CN211758436U - Protective structure for ladle sliding gate - Google Patents
Protective structure for ladle sliding gate Download PDFInfo
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- CN211758436U CN211758436U CN201922237828.XU CN201922237828U CN211758436U CN 211758436 U CN211758436 U CN 211758436U CN 201922237828 U CN201922237828 U CN 201922237828U CN 211758436 U CN211758436 U CN 211758436U
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Abstract
The utility model belongs to the field of steel ladles, in particular to a protective structure for a steel ladle sliding nozzle, wherein the sliding nozzle is arranged in a sliding mold frame; the sliding water gap is connected with the sliding mold frame through an adjusting mechanism; the adjusting mechanism comprises an adjusting bolt, and the adjusting bolt comprises an adjusting bolt body; an air supply channel is axially arranged on the adjusting bolt body, one end of the adjusting bolt is arranged on the outer side of the sliding mold frame, and the other end of the adjusting bolt extends into the sliding mold frame; the adjusting bolt is connected with an argon gas supply part. The utility model discloses a ladle is protective structure for sliding gate has increased the argon protection to the slide periphery on the technique of prior art, the utility model discloses a ladle sliding gate argon sealing method has realized the non-oxidation protection casting between the ladle sliding gate, realizes that continuous casting process molten steel furthest reduces oxygenation and increases nitrogen, has created the condition for super clean steel continuous casting production.
Description
Technical Field
The utility model belongs to the ladle field is a ladle is protective structure for sliding nozzle particularly.
Background
With the rapid development of economy in China, the requirements of industries such as automobiles, petroleum, machinery manufacturing and the like on steel materials are higher and higher, and how to smelt ultra-pure steel becomes an important task in the field of steel materials at present.
The cleanliness of steel refers to the number, size, distribution and morphology of non-metallic inclusions in the steel. In order to prevent secondary oxidation (oxygen and nitrogen increase) of the refined molten steel and ensure the cleanliness of a casting blank, the molten steel needs to be isolated from air in the casting process.
At present, a long nozzle, a sealing pad and argon are adopted from a large ladle to a middle ladle for protection; the liquid level of the tundish adopts a covering agent and argon gas sealing protection technology;
the casting flow from the tundish to the crystallizer adopts an integral submerged nozzle or an argon protection technology;
the liquid level of the crystallizer adopts a covering slag technology.
Before entering the long nozzle from the ladle, the molten steel needs to pass through a ladle upper nozzle, an upper sliding plate, a lower sliding plate, a ladle lower nozzle and the like.
Refractory mortar is required to be smeared between the ladle upper nozzle and the upper sliding plate and between the lower sliding plate and the ladle lower nozzle for sealing,
the sealing between the upper and lower sliding plates can only be ensured by the smooth finish of the contact surfaces of the two sliding plates, the upper and lower sliding plates frequently slide relatively in the casting process and high-temperature molten steel is subjected to corrosion radiation, and the contact surfaces of the sliding plates have obvious oxidation and decarburization phenomena and cracks.
Because molten steel flows at a high speed during casting, a negative pressure phenomenon can occur between the upper sliding plate and the lower sliding plate, and the phenomenon of secondary oxidation of the molten steel caused by air suction between the upper sliding plate and the lower sliding plate can be determined.
In order to solve the above problems, improvements in sliding gate valves are now required.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the not enough of prior art, provide a realize the protective structure of ladle sliding gate non-oxidation casting.
In order to realize the purpose, the utility model discloses a technical scheme be:
a ladle sliding gate uses the protective structure, the said sliding gate is set up in the sliding die frame; the sliding water gap is connected with the sliding mold frame through an adjusting mechanism; the adjusting mechanism comprises an adjusting bolt, and the adjusting bolt comprises an adjusting bolt body; an air supply channel is axially arranged on the adjusting bolt body and penetrates through the adjusting bolt body; one end of the adjusting bolt is arranged on the outer side of the sliding mold frame, and the other end of the adjusting bolt extends into the sliding mold frame; the adjusting bolt is connected with an argon gas supply part.
The end part of the adjusting bolt body is provided with a limiting sinking groove, the inner wall of the limiting sinking groove is provided with a limiting strip block, and a notch is assembled on the limiting strip block; the argon gas supply part comprises a gas supply pipeline, and the end part of the gas supply pipeline is provided with a limiting block.
The limiting sink groove comprises a connecting groove, a placing groove and a positioning groove; the connecting groove is connected with the positioning groove through the placing groove, and the positioning groove is communicated with the gas supply channel; the inner diameter of the connecting groove is larger than that of the placing groove, the inner diameter of the placing groove is larger than that of the positioning groove, and a sealing gasket is arranged in the placing groove; the diameter of the gas supply pipeline is the same as that of the positioning groove; and the air supply pipeline is provided with an extrusion plate matched with the sealing washer.
The gas supply channel is in an inverted cone shape; the end in the sliding mould frame is smaller.
The adjusting mechanism comprises a compression joint mechanism connected with the sliding nozzle, the compression joint mechanism comprises a brick pressing connecting block, and two ends of the brick pressing connecting block are respectively provided with a brick pressing corner block attached to the side surface of the sliding nozzle; the adjusting mechanism at least comprises two crimping mechanisms which are uniformly distributed on the periphery of the sliding water gap; the brick pressing connecting block in at least one of the pressing mechanisms is connected with an adjusting bolt; the brick pressing connecting block is provided with a jet orifice; the injection opening is communicated with the air supply channel.
A use method of a protective structure for a ladle sliding gate valve comprises the following steps:
(1) assembling the adjusting mechanism inside the sliding mold frame;
(2) after the molten steel is refined, after the ladle is hung to the continuous casting rotary table, connecting an argon gas supply component with the adjusting mechanism, starting the argon gas supply component, and injecting argon gas to the peripheries of the upper drawing plate and the lower drawing plate through adjusting bolts;
(3) and after the casting is finished, closing the argon supply part.
The argon pressure range in the step (2) is 0.1-0.3 MPa.
The utility model has the advantages that:
the utility model discloses a ladle is protective structure for sliding gate has increased the argon protection to the slide periphery on the technique of prior art, the utility model discloses a ladle sliding gate argon sealing method has realized the non-oxidation protection casting between the ladle sliding gate, realizes that continuous casting process molten steel furthest reduces oxygenation and increases nitrogen, has created the condition for super clean steel continuous casting production.
Drawings
The contents of the various figures of the specification and the labels in the figures are briefly described as follows:
fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is the structure schematic diagram of the utility model discloses well adjusting bolt after optimizing.
Fig. 3 is a top view of the middle limit sink of the present invention.
Fig. 4 is a front view of the air supply pipeline of the present invention.
The labels in the above figures are:
1. the sliding mold frame 2, the adjusting bolt body 3, the brick pressing connecting block 4 and the sliding water gap.
Detailed Description
The following description of the preferred embodiments of the present invention will be made in further detail with reference to the accompanying drawings.
A ladle sliding gate uses the protective structure, the said sliding gate 4 is set up in the sliding die frame 1; the sliding water gap 4 is connected with the sliding mold frame 1 through an adjusting mechanism; the adjusting mechanism comprises an adjusting bolt, and the adjusting bolt comprises an adjusting bolt body 2; an air supply channel 21 is axially arranged on the adjusting bolt body 2, and the air supply channel 21 penetrates through the adjusting bolt body 2; one end of the adjusting bolt is arranged on the outer side of the sliding mold frame 1, and the other end of the adjusting bolt extends into the sliding mold frame 1; the adjusting bolt is connected with an argon supply part; when the argon protection device is used, the argon supply part supplies gas for the adjusting bolt, and the adjusting bolt transmits argon to the periphery of the sliding plate so as to protect the periphery of the sliding plate from the argon; the utility model adopts the argon sealing method of the ladle sliding nozzle 4, realizes the non-oxidation protection casting between the ladle sliding nozzles 4, realizes the maximum reduction of oxygen and nitrogen in the molten steel in the continuous casting process, and creates conditions for the continuous casting production of ultra-clean steel; additionally, the utility model discloses in addition to above-mentioned utility model discloses in some, the utility model discloses still there is an important utility model point to having improved the adjusting bolt model, adjusting bolt is realizing its fixed fastening effect outside, still its effect that has adapter, nozzle, feasible the utility model discloses do not need other spare parts of excessive increase, reduction in production cost that can be fine.
In addition, argon gas is known for molten steel casting protection, but is not present at present for use in the sliding gate valve 4; the utility model discloses outside argon gas passes through the air feed channel 21 on the adjusting bolt and flows through the jet 32 on the brick connecting block 3 and get into inside sliding die frame 1, forms the argon gas guard circle inside whole sliding die frame 1 and between the top and bottom slide, thereby the molten steel realizes the non-oxidation casting between the top and bottom slide in the casting of argon gas atmosphere.
Preferably, in the utility model, the end of the adjusting bolt body 2 is provided with a limit sink groove, the inner wall of the limit sink groove is provided with a limit bar 26, and the limit bar 26 is provided with a notch 27; the argon gas supply part comprises a gas supply pipeline 5, and the end part of the gas supply pipeline 5 is provided with a limiting block 52; still use and get into spacing heavy inslot portion through assembly notch 27 by stopper 52, rotate gas supply line 5 for stopper 52 is wrong with assembly notch 27, and at this moment because the setting of spacing strip piece 26, spacing strip piece 26 blocks pulling out of stopper 52, based on such disclosure, can realize the stable connection of gas supply line 5 and adjusting bolt tip.
The gas supply pipeline 5 is connected with a gas supply device, the gas supply device adopts the existing arrangement, as long as the pure argon can be provided for the gas supply pipeline 5, and the part belongs to the known technology and is not described in detail herein.
Preferably, the limit sinking groove of the present invention comprises a connecting groove 24, a placing groove 23 and a positioning groove 22; the connecting groove 24 is connected with the positioning groove 22 through a placing groove 23, and the positioning groove 22 is communicated with the gas supply channel 21; the inner diameter of the connecting groove 24 is larger than that of the placing groove 23, the inner diameter of the placing groove 23 is larger than that of the positioning groove 22, and a sealing washer 25 is arranged in the placing groove 23; the diameter of the gas supply pipeline 5 is the same as that of the positioning groove 22; the air supply pipeline 5 is provided with an extrusion plate 51 matched with the sealing washer 25; the extrusion plate is matched with the placing groove to realize the extrusion fixation of the sealing washer; the utility model is convenient for the insertion of the gas supply pipeline 5 through the arrangement of the positioning groove 22, and plays a role of initial positioning, in addition, the utility model also discloses a placing groove 23, the placing groove 23 is used for placing a sealing gasket, and in order to reduce the overflow and dispersion of the argon supplied by the gas supply pipeline 5 from the connection part of the gas supply pipeline 5 and the adjusting bolt; the connecting groove 24 is used for installing each stopper 26 and the like, and is used for connecting the adjusting bolt and the air supply duct 5.
Preferably, in the present invention, the air supply channel 21 is in an inverted cone shape; one end in the sliding mould frame 1 is smaller; the spraying speed of the air supply channel 21 to the inside of the sliding mold frame 1 is increased, and the protection effect is optimized.
Preferably, the adjusting mechanism of the present invention comprises a pressing mechanism connected to the sliding gate 4, the pressing mechanism comprises a brick pressing connecting block 3, and two ends of the brick pressing connecting block 3 are respectively provided with a brick pressing corner block attached to the side surface of the sliding gate 4; the adjusting mechanism at least comprises two crimping mechanisms which are uniformly distributed on the periphery of the sliding water gap 4; the brick pressing connecting block 3 in at least one of the pressing mechanisms is connected with an adjusting bolt; the brick pressing connecting block 3 is provided with a jet orifice 32; the injection port 32 communicates with the air supply passage 21; through the arrangement of the jet orifice 32, the communication between the adjusting bolt and the sliding water gap 4 is realized, and the subsequent argon protection is convenient to supply; in addition, as optimized; be equipped with briquetting thread groove 31 on pressing brick connecting block 3, the setting up of briquetting thread groove 31 has made things convenient for adjusting bolt and has pressed being connected between the brick connecting block 3, has made things convenient for arranging between the part.
A method of using a protective structure for a ladle sliding gate valve 4, the method comprising the steps of:
(1) assembling the adjusting mechanism inside the sliding mold frame 1;
(2) after the molten steel is refined, after the ladle is hung to the continuous casting rotary table, connecting an argon gas supply component with the adjusting mechanism, starting the argon gas supply component, and injecting argon gas to the peripheries of the upper drawing plate and the lower drawing plate through adjusting bolts;
(3) and after the casting is finished, closing the argon supply part.
The argon pressure range in the step (2) is 0.1-0.3 Mpa; the use of the pressure in the range can reduce the use of argon and can also achieve the required protection effect.
The present application is discussed below in conjunction with the examples:
the utility model optimally sets the adjusting bolt in the sliding gate 4 mechanism to change the adjusting bolt into a hollow adjusting bolt;
the outside of the bolt is connected with an argon gas supply pipeline 5;
the connecting part of the brick pressing connecting block 3 and the adjusting bolt is provided with a jet orifice 32; the adjusting bolt is communicated with the gas supply pipeline 5, external argon flows through the gas supply channel 21 and the injection orifice 32 of the brick pressing connecting block 3 to enter the sliding mould frame 1, and an argon protective atmosphere is formed inside the whole sliding mould frame 1 and between the upper sliding plate and the lower sliding plate. Molten steel is cast in argon atmosphere, so that non-oxidation casting is realized between the upper sliding plate and the lower sliding plate.
Adopt the utility model discloses compare with current other control techniques, adopt the 4 argon of ladle sliding gate mouth to seal the method, realized that there is not oxidation protection casting between the ladle sliding gate mouth 4, realize that continuous casting process molten steel furthest reduces oxygenation and increases nitrogen, realizes the super clean steel continuous casting production creation condition.
The method of the utility model can control the nitrogen increase from the continuous casting ladle to the tundish within less than or equal to 2 ppm.
Obviously the specific implementation of the present invention is not limited by the above-mentioned manner, and various insubstantial improvements made by the method concept and technical solution of the present invention are all within the protection scope of the present invention.
Claims (5)
1. A protective structure for a ladle sliding nozzle is characterized in that the sliding nozzle is arranged in a sliding mold frame; the sliding water gap is connected with the sliding mold frame through an adjusting mechanism; the adjusting mechanism comprises an adjusting bolt, and the adjusting bolt comprises an adjusting bolt body; an air supply channel is axially arranged on the adjusting bolt body and penetrates through the adjusting bolt body; one end of the adjusting bolt is arranged on the outer side of the sliding mold frame, and the other end of the adjusting bolt extends into the sliding mold frame; the adjusting bolt is connected with an argon gas supply part.
2. The protective structure for the ladle sliding gate according to claim 1, wherein the end of the adjusting bolt body is provided with a limit sink groove, the inner wall of the limit sink groove is provided with a limit strip block, and the limit strip block is provided with a notch; the argon gas supply part comprises a gas supply pipeline, and the end part of the gas supply pipeline is provided with a limiting block.
3. The ladle sliding gate valve guard structure according to claim 2, wherein the limit sink comprises a connecting groove, a placing groove and a positioning groove; the connecting groove is connected with the positioning groove through the placing groove, and the positioning groove is communicated with the gas supply channel; the inner diameter of the connecting groove is larger than that of the placing groove, the inner diameter of the placing groove is larger than that of the positioning groove, and a sealing gasket is arranged in the placing groove; the diameter of the gas supply pipeline is the same as that of the positioning groove; and the air supply pipeline is provided with an extrusion plate matched with the sealing washer.
4. The ladle sliding gate valve guard structure according to claim 2, wherein the gas supply channel is in an inverted cone shape; the end in the sliding mould frame is smaller.
5. The protective structure for the ladle sliding gate valve according to claim 1, wherein the adjusting mechanism comprises a crimping mechanism connected with the sliding gate valve, the crimping mechanism comprises a brick pressing connecting block, and two ends of the brick pressing connecting block are respectively provided with a brick pressing corner block attached to the side surface of the sliding gate valve; the adjusting mechanism at least comprises two crimping mechanisms which are uniformly distributed on the periphery of the sliding water gap; the brick pressing connecting block in at least one of the pressing mechanisms is connected with an adjusting bolt; the brick pressing connecting block is provided with a jet orifice; the injection opening is communicated with the air supply channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922237828.XU CN211758436U (en) | 2019-12-13 | 2019-12-13 | Protective structure for ladle sliding gate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922237828.XU CN211758436U (en) | 2019-12-13 | 2019-12-13 | Protective structure for ladle sliding gate |
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| Publication Number | Publication Date |
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| CN211758436U true CN211758436U (en) | 2020-10-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922237828.XU Active CN211758436U (en) | 2019-12-13 | 2019-12-13 | Protective structure for ladle sliding gate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110788316A (en) * | 2019-12-13 | 2020-02-14 | 马鞍山钢铁股份有限公司 | Protective structure for ladle sliding gate and using method thereof |
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2019
- 2019-12-13 CN CN201922237828.XU patent/CN211758436U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110788316A (en) * | 2019-12-13 | 2020-02-14 | 马鞍山钢铁股份有限公司 | Protective structure for ladle sliding gate and using method thereof |
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