CN213537986U - Vacuum tank lifting type single-nozzle refining furnace device - Google Patents
Vacuum tank lifting type single-nozzle refining furnace device Download PDFInfo
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- CN213537986U CN213537986U CN202022324514.6U CN202022324514U CN213537986U CN 213537986 U CN213537986 U CN 213537986U CN 202022324514 U CN202022324514 U CN 202022324514U CN 213537986 U CN213537986 U CN 213537986U
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Abstract
The utility model provides a vacuum tank over-and-under type single-nozzle refining furnace device belongs to the technical field of ferrous metallurgy equipment. The device consists of a ladle system, a vacuum tank system, a hot bending system and an expansion joint system. The vacuum tank in the vacuum tank system is formed by sequentially connecting a dipping pipe, a lower vacuum tank and an upper vacuum tank from bottom to top, and the vertical lifting of the vacuum tank is realized through a hydraulic jacking mechanism; the hot bent pipe is positioned above the vacuum groove and is respectively butted with the upper vacuum groove and the expansion joint, and the vertical lifting of the hot bent pipe is realized through a hydraulic jacking mechanism; the expansion joint is in butt joint with the vacuum pumping pipeline, the expansion joint is expanded in the vertical direction through a hydraulic mechanism, and the expansion joint and the hot bent pipe form a closed structure. The utility model discloses can be with the vacuum tank that has the dip pipe stable and controllable insert to the ladle that contains the molten steel to form inclosed vacuum pumping channel, after the vacuum pump starts, can establish the required negative pressure condition of vacuum refining, have beneficial characteristics such as extensive applicability, construction cost are low, security height.
Description
Technical Field
The utility model relates to a ferrous metallurgy technical field especially involves a single-nozzle refining furnace device for molten steel vacuum refining.
Background
With the rapid development and intense competition of steel materials, more and more rigorous requirements are put on the quality of special steel. High cleanliness and efficient smelting of special steels are the goals sought by metallurgists.
The vacuum furnace external refining is an indispensable smelting process in the production process of special steel, the single-nozzle refining furnace related to the utility model is a novel molten steel vacuum refining furnace independently developed in China, firstly proposed by Beijing iron and steel institute (now: Beijing university of science and technology) in 1976, and then named as a single-nozzle insertion type vacuum argon blowing method, and forms a patent of single-nozzle vacuum refining equipment (authorization publication number): CN2040910U entitled "Single-nozzle refining furnace", also known as "Single-nozzle furnace", has been used up to now. In the past thirty years, the Zhang Zhen of Beijing university of science and technology and the Ministry of England developed deep theoretical research and wide industrial application to the single-nozzle refining furnace technology, and developed industrial cooperation tests successively in numerous domestic iron and steel enterprises. With the continuous development of the single-nozzle refining furnace technology, the refining function of the refining furnace is also continuously improved, the refining furnace has various metallurgical functions of degassing, decarbonization, desulfurization, inclusion removal, alloying and the like at present, the refining furnace has strong refining advantages in the production of a plurality of special steels such as low-carbon steel, low-sulfur steel and the like, and has high cost benefit and economic benefit in practical application.
During the vacuum treatment process of the single-nozzle refining furnace, the dip pipe needs to be inserted into the molten steel to establish a molten steel circulation channel, and after the treatment is finished, the dip pipe needs to be pulled out of the molten steel. At present, there are two main lifting modes for realizing the operations of inserting and pulling out the molten steel of the dip pipe of the single-nozzle furnace reported in China. One is the early "vacuum groove rotation lifting method", chinese patent CN2040910 [ grant publication No.: CN2040910U provides the single-nozzle refining furnace device that utilizes lever principle to make the vacuum tank possess lift, rotation operation at the earliest, mainly places vacuum tank and counter weight in the both ends of steel construction lever respectively, realizes the lift of vacuum tank through the lift of operation counter weight, and the lever is installed on rotatable pivot, realizes the rotation of vacuum tank through the rotation of operation counter weight, and then realizes the duplex position of single-nozzle furnace and smelts. The lifting mode is suitable for slow-paced industrial production at that time, but the use process has some problems, the sealing and closing effect of the vacuum groove air suction interface and the vacuum pipeline interface is poor after the vacuum groove rotates and lifts in place, and the air leakage phenomenon is serious; the working height of the vacuum tank is fixed when in use, and the vacuum tank cannot be flexibly adjusted according to the change of the molten steel amount. With the increasing level of mechanization in industrial production, this earlier lifting mode has been gradually eliminated.
The ladle lifting method is a lifting mode that a single-nozzle refining furnace uses more at present, and the mode mainly lifts a ladle car filled with a ladle to a certain height through a hydraulic system, so that a dip pipe below a vacuum tank forms a certain insertion depth in molten steel, then carries out vacuum treatment on the molten steel, and after the treatment is finished, the ladle car is dropped onto a ladle car track. Compared with a vacuum groove rotary lifting method, the method has the advantages that: the structure is simple, the operation is easy, and the production requirement of fast pace can be well met; the jacking height of the ladle is adjustable, and the adaptability is strong. Although this method is widely used, there are some problems in practical application:
(1) the method integrally lifts the steel ladle filled with high-temperature molten steel to the height of a specific refining station through the jacking mechanism arranged at the bottom of the steel ladle through a hydraulic system, so that strict requirements are provided for the hydraulic jacking mechanism at the bottom, and the method has the advantages of extremely high safety, stability and reliability. And also means that the construction and maintenance costs of the hydraulic system are significantly increased.
(2) The ladle hydraulic jacking mechanism is usually arranged in a deeper pit, so that strict requirements are provided for geological conditions, the pit construction requirements are higher for places where groundwater easily upwelles along rivers, coastal areas and the like, and the pit cannot be constructed even in some areas. In addition, for some old plants, there may be situations where a pit cannot be built, subject to conditions and environmental constraints.
Therefore, the utility model provides a another can realize that single nozzle stove dip pipe stably inserts the operating system of molten steel, accomplishes vacuum treatment, lifts out the ladle, provides a new solution and selected mode for the construction and the use of single nozzle refining furnace.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a single-nozzle refining furnace device with a vacuum tank capable of flexibly ascending and descending.
The utility model provides an above-mentioned technical problem adopted technical scheme as follows:
a vacuum groove lifting type single-nozzle refining furnace device comprises a ladle system, a vacuum groove system, a hot bending pipe system and an expansion joint system.
The vacuum tank in the vacuum tank system is formed by sequentially connecting a dipping pipe, a lower vacuum tank and an upper vacuum tank from bottom to top, the vacuum tank is placed on a tank car, and a first hydraulic jacking mechanism is arranged on the tank car to realize the vertical lifting of the vacuum tank.
The hot bent pipe is located above the vacuum groove, is of an inverted U-shaped structure, is provided with two water-cooling bends, is in sealing butt joint with the upper vacuum groove and the expansion joint respectively, and is provided with a second hydraulic jacking mechanism to realize the vertical lifting of the hot bent pipe.
The expansion joint is connected with a vacuum pumping pipeline, and a sealing air bag is arranged between the expansion joint and the vacuum pumping pipeline; the expansion joint is provided with a third hydraulic jacking mechanism, so that the expansion joint can move up and down in the vacuum pumping pipeline in a telescopic manner and form a closed state with the hot bent pipe.
The ladle is placed on a ladle car, the ladle car is placed under the vacuum tank, the center line of the ladle is kept to be coincident with the center line of the dip pipe, and the position is unchanged in the whole refining process.
Preferably, the buggy ladle is capable of walking.
Preferably, the tank car is capable of walking.
Preferably, the vacuum tank is provided with a lifting trunnion. The vacuum tank and the dipping pipe are all built with high-temperature refractory materials which are easy to consume, regular replacement and maintenance are needed, and the design of the lifting trunnion enables the operations such as installation, maintenance and replacement of the vacuum tank to be more convenient and flexible.
The utility model discloses above technical characteristics's implementation step does: the method comprises the following steps of (1) hoisting a steel ladle containing molten steel into a ladle car, driving the ladle car to a single-nozzle furnace working position, enabling a vacuum tank to descend by controlling a first hydraulic jacking mechanism until a dip pipe at the lower end of the vacuum tank is stably inserted into the molten steel, and stopping descending after the dip pipe is inserted into a specified depth; the second hydraulic jacking mechanism is controlled to enable the hot bent pipe to descend until the port of the hot bent pipe and the port at the top of the vacuum groove are closed; and the expansion joint extends upwards by controlling the third hydraulic jacking mechanism until the expansion joint and the port of the hot bent pipe form a closed state, and the sealed air bag is rapidly inflated and sealed after the closed state, so that a closed vacuum pumping passage is established, and the vacuum treatment of the molten steel can be executed after the vacuum pump is started step by step. After treatment is finished and repressing is carried out, the hot bent pipe is jacked to a specified height by controlling the second hydraulic jacking mechanism, the expansion joint air bag is deflated, the first hydraulic jacking mechanism is controlled to jack the vacuum tank until the dip pipe is separated from the steel ladle, and the vertical distance between the bottom of the dip pipe and the opening of the steel ladle after separation is controlled to be 0.2-0.5 m. And after the dip pipe is separated, the buggy ladle is driven out of the working position, and refining is finished.
After the refining times of the single-nozzle furnace reach a certain number, the tank car can be driven out of the working position and driven into a maintenance position for maintenance operation; if the vacuum tank needs to be integrally replaced and maintained, the lifting trunnions on the vacuum tank can be hooked by a travelling crane at a maintenance position to integrally lift the vacuum tank out, and then replacement and maintenance are carried out in a maintenance area.
Implement the utility model discloses realizable beneficial effect as follows:
(1) by adopting the vacuum groove lifting type single-nozzle refining furnace device, the vacuum groove with the dip pipe can be stably and controllably inserted into a steel ladle filled with molten steel, and a closed vacuum pumping channel is formed, after a vacuum pump is started, a negative pressure condition required by vacuum refining can be established, and various basic operation requirements required by normal operation of a single-nozzle furnace are met;
(2) under the same smelting condition, the vacuum groove lifting type single-nozzle refining furnace can achieve the same level smelting rhythm as the traditional ladle lifting type single-nozzle refining furnace;
(3) when the single-nozzle refining furnace is adopted for carrying out the molten steel treatment, the steel ladle does not need to be jacked, the applicability is wide, the construction cost is low, and the safety is higher;
(4) the construction cost is low, and no special requirements are made on geology.
Drawings
FIG. 1 is a front sectional view of a vacuum vessel elevation type single-nozzle refining furnace apparatus;
FIG. 2 is a side view of a vacuum tank elevation type single-nozzle finer.
In the figure: 1-buggy ladle; 2-steel ladle; 3-dipping a pipe; 4-a lower vacuum tank; 5-upper vacuum tank; 6-tank car; 7-a first hydraulic jacking mechanism; 8-lifting the platform; 9-a second hydraulic jacking mechanism; 10-hot bending the tube; 11-expansion joints; 12-a third hydraulic jacking mechanism; 13-sealing the air bag; 14-vacuum pumping pipeline; 15-lifting trunnions; 16-vacuum charging system.
Detailed Description
In order to make the technical problems to be solved, the technical features and advantages of the present invention clearer, the following will explain in detail the embodiments of the present invention with reference to the accompanying drawings.
The utility model provides a vacuum groove lifting type single-nozzle refining furnace device, which is composed of a ladle system, a vacuum groove system, a hot bending pipe system and an expansion joint system as shown in figure 1 and figure 2.
The vacuum tank includes upper portion vacuum tank 5 and lower part vacuum tank 4, and the below of lower part vacuum tank 4 is connected with impregnated tube 3, and the vacuum tank is installed on tank wagon 6 that can walk, and the design has the braced frame of steel construction on the tank wagon 6, is equipped with first hydraulic jacking mechanism 7 on the braced frame, is connected with lift platform 8 on the first hydraulic jacking mechanism 7, and the vacuum tank level is located on lift platform 8, through the vertical lift of controlling first hydraulic jacking mechanism 7 realization vacuum tank.
The hot bent pipe 10 is located above the vacuum groove and is of an inverted U-shaped structure, two ends of the hot bent pipe are respectively in sealing butt joint with the upper vacuum groove 5 and the expansion joint 11 below the hot bent pipe, and the hot bent pipe 10 is vertically lifted through the second hydraulic jacking mechanism 9.
The ladle 2 is placed on the travelling ladle car 1, the ladle car 1 is placed under the lower vacuum tank 4, the center line of the ladle 2 is kept coincident with the center line of the dip pipe 3, and the position is unchanged in the whole refining process.
Adopt the utility model discloses the device carries out molten steel vacuum refining's concrete operating procedure as follows:
firstly, the ladle is driven into the working position
The tank wagon 6 loaded with the vacuum tank is opened to a refining working position in advance and locked, the ladle 2 filled with molten steel to be treated is hung into the ladle wagon 1 through a travelling crane, the ladle wagon 1 is opened to be right below the vacuum tank 4 at the lower part, the central line of the ladle 2 is superposed with the central line of the dip pipe 3, the ladle wagon 1 is locked, and the position is kept constant.
② the vacuum tank descends
The vacuum tank on the lifting platform 8 is slowly descended by controlling the first hydraulic jacking mechanism 7 until the dip pipe 3 connected below the lower vacuum tank 4 reaches the specified insertion depth in the molten steel, and then the first hydraulic jacking mechanism 7 is locked.
③ the descending of the hot bent pipe
The hot bent pipe 10 is stably descended by controlling the second hydraulic jacking mechanism 9 until the hot bent pipe 10 forms a close with the upper port of the upper vacuum groove 5, and then the second hydraulic jacking mechanism 9 is locked.
Expansion joint rising
By controlling the third hydraulic jacking mechanism 12, the expansion joint 11 is stably lifted until the expansion joint and the port of the hot bent pipe 10 are closed, the air valve is opened to rapidly inflate the sealing air bag 13, and a gap between the vacuum air extraction pipeline 14 and the expansion joint 11 is sealed. Up to this point, a sealed evacuation path is formed from the vacuum evacuation line 14 to the dip tube 3.
Fifthly, vacuum treatment
And starting a vacuum pump to vacuumize, simultaneously blowing argon for stirring by using the air brick at the bottom of the steel ladle 2, arranging a vacuum feeding system 16 on the upper vacuum tank 5, adding alloy, slag charge and other raw and auxiliary materials into the molten steel according to smelting requirements in the treatment process, and after the vacuum treatment task is finished, closing the vacuum pump until the pressure in the pipeline 14 is restored to the normal pressure.
Lifting hot bent pipe
The second hydraulic jacking mechanism 9 is controlled to stably lift the hot bent pipe 10, the hot bent pipe 10 is separated from the upper vacuum groove 5 and the expansion joint 11, and the second hydraulic jacking mechanism 9 is locked after the pipe is lifted to a specified height.
Lifting the vacuum tank
The vacuum groove on the hydraulic lifting platform 8 is lifted up by controlling the first hydraulic jacking mechanism 7 until the dip pipe 3 is separated from the steel ladle 2, and the vertical distance between the bottom surface of the dip pipe and the opening of the steel ladle is controlled to be 0.2-0.5 m.
Allowing the ladle to leave the working position
And unlocking the ladle car 1, and moving the ladle car 1 out of the refining working position until the vacuum treatment of the molten steel is finished.
Ninthly maintenance work
After the refining times of the single-nozzle furnace reach a certain number, the tank wagon 6 can be driven out of the working position and driven into a maintenance position, and the maintenance operations such as baking, spray repair, slag scraping and the like can be performed on the vacuum tank and the dip pipe 3 at the working position; if the vacuum tank needs to be integrally replaced and maintained, the lifting trunnion 15 on the vacuum tank can be hooked by a crane at a maintenance position to integrally lift the vacuum tank out, and then the vacuum tank is replaced and maintained in a maintenance area.
The foregoing is a preferred embodiment of the present invention, but the present invention is not limited to the above-mentioned embodiment, which is only illustrative and not restrictive, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the scope of the invention as defined by the principle of the invention and the claims, and these modifications and decorations should also be regarded as the protection scope of the invention.
Claims (4)
1. A vacuum groove lifting type single-nozzle refining furnace device is characterized by comprising a ladle system, a vacuum groove system, a hot bending pipe system and an expansion joint system; the vacuum tank in the vacuum tank system is formed by sequentially connecting a dipping pipe, a lower vacuum tank and an upper vacuum tank from bottom to top, the vacuum tank is placed on a tank car, and a first hydraulic jacking mechanism is arranged on the tank car to realize the vertical lifting of the vacuum tank; the hot bent pipe is positioned above the vacuum groove, is of an inverted U-shaped structure, is provided with two water-cooling elbows, two ends of the water-cooling elbows are respectively butted with the vacuum groove and the expansion joint, and the hot bent pipe is provided with a second hydraulic jacking mechanism to realize the vertical lifting of the hot bent pipe; the expansion joint is connected with a vacuum air exhaust pipeline, a sealing air bag is arranged between the expansion joint and the vacuum air exhaust pipeline, and a third hydraulic jacking mechanism is arranged on the expansion joint to realize the expansion of the expansion joint in the vertical direction and form a closed state with a hot bent pipe; the ladle is placed on a ladle car, the ladle car is placed under the vacuum tank, the center line of the ladle is kept to be coincident with the center line of the dip pipe, and the position is unchanged in the whole refining process.
2. The vacuum vessel elevating single-nozzle refining furnace apparatus according to claim 1, wherein the buggy ladle is capable of traveling.
3. The vacuum vessel elevating single-nozzle refining furnace apparatus according to claim 1, wherein the vessel car is capable of traveling.
4. The vacuum vessel elevating single-nozzle refining furnace apparatus according to claim 1, wherein the vacuum vessel is provided with a lifting trunnion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022324514.6U CN213537986U (en) | 2020-10-20 | 2020-10-20 | Vacuum tank lifting type single-nozzle refining furnace device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022324514.6U CN213537986U (en) | 2020-10-20 | 2020-10-20 | Vacuum tank lifting type single-nozzle refining furnace device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213537986U true CN213537986U (en) | 2021-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022324514.6U Active CN213537986U (en) | 2020-10-20 | 2020-10-20 | Vacuum tank lifting type single-nozzle refining furnace device |
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| CN (1) | CN213537986U (en) |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A vacuum tank lifting single nozzle refining furnace device Effective date of registration: 20220926 Granted publication date: 20210625 Pledgee: Agricultural Bank of China Limited Nantong Haimen sub branch Pledgor: ZHONGXING ENERGY EQUIPMENT Co.,Ltd. Registration number: Y2022320010543 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |