CN202576475U - Energy-saving electric furnace - Google Patents
Energy-saving electric furnace Download PDFInfo
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- CN202576475U CN202576475U CN2012202195725U CN201220219572U CN202576475U CN 202576475 U CN202576475 U CN 202576475U CN 2012202195725 U CN2012202195725 U CN 2012202195725U CN 201220219572 U CN201220219572 U CN 201220219572U CN 202576475 U CN202576475 U CN 202576475U
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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
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Abstract
The utility model discloses an energy-saving electric furnace which comprises a furnace body, an electron-beam technique (EBT) area and a furnace top charging system, wherein the furnace top charging system comprises a storage bin used for placing furnace charge, and a weighing belt used for weighing the furnace charge; the circumference of the inner w all of the furnace body is sequentially provided with water-cooling boards 1 to 10 from the position of a door frame, wherein the water-cooling boards 1, 2, 3, 5, 6, 7 and 9 are vertically arranged along the vertical direction of the furnace body; the water-cooling boards 4, 8 and 0 are arranged towards the inner side of the furnace body in a convex way; and three praxair carbon jet oxygen guns are respectively arranged at the water-cooling boards 4, 8 and 10. The energy-saving electric furnace improves hot metal ratio, lightens splashing, shortens smelting time of the electric furnace, saves energy and reduces cost.
Description
Technical field
The utility model belongs to field of metallurgy, relates to a kind of electric furnace, specifically a kind of energy-saving electric furnace that can reduce power consumption, consumption of electrode.
Background technology
At present, Electric furnace steel making factory produces the burden structure that adopts 60-40% steel scrap, 40-60% molten iron; Through mole oxygen rifle and three furnace wall fluidic oxygen guns in stove oxygen supply the time; Switch in the electric furnace stove through power supply system and to smelt; Melting electric consumption is up to 225kwh/t, and consumption of electrode is up to 1.2kg/t, so the electric furnace production cost is much higher than the converter smelting cost.
In the conventional ultra-high power electric arc furnace type of furnace, open bell and directly in stove, add steel scrap through the material basket.Fig. 1 is an oxygen rifle installation site synoptic diagram in the prior art.Among the figure; Body of heater 51, EBT zone 52; On body of heater 51 inwall circumference, begin by doorframe 6 positions; Be provided with 1# cooled plate 61,2# cooled plate 62,3# cooled plate 63,4# cooled plate 64,5# cooled plate 65,6# cooled plate 66,7# cooled plate 67,8# cooled plate 68,9# cooled plate 69 and 10# cooled plate 60 successively, mole rifle 7 is arranged on 10# cooled plate 60 places, and 1# oxygen rifle 71,2# oxygen rifle 72,3# oxygen rifle 73 are separately positioned on 3# cooled plate 63,4# cooled plate 64 and 8# cooled plate 68 places.Electric furnace is compared with converter steelmaking; Main gap is lower at the hot metal ratio that electric furnace uses, and adopts electric energy heating molten steel, and electrosmelting power consumption and electrode cost are up to 150 yuan/ton; Therefore the electric furnace thinking of falling this improves into the stove hot metal ratio exactly; Utilize the element such as physics heat and the carbon in the molten iron, silicon of molten iron and the chemical heat of oxygen reaction to heat molten steel, completely abolishing energising to heat up, reduce power consumption and consumption of electrode.
In existing electric cooker structure, because the electric furnace molten bath is more shallow, after hot metal ratio increases; Three the Praxair fluidic oxygen guns in original furnace wall are big with mole rifle oxygen supply intensity, and after a large amount of molten iron added, reaction between carbon and oxygen was violent in the stove; Splash is serious; Bell and stove are serious along steel bonding, and cleaning bell and stove are long along the time, are unfavorable for the raising of electrosmelting rhythm on the contrary.Therefore, must undergo technological transformation, alleviate splash, shorten the electrosmelting time, the purpose of energy saving and cost lowering thereby reach to furnace equipment.
Summary of the invention
The purpose of the utility model provides a kind of energy-saving electric furnace, and this electric furnace can improve hot metal ratio, alleviates splash, shortens the electrosmelting time, energy saving and cost lowering.
The purpose of the utility model realizes through following technical scheme:
A kind of energy-saving electric furnace; Comprise body of heater, EBT zone and top filling system; It is characterized in that: said top filling system comprises and is used for placing the feed bin of furnace charge and the belt of weighing that furnace charge is weighed; On the inboard wall of furnace body circumference, begin by the doorframe position; Be provided with 1# cooled plate, 2# cooled plate, 3# cooled plate, 4# cooled plate, 5# cooled plate, 6# cooled plate, 7# cooled plate, 8# cooled plate, 9# cooled plate and 10# cooled plate successively, wherein, 1# cooled plate, 2# cooled plate, 3# cooled plate, 5# cooled plate, 6# cooled plate, 7# cooled plate, 9# cooled plate are vertically arranged along the body of heater vertical direction; 4# cooled plate, 8# cooled plate and 10# cooled plate are to the furnace body inside projection arrangements, and three oxygen rifles are installed in 4# cooled plate, 8# cooled plate and 10# cooled plate place respectively.
In the utility model, the height of said convexity is 550-600mm, and protruding width is 800-1000mm.Three Praxair carbon fluidic oxygen guns be installed in the 4# cooled plate the 600mm position, be installed in the 500mm position of 8# cooled plate, be installed in the 500mm position of 10# cooled plate.The utility model is provided with the little bell of water-cooled on body of heater.
The utility model has carried out the exploitation transformation to the device systems of electric furnace, has removed electric-pole horizontal arm, the cancellation electrode.Feeding system has increased the belt of weighing, and has increased feed bin, realizes lime, Wingdale and the continuous rapid loading of returning mine, and satisfies the smelting demand of the high hot metal ratio of electric furnace.Cooled plate to Praxair fluidic oxygen gun installed position is transformed, and changes the cooled plate advanced to the stove convex into by original vertical water cold drawing, a cancellation mole rifle, has adjusted the installation site and the mounting height of three Praxair carbon fluidic oxygen guns; Shortened and the molten steel face between distance; Both guaranteed oxygen supply intensity, reduced splash in the stove, also reduced erosion the anti-material of furnace lining; Help stable the raising and smelt rhythm, improve electric furnace furnace life.Electricity covers the little bell of anti-material and transform the little bell of water-cooled as, eliminates because of the short influence to producing of the port of anti-material lid life-span;
Improve in the utility model electric furnace fire door and EBT zone, has increased the heat size ratio, and electric furnace stays the steel amount can reach the 20-30 ton, helps electric furnace quick slagging in early stage, improves and smelt rhythm.Can be optimized the resistant material of electric furnace brick-building art simultaneously, daubing material thickness and furnace wall brick reduced thickness have further enlarged heat size, stay the steel amount further to increase.
When the utility model was made steel, electric furnace adopted the burden structure of 85-95% molten iron, 5-15% steel scrap, after furnace lid is opened; Steel scrap utilizes and converts the iron device through material basket disposable adding, in electric furnace, is blended into molten iron according to blowing situation in the stove continuously with the speed of 2.0-4.0 ton/min; In stove, inject Oxygen Flow through three furnace wall Praxair carbon-oxygen guns that are installed in the furnace wall simultaneously, and regulate oxygen supply intensity, guarantee that carbon content is stabilized in 0.40-0.80% in the stove according to blowing situation in the stove; Oxygen blast simultaneously adds lime in the electric furnace, returns mine, Wingdale, carries out slag making and regulates the interior liquid steel temperature of stove, and liquid steel temperature is controlled in 1500 ℃-1560 ℃ the scope in the converting process electric furnace; Guarantee that reaction between carbon and oxygen is stable in the stove; Slag fluidity is good, and the dephosphorization difficulty is little, and splash is few.Eaf tapping point control liquid steel temperature is at 1600 ℃-1650 ℃.Solved serious, the dephosphorization problem of difficult of electric furnace to converter production splash.
Description of drawings
Fig. 1 is an oxygen rifle installation site synoptic diagram in the prior art.
Fig. 2 is an oxygen rifle installation site synoptic diagram in the utility model.
The vertical component front view of the cooled plate of oxygen rifle is installed in Fig. 3-1 the utility model.
The vertical component vertical view of the cooled plate of oxygen rifle is installed in Fig. 3-2 the utility model.
The convex part rear view of the cooled plate of oxygen rifle is installed in Fig. 3-3 the utility model.
Vertical view in Fig. 3-4 the utility model after the cooled plate assembling of installation oxygen rifle.
Side-view in Fig. 3-5 the utility model after the cooled plate assembling of installation oxygen rifle.
Embodiment
The described energy-saving electric furnace of a kind of the utility model; Comprise body of heater 1, EBT zone 2 and top filling system; The top filling system comprises and is used for placing the feed bin of furnace charge and the belt of weighing that furnace charge is weighed; On body of heater 1 inwall circumference, begin by the doorframe position; Be provided with 1# cooled plate 11,2# cooled plate 12,3# cooled plate 13,4# cooled plate 14,5# cooled plate 15,6# cooled plate 16,7# cooled plate 17,8# cooled plate 18,9# cooled plate 19 and 10# cooled plate 10 successively; Wherein, 1# cooled plate, 2# cooled plate, 3# cooled plate, 5# cooled plate, 6# cooled plate, 7# cooled plate, 9# cooled plate are vertically arranged along body of heater 1 vertical direction, are the vertical water cold drawing; 4# cooled plate, 8# cooled plate and 10# cooled plate are to the furnace body inside projection arrangements, and three Praxair carbon fluidic oxygen guns are installed in 4# cooled plate, 8# cooled plate and 10# cooled plate place respectively.Fig. 2 is an oxygen rifle installation site synoptic diagram in the utility model.
Fig. 3-the 1st installs the vertical component front view of the cooled plate of oxygen rifle in the utility model.Fig. 3-the 2nd installs the vertical component vertical view of the cooled plate of oxygen rifle in the utility model.Fig. 3-the 3rd installs the convex part rear view of the cooled plate of oxygen rifle in the utility model.Fig. 3-the 4th, the vertical view in the utility model after the cooled plate assembling of installation oxygen rifle.Fig. 3-the 5th, the side-view in the utility model after the cooled plate assembling of installation oxygen rifle.Protruding height is 550-600mm, and protruding width is 800-1000mm.Praxair carbon fluidic oxygen gun be installed in the 4# cooled plate the 600mm position, be installed in the 500mm position of 8# cooled plate, be installed in the 500mm position of 10# cooled plate.On body of heater, be provided with the little bell of water-cooled, substitute the little bell of original anti-material.
During use, molten iron is packed into higher than general electric furnace factory, reaches 85-95%; Carbon total amount in the molten steel in the stove is higher, and it is excessive to convert iron excessive velocities or oxygen supply intensity, all is unfavorable for the stable of interior carbon content of molten steel of stove and temperature; Can't guarantee the steady of the interior reaction between carbon and oxygen of stove, be prone to cause splash in the stove.Therefore controlling and converting iron speed is 2.0-4.0 ton/min, and converts iron speed and oxygen supply intensity according to reaction between carbon and oxygen situation timely adjustment in the stove.
Stay the steel amount to increase to the 20-30 ton in the stove; Help electric furnace blowing quick slagging in early stage, improved the dephosphorization efficient in electrosmelting early stage, and through in stove, add Wingdale in good time; Liquid steel temperature guarantees the electric furnace dephosphorization effect in blowing later stage at 1500 ℃-1560 ℃ in the control stove.
For satisfying the oxygen supply intensity of electric converter smelting requirement, reduce the splash in the electric furnace converting process simultaneously, the furnace wall cooled plate is transformed, cancelled the mole rifle, adjusted the installation site and the height of three the Praxair carbon-oxygen guns in furnace wall.
Adopt the utility model, ton steel cost descends more than 225 yuan/ton, has reduced operator and serviceman's labour intensity, and hydrogen, nitrogen content and Cr, Ni, Cu residual deleterious element all obviously descend in the steel, have improved steel quality.
1, the main skill of electric furnace is fallen this through index
Electric furnace leading indicators such as melting electric consumption, consumption of electrode, carbon dust, lime decline to a great extent, and cost descends more.Compare with 2011 annual indexs; March, melting electric consumption reduced about 225kwh/t steel, and auxiliary power consumption reduces about 13.6kwh/t, and consumption of electrode reduces the 1.24kg/t steel; Carbon dust carbon dust consumption decline 9.89kg/t steel, furnace life has been brought up to more than 640 stoves from former average 500 stoves especially.With 2011 year-on-years, 157 yuan of/ton steel of electric furnace leading indicator cost decline.
2, this falls in the output raising
Because it is more that electric converter cost descends, electric furnace is able to continuous production, and production capacity improves very fast, and 3 month to dates produce 80389 tons of steel, and average daily output reaches 2593 tons, and production capacity promotes about 200 tons/day, is electric furnace best level in history.The raising of output has reduced fixed costs such as auxiliary power consumption, machine Material Cost, the cost of anti-material the, depreciation and wage, compares with 2011 annual indexs, and auxiliary power consumption, machine Material Cost, the cost of anti-material the, depreciation and five accumulative totals of wage are fallen and originally reached 75 yuan/ton.
3, alleviated labour intensity
After the electric furnace to converter transformation; The electric furnace splash obviously reduces, and the frequency that the operative employee purges bell and the stove last steel bonding in edge significantly reduces, in addition owing to cancelled stokehold mole oxygen rifle; Rise fall of electrodes system and power supply system, flushing and casting workman and maintenance mans' labour intensity and maintenance load all descend to some extent.
4, helping quality improves
Because electric furnace to converter production is not supplied power and the increase of hot metal ratio, hydrogen, nitrogen content and Cr, Ni, Cu residual deleterious element all obviously descend in the steel, have improved the purity of molten steel, help the exploitation and the production of excellent special steel, help the raising of quality.
Claims (4)
1. energy-saving electric furnace comprises body of heater (1), EBT zone (2) and top filling system, it is characterized in that: said top filling system comprises and is used for placing the feed bin of furnace charge and the belt of weighing that furnace charge is weighed; On body of heater (1) inwall circumference, begin by doorframe (3) position; Be provided with 1# cooled plate (11), 2# cooled plate (12), 3# cooled plate (13), 4# cooled plate (14), 5# cooled plate (15), 6# cooled plate (16), 7# cooled plate (17), 8# cooled plate (18), 9# cooled plate (19) and 10# cooled plate (10) successively; Wherein, 1# cooled plate (11), 2# cooled plate (12), 3# cooled plate (13), 5# cooled plate (15), 6# cooled plate (16), 7# cooled plate (17), 9# cooled plate (19) are vertically arranged along body of heater (1) vertical direction; 4# cooled plate (14), 8# cooled plate (18) and 10# cooled plate (10) side direction projection arrangements in body of heater (1); Three oxygen rifles are installed in 4# cooled plate (14), 8# cooled plate (18) and 10# cooled plate (10) respectively and locate.
2. energy-saving electric furnace according to claim 1 is characterized in that: the height of said convexity is 550-600mm, and protruding width is 800-1000mm.
3. energy-saving electric furnace according to claim 1; It is characterized in that: three oxygen rifles are Praxair carbon fluidic oxygen gun; Wherein 1# Praxair carbon fluidic oxygen gun (21) is installed in the 500mm position of 10# cooled plate (10), the 600mm position that 2# Praxair carbon fluidic oxygen gun (22) is installed in 4# cooled plate (14), and 3# Praxair carbon fluidic oxygen gun (23) is installed in the 500mm position of 8# cooled plate (18).
4. energy-saving electric furnace according to claim 1 is characterized in that: on body of heater, be provided with the little bell of water-cooled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202195725U CN202576475U (en) | 2012-05-16 | 2012-05-16 | Energy-saving electric furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202195725U CN202576475U (en) | 2012-05-16 | 2012-05-16 | Energy-saving electric furnace |
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| CN202576475U true CN202576475U (en) | 2012-12-05 |
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| CN2012202195725U Withdrawn - After Issue CN202576475U (en) | 2012-05-16 | 2012-05-16 | Energy-saving electric furnace |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102634635A (en) * | 2012-05-16 | 2012-08-15 | 中天钢铁集团有限公司 | Energy-saving electric furnace |
| CN105331768A (en) * | 2015-12-08 | 2016-02-17 | 马鞍山钢铁股份有限公司 | Method for prolonging service life of water-cooled furnace wall of electric furnace |
| CN114807504A (en) * | 2022-05-13 | 2022-07-29 | 江苏省沙钢钢铁研究院有限公司 | Arrangement structure of oxygen lance of eccentric bottom electric furnace |
-
2012
- 2012-05-16 CN CN2012202195725U patent/CN202576475U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102634635A (en) * | 2012-05-16 | 2012-08-15 | 中天钢铁集团有限公司 | Energy-saving electric furnace |
| CN102634635B (en) * | 2012-05-16 | 2013-10-16 | 中天钢铁集团有限公司 | Energy-saving electric furnace |
| CN105331768A (en) * | 2015-12-08 | 2016-02-17 | 马鞍山钢铁股份有限公司 | Method for prolonging service life of water-cooled furnace wall of electric furnace |
| CN114807504A (en) * | 2022-05-13 | 2022-07-29 | 江苏省沙钢钢铁研究院有限公司 | Arrangement structure of oxygen lance of eccentric bottom electric furnace |
| CN114807504B (en) * | 2022-05-13 | 2024-05-14 | 江苏省沙钢钢铁研究院有限公司 | Oxygen gun arrangement structure of eccentric bottom electric furnace |
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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 |
Granted publication date: 20121205 Effective date of abandoning: 20131016 |
|
| RGAV | Abandon patent right to avoid regrant |