CN209227012U - Steel-making device capable of continuously preheating scrap steel - Google Patents
Steel-making device capable of continuously preheating scrap steel Download PDFInfo
- Publication number
- CN209227012U CN209227012U CN201822097178.9U CN201822097178U CN209227012U CN 209227012 U CN209227012 U CN 209227012U CN 201822097178 U CN201822097178 U CN 201822097178U CN 209227012 U CN209227012 U CN 209227012U
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- vertical shaft
- scrap
- furnace
- preheating
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 242
- 239000010959 steel Substances 0.000 title claims abstract description 242
- 238000009628 steelmaking Methods 0.000 title abstract description 6
- 238000010891 electric arc Methods 0.000 claims abstract description 53
- 238000007664 blowing Methods 0.000 claims abstract description 20
- 238000007789 sealing Methods 0.000 claims abstract 2
- 238000003723 Smelting Methods 0.000 claims description 27
- 238000002485 combustion reaction Methods 0.000 claims description 25
- 238000010438 heat treatment Methods 0.000 claims description 25
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 24
- 239000000446 fuel Substances 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 2
- 238000004062 sedimentation Methods 0.000 claims description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 35
- 239000003546 flue gas Substances 0.000 abstract description 35
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 22
- 239000001301 oxygen Substances 0.000 abstract description 22
- 229910052760 oxygen Inorganic materials 0.000 abstract description 22
- 239000002699 waste material Substances 0.000 abstract description 4
- 230000000630 rising effect Effects 0.000 abstract description 3
- 238000003756 stirring Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 28
- 239000007789 gas Substances 0.000 description 22
- 230000008569 process Effects 0.000 description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 13
- 229910052799 carbon Inorganic materials 0.000 description 13
- 238000002844 melting Methods 0.000 description 13
- 239000007921 spray Substances 0.000 description 12
- 230000008018 melting Effects 0.000 description 11
- 239000002893 slag Substances 0.000 description 11
- 238000012545 processing Methods 0.000 description 7
- 238000010079 rubber tapping Methods 0.000 description 7
- 241001417490 Sillaginidae Species 0.000 description 6
- 238000001816 cooling Methods 0.000 description 5
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000011819 refractory material Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 239000003500 flue dust Substances 0.000 description 3
- 239000000155 melt Substances 0.000 description 3
- 239000012071 phase Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002737 fuel gas Substances 0.000 description 2
- 238000007499 fusion processing Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000009851 ferrous metallurgy Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Furnace Details (AREA)
Abstract
The utility model provides a steelmaking device for continuously preheating scrap steel, which comprises a scrap steel shaft, wherein the scrap steel shaft is divided into a scrap steel charging shaft and a scrap steel preheating shaft by a second shaft gate arranged on the upper part of the scrap steel shaft, and the top of the scrap steel charging shaft is provided with a first shaft gate for sealing the scrap steel charging shaft; the electric arc furnace comprises a furnace cover and a furnace body which are arranged up and down, wherein the furnace body comprises an upper furnace shell, a molten pool and a lower furnace shell which are arranged up and down in sequence; the upper furnace shell is provided with a multifunctional furnace wall gun; a flue gas outlet arranged on the upper furnace shell of the electric arc furnace is connected with an inlet of the waste steel preheating vertical shaft flue through a flue; and the vibrating feeder is used for feeding the preheated scrap steel into a molten pool of the electric arc furnace. The device provided by the utility model is a scrap steel-making device which combines scrap steel preheating, electric arc temperature rising, primary energy fluxing, furnace bottom blowing stirring (bottom blowing) and high-efficiency oxygen blowing.
Description
Technical field
The utility model relates to a kind of steel-smelting devices of continuously pre-heating steel scrap, belong to technical field of ferrous metallurgy.
Background technique
It is divided from charge mode, the eaf process and device made steel at present with steel scrap can be divided into cold charge and molten charge two
Kind mode, cold charge, that is, steel scrap is directly loadable into furnace without the pre-heat treatment to be smelted, and molten charge, that is, steel scrap needs after preheating
It is reloaded into stove and smelts.Most conventional arc furnaces are smelted by the way of cold charge, and height is relied primarily in smelting process
Warm arc-melting steel scrap and heating molten steel, but electric arc is big to steel scrap scaling loss, fusing noise is big, smelts the later period a large amount of oxygen blast of needs
Spray carbon and a large amount of slag materials of addition have made foamed slag to realize that submerged-arc smelting could improve electric arc heated efficiency, generate in furnace a large amount of
High-temperature flue gas be expelled directly out.Add steel scrap to need to unscrew bell every time simultaneously, will cause environmental pollution and energy loss.Currently,
Scrap steel preheating type electric furnace for molten charge mode mainly include horizontal continuity preheating Consteel electric furnace and with finger valve
Covered charging may be implemented in electric shaft furnace, the two, realizes that the flat molten bath of electric arc heated molten steel smelts.The preheating master of steel scrap
If the high-temperature flue gas generated during smelting steel scrap using electric furnace itself, allow these high-temperature flue gas by steel scrap to reach pre-
The effect of hot steel scrap, improve input the electric furnace energy utilization rate, but both scrap steel preheating type electric furnaces also have it is respective
Advantage and disadvantage.Wherein, Consteel furnace equipment technology maturation, failure rate are low, but due to flue gas only by pass through at the top of steel scrap because
This pre-heat effect is poor, and electric power consumption per ton steel at most saves 30kWh.And the electric shaft furnace with finger valve, since flue gas is from steel scrap
The bottom of column is to its top diffusion, and heat convection is abundant, and electric power consumption per ton steel can reduce about 100kWh, but since vertical shaft and finger valve are adopted
With water cooling steel construction, scrap steel preheating temperature is high, therefore the failure of vertical shaft and finger valve leak and steel bonding frequent occurrence, to normal raw
Production brings security risk.
Therefore it provides the steel-smelting device and technique of a kind of continuously pre-heating steel scrap have become the technology of this field urgent need to resolve
Problem.
Utility model content
In order to solve the above shortcomings and deficiencies, the utility model provides a kind of steel-smelting device of continuously pre-heating steel scrap.It should
Device is by scrap steel preheating, electric arc heat up, non-renewable energy is fluxing, (bottom blowing) is stirred in furnace bottom air blowing, the use that high effective oxygen blowing combines
Steel scrap steel-smelting device.
In order to achieve the goal above, the utility model provides a kind of steel-smelting device of continuously pre-heating steel scrap, wherein described
The steel-smelting device of continuously pre-heating steel scrap includes:
Steel scrap vertical shaft, the second vertical shaft gate which is arranged at upper part are divided into steel scrap charging vertical shaft and give up
Steel preheats vertical shaft, and is provided with the first vertical shaft gate to be sealed against at the top of steel scrap charging vertical shaft；
Electric arc furnaces, the electric arc furnaces contain bell and furnace body setting up and down, which contains the upper furnace set gradually up and down
Shell, molten bath and lower furnace shell；The upper furnace shell is equipped with Multifunctional furnace wall gun；
Exhanst gas outlet set by furnace shell is connected by flue with the entrance of the scrap steel preheating vertical well gas flue on electric arc furnaces；
Oscillating feeder is sent into the molten bath of electric arc furnaces to the steel scrap after preheating.
According to the utility model specific embodiment, in the device, the flue can be scrap steel preheating vertical shaft
Both that is, a part is that disjunctor be arranged, and certainly, the two can also carry out split settings, if guarantee may be implemented it is practical
Novel purpose.
According to the utility model specific embodiment, in the device, the bottom of the furnace body is provided with several furnace bottoms
Bottom-blowing device, the furnace bottom bottom-blowing device are connected with the molten bath.
Wherein, several furnace bottom bottom-blowing devices are centered in the dress provided by the utility model, on the one hand can increased
On the other hand the burn-off rate (stirring action) of steel scrap can also play the role of homogeneous molten steel component；In addition, this field skill
Bottom blowing quantity point and every relevant parameter can be arranged according to factors such as the size of electric arc furnaces and molten steel cold-zone points in art personnel, such as
In specific embodiment of the present invention, every relevant parameter is as follows:
Flow: 0-300L/min, pressure 0.3-0.4MPa, medium are argon gas or nitrogen.
According to the utility model specific embodiment, the steel scrap vertical shaft of the device is divided into steel scrap dress by the second vertical shaft gate
Expect vertical shaft and scrap steel preheating vertical shaft, wherein steel scrap is only preheated in scrap steel preheating vertical shaft, and the first vertical shaft gate and second
Vertical shaft gate will not be opened simultaneously, to guarantee that the flue gas after preheating is extracted under relatively steady state always and enters burning
Expansion chamber.
Specifically, dedusting fan is working always in entire smelting process first.Assuming that steel scrap vertical shaft only sets one
Vertical shaft room and a gate, then during adding steel scrap to steel scrap vertical shaft (3 minutes or so), gate are opened, at this moment a large amount of wild wind
It can be poured in from open gate, cause blower load variations, the also big ups and downs of the temperature of flue gas.And in the dress of the utility model
In setting, steel scrap vertical shaft be two vertical shaft rooms (small one and large one, wherein scrap steel preheating vertical shaft is larger, and steel scrap charging vertical shaft is smaller)
And two gates (two gates make steel scrap charging vertical shaft and scrap steel preheating vertical shaft is all closed space) is set, steel scrap is being added
Two gates will not open simultaneously in the process, and the maximum fluctuation of dedusting fan is exactly to increase (the steel scrap charging of lesser steel scrap vertical shaft
Vertical shaft) exhaust gas volumn in space, so the steel scrap vertical shaft set-up mode in the device can guarantee that the flue gas after preheating exists always
Be extracted under relatively steady state and enter combustion settling chamber (conducive to the work of blower, flue-gas temperature is easier to control, to rear
The processing of phase flue gas is advantageous).
According to the utility model specific embodiment, the borehole wall of the scrap steel preheating vertical shaft is pasted using heat-resisting cast iron plate back
Add resistance to material (fire resisting, heat proof material) structure type, the form of water-cooling wall can also be used；
The second vertical shaft gate water cooling vertical shaft flashboard；
In addition, needing to guarantee that it is sealed steel scrap charging vertical shaft when the first vertical shaft closing gate.
According to the utility model specific embodiment, which further includes vertical shaft pedestal, to support steel scrap vertical shaft.
In specific embodiment of the present invention, the side of welding or bolt fixation is can be used in the bottom of scrap steel preheating vertical shaft
Formula is connected with the surface of the vertical shaft pedestal.
According to the utility model specific embodiment, in the device, the vertical shaft pedestal is additionally provided with locking dress
It sets, to lock the vertical shaft pedestal.
According to the utility model specific embodiment, which further includes pusher, is located on vertical shaft pedestal, to incite somebody to action
Steel scrap after the preheating shifts the hopper of oscillating feeder onto, then the steel scrap after the preheating is sent into electric arc furnaces by oscillating feeder
Molten bath in.
According to the utility model specific embodiment, which further includes vertical shaft mobile device, the vertical shaft mobile device with
Vertical shaft pedestal is connected, for pulling vertical shaft pedestal so that steel scrap vertical shaft is separated with the furnace body of electric arc furnaces.
According to the utility model specific embodiment, in the device, scrap steel preheating vertical shaft and vertical shaft pedestal are located at
The side of electric arc furnaces can simultaneously be separated with electric arc furnaces, do not influence the tapping of the electric arc furnaces, slag tap, lower furnace shell hang out replacement etc. operation.
According to the utility model specific embodiment, which further includes combustion settling chamber, the scrap steel preheating vertical shaft
Exhanst gas outlet is connected via pipeline with the entrance of the combustion settling chamber；
The entrance of the combustion settling chamber and/or outlet are provided with several fuel burner nozzles.
In the utility model more preferably embodiment, the fuel burner nozzle is 3-5, the energy of every fuel burner nozzle
Power is 1.5-3MW.
According to the utility model specific embodiment, which further includes chilling tower, and the gas of the combustion settling chamber goes out
Mouth is connected via pipeline with the entrance of the chilling tower.
According to the utility model specific embodiment, in the device, the inlet of combustion settling chamber is provided with survey
Warm device.
Wherein, the temperature measuring equipment is arranged in the entrance of combustion settling chamber and in place of combustion settling chamber, to judge
Into the temperature of the flue gas in the combustion settling chamber, if the temperature of flue gas is lower than 800 DEG C, needing to start fuel burner nozzle heating should
Into the flue gas in combustion settling chamber.
According to the utility model specific embodiment, in the device, the bell is provided with electrode hole, electrode peace
In the electrode hole, the upper end of the electrode is located at outside electric arc furnaces, and the lower end of electrode is located in electric arc furnaces and stretches in molten bath；
The upper end of the electrode is connected with conductive cross arm.
Wherein, the electrode can be moved up and down with conductive cross arm.
According to the utility model specific embodiment, the steel-smelting device of the continuously pre-heating steel scrap is additionally provided with seal closure, uses
The oscillating feeder to be sealed in the flue of the scrap steel preheating vertical shaft.
In specific embodiment of the present invention, the seal closure is fixed by bolts to scrap steel preheating vertical shaft and vertical shaft bottom
On seat, so that oscillating feeder is sealed in the flue of the scrap steel preheating vertical shaft；The seal closure furnace shell on electric arc furnaces
Exhanst gas outlet direction is opened wide, and the high-temperature flue gas in electric arc furnaces is enabled to can smoothly enter into scrap steel preheating vertical shaft.
In addition, the seal closure can add the composite construction of refractory material (this field conventional refractory materials) for steel plate patch, it can also
Seal closure in the form of using water cooling.
The steel-smelting device of continuously pre-heating steel scrap described in the utility model can be adapted for a variety of different methods and be connected
The steel-making of continuous preheating scrap, in order to further be illustrated to the device of the utility model, the utility model additionally provides application
The device of the utility model carries out the process for making of continuously pre-heating steel scrap, the technique the following steps are included:
(1) be powered fusing: electric arc furnaces is powered, and melts the furnace charge in electric arc furnaces molten bath；
(2) scrap steel preheating and charging: the flue gas generated in fusion process is passed through in scrap steel preheating vertical shaft be used to preheat it is useless
Steel, and the steel scrap after preheating is added in molten bath；
(3) oxygen blast spray carbon and second-time burning: according to flow and the certain proportion oxygen blast into molten bath of setting, into clinker
Spray carbon；The CO second-time burning generated during carbon is sprayed in oxygen blast, obtains high-temperature flue gas, then the high-temperature flue gas is passed through scrap steel preheating and is erected
Preheating scrap is used in well；
(4) it slags tap；
(5) it taps.
According to the utility model specific embodiment, the technique further include steel scrap pretreatment (classification, broken, processing,
Screening), ingredient, the operation such as transhipment, be this field routine operation, those skilled in the art can be according to existing technology hand
Duan Jinhang processing, as long as guaranteeing that the purpose of this utility model may be implemented.
According to the utility model specific embodiment, in the technique, the scrap steel preheating, is blown electrode melting
Oxygen spray carbon can carry out simultaneously.
According to the utility model specific embodiment, the processing step (1) further includes in melting batch, according to one
Certainty ratio is blown into oxygen into molten bath to accelerate load melting operation.
According to the utility model specific embodiment, the technique further includes in step (1)-(3) by furnace bottom bottom
Blowing apparatus is blown into the operation of bottom blown gas into molten bath.
According to the utility model specific embodiment, (2) scrap steel preheating and charging the step of the technique, specifically include with
Lower step:
Steel scrap after preheating is pushed into the hopper of oscillating feeder in batches using pusher, then should by oscillating feeder
Steel scrap after preheating is sent into the molten bath of electric arc furnaces；After steel scrap after pushing preheating reaches preset number, scrap steel preheating is perpendicular
Well can vacate certain space, and opening the second vertical shaft gate at this time makes the steel scrap in the steel scrap charging vertical shaft fall into scrap steel preheating
In vertical shaft, closes the second vertical shaft gate and continue to preheat；The first vertical shaft gate is opened again, is continued into steel scrap charging vertical shaft
After steel scrap is added, the first vertical shaft gate is closed, repetition is above to be added steel scrap into scrap steel preheating vertical shaft and steel scrap charging vertical shaft
And the operation that it is preheated.
It wherein, can be according to field operation in the process for making of the continuously pre-heating steel scrap provided by the utility model
Need rationally to control the frequency that steel scrap is added into steel scrap charging vertical shaft (i.e. with certain frequency interruption charging)；But this is practical
The novel mode for this being added into steel scrap charging vertical shaft steel scrap does not do specific requirement, in one specific embodiment of the utility model
In, it can be fed by the way of skew bridge trolley into steel scrap charging vertical shaft, as long as meeting the feeding frequency.
According to the utility model specific embodiment, the technique further includes that the flue gas after preheating is passed through to burning sedimentation
It is handled in room and in 800 DEG C of temperatures above, gained gas after processing is then passed through chilling tower again and is cooled to 200
DEG C operation below.Wherein, treated that gas can send to flue gas dust collecting system continues to handle for chilling tower.
According to the utility model specific embodiment, in the technique, scrap smelting process uses and stays steel, slag is stayed to grasp
Make, and steel scrap is heated in a manner of electric arc heated, oxygen blast spray carbon, oxygen and the fluxing energy supply combined of fuel gas buring
And into the high-temperature flue gas whole process importing steel scrap charging vertical shaft for melting, while being generated during smelting scrap steel and in access shaft
Steel scrap preheated, molten bath is melted in the pusher point multiple batches of push-in furnace of the steel scrap after preheating, scrap steel preheating be with
The mode of certain period approximate continuous is preheated；Recycle Multifunctional furnace wall gun or flush type oxygen rifle high effective oxygen blowing, spray
Carbon dust making foamed slag is to realize submerged-arc smelting, while electric arc heated can continue to molten steel heating to qualified tapping temperature, entire smelting
Refining process electric arc is heated to molten steel always, and steel scrap melts in high-temperature molten steel, and chemical reaction also occurs in metal liquid phase, electric arc
It works under the situation of flat bath molten bath completely.
The flue gas after preheating is passed through in combustion settling chamber again and is handled in 800 DEG C of temperatures above, can be protected at this time
Card exhaust gas in dioxin sufficiently crack, then again by after processing gained gas be passed through chilling tower and be cooled to 200 DEG C hereinafter,
It can be generated again to avoid dioxin at this time, to reach the environmental emission standard of national regulation.
According to the utility model specific embodiment, in the processing step (1), the furnace charge is to stay steel, works as electricity
Have that when staying steel, then the process for making of the continuously pre-heating steel scrap can be operated according to above step (1)-(5) in arc furnace；
It is smelted if the first time of new furnace lining, i.e., does not stay steel in electric arc furnaces, need to generate in furnace in electric arc furnaces at this time
Steel is stayed, specifically includes the following steps:
Firstly, rising conductive cross arm to mention electrode in furnace lid, bell and electrode pass through rotating mechanism together
Unscrewing a certain number of steel scraps amount of steel requirement (meet stay in molten bath) is added in molten bath with scrap steel basket, then cycle again
Bell and electrode；It subsequently powers on to melt the steel scrap, obtains described staying steel.
According to the utility model specific embodiment, in the technique, all steel scraps all pass through after second heat
Be sent in molten bath melted again after crossing preheating, scrap steel preheating be carried out in a manner of certain period approximate continuous it is pre-
Heat.
According to the utility model specific embodiment, in the technique, the flue dust in entire steelmaking process is in phase
Have passed through steel scrap to the flue dust for being extracted, while extracting out in the state of stabilization must adsorb (i.e. preheating of the flue gas for steel scrap), and
And be added by the way of unscrewing furnace lid without large quantities of steel scraps (in addition to first time feeds), reduce flue dust in steelmaking process
Discharge, and then reduce the power of dedusting fan.
Secondly, in the technique, using staying steel remaining slag operation, with stay steel transmitting energy to accelerate melting waste steel,
Electric arc only heats molten steel, realizes that flat molten bath smelts, and electric arc heated is more steady, and noise is lower, impacts to power grid small；Tool
For body, in this application, feed pattern and scrap melting mode ensure that flat molten bath smelts: smelting start in front furnace body first
There is certain molten steel (staying steel amount)；Secondly feed pattern, the steel scrap in steel scrap vertical shaft is in entire smelting process by pushing away steel
Machine and oscillating feeder are added in molten bath in batches, and electrode arc heats molten steel, molten steel heat transfer steel scrap and melting waste steel, every batch of
Additional amount and the heating power of electrode arc match, guarantee feeds next time when, the steel scrap of last charging has become
Liquid is not largely changed steel scrap and is accumulated in molten bath, and electrode arc is heated to molten steel always, and (tradition is useless with arc-melting
Steel) realize that flat molten bath smelts.
In addition, the technique provided by the utility model is helped using logical electric arc heated, oxygen blast spray carbon, oxygen and fuel gas buring
The energy supply mode that melt-phase combines is heated and is melted to steel scrap simultaneously, while furnace bottom bottom-blowing device is arranged, and is increased useless
Steel burn-off rate, homogeneous molten steel composition；And flue gas secondary combustion and flue gas and high-temperature flue gas preheating scrap, dioxin cracking are tied
Altogether, the synthesis again that flue gas avoids dioxin is quickly cooled down by chilling tower.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Attached drawing needed in description is briefly described, it should be apparent that, the accompanying drawings in the following description is the utility model
Some embodiments for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other attached drawings.
Fig. 1 is the structural schematic diagram of the steel-smelting device of the continuously pre-heating steel scrap provided by the utility model embodiment 1.
Main Reference label declaration:
1, furnace body；2, lower furnace shell；3, Multifunctional furnace wall gun；4, furnace bottom bottom-blowing device；5, electrode；6, molten bath；7, bell；8,
Conductive cross arm；9, oscillating feeder；10, locking device；11, seal closure；12, vertical shaft pedestal；13, vertical shaft mobile device；14, it fires
Gas burner；15, combustion settling chamber；16, chilling tower；17, temperature measuring equipment；18, pusher；19, the second vertical shaft gate；20, first
Vertical shaft gate；21, steel scrap charging vertical shaft；22, scrap steel preheating vertical shaft；Furnace shell on 23.
Specific embodiment
In order to which the technical characteristics of the utility model, purpose and beneficial effect are more clearly understood, now in conjunction with following
Specific embodiment the technical solution of the utility model is carried out it is described further below, but should not be understood as to the utility model can
The restriction of practical range.
Embodiment 1
A kind of steel-smelting device of continuously pre-heating steel scrap is present embodiments provided, structural schematic diagram is as shown in Figure 1, from Fig. 1
In as can be seen that described device include:
Steel scrap vertical shaft, the second vertical shaft gate 19 which is arranged at upper part are divided into steel scrap charging vertical shaft 21
And scrap steel preheating vertical shaft 22, and the top of steel scrap charging vertical shaft 21 is provided with the first vertical shaft gate 20 to be sealed against；
Vertical shaft pedestal 12, to support steel scrap vertical shaft；The vertical shaft pedestal 12 is additionally provided with locking device 10, to lock this
Vertical shaft pedestal 12；
Vertical shaft mobile device 13, the vertical shaft mobile device 13 are connected with vertical shaft pedestal 12, for pull vertical shaft pedestal 12 with
Separate steel scrap vertical shaft with the furnace body 1 of electric arc furnaces；
Electric arc furnaces, the electric arc furnaces contain bell 7 and furnace body 1 setting up and down, and the furnace body 1 is upper containing setting gradually up and down
Furnace shell 23, molten bath 6 and lower furnace shell 2；The upper furnace shell 23 is equipped with Multifunctional furnace wall gun 3；Furnace shell 23 is equipped with exhanst gas outlet on this,
Lower furnace shell is equipped with slag notch, tapping hole；
Exhanst gas outlet set by furnace shell 23 passes through the entrance of flue and 22 flue of scrap steel preheating vertical shaft on electric arc furnaces
It is connected；
The bottom of the furnace body 1 is provided with several furnace bottom bottom-blowing devices 4, which is connected with the molten bath 6
It is logical；
The bell 7 is provided with electrode hole, and electrode 5 is mounted in the electrode hole, and the upper end of the electrode 5 is located at electric arc furnaces
Outside, the lower end of electrode 5 is located in electric arc furnaces and stretches in molten bath 6；
The upper end of the electrode 5 is connected with conductive cross arm 8, and the electrode 5 can be moved up and down with conductive cross arm 8；
Oscillating feeder 9 is sent into the molten bath 6 of electric arc furnaces to the steel scrap after preheating；
In the present embodiment, the steel-smelting device of the continuously pre-heating steel scrap is additionally provided with seal closure 11, and seal closure 11 uses bolt
It is fixed on scrap steel preheating vertical shaft 22 and vertical shaft pedestal 12, so that oscillating feeder 9 is sealed in the scrap steel preheating vertical shaft 22
In flue；The seal closure 11 only open wide on electric arc furnaces by the exhanst gas outlet direction of furnace shell 23, so that the high-temperature flue gas in electric arc furnaces
Scrap steel preheating vertical shaft 22 can be can smoothly enter into；
The seal closure 11 is the composite construction of steel plate patch plus refractory material (this field conventional refractory materials), can also be used
The seal closure of water cooling form；
Pusher 18 is located on vertical shaft pedestal 12, the steel scrap after the preheating to be shifted onto the material of oscillating feeder 9
Bucket, then the steel scrap after the preheating is sent into the molten bath 6 of electric arc furnaces by oscillating feeder 9；
Combustion settling chamber 15, the exhanst gas outlet of the scrap steel preheating vertical shaft 22 enter via pipeline and the combustion settling chamber 15
Mouth is connected；
The smoke inlet of the combustion settling chamber 15 is provided with several fuel burner nozzles 14；The flue gas of the combustion settling chamber 15 enters
Temperature measuring equipment 17 is additionally provided at mouthful；
The gas vent of chilling tower 16, the combustion settling chamber 15 is connected via pipeline with the entrance of the chilling tower 16, should
The gas vent of chilling tower 16 is connected by pipeline with the flue gas dust collecting system.
Embodiment 2
A kind of process for making of continuously pre-heating steel scrap is present embodiments provided, which is the company provided using embodiment 1
What the steel-smelting device of continuous preheating scrap was realized, wherein the process for making of the continuously pre-heating steel scrap comprising the following specific steps
Step (1): first time blow-on lid charging.
This step be primarily adapted for use in new furnace lining first time smelt, steel is stayed in furnace for generating, when have in furnace stay steel when,
Then by step (2).Electrode is mentioned electric furnace specifically includes the following steps: first rising conductive cross arm by the step (1)
In lid, bell and electrode are unscrewed together by rotating mechanism (not showing in Fig. 1), with scrap steel basket that a certain number of steel scraps are (full
The amount of steel requirement is stayed in sufficient molten bath) it is added in molten bath, then cycle bell and electrode again.
Step (2): electrode melting and oxygen combustion are fluxing.
After completing step (1), conductive cross arm band moving electrode decline and the steel scrap starting the arc, and electric arc thermal energy melting waste steel is utilized,
Conductive cross arm lifting control arc length is controlled by electrode adjusting system (not showing in Fig. 1) to melt to furnace charge；Oxygen combustion
It is fluxing to be carried out simultaneously with electrode melting, and can use the Multifunctional furnace wall gun being mounted on furnace wall in furnace, according to certain
Ratio is blown into oxygen into molten bath, to play the fluxing function of burner, accelerates load melting operation.
Step (3): it charges for the first time in steel scrap vertical shaft.
This step (3) can carry out simultaneously with step (2).It (is not indicated in Fig. 1 by steel scrap skew bridge trolley；Feeding form
This patent does not constrain；Meet the feeding period) steel scrap is added in steel scrap vertical shaft.
Step (4): steel molten bath is stayed to be formed.
During executing step (2)-(3), steel scrap persistently melts, and step can be carried out after staying steel molten bath to be formed
(6)。
Step (5): scrap steel preheating.
During completing step (2)-(4), the high-temperature flue gas generated in energization fusion process can be imported into scrap steel preheating
To be preheated to the steel scrap in the scrap steel preheating vertical shaft in vertical shaft.
Step (6): endless form feed pattern in steel scrap vertical shaft.
Steel scrap after step (5) preheating is pushed into the hopper of oscillating feeder in batches using pusher, then by the vibration
Steel scrap after preheating is sent in molten bath by batcher；After pusher reaches preset number, one can be vacated in scrap steel preheating vertical shaft
The second vertical shaft gate is at this time opened in fixed space, so that the steel scrap in steel scrap charging vertical shaft is fallen into scrap steel preheating vertical shaft, closes
The second vertical shaft gate is closed to preheat to steel scrap, then opens the first vertical shaft gate, is charged and is erected to steel scrap using skew bridge trolley
Steel scrap is added in well, turns off the first vertical shaft gate after the completion of charging, and so on into next cyclically charging period；
Circulation step are as follows: steel scrap in scrap steel preheating vertical shaft in scrap steel preheating-scrap steel preheating vertical shaft after preheating in batches by
Release and (vacate the space for accommodating steel scrap in steel scrap charging vertical shaft)-open the second vertical shaft gate, blanking-closing the second vertical shaft lock
The first vertical shaft of door-opening gate-charging-closing the first vertical shaft gate into steel scrap charging vertical shaft.
Step (7): carbon is sprayed in oxygen blast.
When the intracorporal molten bath of furnace has been formed, it can synchronize and carry out oxygen blast spray carbon operation, using on furnace wall
Multifunctional furnace wall gun carries out oxygen blast and spray carbon in the flow and ratio of setting to molten bath, by adjusting Multifunctional furnace wall gun spray gun
Angle sprays into oxygen in metal bath, and carbon dust is injected in clinker, reasonable foamed slag thickness is formed and guarantees molten steel
Heating rate.
Step (8): the second-time burning of flue gas.
Smelting process can generate a large amount of CO gas (primary combustion) during spray carbon is oxygen blown, these gases into
Before entering scrap steel preheating vertical shaft, due to there is new air to be supplemented in, (the new air refers to from scrap steel preheating vertical shaft 22 and furnace body 1
Between gap be supplemented in come air, wherein in the design process, can the device scrap steel preheating vertical shaft 22 and furnace body 1
Between there are certain gaps), and flue-gas temperature at this time be much larger than 650 DEG C, the second-time burning of CO gas then just has occurred,
Second-time burning heat release increases the temperature of flue gas further, and the flue gas after these temperature increase is drawn into scrap steel preheating vertical shaft,
Continue the steel scrap in preheating scrap preheating vertical shaft, reduces the energy consumption entirely smelted.
Step (9): bottom blowing.
During step 2- (8), the furnace bottom bottom-blowing device of furnace bottom setting can be opened stage by stage is blown into bottom into molten bath
Blowing increases heat transfer efficiency to stir molten steel, accelerates the fusing of steel scrap, and play the role of homogeneous molten steel composition.
Step (10): it slags tap.
Since step (7), clinker will be constantly generated in furnace, these clinkers can pass through upper furnace after accumulation to a certain extent
Slag notch set by shell is persistently discharged.Before deslagging, steel scrap vertical shaft is separated with furnace body using vertical shaft mobile device, at this time just not
It will affect fascinating for furnace body when slagging tap.
Step (11): tapping.
After completing step (9), after liquid steel temperature and component content reach set objective in molten bath in furnace, it can pass through
Tapping hole set by upper furnace shell discharges it.Before tapping, steel scrap vertical shaft is separated with furnace body using vertical shaft mobile device, at this time
Furnace body fascinates when just will not influence tapping.
Claims (10)
1. a kind of steel-smelting device of continuously pre-heating steel scrap, which is characterized in that the steel-smelting device of the continuously pre-heating steel scrap includes:
Steel scrap vertical shaft, the second vertical shaft gate (19) which is arranged at upper part are divided into steel scrap charging vertical shaft (21)
And scrap steel preheating vertical shaft (22), and the first vertical shaft gate (20) is provided with to its is close at the top of steel scrap charging vertical shaft (21)
Envelope；
Electric arc furnaces, the electric arc furnaces contain bell setting up and down (7) and furnace body (1), which contains sets gradually up and down
Upper furnace shell (23), molten bath (6) and lower furnace shell (2)；The upper furnace shell (23) is equipped with Multifunctional furnace wall gun (3)；
Exhanst gas outlet set by furnace shell (23) passes through the entrance of flue and scrap steel preheating vertical shaft (22) flue on electric arc furnaces
It is connected；
Oscillating feeder (9) is sent into the molten bath (6) of electric arc furnaces to the steel scrap after preheating.
2. the apparatus according to claim 1, which is characterized in that the bottom of the furnace body (1) is provided with several furnace bottom bottom blowings
Device (4), the furnace bottom bottom-blowing device (4) are connected with the molten bath (6).
3. the apparatus according to claim 1, which is characterized in that the steel-smelting device of the continuously pre-heating steel scrap is additionally provided with sealing
It covers (11), the oscillating feeder (9) to be sealed in the flue of the scrap steel preheating vertical shaft (22).
4. the apparatus according to claim 1, which is characterized in that the device further includes vertical shaft pedestal (12), useless to support
Steel vertical shaft；
The vertical shaft pedestal (12) is additionally provided with locking device (10), to lock the vertical shaft pedestal (12).
5. device according to claim 1-4, which is characterized in that the device further includes pusher (18), position
In on vertical shaft pedestal (12), the steel scrap after the preheating to be shifted onto the hopper of oscillating feeder (9), then by oscillating feeder
(9) steel scrap after the preheating is sent into the molten bath (6) of electric arc furnaces.
6. device according to claim 1-4, which is characterized in that the device further includes vertical shaft mobile device
(13), which is connected with vertical shaft pedestal (12), for pull vertical shaft pedestal (12) so that steel scrap vertical shaft with
The furnace body (1) of electric arc furnaces separates.
7. device according to claim 1-4, which is characterized in that the device further includes combustion settling chamber (15),
The exhanst gas outlet of the scrap steel preheating vertical shaft (22) is connected via pipeline with the entrance of the combustion settling chamber (15)；
The entrance of the combustion settling chamber (15) and/or outlet are provided with several fuel burner nozzles (14).
8. device according to claim 7, which is characterized in that the device further includes chilling tower (16), the burning sedimentation
The gas vent of room (15) is connected via pipeline with the entrance of the chilling tower (16).
9. device according to claim 7, which is characterized in that the inlet of combustion settling chamber (15) is provided with temperature measuring equipment
(17)。
10. device according to claim 1-4, which is characterized in that the bell (7) is provided with electrode hole, electricity
Pole (5) is mounted in the electrode hole, and the upper end of the electrode (5) is located at outside electric arc furnaces, and the lower end of electrode (5) is located in electric arc furnaces simultaneously
It stretches in molten bath (6)；
The upper end of the electrode (5) is connected with conductive cross arm (8).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201822097178.9U CN209227012U (en) | 2018-12-13 | 2018-12-13 | Steel-making device capable of continuously preheating scrap steel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822097178.9U CN209227012U (en) | 2018-12-13 | 2018-12-13 | Steel-making device capable of continuously preheating scrap steel |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111321272A (en) * | 2018-12-13 | 2020-06-23 | 中冶京诚工程技术有限公司 | Steelmaking device and process for continuously preheating scrap steel |
| CN111647715A (en) * | 2020-06-15 | 2020-09-11 | 沈阳科维润工程技术有限公司 | Scrap steel preheating control system and control method |
| CN112195303A (en) * | 2020-10-30 | 2021-01-08 | 中冶京诚工程技术有限公司 | Steelmaking workshop process arrangement structure with horizontal continuous charging electric furnace |
| CN115679036A (en) * | 2022-10-31 | 2023-02-03 | 辽宁省沈抚改革创新示范区东大工业技术研究院 | Low-carbon and low-oxygen plasma electric furnace steelmaking device containing hydrogen and steelmaking method |
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2018
- 2018-12-13 CN CN201822097178.9U patent/CN209227012U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111321272A (en) * | 2018-12-13 | 2020-06-23 | 中冶京诚工程技术有限公司 | Steelmaking device and process for continuously preheating scrap steel |
| CN111647715A (en) * | 2020-06-15 | 2020-09-11 | 沈阳科维润工程技术有限公司 | Scrap steel preheating control system and control method |
| CN112195303A (en) * | 2020-10-30 | 2021-01-08 | 中冶京诚工程技术有限公司 | Steelmaking workshop process arrangement structure with horizontal continuous charging electric furnace |
| CN112195303B (en) * | 2020-10-30 | 2024-04-19 | 中冶京诚工程技术有限公司 | Process arrangement structure of steelmaking workshop with horizontal continuous charging electric furnace |
| CN115679036A (en) * | 2022-10-31 | 2023-02-03 | 辽宁省沈抚改革创新示范区东大工业技术研究院 | Low-carbon and low-oxygen plasma electric furnace steelmaking device containing hydrogen and steelmaking method |
| CN115679036B (en) * | 2022-10-31 | 2024-05-14 | 辽宁省沈抚改革创新示范区东大工业技术研究院 | Low-carbon and low-oxygen hydrogen-containing plasma electric furnace steelmaking device and steelmaking method |
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