CN101633972A - Method for adding slag charge and alloy when alloying electric furnace steel tapping - Google Patents
Method for adding slag charge and alloy when alloying electric furnace steel tapping Download PDFInfo
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- CN101633972A CN101633972A CN200910034817A CN200910034817A CN101633972A CN 101633972 A CN101633972 A CN 101633972A CN 200910034817 A CN200910034817 A CN 200910034817A CN 200910034817 A CN200910034817 A CN 200910034817A CN 101633972 A CN101633972 A CN 101633972A
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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)
Abstract
The invention relates to a method for adding charge materials, belonging to metallurgy field, in particular to a method for adding slag charge and alloy when electric furnace steel tapping is alloyed, comprising the following steps: controlling the alloying time of electric furnace steel tapping; starting to add charge materials to carry out alloying when tapping 30T of molten steel; controlling the entering angle of charge materials to molten steel when alloying; ensuring that the falling point of charge materials in a ladle is right opposite to the falling point of molten steel in the ladle; controlling alloying speed; and controlling the whole alloying process within 40 to 60sec. The invention can thoroughly solve the problem that floating 'small islands' are formed on the surface of steel slag in the steel ladle due to out-of-time and insufficient melt of charge materials, can ensure sufficient melt of slag and alloy when the electric furnace tapping steel goes through a refining furnace to obtain uniform alloy components, and can ensure that the first sample of the refining furnace is representative, thereby being beneficial for improving the operational controllability of the refining furnace, and effectively reducing the occurrence of accidents such as power off of the refining furnace and off scale of the components and the like.
Description
Technical field
The present invention relates to a kind of furnace charge adding method of field of metallurgy, add the method for slag charge and alloy during a kind of specifically alloying electric furnace steel tapping.
Background technology
During electric furnace steel tapping, need be in tapping, add a large amount of alloy and slag charge, the shock action of molten steel when utilizing electric furnace steel tapping, with alloy and slag charge fully melts and evenly, make thick steel-making water behind the electric furnace steel tapping when arriving the refining furnace refining, have and melt the slag condition preferably, comparatively ideal alloy ingredient is arranged, and composition is even.Electric furnace production is through a series of innovation transformation and development, and smelting cycle shortens greatly at present, shortens to present 40 minutes by 53 minutes former every stoves, and electric furnace molten steel oxidisability reduces greatly, by being reduced to below the present 700ppm more than the former 1000ppm.The variation that these are a series of makes electric furnace go out the thick steel-making water to refining furnace, the time regular meeting slag charge and alloy occur and melt untimely insufficiently, swim in the slag surface and form " island ", it is under-represented to make refining furnace get first sample.This phenomenon is extremely unfavorable to the smelting of refining furnace, and especially electric furnace step to be gone up the special steel platform by excellent steel, and control requires highly to alloy ingredient, therefore, must thoroughly solve alloying electric furnace steel tapping and have " island " problem.
Summary of the invention
Technical problem to be solved by this invention is: at the shortcoming of above prior art existence, propose a kind of slag surface that can solve in ladle and form floating " island " problem, add the method for slag charge and alloy when making slag and alloy melt sufficient alloying electric furnace steel tapping.
The technical scheme that the present invention solves above technical problem is:
Add the method for slag charge and alloy during alloying electric furnace steel tapping, may further comprise the steps:
(1) control alloying electric furnace steel tapping opportunity: molten steel go out begin to open stove to 30 ton hours after the push-pull valve of feed bin, make furnace charge evenly flow in the ladle along alloy chute;
The angle that furnace charge enters ladle when (2) controlling the electric furnace alloying: when chute is made, chute length is controlled at 4.4～4.6 meters, make the chute lower end over against tap hole when mounted, the vertical range of end distance tap hole pallet is controlled at 1.2～1.5 meters under the chute, be that the angle that the may command furnace charge enters in the ladle reaches requirement, make the drop point of furnace charge in ladle over against the drop point of molten steel in ladle;
(3) speed of control alloying: after chute installs, two current limiting plates of burn-oning apart from chute 1.2～1.5 meters suitable for reading in chute inner arc both sides, current limiting plate is 12～14cm apart from chute bottom centre line vertical range, add speed by adding two current limiting plate control of weldering furnace charge, whole alloying process was controlled at 40～60 seconds.
Advantage of the present invention is: the present invention can thoroughly solve the problem of melting untimely insufficient slag surface formation floating " island " in ladle because of furnace charge, make electric furnace steel tapping to refining furnace, slag and alloy melt fully, alloy ingredient is even, make that refining furnace first sample is representative, help improving the controllability of refining furnace operation, can effectively reduce the generation of accidents such as the refining furnace outage utmost point and composition act improperly.Can effectively improve refining furnace point composition control hit rate, can improve the purity of refining furnace molten steel, go up the special steel platform for electric furnace factory is advanced in years and established certain basis.
Embodiment
Embodiment one
Add the method for slag charge and alloy when present embodiment is a kind of alloying electric furnace steel tapping, specifically implement according to the following steps:
Control alloying electric furnace steel tapping opportunity, molten steel go out begin to open stove to 30 ton hours after the push-pull valve of feed bin, furnace charge is evenly flowed in the ladle along alloy chute.
The angle that furnace charge enters ladle during control electric furnace alloying, specifically when chute is made, chute length is controlled at 4.4～4.6 meters, make the chute lower end over against tap hole when mounted, following end distance tap hole pallet vertical range is controlled at 1.2～1.5 meters, be that the angle that the may command furnace charge enters in the ladle reaches requirement, make the drop point of furnace charge in ladle over against the drop point of molten steel in ladle.
The speed of control alloying, whole alloying process is controlled at 40-60 second, concrete control method adopts the circular roll bending of Φ 40cm when being the chute making, after chute installs, in chute inner arc both sides apart from 1.2～1.5 meters suitable for reading, two current limiting plates of burn-oning, current limiting plate is 12～14cm apart from chute bottom centre line vertical range, current limiting plate is an isosceles right triangle, the right angle length of side 6～8cm, by adding these two current limiting plates of weldering is that the may command furnace charge adds speed, makes whole alloying process be controlled at 40-60 second.
By the enforcement of above 3 concrete measures, can not in time fully melt the technology difficult problem of the slag surface forms in ladle floating " island " in the time of can thoroughly solving alloying electric furnace steel tapping because of furnace charge.
The present invention can also have other embodiment, and the technical scheme that equal replacement of all employings or equivalent transformation form all drops within the scope of protection of present invention.
Claims (2)
1. add the method for slag charge and alloy during alloying electric furnace steel tapping, it is characterized in that: may further comprise the steps:
(1) control alloying electric furnace steel tapping opportunity: molten steel go out begin to open stove to 30 ton hours after the push-pull valve of feed bin, make furnace charge evenly flow in the ladle along alloy chute;
The angle that furnace charge enters ladle when (2) controlling the electric furnace alloying: when chute is made chute length is controlled at 4.4～4.6 meters, makes the chute lower end over against tap hole when mounted, the vertical range of end distance tap hole pallet is controlled at 1.2～1.5 meters under the chute;
(3) speed of control alloying: after chute installs, two current limiting plates of burn-oning apart from chute 1.2～1.5 meters suitable for reading in chute inner arc both sides, current limiting plate is 12～14cm apart from chute bottom centre line vertical range, add speed by adding two current limiting plate control of weldering furnace charge, whole alloying process was controlled at 40～60 seconds.
2. the method that adds slag charge and alloy during alloying electric furnace steel tapping as claimed in claim 1, it is characterized in that: in the described step (3), adopt the circular roll bending of Φ 40cm when described chute is made, described current limiting plate is an isosceles right triangle, the right angle length of side 6～8cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910034817XA CN101633972B (en) | 2009-09-04 | 2009-09-04 | Method for adding slag charge and alloy when alloying electric furnace steel tapping |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910034817XA CN101633972B (en) | 2009-09-04 | 2009-09-04 | Method for adding slag charge and alloy when alloying electric furnace steel tapping |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101633972A true CN101633972A (en) | 2010-01-27 |
| CN101633972B CN101633972B (en) | 2010-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200910034817XA Expired - Fee Related CN101633972B (en) | 2009-09-04 | 2009-09-04 | Method for adding slag charge and alloy when alloying electric furnace steel tapping |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104278128A (en) * | 2014-09-17 | 2015-01-14 | 宁夏共享铸钢有限公司 | Method for preventing electrode from breaking off during smelting of high-alloy steel in steel ladle refining furnace |
| CN108127090A (en) * | 2017-02-28 | 2018-06-08 | 安徽工业大学 | A kind of molten steel alloying device in protection tapping process and the electric furnace steel-making system with the device |
| CN108285947A (en) * | 2017-02-28 | 2018-07-17 | 安徽工业大学 | A kind of molten steel alloyage process in protection tapping process |
| CN113897473A (en) * | 2021-08-20 | 2022-01-07 | 江阴兴澄特种钢铁有限公司 | Control device and method for alloy adding speed of electric furnace EBT steel tapping feeding pipe |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2584611Y (en) * | 2002-12-18 | 2003-11-05 | 鞍钢集团机械制造公司 | Non-bell blast furnace chute lining board |
| CN100500874C (en) * | 2007-05-09 | 2009-06-17 | 北京科技大学 | Method of pre-fining molten steel in tapping process |
-
2009
- 2009-09-04 CN CN200910034817XA patent/CN101633972B/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104278128A (en) * | 2014-09-17 | 2015-01-14 | 宁夏共享铸钢有限公司 | Method for preventing electrode from breaking off during smelting of high-alloy steel in steel ladle refining furnace |
| CN104278128B (en) * | 2014-09-17 | 2016-06-15 | 宁夏共享铸钢有限公司 | A kind of method of anti-electrode fracture when ladle refining furnace is smelted high-alloy steel |
| CN108127090A (en) * | 2017-02-28 | 2018-06-08 | 安徽工业大学 | A kind of molten steel alloying device in protection tapping process and the electric furnace steel-making system with the device |
| CN108285947A (en) * | 2017-02-28 | 2018-07-17 | 安徽工业大学 | A kind of molten steel alloyage process in protection tapping process |
| CN108285947B (en) * | 2017-02-28 | 2019-09-27 | 安徽工业大学 | A kind of molten steel alloyage process in protection tapping process |
| CN108127090B (en) * | 2017-02-28 | 2023-12-01 | 安徽工业大学 | Molten steel alloying device for protecting tapping process and electric furnace steelmaking system with same |
| CN113897473A (en) * | 2021-08-20 | 2022-01-07 | 江阴兴澄特种钢铁有限公司 | Control device and method for alloy adding speed of electric furnace EBT steel tapping feeding pipe |
| CN113897473B (en) * | 2021-08-20 | 2023-03-07 | 江阴兴澄特种钢铁有限公司 | Control device and method for alloy adding speed of electric furnace EBT steel tapping feeding pipe |
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| Publication number | Publication date |
|---|---|
| CN101633972B (en) | 2010-12-29 |
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