CN209139785U - A kind of slag adding machine - Google Patents
A kind of slag adding machine Download PDFInfo
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- CN209139785U CN209139785U CN201821597443.3U CN201821597443U CN209139785U CN 209139785 U CN209139785 U CN 209139785U CN 201821597443 U CN201821597443 U CN 201821597443U CN 209139785 U CN209139785 U CN 209139785U
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- slag
- conveyance conduit
- tundish
- crystallizer
- adding machine
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Abstract
The utility model discloses a kind of slag adding machines; including the slag ladle for holding covering slag and the conveyance conduit for conveying the covering slag to crystallizer; one end of the conveyance conduit is connected with the slag ladle; the other end is connected with the crystallizer; the conveyance conduit is equipped with operated pneumatic valve; tundish is equipped with above the crystallizer; the middle section of the conveyance conduit extends to the top of the Metal in Tundish, and the Metal in Tundish heats the covering slag in the conveyance conduit using molten steel radiation heat.Using the slag adding machine of the utility model, own temperature of the covering slag before the molten steel surface that crystallizer is added can be promoted using the radiant heat of molten steel in tundish.
Description
Technical field
The utility model relates to continuous casting of iron and steel fields, in particular to a kind of slag adding machine.
Background technique
Covering slag is a kind of steel-making auxiliary functional material for being covered on molten steel surface in steel making working procedure conticaster crystallizer,
It has adiabatic heat-insulation, prevent molten steel oxidation, absorb float in molten steel be mingled with, lubricate between copper plate of crystallizer and slab opposite transport
The multiple functions such as dynamic and Heat Transfer Control are last one of technical factors of steelmaking process control cc billet surface quality.
The fusion temperature of covering slag usually at 900~1200 DEG C, gradually melts, in molten steel under the high temperature action of molten steel
Surface from top to bottom forms slag layer, sinter layer and liquid slag layer three-decker, slag layer and mainly plays a part of adiabatic heat-insulation,
Liquid slag layer is mainly used to prevent molten steel oxidation and absorbs being mingled with for floating, and provides and fill between slab and copper plate of crystallizer gap
The molten slag of foot, these liquid slags continuously flow into slab and copper sheet gap, and shape under the periodic vibration effect of crystallizer
At solid slag film and melt cinder film double-layer structure, melt cinder film plays lubricating action, prevents slab drawing crack, solid slag film is to control crystallizer
Heat-transfer capability plays a key role again.Therefore, the melting capacity of covering slag plays a crucial role continuous casting process.
Under normal circumstances, the pouring temperature of molten steel can provide enough heat at 1500 ± 50 DEG C for the fusing of covering slag
Amount, but for some special steel grades, such as high-alloy steel, at 1400 DEG C or so, the fusing of covering slag just seems eats pouring temperature very much
Power.Moreover, also containing the strong reducing properties elements such as a certain amount of Al, Ti in molten steel, with SiO in these elements and covering slag2Based on
Oxide occur displacement reaction, lead to SiO in covering slag2It is decreased obviously, Al2O3, TiN quickly increase, directly result in slag
Viscosity and fusing point are substantially increased, and fusing point is even more than the temperature of molten steel, and covering slag melting capacity deteriorates, and covering slag loses completely
Due lubricating function gently then causes cc billet surface quality bad, and defect increases, heavy then generate bleed-out accident, leads to continuous casting work
Skill can not normal continuous production.
To guarantee going on smoothly for continuous casting process, the prior art proposes a kind of liquid slag technology, i.e., is adding covering slag
It is first completely melt before entering crystallizer, provides additional heat source so there is no need to molten steel to guarantee the fusing of covering slag.But it is this
Method is difficult to realize industrial applications at present, because there is a Pinch technology to be not possible to break through, that is, the container material of melt cinder,
Molten damage of the nonmetallic resistance to material vulnerable to melt cinder, not only the service life is short, and pollutes melt cinder；Common metal, graphite etc. there are problem of oxidation,
Service life is also very short；Platinum is expensive, can not industrial applications.In addition, melt cinder requires very high, temperature to heating system, transportation system
Sticking problem not enough just easily occurs, maintenance cost is very high；Furthermore the technology needs to add heating furnace in continuous casting platform, not only takes up an area
Area is big, and also big to ambient contamination, and enforcement difficulty is equally difficult.
Moreover, covering slag is all inefficiency and waste of manpower by being manually slowly added in the prior art.
For the above problem in the presence of the prior art, a kind of slag adding machine is provided and is of great significance.
Utility model content
To solve the above problems, the utility model provides a kind of slag adding machine, automatic slag can be realized, and being capable of benefit
Own temperature of the covering slag before the molten steel surface that crystallizer is added is promoted with the radiant heat of molten steel in tundish.
To achieve the above object, the slag adding machine of the utility model, including for holding covering slag slag ladle and for
Crystallizer conveys the conveyance conduit of the covering slag, and one end of the conveyance conduit is connected with the slag ladle, the other end with it is described
Crystallizer is connected, and the conveyance conduit is equipped with operated pneumatic valve, is equipped with tundish above the crystallizer, the conveyance conduit
Middle section extends to the top of the Metal in Tundish, and the Metal in Tundish is using molten steel radiation heat to the conveyance conduit
In the covering slag heated.
Preferably, the middle section of the conveyance conduit is set to the inside of the tundish.
Further, the portion envelops that the conveyance conduit is located inside the tundish have refractory cotton or are coated with high temperature resistant
Coating.
Preferably, the tundish is equipped with lid, offers peep hole, the centre of the conveyance conduit on the lid
Part is set to above the peep hole and in the shape of a spiral.
Further, the conveyance conduit has refractory cotton close to the portion envelops of the peep hole or is coated with high temperature resistant painting
Layer.
Preferably, the conveyance conduit is stainless steel tube.
Preferably, the gas source of the operated pneumatic valve is inert gas.
Operated pneumatic valve is arranged, it can be achieved that automatic slag by being arranged on conveyance conduit in the slag adding machine of the utility model
Operation, improves efficiency and saves manpower；By the way that the middle section of conveyance conduit to be extended to the top of Metal in Tundish, tundish
Interior molten steel can heat the covering slag in conveyance conduit using molten steel radiation heat, and crystallizer is being added to promote covering slag
Molten steel surface before own temperature, effectively reduce molten steel heat required for covering slag is melted in molten steel surface, make to protect
Slag is also able to achieve normal fusion process in the case where the liquid steel temperature of crystallizer is relatively low, greatly improves the fusing energy of covering slag
Power quickly forms sufficient liquid slag layer, it is ensured that cc billet surface quality guarantees that continuous casting process normally produces.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the slag adding machine of the first embodiment of the utility model；
Fig. 2 is the schematic top plan view of the slag adding machine of second of embodiment of the utility model；
Fig. 3 is the structural schematic diagram of the slag adding machine of the third embodiment of the utility model.
Specific embodiment
In the following, structure and working principle to the utility model etc. are further described in conjunction with attached drawing.
Referring to FIG. 1 to FIG. 3, the slag adding machine of the utility model including the slag ladle 1 for holding covering slag and is used for knot
Brilliant device 6 conveys the conveyance conduit 3 of covering slag, and one end of conveyance conduit 3 is connected with slag ladle 1, and the other end is connected with crystallizer 6, defeated
Pipeline 3 is sent to be equipped with operated pneumatic valve 2, operated pneumatic valve 2 is connect with compressed gas gas source (not shown), and operated pneumatic valve 2 is opened
Afterwards, the covering slag in slag ladle 1 can be blowed by compressed gas to the molten steel surface of crystallizer 6 through conveyance conduit 3, realize automatic slag
Operation.The tundish 5 for accepting the molten steel in ladle 4 is equipped with above crystallizer 6, the middle section of conveyance conduit 3 extends to
The top of molten steel in tundish 5, molten steel in tundish 5 can using molten steel radiation heat to the covering slag in conveyance conduit 3 into
Row heating effectively reduces covering slag in molten steel to promote own temperature of the covering slag before the molten steel surface that crystallizer 6 is added
Molten steel heat required for surface melting is able to achieve covering slag also in the case where the liquid steel temperature of crystallizer 6 is relatively low normally
Fusion process, greatly improve the melting capacity of covering slag, quickly form sufficient liquid slag layer, it is ensured that cc billet surface quality is protected
Card continuous casting process normally produces.
The middle section of conveyance conduit 3 can be positioned as close to the molten steel of tundish 5, and this there are many arrangement
Partial length is long as far as possible.
As an implementation, as shown in Figure 1, being not provided with lid on tundish 5, conveyance conduit 3 can be extended to first
The top of tundish 5, then it is bent to the top of crystallizer 6.
As another embodiment, defeated to reduce molten steel thermal loss as shown in Fig. 2, tundish 5 is equipped with lid
The inside for sending the middle section of pipeline 3 that can be set to tundish 5, one end of conveyance conduit 3 are connected with slag ladle 1, and the other end extends to
Tundish 5, and the top of molten steel for penetrating the inside of tundish 5 and being arranged in tundish 5, prolong along 5 length direction of tundish
Tundish 5 is pierced by after stretching again, so that the covering slag in conveyance conduit 3 can fully absorb the radiations heat energy of molten steel.In order to prevent
3 outer surface of conveyance conduit aoxidizes at high temperature, and the portion envelops that conveyance conduit 3 is located at the inside of tundish 5 have refractory cotton or painting
There is high-temperaure coating.
As the third embodiment, as shown in figure 3, tundish 5 is equipped with lid (not indicating in figure), opened up on lid
There is a peep hole 7, the middle section of conveyance conduit 3 is set to 7 top of peep hole and in the shape of a spiral, one end of conveyance conduit 3 and slag ladle 1
It is connected, the other end extends to 7 top of peep hole and spiral is finally re-extended to peep hole 7 to 6 top of crystallizer from up to down.
Equally, 3 outer surface of conveyance conduit aoxidizes at high temperature in order to prevent, and conveyance conduit 3 has fire resisting close to the portion envelops of peep hole 7
Cotton is coated with high-temperaure coating.
Stainless steel tube can be used in above-mentioned conveyance conduit 3.
In order to effectively control the burn-off rate of covering slag, the aggregation of covering slag drop is prevented, can be incorporated in covering slag certain
The carbonaceous material of amount, carbonaceous material burns at high temperature in covering slag in order to prevent, and the gas for conveying covering slag is i.e. pneumatic
The gas source of valve 2 should be inert gas, such as nitrogen or argon gas, to avoid covering slag in conveyance conduit 3 with the oxygen in air
Gas contact, to inhibit the burning of carbon, can inhibit the sintering of covering slag well, covering slag and conveyance conduit 3 will not occur
The phenomenon that inner wall adheres to.
More than, the only schematic description of the utility model, it will be recognized by those skilled in the art that practical without departing from this
On the basis of novel working principle, a variety of improvement can be made to the utility model, this belongs to the protection of the utility model
Range.
Claims (7)
1. a kind of slag adding machine, which is characterized in that including the slag ladle for holding covering slag and for described in crystallizer conveying
The conveyance conduit of covering slag, one end of the conveyance conduit are connected with the slag ladle, and the other end is connected with the crystallizer, described
Conveyance conduit is equipped with operated pneumatic valve, is equipped with tundish above the crystallizer, the middle section of the conveyance conduit extends to
The top of the Metal in Tundish, the Metal in Tundish is using molten steel radiation heat to the covering slag in the conveyance conduit
It is heated.
2. slag adding machine as described in claim 1, which is characterized in that the middle section of the conveyance conduit is set to the centre
The inside of packet.
3. slag adding machine as claimed in claim 2, which is characterized in that the conveyance conduit is located at the portion inside the tundish
Subpackage is wrapped with refractory cotton or is coated with high-temperaure coating.
4. slag adding machine as described in claim 1, which is characterized in that the tundish is equipped with lid, opens on the lid
Equipped with peep hole, the middle section of the conveyance conduit is set to above the peep hole and in the shape of a spiral.
5. slag adding machine as claimed in claim 4, which is characterized in that the conveyance conduit is wrapped close to the part of the peep hole
It is wrapped with refractory cotton or is coated with high-temperaure coating.
6. slag adding machine as described in claim 1, which is characterized in that the conveyance conduit is stainless steel tube.
7. slag adding machine as described in claim 1, which is characterized in that the gas source of the operated pneumatic valve is inert gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821597443.3U CN209139785U (en) | 2018-09-28 | 2018-09-28 | A kind of slag adding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821597443.3U CN209139785U (en) | 2018-09-28 | 2018-09-28 | A kind of slag adding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209139785U true CN209139785U (en) | 2019-07-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821597443.3U Active CN209139785U (en) | 2018-09-28 | 2018-09-28 | A kind of slag adding machine |
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| Country | Link |
|---|---|
| CN (1) | CN209139785U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110548840A (en) * | 2019-10-09 | 2019-12-10 | 辽宁科技大学 | device and method for adding heated solid-state covering slag into crystallizer in continuous casting process |
| CN115069992A (en) * | 2021-03-16 | 2022-09-20 | 宝山钢铁股份有限公司 | Continuous casting production method based on solid-state covering slag preheating |
-
2018
- 2018-09-28 CN CN201821597443.3U patent/CN209139785U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110548840A (en) * | 2019-10-09 | 2019-12-10 | 辽宁科技大学 | device and method for adding heated solid-state covering slag into crystallizer in continuous casting process |
| CN110548840B (en) * | 2019-10-09 | 2024-04-02 | 辽宁科技大学 | Device and method for adding heating solid-state protecting slag into crystallizer in continuous casting process |
| CN115069992A (en) * | 2021-03-16 | 2022-09-20 | 宝山钢铁股份有限公司 | Continuous casting production method based on solid-state covering slag preheating |
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