CN101269984A - Method for shortening sintering time of electric furnace refractory material during new furnace starting - Google Patents
Method for shortening sintering time of electric furnace refractory material during new furnace starting Download PDFInfo
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- CN101269984A CN101269984A CNA2008100251894A CN200810025189A CN101269984A CN 101269984 A CN101269984 A CN 101269984A CN A2008100251894 A CNA2008100251894 A CN A2008100251894A CN 200810025189 A CN200810025189 A CN 200810025189A CN 101269984 A CN101269984 A CN 101269984A
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- furnace
- electric furnace
- opening new
- sintering time
- electric
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- 238000005245 sintering Methods 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000004904 shortening Methods 0.000 title claims abstract description 13
- 239000011819 refractory material Substances 0.000 title abstract 5
- 239000000463 material Substances 0.000 claims description 39
- 238000004519 manufacturing process Methods 0.000 claims description 20
- 239000000571 coke Substances 0.000 claims description 11
- 229910052799 carbon Inorganic materials 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- 239000002008 calcined petroleum coke Substances 0.000 claims description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 3
- 239000005864 Sulphur Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 10
- 238000009628 steelmaking Methods 0.000 abstract description 7
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 description 28
- 239000010959 steel Substances 0.000 description 28
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 16
- 239000002184 metal Substances 0.000 description 13
- 229910052751 metal Inorganic materials 0.000 description 13
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 10
- 229910052760 oxygen Inorganic materials 0.000 description 10
- 239000001301 oxygen Substances 0.000 description 10
- 229910052742 iron Inorganic materials 0.000 description 8
- 238000003723 Smelting Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 230000003245 working effect Effects 0.000 description 4
- 241001062472 Stokellia anisodon Species 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000005261 decarburization Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000002006 petroleum coke Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
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- Vertical, Hearth, Or Arc Furnaces (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a method for shortening the sintering time of refractory materials of an electric furnace during the process of starting a new furnace. The method can shorten the sintering time of the refractory material of the electric furnace when the furnace is started to be new, save the energy consumption of the electric furnace, improve the steelmaking yield of the electric furnace, ensure good sintering effect of the refractory material of the furnace bottom and prolong the service life of the refractory material of the furnace bottom.
Description
Technical field
The invention belongs to the electrosmelting industry field, be specifically related to a kind of method of resistant material of electric furnace sintering time when shortening opening new furnace.
Background technology
The production of electric furnace opening new furnace first stove is to safeguard most important link of bottom refractory life-span, and it is main that the first stove blow-on material should be selected good conductivity, small light and thin material of fine quality, 10% left and right sides pig iron, the not ingredients principle of hot metal charge.Direct current furnace is owing to power by the electrode or the conduction furnace bottom of furnace bottom, and the sintering of the anti-material of furnace bottom is more important, and the sintering effect quality of the anti-material of furnace bottom directly has influence on the work-ing life of whole resistant material of electric furnace.
Traditional opening new furnace should have 3.5-4.5 hour time from beginning to smelt to tapping, to guarantee the adequate moisture time of liberation being arranged in a bottom refractory and surface of good sintered layer is arranged, and prepare burden according to 4 basket steel scraps usually, behind the molten steel molten bath of the molten clear formation certain depth of the second basket steel scrap, whenever added behind the basket steel scrap basic need baker 40-60 minute, utilize high-temperature molten steel with anti-material sintering progressively, and make the moisture in the anti-material fully overflow.Because it is slower that the anti-material sintering process of furnace bottom is carried out, for make that sintering carries out fully, simultaneously also in order to make furnace shell cooling stave and big bell evenly spatter slag crust, prevent that ironware from beating arc and produce and leak, galvanization is often used the low gear bit manipulation; And the influence of the oxygen decarburization that uses big flow during for fear of opening new furnace during to the resistant material of electric furnace sintering, general first stove is forbidden hot metal charge, all furnace charges molten clear after, can carry out low intensive oxygen blast operation.
Yet for a long time baker and can not hot metal charge obviously will increase the conduction time of electric furnace, improve the loss for hearth electrode, increase production costs such as melting electric consumption, be unfavorable for saving energy and reduce the cost of electric furnace; And reduction electric furnace output, therefore and the production to supporting blast furnace causes very big influence to a certain extent, seeks a kind ofly can either shorten the furnace bottom sintering method of anti-material that the resistant material of electric furnace sintering time can guarantee the good furnace bottom sintering effect of anti-the material again become the technical problem that present electrosmelting industry needs urgent solution when opening new furnace.
Summary of the invention
The present invention seeks to: a kind of method of resistant material of electric furnace sintering time when shortening opening new furnace is provided, resistant material of electric furnace sintering time in the time of can shortening opening new furnace is saved the electric furnace energy consumption, improves Electric furnace steel making output, guarantee the good furnace bottom sintering effect of anti-the material simultaneously, prolong the anti-material of furnace bottom work-ing life.
Technical scheme of the present invention is: a kind of method of resistant material of electric furnace sintering time when shortening opening new furnace, and before the production of opening new furnace first stove begins, even bedding one deck refinery coke carburelant on the ramming mass of having constructed on furnace bottom stove slope.
The refinery coke carburelant that adopts among the present invention is working methods such as the calcining petroleum coke purification acquisition by routine.The fixed carbon of this class calcined petroleum coke carburelant more than 98.5%, sulphur content below 0.5%, ash is below 0.5%, has high-carbon, low-sulfur, the characteristics of low ash.
The PetroChina Company Limited. of the present invention laying amount of burnt carburelant on furnace bottom stove slope is 120～280 kilograms/square metre, and further preferred laying amount is 140～240 kilograms/square metre, and further preferred laying amount is 160～200 kilograms/square metre.
Because among the present invention, when beginning to smelt, make the refinery coke carburelant bedding that is packed in bag on the good ramming mass of construction, with steel scrap with also there is not the agglomerating ramming mass to separate, can effectively prevent the loosening and displacement of ramming mass before not having sintering, guarantee the anti-material sintered shape on furnace bottom and stove slope, provide solid basis for improving the sintering effect of anti-the material; Hot metal charge provides condition during also for opening new furnace first stove, makes the oxygen decarburization of big flow to cause too much obstruction to the resistant material of electric furnace sintering.And smelting the later stage, the heat that mainly utilizes the reaction between carbon and oxygen of molten steel and refinery coke carburelant to produce quickens the sintering velocity of anti-material, to reach the purpose that shortens sintering time.
Advantage of the present invention is:
The inventive method has following advantage in the STEELMAKING PRODUCTION of opening new furnace first stove:
1) because the refinery coke carburelant can separate steel scrap, effectively prevent the loosening and displacement of ramming mass before not having sintering, guarantee the anti-material sintered shape on furnace bottom and stove slope, so guaranteed the good sintering effect of the anti-material in back, for having accomplished fluently solid basis the work-ing life that prolongs the anti-material of furnace bottom, hot metal charge provides condition during also for opening new furnace first stove.
2) since can be in the production of electric furnace opening new furnace first stove hot metal charge, and well-known, hot metal charge is brought a large amount of heat energy into, can shorten the electric furnace energising heating-up time, is convenient to oxygen blast as early as possible flux, and saves tap to tap time; And opening new furnace steel-making in the past need be made into 4 basket steel scraps, only need be made into 3 basket steel scraps now, needed 40-60 minute furnace drying time and steel scrap consumption thereof behind former adding the 4th basket steel scrap have been saved, can greatly reduce melting electric consumption, production time and raw materials cost, and the reduction of production cost helps to improve Electric furnace steel making output.
3) since can be in the production of electric furnace opening new furnace first stove hot metal charge, digested and supporting blast-melted of electric furnace, make the heat of molten iron be fully used, the heat-energy losses of avoiding electric furnace and blast furnace simultaneously is (in the traditional way opening new furnace production of not using the inventive method to carry out, to need molten iron cool to room temperature to add in the electric furnace again on the blast furnace with 1200 ℃, and electric furnace need be elevated to 1600 ℃ from room temperature with steel scrap, and the heat of molten iron is not fully used in this process).Can during opening new furnace, carry out simultaneously the production of the related support equipments of electric furnace such as blast furnace continuously, reduced because electric furnace more renews the influence that furnace lining is produced blast furnace, these influences mainly comprise to be avoided blast furnace staying (blast furnace stops to produce) or with pig-casting machine on the molten iron of blast furnace, causes waste; Higher economic value and suitability are arranged.
4) smelting the later stage; the heat that can utilize the reaction between carbon and oxygen of molten steel and refinery coke carburelant to produce quickens the sintering velocity of anti-material; shorten the resistant material of electric furnace sintering time; also accelerate simultaneously the fusing of steel scrap; therefore can further reduce electric furnace baker conduction time; reduce power consumption, help to protect hearth electrode, prolong the electric furnace life-span.The applicant is since in June, 2007 advance copy inventive method, and the sintering effect of electric furnace furnace bottom is good, does not use before this technology furnace life about 450 stoves, use the inventive method after, furnace life steadily improves, at present average furnace life reaches 504 stoves.And by successfully testing this inventive method, the furnace drying time 1-2 when on average shortening opening new furnace hour.
Embodiment
Embodiment: electric furnace factory of applicant Su Gang group, the electric furnace type of furnace of employing: 100DC EBT6.6/100, the following furnace shell internal diameter 6500mm of these 100 tons of electric furnaces, drain pan radius 7850mm, furnace shell capacity 115t; Make the calcined petroleum coke carburelant that is packed in bag: fixed carbon 〉=98.5%, sulphur≤0.5%, ash≤0.5%), 20 kilograms every bag refinery coke carburelant.
Before the production of opening new furnace first stove, earlier be ready to standby resistant material of electric furnace by normal furnace building process, then on the good furnace bottom stove slope of ramming, pack the above-mentioned packed calcined petroleum coke carburelant of even bedding, about laying depth average out to 30mm, the laying amount is substantially about 180 kilograms/square metre, and consumption is about 5 tons.
Be made into 3 basket steel scraps when opening new furnace, normally carry out hot metal charge, behind the molten steel molten bath of the molten clear formation certain depth of the second basket steel scrap, add the 3rd basket steel scrap, baker 40-60 minute, normal power-up intensification and oxygen blast were fluxed until tapping then.
The principle of the inventive method is, utilizes the refinery coke carburelant effectively with steel scrap with also there is not the agglomerating ramming mass to separate when opening new furnace first stove begins to smelt, and guarantees suitable furnace bottom and stove domatic shape, prevents the loosening and displacement of ramming mass before not having sintering; Smelting the heat energy that the later-stage utilization reaction between carbon and oxygen produces, quicken the anti-material of sintering, to reach good sintering effect.Have following advantage after the employing present embodiment method:
1) because the refinery coke carburelant can separate steel scrap, effectively prevent the loosening and displacement of ramming mass before not having sintering, guarantee the anti-material sintered shape on furnace bottom and stove slope, so guaranteed the good sintering effect of the anti-material in back, for having accomplished fluently solid basis the work-ing life that prolongs the anti-material of furnace bottom, hot metal charge provides condition during also for opening new furnace first stove.
2) owing to hot metal charge in the production of electric furnace opening new furnace first stove, and well-known, hot metal charge is brought a large amount of heat energy into, can shorten the electric furnace energising heating-up time, is convenient to oxygen blast as early as possible flux, and saves tap to tap time; And opening new furnace steel-making in the past need be made into 4 basket steel scraps, only need be made into 3 basket steel scraps now, needed 40-60 minute furnace drying time and steel scrap consumption thereof behind former adding the 4th basket steel scrap have been saved, can greatly reduce melting electric consumption, production time and raw materials cost, and the reduction of production cost helps to improve Electric furnace steel making output.The production time of electric furnace factory of applicant Su Gang group opening new furnace first stove shortened into about 2.5 hours.
3) owing to hot metal charge in the production of electric furnace opening new furnace first stove, digested and supporting blast-melted of electric furnace, make the heat of molten iron be fully used, the heat-energy losses of avoiding electric furnace and blast furnace simultaneously is (in the traditional way opening new furnace production of not using the inventive method to carry out, to need molten iron cool to room temperature to add in the electric furnace again on the blast furnace with 1200 ℃, and electric furnace need be elevated to 1600 ℃ from room temperature with steel scrap, and the heat of molten iron is not fully used in this process).Can during opening new furnace, carry out simultaneously the production of the related support equipments of electric furnace such as blast furnace continuously, reduced because electric furnace more renews the influence that furnace lining is produced blast furnace, these influences mainly comprise to be avoided blast furnace staying (blast furnace stops to produce) or with pig-casting machine on the molten iron of blast furnace, causes waste; Higher economic value and suitability are arranged.
4) smelting the later stage; the heat that can utilize the reaction between carbon and oxygen of molten steel and refinery coke carburelant to produce quickens the sintering velocity of anti-material; shorten the resistant material of electric furnace sintering time; also accelerate simultaneously the fusing of steel scrap; therefore can further reduce electric furnace baker conduction time; reduce power consumption, help to protect hearth electrode, prolong the electric furnace life-span.The applicant is since in June, 2007 advance copy inventive method, and the sintering effect of electric furnace furnace bottom is good, does not use before this technology furnace life about 450 stoves, use the inventive method after, furnace life steadily improves, at present average furnace life reaches 504 stoves.And by successfully testing this inventive method, the furnace drying time 1-2 when on average shortening opening new furnace hour.
Claims (4)
1. the method for the sintering time of resistant material of electric furnace when shortening opening new furnace is characterized in that before the production of opening new furnace first stove begins, even bedding one deck refinery coke carburelant on the ramming mass of having constructed on furnace bottom stove slope.
2. the method for resistant material of electric furnace sintering time during shortening opening new furnace according to claim 1, it is characterized in that selecting for use fixed carbon more than 98.5%, sulphur content below 0.5%, ash is at the calcined petroleum coke carburelant below 0.5%, and the laying amount is 120～280 kilograms/square metre.
3. the method for resistant material of electric furnace sintering time is characterized in that the laying amount is 140～240 kilograms/square metre during shortening opening new furnace according to claim 2.
4. the method for resistant material of electric furnace sintering time is characterized in that the laying amount is 160～200 kilograms/square metre during shortening opening new furnace according to claim 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100251894A CN101269984A (en) | 2008-04-25 | 2008-04-25 | Method for shortening sintering time of electric furnace refractory material during new furnace starting |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100251894A CN101269984A (en) | 2008-04-25 | 2008-04-25 | Method for shortening sintering time of electric furnace refractory material during new furnace starting |
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| Publication Number | Publication Date |
|---|---|
| CN101269984A true CN101269984A (en) | 2008-09-24 |
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| CNA2008100251894A Pending CN101269984A (en) | 2008-04-25 | 2008-04-25 | Method for shortening sintering time of electric furnace refractory material during new furnace starting |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102021269A (en) * | 2010-11-25 | 2011-04-20 | 攀钢集团钢铁钒钛股份有限公司 | First furnace smelting method for new electric arc furnace |
| CN102559994A (en) * | 2012-03-20 | 2012-07-11 | 江苏省沙钢钢铁研究院有限公司 | Method for baking electric furnace by molten iron |
| CN103031406A (en) * | 2012-02-10 | 2013-04-10 | 新疆八一钢铁股份有限公司 | Double-heat addition electric furnace lining baking process |
-
2008
- 2008-04-25 CN CNA2008100251894A patent/CN101269984A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102021269A (en) * | 2010-11-25 | 2011-04-20 | 攀钢集团钢铁钒钛股份有限公司 | First furnace smelting method for new electric arc furnace |
| CN102021269B (en) * | 2010-11-25 | 2013-10-30 | 攀钢集团钢铁钒钛股份有限公司 | First furnace smelting method for new electric arc furnace |
| CN103031406A (en) * | 2012-02-10 | 2013-04-10 | 新疆八一钢铁股份有限公司 | Double-heat addition electric furnace lining baking process |
| CN103031406B (en) * | 2012-02-10 | 2014-05-28 | 新疆八一钢铁股份有限公司 | Double-heat addition electric furnace lining baking process |
| CN102559994A (en) * | 2012-03-20 | 2012-07-11 | 江苏省沙钢钢铁研究院有限公司 | Method for baking electric furnace by molten iron |
| CN102559994B (en) * | 2012-03-20 | 2013-11-27 | 江苏省沙钢钢铁研究院有限公司 | Method for baking electric furnace by molten iron |
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Open date: 20080924 |