CN103993130B - Oxidation sludge is avoided to adhere to the method for crucible in a kind of intermediate frequency furnace fusion process - Google Patents
Oxidation sludge is avoided to adhere to the method for crucible in a kind of intermediate frequency furnace fusion process Download PDFInfo
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- CN103993130B CN103993130B CN201410240411.8A CN201410240411A CN103993130B CN 103993130 B CN103993130 B CN 103993130B CN 201410240411 A CN201410240411 A CN 201410240411A CN 103993130 B CN103993130 B CN 103993130B
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- crucible
- slag blanket
- iron
- sidewall
- oxidation sludge
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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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Abstract
The present invention relates in a kind of intermediate frequency furnace fusion process the method avoiding oxidation sludge to adhere to crucible.The method comprises prepares burden by the consumption of the iron and steel stock calculated, the iron and steel stock of reserved 1/5 ~ 2/5; First adding 3/5 ~ 4/5 of iron and steel stock during melting carries out melting down, after forming slag blanket, within one week, on slag blanket, is sprinkled into lime powder along sidewall of crucible above melting down molten steel, lime powder is deposited in be formed between slag blanket edge and sidewall of crucible one to enclose to shield and build; Then, renew and add reserved iron and steel stock, liquid level moves and promotes slag blanket floating, lime powder forms isolation strip between slag blanket and sidewall of crucible, avoids oxidation sludge to adhere at sidewall of crucible.The inventive method easily can remove stove internal oxidition slag, makes the process of skimming time saving and energy saving, avoids ramming, and protection body of heater crucible is without prejudice.
Description
Technical field
The present invention relates in a kind of intermediate frequency furnace fusion process the method avoiding oxidation sludge to adhere to crucible, belong to metallurgical technology field.
Background technology
Intermediate frequency furnace is that field of metallurgy commonly uses heating installation, also claims medium-frequency induction furnace, has the high feature of melting period short production efficiency.Intermediate frequency furnace mainly comprises body of heater and crucible.Smelting furnace material is melting down in crucible, and intermediate frequency furnace has the characteristic of cold slag, and surface and air contact surfaces are solid-state, and be liquid with molten steel contact surface, after iron and steel stock is melting down, oxidation sludge adheres on the sidewall of crucible on molten steel surface firmly.In molten steel heating process, the molten steel of flowing is to sidewall of crucible continuous erosion herein, and liquid slag is to the chemical erosion of sidewall of crucible in addition, forms slag line hole.In order to maximally utilise the power of stove, slagging-off that must be fast as far as possible.Surface slag blanket generally adopts Slag Tool to remove the gred, and adheres to the oxidation sludge of sidewall of crucible, general artificial iron rod ramming, and easily damage body of heater crucible, reduces pot life.
CN202532906U utility model discloses a kind of device of quick removing medium-frequency induction furnace slag, and it comprises slagging-off platform, slagging-off instrument; Slagging-off instrument is positioned at the top of slagging-off platform, slagging-off instrument comprises operating handle, be welded on operating handle one end except slag plate, the central position of operating handle is welded with hanger.Before slagging-off, slagging-off platform is placed on intermediate frequency induction furnace fire door opposite, operator stand on slagging-off platform, driving is utilized to be sling from central position by slagging-off instrument by hanger, and move to fire door position, subsequently by medium-frequency induction furnace turndown to certain angle, be inserted in slag then by slagging-off instrument except slag plate, moved forward and backward by red-tape operati handle, rely on except slag can claw by slag plate rapidly in medium-frequency induction furnace.
Up to now, there is not yet the technology report effectively removing or avoid intermediate frequency furnace sidewall of crucible adheres to slag method.
Summary of the invention
For the deficiencies in the prior art, the present invention relates in a kind of intermediate frequency furnace fusion process the method avoiding oxidation sludge to adhere to sidewall of crucible, can remove as much as possible for oxidation sludge from stove, improve the quality of products, and reduce body of heater damaged crucible.
The present invention also provides a kind of method for the convenient removal oxidation sludge of intermediate frequency furnace.
Technical solution of the present invention is as follows:
Avoid oxidation sludge to adhere to a method for crucible in intermediate frequency furnace fusion process, comprise step as follows:
According to steel-making requirements, prepare burden by the consumption of the iron and steel stock calculated, the iron and steel stock of reserved 1/5 ~ 2/5;
When adopting intermediate frequency furnace melting, first add 3/5 ~ 4/5 of iron and steel stock and carry out melting down, form slag blanket above melting down molten steel after, within one week, on slag blanket, be sprinkled into lime powder along sidewall of crucible, lime powder is deposited in be formed between slag blanket edge and sidewall of crucible one to enclose to shield and build;
Then, renew and add reserved iron and steel stock, the continuous iron and steel stock added makes molten steel liquid level moves and promotes slag blanket floating, the lime powder be sprinkled into before this is attached on sidewall of crucible, and react with oxidation sludge and produce bubble, between slag blanket and sidewall of crucible, form isolation strip, avoid oxidation sludge to adhere at sidewall of crucible.
Adopt method of the present invention, because oxidation sludge cannot adhere at crucible, just can with slag removal device easily easily oxidation sludge is clawed removal in stove.
In the method for the invention, the slag blanket that described molten steel is formed above is liquid slag blanket, or liquid slag blanket and solid-state slag blanket.
In the method for the invention, the add-on of lime powder is determined according to the oxidation quantity of slag, and with the height indicator of oxidation sludge in crucible, the height adding lime powder accumulation is 1 ~ 1.5 times of slag blanket height above molten steel.
Lime powder calcium hydroxide, meet pyrolytic decomposition produce carbonic acid gas, be dissolved in slag, produce foamy slag, make oxidation sludge cannot with sidewall of crucible close adhesion, so be easy to be removed.
The present invention is used for intermediate frequency furnace removal oxidation sludge as much as possible, reduces oxidation sludge to the erosion of slag lining, thus reaches being mingled with in minimizing molten steel, the object of pure molten steel.
Terminological interpretation:
Oxidation sludge is the waste residue produced in intermediate frequency furnace fusion process, and main component is ferric oxide, manganese oxide. aluminium dioxide. and Vanadium Pentoxide in FLAKES etc.
For a method for the convenient removal oxidation sludge of intermediate frequency furnace, comprise step as follows:
According to steel-making requirements, prepare burden by the consumption of the iron and steel stock calculated, the iron and steel stock of reserved 1/5 ~ 2/5;
When adopting intermediate frequency furnace melting, first add 3/5 ~ 4/5 of iron and steel stock and carry out melting down, form slag blanket above melting down molten steel after, within one week, on slag blanket, be sprinkled into lime powder along sidewall of crucible, lime powder is deposited in be formed between slag blanket edge and sidewall of crucible one to enclose to shield and build;
Then, renew and add reserved iron and steel stock, the continuous iron and steel stock added makes molten steel liquid level moves and promotes slag blanket floating, the lime powder be sprinkled into before this is attached on sidewall of crucible, and react with oxidation sludge and produce bubble, between slag blanket and sidewall of crucible, form isolation strip, avoid oxidation sludge to adhere at sidewall of crucible;
With slag removal device, oxidation sludge is clawed removal in stove.Avoid ramming crucible.
Compared with prior art, excellent results of the present invention is as follows:
1, adopt method of the present invention can be easy to the object realizing easily removing stove internal oxidition slag, make the process of skimming time saving and energy saving, avoid the oxidation sludge that iron rod ramming adheres to, protection body of heater crucible is without prejudice;
2, adopt method of the present invention, because oxidation sludge does not adhere at crucible substantially, polyvinyl chloride of skimming, to save time, make to reproduce reducing slag and become slag speed and accelerate, degassedly go to be mingled with and the effect of alloying can be better.
3, adopt method of the present invention, slag lining erosion degree can be made greatly to reduce, can quality product be ensured, shorten smelting cycle, can effectively protect again body of heater crucible to be without prejudice, ensure safety in production.
4, lime powder is the waste of steelmaking feed, can not increase production cost, is dissolved in slag and is removed after reaction, can not have an impact to molten steel, has gone out steel and directly can enter the production of next stove.Present method is simple to operate, repeatedly verifies through production practice, uses the smooth not damaged in body of heater crucible slag line place repeatedly, and greatly can improve the work-ing life of body of heater crucible.
Accompanying drawing explanation
Fig. 1 is sprinkled into the schematic diagram after lime powder along on the sidewall of crucible solid-state slag blanket of a week during embodiment 1 operates;
Fig. 2 is that the continuous iron and steel stock that adds of embodiment 1 makes molten steel liquid level to move the schematic diagram promoting slag blanket and float;
Fig. 3 is sprinkled into the schematic diagram after lime powder along on the sidewall of crucible liquid slag blanket of a week during embodiment 2 operates;
Fig. 4 is that the continuous iron and steel stock that adds of embodiment 1 makes molten steel liquid level to move the schematic diagram promoting slag blanket and float;
In figure, 1, molten steel; 2, liquid slag blanket; 3, solid-state slag blanket; 4, body of heater crucible; 5, lime powder.
Embodiment
Below in conjunction with embodiment, the invention will be further described, but be not limited thereto.
Embodiment 1:
For 1.5T intermediate frequency furnace.Get the raw materials ready by the consumption 1000kg of the iron and steel stock calculated, wherein reserved 200kg iron and steel stock;
When adopting intermediate frequency furnace melting to produce, first adding 800kg iron and steel stock carries out melting down, when forming solid-state slag blanket 3 above melting down molten steel, slag blanket 3 was sprinkled into lime powder 5 in one week along crucible 4 wall, make lime powder 5 be deposited in slag blanket 3 edge, the lime powder height be deposited on sidewall of crucible is about 1.1 times of solid-state slag blanket and liquid slag layer height; As shown in Figure 1.
Then add reserved 200kg iron and steel stock, the continuous iron and steel stock added makes molten steel face promote slag blanket floating, as shown in Figure 2.Lime powder is met high temperature and oxidation sludge and react and produces bubble, oxidation sludge cannot be cemented on sidewall of crucible, removed by oxidation sludge easily with except slag plate in stove, make to reproduce the quickening of reducing slag change slag speed, degassed go to be mingled with and alloying effect meeting better.And slag lining erosion degree is reduced greatly, can quality product be ensured, shorten smelting cycle, can effectively protect body of heater crucible to be without prejudice, ensure safety in production.Directly enter slag blanket after the lime powder added and oxidation sludge react, be removed subsequently, do not have an impact to molten steel together with oxidation sludge, one heat steel directly enters next stove after rolling, simple to operate.Lime powder is the waste of steelmaking feed, can disregard cost.
By the method for the present embodiment, it is still smooth that Reusability crosses the body of heater crucible slag line place of 10 times, crucible internal walls not damaged.
Embodiment 2:
For 1.5T intermediate frequency furnace.Get the raw materials ready by the iron and steel stock weight 1000kg calculated, wherein reserved 300kg iron and steel stock; When adopting intermediate frequency furnace melting to produce, first adding 700kg iron and steel stock carries out melting down, when forming liquid slag blanket 2 above melting down molten steel, slag blanket was sprinkled into lime powder in one week along sidewall of crucible, make lime powder 5 be deposited in slag blanket edge, lime powder 5 height be deposited on sidewall of crucible is 1.2 times of liquid slag blanket 2 height; As shown in Figure 3;
Subsequent operations is identical with embodiment 1.The continuous iron and steel stock added makes molten steel face promote slag blanket floating, as shown in Figure 4.
Claims (3)
1. avoid oxidation sludge to adhere to a method for crucible in intermediate frequency furnace fusion process, comprise step as follows:
According to steel-making requirements, prepare burden by the consumption of the iron and steel stock calculated, the iron and steel stock of reserved 1/5 ~ 2/5;
When adopting intermediate frequency furnace melting, first add 3/5 ~ 4/5 of iron and steel stock and carry out melting down, form slag blanket above melting down molten steel after, within one week, on slag blanket, be sprinkled into lime powder along sidewall of crucible, lime powder is deposited in be formed between slag blanket edge and sidewall of crucible one to enclose to shield and build;
Then, renew and add reserved iron and steel stock, the continuous iron and steel stock added makes molten steel liquid level moves and promotes slag blanket floating, the lime powder be sprinkled into before this is attached on sidewall of crucible, and react with oxidation sludge and produce bubble, between slag blanket and sidewall of crucible, form isolation strip, avoid oxidation sludge to adhere at sidewall of crucible;
With the height indicator of oxidation sludge in crucible, the height adding lime powder accumulation is 1 ~ 1.5 times of oxidation sludge layer height.
2. avoid oxidation sludge to adhere to the method for crucible in intermediate frequency furnace fusion process as claimed in claim 1, it is characterized in that described slag blanket is liquid slag blanket, or liquid slag blanket and solid-state slag blanket.
3., for a method for the convenient removal oxidation sludge of intermediate frequency furnace, comprise step as follows:
According to steel-making requirements, prepare burden by the consumption of the iron and steel stock calculated, the iron and steel stock of reserved 1/5 ~ 2/5;
When adopting intermediate frequency furnace melting, first add 3/5 ~ 4/5 of iron and steel stock and carry out melting down, form slag blanket above melting down molten steel after, within one week, on slag blanket, be sprinkled into lime powder along sidewall of crucible, lime powder is deposited in be formed between slag blanket edge and sidewall of crucible one to enclose to shield and build;
Then, renew and add reserved iron and steel stock, the continuous iron and steel stock added makes molten steel liquid level moves and promotes slag blanket floating, the lime powder be sprinkled into before this is attached on sidewall of crucible, and react with oxidation sludge and produce bubble, between slag blanket and sidewall of crucible, form isolation strip, avoid oxidation sludge to adhere at sidewall of crucible;
With slag removal device, oxidation sludge is clawed removal in stove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410240411.8A CN103993130B (en) | 2014-05-30 | 2014-05-30 | Oxidation sludge is avoided to adhere to the method for crucible in a kind of intermediate frequency furnace fusion process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410240411.8A CN103993130B (en) | 2014-05-30 | 2014-05-30 | Oxidation sludge is avoided to adhere to the method for crucible in a kind of intermediate frequency furnace fusion process |
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| Publication Number | Publication Date |
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| CN103993130A CN103993130A (en) | 2014-08-20 |
| CN103993130B true CN103993130B (en) | 2016-01-27 |
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| CN109764694B (en) * | 2019-01-21 | 2020-10-20 | 鞍钢实业集团有限公司原燃料生产服务分公司 | Intermediate frequency furnace crucible slag settling and removing method for smelting aluminum-based alloy |
| CN112362524A (en) * | 2020-10-30 | 2021-02-12 | 山东莱钢永锋钢铁有限公司 | Method for testing water yield of granular steel sample |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1289740A (en) * | 2000-09-30 | 2001-04-04 | 武钢耐火冶金粉剂厂 | Oxygen sprayer and slag isolating and detaching agent for metallurgical furnace |
| CN102965474A (en) * | 2012-11-22 | 2013-03-13 | 河南省西保冶材集团有限公司 | Anti-slag agent for high temperature VD (Vaccum Distillation) furnace |
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- 2014-05-30 CN CN201410240411.8A patent/CN103993130B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1289740A (en) * | 2000-09-30 | 2001-04-04 | 武钢耐火冶金粉剂厂 | Oxygen sprayer and slag isolating and detaching agent for metallurgical furnace |
| CN102965474A (en) * | 2012-11-22 | 2013-03-13 | 河南省西保冶材集团有限公司 | Anti-slag agent for high temperature VD (Vaccum Distillation) furnace |
Non-Patent Citations (1)
| Title |
|---|
| 用感应炉熔炼时炉衬的粘渣及消除;赵忠等;《山西冶金》;20000228(第1期);第1节 * |
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Granted publication date: 20160127 Termination date: 20180530 |