CN208748139U - A kind of electric furnace smelting device - Google Patents
A kind of electric furnace smelting device Download PDFInfo
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- CN208748139U CN208748139U CN201821486749.1U CN201821486749U CN208748139U CN 208748139 U CN208748139 U CN 208748139U CN 201821486749 U CN201821486749 U CN 201821486749U CN 208748139 U CN208748139 U CN 208748139U
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- electric furnace
- flue gas
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
The utility model proposes a kind of electric furnace smelting devices, it is related to technical field of ferrous metallurgy, electric furnace smelting device includes electric furnace unit and gas cleaning recovery unit, and electric furnace unit includes at least closed electric furnace, and closed electric furnace is removedly tightly connected with gas cleaning recovery unit.Gas cleaning recycling is carried out using flue gas of the gas cleaning recovery unit to generation during the entire process of closed electric furnace is powered and smelts.The utility model proposes electric furnace smelting device, make to carry out in the state of totally-enclosed to smelt and off-gas recovery, be not only able to reduce load and the energy consumption of electric stove dust, moreover it is possible to recycle the CO in electric furnace flue gas, energy-saving and emission-reduction.
Description
Technical field
The utility model relates to technical field of ferrous metallurgy, in particular to a kind of electric furnace smelting device.
Background technique
Fire door, electrode hole, upper furnace shell and the water cooling coil pipe gap of bell, bell smoke exhaust pipe in EAF Steelmaking Process at present
It is all to do so for opening-wide state primarily to the flue gas generated into furnace is mixed into a large amount of skies between external smoke exhaust pipe
Gas promotes CO (carbon monoxide) full combustion in flue gas using the oxygen in air, to reach the requirement diffused safely.But
Air has also brought a large amount of nitrogen and other inert gases into while bringing 21% oxygen into, other gas in addition to oxygen
Body still will enter in electric furnace, smoke processing system and dust pelletizing system, and nitrogen is split under high-temperature electric arc again after entering in furnace
Solution, so this smelting process will cause molten steel nitrogen pick-up, is added significantly to electric stove dust air quantity and energy consumption, on the other hand can't
CO in recovered flue gas, is unfavorable for energy conservation and environmental protection.Meanwhile as electric furnace in recent years is added using enhanced oxygen blowing spray carbon, large scale
The development of DRI (direct reduced iron) and large scale iron making water producing method, the CO content in electric furnace flue gas are substantially improved, electric furnace cigarette
It is higher and higher that gas recycles value.If firing the smelting process of method entirely using traditional open type, increase on the one hand may require that
The mixed air capacity of electric furnace flue gas increases the exhaust gas volumn of dedusting and increases dedusting energy consumption, another party while reducing dust removing effects
Face cannot recycle the CO in electric furnace flue gas, cause the loss using heat source.
Utility model content
The purpose of this utility model is to provide a kind of electric furnace smelting device, make to carry out in the state of totally-enclosed to smelt and
Off-gas recovery is not only able to reduce load and the energy consumption of electric stove dust, moreover it is possible to recycle the CO in electric furnace flue gas, energy-saving and emission-reduction.
In order to achieve the above objectives, the utility model proposes a kind of electric furnace smelting devices, wherein the electric furnace smelting device packet
Include electric furnace unit and gas cleaning recovery unit, the electric furnace unit includes at least closed electric furnace, the closed electric furnace with
The gas cleaning recovery unit is removedly tightly connected.
Electric furnace smelting device as described above, wherein the closed electric furnace passes through with the gas cleaning recovery unit
Telescopic airtight connection mechanism is removedly tightly connected, and the telescopic airtight connection mechanism includes bell smoke exhaust pipe, outside
Smoke exhaust pipe and driving hydraulic cylinder, one end of the bell smoke exhaust pipe be sealedly connected on the bell of the electric furnace and with the electric furnace
Inner cavity be connected, the other end of the bell smoke exhaust pipe is equipped with fixedly connected part, one end of the external smoke exhaust pipe with it is described
Gas cleaning recovery unit is tightly connected, and the other end of the external smoke exhaust pipe is installed with mobile connection part, the mobile connection
Part and the fixedly connected part are cylindrical in shape, and the inner wall of the mobile connection part can be sealed with the outer wall of the fixedly connected part
Cooperation, the driving hydraulic cylinder are connected on the outer wall of the mobile connection part and the mobile connection part can be driven by near and far
From the fixedly connected part.
Electric furnace smelting device as described above, wherein the fixedly connected part and the mobile connection part are water cooling cone
Shape flange, the inner wall of the mobile connection part are equipped with the first conical seal (contact) face, and the outer wall of the fixedly connected part is correspondingly provided with the
Two conical seal (contact) faces, second conical seal (contact) face can be sealed with first conical seal (contact) face to be cooperated.
Electric furnace smelting device as described above, wherein be equipped with flue gas inspection mechanism in the external smoke exhaust pipe.
Electric furnace smelting device as described above, wherein the gas cleaning recovery unit includes being connected by flue
The pre- dirt pocket of the flue gas of connection, waste heat boiler module, gas cleaning module and off-gas recovery and storage module.
Electric furnace smelting device as described above, wherein be provided with second-time burning rifle on the side wall of the pre- dirt pocket of flue gas.
Electric furnace smelting device as described above, wherein the gas cleaning recovery unit further includes flue gas emission module, institute
Flue gas emission module is stated to be connected between the gas cleaning module and the off-gas recovery and storage module by reversal valve
On the flue.
Electric furnace smelting device as described above, wherein be additionally provided with work between the flue gas emission module and the reversal valve
Property charcoal adsorbent equipment.
Electric furnace smelting device as described above, wherein the inspection of foamed slag height is additionally provided on the inner wall of the closed electric furnace
Survey mechanism and molten steel temperature testing agency.
Electric furnace smelting device as described above, wherein the inner wall of the closed electric furnace is equipped with oxygen blast mechanism and spray carbon
Mechanism.
Compared with prior art, the utility model has the characteristics that and advantage:
The utility model proposes electric furnace smelting device, using closed electric furnace and return closed electric furnace and gas cleaning
Unit is received to be tightly connected, in this way, extraneous air is difficult or seldom enters in closed electric furnace in energization smelting process, from
And reduce the exhaust gas volumn into gas cleaning recovery unit, the load and energy consumption of gas cleaning recovery unit are thereby reduced,
And the oxygen brought by air for decreasing the reducibility gas produced in closed electric furnace carries out secondary oxidation or burning,
To improve the content of reducing gas in flue gas, be conducive to further returning for reducibility gas (CO) that generates in closed electric furnace
It receives and utilizes；In addition, decreasing the red-hot electrode of furnace high-temperature by the dioxygen oxidation in air, to reduce consumption.
Detailed description of the invention
Attached drawing described here is only used for task of explanation, and is not intended to limit in any way disclosed by the utility model
Range.In addition, shape and proportional sizes of each component in figure etc. are only schematically, to be used to help the reason to the utility model
Solution is not the specific shape and proportional sizes for limiting each component of the utility model.Those skilled in the art is practical new at this
Under the introduction of type, various possible shapes and proportional sizes can be selected to implement the utility model as the case may be.
Fig. 1 be the utility model proposes electric furnace smelting device structural schematic diagram；
Fig. 2 is the structural schematic diagram of telescopic airtight connection mechanism in the utility model；
Fig. 3 is the schematic diagram of foamed slag height detection mechanism and molten steel temperature testing agency in the utility model.
Description of symbols:
1, electric furnace smelting device；10, electric furnace unit；
100, closed electric furnace；110, bell；
111, upper furnace shell；112, lower furnace shell；
113, fire door；114, bell and upper furnace shell sealing mechanism；
115, furnace cover lifting mechanism；120, electrode；
121, electrode holde；122, electrode hole sealing mechanism；
123, conductive cross arm；124, conductive cross arm and electrode rotary mechanism；
125, conductive cross arm elevating mechanism；126, short net；
127, transformer；130, with the charge pipe of sealing structure；
140, foamed slag height detection mechanism；150, molten steel temperature testing agency；
20, gas cleaning recovery unit；21, flue；
211, second-time burning rifle；22, the pre- dirt pocket of flue gas；
23, waste heat boiler module；24, gas cleaning module；
25, off-gas recovery and storage module；26, flue gas emission module；
27, reversal valve；30, telescopic airtight connection mechanism；
31, bell smoke exhaust pipe；32, external smoke exhaust pipe；
33, driving hydraulic cylinder；34, fixedly connected part；
35, mobile connection part；36, flue gas inspection mechanism.
Specific embodiment
In conjunction with the description of attached drawing and specific embodiment of the present invention, the utility model can be clearly understood
Details.But specific embodiment of the present utility model described herein, it is only used for explaining the purpose of this utility model, without
It can be understood as being limitations of the present invention in any way.Under the introduction of the utility model, technical staff is contemplated that
Any possible deformation based on the utility model, these are regarded as belonging to the scope of the utility model.
As shown in Figure 1, the utility model proposes a kind of electric furnace smelting device 1, including electric furnace unit 10 and gas cleaning are returned
Unit 20 is received, electric furnace unit 10 includes at least closed electric furnace 100, closed electric furnace 100 and 20 energy of gas cleaning recovery unit
Releasably it is tightly connected.
The utility model proposes electric furnace smelting device 1 be used for a kind of electric furnace smelting method, specifically, to closed electric furnace
After charging in 110, closed electric furnace 100 is sealed and is tightly connected closed electric furnace 100 and gas cleaning recovery unit
20, energization smelting is carried out to closed electric furnace 100, utilizes gas cleaning recovery unit 20 right during the entire process of being powered and smelting
The flue gas generated in closed electric furnace 100 carries out gas cleaning recycling.
The utility model proposes electric furnace smelting device, using closed electric furnace 100 and make closed electric furnace 100 and flue gas
Recovery Purifying unit 20 is tightly connected, in this way, extraneous air is difficult or seldom enters closed electricity in energization smelting process
In furnace 100, to reduce the exhaust gas volumn into gas cleaning recovery unit 20, gas cleaning recovery unit 20 is thereby reduced
Load and energy consumption, and decrease the oxygen brought by air of the reducibility gas produced in closed electric furnace 100 into
Row secondary oxidation or burning are conducive to the reduction generated in closed electric furnace 100 to improve the content of reducing gas in flue gas
Property gas (CO) it is further recycling and utilization；In addition, decrease the red-hot electrode of furnace high-temperature by the dioxygen oxidation in air,
To reduce consumption.
In the present invention, the fire door 113 of closed electric furnace 100, upper furnace shell 111 and lower 112 seam crossing of furnace shell and on
It is sealed by sealing structure at gap, bell central electrode hole between 111 furnace wall of furnace shell and bell 110, to guarantee
When energization is smelted, extraneous air is difficult or seldom enters in closed electric furnace 100.
The ancillary equipments such as reel cage 13 that electric furnace unit 10 further includes water cooling protective module 12 and electric furnace fascinates, can be used existing
Technology, herein without repeating.
In the utility model one optional example, as shown in Fig. 2, closed electric furnace 100 and gas cleaning recycling are single
Member 20 is removedly tightly connected by telescopic airtight connection mechanism 30, and telescopic airtight connection mechanism 30 discharges fume including bell
Pipe 31, external smoke exhaust pipe 32 and driving hydraulic cylinder 33, one end of bell smoke exhaust pipe 31 are sealedly connected on the furnace of closed electric furnace 100
It is connected on lid 111 and with the inner cavity of closed electric furnace 100, the other end of bell smoke exhaust pipe 31 is equipped with fixedly connected part 34, outside
One end of portion's smoke exhaust pipe 32 and gas cleaning recovery unit 20 are tightly connected, and the other end of external smoke exhaust pipe 32 is installed with mobile company
Fitting 35, fixedly connected part 34 and mobile connection part 35 are cylindrical in shape and mobile connection part 35 can correspond to and be set in fixedly connected part
Outside 34, the inner wall of mobile connection part 35 can be sealed with the outer wall of fixedly connected part 34 to be cooperated, and driving hydraulic cylinder 33 is connected to movement
On the outer wall of connector 35 and mobile connection part 35 can be driven close to or far from fixedly connected part 34.In this way, working as closed electric furnace
100, which fascinate, leaves the port, and when needing to separate with gas cleaning recovery unit 20, drives 35 He of mobile connection part using driving hydraulic cylinder 33
External smoke exhaust pipe 32 is separated with the realization of gas cleaning recovery unit 20, is driven far from fixedly connected part 34, closed electric furnace 100
Hydraulic cylinder 33 can not influence closed 100 furnace body of electric furnace after mobile connection part 35 is pulled away from 34 certain distance of fixedly connected part
It fascinates；When being ready for energization smelting, drive mobile connection part 35 close to fixedly connected part 34 using driving hydraulic cylinder 33, and
The outer wall sealing of the inner wall and fixedly connected part 34 that make mobile connection part 35 cooperates, and mobile connection part 35 and fixedly connected part 34 are closed
After conjunction, the sealed connection of closed electric furnace 11 and gas cleaning recovery unit 20 is realized, prevent while electric furnace smelting smoke evacuation outer
Boundary's air enters flue (bell smoke exhaust pipe 31 and external smoke exhaust pipe 32)；During entire energization is smelted, driving hydraulic cylinder
33 exert a force to mobile connection part 35 always, to guarantee that the sealing of mobile connection part 35 and fixedly connected part 34 cooperates.
In the utility model one optional example, fixedly connected part 34 and mobile connection part 35 are water cooling coning
The inner wall of orchid, mobile connection part 35 is equipped with the first conical seal (contact) face, and it is close that the outer wall of fixedly connected part 34 is correspondingly provided with the second taper
Cover.When needing to be tightly connected, pushes mobile connection part 35 to fixedly connected part 34 using driving hydraulic cylinder, keep the first taper close
Cover and the sealing of the second conical seal (contact) face cooperate.
In the utility model one optional example, external smoke exhaust pipe 32, which can according to need, is designed as bend pipe.
In the utility model one optional example, flue gas inspection mechanism (flue gas inspection is equipped in external smoke exhaust pipe 32
Instrument) 36.For detecting CO volumetric concentration in the flue gas being discharged by closed electric furnace 100.
In the utility model one optional example, gas cleaning recovery unit 20 includes being connected by flue 21
The pre- dirt pocket 22 of the flue gas of connection, waste heat boiler module 23, gas cleaning module 24 and off-gas recovery and storage module 25.
In the utility model one optional example, waste heat boiler module 23 can quick cooled flue gas, waste heat pot
Oven module 23 to the cooling velocity of flue gas up to 250 DEG C/s or more, in this way can be by the flue gas by being discharged in closed electric furnace 100
Temperature is quickly down to 300 DEG C or less by 1000 DEG C or more.
Gas cleaning module 24 can further purify the flue gas by being discharged in closed electric furnace 11, make the dustiness of flue gas
Enter the next step after reaching discharge standard.
In the utility model one optional example, gas cleaning recovery unit 20 further includes flue gas emission module 26,
Flue gas emission module 26 is connected to the cigarette between gas cleaning module 24 and off-gas recovery and storage module 25 by reversal valve 27
In feed channel 21.Can control by reversal valve 27 by the flue gas that gas cleaning module 24 flows out is to enter off-gas recovery and storage
Module 25 carries out recycling storage or is diffused into flue gas emission module 26.
In the utility model one optional example, active carbon is additionally provided between flue gas emission module 26 and reversal valve 27
Adsorbent equipment 28.
In the utility model one optional example, second-time burning rifle is provided on the side wall of the pre- dirt pocket 22 of flue gas
221.In CO concentration in flue gas < 20%, second-time burning rifle 221 can spray into oxygen into the pre- dirt pocket 22 of flue gas and promote in flue gas
CO carry out full combustion.
In the present invention, the pre- dirt pocket 22 of flue gas, waste heat boiler module 23, gas cleaning module 24, off-gas recovery
The prior art can be used with storage module 25 and flue gas emission module 26.
In the utility model one optional example, as shown in figure 3, being additionally provided with bubble on the inner wall of closed electric furnace 100
Foam slag height detection mechanism 140 and molten steel temperature testing agency 150.Pass through foamed slag height detection mechanism 140 and molten steel temperature
Testing agency 150, can smelting situation in closed 100 furnace of electric furnace of continuous observation under air-tight state now.
In the utility model one optional example, foamed slag height detection mechanism 140 and molten steel temperature testing agency
150 are mounted on the adverse circumstances that the more dirt of furnace high-temperature are born in water cooling protection mechanism, and 140 He of foam slag height detection mechanism
Molten steel temperature testing agency 150 can carry out installation and replacement outside furnace.
In the utility model one optional example, foamed slag height detection mechanism 140 and molten steel temperature testing agency
150 use the prior art.
In the utility model one optional example, oxygen blast mechanism and spray are additionally provided on the inner wall of closed electric furnace 100
Carbon mechanism.Can in closed 100 furnace of closed electric furnace by oxygen blast and spray carbon method or in which a kind of method with contain
Oxygen or carbonaceous material reaction generate CO gas, and can generate the dense of CO gas by adjusting oxygen blast or spraying the intensity of carbon to control
Degree；Meanwhile the CO gas generated in closed electric furnace 100 is recycled by the gas cleaning being tightly connected with closed electric furnace 100
Unit 20 recycles.
In the present invention, oxygen blast mechanism and Pen Tan mechanism can use the prior art.
In the utility model one optional example, when molten steel temperature testing agency 150 monitors that liquid steel temperature is higher than
At 1570 DEG C, then start oxygen blast making foamed slag using oxygen blast mechanism；Foamed slag height detection mechanism 140 monitors that clinker height is low
When 300mm, then the oxygen blast of oxygen blast mechanism and Pen Tan mechanism and the ability of spray carbon are improved, it is on the contrary then reduce oxygen mechanism and spray carbon machine
The oxygen blast of structure and the ability of spray carbon.
In the utility model one optional example, flue gas enters pre- in flue gas first after gas cleaning recovery unit 20
Dirt pocket 22 carries out burning dedusting, as CO volumetric concentration < 5% in the flue gas being discharged by closed electric furnace 100 (by closed
CO volumetric concentration is detected by the flue gas inspection mechanism 36 being arranged in external smoke exhaust pipe 32 in the flue gas that electric furnace 100 is discharged), it is secondary
Flue gas of the combustion gun 211 into the pre- dirt pocket 22 of flue gas is blown into oxygen to promote the full combustion of CO in flue gas and be down to safe model
In enclosing, as CO volumetric concentration >=5% and O in the flue gas of closed electric furnace 100 discharge2When volumetric concentration < 1%, second-time burning rifle
211 stop being blown into oxygen into the pre- dirt pocket 22 of flue gas.
In the utility model one optional example, when CO volumetric concentration in the flue gas being discharged by closed electric furnace 100
>=5% and O2When volumetric concentration < 1%, off-gas recovery and storage module 25 start to carry out recycling deposit to inner flue gas of the stove；When by close
In the flue gas that enclosed electric furnace 100 is discharged when CO volumetric concentration < 5%, flue gas is diffused by flue gas emission module 26.
In the utility model one optional example, electric furnace smelting device 1 can also include control unit, drive liquid
Cylinder pressure 33, flue gas inspection mechanism 36, reversal valve 27, second-time burning rifle 221, foamed slag height detection mechanism 140, molten steel temperature inspection
Mechanism 150, oxygen blast mechanism and Pen Tan mechanism is surveyed to be electrically connected with control unit；In this way, flue gas inspection can be received by control
Survey mechanism 36, the testing result of foamed slag height detection mechanism 140 and molten steel temperature testing agency 150 and control reversal valve 27,
The operation of second-time burning rifle 221, oxygen blast mechanism and Pen Tan mechanism.Wherein, control unit and its equal with being electrically connected for above-mentioned component
The prior art can be used, herein without repeating.
As shown in Figure 1, closed electric furnace 100 may include transformer 127, short net 126, conductive cross in the present invention
Arm 123, conductive cross arm and electrode rotary mechanism 124, conductive cross arm elevating mechanism 125, furnace cover lifting mechanism 115, electrode 120,
Electrode holde 121, electrode hole sealing mechanism 122, the charge pipe 130 with sealing structure, bell 110, bell and upper furnace shell
Sealing mechanism 114, upper furnace shell 111, fire door 113, lower furnace shell 112.Wherein, electrode hole sealing mechanism 122 prevent outside air into
Enter in furnace；Fire door 113 is closed fire door, is able to achieve and prevents outside air from entering in furnace while deslagging；Upper 111 He of furnace shell
Lower furnace shell 112 prevents outside air from entering in furnace using the closed structure of water cooling coil pipe and external application steel plate.
Now in conjunction with attached drawing 1, to the utility model proposes the smelt production of electric furnace smelting device be described in detail.
The specific steps of which are as follows:
Step 1: first time basket charging, first with conductive cross arm elevating mechanism 125 by conductive cross arm 123 and electrode
120 bottom ends are promoted at 111 top 200mm of furnace shell, then recycle furnace cover lifting mechanism 115 that bell 110 is jacked 500mm
Afterwards, after recycling conductive cross arm and electrode rotary mechanism 124 that electrode 120 and bell 110 are unscrewed to 72 ° or more of angle, smelting
50~70% furnace charges (steel scrap, carbon block, the pig iron, molten iron, DRI or mixture) of refining are added in furnace above upper furnace shell 111,
Then conductive cross arm and electrode rotary mechanism 124 are by above bell 110 and conductive cross arm 123 and 120 cycle of electrode to furnace shell, furnace
After bell 110 is declined the closure of 500mm and upper furnace shell 111 by lid elevating mechanism 115, the raise-lower hydraulic of furnace cover lifting mechanism 115
Cylinder will continue to decline 200mm and bell 110 is completely disengaged, and bell 110 has been fallen on upper furnace shell 111 by gravity, in order to prevent
Bell 110 slides, and upper 111 top of furnace shell is additionally provided with guiding fixed mechanism.It gives up it should be noted that step 1 is mainly used for being packed into
Steel, when do not need be packed into steel scrap when, the utility model proposes electric furnace smelting method then by step 2.
Step 2: furnace body is closed.The closure mechanism 114 of bell and upper furnace shell is then realized and upper furnace by the gravity of bell 110
Shell 111 seals, and the three-phase electrode hole on bell 110 is sealed by electrode hole sealing mechanism 122；The fire door 113 of electric furnace is
Closed fire door can prevent air to be entered in furnace in smelting process by fire door 113 and enter；The bell being installed on bell 110
Smoke exhaust pipe 31 is sealed with external smoke exhaust pipe 32 by fixedly connected part 34 and mobile connection part 35.
Step 3: be powered fusing.After completing step 2, transformer 127 begins through short net 126 and conductive cross arm 123 to electricity
120 power transmission of pole, then electrode 120 melts furnace charge；Entire fusion process be use closed structure carried out it is closed
Closed electric furnace 11 in carry out；
Step 4: second of basket charging, this step are mainly used for needing second when being packed into steel scrap, when not needing second
When secondary loading steel scrap, then by step 5.To the first melting batch materials 90% or more, transformer 127 can stop powering, and
After promoting electrode 120, remaining 30~50% second batch furnace charge is added in furnace according to mode described in step 1, then presses step 2
It is closed to carry out furnace body, is then carrying out energization fusing by step 3.
Step 5: being packed into DRI and slag material.To the first melting batch materials 90% or more, liquid state molten pool has been basically formed in furnace
Afterwards, DRI and slag material are initially added into.DRI and slag material after the charging system mixing by bell 110 with sealing structure
Charge pipe 130 is continuously packed into furnace by the speed of 20kg/MW.min, stops charging after reaching the additional amount set.
Step 6: carbon is sprayed in oxygen blast, this step is synchronous with step 5 to be carried out.After step 5 starts charging, using on furnace wall
Multifunctional furnace wall gun 160 (Pen Tan mechanism and oxygen blast mechanism) to molten bath in setting flow and ratio carry out oxygen blast and spray carbon,
Oxygen is sprayed into metal bath by adjusting the angle of spray gun, and carbon dust is injected in clinker, while according to foamed slag height
The monitoring result of testing agency 140 and molten steel temperature testing agency 150, the time of adjustment oxygen blast spray carbon and flow are spent, to guarantee
Reasonable foamed slag temperature and heating rate.When monitoring that liquid steel temperature is higher than 1570 DEG C, then start oxygen blast making foamed slag, steeps
When foam slag height detection mechanism 140 monitors clinker height lower than 300mm, then Multifunctional furnace wall gun control system is sent a signal to
System, to promote oxygen blast and spray the ability of carbon, ability that is on the contrary then reducing oxygen blast spray carbon.It should be noted that Multifunctional furnace wall gun
The prior art can be used.
Step 7: stirring heating, this step is synchronous with step 5 to be carried out.After step 5 starts charging, using mounted in furnace bottom
On air brick be blown into inert gas (nitrogen or argon gas) into furnace molten bath be stirred, to accelerate fusing, heating and chemistry
Reaction speed.
Step 8: smoke combustion dedusting, this step operation is through the entire smelting process of electric furnace.It is produced during electric furnace smelting
Raw flue gas is introduced into the pre- dirt pocket 22 (also referred to as burning dirt pocket) of flue gas by bell smoke exhaust pipe 31 and external smoke exhaust pipe 32, when
When flue gas inspection mechanism 36 detects CO concentration in flue gas < 5%, be mounted on burning dirt pocket side wall second-time burning rifle 211 to
The burning indoor flue gas of dedusting is blown into oxygen to promote the full combustion of CO in flue gas and be down in safe range, works as flue gas inspection
Mechanism 36 detects CO volumetric concentration >=5% and O in flue gas2When < 1%, it is mounted on the second-time burning rifle of combustion settling chamber side wall
211 stop being blown into oxygen into combustion settling chamber；
Step 9: flue gas is quickly cooled down, and flue gas enters waste heat boiler module 23 after being extracted from burning dirt pocket, through remaining
After hot pot oven module 23 is cooling, flue-gas temperature is down to 300 DEG C or less within 3 seconds；
Step 10: gas cleaning is handled subsequently into gas cleaning module 24, purified treated dust concentration
Reach requirement and enters back into off-gas recovery and memory module 25 or release later；
Step 11: off-gas recovery or release, after step 10, when the CO concentration in flue gas is fed back by flue gas inspection mechanism 36
Testing result >=5% and O2When < 1%, off-gas recovery and storage module 25 start to carry out recycling deposit to inner flue gas of the stove, work as CO
When volumetric concentration < 5%, flue gas is diffused by flue gas emission module 26.
Step 12: deslagging.Since step 6, clinker will be constantly generated in furnace, these clinkers are after accumulation to a certain extent
It can persistently be excluded by fire door 113, fire door 113 is closed fire door and prevents outside air from entering while may be implemented in deslagging
In furnace.
Step 13: tapping.When in furnace bath temperature and carbon content reach set objective after, turndown tapping can be carried out,
After tap reaches setting value, furnace body, which quickly returns, to incline to horizontal position, exposes tapping hole and guarantees there is 40% or so in furnace
Stay steel amount.
Step 14: filling sand and fettling.After tapping is completed, needs to clear up tapping hole and fill sand.Simultaneously
Resistance to material in furnace is checked and is repaired in time, the smelting of next furnace is got out.
For explaining in detail for the respective embodiments described above, purpose, which is only that, explains the utility model, in order to
It better understood when the utility model, still, these descriptions cannot be with any explanation at being limit to the utility model
System, in particular, each feature described in various embodiments can also mutual any combination, to form other implementations
Mode, in addition to there is clearly opposite description, these features should be understood to can be applied in any one embodiment, and simultaneously
It is not only limited to described embodiment.
Claims (10)
1. a kind of electric furnace smelting device, which is characterized in that the electric furnace smelting device includes electric furnace unit and gas cleaning recycling
Unit, the electric furnace unit include at least closed electric furnace, and the closed electric furnace can be torn open with the gas cleaning recovery unit
It is tightly connected with unloading.
2. electric furnace smelting device as described in claim 1, which is characterized in that the closed electric furnace and the gas cleaning are returned
It receives unit to be removedly tightly connected by telescopic airtight connection mechanism, the telescopic airtight connection mechanism includes bell row
Smoke pipe, external smoke exhaust pipe and driving hydraulic cylinder, one end of the bell smoke exhaust pipe are sealedly connected on the bell of the electric furnace simultaneously
It is connected with the inner cavity of the electric furnace, the other end of the bell smoke exhaust pipe is equipped with fixedly connected part, the external smoke exhaust pipe
One end and the gas cleaning recovery unit are tightly connected, and the other end of the external smoke exhaust pipe is installed with mobile connection part, institute
It states mobile connection part and the fixedly connected part is cylindrical in shape, and the inner wall of the mobile connection part can be with the fixedly connected part
Outer wall seal cooperation, the driving hydraulic cylinder is connected on the outer wall of the mobile connection part and can drive the mobile connection
Part is close and far from the fixedly connected part.
3. electric furnace smelting device as claimed in claim 2, which is characterized in that the fixedly connected part and the mobile connection part
It is water cooling cone-shaped flange, the inner wall of the mobile connection part is equipped with the first conical seal (contact) face, the outer wall of the fixedly connected part
It is correspondingly provided with the second conical seal (contact) face, second conical seal (contact) face can be sealed with first conical seal (contact) face to be cooperated.
4. electric furnace smelting device as claimed in claim 2, which is characterized in that be equipped with flue gas inspection machine in the external smoke exhaust pipe
Structure.
5. electric furnace smelting device as described in claim 1, which is characterized in that the gas cleaning recovery unit includes passing through cigarette
The pre- dirt pocket of flue gas, waste heat boiler module, gas cleaning module and the off-gas recovery and storage module that feed channel is connected in series.
6. electric furnace smelting device as claimed in claim 5, which is characterized in that be provided on the side wall of the pre- dirt pocket of flue gas
Second-time burning rifle.
7. electric furnace smelting device as claimed in claim 5, which is characterized in that the gas cleaning recovery unit further includes flue gas
Module is discharged, the flue gas emission module is connected to the gas cleaning module and the off-gas recovery and storage by reversal valve
On the flue between module.
8. electric furnace smelting device as claimed in claim 7, which is characterized in that the flue gas emission module and the reversal valve it
Between be additionally provided with activated carbon adsorption device.
9. electric furnace smelting device as described in claim 1, which is characterized in that be additionally provided with bubble on the inner wall of the closed electric furnace
Foam slag height detection mechanism and molten steel temperature testing agency.
10. electric furnace smelting device as described in claim 1, which is characterized in that the inner wall of the closed electric furnace, which is equipped with, to be blown
Oxygen mechanism and Pen Tan mechanism.
Priority Applications (1)
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108950132A (en) * | 2018-09-12 | 2018-12-07 | 中冶京诚工程技术有限公司 | A kind of electric furnace smelting device and method |
| CN110260672A (en) * | 2019-06-03 | 2019-09-20 | 盐城工学院 | A kind of purification of heat treatment waste gas burning and waste-heat recovery device |
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2018
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108950132A (en) * | 2018-09-12 | 2018-12-07 | 中冶京诚工程技术有限公司 | A kind of electric furnace smelting device and method |
| CN110260672A (en) * | 2019-06-03 | 2019-09-20 | 盐城工学院 | A kind of purification of heat treatment waste gas burning and waste-heat recovery device |
| CN110260672B (en) * | 2019-06-03 | 2020-12-22 | 盐城工学院 | Heat treatment waste gas combustion purification and waste heat recovery device |
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