CN107737907B - Using the uphill casting device and method of blowing nanoparticle and argon gas refinement ingot structure - Google Patents
Using the uphill casting device and method of blowing nanoparticle and argon gas refinement ingot structure Download PDFInfo
- Publication number
- CN107737907B CN107737907B CN201710984167.XA CN201710984167A CN107737907B CN 107737907 B CN107737907 B CN 107737907B CN 201710984167 A CN201710984167 A CN 201710984167A CN 107737907 B CN107737907 B CN 107737907B
- Authority
- CN
- China
- Prior art keywords
- nanoparticle
- blowing
- air
- ingot
- brick
- Prior art date
- 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.)
- Active
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D23/00—Casting processes not provided for in groups B22D1/00 - B22D21/00
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/20—Measures not previously mentioned for influencing the grain structure or texture; Selection of compositions therefor
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
The present invention relates to steel ingot casting technology field more particularly to a kind of uphill casting device and methods using blowing nanoparticle and argon gas refinement ingot structure.The inventive system comprises air supply system, nanometer separating station, pouring device and Tang Dao to be blown element, two gas circuits are wherein separated on the air-flow distributor of air supply system to connect with nanometer separating station, nanometer air delivery tube in nanometer separating station is connected with soup road blowing element, and soup road is blown element and builds in pouring device lower part.The present invention is first to be blown argon gas come the uphill casting method for refining ingot structure using blowing nanoparticle and argon gas, and air in ingot mould is quickly discharged, and nanoparticle is then blown element blowing by soup road under the delivery of carrier gas stream and enters molten steel.Present invention process is easy to operate, it is easy to accomplish, ingot structure can be uniformly refined, the accounting of equiax crystal is increased.
Description
Technical field
The present invention relates to steel ingot casting technology fields more particularly to a kind of use to be blown nanoparticle and argon gas refinement steel ingot
The uphill casting device and method of tissue.
Background technique
Although continuous casting technology is in an increasingly wide range of applications, ingot casting technology rely on its product particularity, electric power,
Still occupy irreplaceable status in the industries such as metallurgy, petrochemical industry, shipbuilding, railway, mine, aerospace, military project.Casting forging product
Economy drive property is by force, radiation effects is big, the far-reaching of influence can not be ignored.
It is cast currently, steel ingot tradition casting process mostly uses directly casting and stands the operating method that natural cooling solidifies
Ingot.The ingot casting sundries content that this operating method obtains is high, soluterich in regional area, so that in the cast ingot product produced
It is larger that segregation phenomena, tissue grain size occur for portion.
Summary of the invention
For overcome the deficiencies in the prior art, the present invention provides a kind of using blowing nanoparticle and argon gas refinement steel ingot group
The uphill casting device and method knitted.Oxide content can be reduced, grain structure is refined, obtain the steel ingot internal soundness cast out bright
It is aobvious to improve.
In order to achieve the above object, the present invention is implemented with the following technical solutions:
A kind of uphill casting device using blowing nanoparticle and argon gas refinement ingot structure, including air supply system, nanoparticle
Sub- separating station, pouring device and Tang Dao are blown original part；The air supply system includes air accumulator and air-flow distributor, nanometer separating station
Including nanoparticle holding vessel and mixing chamber, pouring device includes ingot mould, reflection nozzle brick and casting chassis, the blowing of soup road
Element includes round blowing ring, the blowing of soup road tail brick, inlet pipe connection；
Air accumulator and air-flow distributor separate two gas circuits, wherein the first gas by piping connection from air-flow distributor
Road is connect with nanoparticle holding vessel, and the second gas circuit is connect with mixing chamber, and mixing chamber is blown element with soup road by pipeline and is connected；
Reflection nozzle brick is fixed in ingot mould bottom outlet, and casting chassis is located at ingot mould lower part；Soup road is blown element and builds in reflection water
Mouth brick lower part is fixed in casting chassis.
The pipeline that the air accumulator is connect with air-flow distributor is equipped with air valve, two separated on the air-flow distributor
Gas circuit is respectively arranged with flowmeter and pressure gauge in every gas circuit.
The soup road blowing tail brick of the soup road blowing element is fixed on the casting chassis of pouring device, one end and common soup
Road brick connection, one end with reflection nozzle brick connect, molten steel by common runner brick, soup road blowing tail brick flow through reflect nozzle brick into
Enter ingot mould.
The round ring that is blown of the soup road blowing element is built in the inside that soup road is blown tail brick, divides on the inside of circle blowing ring
It is furnished with the injection hole that diameter is 0.5~2mm, the spacing of adjacent injection hole is 5~20mm, circle blowing ring connection air inlet connection
Pipe, inlet pipe connection are connected by nanometer air delivery tube with mixing chamber, and nanometer air delivery tube is embedded in casting chassis.
A method of using the uphill casting device of blowing nanoparticle and argon gas refinement ingot structure, specifically including following step
It is rapid:
(1) drying nano particle is added in advance in the nanoparticle holding vessel of nanoparticle separating station, opens blowing
The air valve of gas air supply system；After ingot steel casting, molten steel by common runner brick, soup road be blown tail brick flow through reflection nozzle brick into
Enter ingot mould；
(2) it is pressurized by the first gas circuit to nanoparticle holding vessel, is greater than second to the pressure in nanoparticle holding vessel
Airline pressure, and when steel ingot fills type rate and reaches 1/2, open flow controller；Nanoparticle flow is controlled by flow controller,
The nanoparticle of initial gross separation enters in mixing chamber in nanoparticle holding vessel, controls the gas flow and pressure of the second gas circuit
Power makes the entrance nanometer air delivery tube of nanoparticle air-flow safety and stability in mixing chamber；
(3) nanoparticle for entering nanometer air delivery tube is blown element, spray by soup road under the delivery of carrier gas stream
It blows into steel ingot solution, jetting pressure control requires nanoparticle and throughput ratio in 0.5~1.5MPa, blowing process
Less than 1, to the end of steel ingot fills type and the i.e. blowing of ingot tail solidification completion terminates, and closes flow controller, the first gas circuit, air supply system
Air valve.
The blowing gas is argon gas, and blowing amount is the 0.05~0.35% of steel ingot weight.
The nanoparticle of the blowing is ZrO2, Ti2O3, MgS, SiO2, MnS, CaO, CeO2Or Al2O3, having a size of 20~
80nm。
The steel ingot fill type terminate and ingot tail solidification complete i.e. blowing after after, be blown 4V altogether1Gas, injecting velocity
Are as follows:
In formula, V1Tank volume, L are stored for nanoparticle；M2For steel ingot weight, kg；v1For injecting velocity, L/s；v2For casting
Speed, kg/s.
Compared with the conventional method, the beneficial effects of the present invention are:
(1) for the present invention using blowing nanoparticle and argon gas come the method for refining ingot structure, the nanoparticle of penetrating can
Molten steel is all incorporated, increases residence time of the nanoparticle in molten steel, improves the utilization rate of nanoparticle, reduce cost.
(2) before being poured, argon gas is blown tail brick injection hole by the soup road of ingot mould bottom and is constantly blown into ingot mould and feed trumpet
It is interior, the air in ingot mould and feed trumpet can quickly be discharged, avoid molten steel secondary oxidation；After casting, argon gas enters shape in molten steel
At a large amount of Argon Bubble, facilitate in mould in molten steel pernicious gas (such as: N2、O2、H2Deng) and the further floating of field trash it is clear
It removes.
(3) nanoparticle is added in casting process, has the function of promoting heterogeneous forming core and second phase particles, in molten steel
A large amount of nucleation mass points promotion austenite forming cores are provided when solidification, and additional nanoparticle can play the role of pinning crystal boundary simultaneously, reach
To the purpose of refinement cast sturcture's crystal grain.Facilitate to fill the control of type fluidised form simultaneously, mitigates ingotism degree after solidification.
Detailed description of the invention
Fig. 1 is structural representation front view of the invention.
In figure: 1- air accumulator 2- air valve 3- air-flow distributor 4- first pressure gauge 5- second pressure gauge 6- is first-class
Meter 7- third pressure gauge 8- second flowmeter 9- nanoparticle holding vessel 10- casting chassis 11- flow controller 12-
13- nanometers of air delivery tube 14- reflection nozzle brick 15- molten steel 16- ingot mould 17- circles of mixing chamber are blown ring 18- soup
Road is blown the common runner brick of tail brick 19- inlet pipe connection 20-.
Specific embodiment
Specific embodiments of the present invention will be further explained below, but is not intended to limit the scope of the invention:
As shown in Figure 1, the uphill casting device that ingot structure is refined using blowing nanoparticle and argon gas of the invention, including
Air supply system, nanoparticle separating station, pouring device and Tang Dao are blown element.
Wherein the air supply system includes air accumulator 1 and air-flow distributor 3, and air accumulator 1 and air-flow distributor 3 pass through pipe
Road connection is equipped with air valve 2 between air accumulator 1 and air-flow distributor 3, air-flow distributor 3 is equipped with first pressure gauge 4, from air-flow point
Two gas circuits are separated on orchestration 3, every gas is equipped with flowmeter and pressure gauge, wherein the first gas circuit and nanoparticle holding vessel 9 connect
It connects, the first gas circuit is equipped with first flowmeter 6 and second pressure gauge 5, and the second gas circuit connect with mixing chamber 12, sets in the second gas circuit
There are second flowmeter 8 and third pressure gauge 7.
The nanometer separating station includes nanoparticle holding vessel 9 and mixing chamber 12, and nanoparticle holding vessel 9 is located at mixing
12 top of room is connect by flow controller 11 with mixing chamber 12,12 side of mixing chamber and the second air circuit connection, the other side with receive
Rice air delivery tube 13 connects, and the nanometer air delivery tube 13 is connected with the inlet pipe connection 19 of soup road blowing element.
The soup road blowing tail brick 18 is built in 14 lower part of reflection nozzle brick of ingot mould 16, is fixed on casting chassis 10
On.
The pouring device includes ingot mould 16, reflection nozzle brick 14, common runner brick 20 and casting chassis 10, reflection
Nozzle brick 14 is fixed in 16 bottom outlet of ingot mould, is located at soup road and is blown 18 top of tail brick, common runner brick 20 is blown tail with soup road
Brick 18 connects, and casting chassis 10 is located at 16 lower part of ingot mould.Molten steel is blown tail brick 18 and is flowed through instead by common runner brick 20, soup road
Jetting orifice brick 14 enters ingot mould 16.
The soup road blowing element includes round blowing ring 17, the blowing of soup road tail brick 18, inlet pipe connection 19.The spray of soup road
It blows tail brick 18 to be fixed on casting chassis 10, one end is connect with common runner brick 20, and one end is connect with reflection nozzle brick 14.It is round
Blowing ring 17 is built in the inside of soup road blowing tail brick 18, and the blowing that diameter is 0.5~2mm is distributed on the inside of circle blowing ring 17
Hole, the spacing of adjacent injection hole are 5~20mm, and circle blowing ring 17 connects inlet pipe connection 19, and the connection of inlet pipe connection 19 is received
Rice air delivery tube 13, nanometer air delivery tube 13 are embedded in casting chassis 10.
The method for carrying out refining ingot structure using blowing nanoparticle and argon gas using above-mentioned apparatus, according to following step
It is rapid to carry out:
Drying nano particle is added in advance in the nanoparticle holding vessel 9 of nanometer separating station, air supply system is opened
Air valve 2.Steel ingot starts to be poured after 15min, and molten steel 15 is blown tail brick 18 by common runner brick 20, soup road and flows through reflection water
Mouth brick 14 enters ingot mould 16.After liquid level stabilizing, pressurizeed by the first gas circuit to nanoparticle holding vessel 9, to nanoparticle
When pressure in holding vessel 9 is greater than the second airline pressure and fills type rate and reach 1/2, flow controller 11 is opened.Pass through flow control
Device 11 processed controls nanoparticle flow, and the nanoparticle of initial gross separation enters in mixing chamber 12 in nanoparticle holding vessel 9,
The gas flow and pressure for controlling the second gas circuit keep the entrance nanometer air-flow of nanoparticle air-flow safety and stability in mixing chamber 12 defeated
Send pipe 13.Into the nanoparticle agent of nanometer air delivery tube 13, under the delivery of carrier gas stream, element, spray are blown by soup road
It blows into steel ingot molten bath, jetting pressure control requires nanoparticle and argon flow ratio in 0.5~1.5MPa, blowing process
Less than 1, to the end of steel ingot fills type and the i.e. blowing of ingot tail solidification completion terminates, and closes flow controller 11, the first gas circuit, gas supply system
The air valve 2 of system.
Steel material crystal grain is small and thin, and toughness, intensity also can be higher.Therefore refinement crystal grain is to realize steel material
Both strong and tough important effective method.Nanoparticle appropriate is added in Casting Ingot Solidification Process, can not only play heterogeneous
The effect of forming core and second phase particles can also provide a large amount of nucleation mass points in solidification of molten steel, promote a large amount of of casting crystal
Forming core improves nucleation rate and inhibits grain growth rate, achievees the purpose that refinement casting grain structure.
For the present invention using blowing nanoparticle and argon gas come the method for refining ingot structure, the nanoparticle of penetrating can be whole
Molten steel is incorporated, increases residence time of the nanoparticle in molten steel, improves the utilization rate of nanoparticle, reduce cost.Before casting,
Argon gas is blown 18 injection hole of tail brick by the soup road of ingot mould bottom to be constantly blown into ingot mould and feed trumpet, ingot can quickly be discharged
Air in mould and feed trumpet avoids molten steel secondary oxidation；After casting, argon gas, which enters in molten steel, forms a large amount of Argon Bubble, has
Help the further floating of pernicious gas (such as: N2, O2, H2) and field trash removing in molten steel in mould.Add in casting process
Enter nanoparticle, have the function of promoting heterogeneous forming core and second phase particles, a large amount of nucleation mass points are provided in solidification of molten steel and are promoted
Into austenite forming core, additional nanoparticle can play the role of pinning crystal boundary simultaneously, reach the mesh of refinement cast sturcture's crystal grain
's.Facilitate to fill the control of type fluidised form simultaneously, mitigates ingotism degree after solidification.Present invention process is easy to operate, is easy to real
It is existing, ingot structure can be uniformly refined, the accounting of equiax crystal is increased.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (4)
1. a kind of uphill casting device using blowing nanoparticle and argon gas refinement ingot structure, which is characterized in that be including gas supply
System, nanoparticle separating station, pouring device and Tang Dao are blown element；The air supply system includes air accumulator and air-flow distributor,
Nanoparticle separating station includes nanoparticle holding vessel and mixing chamber, and nanoparticle holding vessel is located at mixing chamber top, passes through stream
Amount controller is connect with mixing chamber, and pouring device includes ingot mould, reflection nozzle brick and casting chassis, and soup road is blown element packet
Include round blowing ring, the blowing of soup road tail brick, inlet pipe connection；
Air accumulator and air-flow distributor separate two gas circuits by piping connection from air-flow distributor, wherein the first gas circuit with
The connection of nanoparticle holding vessel, the second gas circuit are connect with mixing chamber, and mixing chamber is blown element with soup road by pipeline and is connected；Reflection
Nozzle brick is fixed in ingot mould bottom outlet, and casting chassis is located at ingot mould lower part；Soup road is blown element and builds in reflection nozzle brick
Lower part is fixed in casting chassis；
The soup road blowing tail brick of the soup road blowing element is fixed on the casting chassis of pouring device, one end and common runner brick
Connection, one end are connect with reflection nozzle brick, and molten steel flows through reflection nozzle brick by common runner brick, soup road blowing tail brick and enters steel
Ingot mould.
2. a kind of uphill casting device using blowing nanoparticle and argon gas refinement ingot structure according to claim 1,
It is characterized in that, the pipeline that the air accumulator is connect with air-flow distributor is equipped with air valve, two separated on the air-flow distributor
Branch gas circuit is equipped with flowmeter and pressure gauge in every gas circuit.
