CN109554516A - A kind of method of the poly- slag of electromagnetic induction heating - Google Patents
A kind of method of the poly- slag of electromagnetic induction heating Download PDFInfo
- Publication number
- CN109554516A CN109554516A CN201710890025.7A CN201710890025A CN109554516A CN 109554516 A CN109554516 A CN 109554516A CN 201710890025 A CN201710890025 A CN 201710890025A CN 109554516 A CN109554516 A CN 109554516A
- Authority
- CN
- China
- Prior art keywords
- electromagnetic induction
- slag
- induction coil
- induction heating
- ladle
- 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.)
- Pending
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0087—Treatment of slags covering the steel bath, e.g. for separating slag from the molten metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/005—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like with heating or cooling means
- B22D41/01—Heating means
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0075—Treating in a ladle furnace, e.g. up-/reheating of molten steel within the ladle
Abstract
The present invention relates to a kind of methods of the poly- slag of electromagnetic induction heating, comprising: 1) electromagnetic induction heating system is made of power control cabinet and electromagnetic induction coil, and induction heat can be generated when electromagnetic induction coil is passed through alternating current；2) electromagnetic induction coil is embedded in hot-metal bottle/ladle in the side wall of bottom, when hot-metal bottle/ladle is skimmed, it is powered by power control cabinet to electromagnetic induction coil, it will be heated back to tapping hole/tapping hole position molten iron/molten steel, high temperature liquid iron/molten steel flows up after heating, circulation is formed in entire hot-metal bottle/ladle, to promote the aggregation of desulfurization slag, the desulfurization slag of aggregation passes through removal of skimming.The present invention pushes the flowing of molten iron or molten steel by electromagnetic induction heating, promotes the aggregation of desulfurization slag, can exclude dead angle of skimming, and reduction is skimmed movement, is shortened slag-removing time, is improved operating efficiency, reduces the brings secondary pollution such as skim of blowing, reduction production cost.
Description
Technical field
The present invention relates to iron and steel smelting technology field more particularly to a kind of methods of the poly- slag of electromagnetic induction heating.
Background technique
In steelmaking process, Desulphuring Process of Molten Iron has obtained promotion and application at present, but skims after generally existing desulfurization
Iron loss is big, and corner part is skimmed not clean problem.From the point of view of production practices, treated scum there are basicity high, poor fluidity
The problem of, clinker is scattered and broken, thus causes slag-removing time long, and a large amount of molten iron are as clinker is lost during skimming, molten iron loss
Seriously, yield and steel technology index be will have a direct impact on.
Currently, the domestic processing Multi-purpose mechanical slagging-off method to slag after desulfurization, skims iron loss mainly from two using this method
Aspect, first is that the molten drop wrapped up in slag making, second is that molten iron fluctuation is caused to overflow molten iron from tank mouth when skimming.Publication No.
The utility model patent of CN201264091 describes a kind of novel molten iron drossing plate, when being skimmed with the slag removal device, can pass through
Notch observe slag removal device immerse molten iron position, according to the observation come adjust slag removal device immerse molten steel depth, can effectively drop
Low iron loss, but increase the labor intensity of worker.
If remained slag volume is excessively high in hot-metal bottle, the slag after making desulfurization is brought into converter, and sulphur when converter tapping is caused to contain
Measure it is higher, become production low-sulfur steel restricted link.Residue is mainly made of the slag of corner part and the scattered slag on molten iron surface,
It is difficult to remove only with mechanical means.The patent of invention of publication number CN101260452 proposes that a kind of molten iron pre-processes poly- slag
Agent is removed, its slag absorbing, poly- slag ability are stronger, and viscosity is larger, can fast and effeciently separate iron and the slag in clinker.But it is this outer
The method of the poly- slag of doping, the influence to molten iron composition need further research.The patent of invention of Publication No. CN1439729
Liquid iron pretreatment blowing slag forming process is discussed with the utility model patent of Publication No. CN2602032, it will by blowing device
Gas is blown under molten iron level, is floated using gas and molten iron is driven to boil, and changes the state for being trapped in ladle surface slag, is promoted
It polymerize.Wuhan Iron and Steel Plant uses the technique of deslagging by gas blow to hot-metal bottle, is tested by deslagging by gas blow hydraulic analogy, and tie
It closes live actual production and the relevant parameter of reasonable hot-metal bottle air brick has been determined, improve the condition of skimming, achieve certain
Effect.But the technological parameter blown needs to control to adjust, while blowing and having a significant effect to molten iron temperature.
Electromagnetic field is one of physical field important in nature, has the advantages that many pyroelectric technologies are incomparable, most aobvious
The characteristics of work be its can non contact transmission kinetic energy and thermal energy to molten steel, it is not polluted.And electromagnetic induction heating is utilized to promote
It is not yet reported that in terms of the poly- slag of molten steel convection current.
Summary of the invention
The present invention provides a kind of methods of the poly- slag of electromagnetic induction heating, push molten iron or molten steel by electromagnetic induction heating
Flowing, promote the aggregation of desulfurization slag, can exclude dead angle of skimming, reduction is skimmed movement, is shortened slag-removing time, is improved operation and imitate
Rate reduces the brings secondary pollution such as skim of blowing, and reduces production cost.
In order to achieve the above object, the present invention is implemented with the following technical solutions:
A kind of method of the poly- slag of electromagnetic induction heating, includes the following steps:
1) electromagnetic induction heating system is made；Electromagnetic induction heating system is made of power control cabinet and electromagnetic induction coil, electricity
Magnetic induction coil is connect with power control cabinet；Power control cabinet provides intermediate frequency power supply for electromagnetic induction coil, and frequency is 200~20000Hz, volume
Determine power 10kW~500kW, power is continuously adjustable, and induction heat can be generated when electromagnetic induction coil is passed through alternating current；
2) electromagnetic induction heating system is installed；Electromagnetic induction coil is embedded in hot-metal bottle/ladle close to the side wall of bottom
It is interior, when hot-metal bottle/ladle is skimmed, it is powered by power control cabinet to electromagnetic induction coil, it will be back to tapping hole/tapping hole position
Molten iron/molten steel heating, high temperature liquid iron/molten steel flows up after heating, circulation is formed in entire hot-metal bottle/ladle, to promote
Into the aggregation of desulfurization slag, the desulfurization slag of aggregation passes through removal of skimming.
The electromagnetic induction coil is circular ring shape, is process by high-temperature electric conduction material.
Compared with prior art, the beneficial effects of the present invention are:
1) flowing that molten iron or molten steel are pushed by electromagnetic induction heating, promotes the aggregation of desulfurization slag, can exclude to skim
Movement of skimming is reduced at dead angle, shortens slag-removing time, extends the service life of slag-off machine, improves operating efficiency；
2) compared with air blowing slag skimming method, the present invention enters molten iron without additional refractory material, can be to avoid the secondary of molten iron
Pollution reduces the consumption of the resistance to materials such as gas blow pipe.Reduce production cost；
3) electromagnetic induction coil is made of the high temperature conductive material such as graphite or zirconium oxide, can be to avoid making without cooling
With cooling water bring security risk, it is suitble to industrial production application；
4) easy to operate, molten iron/molten steel temperature drop can be reduced, iron loss is reduced, is conducive to produce direct motion.
Detailed description of the invention
Fig. 1 is the schematic diagram of the method for the poly- slag of electromagnetic induction heating of the present invention.
In figure: 1. electromagnetic induction coil, 2. 3. hot-metal bottles of power control cabinet/4. molten iron of ladle/5. tapping holes of molten steel/tapping
6. desulfurization slags of mouth
Specific embodiment
Specific embodiments of the present invention will be further explained with reference to the accompanying drawing:
As shown in Figure 1, a kind of method of the poly- slag of electromagnetic induction heating of the present invention, includes the following steps:
1) electromagnetic induction heating system is made；Electromagnetic induction heating system is made of power control cabinet 2 and electromagnetic induction coil 1,
It is connected between electromagnetic induction coil 1 and power control cabinet 2 by copper bar, water-cooled cable；Power control cabinet 2 is during electromagnetic induction coil 1 provides
Frequency power, frequency are 200~20000Hz, and rated power 10kW~500kW, power is continuously adjustable, and electromagnetic induction coil 1 is passed through
Induction heat can be generated when alternating current；
2) electromagnetic induction heating system is installed；Electromagnetic induction coil 1 is embedded in hot-metal bottle/ladle 3 close to the side of bottom
In wall working lining, when hot-metal bottle/ladle 3 is skimmed, by power control cabinet 2 to electromagnetic induction coil 1 be powered, will back to tapping hole/
Molten iron/molten steel 4 of 5 position of tapping hole heats, and high temperature liquid iron/molten steel 4 flows up after heating, in entire hot-metal bottle/ladle 3
Circulation is formed, to promote the aggregation of desulfurization slag 6, the desulfurization slag 6 of aggregation passes through removal of skimming.
The electromagnetic induction coil 1 is circular ring shape, is process by high-temperature electric conduction material.
Following embodiment is implemented under the premise of the technical scheme of the present invention, gives detailed embodiment and tool
The operating process of body, but protection scope of the present invention is not limited to following embodiments.Method therefor is such as without spy in following embodiments
Not mentionleting alone bright is conventional method.
[embodiment 1]
1) after installing electromagnetic induction heating system, 100 tons of hot-metal bottles are tilted a certain angle preparation and start to skim；
2) electromagnetic induction heating system that power is 100kW is opened, moves upwards promotion molten iron using high temperature liquid iron
Flow poly- slag；
3) it is skimmed using slag-off machine, molten iron can also continue flowing, poly- slag under the promotion of high temperature liquid iron while skimming；
It cleans out rear hot-metal bottle and is prepared to enter into next process.
In the present embodiment, the average time skimmed is reduced to 13 minutes/time by 15 original minutes/time, and ton steel takes off slag iron
Damage is reduced to 13kg/t by 16kg/t.
[embodiment 2]:
1) after installing electromagnetic induction heating system, 180 tons of ladles are tilted a certain angle preparation and start to skim；
2) electromagnetic induction heating system that power is 200kW is opened, moves upwards promotion molten steel using high-temperature molten steel
Flow poly- slag；
3) it after desulfurization slag is assembled, is skimmed using slag-off machine；It cleans out rear ladle and is prepared to enter into next process.
In the present embodiment, the average time skimmed is reduced to 12 minutes/time by 13 original minutes/time, and ton steel takes off slag iron
Damage is reduced to 12kg/t by 15kg/t.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (2)
1. a kind of method of the poly- slag of electromagnetic induction heating, which comprises the steps of:
1) electromagnetic induction heating system is made；Electromagnetic induction heating system is made of power control cabinet and electromagnetic induction coil, electromagnetism sense
Coil is answered to connect with power control cabinet；Power control cabinet provides intermediate frequency power supply for electromagnetic induction coil, and frequency is 200~20000Hz, specified function
Rate 10kW~500kW, power is continuously adjustable, and induction heat can be generated when electromagnetic induction coil is passed through alternating current；
2) electromagnetic induction heating system is installed；Electromagnetic induction coil is embedded in hot-metal bottle/ladle in the side wall of bottom,
When hot-metal bottle/ladle is skimmed, by power control cabinet to electromagnetic induction coil be powered, by back to tapping hole/tapping hole position molten iron/
Molten steel heating, high temperature liquid iron/molten steel flows up after heating, circulation is formed in entire hot-metal bottle/ladle, to promote desulfurization
The desulfurization slag of the aggregation of slag, aggregation passes through removal of skimming.
2. a kind of method of the poly- slag of electromagnetic induction heating as described in claim 1, which is characterized in that the electromagnetic induction coil
For circular ring shape, it is process by high-temperature electric conduction material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710890025.7A CN109554516A (en) | 2017-09-27 | 2017-09-27 | A kind of method of the poly- slag of electromagnetic induction heating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710890025.7A CN109554516A (en) | 2017-09-27 | 2017-09-27 | A kind of method of the poly- slag of electromagnetic induction heating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109554516A true CN109554516A (en) | 2019-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710890025.7A Pending CN109554516A (en) | 2017-09-27 | 2017-09-27 | A kind of method of the poly- slag of electromagnetic induction heating |
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| CN (1) | CN109554516A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111299560A (en) * | 2020-04-08 | 2020-06-19 | 河北新兴铸管有限公司 | Ladle slag gathering device and slag gathering method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102266926A (en) * | 2011-08-09 | 2011-12-07 | 无锡巨力重工股份有限公司 | Novel intermediate tank electromagnetic induction metallurgical system |
| CN105665670A (en) * | 2016-01-27 | 2016-06-15 | 东北大学 | Side-wall type tundish induction heating and mixing technical method |
| CN106282470A (en) * | 2015-06-09 | 2017-01-04 | 宝山钢铁股份有限公司 | Poly-slag slag skimming method and device |
-
2017
- 2017-09-27 CN CN201710890025.7A patent/CN109554516A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102266926A (en) * | 2011-08-09 | 2011-12-07 | 无锡巨力重工股份有限公司 | Novel intermediate tank electromagnetic induction metallurgical system |
| CN106282470A (en) * | 2015-06-09 | 2017-01-04 | 宝山钢铁股份有限公司 | Poly-slag slag skimming method and device |
| CN105665670A (en) * | 2016-01-27 | 2016-06-15 | 东北大学 | Side-wall type tundish induction heating and mixing technical method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111299560A (en) * | 2020-04-08 | 2020-06-19 | 河北新兴铸管有限公司 | Ladle slag gathering device and slag gathering method |
| CN111299560B (en) * | 2020-04-08 | 2021-11-30 | 河北新兴铸管有限公司 | Ladle slag gathering device and slag gathering method |
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Application publication date: 20190402 |