CN214655054U - Molten iron on-line heating device suitable for smelting reduction furnace - Google Patents
Molten iron on-line heating device suitable for smelting reduction furnace Download PDFInfo
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- CN214655054U CN214655054U CN202022776373.1U CN202022776373U CN214655054U CN 214655054 U CN214655054 U CN 214655054U CN 202022776373 U CN202022776373 U CN 202022776373U CN 214655054 U CN214655054 U CN 214655054U
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- molten iron
- heating
- reduction furnace
- smelting reduction
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 273
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 136
- 238000010438 heat treatment Methods 0.000 title claims abstract description 90
- 238000003723 Smelting Methods 0.000 title claims abstract description 28
- 230000005674 electromagnetic induction Effects 0.000 claims abstract description 16
- 239000002131 composite material Substances 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 230000008018 melting Effects 0.000 abstract description 5
- 238000002844 melting Methods 0.000 abstract description 5
- 239000003292 glue Substances 0.000 abstract description 2
- 238000010079 rubber tapping Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
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Abstract
The utility model discloses an online heating device of molten iron suitable for smelting reduction furnace, it includes molten iron heating channel and electromagnetic induction heating system, the molten iron entry of molten iron heating channel front end is connected with the molten iron ditch of smelting reduction furnace taphole, and the molten iron export of rear end is connected with the swing chute, electromagnetic induction heating system's heating coil is buried underground in molten iron heating channel. The utility model discloses utilize electromagnetic induction heating system to carry out on-line heating to the molten iron that flows out melting reduction furnace, it is fast to have to carry out the temperature, and advantages such as heating efficiency height can heat qualified temperature with the molten iron in the time of extremely short, prevent that the molten iron from appearing sending out thick, tacky phenomenon, avoid taking place to glue the jar and freeze the accident, guarantee going on smoothly of follow-up production.
Description
Technical Field
The utility model relates to a molten iron on-line heating device suitable for melting reduction furnace belongs to metallurgical equipment technical field.
Background
The smelting reduction iron-making process has the characteristics of short flow, less investment, environmental protection, low production cost, high product positioning and the like, and is gradually concerned by iron-making workers.
Generally, the normal tapping temperature of the smelting reduction furnace is 1350-1400 ℃, and molten iron flows into the swing chute through the molten iron runner and then flows into the molten iron tank. The molten iron is generally subjected to molten iron pretreatment before entering the next process, the temperature of the molten iron after a series of operations such as molten iron runner and molten iron pretreatment is reduced to 150 ℃ to the maximum extent, and the direct consequences of the molten iron are that the molten iron is thickened and sticky, the molten iron is easy to cause accidents such as tank sticking and even freezing, and the subsequent cast iron production is affected very badly due to too low molten iron temperature, so that how to prevent the molten iron from being cooled is a subject faced by related technical personnel.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an online heating device of molten iron suitable for smelting reduction furnace to the drawback of prior art to improve the temperature that the molten iron got into next one before the process, guarantee to produce and go on smoothly.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an online molten iron heating device suitable for a smelting reduction furnace comprises a molten iron heating channel and an electromagnetic induction heating system, wherein a molten iron inlet at the front end of the molten iron heating channel is connected with a molten iron runner at an iron outlet of the smelting reduction furnace, a molten iron outlet at the rear end of the molten iron heating channel is connected with a swinging chute, and a heating coil of the electromagnetic induction heating system is embedded in the molten iron heating channel.
According to the molten iron on-line heating device applicable to the smelting reduction furnace, the molten iron heating channel comprises the U-shaped groove shell and the U-shaped groove-shaped permanent refractory layer arranged in the groove shell, the outer part of the permanent refractory layer is sequentially wrapped by the composite material layer and the insulating layer, the refractory molten iron pipe capable of flowing through molten iron is arranged in the permanent refractory layer, and the heating coil of the electromagnetic induction heating system is embedded in the composite material layer.
According to the molten iron on-line heating device suitable for the smelting reduction furnace, the two groups of heating coils are arranged and are respectively positioned above and below the refractory molten iron pipe.
According to the molten iron on-line heating device suitable for the smelting reduction furnace, the two molten iron heating channels are arranged, the front ends of the two molten iron heating channels are connected with the molten iron runner of the tapping hole of the smelting reduction furnace through the common molten iron inlet, and the rear ends of the two molten iron heating channels are connected with the swinging chute through the common molten iron outlet.
The above molten iron on-line heating device suitable for the smelting reduction furnace further comprises a standby channel, wherein the head end of the standby channel is connected with the molten iron inlet of the molten iron heating channel and is provided with a refractory retaining wall, and the tail end of the standby channel is connected with the molten iron outlet of the molten iron heating channel and is provided with a refractory retaining wall.
According to the molten iron on-line heating device suitable for the smelting reduction furnace, the inner wall of the ditch shell is provided with the heat insulating layer.
The utility model discloses utilize electromagnetic induction heating system to carry out on-line heating to the molten iron that flows out melting reduction furnace, it is fast to have to carry out the temperature, and advantages such as heating efficiency height can heat qualified temperature with the molten iron in the time of extremely short, prevent that the molten iron from appearing sending out thick, tacky phenomenon, avoid taking place to glue the jar and freeze the accident, guarantee going on smoothly of follow-up production.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a sectional view taken along line a-a of fig. 1.
The reference numbers in the figures are as follows: 1. a molten iron inlet; 2. molten iron; 3. a first molten iron heating channel; 4. a standby channel; 5. a molten iron outlet; 6. a trench shell; 7. an insulating layer; 8. a heating coil; 9. a heat insulating layer; 10. refractory molten iron pipes; 11. a permanent resistant layer; 12. a composite material layer; 13. a refractory retaining wall; 14. and a second molten iron heating channel.
Detailed Description
The utility model discloses utilize the online heating system of electromagnetic induction to heat for melting reduction furnace molten iron and carry the temperature, supply the heat to satisfy follow-up production needs, improve production efficiency, reduce the investment, solved the problem that prior art exists.
The utility model discloses utilize the electromagnetic induction principle, when the molten iron passes through electromagnetic induction heating system, heating system turns into heat energy to the intermediate frequency electromagnetic energy, and the electric current forms gyration closed loop in the molten iron, reaches the purpose of raising the temperature in the twinkling of an eye. Meanwhile, the heating channel adopts the combination modes of building refractory materials at the periphery, covering an insulating layer, a heat insulating layer and the like, so that the molten iron is more insulated, and the peripheral structure is protected. In addition, when the heating system needs to be overhauled temporarily, the molten iron heating channel is in short circuit, and the spare channel is used for tapping, so that the tapping operation of the smelting reduction furnace is not influenced completely.
Referring to fig. 1 and 2, the present invention mainly includes an electromagnetic induction heating system (not shown in the figure), a molten iron inlet 1, two molten iron heating passages (i.e., a first molten iron heating passage 3 and a second molten iron heating passage 14), a standby passage 4, and a molten iron outlet 5, wherein the molten iron heating passages include a trench shell 6, an insulating layer 7, a heat insulating layer 9, a refractory molten iron pipe 10, a permanent refractory layer 11, a composite material layer 12, and a refractory retaining wall 13, and a heating coil 8 of the electromagnetic induction heating system is buried in the composite material layer 12.
The working process of the utility model is as follows:
1. the normal tapping temperature of the melting reduction furnace at the iron notch is 1350-1400 ℃, and firstly, molten iron 2 enters the molten iron inlet 1 through the molten iron runner. The molten iron entering the molten iron inlet 1 is automatically guided into the first molten iron heating channel 3 and the second molten iron heating channel 14 for heating under the guide action of the refractory retaining wall 13.
2. In the first molten iron heating channel 3 and the second molten iron heating channel 14, under the action of electromagnetic induction generated by the heating coil 8, electromagnetic energy is converted into heat energy, and current forms a rotary closed loop in the molten iron 2 to heat the molten iron.
3. The heated molten iron 2 reaches the qualified temperature, flows out of the molten iron outlet 5 and enters the next production process.
4. When the first molten iron heating channel 3 and the second molten iron heating channel 14 need to be overhauled temporarily, the molten iron 2 enters the next process through the standby channel 4, and the normal tapping operation of the smelting reduction furnace is not affected.
5. As can be seen from fig. 2, in order to keep the molten iron more warm and reduce the erosion of the molten iron to the equipment, a refractory molten iron pipe 10, a permanent refractory layer 11, a composite material layer 12, an insulating layer 7 and a heat insulating layer 9 are sequentially built from inside to outside.
The utility model discloses there is following advantage:
1. the molten iron is heated quickly and efficiently, and the molten iron can be heated to a qualified temperature in a very short time.
2. The temperature rise rate of the molten iron is adjustable, and the temperature rise of the molten iron can be adjusted according to the actual tapping speed.
3. When the heating device needs to be overhauled temporarily, the iron can be discharged through the standby channel, and the iron discharging operation of the smelting reduction furnace is not influenced.
4. The heating device has no influence on the peripheral structure.
5. The heating device is modularized and integrated, and can be hoisted in a modularized mode at any time.
6. The heating device is simple and convenient to operate, and one-key operation can be realized in the operating room.
The utility model discloses can be low at smelting reduction furnace tapping temperature, under the big condition of molten iron viscosity, through the online heating system of molten iron, effectively improve the physics heat and the mobility of molten iron, greatly increased follow-up molten iron treatment process and cast iron production technology's flexibility, its maneuverability is strong, easy operation, the molten iron temperature rise is fast, does not influence the production of normal smelting reduction furnace.
Claims (6)
1. An on-line molten iron heating device suitable for a smelting reduction furnace is characterized by comprising a molten iron heating channel and an electromagnetic induction heating system, wherein a molten iron inlet (1) at the front end of the molten iron heating channel is connected with a molten iron runner at an iron outlet of the smelting reduction furnace, a molten iron outlet (5) at the rear end of the molten iron heating channel is connected with a swinging chute, and a heating coil (8) of the electromagnetic induction heating system is embedded in the molten iron heating channel.
2. The molten iron on-line heating device suitable for the smelting reduction furnace according to claim 1, wherein the molten iron heating channel comprises a U-shaped groove shell (6) and a U-shaped groove-shaped permanent refractory layer (11) arranged in the groove shell (6), the outer part of the permanent refractory layer (11) is sequentially wrapped by a composite material layer (12) and an insulating layer (7), a refractory molten iron pipe (10) through which molten iron (2) can flow is arranged in the permanent refractory layer, and a heating coil (8) of the electromagnetic induction heating system is embedded in the composite material layer (12).
3. The apparatus for heating molten iron on-line in a smelting reduction furnace according to claim 2, wherein the heating coils (8) are provided in two groups, which are respectively located above and below the refractory molten iron pipe (10).
4. The apparatus for on-line heating of molten iron in a smelting reduction furnace according to any one of claims 1 to 3, wherein two molten iron heating paths are provided, and the front ends of the two molten iron heating paths are connected to the molten iron runner of the taphole of the smelting reduction furnace through a common molten iron inlet (1), and the rear ends of the two molten iron heating paths are connected to the swing chute through a common molten iron outlet (5).
5. The molten iron on-line heating apparatus for a smelting reduction furnace according to claim 4, further comprising a spare channel (4), wherein the spare channel (4) has a head end connected to the molten iron inlet (1) of the molten iron heating channel and provided with a refractory retaining wall (13), and a tail end connected to the molten iron outlet (5) of the molten iron heating channel and provided with a refractory retaining wall (13).
6. The apparatus for on-line heating of molten iron suitable for a smelting reduction furnace according to claim 2 or 3, wherein the inner wall of the shell (6) is provided with a heat insulating layer (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022776373.1U CN214655054U (en) | 2020-11-26 | 2020-11-26 | Molten iron on-line heating device suitable for smelting reduction furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022776373.1U CN214655054U (en) | 2020-11-26 | 2020-11-26 | Molten iron on-line heating device suitable for smelting reduction furnace |
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| Publication Number | Publication Date |
|---|---|
| CN214655054U true CN214655054U (en) | 2021-11-09 |
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|---|---|---|---|
| CN202022776373.1U Active CN214655054U (en) | 2020-11-26 | 2020-11-26 | Molten iron on-line heating device suitable for smelting reduction furnace |
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| Country | Link |
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| CN (1) | CN214655054U (en) |
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- 2020-11-26 CN CN202022776373.1U patent/CN214655054U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 063000 No. 599, Ronghua West Road, Lubei District, Tangshan City, Hebei Province Patentee after: Tanggang International Engineering Technology Co.,Ltd. Address before: No. 1 Jianhua Road, North District of Tangshan City Road, Hebei Province, Hebei Patentee before: TANGSTEEL INTERNATIONAL ENGINEERING TECHNOLOGY Co.,Ltd. |
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| CP03 | Change of name, title or address | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: An online heating device for molten iron suitable for melting reduction furnaces Granted publication date: 20211109 Pledgee: Bank of Cangzhou Limited by Share Ltd. Fengnan branch Pledgor: Tanggang International Engineering Technology Co.,Ltd. Registration number: Y2024980014384 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |