CN105543447A - In-furnace dephosphorizing method for intermediate frequency furnace - Google Patents
In-furnace dephosphorizing method for intermediate frequency furnace Download PDFInfo
- Publication number
- CN105543447A CN105543447A CN201511001073.3A CN201511001073A CN105543447A CN 105543447 A CN105543447 A CN 105543447A CN 201511001073 A CN201511001073 A CN 201511001073A CN 105543447 A CN105543447 A CN 105543447A
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- CN
- China
- Prior art keywords
- intermediate frequency
- furnace
- frequency furnace
- stove
- dephosphorizing method
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- 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.)
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Classifications
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- 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
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/064—Dephosphorising; Desulfurising
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- 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
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/52—Manufacture of steel in electric furnaces
- C21C5/5241—Manufacture of steel in electric furnaces in an inductively heated furnace
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention discloses an in-furnace dephosphorizing method for an intermediate frequency furnace. The in-furnace dephosphorizing method comprises the steps of melting steel and iron materials in the intermediate frequency furnace; adding a prepared dephosphorized slag material in batches in the melting process; adding iron oxide into molten steel or blowing oxygen into the furnace; and pouring or skimming oxidizing slag after phosphorus is removed to meet requirements. By using the in-furnace dephosphorizing method for the intermediate frequency furnace, phosphorus in the molten steel can be rapidly removed, smelting can be further carried out through pouring or skimming the oxidizing slag by tilting a furnace body after phosphorus is removed to meet requirements, the adaptability for raw material waste steel is wider, and the internal quality of molten metal in the intermediate frequency furnace is improved; the molten steel is roughly smelted by using the intermediate frequency furnace in stead of an electric arc furnace, so that the smelting cost is reduced, and the generated waste slag and gases are reduced; and the in-furnace dephosphorizing method is a simple and efficient dephosphorizing operation method.
Description
Technical field
Dephosphorizing method in the stove that the present invention relates to intermediate frequency furnace.
Background technology
In special type steel-making and foundry production, the advantage of intermediate frequency furnace is obvious.But be also strict to the requirement of steel scrap composition, the especially detrimental impurity element such as phosphorus.Society's scrap resources more and more, economy, environmental protection utilize this renewable resources of steel scrap, dephosphorizing method in the stove needing to find a kind of suitable intermediate frequency furnace.
Summary of the invention
Dephosphorizing method in the stove that the object of the present invention is to provide a kind of intermediate frequency furnace, phosphorus in its energy fast eliminating molten steel, after dephosphorization reaches requirement, can continue after oxidation sludge is poured out or clawed to the body of heater that fascinates to smelt, more extensive to raw material steel scrap adaptability, promote the interior quality of intermediate frequency furnace deposite metal liquid, replace electric arc furnace with medium-frequency induction furnace and slightly make steel water, reducing smelting cost, reduce the generation of waste residue, waste gas, is a kind of simple dephosphorization working method efficiently.
For achieving the above object, technical scheme of the present invention be design a kind of intermediate frequency furnace stove in dephosphorizing method, by intermediate frequency furnace molten steel iron charge, the dephosphorization slag charge that portion-wise addition prepares in melting process, and in molten steel, add ferric oxide or to oxygen blast in stove, dephosphorization is poured out after reaching requirement or clawed oxidation sludge.
Preferably, according to the requirement of steel scrap situation and finished product phosphorus, determine slag charge consumption and ferric oxide consumption or oxygen blast intensity.
Preferably, the consumption of slag charge is 2 ~ 6% of molten metal gross weight, and the consumption of ferric oxide is 1 ~ 3% of molten metal gross weight, and after scorification is good, total oxygen content controls at 400 ~ 800ppm.
Preferably, described slag charge comprises lime, fluorite.
Preferably, alkalescence or neutral lining is used.
Preferably, in-furnace temperature controls within 1580 DEG C.
Preferably, adjustment electromagnetic power, the stirring making molten bath keep good, is beneficial to dephosphorization.
Preferably, described oxidation sludge comprises following component composition: calcium oxide 60 ~ 80%, barium oxide 5 ~ 10%, Calcium Fluoride (Fluorspan) 10 ~ 20%, magnesium oxide 5 ~ 10%.
Advantage of the present invention and beneficial effect are: dephosphorizing method in the stove providing a kind of intermediate frequency furnace, phosphorus in its energy fast eliminating molten steel, after dephosphorization reaches requirement, can continue after oxidation sludge is poured out or clawed to the body of heater that fascinates to smelt, more extensive to raw material steel scrap adaptability, promote the interior quality of intermediate frequency furnace deposite metal liquid, replace electric arc furnace with medium-frequency induction furnace and slightly make steel water, reducing smelting cost, reduce the generation of waste residue, waste gas, is a kind of simple dephosphorization working method efficiently.
During intermediate frequency furnace molten steel iron charge, add a certain amount of slag charge: lime, fluorite etc., by molten steel oxygen blast or add ferric oxide, slag charge and ferric oxide add in batches, ensure that slag does not crust, utilize molten steel heat energy, make the slag with certain basicity and oxidisability, stirred by intermediate frequency furnace electromagnetic induction molten steel, accelerate the reaction of slag steel contact interface, phosphorus in fast eliminating molten steel, after dephosphorization reaches requirement, the body of heater that fascinates continues to smelt after pouring out or claw oxidation sludge.It is more extensive to raw material steel scrap adaptability that the inventive method makes intermediate frequency furnace smelt, promote the interior quality of intermediate frequency furnace deposite metal liquid, electric arc furnace can also be replaced with medium-frequency induction furnace and slightly make steel water, reduce smelting cost, reducing the generation of waste residue, waste gas, is a kind of simple dephosphorization working method efficiently.
Compared with prior art, the present invention adopts intermediate frequency furnace to substitute electric arc furnace and recycles scrap smelting technology, not only economy but also the newly measures of decreasing pollution discharge (waste water,waste gas and industrial residue, noise etc.).By making the oxidisability slag of suitable basicity in smelting furnace, can deep dephosphorization be realized, after phosphorus reaches requirement, can pour out or claw high phosphorus slag more than 95%.Compared with carrying out smelting molten steel with electric arc furnace, ton steel can reduce granular material discharged more than 50%, reduces noxious gas emission more than 50%, reduces waste sludge discharge 60-70%.Cost-saving more than 200 yuan (steel alloy is higher).
Embodiment
Below in conjunction with embodiment, the specific embodiment of the present invention is further described.Following examples only for technical scheme of the present invention is clearly described, and can not limit the scope of the invention with this.
The technical scheme that the present invention specifically implements is:
A dephosphorizing method in the stove of intermediate frequency furnace, by intermediate frequency furnace molten steel iron charge, the dephosphorization slag charge that portion-wise addition prepares in melting process, and in molten steel, add ferric oxide or to oxygen blast in stove, dephosphorization is poured out after reaching requirement or clawed oxidation sludge.
According to the requirement of steel scrap situation and finished product phosphorus, determine slag charge consumption and ferric oxide consumption or oxygen blast intensity.
Preferably, the consumption of slag charge is 2 ~ 6% of molten metal gross weight, and the consumption of ferric oxide is 1 ~ 3% of molten metal gross weight, and after scorification is good, total oxygen content controls at 400 ~ 800ppm.
Described slag charge comprises lime, fluorite.
Use alkalescence or neutral lining.
In-furnace temperature controls within 1580 DEG C.
Adjustment electromagnetic power, the stirring making molten bath keep good, is beneficial to dephosphorization.
Described oxidation sludge comprises following component composition: calcium oxide 60 ~ 80%, barium oxide 5 ~ 10%, Calcium Fluoride (Fluorspan) 10 ~ 20%, magnesium oxide 5 ~ 10%.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (8)
1. dephosphorizing method in the stove of intermediate frequency furnace, is characterized in that, by intermediate frequency furnace molten steel iron charge, and the dephosphorization slag charge that portion-wise addition prepares in melting process, and in molten steel, add ferric oxide or to oxygen blast in stove, dephosphorization is poured out after reaching requirement or clawed oxidation sludge.
2. dephosphorizing method in the stove of intermediate frequency furnace according to claim 1, is characterized in that, according to the requirement of steel scrap situation and finished product phosphorus, determines slag charge consumption and ferric oxide consumption or oxygen blast intensity.
3. dephosphorizing method in the stove of intermediate frequency furnace according to claim 2, it is characterized in that, the consumption of slag charge is 2 ~ 6% of molten metal gross weight, and the consumption of ferric oxide is 1 ~ 3% of molten metal gross weight, and after scorification is good, total oxygen content controls at 400 ~ 800ppm.
4. dephosphorizing method in the stove of intermediate frequency furnace according to claim 3, it is characterized in that, described slag charge comprises lime, fluorite.
5. dephosphorizing method in the stove of intermediate frequency furnace according to claim 4, is characterized in that, use alkalescence or neutral lining.
6. dephosphorizing method in the stove of intermediate frequency furnace according to claim 5, it is characterized in that, in-furnace temperature controls within 1580 DEG C.
7. dephosphorizing method in the stove of intermediate frequency furnace according to claim 6, is characterized in that, adjustment electromagnetic power, the stirring making molten bath keep good, is beneficial to dephosphorization.
8. dephosphorizing method in the stove of intermediate frequency furnace according to claim 7, is characterized in that, by weight percentages, and described oxidation sludge comprises following component composition: calcium oxide 60 ~ 80%, barium oxide 5 ~ 10%, Calcium Fluoride (Fluorspan) 10 ~ 20%, magnesium oxide 5 ~ 10%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511001073.3A CN105543447A (en) | 2015-12-29 | 2015-12-29 | In-furnace dephosphorizing method for intermediate frequency furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511001073.3A CN105543447A (en) | 2015-12-29 | 2015-12-29 | In-furnace dephosphorizing method for intermediate frequency furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105543447A true CN105543447A (en) | 2016-05-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511001073.3A Pending CN105543447A (en) | 2015-12-29 | 2015-12-29 | In-furnace dephosphorizing method for intermediate frequency furnace |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101838718A (en) * | 2010-04-02 | 2010-09-22 | 温州开诚机械有限公司 | Medium frequency furnace internal dephosphorization and desulfurization smelting process |
| CN102220452A (en) * | 2011-06-13 | 2011-10-19 | 武汉钢铁(集团)公司 | Method for duplex dephosphorization of intermediate frequency furnace and vacuum induction furnace |
| CN105002326A (en) * | 2015-07-27 | 2015-10-28 | 湖南大学 | Method for preparing low-phosphor and low-sulfur cast steel materials through smelting of intermediate frequency furnace |
| CN105087866A (en) * | 2014-05-20 | 2015-11-25 | 中国科学院金属研究所 | Dephosphorization method for molten steel smelted by medium-frequency induction furnace |
-
2015
- 2015-12-29 CN CN201511001073.3A patent/CN105543447A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101838718A (en) * | 2010-04-02 | 2010-09-22 | 温州开诚机械有限公司 | Medium frequency furnace internal dephosphorization and desulfurization smelting process |
| CN102220452A (en) * | 2011-06-13 | 2011-10-19 | 武汉钢铁(集团)公司 | Method for duplex dephosphorization of intermediate frequency furnace and vacuum induction furnace |
| CN105087866A (en) * | 2014-05-20 | 2015-11-25 | 中国科学院金属研究所 | Dephosphorization method for molten steel smelted by medium-frequency induction furnace |
| CN105002326A (en) * | 2015-07-27 | 2015-10-28 | 湖南大学 | Method for preparing low-phosphor and low-sulfur cast steel materials through smelting of intermediate frequency furnace |
Non-Patent Citations (2)
| Title |
|---|
| 牟宝喜: "《钢铁企业风险与风险管理》", 31 December 2008, 冶金工业出版社 * |
| 陈家祥: "《钢铁冶金学（炼钢部分）》", 31 May 1990, 冶金工业出版社 * |
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Application publication date: 20160504 |
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