CN204281779U - Scrap steel making equipment - Google Patents
Scrap steel making equipment Download PDFInfo
- Publication number
- CN204281779U CN204281779U CN201420791192.8U CN201420791192U CN204281779U CN 204281779 U CN204281779 U CN 204281779U CN 201420791192 U CN201420791192 U CN 201420791192U CN 204281779 U CN204281779 U CN 204281779U
- Authority
- CN
- China
- Prior art keywords
- steel scrap
- preheating section
- preheating
- steel
- arc furnace
- 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.)
- Withdrawn - After Issue
Links
- 238000009628 steelmaking Methods 0.000 title claims abstract description 26
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 103
- 239000010959 steel Substances 0.000 claims abstract description 103
- 238000010891 electric arc Methods 0.000 claims abstract description 36
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 13
- 229910052760 oxygen Inorganic materials 0.000 claims description 13
- 239000001301 oxygen Substances 0.000 claims description 13
- 238000002485 combustion reaction Methods 0.000 claims description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 18
- 239000003546 flue gas Substances 0.000 abstract description 18
- 230000000694 effects Effects 0.000 abstract description 9
- 238000003723 Smelting Methods 0.000 abstract description 6
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 125000004122 cyclic group Chemical group 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 239000000126 substance Substances 0.000 description 6
- 239000002912 waste gas Substances 0.000 description 5
- 241001062472 Stokellia anisodon Species 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000005728 strengthening Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000003517 fume Substances 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000009845 electric arc furnace steelmaking Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 241001417490 Sillaginidae Species 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Furnace Details (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The utility model provides a steel scrap steelmaking equipment, steel scrap steelmaking equipment includes: the horizontal auxiliary preheating section is arranged along the horizontal direction; the vertical main preheating section is arranged along the vertical direction and connected with the horizontal auxiliary preheating section; the inner cavity of the vertical main preheating section is a hollow cavity; an electric arc furnace connected to the vertical primary preheating section. The utility model discloses can realize the cyclic reuse of electric arc furnace high temperature flue gas, the physics of make full use of electric arc furnace flue gas is hot and the chemistry is hot, preheats the scrap steel twice, improves and preheats efficiency, can reduce equipment fault rate simultaneously, realizes that full scrap steel preheats, and ton steel practices thrift the power consumption about 120kWh/t, can realize flat molten bath smelting noise reduction, reduces the bell and opens and the flue gas discharges, reaches energy-conserving, the smelting effect of environmental protection.
Description
Technical field
The utility model relates to electric-arc furnace steelmaking field, is specifically related to the steel scrap steelmaking equipment for a kind of electric-arc furnace steelmaking.
Background technology
Electric arc furnace produces a large amount of high-temperature flue gas in steelmaking process, temperature is about 1000 ~ 1400 DEG C, containing a large amount of sensible heats and chemical energy, especially during oxygen blast strengthening smelting oxidation period, exhaust gas volumn is maximum, this part energy of abundant recycling carrys out preheating scrap furnace charge, significantly can reduce power consumption, increase economic efficiency.
Scrap steel preheating technology is an important electric arc furnace strengthening smelting technology.When carrying out preheating to steel scrap, heat smoke is by steel scrap stock column, heat is passed to steel scrap, because heat exchange makes steel scrap temperature raise, a large amount of dust simultaneously in flue gas are also filtered and return second stage employ in electric arc furnace with steel scrap, not only increase the recovery rate of steel, also mitigate the dedusting burden of flare system.In addition, due to waste gas, to leave the temperature after preheater lower, and heat smoke also has to scrap steel preheating benefits such as shortening water-cooled smoke pipe length.
Electric arc furnace scrap steel preheating mode conventional at present has vertical shaft electric arc furnace.Vertical shaft electric arc furnace is due to the reverse vertical heat transfer of steel scrap and waste gas, and pre-heat effect is better, and energy-saving effect is obvious, but is provided with finger valve bottom vertical shaft electric arc furnace and holds steel scrap, and easily smashed by steel scrap at when filling with substance, easily get stuck, therefore failure rate is higher simultaneously.
In sum, in prior art, there is following problem: be provided with finger valve bottom vertical shaft electric arc furnace and hold steel scrap, easily smashed by steel scrap at when filling with substance, failure rate is higher.
Utility model content
The utility model provides a kind of steel scrap steelmaking equipment, to solve the problem that vertical shaft electric arc furnace is easily smashed by steel scrap at when filling with substance, failure rate is higher.
For this reason, the utility model proposes a kind of steel scrap steelmaking equipment, described steel scrap steelmaking equipment comprises:
The auxiliary preheating section of level, is arranged in the horizontal direction;
Vertical main preheating section, vertically arranges and connects the auxiliary preheating section of described level; The inner chamber of described vertical main preheating section is the cavity of hollow;
Electric arc furnace, connects described vertical main preheating section.
Further, the auxiliary preheating section of described level comprises: the charge section be connected and preheating chamber, and described preheating chamber connects described vertical main preheating section, in described preheating chamber, steel scrap carries out a preheating, utilizes electric arc furnace waste gas to carry out secondary preheating to the steel scrap after a preheating in vertical main preheating section.
Further, the auxiliary preheating section of described level also comprises: be arranged on the travelling belt bottom described charge section and preheating chamber.
Further, described steel scrap steelmaking equipment also comprises: for the oxygen jet of secondary combustion, is arranged on vertical main preheating section.
Further, described steel scrap steelmaking equipment also comprises: oxygen rifle, is arranged on the furnace wall of electric arc furnace.
In the utility model, in vertical main preheating section, inner chamber is the cavity of hollow, finger valve is not provided with in vertical main preheating section, bottom steel scrap holds top steel scrap, and along with the continuous fusing of bottom steel scrap, top steel scrap slowly declines continuously, solves vertical shaft electric arc furnace easily by the problem that steel scrap smashes, decreases equipment failure rate.
In vertical main preheating section, bottom steel scrap directly contacts with molten bath, improve the heat transfer efficiency between molten iron and steel scrap, because steel scrap does not directly contact with electrode, smelting process noise can be reduced, reduce the fluctuation in molten bath, realize flat molten bath to smelt, oxygen rifle is set on the electric arc furnace furnace wall in this region simultaneously, for strengthening melting bath stirring, the heat transfer between promotion molten iron and steel scrap and the fusing of steel scrap.In melting process, rely on bottom steel scrap to hold top steel scrap, along with the continuous fusing of bottom steel scrap, top steel scrap slowly declines continuously.
Adopt the utility model can overcome the shortcoming that Consteel electric furnace pre-heat effect is poor and vertical shaft arc furnace equipment failure rate is high, the recirculation realizing electric arc furnace high-temperature flue gas utilizes, make full use of physical thermal and the chemical heat of electric arc furnace flue gas, twice preheating is carried out to steel scrap, improve pre-thermo-efficiency, equipment failure rate can be reduced simultaneously, realize full scrap steel preheating, ton steel is saved power consumption and is about 120kWh/t, flat molten bath can be realized smelt reduction noise, reduce bell unlatching and fume emission, reach the metallurgical effect of energy-saving and environmental protection.
Accompanying drawing explanation
Fig. 1 is the structural representation of steel scrap steelmaking equipment of the present utility model.
Drawing reference numeral illustrates:
1. the auxiliary preheating section of level, 2. vertical main preheating section, 3. electric arc furnace, 4. charge section, 5. feed travelling belt, 6. preheating chamber, 7. preheating chamber travelling belt, 8. oxygen jet, 9. oxygen rifle
Embodiment
In order to there be understanding clearly to technical characteristic of the present utility model, object and effect, now contrast accompanying drawing and the utility model is described.
As shown in Figure 1, steel scrap steelmaking equipment of the present utility model comprises:
The auxiliary preheating section 1 of level, is arranged in the horizontal direction;
Vertical main preheating section 2, vertically arranges and is connected to the auxiliary preheating section of described level in downstream; The inner chamber of described vertical main preheating section is the cavity of hollow, is not provided with finger valve in vertical main preheating section 2; In vertical main preheating section, the electric arc furnace flue gas up to 1200-1400 DEG C and steel scrap carry out vertical reverse heat transfer;
Electric arc furnace 3, is connected to described vertical main preheating section 2 downstream.
In vertical main preheating section 2, inner chamber is the cavity of hollow, finger valve is not provided with in vertical main preheating section, bottom steel scrap holds top steel scrap, and along with the continuous fusing of bottom steel scrap, top steel scrap slowly declines continuously, solves vertical shaft electric arc furnace easily by the problem that steel scrap smashes, decreases equipment failure rate.
Further, in described vertical main preheating section, bottom steel scrap holds top steel scrap, and along with the continuous fusing of bottom steel scrap, top steel scrap slowly declines continuously.In vertical main preheating section, bottom steel scrap directly contacts with molten bath, improves the heat transfer efficiency between molten iron and steel scrap, because steel scrap does not directly contact with electrode, can reduce smelting process noise, reduces the fluctuation in molten bath, realizes flat molten bath and smelts.
Further, the auxiliary preheating section 1 of described level comprises: the charge section 4 be connected and preheating chamber 6, described preheating chamber 6 connects described vertical main preheating section, in described preheating chamber 6, steel scrap carries out a preheating, utilizes electric arc furnace waste gas to carry out secondary preheating to the steel scrap after a preheating in vertical main preheating section.Through twice preheating, the waste heat preheating scrap in electric arc furnace flue gas can be made full use of, reach the metallurgical effect of energy-saving and environmental protection.
Further, in steel-making course of the electric arc furnace, utilize low-temperature flue gas can by cold scrap steel preheating to more than 200 DEG C at the auxiliary preheating section of level, rely on the heat of high-temperature flue gas and secondary combustion by more than scrap steel preheating to 600 DEG C, full scrap steel preheating can be realized at vertical main preheating section.Like this, ton steel is saved power consumption and is about 120kWh/t, can realize flat molten bath and smelt reduction noise, reduces bell unlatching and fume emission.
Further, the auxiliary preheating section of described level also comprises: be arranged on the travelling belt bottom described charge section and preheating chamber.The bottom of charge section 4 is provided with travelling belt 5, travelling belt 7 is provided with bottom preheating chamber, the cold steel scrap loaded is sent in preheating chamber 6 and is carried out a preheating by travelling belt 5, and the steel scrap after preheating chamber 6 preheatings continues through travelling belt 7 and sends into vertical main preheating section 2 and carry out secondary preheating; By travelling belt can be stable realize a preheating and secondary preheating.Further, described travelling belt is the adiabatic travelling belt of energy speed governing, to realize heat-resisting function and the molten bath situation conveying steel scrap according to electric arc furnace.
Further, described steel scrap steelmaking equipment also comprises: for the oxygen jet 8 of secondary combustion, is arranged on vertical main preheating section.The oxygen be blown into by oxygen jet 8 and CO reaction produce CO
2, release a large amount of chemical heat, the waste gas after burning is used for preheating scrap, increases the temperature head of steel scrap and flue gas, improves scrap steel preheating effect, relies on the heat of high-temperature flue gas and secondary combustion by scrap steel preheating to 650-700 DEG C.
Further, described steel scrap steelmaking equipment also comprises: oxygen rifle 9, is arranged on the furnace wall of electric arc furnace 3.Electric arc furnace furnace wall is arranged oxygen rifle, for strengthening melting bath stirring, the heat transfer between promotion molten iron and steel scrap and the fusing of steel scrap.
Working process of the present utility model is:
In steelmaking process, utilize magnet suspender or steel scrap basket that cold steel scrap is added charge section continuously, then utilize the adiabatic travelling belt of adjustable speed to be sent constantly into by steel scrap in the preheating chamber of the auxiliary preheating section of level and carry out preheating.Electric arc furnace flue gas in preheating chamber is about 500-700 DEG C in temperature after vertical main preheating section, heat exchange is carried out with the steel scrap in horizontal preheating chamber, electric furnace flue gas and steel scrap carry out the reverse heat transfer of level, after a preheating chamber preheating, the temperature of steel scrap will be increased to more than 200 DEG C, and such as steel scrap temperature rises to about 250 DEG C.
Steel scrap after a preheating sends into vertical main preheating section through preheating chamber travelling belt, in vertical main preheating section, vertical reverse heat transfer is carried out up to 1000-1400 DEG C of electric arc furnace flue gas and steel scrap, steel scrap fully contacts with high-temperature flue gas, add heat transfer area, heat transfer efficiency is high, relies on the heat of high-temperature flue gas and secondary combustion by more than scrap steel preheating to 600 DEG C, be such as 650-700 DEG C, the steel scrap after preheating adds continuously in electric arc furnace and carries out melting.Molten bath contact in steel scrap after preheating and electric arc furnace 3, along with the continuous fusing of vertical main preheating section bottom steel scrap, top steel scrap adds gradually in electric arc furnace and carries out melting, realizes full scrap steel preheating, saves power consumption and be about 120kWh/t.
In working process of the present utility model, because steel scrap is direct and electrode contact, flat molten bath can be realized and smelt reduction noise, reduce bell unlatching and fume emission, reach the metallurgical effect of energy-saving and environmental protection.
The foregoing is only the schematic embodiment of the utility model, and be not used to limit scope of the present utility model.For each integral part of the present utility model can mutually combine under the condition of not conflicting; any those skilled in the art; equivalent variations done under the prerequisite not departing from design of the present utility model and principle and amendment, all should belong to the scope of the utility model protection.
Claims (5)
1. a steel scrap steelmaking equipment, is characterized in that, described steel scrap steelmaking equipment comprises:
The auxiliary preheating section of level, is arranged in the horizontal direction;
Vertical main preheating section, vertically arranges and connects the auxiliary preheating section of described level; The inner chamber of described vertical main preheating section is the cavity of hollow;
Electric arc furnace, connects described vertical main preheating section.
2. steel scrap steelmaking equipment as claimed in claim 1, it is characterized in that, the auxiliary preheating section of described level comprises: the charge section be connected and preheating chamber, and described preheating chamber connects described vertical main preheating section.
3. steel scrap steelmaking equipment as claimed in claim 2, it is characterized in that, described steel scrap steelmaking equipment also comprises: be arranged on the travelling belt bottom described charge section and preheating chamber.
4. steel scrap steelmaking equipment as claimed in claim 1, it is characterized in that, described steel scrap steelmaking equipment also comprises: for the oxygen jet of secondary combustion, is arranged on vertical main preheating section.
5. steel scrap steelmaking equipment as claimed in claim 1, it is characterized in that, described steel scrap steelmaking equipment also comprises: oxygen rifle, is arranged on the furnace wall of electric arc furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420791192.8U CN204281779U (en) | 2014-12-12 | 2014-12-12 | Scrap steel making equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420791192.8U CN204281779U (en) | 2014-12-12 | 2014-12-12 | Scrap steel making equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204281779U true CN204281779U (en) | 2015-04-22 |
Family
ID=52864961
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420791192.8U Withdrawn - After Issue CN204281779U (en) | 2014-12-12 | 2014-12-12 | Scrap steel making equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204281779U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104531946A (en) * | 2014-12-12 | 2015-04-22 | 中冶京诚工程技术有限公司 | Scrap steel making equipment |
| CN115679035A (en) * | 2022-09-07 | 2023-02-03 | 中冶长天国际工程有限责任公司 | Scrap steel preheating method and device based on hot charging direct reduced iron |
-
2014
- 2014-12-12 CN CN201420791192.8U patent/CN204281779U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104531946A (en) * | 2014-12-12 | 2015-04-22 | 中冶京诚工程技术有限公司 | Scrap steel making equipment |
| CN104531946B (en) * | 2014-12-12 | 2016-03-02 | 中冶京诚工程技术有限公司 | Scrap steel making equipment |
| CN115679035A (en) * | 2022-09-07 | 2023-02-03 | 中冶长天国际工程有限责任公司 | Scrap steel preheating method and device based on hot charging direct reduced iron |
| CN115679035B (en) * | 2022-09-07 | 2023-12-29 | 中冶长天国际工程有限责任公司 | Scrap steel preheating method and device based on hot charging direct reduced iron |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150422 Effective date of abandoning: 20160302 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |