CN207294829U - A kind of molten steel feeds silk protective device - Google Patents
A kind of molten steel feeds silk protective device Download PDFInfo
- Publication number
- CN207294829U CN207294829U CN201721300001.3U CN201721300001U CN207294829U CN 207294829 U CN207294829 U CN 207294829U CN 201721300001 U CN201721300001 U CN 201721300001U CN 207294829 U CN207294829 U CN 207294829U
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- protective cover
- molten steel
- steel
- calcium
- argon gas
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- Treatment Of Steel In Its Molten State (AREA)
Abstract
It the utility model is related to a kind of molten steel and feed silk protective device, belong to steelmaking equipment technical field.Technical solution is：Include protective cover（1）, argon gas playpipe（2）, air dispelling hole（4）, hang handle（5）, feed calcium conduit（6）And steel ladle（7）, protective cover（1）For disc-shaped structure, protective cover（1）It is equipped with argon gas playpipe（2）, air dispelling hole（4）With hello calcium conduit（6）, protective cover（1）Cover in steel ladle（7）On, hang handle（5）It is fixed on protective cover（1）On.The argon gas being passed through can discharge the air of steel ladle upper space, and molten steel largely get up and fall into again in the molten steel of ladle after secondary oxidation by exposed secondary oxidation or molten steel splash when avoiding feeding calcium.The beneficial effects of the utility model are：The recovery rate of calcium can improve 5%, and the steel plate inspection qualification rate for needing Calcium treatment of production improves more than 30%, Al2O3 the and MnS field trashes of high-melting-point strip are greatly decreased in steel plate, have prevented the mouth of a river and have stopped up accident.
Description
Technical field
It the utility model is related to a kind of molten steel and feed silk protective device, belong to metallurgy industry steelmaking equipment technical field.
Background technology
In steelmaking process, aluminium deoxidation is widely used, aluminate majority fusing point present in steel is very high, in continuous casting
At a temperature of be in solid-state, it is easy at middle water containing opening build up cause blocking.And remain in the high-melting-point strip Al2O3 in steel
Field trash is in hard brittleness compared with the matrix of steel, is easy to be broken in the operation of rolling and to prolong rolling direction continuously distributed, from
And cause the defects of serious.
The form of aluminium deoxidation product can be controlled by Calcium treatment, it is in a liquid state at a temperature of steel-making continuous casting, can be made
Substantial amounts of such deoxidation products floats before tundish is entered from molten steel to be removed, and can not only be reduced middle water containing opening and be blocked up
Plug, ensures being smoothed out for continuous casting, but also can increase the cleannes of steel, improves the quality of steel.On the other hand, the folder in steel
Debris MnS is different from the physical property such as coefficient of expansion of steel matrix, caused by gap easily become stress corrosion cracking source, lead
Cause formation etc. of etch pit, the caused easy housing hydrogen in gap, becomes the trap of hydrogen, increases the sensitiveness of hydrogen induced cracking.Molten steel leads to
Calcium treatment is crossed, low melting point can be become and removal of floating to high-melting-point strip Al2O3 inclusion conditionings, or it becomes balling-up
Shape, can also reduce field trash MnS.But since the fusing point of calcium is low（838℃）, boiling point is also low（1450℃）, add meeting after molten steel
Gasify quickly.The deoxidizing capacity of calcium is extremely strong, and with the oxygen in steel and oxide intense reaction can occur for feeding molten steel, cause molten steel,
Slag splash, and if air contact, secondary oxidation of steel is easily caused, influences steel quality, while the recovery rate of calcium also reduces.
Due to molten steel splash, feed calcium conduit and be easily adhered the steel splash, influence to feed the access times of calcium conduit.
Utility model content
The utility model aim is to provide a kind of molten steel and feeds silk protective device, it is possible to increase the recovery rate of calcium, avoids dendrite
The formation of shape MnS, solves the problems, such as present in background technology.
The technical solution of the utility model is：
A kind of molten steel feed silk protective device, comprising protective cover, argon gas playpipe, air dispelling hole, hang handle, feed calcium conduit and molten steel
Bag, protective cover are disc-shaped structure, and protective cover is equipped with argon gas playpipe, air dispelling hole and feeds calcium conduit, and protective cover is in molten steel
Wrap, hang handle and be fixed on protective cover.
Air dispelling hole on the protective cover is located at the center of protective cover, and the argon gas playpipe on protective cover is close to protection
The edge of cover.
Argon gas playpipe and hello calcium conduit on the protective cover are through protective cover with being connected inside steel ladle.
Argon gas playpipe on the protective cover is to be in tilted layout.
The handle that hangs is inverted U-shaped structure.
The utility model is used, in use, argon gas playpipe then first is passed through argon by protective cover handling to steel ladle
Gas, Argon begin through after 2 minutes and feed calcium conduit feeding calcium line, fed calcium line, stopping is passed through argon gas.
The argon gas being passed through can discharge the air of steel ladle upper space, molten steel a large amount of exposed secondary oxidation when avoiding feeding calcium
Or molten steel splash is got up and is fallen into again in the molten steel of ladle after secondary oxidation.Protected by argon gas, the calcium in steel is effectively controlled
System, recovery rate are stablized, and on the one hand promote high-melting-point strip Al2O3 field trashes to form liquid with CaO and float, on the other hand,
Ca and MnS react, generally generate spherical or bulk CaS or（Ca、Mn）S, avoids the formation of dendritic crystalline MnS, reduces hydrogen cause
The sensitiveness of crackle.
The beneficial effects of the utility model are：The recovery rate of calcium can improve 5%, and the steel plate for needing Calcium treatment of production is visited
Hinder qualification rate and improve more than 30%, Al2O3 the and MnS field trashes of high-melting-point strip are greatly decreased in steel plate, improve steel plate matter
Amount, has prevented the mouth of a river and has stopped up accident.
Brief description of the drawings
Fig. 1 is the utility model front view；
Fig. 2 is the utility model top view；
In figure：Protective cover 1, argon gas playpipe 2, guide hole 3, air dispelling hole 4, hang handle 5, feed calcium conduit 6, steel ladle 7, molten steel
8。
Embodiment
Below in conjunction with attached drawing, by example, the utility model is described in further detail.
Referring to the drawings 1,2, a kind of molten steel feeds silk protective device, comprising protective cover 1, argon gas playpipe 2, air dispelling hole 4, hangs handle
5th, calcium conduit 6 and steel ladle 7 are fed, protective cover 1 is disc-shaped structure, and protective cover 1 is equipped with argon gas playpipe 2, air dispelling hole 4 and feeds
Calcium conduit 6, protective cover 1 are covered in steel ladle 7, are hung handle 5 and are fixed on protective cover 1.
In the present embodiment, the housing diameter of steel ladle 7 is 3400mm, and protective cover 1 is made by the steel plate that thickness is 40mm,
A diameter of 3600mm, air dispelling hole 4 are located at the center of protective cover 1, its a diameter of 800mm, 3 distance protection cover center of guide hole
800mm, diameter 300mm, the length of argon gas playpipe 2 are 300mm, the center line of argon gas playpipe 2 with the horizontal 60o angles,
The center 1200mm of distance protection cover 1.It is inverted U-shaped structure to hang handle 5, is welded on the middle part of protective cover 1, facilitates handling.
In use, the argon gas playpipe 2 on protective cover 1 is first connected into argon gas by near 1 handling of protective cover to steel ladle 7
Pipeline, is put into steel ladle 7, starts to be passed through argon gas, then will feed calcium conduit 6 be inserted into from guide hole 3, make feed calcium conduit 6 away from
From the liquid steel level 400-800mm in steel ladle 7, Argon starts to feed calcium line, has fed calcium line after 2 minutes, stops spraying from argon gas
Penetrate pipe 2 and be passed through argon gas.
Using the utility model, 100t steel ladle can reduce products outside the plan 1000t every year, reduce 1,000,000 yuan of loss with
On.
Claims (5)
1. a kind of molten steel feeds silk protective device, it is characterised in that includes protective cover（1）, argon gas playpipe（2）, air dispelling hole（4）, hang
Handle（5）, feed calcium conduit（6）And steel ladle（7）, protective cover（1）For disc-shaped structure, protective cover（1）It is equipped with argon gas playpipe
（2）, air dispelling hole（4）With hello calcium conduit（6）, protective cover（1）Cover in steel ladle（7）On, hang handle（5）It is fixed on protective cover（1）On.
2. a kind of molten steel according to claim 1 feeds silk protective device, it is characterised in that the protective cover（1）On air-dispersing
Hole（4）Positioned at protective cover（1）Center, protective cover（1）On argon gas playpipe（2）Close to protective cover（1）Edge.
3. a kind of molten steel according to claim 1 or 2 feeds silk protective device, it is characterised in that the protective cover（1）On
Argon gas playpipe（2）With hello calcium conduit（6）Through protective cover（1）With steel ladle（7）Inside connection.
4. a kind of molten steel according to claim 1 or 2 feeds silk protective device, it is characterised in that the protective cover（1）On
Argon gas playpipe（2）To be in tilted layout.
5. a kind of molten steel according to claim 1 feeds silk protective device, it is characterised in that described to hang handle（5）For inverted U knot
Structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721300001.3U CN207294829U (en) | 2017-10-10 | 2017-10-10 | A kind of molten steel feeds silk protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721300001.3U CN207294829U (en) | 2017-10-10 | 2017-10-10 | A kind of molten steel feeds silk protective device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207294829U true CN207294829U (en) | 2018-05-01 |
Family
ID=62414860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721300001.3U Active CN207294829U (en) | 2017-10-10 | 2017-10-10 | A kind of molten steel feeds silk protective device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207294829U (en) |
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2017
- 2017-10-10 CN CN201721300001.3U patent/CN207294829U/en active Active
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