CN201880912U - Collector nozzle brick for steel casting - Google Patents
Collector nozzle brick for steel casting Download PDFInfo
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- CN201880912U CN201880912U CN2010202858264U CN201020285826U CN201880912U CN 201880912 U CN201880912 U CN 201880912U CN 2010202858264 U CN2010202858264 U CN 2010202858264U CN 201020285826 U CN201020285826 U CN 201020285826U CN 201880912 U CN201880912 U CN 201880912U
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- molten steel
- river
- nozzle brick
- collector nozzle
- mouth
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Abstract
The utility model relates to improvement for a collector nozzle brick for steel casting, characterized in that a hollow air chamber communicated with an outer air supply is arranged in a collector nozzle thickness and a plurality of air blowing channels communicated with the air chamber are distributed on the inner wall surface of a core hole of the collector nozzle. The flowing-down molten steel forms into the rain-like shaped liquid drops during the falling process and falls into an ingot mold. The molten steel dispersing in the rain shape makes the harmful gas in the molten steel overflow and furthermore the harmful gas is discharged at the optimal state and the collector nozzle brick is used to cast the ingot and basically no shrink hole is found out. The collector nozzle blows the inert gas, the control is simply and easily realized without adding the additional apparatus. The air chamber and a blowing channel communicated with the gas chamber are arranged in the collector nozzle thickness, thus the structure is simple, the production is convenient and the manufacture technology of the collector nozzle are basically not changed. Compared with the prior technology, the 'gas suction or reaction agent' is added into the molten steel and the gas is discharged out by the physical method, the reactant impurity is not generated and the new pollution is not generated.
Description
Technical field
Utility model is to the improvement of iron and steel mold cast with lower nozzle brick, relate in particular to a kind of can the realization " formula drenches with rain " casting, further pernicious gas in cleaning molten steel, the discharge molten steel reduces pernicious gas and remains in the iron and steel cast lower nozzle brick that forms shrinkage cavity defect in the steel ingot.
Background technology
In order to obtain high-quality clean molten steel, way is to add composite refiner in vacuum drying oven usually, makes deoxidation products and field trash in the molten steel form liquid phase come-up and removal.Adopt the vacuum external refining in addition, do not adopt tundish and covering slag, make refractory material and melt cinder etc. be reduced to minimum level or the like the pollution of molten steel.But all measures all can not solve the influence that ingot quality is produced that is mingled with of pernicious gas, have harmful gas residue in the molten steel, can cause forming in steel ingot shrinkage cavity defect.In addition, for preventing the secondary oxidation in the molten steel casting process, also adopt vacuum casting, vacuum casting only is and isolate from outer air to get rid of pernicious gas in the molten steel.
People are for reducing pernicious gas in the molten steel, and same more employing is similar takes off assorted method.Removed by adding auxiliary agent, for example:
Chinese patent CN1693487 deoxidation agent for purifying molten steel, the pernicious gas in the molten steel can be effectively removed in adding, and oxygen content can be reduced to below the 20ppm, and cleaning molten steel improves the qualification rate of product effectively.
Chinese patent CN1786202 smelting iron and steel carbonaceous pelletizing, adding in the molten steel can not only carburetting, and can reduce steel inclusion, and remove pernicious gas, and can purify crystal boundary, crystal grain thinning, thus improve the toughness of steel.
Chinese patent CN1329174 agent for purifying molten steel and cleaning molten steel method, join below the molten steel the cleanser frit made from bell jar plunging or ladle bottom pouring process, realize deoxidation from bottom to top, desulfurization, degasification, removal non-metallic inclusion.
Adopt and add various cleansers, deoxidier chemical treatment method removal gaseous impurity method, though can remove some pernicious gas impurity, yet because the adding of cleanser, deoxidier, when purifying the removal gaseous impurity, certainly lead to chemical reaction product, there is the quality that also must influence molten steel in these product, and this method has also increased cost simultaneously.
