CN109487091B - Electroslag remelting arc striking agent and preparation method thereof - Google Patents
Electroslag remelting arc striking agent and preparation method thereof Download PDFInfo
- Publication number
- CN109487091B CN109487091B CN201910026937.9A CN201910026937A CN109487091B CN 109487091 B CN109487091 B CN 109487091B CN 201910026937 A CN201910026937 A CN 201910026937A CN 109487091 B CN109487091 B CN 109487091B
- Authority
- CN
- China
- Prior art keywords
- slag
- powder
- raw materials
- arc
- aluminum
- 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.)
- Active
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/16—Remelting metals
- C22B9/18—Electroslag remelting
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to an electroslag remelting arc initiator and a preparation method thereof, wherein the electroslag remelting arc initiator comprises the following raw materials in percentage by weight: fluorite powder: 40% -60%; alumina powder: 10% -20%; magnesia: 5% -10%; titanium dioxide: 1% -3%; waste graphite electrode powder: 1% -4%; the balance of mixture of iron filings and aluminum powder; the weight ratio of the iron chips to the aluminum powder is 5: 1-8: 1 and mixing. The advantages are that: the prepared arc striking slag has the advantages of wide application range, small current fluctuation, stable arc striking and the like. The arc-striking agent is matched with iron and aluminum filaments with good toughness, so that the arc-striking agent is not easy to pulverize during long-term storage and use.
Description
Technical Field
The invention belongs to the technical field of electroslag remelting metallurgy, and particularly relates to an electroslag remelting arc initiator and a preparation method thereof.
Background
At the beginning of electroslag remelting, in order to melt the consumable electrode smoothly, a high-temperature liquid slag pool needs to be established first. Two methods are used for establishing the slag pool, one method is a liquid slag arc striking method, namely, a special slag melting furnace is used for melting slag used for striking an arc, and then the slag is injected into a crystallizer to complete arc striking of electroslag remelting so as to form a liquid slag pool; the other method is a solid slag arc striking method, in which a consumable electrode is directly contacted with solid slag in a crystallizer to gradually melt the solid slag, and then remelted slag is added to continue melting, thereby forming a liquid slag pool. The liquid arc ignition method needs to melt the slag charge of arc ignition in advance by a special slagging furnace, so that the working procedures are relatively complicated and difficult to operate.
It is known that slag in a molten state during electroslag remelting has a certain electric conductivity, but when slag is in a solid state, the electric conductivity is poor, and the slag cannot be directly used for conducting electricity and generating heat to establish a slag bath. In practice, it has been found that when the solid slag contains a certain amountOf TiO 22This requirement can be satisfied. In the article "carbon arc-striking agent replaces the conductive slag arc-striking of Qinzhi to produce G20CrNi2MoA electric slag steel" published in the document "Special Steel (No. 4 of 2004), it is introduced that titanium white powder 50% (TiO as main component) is used in some factories2Content of it>99%) and 50% fluorite (CaF as main component)2Content of it>97%) as raw material. However, many problems are also exposed during use, TiO2The mass ignition agent is fragile, cannot be probed by a consumable electrode during charging, and can only be used in a fixed furnace head type electroslag furnace. In addition, Ti is easily increased in steel ingots, so that the arc striking agent can only be suitable for smelting steel grades with high titanium content. In order to prevent Ti increase beyond the standard, the Chinese patent with application number of 201610020094.8 discloses an electroslag remelting arc-striking agent and an arc-striking method, which are prepared by adopting derusting steel scraps and pseudo-ginseng slag according to the mass ratio of 4: l. The arc striking agent can prevent Ti increase, but the arc striking agent needs special manufacture, has higher requirement and complex process, and has the biggest defects that the arc striking agent contains a large amount of steel scraps with good conductivity, and the arc striking agent can cause large current fluctuation and unstable arc striking in the using process.
The Chinese patent with application number 201610722871.3 discloses an arc striking agent for electroslag remelting and a manufacturing method thereof, and the arc striking agent comprises the following components in parts by weight: CaF2:60～70％；Al2O3:20～25％；TiO2: 3-5 percent of metal scraps of the same steel grade, and the balance of the metal scraps is similar to the pseudo-ginseng slag in terms of the mixture ratio of the components, except that TiO with relatively good solid-state conductivity is added in the metal scraps2And steel scrap of the same kind as the steel grade. The arc striking agent has moderate conductivity, stable current and stable arc striking, but has certain defects, and because steel scraps with the same components as steel grades need to be added in the component proportioning process, the preparation is directly difficult, and the application range of the prepared arc striking agent is narrow because the components and the contents of different steel grades are different greatly. The Chinese patent with the application number of 201710025154.X discloses an electroslag remelting solid slag arc striking agent and an arc striking method thereof, wherein the arc striking agent mainly comprises scrap iron, and 3-5% of premelting slag are added into the scrap iron0.3-0.5% of aluminum, which causes large current fluctuation and unstable arc starting in the arc striking process, and is easy to cause the current breakdown of the plugging plate at the bottom of the crystallizer.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide an electroslag remelting arc initiator and a preparation method thereof, which can reduce current fluctuation and have stable arc initiation.
