CN1038518C - Submerged-arc scum for steel chamber refinery furnace - Google Patents
Submerged-arc scum for steel chamber refinery furnace Download PDFInfo
- Publication number
- CN1038518C CN1038518C CN93106599A CN93106599A CN1038518C CN 1038518 C CN1038518 C CN 1038518C CN 93106599 A CN93106599 A CN 93106599A CN 93106599 A CN93106599 A CN 93106599A CN 1038518 C CN1038518 C CN 1038518C
- Authority
- CN
- China
- Prior art keywords
- scum
- arc
- submerged
- slag
- whipping agent
- 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.)
- Expired - Fee Related
Links
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
Abstract
The present invention relates to submerged-arc scum which is a matching technique for a steel chamber refining furnace, and is mainly used for enhancing electric arc heating efficiency and reducing the erosion to a chamber lining. The submerged-arc scum of the present invention is composed of basic scum and a foaming agent, wherein the basic scum is used for providing an appropriate scum forming condition for the submerged-arc scum, and the foaming agent is the air source of the submerged-arc scum. The submerged-arc scum of the present invention can achieve the purposes of enhancing the electric arc heating efficiency and reducing the burning loss to the chamber lining as well as meet the requirements of deoxidation, desulfurization and impurity removal. The thickness of the submerged-arc scum can reach more than two times of that of the basic scum, the desulfurization rate reaches more than 70%, and the service life of the chamber lining is enhanced by 5 times than that of the chamber lining not using the submerged-arc scum. The submerged-arc scum can also be used for the reduction period of an electric furnace.
Description
The invention belongs to the production or the refining of metal.
Steel bucket finery is the refining furnace with heating unit, because its heating and refining excellent performance, this technology obtains significant progress.The arc temperature of steel bucket finery is up to 6000 ℃, and three spread of electrodes furnace walls are extremely near, cause intense radiation and etch to refractory materials, and heat-energy losses is very big.Rattan wood wisdoms etc., iron γ steel 1988,74 (10): 1962 once utilized CaO-MgO-SiO
2-Al
2O
3Slag system is as submerged arc slag, and this slag has strong sweetening power, owing to wherein lack whipping agent, for submerged arc certainly will will increase the quantity of slag, this not only can increase the energy consumption of slag, and can bring disadvantageous effect to later deoxidation and vacuum refinement.SteelTimes, l988, (11): 607, make submerged arc slag with diamide lime, the composition CaO55-60% of its slag, SiO
216-24%, MgO8-12%, Al
2O
38-12%, CaF
2＜3%.Because of it does not contain strong reductor, can influence the deoxidation and the sweetening power of slag; With containing CaC
2Submerged arc slag can be made the desulfurization slag of strong reducing property, and this slag is easy to weathering and suction, is difficult for preserving, and contains CaC in the slag
2Many, also be unfavorable for the performance of its affinability, simultaneously, CaC
2Cost higher, be unfavorable for applying.
The present invention seeks in order to improve the foaming power of refining furnace submerged arc slag, increase the foaming hold-time of submerged arc slag, improve the deoxidation and the sweetening power of slag, a kind of new slagging method is provided, wherein the submerged arc slag with steel bucket finery or electric arc furnace reduction period is divided into basic slag and foaming slag two portions, both can satisfy electric arc and be capped the requirement that buries, and can guarantee the slag deoxidation again, desulfurization, reduce steel inclusion, reach the purpose of liquid steel refining.
Submerged arc slag of the present invention is achieved in that basic slag and whipping agent dispose the composition metering respectively, all calculate by mass percentage; Basic slag consists of CaO50-60%, SiO
215-25%, Al
2O
35-10%, MgO8-10%, CaF
25-10%; Corresponding whipping agent consist of CaCO
250-70%, CaC
220-40%, C6-10%.
The whipping agent of steel bucket finery submerged arc slag of the present invention, it consists of CaCO
315-25%, CaCl
210-30%, NaCl15-35%, CaC
220-60%.According to smelting requirements, use basic slag, corresponding selection whipping agent, synthetic different steel drum or the submerged arc slags of forming of electric furnace reduction phase.
The basic quantity of slag 20-35kg/t of the present invention, the whipping agent quantity of slag is 3-8kg/t.In the steel bucket finery after the basic slag fusing, and add whipping agent in batches or continuously by refining time.Second kind of adding method of basic slag of the present invention and whipping agent after basic slag dissolves in the steel bucket finery, will add basic slag and whipping agent in batches, according to the requirement of foaming hold-time of submerged arc slag, determine the lot number of whipping agent, also add serially.The adding method adopts packed and in bulk, adds submerged arc slag in batches or spray continuously to add submerged arc slag.
Submerged arc slag of the present invention can bury electric arc, thereby weakens the radiation of arc light, reduces the consumption of refractory materials, saves energy consumption, and improves heating and refining condition.
The advantage of submerged arc slag of the present invention:
1. the refractory materials of protection furnace wall and bell reduces scaling loss, thereby improves the barrel liner life-span;
2. improve the heat transfer efficiency in molten bath, reduce thermosteresis, shorten refining time, boost productivity;
3. improve the transmission system working conditions, reduce maintenance of equipment work amount;
4. the minimizing arc hissing improves workman's labor condition.
Steel drum refining submerged arc slag of the present invention can be used for the reduction period of steel bucket finery or electric arc furnace.
Submerged arc slag of the present invention, foaming effect is obvious, and the hold-time is long, and the thickness of slag layer of its foaming is more than two times of basic slag.Guarantee that submerged arc slag has the desulfurization degree more than 70%, make the refining furnace barrel liner life-span, than raising 5 stoves without submerged arc slag.
Claims (2)
- L, steel bucket finery submerged arc slag slagging method is characterized in that submerged arc slag comprises basic slag and whipping agent, and basic slag, whipping agent dispose composition respectively, and basic slag consists of CaO5 0-60%, SiO 215-25%Al 2O 35-10%, MgO8-10%, CaF 25-10%, whipping agent consist of CaCO 350-70%, CaC 220-40%, C 6-10%; The quantity of slag of basic slag is 20-35kg/t, and the quantity of slag of whipping agent is 3-8kg/t, after the basic slag fusing in the steel bucket finery, adds whipping agent in batches or continuously, and whipping agent adds lot number and determines according to the foaming hold-time.
- 2, the whipping agent described in the method for claim 1 is characterized in that whipping agent composition CaCO 3Be 15-25%, CaCl 210-30%, NaCl 15-35%, CaC 220-60%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93106599A CN1038518C (en) | 1993-06-07 | 1993-06-07 | Submerged-arc scum for steel chamber refinery furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93106599A CN1038518C (en) | 1993-06-07 | 1993-06-07 | Submerged-arc scum for steel chamber refinery furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1096823A CN1096823A (en) | 1994-12-28 |
| CN1038518C true CN1038518C (en) | 1998-05-27 |
Family
ID=4986316
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN93106599A Expired - Fee Related CN1038518C (en) | 1993-06-07 | 1993-06-07 | Submerged-arc scum for steel chamber refinery furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1038518C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1039832C (en) * | 1995-10-16 | 1998-09-16 | 李林 | Dephosphorising agent for iron and steel foam |
| CN1078620C (en) * | 1999-11-30 | 2002-01-30 | 宝山钢铁股份有限公司 | Ladle finer reduction foaming agent |
| CN102296150B (en) * | 2011-08-17 | 2013-05-01 | 郑州东升冶金新材料有限公司 | Submerged arc foaming refining agent and preparation method thereof |
| CN107299195A (en) * | 2017-06-23 | 2017-10-27 | 什邡市三裕锻件有限公司 | A kind of use lime stone makes the steelmaking method of ladle refining furnace of floride-free foamed slag |
| CN111100967B (en) * | 2020-01-13 | 2021-02-09 | 北京科技大学 | Foaming agent, tundish covering agent and preparation method and application thereof |
| CN112813225A (en) * | 2020-12-28 | 2021-05-18 | 芜湖新兴铸管有限责任公司 | Control method for reducing power consumption in refining of ordinary steel |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1058049A (en) * | 1990-04-06 | 1992-01-22 | 谭氏陶器有限公司 | The composition and the method that are used for Synthetic Steel cinder inclusion, processing ladle slag and coating refractory cylinder-packing |
-
1993
- 1993-06-07 CN CN93106599A patent/CN1038518C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1058049A (en) * | 1990-04-06 | 1992-01-22 | 谭氏陶器有限公司 | The composition and the method that are used for Synthetic Steel cinder inclusion, processing ladle slag and coating refractory cylinder-packing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1096823A (en) | 1994-12-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Applicant after: University of Science and Technology Beijing Applicant after: Changcheng Special Steel Co. Applicant after: Daye Special Steel Co., Ltd. Applicant before: University of Science and Technology Beijing |
|
| CB03 | Change of inventor or designer information |
Inventor after: Zhang Jian Inventor after: Niu Sitong Inventor after: Tong Fusheng Inventor after: Wang Ping Inventor after: Cheng Guoguang Inventor after: Yang Dehua Inventor after: Wang Jianzhi Inventor after: Yi Jisong Inventor after: Chen Jinquan Inventor before: Zhang Jian Inventor before: Niu Sitong Inventor before: Tong Fusheng Inventor before: Wang Ping Inventor before: Cheng Guoguang |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |