CN110173976A - A kind of electric arc furnaces reinforcing scrap preheater - Google Patents

A kind of electric arc furnaces reinforcing scrap preheater Download PDF

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Publication number
CN110173976A
CN110173976A CN201910446565.5A CN201910446565A CN110173976A CN 110173976 A CN110173976 A CN 110173976A CN 201910446565 A CN201910446565 A CN 201910446565A CN 110173976 A CN110173976 A CN 110173976A
Authority
CN
China
Prior art keywords
scrap
steel scrap
electric arc
transfer passage
arc furnaces
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201910446565.5A
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Chinese (zh)
Inventor
周涛
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CISDI Technology Research Center Co Ltd
Original Assignee
CISDI Technology Research Center Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by CISDI Technology Research Center Co Ltd filed Critical CISDI Technology Research Center Co Ltd
Priority to CN201910446565.5A priority Critical patent/CN110173976A/en
Publication of CN110173976A publication Critical patent/CN110173976A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27BFURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
    • F27B3/10Details, accessories, or equipment peculiar to hearth-type furnaces
    • F27B3/20Arrangements of heating devices
    • F27B3/205Burners
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27BFURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
    • F27B3/10Details, accessories, or equipment peculiar to hearth-type furnaces
    • F27B3/28Arrangement of controlling, monitoring, alarm or the like devices
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D13/00Apparatus for preheating charges; Arrangements for preheating charges

Abstract

The invention discloses a kind of electric arc furnaces to strengthen scrap preheater, which includes: the steel scrap transfer passage (2) and exhaust gases passes (4) being separated by flase floor (6);Vibrating material feeding device (11) is set to the inlet of the steel scrap transfer passage, communicates with steel scrap transfer passage;Electric arc furnaces (1) is set to the exit of the steel scrap transfer passage, communicates respectively with steel scrap transfer passage, exhaust gases passes.Electric arc furnaces steel scrap strengthening preheating device provided by the invention, steel scrap transfer passage and flue gas vent passages are separated, high-temperature flue gas mainly among steel scrap transfer passage and flue gas vent passages water-cooled beam and flase floor pass through, flue gas is to pass through the steel scrap bed of material from bottom to top, heat convection is directly carried out with steel scrap, so scrap steel preheating temperature is high, and lower uniform.

Description

A kind of electric arc furnaces reinforcing scrap preheater
Technical field
The present invention relates to field of metallurgy, and in particular to a kind of electric arc furnaces reinforcing scrap preheater.
Background technique
It is well known that scrap steel preheating is one of the developing direction of electric steel power-saving technology, for the useless of electric-arc furnace steelmaking There are mainly two types of forms for steel preheating device: vertical and horizontal.Although the vertical thermal efficiency is higher, scrap steel preheating temperature is higher, It requires the absolute altitude of workshop very high, and equipment is huge, and one-time investment is very high, and the inadaptable transformation for just having electric furnace shop.At present The multi-purpose continuous scrap heating device of horizontal in the country, but it is uneven under preheating temperature at present, and enter the useless of electric furnace entrance Steel temperature only has 350 DEG C, differs larger with publicized 500-600 DEG C.
Summary of the invention
In view of the foregoing deficiencies of prior art, the present invention provides a kind of electric arc furnaces reinforcing scrap preheater, to It solves the problems, such as non-uniform under prior art preheating temperature.
In order to achieve the above objects and other related objects, the present invention provides a kind of electric arc furnaces reinforcing scrap preheater, should Scrap preheater includes:
Steel scrap transfer passage 2 and exhaust gases passes 4 are separated by flase floor 6, the steel scrap transfer passage is set to described The top of exhaust gases passes;
Vibrating material feeding device 11 is set to the inlet of the steel scrap transfer passage, communicates with steel scrap transfer passage;
Electric arc furnaces 1 is set to the exit of the steel scrap transfer passage, respectively with steel scrap transfer passage, exhaust gases passes phase It is logical.
Optionally, the steel scrap transfer passage is obliquely installed.
Optionally, further include air distribution plate 4a, the flase floor and the air distribution plate along high-temperature gas dispersal direction successively Setting.
It optionally, further include water-cooled beam 5, dispersal direction of the water-cooled beam with the flase floor along high-temperature gas is successively set It sets.
It optionally, further include several burner noz(zle)s 9 being set on the exhaust gases passes or the/steel scrap transfer passage, Each burner noz(zle) is connected to combustion gas supervisor 14 through a combustion gas branch pipe 10.
Optionally, flow control valve 12 is provided on the combustion gas supervisor.
Optionally, exhaust fume collecting hood 3 is provided on the steel scrap transfer passage.
Optionally, the steel scrap transfer passage is connect with the exhaust fume collecting hood by movable sealer 3b.
Optionally, the end of the steel scrap transfer passage at electric arc furnaces end is provided with gas baffle 7.
Optionally, further include temperature-detecting device 8 for detecting steel scrap temperature.
As described above, a kind of electric arc furnaces of the invention strengthens scrap preheater, have the advantages that
1, electric arc furnaces steel scrap strengthening preheating device provided by the invention, by steel scrap transfer passage and flue gas vent passages point Open, high-temperature flue gas mainly among steel scrap transfer passage and flue gas vent passages water-cooled beam and flase floor pass through, flue gas be from Across the steel scrap bed of material on down, heat convection is directly carried out with steel scrap, so scrap steel preheating temperature is high, and lower uniform.
2, the present invention is equipped with gas nozzle below steel scrap transfer passage, when electric furnace is in non-smelting device, due to flue gas temperature It spends lower, burning natural gas etc. can be passed through and carry out afterburning, flue-gas temperature is improved, guarantee scrap steel preheating temperature.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that a kind of electric arc furnaces of the present invention strengthens scrap preheater embodiment;
Fig. 2 is the sectional view that a kind of electric arc furnaces of the present invention strengthens scrap preheater;
Fig. 3 is exhaust gases passes bottom cloth scoreboard schematic diagram;
Wherein, 1, electric arc furnaces, 2, steel scrap transfer passage, 3, exhaust fume collecting hood, 3b, movable sealer, 4, exhaust gases passes, 4a, Air distribution plate, 5, water-cooled beam, 6, flase floor, 7, gas baffle, 8, steel scrap temperature-detecting device, 9, burner noz(zle), 10, combustion gas branch Pipe, 11, vibrating material feeding device, 12, flow control valve, 13, chimney, 14, combustion gas supervisor, A, electric furnace flue gas, B, steel scrap.
Specific embodiment
Illustrate embodiments of the present invention below by way of specific specific example, those skilled in the art can be by this specification Other advantages and efficacy of the present invention can be easily understood for disclosed content.The present invention can also pass through in addition different specific realities The mode of applying is embodied or practiced, the various details in this specification can also based on different viewpoints and application, without departing from Various modifications or alterations are carried out under spirit of the invention.It should be noted that in the absence of conflict, following embodiment and implementation Feature in example can be combined with each other.
It should be noted that illustrating the basic structure that only the invention is illustrated in a schematic way provided in following embodiment Think, only shown in schema then with related component in the present invention rather than component count, shape and size when according to actual implementation Draw, when actual implementation kenel, quantity and the ratio of each component can arbitrarily change for one kind, and its assembly layout kenel It is likely more complexity.
As shown in Figure 1, the present embodiment provides a kind of electric arc furnaces to strengthen scrap preheater, which includes:
Steel scrap transfer passage 2 and exhaust gases passes 4 are separated by flase floor 6, the steel scrap transfer passage is set to described The top of exhaust gases passes;Vibrating material feeding device 11 is set to the inlet of the steel scrap transfer passage, with steel scrap transfer passage phase It is logical;Electric arc furnaces 1 is set to the exit of the steel scrap transfer passage, communicates respectively with steel scrap transfer passage, exhaust gases passes.Institute It states steel scrap transfer passage to be obliquely installed, by shaking so that the steel scrap in inclined steel scrap delivery chute conveys from high to low.Flue gas The surrounding in channel 2 and bottom are water cooled membrane wall.
Specifically, steel scrap transfer passage outlet is goed deep into electric furnace 1, and high-temperature flue gas A passes through the cigarette below steel scrap transfer passage Gas channel 4 enters scrap preheater, then passes through and carries out heat convection with steel scrap B after the grid 6 on scrap steel preheating channel.
In an embodiment, which is additionally provided with air distribution plate 4a, the flase floor and the air distribution plate edge The dispersal direction of high-temperature gas is set gradually.As shown in Fig. 2, air distribution plate is set on flase floor, high-temperature flue gas first passes through lattice Screen, then again by air distribution plate so that high-temperature flue gas accelerates across steel scrap uniformly through cloth scoreboard, be more advantageous to flue gas with Heat exchange between steel scrap.Specifically, the aperture 4b of air distribution plate is 5-8mm.
In an embodiment, which further includes water-cooled beam 5, and the water-cooled beam and the flase floor are along high temperature The dispersal direction of gas is set gradually.As shown in Fig. 2, water-cooled beam 5 is set to bottom, water-cooled beam, air distribution plate is arranged in flase floor It is set on flase floor, water-cooled beam and flase floor are specifically played a supporting role.
In an embodiment, as shown in Figure 1, the scrap preheater further include be set to the exhaust gases passes or/it is described Several burner noz(zle)s 9 on steel scrap transfer passage, each burner noz(zle) are connected to a combustion gas through a combustion gas branch pipe 10 and are responsible for 14。
Specifically, gas nozzle 9 is set to the bottom of steel scrap transfer passage 4, when scrap steel preheating temperature is lower than design temperature When, pressure heating is carried out by burning natural gas or blast furnace gas, improves the steel scrap temperature for entering electric furnace.
It is provided with flow control valve 12 on combustion gas supervisor, for the flue gas flow of regulating gas burning, steel scrap transfer passage Exit be equipped with temperature-detecting device 8, it is chain with gas consumption adjusting valve 12, for detecting the temperature of steel scrap.Pass through temperature The cooperation of detection device and flow control valve can achieve the purpose of control scrap steel preheating temperature.
In an embodiment, it is provided with exhaust fume collecting hood 3 on the steel scrap transfer passage, is equipped with thermal insulating material at the top of exhaust fume collecting hood Material, the end of exhaust fume collecting hood are provided with chimney, and the flue gas after preheating scrap enters the chimney 13 at collection offal end after being collected by exhaust fume collecting hood Discharge.
In an embodiment, the steel scrap transfer passage is connect with the exhaust fume collecting hood by movable sealer 3b, the work Dynamic sealing device can guarantee that the flue gas after scrap steel preheating is not revealed.
In an embodiment, the end of the steel scrap transfer passage at electric arc furnaces end is provided with gas baffle 7.
Electric arc furnaces steel scrap strengthening preheating device provided by the invention, steel scrap transfer passage and flue gas vent passages are separated, High-temperature flue gas mainly among steel scrap transfer passage and flue gas vent passages water-cooled beam and flase floor pass through, flue gas be from lower and On across the steel scrap bed of material, directly carry out heat convection with steel scrap, so scrap steel preheating temperature is high, and it is lower it is upper uniformly.
The present invention controls scrap steel preheating temperature by control steel scrap charging rate, burns natural gas under limiting case and strengthens in advance Heat.Under normal smelting condition, four hole flue-gas temperatures of electric arc furnaces are at 1500-1800 DEG C.At 1500 DEG C of flue-gas temperature, give up Steel passage length be not less than 5 meters under conditions of, can achieve specified preheating temperature, so that bottom scrap steel preheating temperature is greater than 600 DEG C, upper layer scrap steel preheating temperature can be more than 400 DEG C.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe The personage for knowing this technology all without departing from the spirit and scope of the present invention, carries out modifications and changes to above-described embodiment.Cause This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by those of ordinary skill in the art such as At all equivalent modifications or change, should be covered by the claims of the present invention.

Claims (10)

1. a kind of electric arc furnaces strengthens scrap preheater, which is characterized in that the scrap preheater includes:
The steel scrap transfer passage (2) and exhaust gases passes (4) being separated by flase floor (6);
Vibrating material feeding device (11) is set to the inlet of the steel scrap transfer passage, communicates with steel scrap transfer passage;
Electric arc furnaces (1) is set to the exit of the steel scrap transfer passage, communicates respectively with steel scrap transfer passage, exhaust gases passes.
2. a kind of electric arc furnaces according to claim 1 strengthens scrap preheater, which is characterized in that the steel scrap conveying is logical Road is obliquely installed.
3. a kind of electric arc furnaces according to claim 1 strengthens scrap preheater, which is characterized in that further include air distribution plate (4a), dispersal direction of the flase floor with the air distribution plate along high-temperature gas are set gradually.
4. a kind of electric arc furnaces according to claim 3 strengthens scrap preheater, which is characterized in that further include water-cooled beam (5), dispersal direction of the water-cooled beam with the flase floor along high-temperature gas is set gradually.
5. a kind of electric arc furnaces according to claim 1 strengthens scrap preheater, which is characterized in that further include being set to institute Several burner noz(zle)s (9) on exhaust gases passes or the/steel scrap transfer passage are stated, each burner noz(zle) is through a combustion gas branch pipe (10) it is connected to combustion gas supervisor (14).
6. a kind of electric arc furnaces according to claim 5 strengthens scrap preheater, which is characterized in that on the combustion gas supervisor It is provided with flow control valve (12).
7. a kind of electric arc furnaces according to claim 2 strengthens scrap preheater, which is characterized in that the steel scrap conveying is logical Exhaust fume collecting hood (3) are provided on road.
8. a kind of electric arc furnaces according to claim 7 strengthens scrap preheater, which is characterized in that the steel scrap conveying is logical Road is connect with the exhaust fume collecting hood by movable sealer (3b).
9. a kind of electric arc furnaces according to claim 1 strengthens scrap preheater, which is characterized in that positioned at electric arc furnaces end The end of steel scrap transfer passage is provided with gas baffle (7).
10. a kind of electric arc furnaces according to claim 1 strengthens scrap preheater, which is characterized in that further include for examining Survey the temperature-detecting device (8) of steel scrap temperature.
CN201910446565.5A 2019-05-27 2019-05-27 A kind of electric arc furnaces reinforcing scrap preheater Pending CN110173976A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910446565.5A CN110173976A (en) 2019-05-27 2019-05-27 A kind of electric arc furnaces reinforcing scrap preheater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910446565.5A CN110173976A (en) 2019-05-27 2019-05-27 A kind of electric arc furnaces reinforcing scrap preheater

Publications (1)

Publication Number Publication Date
CN110173976A true CN110173976A (en) 2019-08-27

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Application Number Title Priority Date Filing Date
CN201910446565.5A Pending CN110173976A (en) 2019-05-27 2019-05-27 A kind of electric arc furnaces reinforcing scrap preheater

Country Status (1)

Country Link
CN (1) CN110173976A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110736354A (en) * 2019-10-17 2020-01-31 广西钦州恒星锰业有限责任公司 Automatic furnace burden settlement heater

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110736354A (en) * 2019-10-17 2020-01-31 广西钦州恒星锰业有限责任公司 Automatic furnace burden settlement heater

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