CN105627733A - Electric-arc furnace shock-resistant baffling charging steel scrap preheating chamber-dedusting structure - Google Patents
Electric-arc furnace shock-resistant baffling charging steel scrap preheating chamber-dedusting structure Download PDFInfo
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- CN105627733A CN105627733A CN201610177906.XA CN201610177906A CN105627733A CN 105627733 A CN105627733 A CN 105627733A CN 201610177906 A CN201610177906 A CN 201610177906A CN 105627733 A CN105627733 A CN 105627733A
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- arc furnace
- steel scrap
- baffling
- preheating room
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
- F27B3/08—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces heated electrically, with or without any other source of heat
- F27B3/085—Arc furnaces
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/52—Manufacture of steel in electric furnaces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
- F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
- F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
- F27B3/18—Arrangements of devices for charging
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D13/00—Apparatus for preheating charges; Arrangements for preheating charges
- F27D13/002—Preheating scrap
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/001—Extraction of waste gases, collection of fumes and hoods used therefor
- F27D17/003—Extraction of waste gases, collection of fumes and hoods used therefor of waste gases emanating from an electric arc furnace
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27M—INDEXING SCHEME RELATING TO ASPECTS OF THE CHARGES OR FURNACES, KILNS, OVENS OR RETORTS
- F27M2001/00—Composition, conformation or state of the charge
- F27M2001/02—Charges containing ferrous elements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Furnace Details (AREA)
Abstract
The invention discloses an electric-arc furnace shock-resistant baffling charging steel scrap preheating chamber-dedusting structure, and belongs to the technical field of metallurgy. The electric-arc furnace shock-resistant baffling charging steel scrap preheating chamber-dedusting structure comprises a steel scrap preheating chamber arranged obliquely, wherein a discharge port in the lower end of the steel scrap preheating chamber is connected with an electric-arc furnace; a dedusting pipe chamber is arranged at the upper end of the steel scrap preheating chamber; a finger-like bracket is arranged at an interface side of the steel scrap preheating chamber and the electric-arc furnace; the steel scrap preheating chamber is provided with at least one bending part; a charging port is formed directly above the upper end of the steel scrap preheating chamber; and a vertical projection surface of the charging port can not be directly projected onto the finger-like bracket. By bending the vertical the steel scrap preheating chamber, steel scrap is completely prevented from directly falling onto the finger-like bracket, the movement direction of the steel scrap is changed by employing oblique surface flow guide, and internal friction and impact are generated in the steel scrap, so that impact energy of the steel scrap on the finger-like bracket is consumed, the falling height of the steel scrap is reduced, the maintenance frequency of a scrap preheating device is reduced greatly, and the reliability of equipment is improved greatly. The electric-arc furnace shock-resistant baffling charging steel scrap preheating chamber-dedusting structure has high popularization value on the electric-arc furnace.
Description
Technical field
The invention belongs to metallurgical technology field, it is specifically related to the reinforced scrap steel preheating room-dedusting structure of a kind of electric arc furnace shock resistance baffling.
Background technology
Energy-conservation, consumption reduction in electric-arc furnace steelmaking, environmental protection are one of the core technologies of whole world EAF steelmaking technology development always. Wherein, electric arc furnace smoke pre-heating steel 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 big, only having a small amount of scheme to drop into actual use at present, typical case represents CONSTEEL (US5400358-1992) technology such as finger shaft (DE4025249A1-1992), vertical shaft thruster reinforced (US2007/0013112A1) and vibration continuous charging.
Finger shaft electric arc furnace is the open and development in early 1990s of FUCS company of Germany, being a kind of typical steel scrap preheating device of electric arc furnace, so-called " finger " refers to that being connected between interface at shaft furnace and electric arc furnace has the finger class bracket opened and closed by mechanism of single row or multiple rows. In arc furnace smelting procedure, by directly adding steel scrap and make full use of waste gas to the warm-up ability of steel scrap in exhaust flow, it is not only and utilizes tangible energy, and utilize the chemical energy of secondary combustion. Therefore, the scrap steel preheating technology of this kind of band material-supporting device can penetrate steel scrap layer because of flue gas, pre-heating energy-saving effect is better, a ton steel 60��100kw.h can be reached, but, owing to steel scrap is to the direct impact of finger class bracket in Classical Shaft Furnace, it is easy to cause being smashed by steel scrap, add maintenance of the equipment, have impact on promoting the use of of scrap steel preheating technology.
For this reason, if avoiding steel scrap directly to pound fall finger class bracket, just can significantly reduce the impact of the reinforced process of steel scrap, reducing the maintenance of equipment.
Summary of the invention
In view of this, it is an object of the invention to provide a kind of shock resistance baffling feeding technique to scrap steel preheating type electric arc furnace, and when making to be fed in raw material scrap steel preheating room with outside reinforced hanging basket, avoiding occurring that steel scrap is directly pounded drops on finger class bracket, meanwhile, scrap steel preheating room is arranged on elastic support structure, promotes the impact resistance of scrap steel preheating room further, thus reduce the maintenance of equipment, it is to increase the security of production; And in conjunction with the layout of baffling side and dust removing tube room, the blanking height of reduction equipment as far as possible, and then to the impact of equipment in the reinforced process of reduction steel scrap, it is to increase equipment dependability.
For achieving the above object, the present invention provides following technical scheme: the reinforced scrap steel preheating room-dedusting structure of a kind of electric arc furnace shock resistance baffling, comprising the scrap steel preheating room being obliquely installed, the lower end discharge port in described scrap steel preheating room is connected with electric arc furnace, and its upper end is provided with dust removing tube room; The interface side of described scrap steel preheating room and electric arc furnace is provided with finger class bracket, for barrier steel scrap or control blanking, described scrap steel preheating room has at least one bending, has offered charging opening directly over its upper end, and the vertical plane making charging opening cannot directly project on finger class bracket.
Further, described scrap steel preheating room has the trench bottom that section is recessed arc.
Further, described charging opening is provided with hermatic door, and described hermatic door is sliding type or flip structure.
Further, described finger class bracket is backgauge tooth harrow or finger.
Further, described dust removing tube room is located on any non-baffling side of scrap steel preheating room upper periphery.
Further, described scrap steel preheating room is provided with vibrator on the baffling side close with electric arc furnace or sidewall.
Further, described scrap steel preheating room is arranged on elastic support structure.
Further, described elastic support structure is one or more combinations in multilayer cantilever leaf spring, multilayer letter leaf spring, butterfly spring, whisker or connecting rod.
Further, being also provided with and the dw that outside charging chute matches above described charging opening, dw, outside charging chute and scrap steel preheating room form two times reinforced different side bendings of steel scrap baffling.
The useful effect of the present invention is:
1, by offering charging opening directly over upper end, scrap steel preheating room and be machined to a rare bending on its sidewall, and charging opening projection plane in vertical direction is made cannot directly to project on finger class bracket; Namely, when this technology feature makes vertically to feed in raw material by the reinforced hanging basket in outside, its steel scrap material cannot directly be pounded and fall on finger class bracket, is beneficial to and reduces steel scrap material to the impact of finger class bracket, reduces the maintenance of equipment, it is to increase the efficiency of production and security.
2, by combining the layout of bending and dust removing tube room, and the size of charging opening is considered, usually can on the inclined-plane of indoor appearance at least two water conservancy diversion of scrap steel preheating, these two inclined-planes can effectively reduce the blanking height of steel scrap, reduces blanking to the impact on inclined-plane; Meanwhile, these two inclined-planes also change the direction of motion of blanking so that produce friction between the material vertically fallen and material with mutually impacting, consume impact energy, thus reduce steel scrap to the impact of equipment.
The scrap steel preheating room 3, with bending reduces the spatial altitude of the scrap steel preheating room of same volume, and then decreases with amount steel scrap the impact energy of equipment.
4, by scrap steel preheating room is arranged on elastic support structure, decrease steel scrap material to the impact in baffling face, scrap steel preheating room, enhance the life-span of scrap steel preheating room.
5, by making at the bottom of recessed deep-slotted chip breaker in bottom, scrap steel preheating room, it is to increase scrap steel preheating room is hit the impact resistance in face, and improves its cloth and the fitness of the arc type of furnace.
6, by arranging vibrator on scrap steel preheating room, and be combined into elastic support structure and there is buffering and vibrational system, the noncontact formula vibrational system of this System's composition and steel scrap material, as the power transportation means of the steel scrap after possible preheating and high spud angle scrap steel preheating room (with horizontal plane 30��65 ��) or the repeatedly steel scrap of baffling, namely once steel scrap and the industrial accident of scrap steel preheating room bonding or jam occur, it is possible to adopt this propulsion means that steel scrap is added electric arc furnace. Simultaneously, the steel scrap vibrating transportation that this vibrator provides, following indirect effect can also be brought: scrap steel preheating room bottom land selects less inclination angle, thus reduce steel scrap further to the impact of equipment, and when can be caught on by backgauge tooth harrow after steel scrap adds scrap steel preheating room and stablize the scrap steel preheating device of backgauge tooth harrow structure (this specific function be only limitted to), appropriateness extraction section rake teeth, reduces the thermal load of vital part tooth harrow, it is to increase scrap steel preheating effect; And the steel scrap nature landing when tooth harrow is extracted out reinforced that relatively small inclination (such as 40 degree, inclination angle) scrap steel preheating room may be brought is not smooth, it is possible to lured by vibrator or forced vibration is carried and solved. And vibrator vibration control coordinates with finger class bracket (backgauge tooth harrow) aperture, it is possible to the controllable continuous realizing steel scrap material is fed in raw material.
Generally speaking, above-mentioned technology greatly reduces steel scrap material to the impact of finger class bracket, reduces the maintenance of such scrap steel preheating the weakest part of device, thus improves equipment and run overall reliability, reduce and safeguard, have huge investment and the advantage of construction.
Accompanying drawing explanation
In order to make the object of the present invention, technical scheme and useful effect clearly, the present invention provides following accompanying drawing to be described: wherein:
Fig. 1 is the structural representation of the reinforced scrap steel preheating room-dedusting structure (baffling) of shock resistance baffling of the present invention;
Fig. 2 is the sectional schematic diagram of scrap steel preheating room in the reinforced scrap steel preheating room-dedusting structure of shock resistance baffling of the present invention;
Fig. 3 is that in the reinforced scrap steel preheating room-dedusting structure (baffling) of shock resistance baffling of the present invention, finger class bracket is the structural representation of backgauge tooth harrow;
Fig. 4 is the schematic diagram of elastic support structure one in the reinforced scrap steel preheating room-dedusting structure (baffling) of shock resistance baffling of the present invention;
Fig. 5 is the schematic diagram of elastic support structure two in the reinforced scrap steel preheating room-dedusting structure (baffling) of shock resistance baffling of the present invention;
Fig. 6 is the schematic diagram of elastic support structure three in the reinforced scrap steel preheating room-dedusting structure (two different side bafflings) of shock resistance baffling of the present invention;
Fig. 7 is twice baffling schematic diagram that in the reinforced scrap steel preheating room-dedusting structure (two different side bafflings) of shock resistance baffling of the present invention, steel scrap is reinforced
Reference numeral: 1-electric arc furnace body; 2-points class bracket; 3-scrap steel preheating room; 4-hermatic door; 5-dust removing tube room; 6-steel scrap material; 7-vibrator; 8-spring cupport structure; 9-dust excluding hood; The outside charging chute of 10-; The reinforced hanging basket in 11-outside; In figure, arrow line represents steel scrap material baffling direction.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail.
As shown in Figure 1, impact baffling in the present embodiment feeds in raw material scrap steel preheating room-dedusting structure, comprise the scrap steel preheating room 3 being obliquely installed with electric arc furnace body 1, angle between described scrap steel preheating room 3 and horizontal plane is 30 �㡫65 ��, by being arranged on, its lower end discharge port is connected with electric arc furnace body 1 in described scrap steel preheating room 3, its upper end is provided with dust removing tube room 5, and described scrap steel preheating room 3 is provided with a finger class bracket 2 with the interface side of electric arc furnace body 1, for barrier steel scrap material 6 or control blanking; Described scrap steel preheating room 3 has a bending, has offered charging opening (unmarked) directly over its upper end, and the vertical plane making charging opening cannot directly project on finger class bracket. Like this, the scrap steel preheating room 3 of bending makes charging opening projection plane in vertical direction cannot directly project on finger class bracket 2, when making vertically to feed in raw material by the reinforced hanging basket 11 in outside, its steel scrap material 6 cannot directly be pounded and fall on finger class bracket 2, it is beneficial to and reduces steel scrap material 6 to the impact of finger class bracket, the maintenance of minimizing equipment, it is to increase the efficiency of production and security. Certainly, in different embodiments, the quantity of described bending can according to electric arc furnace, and the size of scrap steel preheating room and steel scrap material is selected one or more.
As shown in Figure 2, the described scrap steel preheating room 3 in the present embodiment has the trench bottom that section is recessed arc. Like this, be conducive to improving scrap steel preheating room and it be hit the impact resistance in face, and improve its cloth and the fitness of the electric furnace circular arc type of furnace. Described scrap steel preheating room 3 additionally uses water-cooling structure, for improving the work-ing life of scrap steel preheating room.
Upper end, described scrap steel preheating room 3 charging opening in the present embodiment is provided with sliding sealing door 4. Like this, it is possible to scrap steel preheating room 3 is played the effect closed and open, sliding structure is beneficial to operation control simultaneously. As shown in Figure 3, when sliding sealing door 4 is closed from left to right, can flow into from charging opening by airtight air, force the steel scrap of plume penetration scrap steel preheating room 3, prevent flue gas excessive. Certainly, in different embodiments, described hermatic door 4 also can be flip structure, can achieve the above object equally.
Described dust removing tube room 5 in the present embodiment is located on any non-baffling side of scrap steel preheating room 3 upper periphery, to prevent material falls into dust removing tube.
As shown in Figure 3, the described finger class bracket 2 in the present embodiment is backgauge tooth harrow, and described backgauge tooth harrow comprises rake teeth, rabble arm and crossbeam. during use, as shown in Figure 4, for adopting the outside vertical feed way of reinforced hanging basket 11, the scrap steel preheating room 3 with a bending has two to lead material inclined-plane 3a, 3b, and wherein leading material inclined-plane 3b is that shock resistance and cloth characteristic can make recessed arcuate bottom. open hermatic door 4, dust removing tube room 5 exhausting reduces diffussion of dust, when steel scrap material 6 falls from charging opening upper vertical, successively clash into and lead material inclined-plane 3a, during 3b, whole each part of steel scrap material 6 can successively occur direction to change, and cause phase mutual friction and the collision of steel scrap material 6 inside, final landing is blocked by backgauge tooth harrow, steel scrap material 6 in outside reinforced hanging basket 11, owing to the vertical plane of charging opening cannot directly project on finger class bracket, can not directly directly pound on backgauge tooth harrow by freely falling body in theory, reduce steel scrap material 6 to the impact of equipment, and major part steel scrap material 6 expects inclined-plane 3a with leading, the drop of 3b contact, can much smaller than directly pounding the spatial altitude fallen.
The room of scrap steel preheating described in the present embodiment 3 is provided with vibrator 7 on the baffling side close with electric arc furnace body 1 or sidewall, and is arranged on elastic support structure 8. Like this, by the vibrator 7 connected on scrap steel preheating room 3, and the buffering and the vibrational system that constitute scrap steel preheating room 3 is combined with elastic support structure 8, preheating chamber 3 plays buffering steel scrap material 6 to the impact effect of scrap steel preheating room 3 when accepting steel scrap material 6, it is also possible to power transportation means when blocking high spud angle scrap steel preheating room 3 as the steel scrap material 6 after possible preheating. Concrete, high spud angle (with 30��65 degree, horizontal plane) scrap steel preheating room 3 is the main transportation means of steel scrap, and main conveying power is the gravity of steel scrap. Such as, it is contemplated that the frictional coefficient of steel scrap and groove is 0.5, bottom surface, scrap steel preheating room 3 and 45 degree, horizontal plane inclination angle, then open backgauge tooth harrow, steel scrap material 6 can nature landing; But, scrap steel preheating makes steel scrap thermal expansion produce the extruding of preheating chamber 3 wall, and existence may make steel scrap be compressed on preheating chamber 3 wall, steel scrap cannot to be come off naturally, and this can cause industrial accident; The now vibrations to preheating chamber of vibrator 7, certain power conveying power is provided, and the bridging structure between loose steel scrap block that can shake, the excessive extruding of release steel scrap and preheating chamber wall, the steel scrap that loose casu is wound around one departs from the bottom land in preheating chamber and sidewall generation slippage, brings out the landing of steel scrap material in preheating chamber. Vibrator 7 (must open finger class bracket when vibrator works) can when there is steel scrap high temperature bond with scrap steel preheating room 3 in steel scrap material 6, this propulsion means can be adopted to bring out with noncontact formula or powerful driving helps steel scrap material 6 to depart from scrap steel preheating room 3 trench bottom, and carry landing in electric arc furnace. In addition, the steel scrap vibrating transportation that vibrator 7 provides, following indirect effect can also be brought: scrap steel preheating room 3 bottom land selects relatively little inclination value (as getting 30��40 ��), this design reduces the total height of preheating chamber 3 and equipment on the one hand, when the backgauge tooth harrow that may bring compared with small inclination preheating chamber on the other hand is extracted out reinforced, the landing of steel scrap nature is not smooth, it is possible to lured by vibrator after opening tooth harrow or forced vibration is carried and solved.
In addition, steel scrap material 6 caught on by backgauge tooth harrow after adding scrap steel preheating room 3 and stable after, utilize the mutual winding characteristic of steel scrap and tilt preheating chamber steel scrap sliding force and weaken characteristic, can appropriateness extraction section rake teeth, to reduce the thermal load of vital part, improve the life-span of backgauge tooth harrow, and improve the pre-heat effect (this special scrap steel preheating device being only limitted to tooth harrow structure) to steel scrap material. And vibrator 7 vibration control coordinates with finger class bracket (backgauge tooth harrow) aperture, it is possible to the controllable continuous realizing steel scrap material is fed in raw material.
It should be noted that, bondd by steel scrap for eliminating backgauge tooth harrow or bring out the conveying landing of steel scrap material 6 at scrap steel preheating room 3 bottom land, it is also possible to crossbeam or rabble arm at backgauge tooth harrow arrange vibrator.
As shown in Figure 4, the resilient support(ing)member 8 in figure is multilayer cantilever plate spring structure, and is fixedly connected with dolly (unmarked). In various embodiments, it is possible to make in multilayer letter plate spring structure or Fig. 5 by whisker and what connecting rod combination was formed in or Fig. 6 in series by multiple butterfly spring, or other all kinds of elasticity or swing supporting structure.
The present embodiment also has a further optimal enforcement scheme, such as Fig. 6, shown in Fig. 7, namely outside reinforced hanging basket 11 replaces to outside charging chute 10 and (can be hung away by crane, as steel scrap transportation means), also it is provided with above described charging opening and the dw 9 that this outside charging chute 10 matches simultaneously, outlet at outside charging chute 10 is provided with the hermatic door (unmarked) doing straight line up-and-down movement, outside charging chute 10 and dust excluding hood 9 together form many bending shock resistance structures with scrap steel preheating room 3, and reinforced process has been carried out smoke impervious by dw 9, ensure that heat smoke can not emit outward. namely when steel scrap material 6 preheating of scrap steel preheating room 3, outside charging chute 10 lifts to settle and docks with dust excluding hood 9 side direction, the hermatic door 4 opening scrap steel preheating room 3 also constitutes a dedusting structure, and the hermatic door opened on outside charging chute 10 just can complete the reinforced work to scrap steel preheating room 3. twice bending baffling of steel scrap stream is fed in raw material by dw in the program, outside charging chute and scrap steel preheating room by the reinforced process implementation of steel scrap, a large amount of consumption steel scrap gravitional force, greatly reduce the shock load to component such as tooth harrow, preheating chamber bottom lands, it is to increase equipment life.
Fig. 6 executes example, outside charging chute 10 can also as stationary hopper, now, it is possible to cancel in outside charging chute 10 on the hermatic door or scrap steel preheating room 3 that are provided with in the hermatic door 4 arranged, to simplify structure.
The action process of the present invention is described below in conjunction with accompanying drawing:
Such as Fig. 3, electric arc furnace is smelted, and sliding sealing door 4 is closed, and prevents air from entering dust removing tube room 5, and now electric arc furnace flue gas is directed in scrap steel preheating room 3, penetrates backgauge tooth harrow and steel scrap material 6 is taken away by dust removing tube room 5, and steel scrap material 6 obtains preheating. When, after preheating certain time, driving backgauge tooth harrow to open, the steel scrap material 6 after preheating slides to electric arc furnace body 1 center along scrap steel preheating room 3 bottom land tilted.
Such as Fig. 4 or 5, after steel scrap material 6 after preheating in scrap steel preheating room 3 enters electric arc furnace body 1, when sliding sealing door 4 is opened from right to left, now wait that the reinforced hanging basket in the outside above the charging opening of scrap steel preheating room 3 11 is that scrap steel preheating room 3 carries out semi-enclosed feeding in raw material, its steel scrap material 6 is subject to, in indoor 3 dropping process of scrap steel preheating, the impact bending the water conservancy diversion inclined-plane of generation on scrap steel preheating room 3, produce the baffling of different directions and mutual collision between material and material and friction, finally blocked by backgauge tooth harrow, this landing process reduces the surging force that backgauge tooth harrow is subject to. period, if the steel scrap material 6 nature landing when backgauge tooth harrow is extracted out reinforced that relatively the scrap steel preheating room 3 of small inclination (such as 40 degree, inclination angle) may be brought is not smooth, if or when there is steel scrap blanking jam on scrap steel preheating room 3 in steel scrap material 6, by the vibration of vibrator 7 steel scrap, the loose steel scrap that shakes carries out vibrating transportation, allows steel scrap material 6 normally be entered in electric arc furnace. and vibrator 7 vibration control coordinates with backgauge tooth harrow aperture, it is possible to the controllable continuous realizing steel scrap material 6 is fed in raw material.
Or such as Fig. 6, Fig. 7, when scrap steel preheating room 3 is carried out reinforced by the outside charging chute 10 transported or fix by hanging, sliding sealing door 4 is opened, backgauge tooth harrow 2 is closed, the steel scrap that charging chute 10 adds has to pass through twice baffling and is just slipped to backgauge tooth harrow, utilize steel scrap and bottom land, steel scrap and the friction between dw 9, steel scrap and steel scrap to consume steel scrap gravitional force in a large number, this reduces the surging force that backgauge tooth harrow 2 is subject to, it is to increase the reliability of backgauge tooth harrow 2. Meanwhile, outside charging chute 10, dust removing tube room 5, dw 9 constitute again the improvement to flue dust sealing so that flue gas is excessive to be greatly improved than directly feeding in raw material shown in Fig. 1��Fig. 4.
What finally illustrate is, above preferred embodiment is only in order to illustrate the technical scheme of the present invention and unrestricted, although by above preferred embodiment to invention has been detailed description, but those skilled in the art are to be understood that, in the form and details it can be made various change, and do not deviate claims of the present invention limited range.
Claims (9)
1. the reinforced scrap steel preheating room-dedusting structure of electric arc furnace shock resistance baffling, comprises the scrap steel preheating room being obliquely installed, and the lower end discharge port in described scrap steel preheating room is connected with electric arc furnace, and its upper end is provided with dust removing tube room; The interface side of described scrap steel preheating room and electric arc furnace is provided with finger class bracket, for barrier steel scrap or control blanking, it is characterized in that: described scrap steel preheating room has at least one bending, charging opening has been offered, and the vertical plane making charging opening cannot directly project on finger class bracket directly over its upper end.
2. the reinforced scrap steel preheating room-dedusting structure of electric arc furnace shock resistance baffling according to claim 1, it is characterised in that: described scrap steel preheating room has the trench bottom that section is recessed arc.
3. the reinforced scrap steel preheating room-dedusting structure of electric arc furnace shock resistance baffling according to claim 1, it is characterised in that: described charging opening is provided with hermatic door, and described hermatic door is sliding type or flip structure.
4. the reinforced scrap steel preheating room-dedusting structure of electric arc furnace shock resistance baffling according to claim 1, it is characterised in that: described finger class bracket is backgauge tooth harrow or finger.
5. the reinforced scrap steel preheating room-dedusting structure of electric arc furnace shock resistance baffling according to claim 1, it is characterised in that: described dust removing tube room is located on any non-baffling side of scrap steel preheating room upper periphery.
6. the reinforced scrap steel preheating room-dedusting structure of electric arc furnace shock resistance baffling according to claim 1, it is characterised in that: described scrap steel preheating room is provided with vibrator on the baffling side close with electric arc furnace or sidewall.
7. the reinforced scrap steel preheating room-dedusting structure of electric arc furnace shock resistance baffling according to claim 1, it is characterised in that: described scrap steel preheating room is arranged on elastic support structure.
8. the reinforced scrap steel preheating room-dedusting structure of electric arc furnace shock resistance baffling according to claim 7, it is characterised in that: described elastic support structure is one or more combinations in multilayer cantilever leaf spring, multilayer letter leaf spring, butterfly spring, whisker or connecting rod.
9. the reinforced scrap steel preheating room-dedusting structure of electric arc furnace shock resistance baffling according to claim 1, it is characterized in that: be also provided with above described charging opening and the dw that outside charging chute matches, dw, outside charging chute and scrap steel preheating room form two times reinforced different side bendings of steel scrap baffling.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610177906.XA CN105627733B (en) | 2016-02-29 | 2016-03-25 | A kind of electric arc furnaces shock resistance baffling charging scrap steel preheating room-dedusting structure |
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| CN2016101119958 | 2016-02-29 | ||
| CN201610111995 | 2016-02-29 | ||
| CN201610177906.XA CN105627733B (en) | 2016-02-29 | 2016-03-25 | A kind of electric arc furnaces shock resistance baffling charging scrap steel preheating room-dedusting structure |
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| CN105627733A true CN105627733A (en) | 2016-06-01 |
| CN105627733B CN105627733B (en) | 2018-08-14 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106979693A (en) * | 2017-03-07 | 2017-07-25 | 宁波钢铁有限公司 | Automatic discharge sealing device for LPD type preheater feed back elephant trunks |
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