CN103993130A - Method for preventing oxidizing slag from being attached to crucible in intermediate frequency furnace smelting process - Google Patents
Method for preventing oxidizing slag from being attached to crucible in intermediate frequency furnace smelting process Download PDFInfo
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- CN103993130A CN103993130A CN201410240411.8A CN201410240411A CN103993130A CN 103993130 A CN103993130 A CN 103993130A CN 201410240411 A CN201410240411 A CN 201410240411A CN 103993130 A CN103993130 A CN 103993130A
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- crucible
- slag
- slag blanket
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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
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Abstract
The invention relates to a method for preventing an oxidizing slag from being attached to a crucible in an intermediate frequency furnace smelting process. The method comprises the following steps: burdening according to the calculated dosage of the steel material, and reserving 1/5 to 2/5 of steel material; firstly, adding 3/5 to 4/5 of steel material to melt down when smelting, scattering lime powder on a slag layer along the circumference of the crucible wall after the slag layer is formed in molten steel, so that the lime powder is stacked between the edge of the slag layer and the crucible wall to form a circle of screen base, and then refilling reserved steel material; moving the liquid level upwards to push the slag layer to float, and forming an isolation zone from the lime powder between the slag layer and the crucible wall, so as to prevent the oxidizing slag from being attached to the crucible wall. By adopting the method disclosed by the invention, the oxidizing slag inside the furnace can be easily removed, the drossing process is time-saving and labor-saving, ramming is avoided, and the crucible of a furnace body is prevented from being damaged.
Description
Technical field
The present invention relates to avoid oxidation sludge to adhere to the method for crucible in a kind of intermediate frequency furnace fusion process, belong to metallurgical technology field.
Background technology
Intermediate frequency furnace is the conventional heating installation of field of metallurgy, also claims medium-frequency induction furnace, has the high feature of short production efficiency of melting period.Intermediate frequency furnace mainly comprises body of heater and crucible.Smelting furnace material is molten clear in crucible, and intermediate frequency furnace has the characteristic of cold slag, and surface is solid-state with air contact surface, with molten steel contact surface be liquid, iron and steel stock molten clearly after, oxidation sludge adheres on the sidewall of crucible on molten steel surface firmly.In molten steel heating process, mobile molten steel is to sidewall of crucible continuous erosion herein, and the chemical erosion of liquid slag to 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 slagging-off, adheres to the oxidation sludge of sidewall of crucible, and the general artificial iron rod ramming of using, easily damages 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, and slagging-off instrument comprises operating handle, is welded on the slag plate that removes of operating handle one end, on the central position of operating handle, is welded with hanger.Before slagging-off, slagging-off platform is placed on to intermediate frequency induction furnace fire door opposite, operator stand on slagging-off platform, utilize driving by hanger, slagging-off instrument to be sling from central position, and move to fire door position, subsequently by medium-frequency induction furnace turndown to certain angle, then being inserted in slag except slag plate slagging-off instrument, move forward and backward by red-tape operati handle, dependence removes slag plate and can rapidly slag be clawed in medium-frequency induction furnace.
Up to now, there is not yet the technology report that can effectively remove or avoid to adhere on intermediate frequency furnace sidewall of crucible slag method.
Summary of the invention
For the deficiencies in the prior art, the present invention relates to avoid oxidation sludge to adhere to the method for sidewall of crucible in a kind of intermediate frequency furnace fusion process, can from stove, remove as much as possible oxidation sludge, improve the quality of products, and reduce the damage of body of heater 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:
In intermediate frequency furnace fusion process, avoid oxidation sludge to adhere to a method for crucible, comprise that step is as follows:
According to steel-making requirements, by the consumption batching of the iron and steel stock calculating, reserved 1/5～2/5 iron and steel stock;
While adopting intermediate frequency furnace melting, first add 3/5～4/5 of iron and steel stock melt clearly, above molten clear molten steel, form after slag blanket, within one week, on slag blanket, be sprinkled into lime powder along sidewall of crucible, lime powder is deposited between slag blanket edge and sidewall of crucible, form a circle to shield base;
Then, renew and add reserved iron and steel stock, the continuous iron and steel stock adding makes to move and promote slag blanket floating on molten steel liquid level, the lime powder being sprinkled into is before this attached on sidewall of crucible, and react generation bubble with oxidation sludge, and 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 to removal in stove.
In the method for the invention, the slag blanket that described molten steel forms is above liquid slag blanket, or liquid slag blanket and solid-state slag blanket.
In the method for the invention, the add-on of lime powder determine according to the oxidation quantity of slag, the height indicator with oxidation sludge in crucible, and the height that adds 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 the tight adhesion of sidewall of crucible, so be easy to be removed.
The present invention, for intermediate frequency furnace removal oxidation sludge as much as possible, reduces the erosion of oxidation sludge to slag lining, reduces being mingled with in molten steel, the object of pure molten steel thereby reach.
Terminological interpretation:
Oxidation sludge is the waste residue producing 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 that step is as follows:
According to steel-making requirements, by the consumption batching of the iron and steel stock calculating, reserved 1/5～2/5 iron and steel stock;
While adopting intermediate frequency furnace melting, first add 3/5～4/5 of iron and steel stock melt clearly, above molten clear molten steel, form after slag blanket, within one week, on slag blanket, be sprinkled into lime powder along sidewall of crucible, lime powder is deposited between slag blanket edge and sidewall of crucible, form a circle to shield base;
Then, renew and add reserved iron and steel stock, the continuous iron and steel stock adding makes to move and promote slag blanket floating on molten steel liquid level, the lime powder being sprinkled into is before this attached on sidewall of crucible, and react generation bubble with oxidation sludge, and between slag blanket and sidewall of crucible, form isolation strip, avoid oxidation sludge to adhere at sidewall of crucible;
Oxidation sludge is clawed to removal in stove with slag removal device.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 realize the object of easily removing oxidation sludge in stove, make the process of skimming time saving and energy saving, the oxidation sludge of avoiding iron rod ramming to adhere 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, the process of skimming is quick, save time, and makes to reproduce reducing slag and becomes slag speed and accelerate, and degassedly goes to be mingled with and the effect of alloying can be better.
3, adopt method of the present invention, can make slag lining erosion degree greatly reduce, can ensure quality product, 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, after reaction, is dissolved in slag and is removed, and can not exert an influence to molten steel, has gone out steel and can directly enter next stove production.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, the work-ing life that can greatly improve body of heater crucible.
Brief description of the drawings
Fig. 1 is along being sprinkled into the schematic diagram after lime powder on the sidewall of crucible solid-state slag blanket of a week in embodiment 1 operation;
Fig. 2 is that the continuous iron and steel stock that adds of embodiment 1 makes to move and promote the schematic diagram that slag blanket floats on molten steel liquid level;
Fig. 3 is along being sprinkled into the schematic diagram after lime powder on the sidewall of crucible liquid slag blanket of a week in embodiment 2 operations;
Fig. 4 is that the continuous iron and steel stock that adds of embodiment 1 makes to move and promote the schematic diagram that slag blanket floats on molten steel liquid level;
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 to this.
Embodiment 1:
Taking 1.5T intermediate frequency furnace as example.Get the raw materials ready by the consumption 1000kg of the iron and steel stock calculating, wherein reserved 200kg iron and steel stock;
While adopting intermediate frequency furnace melting to produce, first add 800kg iron and steel stock to melt clearly, form solid-state slag blanket 3 above molten clear molten steel time, within one week, on slag blanket 3, be sprinkled into lime powder 5 along crucible 4 wall, make lime powder 5 be deposited in slag blanket 3 edges, lime powder is deposited in height on sidewall of crucible and is about solid-state slag blanket and liquid slag layer height 1.1 times; As shown in Figure 1.
Then add reserved 200kg iron and steel stock, the continuous iron and steel stock adding makes molten steel face promote slag blanket floating, as shown in Figure 2.Lime powder is met high temperature and react with oxidation sludge and produce bubble, and oxidation sludge cannot be cemented on sidewall of crucible, with easily oxidation sludge being removed in stove except slag plate, makes to reproduce reducing slag and becomes the quickening of slag speed, degassed go to be mingled with and the effect meeting of alloying better.And slag lining erosion degree is reduced greatly, can ensure quality product, shorten smelting cycle, can effectively protect again body of heater crucible to be without prejudice, ensure safety in production.The lime powder adding directly enters slag blanket after reacting with oxidation sludge, be removed subsequently together with oxidation sludge, and molten steel is not exerted an influence, and one heat steel directly enters next stove after rolling, simple to operate.Lime powder is the waste of steelmaking feed, can disregard cost.
Press the method for the present embodiment, it is still smooth that Reusability is crossed the body of heater crucible slag line place of 10 times, crucible inwall not damaged.
Embodiment 2:
Taking 1.5T intermediate frequency furnace as example.Get the raw materials ready by the iron and steel stock weight 1000kg calculating, wherein reserved 300kg iron and steel stock; While adopting intermediate frequency furnace melting to produce, first add 700kg iron and steel stock to melt clearly, form liquid slag blanket 2 above molten clear molten steel time, within one week, on slag blanket, be sprinkled into lime powder along sidewall of crucible, make lime powder 5 be deposited in slag blanket edge, it is 1.2 times of liquid slag blanket 2 height that lime powder 5 is deposited in height on sidewall of crucible; As shown in Figure 3;
Subsequent operations is identical with embodiment 1.The continuous iron and steel stock adding makes molten steel face promote slag blanket floating, as shown in Figure 4.
Claims (4)
1. in intermediate frequency furnace fusion process, avoid oxidation sludge to adhere to a method for crucible, comprise that step is as follows:
According to steel-making requirements, by the consumption batching of the iron and steel stock calculating, reserved 1/5～2/5 iron and steel stock;
While adopting intermediate frequency furnace melting, first add 3/5～4/5 of iron and steel stock melt clearly, above molten clear molten steel, form after slag blanket, within one week, on slag blanket, be sprinkled into lime powder along sidewall of crucible, lime powder is deposited between slag blanket edge and sidewall of crucible, form a circle to shield base;
Then, renew and add reserved iron and steel stock, the continuous iron and steel stock adding makes to move and promote slag blanket floating on molten steel liquid level, the lime powder being sprinkled into is before this attached on sidewall of crucible, and react generation bubble with oxidation sludge, and between slag blanket and sidewall of crucible, form isolation strip, avoid oxidation sludge to adhere at sidewall of crucible.
2. in intermediate frequency furnace fusion process as claimed in claim 1, avoid oxidation sludge to adhere to the method for crucible, it is characterized in that described slag blanket is liquid slag blanket or solid-state slag blanket.
3. in intermediate frequency furnace fusion process as claimed in claim 1, avoid oxidation sludge to adhere to the method for crucible, it is characterized in that the height indicator in crucible with oxidation sludge, the height that adds lime powder to pile up is 1～1.5 times of oxidation sludge layer height.
4. for a method for the convenient removal oxidation sludge of intermediate frequency furnace, comprise that step is as follows:
According to steel-making requirements, by the consumption batching of the iron and steel stock calculating, reserved 1/5～2/5 iron and steel stock;
While adopting intermediate frequency furnace melting, first add 3/5～4/5 of iron and steel stock melt clearly, above molten clear molten steel, form after slag blanket, within one week, on slag blanket, be sprinkled into lime powder along sidewall of crucible, lime powder is deposited between slag blanket edge and sidewall of crucible, form a circle to shield base;
Then, renew and add reserved iron and steel stock, the continuous iron and steel stock adding makes to move and promote slag blanket floating on molten steel liquid level, the lime powder being sprinkled into is before this attached on sidewall of crucible, and react generation bubble with oxidation sludge, and between slag blanket and sidewall of crucible, form isolation strip, avoid oxidation sludge to adhere at sidewall of crucible;
Oxidation sludge is clawed to removal in stove with slag removal device.
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 |
|---|---|---|---|
| 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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| CN103993130A true CN103993130A (en) | 2014-08-20 |
| CN103993130B CN103993130B (en) | 2016-01-27 |
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| CN201410240411.8A Expired - Fee Related 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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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109764694A (en) * | 2019-01-21 | 2019-05-17 | 鞍钢实业集团有限公司原燃料生产服务分公司 | A kind of intermediate frequency furnace crucible sediment deslagging method for smelting acieral |
| 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)
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| 赵忠等: "用感应炉熔炼时炉衬的粘渣及消除", 《山西冶金》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109764694A (en) * | 2019-01-21 | 2019-05-17 | 鞍钢实业集团有限公司原燃料生产服务分公司 | A kind of intermediate frequency furnace crucible sediment deslagging method for smelting acieral |
| 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 |
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| CN103993130B (en) | 2016-01-27 |
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Granted publication date: 20160127 Termination date: 20180530 |