously for main characteristics, style has lattice, ice sculpture, low relief, brilliant shellfish etc..
The first procedure is exactly blanking in the aluminum alloy doors and windows technological process of production, and required aluminium can be obtained by blanking
Alloy frame material and fan material, however, no matter the device of blanking has more accurate and high-end, much discarded leftover pieces can be all produced, it is right
For a factory, if these discarded leftover pieces, which are directly thrown away, to cause the loss of flood tide, many enterprises all select now
Select and try every possible means efficiently to reclaim these discarded leftover pieces so as to reduce the production cost of aluminum alloy doors and windows to reach lifting oneself
The purpose of product competitiveness.
The first step of recovery aluminium alloy scrap needs to melt these aluminium alloy scraps, and equipment used is melting furnace, fusing
Stove can meet aluminum alloy melting technique well.But traditional melting furnace only possesses the function of melting metal, and metal melt
Preceding warm is then used alone preheating furnace and preheated, and the workpiece after preheating is taken out and added to molten again after the completion of preheating
Change and melted in stove, after the completion of fusing, then the metal liquid in melting furnace is transferred in standing furnace and carries out concise, so done
The workload of operating personnel is not only increased, and increases thermal energy consumption so that low production efficiency.In addition, feeding and melting
Oxidation can be produced during changing aluminium alloy, during oxygen in aluminium alloy and air, being contacted with the water in air can be so that forms
Serious pin hole is produced on Mechanical processing of casting face, the serious quality for reducing casting.
The content of the invention
The technical problems to be solved by the invention are directed to the shortcomings that conventional fused stove, there is provided one kind has preheating and isolation air
The dual chamber melting furnace of function, solving conventional fused stove needs energy consumption caused by extra setting preheating furnace and standing furnace big and increases
Operating personnel's workload and conventional fused stove are being fed with the melting stage without the casting matter completely cut off well caused by air
Measure the problem of low.
The present invention is achieved through the following technical solutions：A kind of dual chamber melting furnace for having preheating and isolation air function, including
Stove outer covering and charge door, the stove outer covering inner side are provided with stove inner casing, electric heating layer, stove are provided between stove outer covering and stove inner casing
Inner housing inner is provided with baffle plate, and the inner space of stove inner casing is divided into two parts by the baffle plate, and wherein top is divided into melting chamber, under
Part is rest chamber, and connecting tube, drainage conduit, air inlet pipe, blast pipe and delivery pipe are provided with the outside of stove outer covering, wherein, it is described
Connecting tube connects melting chamber and rest chamber, and the drainage conduit, blast pipe all connect exterior space and rest chamber, and the air inlet pipe connects
Exterior space, melting chamber and rest chamber are connect, for the delivery pipe through stove outer covering side into melting chamber, the delivery pipe runs through stove
Into melting chamber, delivery pipe one end connects with melting chamber for shell side, the end face closing of the other end, and top connects on the outside of delivery pipe
Charge door, the charge door are connected inside exterior space and delivery pipe, conveying axis are provided with delivery pipe, the conveying axis run through
Conveying end surfaces to exterior space and are connected with drive device, and conveying axis are provided with helical blade.In the prior art, in order to
Solve the concise problem after the completion of workpiece to be melted preheating and fusing, it is general it is special preheating furnace and standing furnace be set, preheating furnace and
Standing furnace is required for individually heating, and wastes the energy, and after preheated workpiece is taken out from preheating furnace, because workpiece is gold
Category, it can be radiated with faster speed, conventional method needs operating personnel to take out workpiece from preheating furnace and puts the workpiece in fusing
Stove, and the molten metal in melting chamber is transferred in rest chamber, the workload of operating personnel is added, when adding technique
Between；On the other hand, in process of production, there is the problem of serious in the fusing to metal especially aluminium alloy, i.e., aluminium alloy is molten
Hydrogen can be absorbed during change, causes to produce pin hole on Mechanical processing of casting face so as to reduce the quality of product, the hydrogen in aluminium liquid is main
Source is the reaction of aluminium liquid and steam, although any instrument used in production can all dry, is still for aluminium liquid
Moist, it is adsorbed hydrogen, most of hydrogen is dissolved in aluminium liquid in the form of atom, and also fraction is adsorbed with molecular forms
In the surface of aluminium liquid or gap.In order to solve the above mentioned problem of conventional fused stove, the present invention propose one kind have preheating and every
The dual chamber melting furnace of exhausted air function is true by air inlet pipe connective protection gas cylinder, blast pipe connection first when using the present apparatus
Empty pump, connecting tube is opened, then melting chamber and standing chamber inner space are replaced using protection gas, after the completion of displacement, closed
Connecting tube is closed, blast pipe is connected air or is passed through in observation oil has seen whether bubble generation, keeps melting furnace and standing
The circulation of indoor protection gas, is then turned on electric heating layer, by the temperature monitoring that is arranged in melting chamber by the temperature of melting chamber
Degree control is then turned on the drive device connected in delivery pipe at 200 to 300 °, and the output end of drive device drives conveying axis rotation
Turning, so as to drive helical blade to rotate, blast pipe is closed, further open air inlet pipe angle valve, the intake of gas is protected in increase,
Charging lid is opened, and at this moment gas is discharged from charge door, and to be melted workpiece is poured into delivery pipe from charge door afterwards, treated
The workpiece of fusing is gradually delivered in melting chamber in delivery pipe by helical blade, because melting chamber has temperature, so conveying
Also there is certain temperature, and the water for workpiece surface to be melted being evaporated from the protective gas that workpiece surface to be melted flows through steams in pipe
Gas is taken out of from charge door, and workpiece to be melted is fallen into melting chamber after being gradually heated in delivery pipe, when being accumulated in melting chamber
Continue to heat the temperature of melting chamber to 600 to 700 °, the workpiece of now melting chamber bottom accumulation after the workpiece of preheating in part
Gradually fusing, and the preheating temperature that the workpiece in delivery pipe obtains also is raised, and has reached the mesh for making full use of heat energy
, after the completion of charging, charging lid is closed, opens blast pipe, keep thering is protection air-flow to lead in melting chamber and rest chamber, melting end
Divide the work after part, open connecting tube, the molten metal for melting completion in melting chamber is flowed into rest chamber, due to having protection in rest chamber
Gas is passed through, and the hydrogen that protection gas will be present in molten metal is taken out of, after molten metal discharges hydrogen in rest chamber, opens drainage conduit
Carry out cast molding.Compared with conventional fused stove, directly melted after preheated and rest chamber and melting chamber are set
Together, heat energy is not only saved, the workload of operating personnel is also reduced, saves the process time；By being fed in workpiece,
Fusing and standing stage are all passed through protection gas, workpiece and molten metal is avoided and is contacted with the oxygen in air and vapor, carry
High casting quality.
Further, one end that the connecting tube is located inside melting chamber is provided with filter screen, and the drainage conduit is positioned at standing
One end of chamber interior is provided with filter screen.The workpiece that setting filter screen can prevent from not being completely melt blocks connecting tube and drainage conduit, leads
Cause can not continuously cast molding.
Further, the output end of the drive device uses resistance to height with the part of conveying axis connection and the connecting tube
The heat-insulating material of temperature.Fusing indoor temperature is higher, if conveying axis use metal material entirely, can transfer heat to drive device causes to drive
Dynamic device receives damage, so the output end of ability drive device and the part that links of conveying axis use resistant to elevated temperatures heat-insulating material pair
Drive device is protected.Connecting tube is to ensure that when molten metal flows out from melting chamber not using the purpose of high-temperature resistant thermal insulating material
Because of the low temperature of free surrounding space heat can be caused to scatter and disappear.
Further, threeway is set in the air inlet pipe, is provided with pressure gauge in air inlet pipe, air inlet pipe is inside rest chamber
One end close to rest chamber bottom.Set threeway operating personnel can be made preferably to control protection gas, for example, displacement the stage,
Threeway, which can be adjusted, makes air inlet pipe only connect exterior space and melting chamber, protection gas is entered melting chamber from air inlet pipe, then pass through
Connecting tube enters rest chamber, is finally discharged from blast pipe, makes displacement more thorough, sets pressure gauge operating personnel can be allowed to know
Pressure in melting chamber, aspect operating personnel displacement, the mesh by the one end of air inlet pipe inside rest chamber close to rest chamber bottom
In can will protection gas be passed directly in molten metal, reach preferably remove molten metal in hydrogen purpose.
Further, the edge of the helical blade and the inwall of delivery pipe have gap, and gap is less than the leaf of helical blade
Radius surface.The edge of helical blade and the inwall of delivery pipe must have gap, otherwise the edge of helical blade and delivery pipe
Inner side can all be worn, and higher live load can be caused to drive device, but gap can not be too big, and otherwise helical blade is not
There is the function of promoting workpiece to be melted to enter melting chamber again.
Further, drive device is provided with above the stove outer covering, the output end of the drive device is connected with rotation
Axle, for the rotary shaft through stove outer covering into rest chamber, part of the rotary shaft above baffle plate is connected with the first agitating paddle, rotates
Axle bottom is connected with the second agitating paddle.Workpiece can more quickly be melted by stirring, improve the operating efficiency of melting chamber, it is quiet
Put the hydrogen that the agitating paddle in room can be such that protection gas more easily takes out of in molten metal.
Further, the length of first agitating paddle is 3/4ths of fusing chamber radius.Found by production practices,
When the length of agitating paddle is melts 3/4ths of chamber radius, the operating efficiency highest of melting chamber, that is, the driving of rotary shaft is connected
Device can carry out most uniform stirring with the live load of minimum to the workpiece in melting chamber.
Further, the length of second agitating paddle is 3/4ths of the first paddle length.Pass through production practices
It was found that when the length of the second agitating paddle is 3/4ths of the first paddle length, the mixing effect in rest chamber is optimal, because
Rest chamber and stirring that need not be very violent, its purpose is primarily to discharge the hydrogen in molten metal.
Further, the output end of the drive device and the part for rotating axis connection are resistant to elevated temperatures heat-insulating material.This
The purpose that sample is set is also to the drive device of protection connection rotary shaft, the temperature for making it not conducted because of rotary shaft
And produce damage.
The present invention compared with prior art, has the following advantages and advantages：
1st, the present invention changes feeding manner, traditional feed pipe is possessed the function of preheating workpiece to be melted,
Reduce the work load of operating personnel, save fusing time, saved heat energy, improve production efficiency；
2nd, the present invention using protection gas not only makes workpiece to be melted in charging, fusing and air exclusion, has also taken away positioned at quiet
Put the hydrogen contained in the molten metal of room.
3rd, the present invention uses dual chamber design, it is not necessary to molten metal is transferred in standing furnace again after the completion of fusing, simplified
Operating procedure, saves heat energy and fusing time.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding the embodiment of the present invention, forms one of the application
Point, do not form the restriction to the embodiment of the present invention.In the accompanying drawings：
Fig. 1 is the structural representation of semi-section of the present invention.
Mark and corresponding parts title in accompanying drawing：
1- stove outer coverings, 2- stove inner casings, 3- electric heating layers, 4- connecting tubes, 5- delivery pipes, 6- conveying axis, 7- helical blades, 8- add
Material mouth, 9- drainage conduits, 10- air inlet pipe, 11- blast pipes, 12- rotary shafts.
Embodiment
For the object, technical solutions and advantages of the present invention are more clearly understood, with reference to embodiment and accompanying drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation are only used for explaining the present invention, do not make
For limitation of the invention.
Embodiment
As shown in figure 1, the present invention is a kind of dual chamber melting furnace for having preheating and isolation air function, including the He of stove outer covering 1
Charge door 8, the inner side of the stove outer covering 1 are provided with stove inner casing 2, are provided with electric heating layer 3 between stove outer covering 1 and stove inner casing 2, in stove
Shell 2 is internally provided with baffle plate, and the inner space of stove inner casing 2 is divided into two parts by the baffle plate, and wherein top is divided into melting chamber, under
Part is rest chamber, and the outside of stove outer covering 1 is provided with connecting tube 4, drainage conduit 9, air inlet pipe 10, blast pipe 11 and delivery pipe 5, its
In, the connecting tube 4 connects melting chamber and rest chamber, the drainage conduit 9, blast pipe 11 all connect exterior space and rest chamber,
The air inlet pipe 10 connects exterior space, melting chamber and rest chamber, and the delivery pipe 5 runs through the side of stove outer covering 1 into melting chamber,
The one end of delivery pipe 5 connects with melting chamber, the end face closing of the other end, the outside of delivery pipe 5 top connection charge door 8, the charging
Mouth 8 is connected inside exterior spaces and delivery pipe 5, conveying axis 6 is provided with delivery pipe 5, the conveying axis 6 run through the end of delivery pipe 5
Face is to exterior space and is connected with drive device, and conveying axis 6 are provided with helical blade 7.Further, the connecting tube 4
One end inside melting chamber is provided with filter screen, and one end that the drainage conduit 9 is located inside rest chamber is provided with filter screen.Enter one
With walking, the part and the connecting tube 4 that the output end of the drive device is connected with conveying axis 6 use resistant to elevated temperatures heat insulating material
Material.Further, threeway is set in the air inlet pipe 10, is provided with pressure gauge in air inlet pipe 10, air inlet pipe 10 is in rest chamber
The one end in portion is close to rest chamber bottom.Further, there are gap, gap in the edge of the helical blade 7 with the inwall of delivery pipe 5
Less than the blade face radius of helical blade 7.Further, the top of stove outer covering 1 is provided with drive device, the drive device
Output end is connected with rotary shaft 12, and the rotary shaft 12 runs through stove outer covering 1 into rest chamber, portion of the rotary shaft 12 above baffle plate
Divide and be connected with the first agitating paddle, the bottom of rotary shaft 12 is connected with the second agitating paddle.Further, the length of first agitating paddle
To melt 3/4ths of chamber radius.Further, the length of second agitating paddle for the first paddle length four/
Three.Further, the part that the output end of the drive device is connected with rotary shaft 12 is resistant to elevated temperatures heat-insulating material.Use this
During device, first by the air in nitrogen displacement melting chamber and rest chamber, electric heating layer 3 is opened, by being arranged on melting chamber
In temperature monitoring the temperature of melting chamber is risen to 200 to 300 °, be then turned on the motor connected in delivery pipe 5, motor
Output end drives helical blade 7 to rotate by conveying axis 6, after melting chamber is kept for 200 to 300 ° of a period of times, closes blast pipe
11, open charge door 8 and cover so that gas is discharged from charge door 8, is continued to turn on the angle valve of air inlet pipe 10, is increased being passed through for nitrogen
Amount, workpiece to be melted is poured into delivery pipe 5 from charge door 8, workpiece to be melted is in delivery pipe 5 by helical blade 7
Gradually it is delivered in melting chamber, workpiece to be melted is fallen into melting chamber after being gradually heated in delivery pipe 5, when in melting chamber
After accumulation portion lease making crosses the workpiece of preheating, the motor positioned at the top of stove outer covering 1 is opened, motor drives first to stir by rotary shaft 12
Mix oar and the second agitating paddle starts to stir, continue to heat the temperature of melting chamber afterwards to 600 to 700 °, now melting chamber bottom heap
Long-pending workpiece is with stirring gradually fusing, and the preheating temperature that the workpiece in delivery pipe 5 obtains also is raised, to be melted
Workpiece is gradually heated up during melting chamber is transported to, and is directly melted after the completion of preheating, after to be fed, is closed
Charge door 8 covers, and opens blast pipe 11, reduces the intake of nitrogen, keeps nitrogen to be circulated in melting chamber and rest chamber, melts
After changing a part of workpiece, connecting tube 4 is opened, molten metal enters in rest chamber and stirred by the second agitating paddle, and nitrogen is from air inlet pipe
In the middle molten metal into rest chamber, and the hydrogen in molten metal is taken out of from blast pipe 11, molten metal stirs in rest chamber
After mixing one end time, drainage conduit 9 is opened to die casting member.
Above-described embodiment, the purpose of the present invention, technical scheme and beneficial effect are carried out further
Describe in detail, should be understood that the embodiment that the foregoing is only the present invention, be not intended to limit the present invention
Protection domain, within the spirit and principles of the invention, any modification, equivalent substitution and improvements done etc., all should include
Within protection scope of the present invention.
Claims (9)
1. a kind of dual chamber melting furnace for having preheating and isolation air function, including stove outer covering（1）And charge door（8）, outside the stove
Shell（1）Inner side is provided with stove inner casing（2）, it is characterised in that stove outer covering（1）With stove inner casing（2）Between be provided with electric heating layer
（3）, stove inner casing（2）It is internally provided with baffle plate, the baffle plate is by stove inner casing（2）Inner space be divided into two parts, its middle and upper part
It is divided into melting chamber, bottom is divided into rest chamber, stove outer covering（1）Outside be provided with connecting tube（4）, drainage conduit（9）, air inlet pipe
（10）, blast pipe（11）And delivery pipe（5）, wherein, the connecting tube（4）Connect melting chamber and rest chamber, the drainage conduit
（9）, blast pipe（11）All connect exterior space and rest chamber, the air inlet pipe（10）Connect exterior space, melting chamber and standing
Room, the delivery pipe（5）Through stove outer covering（1）Side is into melting chamber, delivery pipe（5）One end connects with melting chamber, the other end
End face closing, delivery pipe（5）Connection charge door above outside（8）, the charge door（8）Connect exterior space and delivery pipe
（5）Inside, delivery pipe（5）Inside it is provided with conveying axis（6）, the conveying axis（6）Through delivery pipe（5）End face to exterior space and
Drive device is connected with, around conveying axis（6）It is provided with helical blade（7）.
2. a kind of dual chamber melting furnace for having preheating and isolation air function according to claim 1, it is characterised in that described
Connecting tube（4）One end inside melting chamber is provided with filter screen, the drainage conduit（9）One end inside rest chamber is set
There is filter screen.
3. a kind of dual chamber melting furnace for having preheating and isolation air function according to claim 1, it is characterised in that described
The output end and conveying axis of drive device（6）The part of connection and the connecting tube（4）Using resistant to elevated temperatures heat-insulating material.
4. a kind of dual chamber melting furnace for having preheating and isolation air function according to claim 1, it is characterised in that described
Air inlet pipe（10）Interior setting threeway, air inlet pipe（10）On be provided with pressure gauge, air inlet pipe（10）One end inside rest chamber is leaned on
Nearly rest chamber bottom.
5. a kind of dual chamber melting furnace for having preheating and isolation air function according to claim 1, it is characterised in that described
Helical blade（7）Edge and delivery pipe（5）Inwall have gap, gap is less than helical blade（7）Blade face radius.
6. a kind of dual chamber melting furnace for having preheating and isolation air function according to claim 1, it is characterised in that described
Stove outer covering（1）Top is provided with drive device, and the output end of the drive device is connected with rotary shaft（12）, the rotary shaft
（12）Through stove outer covering（1）Into rest chamber, rotary shaft（12）Part above baffle plate is connected with the first agitating paddle, rotary shaft
（12）Bottom is connected with the second agitating paddle.
7. a kind of dual chamber melting furnace for having preheating and isolation air function according to claim 6, it is characterised in that described
The length of first agitating paddle is 3/4ths of fusing chamber radius.
8. a kind of dual chamber melting furnace for having preheating and isolation air function according to claim 6, it is characterised in that described
The length of second agitating paddle is 3/4ths of the first paddle length.
9. a kind of dual chamber melting furnace for having preheating and isolation air function according to claim 6, it is characterised in that described
The output end and rotary shaft of drive device（12）The part of connection is resistant to elevated temperatures heat-insulating material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610722516.6A CN107774938A (en) | 2016-08-25 | 2016-08-25 | A kind of dual chamber melting furnace for having preheating and isolation air function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610722516.6A CN107774938A (en) | 2016-08-25 | 2016-08-25 | A kind of dual chamber melting furnace for having preheating and isolation air function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107774938A true CN107774938A (en) | 2018-03-09 |
Family
ID=61393365
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610722516.6A Withdrawn CN107774938A (en) | 2016-08-25 | 2016-08-25 | A kind of dual chamber melting furnace for having preheating and isolation air function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107774938A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111440924A (en) * | 2020-04-24 | 2020-07-24 | 中国重型机械研究院股份公司 | Temperature drop correction method for pipeline design of mechanical vacuum pump system for steelmaking |
-
2016
- 2016-08-25 CN CN201610722516.6A patent/CN107774938A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111440924A (en) * | 2020-04-24 | 2020-07-24 | 中国重型机械研究院股份公司 | Temperature drop correction method for pipeline design of mechanical vacuum pump system for steelmaking |
| CN111440924B (en) * | 2020-04-24 | 2021-03-19 | 中国重型机械研究院股份公司 | Temperature drop correction method for pipeline design of mechanical vacuum pump system for steelmaking |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180309 |
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| WW01 | Invention patent application withdrawn after publication |