CN205690871U - A kind of electric arc furnace sealed feeding device - Google Patents
A kind of electric arc furnace sealed feeding device Download PDFInfo
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- CN205690871U CN205690871U CN201620504722.5U CN201620504722U CN205690871U CN 205690871 U CN205690871 U CN 205690871U CN 201620504722 U CN201620504722 U CN 201620504722U CN 205690871 U CN205690871 U CN 205690871U
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- arc furnace
- electric arc
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- feeding device
- sealed feeding
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Abstract
The utility model discloses a kind of electric arc furnace sealed feeding device, belong to metallurgical technology field, device includes that it exports the airtight charge chute that connect airtight with electric arc furnace sidewall and the swinging arc formula backgauge hermatic door being arranged in airtight charge chute, airtight charge chute is divided into cold steel scrap storage room and charging dirt pocket by described swinging arc formula backgauge hermatic door, and under the effect of drive mechanism, cold steel scrap storage room is cut off with charging dirt pocket or connected.This utility model makes electric arc furnace produce more energy-saving and environmental protection；And equipment is simple, it is simple to safeguard, have the advantage of huge investment and construction；Meanwhile, this utility model is applicable not only to old eaf renovation, is also applied for newly-built electric arc furnace project, and its adaptability is extensive.
Description
Technical field
This utility model belongs to metallurgical technology field, and the airtight of adjustable discharging point being specifically related to a kind of electric arc furnace quickly adds
Material device.
Background technology
Energy-saving and cost-reducing, environmental protection in electric-arc furnace steelmaking, automatization be all the time EAF steelmaking technology development core technology it
One.
Electric-arc furnace steelmaking power-saving technology is shortened the heat, airtight covered charging, reduce charging times, steel scrap cigarette
Gas preheating etc. is the power-saving technology in common production technology.Wherein, the electric arc furnace steel scrap flue gas risen from the eighties in last century
Preheating technology is typical power-saving technology, Typical Representative such as finger shaft (DE4025249A1-1992), vibration continuous charging
CONSTEEL (US5400358-1992), vertical shaft side push away charging (US2007/0013112A1) etc., these scrap steel preheating technology
Use, reduce the melting electric consumption of electric arc furnace.But scrap steel preheating also brings negative effect, and on the one hand scrap preheater has relatively
Many plant maintenances, on the other hand the use of scrap steel preheating technology brings additional environmental issue, scrap steel preheating type electric arc furnace
Being multiplied of two English in flue gas is put than conventional arc fire grate.Along with environmental protection policy perform increasingly stricter, various countries are new
Environmental regulation formally proposes control requirement to the discharge of electric-arc furnace steelmaking two English, such as China, in new environmental protection policy electric arc furnace without
The scrap steel preheating technology of flue gas quenching has been subjected to limit.After electric arc furnace scrap steel preheating, flue gas quenching refers to following two steps
Suddenly, by discharge after scrap steel preheating less than temperature flue gas inside combustion-compensating device with natural gas or coal gas heating by ignition again to 850
～900 DEG C, maintain more than 3 seconds so that two Yingcheng are divided and the most fully decomposed；In flue gas quenching tower, flue-gas temperature is existed
By high temperature the coldest (3 seconds) but to less than 200～250 DEG C, flue gas quickly cools down and inhibits two English in flue gas cooling procedure
Synthesis again.But exhaust gas volumn and flue-gas temperature are unstable in the electric arc furnace production cycle, flue gas afterburning and chilling bring standard
Really Synchronization Control is relatively difficult, therefore after flue gas afterburning and chilling, energy loss can corrode scrap steel preheating most economize on electricity energy,
In view of the maintenance cost of increase equipment, scrap steel preheating technology is used to bring higher cost in the area that environmental requirement is higher,
Thus the waste heat in more employing Steam Recovery flue gas.Certainly, if it is possible to pay during reducing by two English environmental protection treatment
Cost, scrap steel preheating technology still has good market.
Analyze from the production technology of electric arc furnace, reduce and uncap number of times or covered sealed feeding is also an important joint
Can environmental protection produce technological means, uncapping charging not only can cause substantial amounts of heat leakage (meeting every time uncapped cause energy consumption 10～
15kwh/ ton steel, the every heat of conventional arc stove is uncapped 2～3 times)；Uncap charging process contamination production environment, add production
The dust emission of process, needs to increase the dedusting air quantity in whole workshop；Charging increased periods non-cutting time of steelmaking process, increase
Add energy consumption；And add the action of arc furnace equipment (bell, electrode etc.), the maintenance of arc furnace equipment can be increased accordingly.Subtract
Typical example of uncapping less is the basket feeding technique that electric arc furnace produces, but a basket feeding technique brings again stove sizes (dress
The volume of steel scrap) strengthen problem, rise fall of electrodes stroke strengthens (affecting transverse arm system), crane absolute altitude, factory building height etc. and also can be subject to
To impact, investment and other usefulness are again negative.
If it is possible to realize the covered charging of conventional arc stove, even if steel scrap cold burden adds, the most also can be to electric arc
Stove has produced certain energy-conserving action, and improves the production environment in electric arc furnace workshop, and eliminate that scrap steel preheating brings is additional simultaneously
Two English discharge the problem (consistent with conventional arc stove) that is multiplied, and improve smelting environment in stove, improve steel quality.
It may be further contemplated, owing to electric arc furnace flue-gas temperature high point is up to more than 1800 DEG C.The Exposure degree of flue gas has steam
Reclaim and scrap steel preheating two kinds, or two are taken into account.What electric arc furnace steam heat recovery obtained is the most rudimentary energy (electric arc
Stove produce discontinuous, flue-gas temperature is unstable, the steam quality of waste heat recovery is the highest, transfers the relatively costly of generating and efficiency to
Relatively low), specifically, if waste heat recovery obtains the steam being equivalent to 100kwh/t heat energy, it is converted to the electric energy of recovery about
20kwh/t (to change in terms of aggregate efficiency 20%), it is considered to the investment of generating equipment and operation expense, electric arc furnace waste heat recovery mesh
Before be not the energy recovery mode of a preferable high-quality；And flue gas steel scrap can directly save electric energy input, and
Due to the thermal efficiency of arc furnace system self, it is positive benefit when the heat energy conversion of scrap steel preheating input is for electric energy, specifically, as
Really scrap steel preheating has brought the heat of 40kwh/t into electric arc furnace, then can convert reduce arc furnace electrode input electric energy 52～
55kwh/t.But scrap steel preheating has the environment protection treating of two English, the energy that part scrap steel preheating is saved can be consumed again.
Owing to, in electric arc furnace smelting cycle different periods, exhaust gas volumn and flue-gas temperature are different, two is low middle high
Or middle ware is inserted with low-temperature space, range of temperature is 400～1860 DEG C (measured value, partial molten irons at four holes), if flue gas
Temperature penetrates steel scrap layer, when flue-gas temperature maintains more than 800 DEG C, as, it is possible to control flue-gas temperature more than 900 DEG C, in flue gas
Two English will decompose, and enters back into quenching apparatus, and the synthesis again of two English in flue gas will be suppressed.And intermediate period
The obvious heat of smoke of (1400～1800)-900=> 500 DEG C, still can be obtained the recovery of high-quality by scrap steel preheating, this
Just take into account energy-conservation and environmental protection contradiction.But owing to flue-gas temperature, exhaust gas volumn are changes, steel scrap yardstick, steel scrap temperature, steel scrap
Air permeability, and equipment belt walks heat so that obtain and be directly over the flue-gas temperature of steel scrap layer in electric arc furnace sealed feeding device
It is difficult to stability contorting.
To this end, this utility model shunts part electric arc furnace smoke pre-heating steel scrap in steel scrap feeding device, separately set high temperature cigarette
Gas passage；Again with the low-temperature flue gas two after scrap steel preheating, high-temperature flue gas is flowed flue gas to merge, and control to merge the temperature of mixed flue gas
Degree is higher than 900 DEG C, and the feasibility of the real present level of this technical scheme equipment, it is the most convenient that detection controls.Owing to eliminating biography
System scrap steel preheating type electric arc furnace flue gas cooled down by steel scrap and the energy loss of a large amount of this intermediate link of afterburning and equipment operation with
Investment, this thinking is two English processing schemes of relatively economical during a kind of electric arc furnace sealed feeding.
This utility model can make airtight being added rapidly in electric arc furnace, utilizes airtight charge chute and the gear of wide-angle tilt
Material hermatic door lattice gear controls steel scrap blanking and cuts off inner flue gas of the stove and stove outer air, it is achieved the sealed feeding to electric arc furnace；Pass through
Control discharging point and improve the smelting cold-zone that solid accumulation during sealed feeding causes in side so that arc melting electric arc adds
Heat is more uniform, and makes the flue gas seal of the electric arc furnace during furnace operation be improved very well；Reduce charging process
To the impact of device the reliability that improves the impact of part of appliance anti-steel scrap, increase the life-span of equipment.The more important thing is, using
After the program, while electric arc furnace smelting acquisition itself is the most energy-conservation, it is not necessary to (or reducing in a large number) carries out high consumption to discharged gas fume
The afterburning of energy.The program is applicable not only to the transformation of old arc furnace equipment, is also applied for newly going up arc furnace equipment, is close at electric arc furnace
Close the technology being worthy to be popularized in feeding technique.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of technology that can realize the airtight centre charging of electric arc furnace,
Reduce power consumption to shorten the heat, and avoid or suppress saving energy of electric arc furnace technology (steel scrap charging and preheating) to bring at two English
Reason energy consumption problem, and improve the seal during electric arc furnace production operation.
For reaching above-mentioned purpose, the purpose of this utility model is achieved through the following technical solutions:
A kind of electric arc furnace sealed feeding device, including its export airtight charge chute of connecting airtight with electric arc furnace sidewall and
The backgauge hermatic door being arranged in airtight charge chute, airtight charge chute is divided into cold steel scrap and stores by described backgauge hermatic door
Room and charging dirt pocket, and under the effect of drive mechanism, cold steel scrap storage room is cut off with charging dirt pocket or connected, described
Airtight charge chute and horizontal plane inclination angle are 30～60 °.
Further, described backgauge hermatic door is the swinging arc formula backgauge hermatic door of swing arm constraint, including door-plate and swing arm, described
One end of swing arm is fixed with door-plate, and the other end is rotatable fixing by rotating shaft and airtight charge chute.
Further, respectively arranging a swing arm connected with intermediate beam at the two ends of door-plate, making swing arm is portal structure, institute
State door-plate to fix with intermediate beam.
Further, described swing arm is portal, and door-plate upper end is fixed on intermediate beam.
Further, described backgauge hermatic door is the insertion plate door of guide wheel guide rail constraint.
Further, described door-plate, insertion plate door are the straight plate of plane or curved surface arc.
Further, described door-plate, the periphery of insertion plate door are provided with smoke impervious edgewise.
Further, described charging dirt pocket and the junction of electric arc furnace sidewall are provided with one section of flexible skewed slot and flexible skewed slot drives
Dynamic device.
Further, described flexible skewed slot is the oblique section with electric arc furnace wall one and is fixed in flexible skewed slot driving means
Telescopic section.
Further, described flexible skewed slot driving means is guiding trolley or oil cylinder or cylinder or electric pushrod.
Further, it is provided with the vibrator for forced vibration feeding in described cold steel scrap storage room.
Further, also including locomotive, described locomotive is provided with fixed mount, described airtight charge chute is fixed on
Determine on frame.
Further, described steel scrap storage room, charging dirt pocket have at the bottom of the arcuate groove of indent.
Further, described door-plate, the bottom end face of insertion plate door have with arcuate groove at the bottom of conformal arc.
Further, described door-plate, the lower arcuate surface of insertion plate door are arranged at intervals with multiple sawtooth.
Further, the entrance of described steel scrap storage room is provided with mobile hermatic door.
Further, described charging dirt pocket is provided with the dust removing tube being in communication with the outside.
Further, described steel scrap storage room is provided with the shunting dust removing tube being in communication with the outside.
The beneficial effects of the utility model are:
1, realizing covered charging, prevent the heat leakage uncapped, energy saving effect is assessed 15～30kwh/t, production operation
Pattern can identical with conventional arc stove (stay steel 10～15%), it would however also be possible to employ stay greatly the continuous production operation of steel (stay steel 40～
, or part hot metal charging production operation 70%).
2, produce due to total enclosing, decrease thermometal and the contacting of N in air, it is possible to reduce the content of N in molten steel, enter
And improve the quality of steel.
3, cold feed, it is not necessary to the environmental protection fume processing devices such as additional flue gas afterburning and chilling, has if electric arc furnace produces
Enough economic worths, can select flue gas is used steam heat recovery technology, not have harmful produce that scrap steel preheating is additional
Raw (consistent with conventional arc stove).Bell, charging dirt pocket top and follow-up flue all can be as afterheat steam recovery points.
4, select shunting scrap steel preheating, the temperature of mixed flue gas after preheating is accurately controlled, it is not necessary to flue gas afterburning (or
A small amount of flue gas afterburning) just can reach chilling flue gas to suppress the flue-gas temperature of two English resynthesis, this process energy conservation effective matrix
40～60kwh/t, and two English improvement operating cost is low.
5, high inclination-angle skewed slot rapid loading, blanking operation only has the several seconds, even if considering promote pole time and open arc
Door, also shortens the non-cutting time of uncap charging, lifting etc., and every stove shortens smelting cycle 3～5min.
6, the cold steel scrap storage room that airtight inclination hopper and swinging arc formula backgauge hermatic door are constituted, strong shock resistance, to thing
The adaptability of material yardstick etc. is closer to tradition basket charging, is existing to stronger in electric arc furnace sealed feeding method.
7, skewed slot sidewall charging, is added to material, near stove center, improve or eliminate in the stove that sidewall feeds
Cold-zone problem, raising electric arc heated efficiency is the most energy-conservation.
8, charging dirt pocket arranges flexible skewed slot with body of heater junction, is one of emphasis of the present utility model:
This groove slightly exits lower furnace body, so that body of heater has bigger swinging operation space (such as to go out relative to feeding device
During steel, body of heater fascinates 15 °), on the one hand this eliminate the action of whole feeding device translation, is beneficial to improve operating efficiency；The opposing party
Still it is connected with body of heater above face charging dirt pocket, well prevents flue gas to leak；
Meanwhile, the discharging point of flexible skewed slot scalable charging, if sidewall windrow occurring in charging region if desired, permissible
Expecting of discharging opening top is promoted to move closer to the position at stove center by the repeatedly expanding-contracting action of flexible skewed slot.
Generally speaking, this utility model makes electric arc furnace produce more energy-saving and environmental protection；And equipment is simple, it is simple to safeguard,
Have the advantage of huge investment and construction, be applicable not only to old eaf renovation, be also applied for newly-built electric arc furnace project, adapt to
Property is extensive.
Accompanying drawing explanation
Fig. 1 is the structural representation of this utility model a kind of electric arc furnace sealed feeding device first embodiment；
Fig. 2 is the schematic diagram that flexible skewed slot exits electric arc furnace；
Fig. 3 is the schematic diagram that this utility model is fully disconnected with electric arc furnace；
Fig. 4 be backgauge hermatic door be swinging arc formula backgauge hermatic door schematic diagram；
Fig. 5 is that backgauge hermatic door is for improving swinging arc formula backgauge hermatic door schematic diagram；
Fig. 6 be backgauge hermatic door be plate backgauge hermatic door schematic diagram；
Fig. 7 is the structural representation of this utility model a kind of electric arc furnace sealed feeding device the second embodiment；
Fig. 8 is the structural representation of this utility model a kind of electric arc furnace sealed feeding device the 3rd embodiment；
Fig. 9 be the flue gas temperature control method first embodiment of this utility model a kind of electric arc furnace sealed feeding device be
System figure；
Figure 10 is flue gas temperature control method second embodiment of this utility model a kind of electric arc furnace sealed feeding device
System diagram.
In figure, 1 be electric arc furnace, 2 charging dirt pockets, 3 for swinging arc formula backgauge hermatic door, 31 for door-plate, 32 for swing arm, 33 turns
Axle, 34 be drive mechanism, 35 be smoke impervious edgewise, 36 be guide wheel, 4 be dust removing tube, 5 be airtight charge chute, 6 for mobile close
Seal up a door, 7 be flexible skewed slot, 7a be oblique section, 7b be telescopic section, 8 be guiding trolley, 9 be locomotive, 10 be outside feeding device,
11 for shunting dust removing tube, 12 for shunting smoke regulating valve, 13 be temperature element, 14 for flue gas residence container, 15 be flue gas chilling
Device, 16 be heat smoke adjusting means, 17 be fixed mount, 18 be steel scrap storage room, 19 for vibrator, 20 be sawtooth, 21 be burning
Mouth.
Detailed description of the invention
Below in conjunction with accompanying drawing, preferred embodiment of the present utility model is described in detail.
Utility model one: a kind of electric arc furnace sealed feeding device
Embodiment 1
As it is shown in figure 1, a kind of electric arc furnace sealed feeding device of the present embodiment, including consolidating on locomotive 9, locomotive 9
Determine frame 17 and the airtight charge chute 5 being fixed on fixed mount 17, the outlet of airtight charge chute 5 and the airtight company of electric arc furnace sidewall
Logical, in airtight charge chute 5, it is provided with backgauge hermatic door 3, backgauge hermatic door 3 have employed swinging arc formula backgauge seal door structure, its
Airtight charge chute is divided into cold steel scrap storage room 18 and charging dirt pocket 2, and by cold steel scrap under the effect of drive mechanism
Storage room 18 is cut off with charging dirt pocket 2 or connects, and the present embodiment arranges mobile hermatic door 6 at the entrance of steel scrap storage room, uses
In cutting off or open outside feeding device 10, meanwhile, for flue gas ash removal, in charging dirt pocket 2, it is provided with dust removing tube 4；This
Mode, electric furnace use can total enclosing charging produce.
When electric arc furnace produces, mobile hermatic door 6 is opened, and cold steel scrap storage room 18 is added by outside feeding device 10
Material, the backgauge hermatic door 3 lattice gear of closedown controls steel scrap blanking, and cuts off electric arc furnace flue gas and heat radiation is excessive, cuts off outside empty
Gas is inhaled into dust removing tube 4, and the raw material in steel scrap storage room 18 and heat smoke are also intercepted by arc formula backgauge hermatic door 3, to charging dress
When putting charging, electric arc furnace is in air-tight state and does not affect the production of electric arc furnace self, and dust removing tube 4 is by high-temperature flue gas in electric arc furnace
Siphon away.Control the flexible skewed slot 7 position in electric furnace, can be with the position of moderate control discharging point；
As in figure 2 it is shown, when flexible skewed slot 7 slightly exits electric furnace lateral wall, and electric furnace can need to do little angle according to production operation
Degree fascinates, and electric furnace is in preferable air-tight state.
As it is shown on figure 3, when electric arc furnace needs the charging charging of material (some is extra heavy) of uncapping；Electric arc furnace or feeding device need
When safeguarding, use locomotive can move integrally feeding device and disengage with electric arc furnace, convenient various operations and plant maintenance.
As the present embodiment, as shown in Figure 4, backgauge hermatic door 3 is swinging arc formula backgauge hermatic door, including door-plate 31 and swing arm
32, one end of swing arm 32 is fixed with door-plate 31, and the other end is rotatable fixing by rotating shaft 33 and airtight charge chute, drive mechanism
34 near middles being arranged on swing arm 32, under the effect of drive mechanism 34, swing arm 32 rotates around the axis, drive door-plate 31 make from
Open or near the repeating motion of bottom of cold steel scrap storage room, and then make to cut off or connect charging dirt pocket, stop or transport and give up
Steel material；Concrete, swing arm 32 arranges two, is separately fixed at the length two ends of door-plate 31, increases the bearing capacity of door-plate.
As the improvement of the present embodiment, as it is shown in figure 5, swing arm intermediate beam connects, making swing arm is portal structure, this
Time, the upper end of door-plate is fixed with intermediate beam, in order to the demolition and maintenance that door-plate is overall.
The periphery of door-plate is provided with smoke impervious edgewise 35, side or at most, the present embodiment side the most up is arranged, and makes
Obtain smoke impervious to external world more preferable；Meanwhile, the bottom end face interval of door-plate arranges and multiple stretches out bottom cold steel scrap storage room
Sawtooth 20 so that it is there is the stopping function of improvement, and have stronger permeability.And along with the prolongation of tooth-shape structure, door-plate
Shrink, tooth harrow can be evolved into, but long tooth harrow structure is easily wound around bonding steel scrap and structural strength is weak, affects device to electric arc
The feeding operation of stove.
Deriving as the present embodiment, as shown in Figure 6, backgauge hermatic door 3 is a kind of insertion plate door, and door-plate 31 is that plane is straight
Plate, is provided with multiple guide wheel 36, uses guide wheel guide rail structure common in machinery, and guide wheel guide rail is avoided high temperature, now put
Arc formula backgauge hermatic door is evolved into a backgauge plate.Certainly, the when of necessary, smoke impervious edgewise 35 can also be set, to increase
Add its sealing property, or lower along increasing short tooth, strengthen breathability and backgauge.
As the improvement of the present embodiment, as Fig. 1 feed dirt pocket and the junction of electric arc furnace sidewall be provided with one section flexible tiltedly
Groove 7 and flexible skewed slot driving means, flexible skewed slot driving means can be guiding trolley or oil cylinder or cylinder or electric pushrod,
Embodiment is guiding trolley 8, and guiding trolley 8 is also disposed on locomotive, concrete, and flexible skewed slot 7 has a following functions:
1) electric arc furnace technological operation and smoke impervious are met: sidewall feeds to ensure that charging falls into electric arc furnace, lower furnace body
Must overlap with feeding device, but contradiction when this structure and technological operation.Require in technique that arc melting process has vertical
Straight in the operation of fascinating in blanking direction, now, the sealing surface of this overlap joint vertical surface composition relative motion, and the horizontal plane overlapped
Operative interventions face of fascinating can be become, in this utility model solution be charging the front lower end of dirt pocket 2 flexible skewed slot 7 exit with
The connection of electric arc furnace 1 lower furnace body, the operative interventions face of fascinating of this overlap joint is just released sufficient space, the sky that faying surface swings
Between discharged by flexible skewed slot 7, electric arc furnace 1 just can fascinate and operate.Now major part district above charging dirt pocket 2
Territory is still connected with electric arc furnace, and electric arc furnace flue gas is siphoned away by dust removing tube 4, and electric arc furnace 1 remains at good flue gas air-tight state
(owing to heat smoke up wafts, flue gas will not give out electric arc furnace)；
2) blanking adjusts: the flexible skewed slot 7 diverse location in stove, can adjust raw material discharging point in stove；
3) pushing steel material: if there is windrow in charging side, flexible skewed slot moves back and forth for more than 7 time can be by heap buildup top
Push near center of arc furnace, such as the mark XX in figure.
Visible, flexible skewed slot 7 is to meet electric arc furnace technological operation, can realize again smoke impervious, blanking adjustment, push
The important component of three functions of steel material.
As the improvement of the present embodiment, as in figure 2 it is shown, be provided with swashing for forced vibration feeding in cold steel scrap storage room
Shake device 19, is got stuck by vibrator 19 or possesses initially luring or steel scrap steel scrap during stagnant material inclination angle design is less
Forced vibration carries, and improves the reliability of equipment charging, and usually, the probability that cold conditions steel scrap gets stuck can reduce；Higher temperatures steel scrap
Time probability increase, need the probability increase that vibrator work.
As the improvement of the present embodiment, steel scrap storage room, charging dirt pocket have (not shown) at the bottom of the arcuate groove of indent, with
Improve the ability of hopper anti-charging impact, for reducing the spacing at the bottom of arcuate groove and bottom door-plate, door-plate or the bottom end of insertion plate door
Be provided with on face with arcuate groove at the bottom of conformal arc, being allowed to a spacing can be the shortest, improves swinging arc formula backgauge hermatic door further
Blocking effect, as shown in Figure 4,5, 6.
As the improvement of the present embodiment, for accelerating charging rate, the inclination alpha of airtight charge chute with horizontal plane is set to
30～60 °, as it is shown in figure 1, experiment shows that, when inclination angle 30～35 °, the blanking operation of cold burden is typically at about 1～2 second, more greatly
Inclination angle then can be faster.
Embodiment 2
As it is shown in fig. 7, the flexible skewed slot 7 of the present embodiment is evolved into sealing and cuts somebody's hair as different from Example 1, EE is for exiting
Rear electric arc furnace can fascinate the stroke of operation, XX for pushing away steel stroke, the guide defunctionalization of flexible skewed slot, make maintenance simple, move
Make reliable.Outside feeding device 10 uses ramp automatic feeding device.
Embodiment 3
As shown in Figure 8, flexible skewed slot 7 is evolved into oblique section 7a with electric arc furnace wall one and is fixed on flexible skewed slot driving dress
Telescopic section 7b put.This mechanism makes the gap of transitional region eliminate, gap production process exist harm: during charging blanking and
Get stuck；Leak into air in operating process, overflow slag, if block steel scrap will the fascinating of jam electric arc furnace, even damage equipment, make
Its use is more safe and reliable, but flexible skewed slot 7 push away steel and regulation discharging point defunctionalization.
Meanwhile, the advantage of this structure also has: the stroke of the flexible groove 7 that inclines shortens, use more reliable, safeguard simpler.Outside
Feeding device 10 is also adopted by ramp automatic feeding device.
Utility model two: the flue gas temperature control method of a kind of electric arc furnace sealed feeding
Embodiment 1
Fig. 9 is the system diagram of the flue gas temperature control method of the present embodiment a kind of electric arc furnace sealed feeding, as it can be seen, electric
Electric arc furnace flue gas is divided into two-way by arc stove sealed feeding device, and a road high-temperature flue gas is derived by the dust removing tube near electric arc furnace,
Shunting dust removing tube after steel scrap in another road penetrating arc stove sealed feeding device is derived, and two-way flue gas mixes, and passes through dedusting
Shunting dust removing tube is led and the ratio flow control of main dust removing tube by the flue gas conditioning device on pipe and shunting dust removing tube, it is thus achieved that required
The mixed flue gas temperature wanted, suppresses two English to produce.
Be embodied as: the airtight charge chute 5 that sealing surface 6 is closed in the drawings equipped with being wound around mutually and have the steel scrap in space,
Steel scrap is put into gear in airtight charge chute 5 and (is first closed during charging, fed by the swinging arc formula backgauge hermatic door 3 that part is opened
After one-tenth, appropriateness is opened.Experiment shows, due to scrap steel block winding each other and crane span structure, selects suitable bottom land inclination angle, backgauge
As long as hermatic door 3 has partial insertion airtight charge chute 5 class enclosed construction just the steel scrap entirety being contained in groove can be blocked, when
Backgauge hermatic door can overall landing after extracting out) electric arc furnace flue gas is divided into two-way, and a road f1 is main dust removing tube above charging dirt pocket
Deriving, a road f2, through the unlatching space of swinging arc formula backgauge hermatic door 3, penetrates preheating scrap and leads via shunting dust removing tube 11
Go out；Two-way flue gas mixes again.Temperature element 13 detects mixed flue-gas temperature, if detection temperature is too high (such as 1100
DEG C), then adding the aperture of large shunt smoke regulating valve 12, the exhaust gas volumn increasing f2 reduces the exhaust gas volumn of f1；If detection temperature mistake
The end (such as 650 DEG C), then (smoke regulating valve 12 can be appointing on dust removal port and pipeline to the aperture of reduction shunting smoke regulating valve 12
Meaning flue gas adjusts connection device, adjustable connects aperture the door closed as dust removal port made, it is possible to as smoke regulating valve 12), reduce
The exhaust gas volumn of f2 increases the exhaust gas volumn of f1；In some operational phase, when as less in exhaust gas volumn, flue-gas temperature is relatively low, can close
Shunting smoke regulating valve 12；Additionally heat smoke adjusting means 16 also can provide heat smoke auxiliary adjustment, so by removing shunting
Dirt pipe is led and the ratio flow control of main dust removing tube, it is thus achieved that required mixed flue gas temperature.When flue-gas temperature more than 800 DEG C,
Two English in flue gas will decompose, it is considered to it is more higher, as taken that heat leakage and margin of safety control temperature value obtain value
Controlling flue-gas temperature 900 DEG C, meanwhile, the present embodiment also sets up burner 21 at charging dirt pocket, can carry steel scrap and flue gas
Heat for auxiliary, in order to accurately control the temperature needed.
Mixed flue gas temperature controls at about 900 DEG C (higher than two English Pintsch process) and continues to have for more than 3 seconds enough to divide
The time solved, therefore before entering quenching apparatus, it is necessary to have a flue gas residence container 14, flue gas residence container 14 can be pipe
Road, combustion settling chamber, regenerative apparatus etc., but flue gas residence container 14 at least needs good sealing and low heat emission.
Flue gas enters rapid cooling device for fume 15 subsequently, and rapid cooling device for fume 15 can use mixed wind, spray or heat exchanger, but
Rate of cooling requires at 300 DEG C/more than S, to realize the suppression again synthesized two English of flue gas cooling procedure.
The present embodiment is provided with flue gas conditioning device 16 on heat smoke passage, and by the control of PLC control system, makes this
Device realizes preheating and two functions of charging, becomes scrap preheater or sealed feeding device.
The present embodiment can arrange mixed air port on heat smoke passage, is mixed into CO, the NO etc. in air burning mixed flue gas,
The protoxide in flue gas can be reduced.
In the present embodiment, shunting smoke regulating valve, temperature element and swinging arc formula backgauge are sealed by PLC control system the most respectively
The drive mechanism of door connects control, and then realizes the charging of whole system and preheat automatization and intellectuality.
Embodiment 2
Figure 10 is the system diagram of the flue gas temperature control method of a kind of electric arc furnace sealed feeding of the present embodiment, real with first
Execute in the high-temperature flue gas derived from isocon being introduced directly into steel scrap storage room unlike example and mix with low-temperature flue gas, and at gear
Under the comprehensive function of material hermatic door 3 and heat smoke adjusting means 16, regulate flue gas flow, and then realize the control to flue-gas temperature
System.
Though the present embodiment not as embodiment 1 flexibly, but decreases shunting valve, and shortens exterior line, make equipment
Cost is lower.
This utility model successfully realizes the temperature utilizing the heat absorption of electric arc furnace flue gas scrap steel preheating that entirety is discharged electric arc furnace flue gas
The synthesis again of two English in the control of degree, and suppression flue gas；Within the electric arc furnace smelting cycle, it is not suitable for scrap steel preheating simultaneously
Time period, scrap steel preheating process can be cut off easily, thus reduce the generation of two English, it is achieved the energy-conservation unification with environmental protection,
Particularly, also utilize fume afterheat that cold steel scrap is preheated, it is achieved circulation in UTILIZATION OF VESIDUAL HEAT IN, make this device have charging and
Preheating dual-use function.
Finally illustrating, preferred embodiment above is only in order to illustrate the technical solution of the utility model and unrestricted, to the greatest extent
This utility model is described in detail by pipe by above preferred embodiment, but those skilled in the art should manage
Solve, in the form and details it can be made various change, without departing from this utility model claims institute
The scope limited.
Claims (17)
1. an electric arc furnace sealed feeding device, it is characterised in that: include its outlet airtight with electric arc furnace sidewall connect airtight
Charge chute and the backgauge hermatic door being arranged in airtight charge chute, airtight charge chute is divided into by described backgauge hermatic door
Cold steel scrap storage room and charging dirt pocket, and under the effect of drive mechanism by cold steel scrap storage room and charging dirt pocket cut off or
Connection, described airtight charge chute and horizontal plane inclination angle are 30～60 °.
A kind of electric arc furnace sealed feeding device the most according to claim 1, it is characterised in that: described backgauge hermatic door is pendulum
The swinging arc formula backgauge hermatic door of arm constraint, including door-plate and swing arm, one end of described swing arm is fixed with door-plate, and the other end is by turning
Axle is rotatable with airtight charge chute fixing.
A kind of electric arc furnace sealed feeding device the most according to claim 2, it is characterised in that: respectively arrange at the two ends of door-plate
One swing arm connected with intermediate beam, making swing arm is portal structure, and described door-plate is fixed with intermediate beam.
A kind of electric arc furnace sealed feeding device the most according to claim 1, it is characterised in that: described backgauge hermatic door is for leading
The insertion plate door of wheel guide rail constraint.
5. according to a kind of electric arc furnace sealed feeding device described in Claims 2 or 3 or 4, it is characterised in that: described door-plate, insert
Plate door is the straight plate of plane or curved surface arc.
6. according to a kind of electric arc furnace sealed feeding device described in Claims 2 or 3 or 4, it is characterised in that: described door-plate, insert
The periphery of plate door is provided with smoke impervious edgewise.
A kind of electric arc furnace sealed feeding device the most according to claim 1, it is characterised in that: described charging dirt pocket and electricity
The junction of arc furnace sidewall is provided with one section of flexible skewed slot and flexible skewed slot driving means.
A kind of electric arc furnace sealed feeding device the most according to claim 6, it is characterised in that: described flexible skewed slot is and electricity
The oblique section of arc furnace wall one and the telescopic section being fixed in flexible skewed slot driving means.
A kind of electric arc furnace sealed feeding device the most according to claim 6, it is characterised in that: described flexible skewed slot drives dress
It is set to guiding trolley or oil cylinder or cylinder or electric pushrod.
A kind of electric arc furnace sealed feeding device the most according to claim 1, it is characterised in that: described cold steel scrap storage room
Inside it is provided with the vibrator for forced vibration feeding.
11. a kind of electric arc furnace sealed feeding devices according to claim 1, it is characterised in that: also include locomotive, described
Being provided with fixed mount on locomotive, described airtight charge chute is fixed on fixed mount.
12. according to a kind of electric arc furnace sealed feeding device described in Claims 2 or 3 or 4, it is characterised in that: described steel scrap stores up
Deposit room, charging dirt pocket has at the bottom of the arcuate groove of indent.
13. a kind of electric arc furnace sealed feeding devices according to claim 12, it is characterised in that: described door-plate, insertion plate door
Bottom end face have with arcuate groove at the bottom of conformal arc.
14. a kind of electric arc furnace sealed feeding devices according to claim 13, it is characterised in that: described door-plate, insertion plate door
Lower arcuate surface be arranged at intervals with multiple sawtooth.
15. a kind of electric arc furnace sealed feeding devices according to claim 1, it is characterised in that: described steel scrap storage room
Entrance is provided with mobile hermatic door.
16. a kind of electric arc furnace sealed feeding devices according to claim 1, it is characterised in that: described charging dirt pocket sets
It is equipped with the dust removing tube being in communication with the outside.
17. a kind of electric arc furnace sealed feeding devices according to claim 1, it is characterised in that: described steel scrap storage room sets
It is equipped with the shunting dust removing tube being in communication with the outside.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620504722.5U CN205690871U (en) | 2016-05-30 | 2016-05-30 | A kind of electric arc furnace sealed feeding device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620504722.5U CN205690871U (en) | 2016-05-30 | 2016-05-30 | A kind of electric arc furnace sealed feeding device |
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| CN205690871U true CN205690871U (en) | 2016-11-16 |
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| CN201620504722.5U Expired - Fee Related CN205690871U (en) | 2016-05-30 | 2016-05-30 | A kind of electric arc furnace sealed feeding device |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105865193A (en) * | 2016-05-30 | 2016-08-17 | 中冶赛迪工程技术股份有限公司 | Sealed charging device and flue gas temperature control method of electric-arc furnace |
| CN106705685A (en) * | 2016-12-06 | 2017-05-24 | 中冶赛迪工程技术股份有限公司 | Electric furnace exhaust gas adjusting device and method |
| CN107328242A (en) * | 2017-08-11 | 2017-11-07 | 中冶焦耐(大连)工程技术有限公司 | It is a kind of can adjust automatically blanking angle device for discharging |
| WO2017206595A1 (en) * | 2016-05-30 | 2017-12-07 | 中冶赛迪工程技术股份有限公司 | Feeder device utilized in electric arc furnace, and flue gas and temperature control method |
| CN111551020A (en) * | 2020-05-13 | 2020-08-18 | 中冶京诚工程技术有限公司 | Dust removal system for charging section and horizontal continuous charging electric furnace |
| CN113899199A (en) * | 2021-10-08 | 2022-01-07 | 中冶赛迪工程技术股份有限公司 | Cleaning device for slag door of electric arc furnace |
| JP7115662B1 (en) * | 2021-02-10 | 2022-08-09 | Ｊｆｅスチール株式会社 | Molten iron manufacturing method using electric furnace equipped with image device |
| WO2022172769A1 (en) * | 2021-02-10 | 2022-08-18 | Ｊｆｅスチール株式会社 | Method for producing molten iron using electric furnace provided with video device |
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| CN105865193A (en) * | 2016-05-30 | 2016-08-17 | 中冶赛迪工程技术股份有限公司 | Sealed charging device and flue gas temperature control method of electric-arc furnace |
| WO2017206595A1 (en) * | 2016-05-30 | 2017-12-07 | 中冶赛迪工程技术股份有限公司 | Feeder device utilized in electric arc furnace, and flue gas and temperature control method |
| CN105865193B (en) * | 2016-05-30 | 2018-06-05 | 中冶赛迪工程技术股份有限公司 | A kind of electric arc furnaces sealed feeding device and flue gas temperature control method |
| CN106705685A (en) * | 2016-12-06 | 2017-05-24 | 中冶赛迪工程技术股份有限公司 | Electric furnace exhaust gas adjusting device and method |
| CN107328242A (en) * | 2017-08-11 | 2017-11-07 | 中冶焦耐(大连)工程技术有限公司 | It is a kind of can adjust automatically blanking angle device for discharging |
| CN111551020A (en) * | 2020-05-13 | 2020-08-18 | 中冶京诚工程技术有限公司 | Dust removal system for charging section and horizontal continuous charging electric furnace |
| JP7115662B1 (en) * | 2021-02-10 | 2022-08-09 | Ｊｆｅスチール株式会社 | Molten iron manufacturing method using electric furnace equipped with image device |
| WO2022172769A1 (en) * | 2021-02-10 | 2022-08-18 | Ｊｆｅスチール株式会社 | Method for producing molten iron using electric furnace provided with video device |
| TWI796131B (en) * | 2021-02-10 | 2023-03-11 | 日商杰富意鋼鐵股份有限公司 | Manufacturing method of molten iron using an electric furnace equipped with a video device |
| RU2815875C2 (en) * | 2021-02-10 | 2024-03-22 | ДжФЕ СТИЛ КОРПОРЕЙШН | Method of producing molten cast iron using electric furnace equipped with video device |
| CN113899199A (en) * | 2021-10-08 | 2022-01-07 | 中冶赛迪工程技术股份有限公司 | Cleaning device for slag door of electric arc furnace |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161116 Termination date: 20190530 |