CN106610218B - Vertical high-capacity efficient intermediate frequency furnace and production method thereof - Google Patents
Vertical high-capacity efficient intermediate frequency furnace and production method thereof Download PDFInfo
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- CN106610218B CN106610218B CN201510696638.8A CN201510696638A CN106610218B CN 106610218 B CN106610218 B CN 106610218B CN 201510696638 A CN201510696638 A CN 201510696638A CN 106610218 B CN106610218 B CN 106610218B
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Abstract
The invention relates to a vertical vanadium-nitrogen alloy heating furnace, in particular to a vertical high-capacity efficient intermediate frequency furnace and a production method thereof. The full-automatic feeding and discharging mode has high one-time production yield, and the metal reduction and nitriding processes are completed in the furnace body at one time; after the furnace burden is mature, the crucible can be withdrawn from the intermediate frequency furnace after being cooled to about 650 ℃ along with the furnace, the crucible enters a cooling chamber for secondary cooling, the second crucible can immediately enter the furnace body for production, the production is efficient, and the energy is saved. The feeding and discharging device with double gates is additionally arranged, so that the automatic feeding and discharging of materials are realized under the condition that the atmosphere in the furnace is not influenced; the furnace body cooling section which can cool quickly and is relatively independent is designed, so that the materials after reaction can be cooled quickly, and the production period is further shortened.
Description
Technical Field
The invention relates to a vertical vanadium-nitrogen alloy heating furnace, in particular to a vertical high-capacity efficient intermediate frequency furnace and a production method thereof.
Background
The vanadium-nitrogen alloy has various production modes, and the main process comprises the steps of uniformly mixing a vanadium raw material, carbon powder and a binder, pressing into balls, then feeding the balls into a furnace for heating, and obtaining a vanadium-nitrogen alloy product through reduction and nitridation processes. From the different division of equipment, the production method mainly comprises a push plate kiln method and an intermediate frequency furnace method.
The push plate kiln method has the advantages of being a mature production process, the method is used for producing the vanadium-nitrogen alloy under the non-vacuum condition, the simple and rapid production of the vanadium-nitrogen alloy can be realized, and the higher automation degree can be realized. But the push plate kiln method also has the major disadvantages: the method has the advantages of high energy consumption, high loss, poor sealing performance, difficult adjustment of nitrogen pressure in the furnace, low nitrogen content of products, main transverse space in the furnace, wide nitrogen distribution space, low utilization rate, large floor area, long overhaul time and high cost.
The heating of the intermediate frequency furnace is divided into horizontal heating and vertical heating.
The working principle of horizontal heating is similar to that of the pushed slab kiln, and the same problem as that of the pushed slab kiln exists only by replacing a heat source with electromagnetic induction heating.
The vertical medium frequency furnace method for producing vanadium-nitrogen alloy can increase the production scale by heightening the furnace body, thereby having the advantage of saving the occupied area. In addition, the vertical heating can realize the bottom feeding and ejection of nitrogen, the nitrogen and materials flow reversely, the contact area of reactants is increased, and the reaction activation energy is reduced. Meanwhile, the process that the smoke is discharged from the top passes through the material, the heat of the smoke can play a role in heating the material, and the energy utilization rate is improved.
Compare above vanadium nitrogen alloy production's technique and equipment, the problem that this patent exists to vertical intermediate frequency furnace technology develops the research, improves the automatic feeding and discharging device of furnace body to improve the production continuity, improve the cooling method that the furnace charge used now, in order to improve production rate.
Disclosure of Invention
The purpose of the invention is as follows: in order to provide a vertical high-capacity high-efficiency intermediate frequency furnace with better effect and a production method thereof, the concrete purpose is to see a plurality of substantial technical effects of the concrete implementation part.
In order to achieve the purpose, the invention adopts the following technical scheme:
the first scheme is as follows:
the production method of the vertical high-capacity efficient intermediate frequency furnace crucible is characterized in that a lower space and an upper space are sequentially provided with a feeding preparation chamber, a feeding chamber and a cooling chamber from left to right; the preparation chamber, the feeding chamber and the cooling chamber can be opened or closed through a sealing door, a feeding chamber valve is arranged on the sealing door arranged between the feeding preparation chamber and the feeding chamber, the feeding preparation chamber valve is arranged on the feeding preparation chamber, the feeding preparation chamber is also connected with a pipeline of a vacuum pump, a feeding device is arranged below the feeding chamber, a tray is arranged on the feeding device, the feeding device can lift the tray, an upper space is arranged above the feeding chamber, the upper space is a furnace body, a transverse sealing door is arranged between the feeding chamber and the furnace body, the furnace body is connected with the cooling chamber through a pipeline and the valve on the cooling chamber on the pipeline, an air inlet and outlet system is arranged above the furnace body, and the air inlet and outlet system is a pipeline and a valve; the cooling chamber comprises a cooling chamber valve, and is connected with a vacuum pump through a pipeline;
in the use process: the first crucible enters a feeding preparation chamber, a sealing door of the feeding preparation chamber is closed, a valve of the feeding chamber is opened, the sealing door of the feeding chamber connected with the furnace body is opened, an air inlet and outlet system and the valve thereof are closed, the feeding preparation chamber, the feeding chamber and the furnace body are vacuumized by using a vacuum pump, a vacuum degree detection device is installed in the feeding chamber, and meanwhile, a valve of a cooling chamber and a valve on the cooling chamber are closed for vacuumizing treatment; when the requirement is met, nitrogen is introduced through a valve of the feeding preparation chamber and a valve of the feeding chamber, a sealing door between the feeding preparation chamber and the feeding chamber is opened, a first crucible is placed on a tray, the crucible is lifted into the furnace body through a hydraulic device, the sealing door is closed, the tray is withdrawn from the furnace body, the valve of the cooling chamber and the valve on the cooling chamber are opened, the nitrogen is introduced, and an air inlet and outlet system is opened; the product is dried, preheated, reduced, nitrided and initially cooled in a furnace body; and cooling the furnace charge to 650 ℃, opening a sealing door, supporting the first crucible out of the tray, opening the sealing door between the feeding chamber and the cooling chamber, and moving the first crucible into a strong cooling mode.
The invention further adopts the technical scheme that the cooling chamber is formed by a double-layer hollow structure, the material is a heat-resistant and corrosion-resistant material, flowing cooling water is introduced between interlayers for auxiliary cooling, and nitrogen is continuously introduced into the chamber for auxiliary cooling; meanwhile, the furnace body is in a high-temperature state, and a second crucible enters the furnace body for production through the same steps; and (3) cooling the furnace charge in the first crucible to 100 ℃, and opening a sealing door of the cooling chamber to finish the discharging process of the furnace charge.
The crucible feeding device further comprises a material conveying frame, the first crucible can be fixed on the material conveying frame, the material conveying frame comprises holes, the first crucible is fixed in the holes in the material conveying frame, and the tray can be supported by the material feeding device and penetrates through the holes in the material conveying frame.
The invention further adopts the technical scheme that the material conveying frame is of a frame structure, and the frame structure can move.
The crucible furnace has the further technical scheme that the furnace body comprises a clamping structure, and the crucible can be clamped by the clamping structure.
The invention further adopts the technical scheme that a position sensor is arranged on the material conveying frame.
The invention further adopts the technical scheme that the outsides of the lower space and the upper space are both vanadium-nitrogen alloy shells.
Scheme II:
the vertical high-capacity efficient intermediate frequency furnace is characterized in that a lower space and an upper space are sequentially provided with a feeding preparation chamber, a feeding chamber and a cooling chamber from left to right; the preparation chamber, the feeding chamber and the cooling chamber can be opened or closed through a sealing door, a feeding chamber valve is arranged on the sealing door arranged between the feeding preparation chamber and the feeding chamber, the feeding preparation chamber valve is arranged on the feeding preparation chamber, the feeding preparation chamber is also connected with a pipeline of a vacuum pump, a feeding device is arranged below the feeding chamber, a tray is arranged on the feeding device, the feeding device can lift the tray, an upper space is arranged above the feeding chamber, the upper space is a furnace body, a transverse sealing door is arranged between the feeding chamber and the furnace body, the furnace body is connected with the cooling chamber through a pipeline and the valve on the cooling chamber on the pipeline, an air inlet and outlet system is arranged above the furnace body, and the air inlet and outlet system is a pipeline and a valve; the cooling chamber comprises a cooling chamber valve, and the cooling chamber is connected with a vacuum pump through a pipeline.
Compared with the prior art, the invention adopting the technical scheme has the following beneficial effects: the full-automatic feeding and discharging mode is adopted, the one-time production yield is high, and the metal reduction and nitriding processes are completed in the furnace body at one time; after the furnace burden is mature, the crucible can be withdrawn from the intermediate frequency furnace after being cooled to about 650 ℃ along with the furnace, the crucible enters a cooling chamber for secondary cooling, the second crucible can immediately enter the furnace body for production, the production is efficient, and the energy is saved.
Drawings
To further illustrate the present invention, further description is provided below with reference to the accompanying drawings:
FIG. 1 is a schematic diagram of the inventive structure;
wherein: a-a feeding preparation chamber, b-a feeding chamber, c-a cooling chamber, 1, a first crucible, 2, a second crucible, 3 a feeding preparation chamber valve, 4 a feeding chamber valve, 5 a cooling chamber valve, 6 a cooling chamber upper valve, 7 an air inlet and outlet system, 8-a furnace body, 9-a feeding device, 10-a material conveying frame, 11-a vacuum pump and 12-a sealing door.
Detailed Description
Embodiments of the present invention will now be described with reference to the accompanying drawings, which are not intended to limit the invention:
the production method of the vertical high-capacity efficient intermediate frequency furnace crucible is characterized in that a feeding preparation chamber a, a feeding chamber b and a cooling chamber c are sequentially arranged in the lower space and the upper space from left to right; the preparation chamber a, the feeding chamber b and the cooling chamber c can be opened or closed through a sealing door, the sealing door between the feeding preparation chamber a and the feeding chamber b comprises a feeding chamber valve 4, the feeding preparation chamber a comprises a feeding preparation chamber valve 3, the feeding preparation chamber a is also connected with a pipeline of a vacuum pump 11, a feeding device is arranged below the feeding chamber b and comprises a tray, the feeding device can lift the tray, an upper space is arranged above the feeding chamber b and is a furnace body 8, a transverse sealing door 12 is arranged between the feeding chamber b and the furnace body, the furnace body is connected with the cooling chamber c through a pipeline and a cooling chamber upper valve 6 on the pipeline, an air inlet and outlet system is arranged above the furnace body 8, and the air inlet and outlet system is a pipeline and a valve; the cooling chamber c comprises a cooling chamber valve 5 and is connected with a vacuum pump through a pipeline; the technical scheme of the invention has the following substantial technical effects and the realization process: in the use process: the first crucible 1 enters a feeding preparation chamber a, a sealing door of the feeding preparation chamber a is closed, a valve 4 of the feeding chamber is opened, a sealing door 12 of a feeding chamber b connected with a furnace body is opened, an air inlet and outlet system 7 and valves of the air inlet and outlet system are closed, the feeding preparation chamber, the feeding chamber and the furnace body are vacuumized by using a vacuum pump, a vacuum degree detection device is installed in the feeding chamber, and meanwhile, a valve 5 of a cooling chamber and a valve 6 on the cooling chamber are closed for vacuumizing treatment; when the requirement is met, nitrogen is introduced through a feeding preparation chamber valve 3 and a feeding chamber valve 4, a sealing door between a feeding preparation chamber a and a feeding chamber b is opened, a first crucible 1 is placed on a tray 9, the crucible is lifted into a furnace body through a hydraulic device, the sealing door 12 is closed, the tray 9 is withdrawn from the furnace body, a cooling chamber valve 5 and a cooling chamber upper valve 6 are opened, nitrogen is introduced, and a gas inlet and outlet system 7 is opened; the product is dried, preheated, reduced, nitrided and initially cooled in the furnace body 8; the furnace charge is cooled to 650 ℃, the sealing door 12 is opened, the tray 9 holds the first crucible 1, the sealing door between the feeding chamber b and the cooling chamber c is opened, and the first crucible 1 is moved into strong cooling.
Preferably, the cooling chamber c is formed by a double-layer hollow structure, the material is a heat-resistant and corrosion-resistant material, flowing cooling water is introduced between interlayers for auxiliary cooling, and nitrogen is continuously introduced into the chamber for auxiliary cooling; meanwhile, the furnace body is still in a high-temperature state, and the second crucible 2 enters the furnace body 8 for production through the same steps; and when the furnace burden in the first crucible 1 is cooled to 100 ℃, a sealing door of the cooling chamber can be opened, and the furnace burden finishes the discharging process.
As a further preference, the crucible conveying device further comprises a material conveying frame 10, the first crucible 1 can be fixed on the material conveying frame 10, the material conveying frame 10 comprises a hole, the first crucible 1 is fixed in the hole formed in the material conveying frame 10, and the tray can be supported by the material feeding device to penetrate through the hole formed in the material conveying frame 10. The technical scheme of the invention has the following substantial technical effects and the realization process: the material conveying frame can move the crucible to the position right above the tray, and the crucible can be conveniently moved. Preferably, the material conveying frame 10 is a frame structure, and the frame structure can move.
As a further improvement, the furnace body internally comprises a clamping structure which can clamp the crucible. The technical scheme of the invention has the following substantial technical effects and the realization process: after clamping, the lower closure door 12 is able to receive the crucible. Preferably, a position sensor is mounted on the material conveying frame 10. And the outsides of the lower space and the upper space are both vanadium-nitrogen alloy shells.
Creatively, the above effects exist independently, and the combination of the above results can be completed by a set of structure.
As a further improvement description:
the furnace burden containing device is composed of a special graphite crucible, has large capacity, high strength and allows the containing of a large amount of furnace burden; the feeding nitrogen protection device and the cooling chamber adopt sealing doors, and a nitrogen fullness detection device is arranged in the space; the gas inlet and outlet system is composed of pipelines in the figure, so that on the premise of ensuring that no air medium exists in the feeding and cooling chamber, nitrogen containing a large amount of heat flowing out of the cooling chamber can provide gas and energy for the intermediate frequency furnace; the feeding device is composed of a material supporting manipulator and a hydraulic device, the moving position on the material conveying frame is controlled through a displacement sensor, the crucible is supported to the designated position through the manipulator lifted by the hydraulic device when the crucible arrives at the designated place, and the furnace body is closed by a gate to ensure the sealing of the furnace body. The space chamber directly connected with the furnace body has high temperature, the wall body needs to adopt a double-layer structure, the inner part of the space chamber is made of heat-resistant steel, the middle part of the space chamber is added with refractory materials to play a role in heat insulation, and the outer part of the space chamber is made of heat-resistant steel to play a role in protection; the cooling chamber is made into a sandwich hollow structure, and the cooling is assisted by flowing cooling water in the cooling process. The hydraulic tray of the feeding device is positioned on the conveying frame, the process of conveying furnace materials is stable, after the material supporting is finished, the tray is withdrawn from the intermediate frequency furnace, the crucible is supported by the sealing door of the furnace body, and the production is finished in the furnace body, so that the feeding device has specific requirements on the heat resistance and the strength of the material of the feeding device.
Compared with the traditional technology, the working efficiency of the crucible is three times of the original crucible production efficiency; the required cooling time is half of the original cooling time.
The technical effect that above structure realized realizes clearly, if do not consider additional technical scheme, this patent name can also be a stove. Some details are not shown in the figures.
It should be noted that the plurality of schemes provided in this patent include their own basic schemes, which are independent of each other and are not restricted to each other, but they may be combined with each other without conflict, so as to achieve a plurality of effects.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are intended to illustrate the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, and the invention is to be limited to the embodiments described above.
Claims (7)
1. The production method of the vertical high-capacity high-efficiency intermediate frequency furnace crucible is characterized in that a feeding preparation chamber (a), a feeding chamber (b) and a cooling chamber (c) are sequentially arranged in the lower space and the upper space from left to right; the preparation chamber (a), the feeding chamber (b) and the cooling chamber (c) can be opened or closed through a sealing door, the sealing door between the feeding preparation chamber (a) and the feeding chamber (b) contains a feeding chamber valve (4), the feeding preparation chamber (a) contains a feeding preparation chamber valve (3), the feeding preparation chamber (a) is further connected with a pipeline of a vacuum pump (11), a feeding device is installed below the feeding chamber (b) and contains a tray, the feeding device can lift the tray, an upper space is arranged above the feeding chamber (b), a furnace body (8) is arranged above the upper space, a transverse sealing door (12) is arranged between the feeding chamber (b) and the furnace body, and the furnace body is connected with the cooling chamber (c) through a pipeline and a cooling chamber upper valve (6) on the pipeline, an air inlet and outlet system is arranged above the furnace body (8), and the air inlet and outlet system is a pipeline and a valve; the cooling chamber (c) comprises a cooling chamber valve (5), and the cooling chamber (c) is connected with a vacuum pump through a pipeline;
in the use process: a first crucible (1) enters a feeding preparation chamber (a), a sealing door is closed in the feeding preparation chamber (a), a valve (4) of the feeding chamber is opened, a sealing door (12) of a feeding chamber (b) connected with a furnace body is opened, an air inlet and outlet system (7) and the valve thereof are closed, the feeding preparation chamber, the feeding chamber and the furnace body are vacuumized by using a vacuum pump, a vacuum degree detection device is installed in the feeding chamber, and a valve (5) of a cooling chamber and a valve (6) on the cooling chamber are closed to perform vacuumizing treatment; when the requirement is met, nitrogen is introduced through a feeding preparation chamber valve (3) and a feeding chamber valve (4), a sealing door between a feeding preparation chamber (a) and a feeding chamber (b) is opened, a first crucible (1) is placed on a tray (9), the crucible is lifted into a furnace body through a hydraulic device, the sealing door (12) is closed, the tray (9) is withdrawn from the furnace body, a cooling chamber valve (5) and a cooling chamber upper valve (6) are opened, nitrogen is introduced, and a gas inlet and outlet system (7) is opened; the product is dried, preheated, reduced, nitrided and initially cooled in a furnace body (8); the furnace burden is cooled to 650 ℃, the sealing door (12) is opened, the tray (9) holds out the first crucible (1), the sealing door between the feeding chamber (b) and the cooling chamber (c) is opened, and the first crucible (1) is moved into the forced cooling.
2. The production method of the crucible of the vertical high-capacity high-efficiency intermediate frequency furnace as claimed in claim 1, wherein the cooling chamber (c) is formed by a double-layer hollow structure, the material is a heat-resistant and corrosion-resistant material, flowing cooling water is introduced between interlayers for auxiliary cooling, and nitrogen is continuously introduced into the chamber for auxiliary cooling; meanwhile, the furnace body is in a high-temperature state, and the second crucible (2) enters the furnace body (8) for production through the same steps; and when the furnace burden in the first crucible (1) is cooled to 100 ℃, a sealing door of the cooling chamber can be opened, and the furnace burden finishes the discharging process.
3. The production method of the vertical high-capacity efficient intermediate frequency furnace crucible as claimed in claim 1, characterized by further comprising a material conveying frame (10), wherein the first crucible (1) can be fixed on the material conveying frame (10), the material conveying frame (10) comprises a hole, the first crucible (1) is fixed in the hole formed in the material conveying frame (10), and the tray can be supported by the feeding device to penetrate through the hole formed in the material conveying frame (10).
4. The production method of the vertical high-capacity high-efficiency intermediate frequency furnace crucible as claimed in claim 3, wherein the material conveying frame (10) is of a frame structure, and the frame structure can move.
5. The method for producing the crucible of the vertical high-capacity high-efficiency intermediate frequency furnace according to claim 1, wherein the furnace body internally comprises a clamping structure which can clamp the crucible.
6. The production method of the vertical high-capacity high-efficiency intermediate frequency furnace crucible as claimed in claim 3, wherein a position sensor is installed on the material conveying frame (10).
7. The method for producing a crucible of a vertical high-capacity high-efficiency intermediate frequency furnace according to claim 3, wherein the outside of the lower space and the upper space are both vanadium-nitrogen alloy shells.
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| CN106610218B true CN106610218B (en) | 2020-03-13 |
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| CN203741207U (en) * | 2014-03-20 | 2014-07-30 | 中国建筑材料科学研究总院 | Vacuum melting furnace and founding system of infrared glass |
| JP2015064187A (en) * | 2013-09-26 | 2015-04-09 | 株式会社Ihi | High-frequency melting furnace and casting method |
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| CN2755530Y (en) * | 2004-12-03 | 2006-02-01 | 云南铜业技术中心 | Semi-continuous metallurgical furnace with three chamber |
| CN1800763A (en) * | 2005-11-08 | 2006-07-12 | 青岛科技大学 | Three-chamber type intelligent periodically controllable atmosphere furnace |
| CN101782320A (en) * | 2010-01-08 | 2010-07-21 | 河南省西保冶材集团有限公司 | Vanadium-nitrogen alloy vacuum furnace |
| CN101893373A (en) * | 2010-07-23 | 2010-11-24 | 青岛科技大学 | Vertical and horizontal efficient energy-saving vacuum controlled atmosphere furnace for continuous production |
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