3. a kind of uphill casting device using blowing nanoparticle and argon gas refinement ingot structure according to claim 2,
It is characterized in that, the round inside for being blown ring and being built in soup road blowing tail brick of the soup road blowing element, on the inside of circle blowing ring
The injection hole that diameter is 0.5 ~ 2mm is distributed with, the spacing of adjacent injection hole is 5 ~ 20mm, circle blowing ring connection air inlet connection
Pipe, inlet pipe connection are connected by nanometer air delivery tube with mixing chamber, and nanometer air delivery tube is embedded in casting chassis.
4. a kind of method using blowing nanoparticle and argon gas refinement ingot structure based on claim 3 described device,
It is characterized in that, specifically comprises the following steps:
(1) drying nano particle is added in advance in the nanoparticle holding vessel of nanoparticle separating station, opens air supply system
Air valve；After ingot steel casting, molten steel flows through reflection nozzle brick by common runner brick, soup road blowing tail brick and enters ingot mould；
The nanoparticle of blowing is ZrO2、Ti2O3、MgS、SiO2、MnS、CaO、CeO2Or Al2O3, having a size of 20 ~ 80nm；
(2) it is pressurized by the first gas circuit to nanoparticle holding vessel, is greater than the second gas circuit to the pressure in nanoparticle holding vessel
Pressure, and when steel ingot fills type rate and reaches 1/2, open flow controller；Nanoparticle flow, nanometer are controlled by flow controller
The nanoparticle of initial gross separation enters in mixing chamber in particle holding vessel, controls the gas flow and pressure of the second gas circuit,
Make the entrance nanometer air delivery tube of nanoparticle air-flow safety and stability in mixing chamber；
(3) enter nanometer air delivery tube nanoparticle, under the delivery of carrier gas stream, by soup road be blown element, be blown into
Enter in steel ingot melt, jetting pressure control requires nanoparticle to be less than with throughput ratio in 0.5 ~ 1.5MPa, blowing process
1, to the end of steel ingot fills type and the i.e. blowing of ingot tail solidification completion terminates, and closes flow controller, the first gas circuit, the gas of air supply system
Valve；
The steel ingot fill type terminate and ingot tail solidification complete i.e. blowing after, be blown 4 altogetherV 1 Gas, injecting velocity are as follows:
In formula,V 1 Tank volume, L are stored for nanoparticle；M 2 For steel ingot weight, kg；v 1 For injecting velocity, L/s；v 2 For poring rate,
kg/s。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710984167.XA CN107737907B (en) | 2017-10-20 | 2017-10-20 | Using the uphill casting device and method of blowing nanoparticle and argon gas refinement ingot structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710984167.XA CN107737907B (en) | 2017-10-20 | 2017-10-20 | Using the uphill casting device and method of blowing nanoparticle and argon gas refinement ingot structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107737907A CN107737907A (en) | 2018-02-27 |
| CN107737907B true CN107737907B (en) | 2019-10-01 |
Family
ID=61237917
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710984167.XA Active CN107737907B (en) | 2017-10-20 | 2017-10-20 | Using the uphill casting device and method of blowing nanoparticle and argon gas refinement ingot structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107737907B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50102531A (en) * | 1974-01-17 | 1975-08-13 | ||
| JPS54110118A (en) * | 1978-02-17 | 1979-08-29 | Hitachi Ltd | Treating method for molten metal |
| JPS6038220B2 (en) * | 1980-01-11 | 1985-08-30 | 川崎製鉄株式会社 | How to reduce hydrogen in steel |
| EP0436465A1 (en) * | 1989-12-20 | 1991-07-10 | Alusuisse-Lonza Services Ag | Refining of molten metal |
| CN2861175Y (en) * | 2005-12-13 | 2007-01-24 | 东北大学 | Slit-type ladle bottom blowing power injection apparatus |
| CN1962886A (en) * | 2006-11-23 | 2007-05-16 | 中冶华天工程技术有限公司 | Alloying fine adjustment method |
| CN101509052A (en) * | 2009-03-27 | 2009-08-19 | 东北大学 | Deoxidization, acieration and alloying bottom blowing powder-spraying method for LF furnace |
| CN104561452A (en) * | 2015-01-16 | 2015-04-29 | 东北大学 | Device and method for single snorkel vacuum degassing refining of molten steel by employing bottom injection |
| CN205147262U (en) * | 2015-10-23 | 2016-04-13 | 辽宁科技大学 | End argon blowing device of static ingot |
-
2017
- 2017-10-20 CN CN201710984167.XA patent/CN107737907B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50102531A (en) * | 1974-01-17 | 1975-08-13 | ||
| JPS54110118A (en) * | 1978-02-17 | 1979-08-29 | Hitachi Ltd | Treating method for molten metal |
| JPS6038220B2 (en) * | 1980-01-11 | 1985-08-30 | 川崎製鉄株式会社 | How to reduce hydrogen in steel |
| EP0436465A1 (en) * | 1989-12-20 | 1991-07-10 | Alusuisse-Lonza Services Ag | Refining of molten metal |
| CN2861175Y (en) * | 2005-12-13 | 2007-01-24 | 东北大学 | Slit-type ladle bottom blowing power injection apparatus |
| CN1962886A (en) * | 2006-11-23 | 2007-05-16 | 中冶华天工程技术有限公司 | Alloying fine adjustment method |
| CN101509052A (en) * | 2009-03-27 | 2009-08-19 | 东北大学 | Deoxidization, acieration and alloying bottom blowing powder-spraying method for LF furnace |
| CN104561452A (en) * | 2015-01-16 | 2015-04-29 | 东北大学 | Device and method for single snorkel vacuum degassing refining of molten steel by employing bottom injection |
| CN205147262U (en) * | 2015-10-23 | 2016-04-13 | 辽宁科技大学 | End argon blowing device of static ingot |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107737907A (en) | 2018-02-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104057097A (en) | Dual-ring supersonic atomizer | |
| CN202490928U (en) | Extended nozzle device capable of eliminating inclusions for tundish | |
| CN206605009U (en) | Annular cast running gate system | |
| CN102527943A (en) | Overhead choke-flow filter buffer type casting pouring technological method | |
| WO2021012201A1 (en) | Pneumatic swirling flow tundish for continuous casting | |
| CN207823871U (en) | A kind of 2500LB valves running gate system | |
| CN201470880U (en) | Argon shielding device for casting of die casting | |
| CN111451462B (en) | Method for refining solidification structure of continuous casting billet by utilizing submerged nozzle to spray magnesium powder | |
| CN107737907B (en) | Using the uphill casting device and method of blowing nanoparticle and argon gas refinement ingot structure | |
| CN102211154B (en) | Method for improving internal quality of continuous casting and submerged nozzle for implementing method | |
| CN209736576U (en) | Novel rotational flow downward casting device | |
| CN209379873U (en) | A kind of bottom filling purifying smelting device | |
| CN204724802U (en) | Based on the belt pulley blank casting mould of symmetric form ingate | |
| CN204504171U (en) | A kind of cooling device of fountain Water cooling centrifugal pipe caster | |
| CN205217993U (en) | A the gating system for discoid foundry goods | |
| CN203437639U (en) | Improved type tundish water opening | |
| CN201067795Y (en) | Vacuum induction smelting steel ingot casting component | |
| JP2009090303A (en) | Low-pressure casting apparatus and low-pressure casting method | |
| CN213856964U (en) | Argon blowing stream inoculation device for large nodular cast iron cylinder | |
| CN107716884A (en) | A kind of new thin strap continuous casting cloth flowing water mouth | |
| CN202877536U (en) | Steel ladle sliding water gap used for cleaning steal | |
| CN103934445A (en) | Cooling device for submersed nozzle | |
| CN202621864U (en) | Continuous casting ladle protection sleeve | |
| CN204934581U (en) | A kind of for anti-nitrogen pick-up protection tube during pouring molten steel | |
| CN110653377A (en) | Gas-water coupling preparation method of metastable silicon brass particles |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |