CN1023610C - Special smelting process "electroslag induction refining" - Google Patents
Special smelting process "electroslag induction refining" Download PDFInfo
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- CN1023610C CN1023610C CN89109141A CN89109141A CN1023610C CN 1023610 C CN1023610 C CN 1023610C CN 89109141 A CN89109141 A CN 89109141A CN 89109141 A CN89109141 A CN 89109141A CN 1023610 C CN1023610 C CN 1023610C
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- electroslag
- slag
- induction
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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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- 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
- Y02P10/25—Process efficiency
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Abstract
The present invention provides a method for refining pig iron, steel, non-ferrous metal and alloy by electroslag induction, which is characterized in that metal furnace materials and slag are melted in an induction furnace by an electroslag induction refining device, the metal is refined and alloyed by the processes of the induction and electroslag simultaneously carried out, and the control of the temperature of metal liquid and the uniform components of the metal liquid are achieved. The present invention has the advantage that the present invention overcomes the disadvantages of bad induction furnace melted slag refining effect, difficult achieving process of the temperature control and the uniform components of the metal liquid of the electroslag furnace with a line and need of the use of a metal consumable electrode. The pure metal liquid with the uniform components and certain temperature can be manufactured by the method for refining pig iron, steel, non-ferrous metal and alloy by electroslag induction.
Description
The invention belongs to refining of metal or remelting.
The invention provides the method for a kind of electroslag induction wash metal, steel, non-ferrous metal and alloy.
At present, general induction furnace has advantages such as rate of heating is fast, smelting temperature is high, contaminating impurity is few, alloying constituent is even, labor condition is better, but because slag is by the molten metal heating, surface temperature is low, be unfavorable for refining, be usually used in the melting and the insulation of special steel, cast iron, non-ferrous metal and alloy thereof.For electroslag metallurgy, be included in the esr that carries out in the water mold and electroslag casting and in refractory crucible, carry out the lining electroslag melting arranged.The former seasoning metal purity height, as-cast structure is good, but the casting complicated shape liquid metal that foundry goods is used can not be provided; The refining of latter's energy also obtains liquid metal, but molten steel temperature and composition even (special on the bigger stove of capacity) are difficult, and will use metal consumable electrode, has increased energy consumption and production cost in the consumable electrode preparation process.
The objective of the invention is to overcome low, the refining of metal weak effect of slag temperature of induction furnace melting process, and electroslag smelting molten metal temperature and the even unmanageable shortcoming of composition, the characteristics of comprehensive utilization induction heating and electroslag refining, proposing electroslag induction method of refining (being called for short ESIR) is the refining high quality pig iron, steel, non-ferrous metal and alloy, and can realize the novel method of oxide compound DIRECT ALLOYING.
The present invention adopts electroslag induction heat fused metal charge and slag, and molten metal is carried out temperature control, stirring and refining.
Electroslag induction rectification systems principle is shown in Fig. 1, and the electroslag induction furnace structure is shown in Fig. 2, comprises induction furnace and influence chart (2), metal (3), slag (4), electrode (5) and the electroslag transformer (6) of induction power supply (1), induction body.
In the induction furnace (2) of high frequency, intermediate frequency or other frequency, add metal charge (3) and part slag charge (4), because general sampling analysis not in the refining process, should be when batching according to the strict control of melting loss of elements situation alloy content.Send electrofusion then, treat to add after metal charge all melts clearly the slag charge of suitable component, the control slag composition is 20-55% CaO, 30-70% Al
2O
3, 0-15% SiO
2O-30% CaF
2, 5-15% MgO, make slag have good affinability and electrical characteristic, have absorption simultaneously and be mingled with and protect the furnace lining ability.After the slag charge fusing, placed in-line two electrodes of the single-phase bipolar of rotatable lifting (5) are adjusted to induction fire door top, reduce the power of induction furnace this moment.When electrode enters in the slag, electroslag transformer (6) power supply, because slag has certain resistance, electrode send the heating of electricity back.Induction furnace only played and stirred and insulation effect this moment.Because slag temperature height, sweetening power is strong, in a short period of time, sulphur is sloughed more than 80%.Need alloyed metal (AM) for some, can be after electrode descends, the oxide compound or the mineral (chrome ore, vanadium slag, niobium slag, sheelite, oxidation nickel block, molybdenum oxide etc.) that add these alloying elements, rely on the high temperature and the slag gold surface reaction of slag, by the reduction of some active element (carbon and silicon) in the molten metal, carry out DIRECT ALLOYING, thereby obtain the molten metal of certain ingredients, also can take a sample and add alloy and adjust to qualified composition.Cut off electroslag process power supply (6), electrode rises and moves on to off working state, regulates the molten metal temperature to required value with induction furnace then, has a power failure, and comes out of the stove.In induction furnace,, can partly or entirely stay slag as required because the metal mouth is left on the side.Crucible material can be that graphite also can be other refractory materialss such as magnesia according to the finishing metal composition.The ratio of induction furnace power and electroslag transformer capacity is 0.2-5KW/KVA.
The present invention is described in detail for hard nickel white cast iron example to smelt (low chromium) with present method below.
Add 1 kilogram of pig iron in the crucible of high frequency furnace, molten clear back adds slag charge, and its composition is 20-55% CaO, 30-70% Al
2O
3, 0-15% SiO
2, 0-30%CaF
2, 5-15%MgO, also can add simultaneously, but preferably acid slag charge and fluorite be added at last, to alleviate the erosion of furnace lining for basic lining reinforced.After the slag charge fusing, in the Graphite Electrodes insertion slag with diameter 17.5mm, simultaneously the induction furnace power input is transferred to the 1/2-1/4 after melting clearly, make its temperature-stable and have certain stirring capacity.Then, electrode send electricity, and it is 30-60V that the adjusting transformer makes its fire door voltage, and electrode current is at 100-200A.After treating the electroslag process stabilization, add chrome ore and carry out direct Reducing and Alloying.The chrome ore composition that adds is as shown in table 1.Hot metal composition before and after the refining is as shown in table 2, and processing parameter is as shown in table 3.Electrode send electricity after about 10 minutes, and electrode has a power failure and proposes, and adds an amount of ferronickel again, and the induction furnace temperature adjustment is tapped a blast furnace to casting temp.Material after the casting is got the metallographic sample through thermal treatment and is verified as white pig iron, and its hardness HRC is 56.8.
Table 1 chrome ore composition %
Cr
2O
3MgO CaO FeO SiO
2P
2O
5
58.34 17.12 0.15 22.56 0.20 0.08
Hot metal composition % before and after table 2 refining
C Si Mn Cr Ni P S
Refining preceding 4.22 0.69 0.62 0.01 0.01 0.076 0.058
After the refining 2.94 0.50 0.60 2.32 4.26 0.078 0.005
Table 3 smelting process parameter and technical indicator
Induction furnace power 30KW
Electroslag transformer efficiency 20KVA
Chrome ore add-on 62 grams
Metal add-on 1000 grams
Refining time 10 minutes
The quantity of slag 280 grams
Desulfurization degree 90.2%
Chromium recovery rate 92.4%
Claims (3)
1, a kind of new special smelting process-electroslag induction method of refining comprises electroslag and induction smelting process, it is characterized in that slag is controlled to and is divided into 20～55%CaO, 30～70%Al with slag making behind the induction heating fusing metal charge
2O
3, 0～15%SiO
2, 0～30%CaF
2, 5～15%MgO inserts slag with electrode then, carries out refining desulfuration.
2, electroslag induction purifying method according to claim 1 is characterized in that after electrode inserts slag, adds a certain amount of oxide compound and mineral in slag, relies on the slag refining directly to carry out alloying.
3,, it is characterized in that described oxide compound or mineral are chrome ore, vanadium slag, niobium slag, sheelite, oxidation nickel block, molybdenum oxide according to the described electroslag induction purifying method of claim 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN89109141A CN1023610C (en) | 1989-12-11 | 1989-12-11 | Special smelting process "electroslag induction refining" |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN89109141A CN1023610C (en) | 1989-12-11 | 1989-12-11 | Special smelting process "electroslag induction refining" |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1052510A CN1052510A (en) | 1991-06-26 |
| CN1023610C true CN1023610C (en) | 1994-01-26 |
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ID=4857885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN89109141A Expired - Fee Related CN1023610C (en) | 1989-12-11 | 1989-12-11 | Special smelting process "electroslag induction refining" |
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| Country | Link |
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| CN (1) | CN1023610C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5082417B2 (en) * | 2006-12-08 | 2012-11-28 | 住友金属工業株式会社 | Method of melting ultra low sulfur low nitrogen high cleanliness steel |
| CN102994768B (en) * | 2012-08-13 | 2014-04-02 | 西峡县恒冠冶金材料有限公司 | Electro-slag re-melting slag and preparation method thereof |
| CN104561736A (en) * | 2014-12-29 | 2015-04-29 | 芜湖国鼎机械制造有限公司 | High-strength gray cast iron, casting and preparation method of high-strength gray cast iron |
| CN107655333B (en) * | 2016-07-26 | 2023-12-05 | 株洲晨昕中高频设备有限公司 | Composite heating type heat treatment furnace |
| CN110423885B (en) * | 2019-07-31 | 2021-04-20 | 江苏大学 | Method for producing iron-based self-lubricating wear-resistant alloy by using nickel-molybdenum ore additive |
-
1989
- 1989-12-11 CN CN89109141A patent/CN1023610C/en not_active Expired - Fee Related
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|---|---|
| CN1052510A (en) | 1991-06-26 |
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