CN1385544A - Flux for electric furnace steelmaking and its preparation and use method - Google Patents
Flux for electric furnace steelmaking and its preparation and use method Download PDFInfo
- Publication number
- CN1385544A CN1385544A CN01108429A CN01108429A CN1385544A CN 1385544 A CN1385544 A CN 1385544A CN 01108429 A CN01108429 A CN 01108429A CN 01108429 A CN01108429 A CN 01108429A CN 1385544 A CN1385544 A CN 1385544A
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- electric furnace
- flux
- furnace steelmaking
- steelmaking
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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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- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The present invention relates to a flux for smelting steel by using electric furnace, its composition contains (wt%) Al2O3 15-40%, FeO or/and Fe2O3 5-30%, C 2-20% and heating agent 5-20%. Said invention also provides its preparation method and application method. Said invention flux can make electric furnace early form slag both in melting stage, reduce radiation erosion of electric arc to furnace lining, raise utilization rate of electric energy and prolong the service life of furnace lining and furnace cover.
Description
The present invention relates to a kind of steel-making fusing assistant, be applicable to that particularly the steel scrap of Electric furnace steel making melting period is fluxed, and preparation method and using method that should the steel-making fusing assistant.
The furnace melting phase is the main power consumption operation of Electric furnace steel making, improves the utilization ratio of melting period electric energy, improves the melting condition of steel scrap, is the target that numerous metallargists struggle for many years always.After the furnace melting phase begins, form the molten bath ahead of time, produce good foamy slag, for the fusing of accelerating steel scrap, reduce the radiation loss of electric arc, good effect is arranged the work-ing life of the utilization ratio of raising electric energy and prolongation body of heater, bell.Since melting period slagging early, steel scrap is softening, can obtain the excellent metallurgical effect.Usually after must waiting steel scrap to melt gradually in existing technology to form the molten bath, winding-up carbon dust and oxygen making foamed slag and before the molten steel molten bath forms, can only rely on jet in the electric furnace oxygen and fuel and flux promoting the fusing of molten steel scrap of residue in electric furnace.Though this method can promote the fusing of steel scrap, saves energy, equipment input that it need be bigger and fuel, oxygen input have a lot of limitation, are not easy to widespread use.
The purpose of this invention is to provide a kind of flux for electric furnace steelmaking that can impel early stage formation of furnace melting phase slag bath, the preparation method and the using method of this flux for electric furnace steelmaking is provided simultaneously.
For achieving the above object, the present invention has adopted a kind of flux for electric furnace steelmaking, it is characterized in that: it contains following component (weight %): Al
2O
315-40%, FeO is or/and Fe
2O
35-30%, C 2-20%, heat-generating agent 5-20%, other is ancillary component, inevitable composition and impurity.
Heat-generating agent wherein is one or more the mixture among Al, Si, the SiC.
In order to realize purpose of the present invention better, it also contains villaumite, the component of villaumite (weight %): 5-10%; In other unavoidable impurities and composition, contain SiO
2≤ 10%, MgO≤10%, Cl
-+ F
-≤ 6%.
The preparation method of above-mentioned flux for electric furnace steelmaking also is provided, has the steps include: that (1) select heat-generating agent for use, contain Al
2O
3〉=65% high alumina, FeO are or/and Fe
2O
3Powder, carbon dust; Through after the fragmentation, thorough mixing;
(2) the material adding promoting agent of the above-mentioned mixture that obtains is handled through 400 ℃-600 ℃ activity in process furnace;
(3) push balling-up or pack then as required.
In above-mentioned preparation method, heat-generating agent is one or more the mixture among Al, Si, the SiC; In step (2) process, add villaumite.
The using method of above-mentioned flux for electric furnace steelmaking: spread the back or added flux for electric furnace steelmaking with steel scrap when the furnace melting phase begins to feed in raw material in the forward direction electric furnace or at furnace burdening, flux for electric furnace steelmaking is placed on electric furnace electrode utmost point heart circle below.
Adopt flux for electric furnace steelmaking method of the present invention simple, cost is low, can impel the early stage slag bath that forms of furnace melting phase, with softening steel scrap and covering melting electric arc, reduce the radiation etch of electric arc to furnace lining, improve the utilization ratio of electric energy, prolong the work-ing life of furnace lining and bell, can also effectively reduce the nuisance noise of furnace melting phase simultaneously.
Below implementation process of the present invention also is elaborated in conjunction with the embodiments.
The preparation method of flux for electric furnace steelmaking of the present invention is as follows: select high-quality heat-generating agent (as one or more the mixture among Al, Si, the SiC) for use, contain Al
2O
3〉=65% high alumina, FeO is or/and Fe
2O
3Powder, low P, S carbon dust; After the fragmentation of above raw material process, the composition assembly of pressing the electric furnace fusing assistant.Thorough mixing.Wherein each major ingredients than (weight %) is: Al
2O
315-40%, FeO is or/and Fe
2O
35-30%, C 2-20%, heat-generating agent 5-20%, other is ancillary component, inevitable composition and impurity.Then the material adding promoting agent of mixture is handled through 400 ℃-600 ℃ activity in electrical heater or other fuel process furnace, made ball or pack more as required.Wherein in said process, can also add SiO
2And villaumite, the composition of villaumite than (weight %) is: 5-10, and thorough mixing.
In the use of steel-making, Al, C and Si, SiC have inflammable or low-melting characteristic, therefore mainly as heat-generating agent; FeO and C at high temperature react and generate CO gas, so be used as whipping agent, Fe
2O
3At high temperature can combine and generate FeO, but the reactive behavior of FeO to be better than Fe widely with Fe
2O
3, therefore preferably adopt FeO as whipping agent; The SiO that Si, SiC at high temperature generate with FeO
2And Al
2O
3, MgO can adjust the viscosity of slag system, produces easy the to be blistered low melting point slag system of modest viscosity, wherein MgO is the composition of bringing in the various batchings.In order when heating, to reduce the fusing point of fusing assistant, increase the metallurgical active of fusing assistant in addition, can add a certain proportion of villaumite therein.
The content of some compositions too much also can produce the content of adverse influence to flux effect and steel performance, therefore also to limit, as: SiO
2≤ 10%, MgO≤10%, Cl
-+ F
-≤ 6%.
When the furnace melting phase begins to feed in raw material within the forward direction electric furnace, flux for electric furnace steelmaking is added.Flux for electric furnace steelmaking can have been spread the back superimposed at furnace burdening, also can add with steel scrap.Add fashionable flux for electric furnace steelmaking should being placed on below the electric furnace electrode, so that fusing as early as possible after the electrode starting the arc.The consumption of flux for electric furnace steelmaking can be according to the mixed carbon comtent of eaf process and the steel grade decision of being smelted.Can suitably reduce the consumption of steel-making fusing assistant when generally speaking, joining carbon height and smelting high carbon steel kind.
Adopt flux for electric furnace steelmaking of the present invention not need to adjust original electric furnace smelting process in use.Technical process is:
Steel scrap is reinforced _ furnace melting _ oxygen blast fusing _ reduction period operation _ tapping _ _ LF refining _ ingot casting _ stocking.
Embodiment one:
Select for use: high-quality Al 10kg, high alumina (contain Al
2O
3Being 85%) 60kg, steel rolling iron scale (containing FeO 〉=95%) 30kg, spent cathodes (containing C 〉=98%) 11kg, silica (contain SiO
2〉=90%) 14kg, after the broken mixing of above-mentioned raw materials process, with the electrical heater heating, Heating temperature is 550 ℃, and adds villaumite 20kg, heats after 40 minutes and takes out.Adding water glass etc. are as the binding agent pressure ball.Sphere diameter is 25-35mm.
Its main chemical compositions is (%):
Al
2O
3?FeO Al C SiO
2?MgO Cl
-?P S
36 20 7 10 10 9 6 0.004 0.035
Is when smelting the 20CrMnTi steel grade in the electric furnace of 9000KVA with the above-mentioned flux for electric furnace steelmaking of making at nominal capacity 20T, transformer, add in the electric furnace process at steel scrap, add flux for electric furnace steelmaking 140Kg with second basket of material, and be placed in the electric furnace utmost point heart circle.
Under the identical situation of furnace volume, transformer efficiency, smelting steel grade and technology, the comparing result that adds and do not add above flux for electric furnace steelmaking is as follows:
Project " adding " embodiment " does not add " Comparative Examples statistics stove (inferior) 102 105 average fusing times (min) 235 241 average melting electric consumptions (Kwh/t) 558 580 average consumption of electrodes (Kg/t) 6.96 7.20 average bell access times 43 34 average body of heater access times 58 48
Embodiment two:
Select for use: industrial aluminium shot 8kg, high alumina (contain Al
2O
3Be 85%) 50kg, steel-making dedusting mud (containing FeO 〉=75%) 40kg, spent cathodes (containing C 〉=98%) 8kg, SiC or Si 5kg, through super-dry, after broken the mixing, with the electrical heater heating, Heating temperature is 455 ℃ with above-mentioned raw materials, and add villaumite 10kg, heat after 30 minutes and take out.Do not add binding agent and directly push balling-up.Sphere diameter is 25-35mm.
Its main chemical compositions is (%):
Al
2O
3FeO Al C SiC or Si MgO Cl
-P S
36 24 7 8 8 5 2.8 0.04 0.12
Is when smelting the 20# steel grade in the electric furnace of 5500KVA, to finish at the electric furnace furnace burdening with the above-mentioned flux for electric furnace steelmaking of making at nominal capacity 10T, transformer, adding flux for electric furnace steelmaking 100Kg in electric furnace utmost point heart circle.
Under the identical situation of furnace volume, transformer efficiency, smelting steel grade and technology, the comparing result that adds and do not add above flux for electric furnace steelmaking is as follows:
Project " adding " embodiment " does not add " Comparative Examples statistics stove (inferior) 7 11 average fusing times (min) 74.57 82.64 average melting electric consumptions (Kwh/t) 291.01 320.65 average consumption of electrodes (Kg/t) 6.62 7.70 average bell access times 35 25.8 average body of heater access times 50.5 45
Therefore, adopt flux for electric furnace steelmaking of the present invention in EAF Steelmaking Process, to use after, the economic target of electric furnace is obviously optimized, remarkable in economical benefits.
Claims (8)
1, a kind of flux for electric furnace steelmaking is characterized in that: it contains following component (weight %): Al
2O
315-40%, FeO is or/and Fe
2O
35-30%, C 2-20%, heat-generating agent 5-20%, other is ancillary component, inevitable composition and impurity.
2, flux for electric furnace steelmaking according to claim 1 is characterized in that: heat-generating agent is one or more the mixture among Al, Si, the SiC.
3, flux for electric furnace steelmaking according to claim 1 is characterized in that: it also contains villaumite, the component of villaumite (weight %): 5-10%.
4, according to claim 1,2 or 3 described flux for electric furnace steelmaking, it is characterized in that: in other unavoidable impurities and composition, contain SiO
2≤ 10%, MgO≤10%, Cl
-+ F
-≤ 6%.
5, a kind of preparation method of flux for electric furnace steelmaking as claimed in claim 1 the steps include: that (1) select heat-generating agent for use, contain Al
2O
3〉=65% high alumina, FeO are or/and Fe
2O
3Powder, carbon dust; Through after the fragmentation, thorough mixing;
(2) material with the above-mentioned mixture that obtains adds promoting agent, handles through 400 ℃-600 ℃ activity in process furnace;
(3) push balling-up or pack then as required.
6, a kind of preparation method of flux for electric furnace steelmaking as claimed in claim 5 is characterized in that: heat-generating agent is one or more the mixture among Al, Si, the SiC.
7, as the preparation method of claim 5 or 6 described flux for electric furnace steelmaking, it is characterized in that: in step (2) process, add villaumite.
8, a kind of using method of flux for electric furnace steelmaking as claimed in claim 1, it is characterized in that: spread the back or added flux for electric furnace steelmaking with steel scrap when the furnace melting phase begins to feed in raw material in the forward direction electric furnace or at furnace burdening, flux for electric furnace steelmaking is placed on electric furnace electrode utmost point heart circle below.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011084294A CN1177065C (en) | 2001-05-15 | 2001-05-15 | Flux for electric furnace steelmaking and its preparation and use method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011084294A CN1177065C (en) | 2001-05-15 | 2001-05-15 | Flux for electric furnace steelmaking and its preparation and use method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1385544A true CN1385544A (en) | 2002-12-18 |
| CN1177065C CN1177065C (en) | 2004-11-24 |
Family
ID=4657248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011084294A Expired - Fee Related CN1177065C (en) | 2001-05-15 | 2001-05-15 | Flux for electric furnace steelmaking and its preparation and use method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1177065C (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1293209C (en) * | 2003-03-20 | 2007-01-03 | 四川奥龙铸造材料有限公司 | Heating high efficiency sweetening agent |
| CN102534091A (en) * | 2011-12-31 | 2012-07-04 | 上海盛宝冶金科技有限公司 | Heat generating agent for steel making and production method thereof |
| CN107354266A (en) * | 2017-07-28 | 2017-11-17 | 攀钢集团研究院有限公司 | Electric furnace smelting stainless steel foaming agent and its application method |
| CN107354263A (en) * | 2017-07-21 | 2017-11-17 | 淅川县三合冶金材料有限公司 | Converter exothermic mixture and its adding technology |
| CN108913895A (en) * | 2018-08-06 | 2018-11-30 | 邵珠航 | A kind of exothermic mixture of metal smelt and preparation method thereof |
| CN109593904A (en) * | 2019-01-09 | 2019-04-09 | 张辰星 | A kind of environmental protection converter process for making |
| CN110699514A (en) * | 2019-11-12 | 2020-01-17 | 安阳县旺达冶金材料有限公司 | Environment-friendly steelmaking active fluxing agent and preparation method thereof |
| CN111286582A (en) * | 2020-03-24 | 2020-06-16 | 芜湖新兴铸管有限责任公司 | Composite refined pellet, preparation method thereof and steelmaking slagging method |
| CN114131008A (en) * | 2021-11-30 | 2022-03-04 | 河南通宇冶材集团有限公司 | Efficient slagging agent for semisteel tank and preparation method thereof |
-
2001
- 2001-05-15 CN CNB011084294A patent/CN1177065C/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1293209C (en) * | 2003-03-20 | 2007-01-03 | 四川奥龙铸造材料有限公司 | Heating high efficiency sweetening agent |
| CN102534091A (en) * | 2011-12-31 | 2012-07-04 | 上海盛宝冶金科技有限公司 | Heat generating agent for steel making and production method thereof |
| CN107354263A (en) * | 2017-07-21 | 2017-11-17 | 淅川县三合冶金材料有限公司 | Converter exothermic mixture and its adding technology |
| CN107354266A (en) * | 2017-07-28 | 2017-11-17 | 攀钢集团研究院有限公司 | Electric furnace smelting stainless steel foaming agent and its application method |
| CN108913895A (en) * | 2018-08-06 | 2018-11-30 | 邵珠航 | A kind of exothermic mixture of metal smelt and preparation method thereof |
| CN109593904A (en) * | 2019-01-09 | 2019-04-09 | 张辰星 | A kind of environmental protection converter process for making |
| CN110699514A (en) * | 2019-11-12 | 2020-01-17 | 安阳县旺达冶金材料有限公司 | Environment-friendly steelmaking active fluxing agent and preparation method thereof |
| CN111286582A (en) * | 2020-03-24 | 2020-06-16 | 芜湖新兴铸管有限责任公司 | Composite refined pellet, preparation method thereof and steelmaking slagging method |
| CN114131008A (en) * | 2021-11-30 | 2022-03-04 | 河南通宇冶材集团有限公司 | Efficient slagging agent for semisteel tank and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1177065C (en) | 2004-11-24 |
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