Chinese patent CN1434135 casting and pouring is with little ladle blowing purification method and apparatus.In bag, be blown into inert gas in the molten steel by being arranged on molten steel bag bottom blowing device, reduce pernicious gas and impurity in the liquid metals with this.Be blown into inert gas by ladle bottom, its effect be make molten steel form " seething " thus effect makes that bag end slag is floating to be removed to liquid level, " seethe " simultaneously subsidiaryly to disengage portion gas, so exhaust is difficult to thoroughly.
Chinese patent CN101602104 tundish and use this tundish to remove the nonmetal impurities method, one air curtain barricade wall is set in tundish, be blown into the argon gas disperse by air curtain barricade wall in the molten steel and become bubble, the pernicious gases such as N, O in the absorption molten steel reduce the content of these elements in the molten steel; Bubble floating plays and stirs the molten steel effect simultaneously, takes up inorganic non-metallic field trashes such as oxide in the molten steel, nitride, sulfide, silicate, makes them by the absorption of the slag charge of molten steel face, and the cleanliness factor of molten steel further improves.This method is ditto the same, is blown into the argon gas exhaust and is difficult to thoroughly in molten steel, and next adopts tundish and covering slag has increased refractory material and melt cinder pollutes molten steel, and easily produces secondary impurities.
Above-mentioned deficiency still has is worth improved place.
The utility model content
The utility model purpose is to overcome above-mentioned the deficiencies in the prior art, provides a kind of and does not produce any accessory substance by physical means, and the simple and effective high-quality of energy is got rid of the iron and steel cast lower nozzle brick of pernicious gas in the molten liquid steel.
The utility model purpose realizes, the main improvement is by casting nozzle in the following mouth of a river insufflation channel to be set, the dirty molten steel of casting is dispelled the harmless inert gas of molten steel by the following mouth of a river, realize " formula drenches with rain " diffusing whereabouts of drenching, pernicious gas is overflowed obtain getting rid of, the cleanliness factor of molten steel is further enhanced, thereby has overcome the deficiencies in the prior art, realizes the utility model purpose.Specifically, lower nozzle brick is used in the cast of utility model iron and steel, comprises mouth of a river body down, it is characterized in that in the thickness of the mouth of a river hollow gas chamber that is communicated with outer air feed being arranged down, and following mouth of a river blowhole internal face is distributed with the insufflation channel of a plurality of connection air chambers.
Utility model is said:
Hollow gas chamber in the wall thickness of the following mouth of a river is mainly used in to each insufflation channel air feed, and each insufflation channel is directly outer to connect air feed to simplify, and even each insufflation channel blow gas pressure.Consider down that mouth of a river dimension volume is less, and lower nozzle brick thickness is limited, from both helping improving the air blowing uniformity, avoid loopful shape hollow gas chamber to influence intensity again, a kind of better is that hollow gas chamber is two sections or three sections arcuate structures, each section arc air chamber is outer respectively to connect air feed, and connects some insufflation channel, for example is no less than 3.According to following mouth of a river size, insufflation channel design quantity difference, an optimum principle is that better inner peripheral surface distribution is the smaller the better at interval, can better improve to dispel uniformity.
Each insufflation channel outlet of side face, a kind of better outlet is roughly in the isoplanar, and not deflection of shape molten steel helps drenching with rain; Wherein be more preferably the gas outlet and be positioned at bottom, the mouth of a river down, for example descend most outlet in mouth of a river outlet 3-8cm, winding-up closely more helps dispelling molten steel from tapping hole like this, and pernicious gas overflows.
Insufflation channel, a kind of being preferably adopted the clear opening structure, and both convenient the making can reduce the resistance of blowing again; It is tilting downwards that straight-through insufflation channel better is, and falls to the easier formation of the declivity spray formula that drenches with rain, and wherein gradient can be 15～85 degree, wherein 30-50 degree more preferably.The aperture of each straight-through passage is preferably 1～5mm, and this pore diameter range has and better dispels effect.Insufflation channel, a kind of more preferably have several layers up and down, can molten steel be dispersed to be the formula that drenches with rain.
Utility model is said to the harmless inert gas of molten steel, known to the technical staff, and for example argon gas, nitrogen, neon, this belongs to prior art.
Consider that the whereabouts molten steel disperses because of winding-up forms, disperse molten steel contraction injection mold die orifice for conveniently making, a kind of better mode is that down mold mouth top, below, the mouth of a river (between the following mouth of a river and mold mouth) is provided with anti-molten steel and to the free of contamination substantially collector ring of molten steel, for example the graphite collector ring.Because casting is to carry out,, also can omit collector ring by regulating vacuum, molten steel down-off etc. in vacuum chamber.
Yet, be to be understood that the technical staff passes through the understanding to technical solution of the present invention, the molten steel of realizing causing to fall and break is the shape that drenches with rain, and not exclusive have only adopt down winding-up inert gas in the mouth of a river to realize, just jet at other positions with respect to dirty molten steel, position, the following mouth of a river is better.
The utility model lower nozzle brick, by to falling by the molten steel winding-up inert gas harmless to molten steel, control dirty molten steel flow simultaneously, and winding-up tolerance, gas speed, can make dirty molten steel in dropping process, form the similar shape droplets fall that drenches with rain and inject ingot mould, disperse and be the shape whereabouts molten steel that drenches with rain and pernicious gas in the molten steel overflowed obtain getting rid of, reach the optimum pernicious gas in the molten steel of getting rid of, avoid pernicious gas to be mixed in and form shrinkage cavity defect in the teeming, through the real contrast test of watering, adopt utility model lower nozzle brick teeming flaw detection not find shrinkage cavity substantially.And following mouth of a river winding-up inert gas, control is simple to be realized easily, simultaneously because of under the mouth of a river more near casting gate, be difficult for causing the new ambient atmos that entrainments, and also need do not increase auxiliary device.The winding-up passage of air chamber and connection is set in the wall thickness of the following mouth of a river, simple in structure, easy to make, do not change mouth of a river manufacturing process down substantially.Downward-sloping straight-through injection hole, and evenly being provided with in winding-up orifice ring week, the Exit to all routes is substantially flush, and outlet is arranged on down bottom, the mouth of a river, molten steel is formed evenly drench with rain the formula whereabouts easilier.Adopt adding " air-breathing or reactant " in molten steel than prior art, the physical method exhaust does not produce reactant impurity, can not cause new pollution.
Optimize specific embodiment below in conjunction with one; utility model essence is further understood in exemplary illustration and help; but the embodiment detail only is for utility model is described; do not represent utility model design whole technical schemes down; therefore should not be construed as the total technical scheme of utility model is limited; some are In the view of the technical staff; the unsubstantiality that does not depart from the utility model design increases and/or change; for example change or replace, all truely use novel protected scope so that technical characterictic with same or similar technique effect is simple.
Description of drawings
Fig. 1 is the utility model formula casting lower nozzle brick structural representation of realizing drenching with rain.
Fig. 2 is the formula casting schematic diagram that drenches with rain.
The specific embodiment
Embodiment: referring to Fig. 1,2, the present invention realizes that the molten steel formula that drenches with rain falls to using the mouth of a river 4 down, and shape and structure, size are with the mouth of a river under the prior art of same size.There is the annular of certain altitude to be communicated with air chamber 1 (also can be to be interrupted two to three segmental arcs) in the wall thickness of bottom, the following mouth of a river, air chamber 1 is communicated with outer air supply pipe 3, following mouth of a river blowhole inner peripheral surface be evenly distributed with some alternate, up and down 4 layers a plurality of downward-sloping 45 the degree straight-through airways 2, the airway air inlet is communicated with air chamber with annular and is communicated with, plane, each layer gas outlet is substantially flush, the orlop gas outlet is near mouth of a river outlet down, for example apart from exit end face 3-5cm.
During cast, by prior art vacuum pouring mode, tundish 5 belows connect the mouth of a river 4 under the embodiment by sled mechanism, and there is the graphite guide ring 6 of graphite guide ring support 7 location below, the following mouth of a river, and the guide ring below is an ingot mould 8.Tundish 5 bottoms to ingot mould 8 is arranged in the vacuum chamber 9.When watering steel, be blown into the 0.2-0.3Mpa argon gas by air inlet pipe 3, the molten steel that causes to fall and break is " formula drenches with rain ", compiles by the graphite guide ring and injects ingot mould 8.
To those skilled in the art; under this patent design and specific embodiment enlightenment; some distortion that can directly derive or associate from this patent disclosure and general knowledge; those of ordinary skills will recognize also can adopt additive method; or the substituting of known technology commonly used in the prior art; and the mutual various combination between feature; the for example change of ring-shaped air chamber and gas hole; or the like unsubstantiality change; can be employed equally; can both realize this patent representation function and effect, launch for example no longer one by one to describe in detail, all belong to this patent protection domain.
Be the convenience on describing, the described nozzle brick of utility model and the following mouth of a river are synonym.
Claims (8)
1. lower nozzle brick is used in the iron and steel cast, comprises mouth of a river body down, it is characterized in that in the thickness of the mouth of a river hollow gas chamber that is communicated with outer air feed being arranged down, and following mouth of a river blowhole internal face is distributed with the insufflation channel of a plurality of connection air chambers.
2. lower nozzle brick is used in described iron and steel cast according to claim 1, it is characterized in that insufflation channel has several layers up and down, and each layer outlet is substantially flush.
3. lower nozzle brick is used in described iron and steel cast according to claim 1, it is characterized in that insufflation channel in following lower end, the mouth of a river, the approaching mouth of a river exit end face down of orlop outlet.
4. lower nozzle brick is used in described iron and steel cast according to claim 1, it is characterized in that insufflation channel is downward tilting straight channel.
5. lower nozzle brick use in cast according to the described iron and steel of claim 4, it is characterized in that insufflation channel issues oblique 15～85 downwards and spend.
6. lower nozzle brick use in cast according to the described iron and steel of claim 5, it is characterized in that insufflation channel issues oblique 30～50 downwards and spend.
7. lower nozzle brick is used in described iron and steel cast according to claim 1, it is characterized in that each insufflation channel aperture is 1～5mm.
8. lower nozzle brick is used in described iron and steel cast according to arbitrary claim in the claim 1 to 7, it is characterized in that insufflation channel evenly distributes at following mouth of a river inner peripheral surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202858264U CN201880912U (en) | 2010-08-05 | 2010-08-05 | Collector nozzle brick for steel casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202858264U CN201880912U (en) | 2010-08-05 | 2010-08-05 | Collector nozzle brick for steel casting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201880912U true CN201880912U (en) | 2011-06-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202858264U Expired - Fee Related CN201880912U (en) | 2010-08-05 | 2010-08-05 | Collector nozzle brick for steel casting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201880912U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101905319A (en) * | 2010-08-05 | 2010-12-08 | 宜兴市耐火材料有限公司 | Steel pouring procedure and lower nozzle brick |
| CN102489679A (en) * | 2011-12-29 | 2012-06-13 | 上海宝明耐火材料有限公司 | Anti-blocking water feeding port with low air permeability |
| CN108859014A (en) * | 2018-07-23 | 2018-11-23 | 王天强 | Spary coating type pouring head |
-
2010
- 2010-08-05 CN CN2010202858264U patent/CN201880912U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101905319A (en) * | 2010-08-05 | 2010-12-08 | 宜兴市耐火材料有限公司 | Steel pouring procedure and lower nozzle brick |
| CN102489679A (en) * | 2011-12-29 | 2012-06-13 | 上海宝明耐火材料有限公司 | Anti-blocking water feeding port with low air permeability |
| CN108859014A (en) * | 2018-07-23 | 2018-11-23 | 王天强 | Spary coating type pouring head |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110629 Termination date: 20190805 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |