CN210506423U - Special-shaped combined intermediate frequency furnace - Google Patents
Special-shaped combined intermediate frequency furnace Download PDFInfo
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- CN210506423U CN210506423U CN201921139497.XU CN201921139497U CN210506423U CN 210506423 U CN210506423 U CN 210506423U CN 201921139497 U CN201921139497 U CN 201921139497U CN 210506423 U CN210506423 U CN 210506423U
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Abstract
The utility model provides a dysmorphism combination formula intermediate frequency furnace adopts the intermediate frequency furnace top of cylindric refractory material crucible to install a dysmorphism receipts footpath bell additional, and the bell can be convenient combination and disassemble, and non-tapping side can set up fixed argon gas spray gun on the bell. The furnace mouth can carry out tapping operation, the contact area of molten steel and atmosphere is reduced, under the state of large-flow bottom-blowing argon, positive pressure is formed in the furnace through top-blowing argon, air is prevented from entering the furnace and atmosphere suction is prevented, large-flow bottom-blowing argon can be carried out during the reduction period, the reducing atmosphere in the furnace is maintained, and dehydrogenation and denitrification treatment are carried out; in the oxidation period, the partial pressure of carbon monoxide is reduced, so that the aim of removing carbon and retaining chromium preferentially is fulfilled; the furnace cover is split during feeding, so that the operation is convenient; and (4) combining a furnace cover after melting down, blowing argon from the bottom and the top, and performing decarburization, degassing and even desulfurization treatment.
Description
Technical Field
The utility model belongs to the refined field of molten metal, concretely relates to dysmorphism combination formula intermediate frequency furnace.
Background
The common intermediate frequency furnace can only melt, the smelting quality depends on the quality of raw materials, and the refining function is not realized; molten steel decarburization, dephosphorization or desulfurization can be carried out by producing oxidation slag or reduction slag, but the chemical reaction speed is slow, the decarburization effect is obvious only on carbon steel, and the decarburization effect is almost not effective on ultra-low carbon stainless steel, and particularly for producing ultra-low carbon stainless steel foundries, the products are unqualified products if the carbon content is higher than the specification a little, and if the carbon reduction needs to be introduced into refining equipment, the one-time investment is large, and the use frequency is not high.
The argon blowing at the bottom of the common intermediate frequency furnace can only remove a small amount of gas, once the argon is supplied at a large flow rate, the molten steel rolls over, the surface of the molten steel is exposed, the air is contacted, the gas suction is aggravated, and the advantage of bottom argon blowing can not be fully exerted.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects of the prior art, the utility model aims to provide a special-shaped combined intermediate frequency furnace, a special-shaped diameter-reducing furnace cover is additionally arranged above the intermediate frequency furnace adopting a cylindrical refractory material crucible, and a diameter-reducing furnace mouth is deviated to the tapping side and is tangent to the refractory material of the crucible at the side; the special-shaped reducing furnace cover can be conveniently combined and disassembled, and a fixed argon spray gun can be arranged on the non-steel-tapping side of the furnace cover. The furnace mouth can carry out tapping operation, the contact area of molten steel and atmosphere is reduced, under the state of large-flow bottom-blowing argon, positive pressure is formed in the furnace through top-blowing argon, air is prevented from entering the furnace and atmosphere suction is prevented, large-flow bottom-blowing argon can be carried out during the reduction period, the reducing atmosphere in the furnace is maintained, and dehydrogenation and denitrification treatment are carried out; in the oxidation period, the partial pressure of carbon monoxide is reduced, so that the aim of removing carbon and retaining chromium preferentially is fulfilled; the furnace cover is split during feeding, so that the operation is convenient; and (4) combining a furnace cover after melting down, blowing argon from the bottom and the top, and performing decarburization, degassing and even desulfurization treatment.
The technical scheme of the utility model as follows:
a special-shaped combined intermediate frequency furnace comprises a special-shaped diameter-reducing furnace cover 3, an intermediate frequency furnace body 8, an air brick 6 and a bottom argon blowing inlet 7; the special-shaped diameter-reducing furnace cover 3 comprises a diameter-reducing furnace mouth 1, a refractory material 2, a top argon blowing inlet 4 and a detachable furnace cover 5; the reducing furnace mouth 1 and the intermediate frequency furnace body 8 are bonded into a seamless whole through the refractory material 2, so that steel leakage is prevented when the intermediate frequency furnace body 8 rotates; the special-shaped diameter-reducing furnace cover 3 is mechanically connected with the intermediate frequency furnace body 8, namely 6M 30 bolts are uniformly distributed on the circumference between the special-shaped diameter-reducing furnace cover and the intermediate frequency furnace body for fastening to form a medium frequency furnace structure with a cover and play a role in supporting refractory materials; the non-tapping side of the special-shaped diameter-reducing furnace cover 3 is provided with a detachable furnace cover 5, the detachable furnace cover 5 is detached for convenient operation in the processes of charging, sampling and slagging, and the detachable furnace cover 5 is covered during refining, degassing, decarbonization and desulfurization.
A top argon blowing inlet 4 is formed in the non-steel-tapping side of the special-shaped diameter-receiving furnace cover 3, the top argon blowing inlet 4 is a fixed single-layer stainless steel pipe, the blowing direction points to the center of the liquid level filled with molten steel, and an argon spray gun can be communicated; the bottom of the intermediate frequency furnace body is provided with a large-size air brick 6 which can reach the air supply intensity of 0.75 standard cubic meter per minute per ton of steel, and the air brick 6 is provided with a bottom argon blowing inlet 7.
The design of the reducing furnace mouth 1 reduces the contact area of the atmosphere, a certain space is reserved between the furnace mouth and the molten steel surface, the atmosphere above the molten steel is protective atmosphere by top-blowing argon, and the furnace mouth can carry out normal steel tapping.
The process conditions of the utility model are as follows:
the refractory materials of the intermediate frequency furnace body are integrally knotted until the fixed part of the special-shaped diameter reducing furnace cover 3 is reached, and the detachable part is singly knotted;
before smelting, the detachable furnace cover 5 is detached and added with cold materials, power is supplied for melting, and the materials are smashed and added until the materials are melted down; and (4) covering, blowing argon at the bottom, blowing the argon into the furnace through a top argon blowing inlet 4 for pressure compensation when the flow reaches 0.75 standard cubic meter per ton of steel and the pressure of a diameter-reducing furnace opening is less than the atmospheric pressure.
If decarburization treatment is needed, iron scale or iron ore is added into the diameter reducing furnace mouth, top argon blowing is stopped, bottom argon blowing decarburization is carried out, and the temperature is controlled at 1650 ℃. And (4) sampling and analyzing, if the carbon is qualified, adding aluminum or ferrosilicon, carrying out reduction by blowing argon again from the top and the bottom, sampling and analyzing, and finely adjusting the components to discharge steel.
The utility model discloses the theory of operation as follows:
the utility model discloses at intermediate frequency furnace body top, install special-shaped bell additional, can conveniently disassemble, smelt in earlier stage with traditional intermediate frequency furnace technology the same reinforced melting, after the furnace charge melts down, cover the bell, the multiplicable jumbo size air brick of stove bottom to obtain higher argon gas flow, reinforce the end and blow the argon and degas, the top rifle blows the argon and does not contact with the atmosphere when having guaranteed that the molten steel rolls, effectively gets rid of harmful gas in the molten steel and mix with.
If need fall carbon treatment to the molten steel, stop the top rifle and supply argon, add oxides such as iron scale in the molten steel, utilize the bottom blowing argon, make the slag interface fully contact and carry out metallurgical reaction, because pure argon blows in, reduce carbon monoxide partial pressure, can reach the purpose of reducing carbon and protecting chromium at the lower temperature, when carbon reduces below the target value, carry out reduction treatment to the molten steel again, the decarbonization, the argon that blows of reduction all can effectively get rid of gas, remove nitrogen and hydrogen earlier stage, remove oxygen nitrogen hydrogen later stage. And removing the inclusions. The temperature of the molten steel can be controlled to rise or fall at will by induction heating and argon blowing.
The utility model discloses the advantage:
1. the bottom of the intermediate frequency furnace can adopt large-size air bricks, the flow rate reaches 8-10 times of that of argon blowing at the bottom of a common ladle or an intermediate frequency furnace, the efficiency is high, and the degassing effect is obvious.
2. The furnace mouth adopts the diameter of closing, and the pressure is greater than the atmospheric pressure when the large-traffic argon blowing in the stove, reduces the possibility that oxygen in the atmosphere gets into the stove.
3. In a furnace body, refining operations such as melting, degassing, decarburization, desulfurization and the like can be carried out; particularly, the carbon reduction treatment can be economically carried out on the ultra-low carbon stainless steel which only exceeds a little.
4. The material is suitable for a wide range of materials, not only can be used for melting and refining ferrous metal, but also is suitable for non-ferrous metal which can be melted in the atmosphere.
5. The manufacturing and using cost is low, and the method is easy to be accepted by the majority of casting users.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1: the overall structure schematic diagram of the special-shaped combined intermediate frequency furnace;
FIG. 2: a sectional structure schematic diagram of the special-shaped combined intermediate frequency furnace;
FIG. 3: a top view of the special-shaped combined intermediate frequency furnace;
the device comprises a diameter-reducing furnace mouth 1, a refractory material 2, a special-shaped diameter-reducing furnace cover 3, a top argon blowing inlet 4, a detachable furnace cover 5, an air brick 6, a bottom argon blowing inlet 7 and an intermediate frequency furnace body 8.
Detailed Description
The present invention is further described with reference to the following specific examples, but the scope of the present invention is not limited by the examples, and if one skilled in the art makes some insubstantial modifications and adaptations to the present invention based on the above disclosure, the present invention still falls within the scope of the present invention.
Example 1
The utility model provides a special-shaped combined intermediate frequency furnace, the structural formula of which is shown in figure 1, figure 2 and figure 3, the special-shaped combined intermediate frequency furnace comprises a special-shaped diameter-reducing furnace cover 3, an intermediate frequency furnace body 8, air bricks 6 and a bottom argon blowing inlet 7; the special-shaped diameter-reducing furnace cover 3 comprises a diameter-reducing furnace mouth 1, a refractory material 2, a top argon blowing inlet 4 and a detachable furnace cover 5; the reducing furnace mouth 1 and the intermediate frequency furnace body 8 are bonded into a seamless whole through the refractory material 2, so that steel leakage is prevented when the intermediate frequency furnace body 8 rotates; the special-shaped diameter-reducing furnace cover 3 is mechanically connected with the intermediate frequency furnace body 8, namely 6M 30 bolts are uniformly distributed on the circumference between the special-shaped diameter-reducing furnace cover and the intermediate frequency furnace body to be firm, so that a medium frequency furnace structure with a cover is formed and plays a role in supporting refractory materials; the non-tapping side of the special-shaped diameter-reducing furnace cover 3 is provided with a detachable furnace cover 5, the detachable furnace cover 5 is detached for convenient operation in the processes of charging, sampling and slagging, and the detachable furnace cover 5 is covered during refining, degassing, decarbonization and desulfurization.
A top argon blowing inlet 4 is formed in the non-steel-tapping side of the special-shaped diameter-receiving furnace cover 3, the top argon blowing inlet 4 is a fixed single-layer stainless steel pipe, the blowing direction points to the center of the liquid level filled with molten steel, and an argon spray gun can be communicated; the bottom of the intermediate frequency furnace body is provided with a large-size air brick 6 which can reach the air supply intensity of 0.75 standard cubic meter per ton of steel, and the air brick 6 is provided with a bottom argon blowing inlet 7.
The design of the reducing furnace mouth 1 reduces the contact area of the atmosphere, a certain space is reserved between the furnace mouth and the molten steel surface, the atmosphere above the molten steel is protective atmosphere by top-blowing argon, and the furnace mouth can carry out normal steel tapping.
Example 2
The utility model discloses install special-shaped bell additional at the intermediate frequency furnace body top, can conveniently disassemble, smelt in earlier stage with traditional intermediate frequency furnace technology the same reinforced melting, after the furnace charge melts down, cover the bell, the multiplicable jumbo size air brick of stove bottom to obtain higher argon gas flow, reinforce the end and blow the argon and degas, the top rifle blows the argon and does not contact with the atmosphere when having guaranteed that the molten steel rolls, effectively gets rid of harmful gas in the molten steel and mix with.
If need fall carbon treatment to the molten steel, stop the top rifle and supply argon, add oxides such as iron scale in the molten steel, utilize the bottom blowing argon, make the slag interface fully contact and carry out metallurgical reaction, because pure argon blows in, reduce carbon monoxide partial pressure, can reach the purpose of reducing carbon and protecting chromium at the lower temperature, when carbon reduces below the target value, carry out reduction treatment to the molten steel again, the decarbonization, the argon that blows of reduction all can effectively get rid of gas, remove nitrogen and hydrogen earlier stage, remove oxygen nitrogen hydrogen later stage. And removing the inclusions. The temperature of the molten steel can be controlled to rise or fall at will by induction heating and argon blowing.
Claims (2)
1. The utility model provides a dysmorphism combination formula intermediate frequency furnace which characterized in that: the special-shaped combined intermediate frequency furnace comprises a special-shaped diameter-reducing furnace cover (3), an intermediate frequency furnace body (8), air bricks (6) and a bottom argon blowing inlet (7); the special-shaped diameter-reducing furnace cover (3) comprises a diameter-reducing furnace opening (1), a refractory material (2), a top argon blowing inlet (4) and a detachable furnace cover (5); the reducing furnace mouth (1) and the intermediate frequency furnace body (8) are bonded into a seamless whole through the refractory material (2), so that steel leakage is prevented when the intermediate frequency furnace body (8) rotates; the special-shaped diameter-reducing furnace cover (3) is mechanically connected with the intermediate frequency furnace body (8) and plays a role in supporting refractory materials; a detachable furnace cover (5) is arranged on the non-steel-tapping side of the special-shaped diameter-reducing furnace cover (3), the detachable furnace cover (5) is detached in the processes of charging, sampling and slag striking, so that the operation is convenient, and the detachable furnace cover (5) is covered during refining, degassing, decarburization and desulfurization; a top argon blowing inlet (4) is formed in the non-steel-tapping side of the special-shaped diameter-receiving furnace cover (3), the top argon blowing inlet (4) is a fixed single-layer stainless steel pipe and can be communicated with an argon spray gun; a large-size air brick (6) is arranged at the bottom of the intermediate frequency furnace body, and a bottom argon blowing inlet (7) is arranged on the air brick (6).
2. The special-shaped combined intermediate frequency furnace of claim 1, characterized in that: the special-shaped diameter-reducing furnace cover (3) and the intermediate frequency furnace body (8) are mechanically connected into the special-shaped diameter-reducing furnace cover (3), and the mechanical connection mode is that 6M 30 bolts are uniformly distributed on the circumference for fixing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921139497.XU CN210506423U (en) | 2019-07-19 | 2019-07-19 | Special-shaped combined intermediate frequency furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921139497.XU CN210506423U (en) | 2019-07-19 | 2019-07-19 | Special-shaped combined intermediate frequency furnace |
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| Publication Number | Publication Date |
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| CN210506423U true CN210506423U (en) | 2020-05-12 |
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| CN201921139497.XU Active CN210506423U (en) | 2019-07-19 | 2019-07-19 | Special-shaped combined intermediate frequency furnace |
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| CN (1) | CN210506423U (en) |
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- 2019-07-19 CN CN201921139497.XU patent/CN210506423U/en active Active
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