CN205784632U - A kind of RH vacuum refining furnace plasma heating device - Google Patents
A kind of RH vacuum refining furnace plasma heating device Download PDFInfo
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- CN205784632U CN205784632U CN201620466272.5U CN201620466272U CN205784632U CN 205784632 U CN205784632 U CN 205784632U CN 201620466272 U CN201620466272 U CN 201620466272U CN 205784632 U CN205784632 U CN 205784632U
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- heating device
- vacuum chamber
- refining furnace
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Abstract
The utility model discloses a kind of RH vacuum refining furnace plasma heating device, it includes vacuum chamber, type cathode plasma gun, electric supply installation, positive plate and air supply system；Described type cathode plasma gun one end is connected with air supply system, and the other end stretches into internal vacuum chamber；Described positive plate is embedded in vacuum chamber base material, and electric supply installation connects type cathode plasma gun and positive plate respectively, is powered type cathode plasma gun and positive plate.Molten steel is heated in RH degasification process by the heater that this utility model is assisted by RH, reduces and even eliminates the temperature drop in RH processing procedure.
Description
Technical field
This utility model belongs to steelmaking technical field, is specifically related to a kind of RH vacuum refining furnace plasma heating device.
Background technology
RH vacuum refining furnace full name RH vacuum circulation degassing refining furnace, first applied in Germany in nineteen fifty-nine.Steel quality, from having come out since more than 50 year, because of the vacuum outgas performance of its excellence and is obviously improved, is increasingly becoming a kind of main steel secondary refining means by RH.
The RH vacuum refining furnace principle that mainly deaerates is to utilize the pressure reduction inside and outside vacuum chamber and by driving the effect of gas, is sucked in vacuum chamber by tedge by molten steel, utilizes the end vacuum environment in vacuum chamber to be de-gassed molten steel.RH Vacuum Degassing Process is general～15～20min, and degassing time is long, and temperature drop is big.In order to ensure subsequent processing continuous casting cast temperature, RH liquid steel temperature requirement of entering the station is higher, virtually adds the smelting burden of converter or LF refining furnace.Accordingly, it would be desirable to develop the heater of a set of RH auxiliary, in RH degasification process, molten steel is heated, reduce and even eliminate the temperature drop in RH processing procedure.
Utility model content
The purpose of this utility model is for above weak point, it is provided that a kind of mode of heating safe efficient, free of contamination, solves the RH vacuum refining furnace plasma heating device of this technical barrier of temperature drop.
This utility model solves above-mentioned technical problem by following technical proposals:
A kind of RH vacuum refining furnace plasma heating device, it includes vacuum chamber, type cathode plasma gun, electric supply installation, positive plate and air supply system；Described type cathode plasma gun one end is connected with air supply system, and the other end stretches into internal vacuum chamber；Described positive plate is embedded in vacuum chamber base material, and described electric supply installation connects type cathode plasma gun and positive plate respectively, electric supply installation power type cathode plasma gun and positive plate.
As preferably, the bottom of described vacuum chamber is provided with tedge and down-comer.
As preferably, the surface of steel plate inside described vacuum chamber is all covered by refractory material.
As preferably, the top of described vacuum chamber is provided with the hot-bending pipe for bleeding.
As preferably, described type cathode plasma gun side is provided with coupled cooling water pipe.
As preferably, described type cathode plasma gun rifle head is provided with a nozzle.
As preferably, described air supply system uses nitrogen and two kinds of blowing models of argon to provide source of the gas.
This utility model compared with prior art has the advantages that
(1) by plasma gun, the molten steel in entrance vacuum chamber is heated, can reduce and eliminate the liquid steel temperature loss in vacuum process, alleviate the smelting burden of converter or refining furnace.
(2) being heated molten steel by the High temperature ion of ionization during plasma gun heating, do not have scaling loss in molten steel heating process, it is high that the metal of molten steel receives rate.
(3) dielectric gas of the novel middle plasma gun of this use is available, it is possible to be actually needed, according to produce, the gas that selection is different, it is ensured that the economy that heating plasma uses.
(4) lead to supercooled water plasma gun during plasma gun heating to cool down, make nozzle obtain fully and cool down timely, prevent nozzle from burning, affect the life-span of gun body.
Accompanying drawing explanation
Fig. 1 is the structural representation of this utility model a kind of RH vacuum refining furnace plasma heating device.
Shown in figure: 1, ladle, 2, vacuum chamber, 3, hot-bending pipe, 4, type cathode plasma gun, 5, electric supply installation, 6, positive plate, 7, air supply system, 8, cooling water, 9, tedge, 10, down-comer, 11, nozzle.
Detailed description of the invention
In order to make the purpose of this utility model embodiment, technical scheme and advantage clearer, clear, complete description is carried out below in conjunction with the technical scheme in this utility model embodiment, obviously, described embodiment is section Example of the present utility model rather than whole embodiment.Based on embodiment of the present utility model, the every other embodiment that those of ordinary skill in the art are obtained on the premise of not paying creative work, broadly fall into protection domain of the present utility model.
As it is shown in figure 1, a kind of RH vacuum refining furnace plasma heating device, it includes vacuum chamber 2, type cathode plasma gun 4, electric supply installation 5, positive plate 6 and air supply system 7.Being provided with tedge 9 and down-comer 10 bottom described vacuum chamber, type cathode plasma gun 4 one end is connected with air supply system 7, and it is internal that the other end stretches into vacuum chamber 2.Air supply system uses nitrogen and argon mutually to switch blowing model and provide two kinds of sources of the gas to type cathode plasma gun 4, with the demand of satisfied different steel grades.Described positive plate 6 is embedded in vacuum chamber 2 bottom refractory material, higher owing to entering the temperature of the molten steel in vacuum chamber, carries out steam heating simultaneously, therefore the surface of steel plate inside vacuum chamber is all covered by refractory material in vacuum chamber.Described electric supply installation 5 connects type cathode plasma gun 4 and positive plate 6 respectively, electric supply installation 5 power type cathode plasma gun 4 and positive plate 6.
The operation principle that this experiment is novel: after ladle 1 is transported RH application of vacuum position by buggy ladle, is immersed molten steel certain depth by buggy ladle and ladle 1 jacking together to inserting pipe by jacking framework.After starting application of vacuum, molten steel can enter in vacuum chamber 1 along tedge 9 under vacuum chamber 1 inside and outside differential pressure and the effect inserting pipe driving gas, returns to ladle through reaction tailing edge down-comers 10 such as degassings, completes an application of vacuum circulation.When carrying out application of vacuum, arranged by hot-bending pipe 3 gas, take the gas in vacuum chamber 2 away, make the molten steel in ladle 1 be in vacuum outgas state, start plasma heating device, recirculated cooling water 8 and nitrogen or argon medium gas will be passed through in type cathode plasma gun 4, between type cathode plasma gun 4 and pre-buried positive plate 6, under the effect of electric supply installation 7, form high-temperature plasma electric arc by molten steel face, due to electricity conversion of energy high temperature heat, it is achieved that the temperature-compensating to molten steel.
The dielectric gas of plasma gun can be rotated by nitrogen argon switching air supply system.When the molten steel processed is to nitrogen sensitivity, select argon as dielectric gas；When nitrogen is not required by the molten steel processed, optional nitrogen, as dielectric gas, reduces plasma gun operating cost.
The temperature of molten steel in timing detection ladle, and adjust the input power of plasma gun in time, it is ensured that vacuum process temperature drop is in span of control.
The foregoing is only preferred embodiment of the present utility model; not in order to limit this utility model; all within spirit of the present utility model and principle, any modification, equivalent substitution and improvement etc. made, within should be included in protection domain of the present utility model.
Claims (7)
1. a RH vacuum refining furnace plasma heating device, it is characterised in that: include vacuum chamber, type cathode plasma gun, power supply
Device, positive plate and air supply system；Described type cathode plasma gun one end is connected with air supply system, and the other end stretches into vacuum chamber
Internal；Described positive plate is embedded in vacuum chamber base material；Described electric supply installation connects type cathode plasma gun and anode respectively
Plate, is powered type cathode plasma gun and positive plate.
RH vacuum refining furnace plasma heating device the most according to claim 1, it is characterised in that: the end of described vacuum chamber
Portion is provided with tedge and down-comer.
RH vacuum refining furnace plasma heating device the most according to claim 2, it is characterised in that: inside described vacuum chamber
Surface of steel plate all covered by refractory material.
4. according to the RH vacuum refining furnace plasma heating device described in any one of claims 1 to 3, it is characterised in that: described
The top of vacuum chamber is provided with the hot-bending pipe for bleeding.
RH vacuum refining furnace plasma heating device the most according to claim 1, it is characterised in that: described cathode plasma
Rifle side is provided with coupled cooling water pipe.
RH vacuum refining furnace plasma heating device the most according to claim 5, it is characterised in that: described cathode plasma
On rifle rifle head, a nozzle is installed.
RH vacuum refining furnace plasma heating device the most according to claim 1, it is characterised in that: described air supply system is adopted
Source of the gas is provided with nitrogen and two kinds of blowing models of argon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620466272.5U CN205784632U (en) | 2016-05-20 | 2016-05-20 | A kind of RH vacuum refining furnace plasma heating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620466272.5U CN205784632U (en) | 2016-05-20 | 2016-05-20 | A kind of RH vacuum refining furnace plasma heating device |
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| CN205784632U true CN205784632U (en) | 2016-12-07 |
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| CN201620466272.5U Active CN205784632U (en) | 2016-05-20 | 2016-05-20 | A kind of RH vacuum refining furnace plasma heating device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111394543A (en) * | 2020-04-15 | 2020-07-10 | 北京科技大学 | RH (relative humidity) efficient deep decarburization control method based on plasma jet |
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2016
- 2016-05-20 CN CN201620466272.5U patent/CN205784632U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111394543A (en) * | 2020-04-15 | 2020-07-10 | 北京科技大学 | RH (relative humidity) efficient deep decarburization control method based on plasma jet |
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