CN205066413U - Steel scrap preheats type electric arc furnace - Google Patents
Steel scrap preheats type electric arc furnace Download PDFInfo
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- CN205066413U CN205066413U CN201520858687.2U CN201520858687U CN205066413U CN 205066413 U CN205066413 U CN 205066413U CN 201520858687 U CN201520858687 U CN 201520858687U CN 205066413 U CN205066413 U CN 205066413U
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- electric arc
- scrap steel
- steel preheating
- steel scrap
- arc furnaces
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Abstract
The utility model discloses a steel scrap preheats type electric arc furnace, steel scrap preheating chamber including electric arc furnace body and slope setting, contained angle between steel scrap preheating chamber and horizontal plane is 30-65, the steel scrap preheating chamber is connected with the electric arc furnace body, and the upper end is equipped with to remove dust manages the room, it keeps off the material tine harrow to be equipped with one on the steel scrap preheating chamber, it is equipped with actuating mechanism to keep off material tine harrow below, the flue gas gets into the steel scrap preheating chamber and pierces through and keep off material tine harrow and steel scrap and removed dust a tub room and take away, and the steel scrap is preheated, then keeps off the material tine harrow and open, and the steel scrap after preheating is central to the electric arc furnace body along the steel scrap preheating chamber tank bottom cunning of slope, through big inclination steel scrap preheating chamber with keep off material tine harrow complex method and change the whereabouts angle of steel scrap, improved incline the partially problem of windrow of the reinforced electric arc furnace of lateral wall, reduced the impact force of steel scrap to equipment, very big improvement the reliability of equipment.
Description
Technical field
The utility model belongs to metallurgical technology field, is specifically related to a kind of scrap steel preheating type electric arc furnaces.
Background technology
Energy-conservation in electric furnace steel making, consumption reduction, environmental protection are one of core technologies of global Electric Furnace Steelmaking development always.Wherein, electric furnace flue gas preheating scrap technology is utilized to be one two technology all studied during the last ten years both at home and abroad, but because its technical difficulty is large, current only have a small amount of scheme to drop into actual use, and Typical Representative is as finger shaft (DE4025249A1-1992), vertical shaft thruster reinforced (US2007/0013112A1) and CONSTEEL (US5400358-1992) technology vibrating continuous charging.
Vertical shaft preheating of feeding in raw material can penetrate steel scrap layer because of flue gas, and pre-heating energy-saving effect is better, can reach a ton steel 60 ~ 100kw.h, but equipment is easily smashed by steel scrap; In addition, because vertical shaft is added on bell, the load that bell rotary system is born increases greatly, and the large impact of maintenance is produced.
CONSTEEL is a kind of horizontal continuity feeding technology, and can realize electric furnace stabilising arc and smelt, environmental protection and consumption of electrode is lower, greatly reduces the production process expense of electric furnace; But there is following a few point defect in the method: first, only has upper materials to be heated, scrap steel preheating poor effect, only have a ton steel 25kw.h; Secondly, for improving and raw material (steel scrap) heat exchange efficiency, it is thinner that the steel scrap in delivery chute piles height on the conveyor belt, increases preheating section length, and equipment total length can reach 90 ~ 100m, is unfavorable for that workshop is arranged; 3rd, the method dynamic seal (packing) gas leakage is comparatively serious, larger to the capacity requirement of blower fan etc.
Except the various shortcomings on above-mentioned technology and machinery equipment, also there is a fatal drawback in existing electric arc furnace smelting technology, namely steel scrap always adds from electric arc furnaces sidewall or large eccentricity, cold burden side in electric arc furnaces burner hearth is caused to pile up, and electric arc furnaces arc radiation can be surrounding equalization, make such technology there is the smelting cold-zone being difficult to overcome in technique, affect whole production process, further limit scrap steel preheating Technique Popularizing.
Summary of the invention
In view of this, the purpose of this utility model be to provide a kind of facility compact, the pre-thermal efficiency high, reinforced impact little, effectively can improve electric arc furnaces sidewall and feed in raw material and smelt the scrap steel preheating type electric arc furnaces of cold-zone problem.
For achieving the above object, the utility model provides following technical scheme: a kind of scrap steel preheating type electric arc furnaces, the scrap steel preheating room comprising electric arc furnaces body and be obliquely installed, angle between described scrap steel preheating room and horizontal plane is 30 ° ~ 65 °, described scrap steel preheating room by be arranged on its exit, lower end body of heater dihedral sealing and electric arc furnaces body on seal closure be connected with electric arc furnaces body, upper end is provided with dust removing tube room, the interface side of described scrap steel preheating room and electric arc furnaces body is provided with one for barrier steel scrap or the backgauge tooth harrow controlling blanking, the corresponding driving mechanism be provided with for driving backgauge tooth harrow on described backgauge tooth harrow.
Further, also comprise dolly, described scrap steel preheating room tilts to be fixed on dolly, and described backgauge tooth harrow to be arranged on dolly or scrap steel preheating room and to be interspersed between scrap steel preheating room, and described driving mechanism one end is arranged on dolly.
Further, positioner is provided with bottom described dolly.
Further, described backgauge tooth harrow is primarily of crossbeam, rake teeth and handle composition, and described rake teeth has several, is disposed on crossbeam, and described handle has two, and correspondence is arranged on crossbeam two ends.
Further, described crossbeam is provided with one for drawing the hauling rope that backgauge tooth harrow swings.
Further, charge door place, upper end, described scrap steel preheating room is also provided with turnover panel hermatic door.
Further, also comprise the cold burden vibration feed tank being arranged on charge door place, upper end, scrap steel preheating room, described cold burden vibration feed tank is fixed on dolly by vibrating device.
Further, slipper seal door is provided with above described cold burden vibration feed tank.
Further, the oblique rail tipping bucket feeding system being arranged on charge door place, upper end, scrap steel preheating room is also comprised.
The beneficial effects of the utility model are:
1) compared with the sidewall charging system of routine, this charging system can make steel scrap be slipped near electrode centers, greatly can improve in electric arc furnaces sidewall charging technology and smelt cold-zone problem.
2) its heat exchange efficiency is suitable with shaft furnace, and energy-saving effect is better than CONSTEEL.
3) charging system is divided into cold-zone and Liang Ge region, hot-zone, disposable reinforced needed for the enormous impact power of bearing be placed on cold feed district (i.e. cold burden vibration feed tank), optimize the distribution of charging system mechanics; Cold burden vibration feed tank equipment intensity is high, be hit part no-cooling-water, production safety, is more convenient for safeguarding; Preheating chamber bottom land is inclined-plane, and scrap steel preheating room and backgauge tooth harrow take controllable vibration to feed in raw material, and make impulsive force suffered by backgauge tooth harrow reduce more than 80 ~ 90%; Reliability is high, leak and problem on deformation be greatly improved; Arcuate oscillating motion made by backgauge tooth harrow, reduce steel scrap and be wrapped in probability on backgauge tooth harrow, not only increase the maintainability (can preheating chamber be extracted out when leaking) of backgauge tooth harrow, improve the reliability of whole charging system and the tolerance (namely monolithic steel scrap yardstick and weight can increase) to steel scrap material simultaneously.
4) cold burden vibration feed tank can realize totally-enclosed reinforced, and the heat smoke of scrap steel preheating indoor can not emit outward.
5) scrap steel preheating room, backgauge tooth harrow, cold burden vibration feed tank, dust removing tube room etc. are integrated on a dolly that can retreat, just can be thrown off with electric arc furnaces body by programme-control, with technological actions such as relevant hermetically-sealed construction cooperation can complete scrap steel preheating, sealing is reinforced, electric arc furnaces low-angle fascinates, wide-angle tappings, be convenient to the maintenance of equipment.
Generally speaking, this technique eliminates electric arc furnaces sidewall windrow cold-zone phenomenon; Entire system is more energy-conservation, be convenient to safeguard, has huge investment and the advantage of construction.
Accompanying drawing explanation
In order to make the purpose of this utility model, technical scheme and beneficial effect clearly, the utility model provides following accompanying drawing to be described:
Fig. 1 is hermetically sealed scrap steel preheating furnace structure schematic diagram;
Fig. 2 is the structural representation (scheme one) of backgauge tooth harrow;
Fig. 3 is the structural representation (scheme two) of backgauge tooth harrow;
Fig. 4 is the structural representation (scheme three) of backgauge tooth harrow;
Fig. 5 is that cold burden vibration feed tank is fed in raw material to scrap steel preheating room process schematic;
To be scrap steel preheating room to feed in raw material process schematic to electric arc furnaces body Fig. 6;
Fig. 7 is scrap steel preheating room and electric arc furnaces body disengaged position schematic diagram;
Fig. 8 is semitight scrap steel preheating furnace structure schematic diagram.
Detailed description of the invention
Below in conjunction with accompanying drawing, preferred embodiment of the present utility model is described in detail.
As shown in the figure, scrap steel preheating type electric arc furnaces in the present embodiment, the scrap steel preheating room 4 comprising electric arc furnaces body 1 and be obliquely installed, angle between described scrap steel preheating room 4 and horizontal plane is 30 ° ~ 65 °, the seal closure 2 that described scrap steel preheating room 4 is sealed on 8 and electric arc furnaces body 1 by the body of heater dihedral being arranged on its exit, lower end is connected with electric arc furnaces body 1, upper end is provided with dust removing tube room 5, described scrap steel preheating room 4 is provided with one for barrier steel scrap 12 or the backgauge tooth harrow 3 controlling blanking with the interface side of electric arc furnaces body 1, the corresponding driving mechanism 9 be provided with for driving backgauge tooth harrow 3 on described backgauge tooth harrow 3.
Concrete, backgauge tooth harrow 3 penetrates shell wall above scrap steel preheating room 4, block the steel scrap in scrap steel preheating room 4 and control its blanking, there is between backgauge tooth harrow 3 gap and allow plume penetration, electric arc furnaces flue gas enters scrap steel preheating room 4 by backgauge tooth harrow 3, penetrate steel scrap 12 gap to be taken away by dust removing tube room 5, steel scrap 12 obtains preheating.After preheating certain hour, under driving mechanism 9 acts on, backgauge tooth harrow 3 is opened, and the steel scrap 12 after preheating slides to electric arc furnaces body 1 center along scrap steel preheating room 4 bottom land tilted.Driving mechanism in the present embodiment can adopt the device such as oil cylinder, hydraulic cylinder.
Because steel scrap discharging point depends on position height and the inclination angle of material, and the angle of inclination of scrap steel preheating room 4 is larger in the present embodiment, it is 30 ° ~ 65 °, when backgauge tooth harrow 3 is opened fast, steel scrap can be dished out along inclined-plane, and under horizontal component velocity and effect of inertia, steel scrap throws to electric arc furnaces body 1 center with parabola, significantly improve sidewall to feed in raw material the problem of electric arc furnaces inclined side windrow, improve cold-zone.On the other hand, because scrap steel preheating room 4 bottom land is inclined-plane, steel scrap 12 is slipped on backgauge tooth harrow 3 bottom scrap steel preheating room 4, because material is less and for landing, the impulsive force be subject to of backgauge tooth harrow 3 can reduce more than 80 ~ 90%, only have that overall time is feeded 10% ~ 20%, greatly improve the reliability of equipment.
Dolly 10 is also comprised in the present embodiment, described scrap steel preheating room 4 tilts to be fixed on dolly 10, described backgauge tooth harrow 3 to be arranged on dolly 10 and to be interspersed between scrap steel preheating room 4, (the rake teeth 3b of backgauge tooth harrow 3 penetrates shell wall above scrap steel preheating room 4), described driving mechanism 9 one end is arranged on dolly 10; Positioner 16 is provided with bottom dolly 10.The devices such as scrap steel preheating room 4, backgauge tooth harrow 3 are integrated on dolly 10, easily can realize scrap steel preheating room 4 and be separated with electric arc furnaces body 1, not only be beneficial to the technological actions such as electric arc furnaces body 1 low-angle fascinates, wide-angle tapping, be also beneficial to plant maintenance.In addition, owing to adopting integrated moveable formula structure, this device can realize electric arc furnaces and fascinate as wide-angle, completes the effects such as tapping deslagging operation, bell rotation, is also convenient to the emergency processing of preheating device cooling water leakage accident.
In the present embodiment, described backgauge tooth harrow 3 forms primarily of crossbeam 3c, rake teeth 3b and handle 3a, and described rake teeth 3b is arc-shaped gear, has several, is disposed on crossbeam 3c, and described handle 3a has two, and correspondence is arranged on crossbeam 3c two ends.Wherein, crossbeam 3c and handle 3a is positioned at outside scrap steel preheating room 4, rake teeth 3b is interspersed to be arranged between scrap steel preheating room 4, handle 3a one end is hinged on dolly 10 (or in external structure of scrap steel preheating room 4), driving mechanism 9 two ends are hinged on dolly 10 respectively with on handle 3a, backgauge tooth harrow 3 does arcuate oscillating motion under the effect of driving mechanism 9, realizes barrier steel scrap 12 and transfers blanking action.
Certainly, backgauge tooth harrow 3 also has other variant, as Fig. 3, Fig. 4 handle 3a retrains by guide wheel, that does under driving mechanism 9 drives does synchronous arcuate movement or rectilinear motion (depending on the shape of rake teeth 3b and handle 3a), realizes backgauge and controls.
Scrap steel preheating room 4 is also provided with tooth harrow sealing 15, prevents flue gas from emerging from tooth harrow gap by blowing, the elastic deformation of rake teeth 3b can also be held.
As the further improvement of such scheme, described crossbeam 3c is provided with one for drawing the hauling rope that backgauge tooth harrow 3 swings, and arcuate oscillating motion made by bootable backgauge tooth harrow.
In the present embodiment, charge door place, upper end, described scrap steel preheating room 4 is also provided with turnover panel hermatic door 6, can close scrap steel preheating room 4, ensure pre-heat effect further in scrap steel preheating process.
Also comprise the cold burden vibration feed tank 7 being arranged on charge door place, upper end, scrap steel preheating room 4 in the present embodiment, described cold burden vibration feed tank 7 is fixed on dolly 10 by vibrating device; Slipper seal door 11 is provided with above described cold burden vibration feed tank 7.Outside steel scrap 12 is fed through in cold burden vibration feed tank 7 by reinforced induction system 13, and under the effect of vibration of cold burden vibration feed tank 7, steel scrap 12 progressively adds on the backgauge tooth harrow 3 in scrap steel preheating room 4.Cold burden vibration feed tank 7 can resisting strong impact, thus improves the reliability of equipment.Cold burden vibration feed tank 7 is closed into an independently compartment with turnover panel hermatic door 6 by slipper seal door 11, achieves the totally-enclosed reinforced of system, ensure that heat smoke can not emit outward.
The present embodiment also has an alternative, the cold burden vibration feed tank 7 being about to be arranged on charge door place, upper end, scrap steel preheating room 4 replaces to oblique rail tipping bucket feeding system 17, because oblique rail material loading speed is fast, therefore the many batches of impulsive forces reducing steel scrap 12 pairs of backgauge tooth harrows 3 on a small quantity can be adopted.The method can not realize the hermetically sealed conveying preheating of material, can only reach semiclosed production, be suitable for old eaf renovation.
The utility model by large tilt the method that matches with backgauge tooth harrow 3 of (30 ° ~ 65 °) scrap steel preheating room 4 change steel scrap 12 and to fall angle, when backgauge tooth harrow 3 is opened fast, steel scrap can be dished out along inclined-plane, under horizontal component velocity and effect of inertia, steel scrap throws to electric arc furnaces body 1 center with parabola, improves sidewall and to feed in raw material the problem of electric arc furnaces inclined side windrow.
Below in conjunction with accompanying drawing, course of action of the present invention is described:
As Fig. 1, electric arc furnaces is smelted, turnover panel hermatic door 6 is closed, prevent air from entering dust removing tube room 5, slipper seal door 11 is opened, and feed in raw material induction system 13 of outside steel scrap is fed in raw material for cold burden vibration feed tank 7, steel scrap 12 in scrap steel preheating room 4 is blocked by backgauge tooth harrow 3, flue gas leads in scrap steel preheating room 4 through seal closure 2, penetrates backgauge tooth harrow 3 and steel scrap 12 is taken away by dust removing tube room 5, and steel scrap obtains preheating.
Now, scrap steel preheating room 4 is connected with electric arc furnaces body 1 by seal closure 2, body of heater dihedral sealing 8, scrap steel preheating room 4 and seal closure 2, electric arc furnaces body 1 bottom and body of heater dihedral seal a vertical sealing plane between 8, sealing plane is allowed to stay appropriate gap, with the low-angle technological operation making electric arc furnaces body do-4 ~+4.(note: be often made of one in scrap steel preheating room 4 and body of heater dihedral sealing 8 in practice, seal closure 2 is a part for arc furnace cover.
As Fig. 3, electric arc furnaces is smelted, and turnover panel hermatic door 6 is opened, and slipper seal door 11 is closed, and cold burden vibration feed tank 7 is carried out continuous shaking and closed reinforced to scrap steel preheating room 4.Steel scrap 12 is slipped on backgauge tooth harrow 3 bottom scrap steel preheating room 4, and this landing process reduces the impulsive force that backgauge tooth harrow 3 is subject to, and only have that overall time is feeded 10% ~ 20%.
As Fig. 4, backgauge tooth harrow 3 driven-mechanism 9 jack-up, steel scrap 12 slides to center, electric arc furnaces molten bath from scrap steel preheating room 4; Arc furnace electrode is done temporarily suitably to rise, in order to avoid pounded disconnected by the steel scrap 12 of landing simultaneously.The steel scrap that in figure, C0, C1, C2, C3, C4 represent various point locations respectively falls into the drop point emulated data result after electric arc furnaces body.Tilt in scrap steel preheating room 4 45 °, coefficient of friction is when being 0.4, after steel scrap 12 falls into electric arc furnaces, still have the proal velocity component of entirety about 3.5m/s in theory, make electric arc furnaces heat cold-zone and improve.
Be provided with Gas injection sealing 14 above cold burden vibration feed tank 7, in reinforced process, inflatable prevents from or reduces hot gas entering cold feed groove 7.
What finally illustrate is, above preferred embodiment is only in order to illustrate the technical solution of the utility model and unrestricted, although be described in detail the utility model by above preferred embodiment, but those skilled in the art are to be understood that, various change can be made to it in the form and details, and not depart from the utility model claims limited range.
Claims (9)
1. a scrap steel preheating type electric arc furnaces, it is characterized in that: the scrap steel preheating room comprising electric arc furnaces body and be obliquely installed, angle between described scrap steel preheating room and horizontal plane is 30 ° ~ 65 °, described scrap steel preheating room by be arranged on its exit, lower end body of heater dihedral sealing and electric arc furnaces body on seal closure be connected with electric arc furnaces body, upper end is provided with dust removing tube room, the interface side of described scrap steel preheating room and electric arc furnaces body is provided with for barrier steel scrap or the backgauge tooth harrow controlling blanking, on described backgauge tooth harrow, correspondence is provided with one for driving the driving mechanism of backgauge tooth harrow.
2. scrap steel preheating type electric arc furnaces according to claim 1, it is characterized in that: also comprise dolly, described scrap steel preheating room tilts to be fixed on dolly, and described backgauge tooth harrow to be arranged on dolly or scrap steel preheating room and to be interspersed between scrap steel preheating room, and described driving mechanism one end is arranged on dolly.
3. scrap steel preheating type electric arc furnaces according to claim 2, is characterized in that: be provided with positioner bottom described dolly.
4. scrap steel preheating type electric arc furnaces according to claim 2, is characterized in that: described backgauge tooth harrow is primarily of crossbeam, rake teeth and handle composition, and described rake teeth has several, is disposed on crossbeam, and described handle has two, and correspondence is arranged on crossbeam two ends.
5. scrap steel preheating type electric arc furnaces according to claim 4, is characterized in that: described crossbeam is provided with one for drawing the hauling rope that backgauge tooth harrow swings.
6. scrap steel preheating type electric arc furnaces according to claim 1, is characterized in that: charge door place, upper end, described scrap steel preheating room is also provided with turnover panel hermatic door.
7. scrap steel preheating type electric arc furnaces according to claim 6, it is characterized in that: also comprise the cold burden vibration feed tank being arranged on charge door place, upper end, scrap steel preheating room, described cold burden vibration feed tank is fixed on dolly by vibrating device.
8. scrap steel preheating type electric arc furnaces according to claim 7, is characterized in that: be provided with slipper seal door above described cold burden vibration feed tank.
9. scrap steel preheating type electric arc furnaces according to claim 6, is characterized in that: also comprise the oblique rail tipping bucket feeding system being arranged on charge door place, upper end, scrap steel preheating room.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520858687.2U CN205066413U (en) | 2015-10-30 | 2015-10-30 | Steel scrap preheats type electric arc furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520858687.2U CN205066413U (en) | 2015-10-30 | 2015-10-30 | Steel scrap preheats type electric arc furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205066413U true CN205066413U (en) | 2016-03-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520858687.2U Withdrawn - After Issue CN205066413U (en) | 2015-10-30 | 2015-10-30 | Steel scrap preheats type electric arc furnace |
Country Status (1)
| Country | Link |
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| CN (1) | CN205066413U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105202907A (en) * | 2015-10-30 | 2015-12-30 | 中冶赛迪工程技术股份有限公司 | Steel scrap preheating type electric arc furnace and method of improving heating cold area of side wall charging electric arc furnace |
| EP3467418A4 (en) * | 2016-05-30 | 2019-12-18 | CISDI Engineering Co., Ltd | Feeder device utilized in electric arc furnace, and flue gas and temperature control method |
-
2015
- 2015-10-30 CN CN201520858687.2U patent/CN205066413U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105202907A (en) * | 2015-10-30 | 2015-12-30 | 中冶赛迪工程技术股份有限公司 | Steel scrap preheating type electric arc furnace and method of improving heating cold area of side wall charging electric arc furnace |
| WO2017071312A1 (en) * | 2015-10-30 | 2017-05-04 | 中冶赛迪工程技术股份有限公司 | Steel scrap preheating-type electric arc furnace and method for improving heating cold area of side wall charging electric arc furnace |
| EP3467418A4 (en) * | 2016-05-30 | 2019-12-18 | CISDI Engineering Co., Ltd | Feeder device utilized in electric arc furnace, and flue gas and temperature control method |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160302 Effective date of abandoning: 20170929 |