In order to achieve the purpose, the invention is realized by the following technical scheme:
an electroslag remelting arc initiator comprises the following raw materials in percentage by weight:
fluorite powder: 40% -60%; alumina powder: 10% -20%; magnesia: 5% -10%; titanium dioxide: 1% -3%; waste graphite electrode powder: 1% -4%; the balance of mixture of iron filings and aluminum powder; the weight ratio of the iron chips to the aluminum powder is 5: 1-8: 1, mixing;
wherein CaF in the fluorite powder2In an amount of>96% of Al in alumina powder2O3In an amount of>98 percent of MgO in the magnesia>99 percent of TiO in titanium dioxide2In an amount of>98% of C content in the waste graphite electrode>99 percent of scrap iron, by weight percent: c<0.03％；Si<0.02％；Mn<0.05％；P<0.003％；S<0.002%; the balance of Fe; al content in aluminum powder>99％。
The iron filings and the aluminum powder are filiform objects with the length less than 30mm, and the rest raw materials are powder with the particle diameter less than 200 meshes.
A preparation method of an electroslag remelting arc initiator comprises the following steps:
1) mixing the raw materials except the iron chips and the aluminum powder according to the proportion, uniformly mixing, and then putting the mixture into a baking furnace at the temperature of 300-500 ℃ for baking for more than 4 hours to remove water in the raw materials;
2) putting the dried raw materials into an electroslag furnace to be smelted into slag, continuously stirring a molten pool in the smelting process to ensure that various molten raw materials are more uniform, adding aluminum particles into liquid slag to remove oxygen in slag after the raw materials are completely molten, wherein the adding amount of the aluminum particles is 0.5-2% of the total weight of the slag;
3) stopping smelting after the liquid slag is kept warm for 20-40 minutes, pouring the liquid slag into another cooling container from the electroslag furnace, and taking out the liquid slag after the liquid slag is naturally cooled into solid slag;
4) crushing the taken solid slag into granular particles with the diameter of 5-10 mm, and then adding the raw material scrap iron and aluminum powder into the crushed slag charge and uniformly mixing;
5) briquetting the uniformly mixed material in the step 4) by using a die, and putting the pressed slag blocks into a sealed container for storage for later use.
Compared with the prior art, the invention has the beneficial effects that:
1. iron and aluminum filaments with good toughness are matched in the arc striking agent, so that the arc striking agent is not easy to pulverize in the long-term storage and use processes;
2. when the arc striking agent is used, the arc striking current fluctuation is small and stable, so that the danger that the bottom of the crystallizer is punctured due to large arc striking current fluctuation can be eliminated;
3)TiO2the content of C is lower, so that the titanium and carbon of the steel ingot can be effectively prevented from being increased;
4) the added iron and aluminum filaments have pure components, can be suitable for various steel grades, and have wider applicability.
Drawings
FIG. 1 is a flow chart of the manufacturing process of the present invention.
Detailed Description
The present invention is described in detail below, but it should be noted that the practice of the present invention is not limited to the following embodiments.
An electroslag remelting arc initiator comprises the following raw materials in percentage by weight:
fluorite powder: 40% -60%; alumina powder: 10% -20%; magnesia: 5% -10%; titanium dioxide: 1% -3%; waste graphite electrode powder: 1% -4%; the balance of mixture of iron filings and aluminum powder; the weight ratio of the iron chips to the aluminum powder is 5: 1-8: 1, mixing;
wherein CaF in the fluorite powder2In an amount of>96% of Al in alumina powder2O3In an amount of>98 percent of MgO in the magnesia>99 percent of TiO in titanium dioxide2In an amount of>98% of C content in the waste graphite electrode>99 percent of scrap iron, by weight percent: c<0.03％；Si<0.02％；Mn<0.05％；P<0.003％；S<0.002%; the balance of Fe; al content in aluminum powder>99 percent. The iron filings and the aluminum powder are filiform particles with the length less than 30mm, and the rest raw materials are powder with the particle diameter less than 200 meshes.
Referring to fig. 1, a preparation method of an electroslag remelting arc initiator comprises the following steps:
1) mixing the raw materials except the iron chips and the aluminum powder according to the proportion, uniformly mixing, and then putting the mixture into a baking furnace at the temperature of 300-500 ℃ for baking for more than 4 hours to remove water in the raw materials;
2) putting the dried raw materials into an electroslag furnace to be smelted into slag, continuously stirring a molten pool in the smelting process to ensure that various molten raw materials are more uniform, adding aluminum particles into liquid slag to remove oxygen in slag after the raw materials are completely molten, wherein the adding amount of the aluminum particles is 0.5-2% of the total weight of the slag;
3) stopping smelting after the liquid slag is kept warm for 20-40 minutes, pouring the liquid slag into another cooling container from the electroslag furnace, and taking out the liquid slag after the liquid slag is naturally cooled into solid slag;
4) crushing the taken solid slag into granular particles with the diameter of 5-10 mm, and then adding the raw material scrap iron and aluminum powder into the crushed slag charge and uniformly mixing;
5) briquetting the uniformly mixed material in the step 4) by using a die, and putting the pressed slag blocks into a sealed container for storage for later use.
The first embodiment is as follows:
an electroslag remelting arc initiator comprises the following raw materials in percentage by weight:
fluorite powder: 40 percent; alumina powder: 10 percent; magnesia: 5 percent; titanium dioxide: 1 percent; waste graphite electrode powder: 1 percent; the balance of iron chips and aluminum powder, and the weight ratio of the iron chips to the aluminum powder is 5: 1 and mixing.
The preparation method of electroslag remelting arc-striking agent comprises mixing the above raw materials except iron chips and aluminum powder, baking in a baking furnace at 350 deg.C for 6 hr, smelting the dried raw materials in an electroslag furnace to form slag, stirring the molten pool continuously in the smelting process to ensure that various molten raw materials are more uniform and after the raw materials are completely molten, adding oxygen in aluminum particle deslagging into liquid slag, adding aluminum in an amount accounting for 0.8 percent of the total slag weight, keeping the temperature of the liquid slag for 30 minutes, stopping smelting, pouring the liquid slag into another cooling container from an electroslag furnace, and taking out the liquid slag after naturally cooling the liquid slag into solid slag, crushing the solid slag into granular particles with the diameter of 6mm, mixing filiform raw materials of iron chips and aluminum powder into the crushed slag, uniformly mixing, briquetting the uniformly mixed materials by using a die, and putting the pressed slag blocks into a sealed container for storage for later use.
Example two:
an electroslag remelting arc initiator comprises the following raw materials in percentage by weight:
fluorite powder: 45 percent; alumina powder: 15 percent; magnesia: 7 percent; titanium dioxide: 2 percent; waste graphite electrode powder: 2.5 percent; the balance of iron chips and aluminum powder according to the weight ratio of 5: 1, mixing.
The preparation method of electroslag remelting arc-striking agent comprises mixing the above raw materials except iron chips and aluminum powder, baking at 400 deg.C for 5 hr, smelting the dried raw materials in an electroslag furnace to form slag, stirring the molten pool continuously in the smelting process to ensure that various molten raw materials are more uniform and after the raw materials are completely molten, adding oxygen in aluminum particle deslagging to liquid slag, adding aluminum in an amount accounting for 1% of the total slag weight, keeping the temperature of the liquid slag for 30 minutes, stopping smelting, pouring the liquid slag into another cooling container from an electroslag furnace, taking out the liquid slag after naturally cooling the liquid slag into solid slag, crushing the solid slag into granular particles with the diameter of 8mm, mixing the prepared filiform raw materials of the scrap iron and the aluminum powder into the crushed slag, and uniformly mixing, briquetting the uniformly mixed materials by using a die, and putting the pressed slag blocks into a sealed container for storage for later use.
Example three:
an electroslag remelting arc initiator comprises the following raw materials in percentage by weight:
fluorite powder: 55 percent; alumina powder: 18 percent; magnesia: 9 percent; titanium dioxide: 3 percent; waste graphite electrode powder: 3 percent; the balance of iron and aluminum according to the weight ratio of 5: 1, preparing the mixture;
the preparation method of electroslag remelting arc-striking agent is characterized by that except iron filings and aluminium powder, the raw materials prepared according to the above-mentioned mixing ratio are uniformly mixed, then placed in a baking furnace with 450 deg.C to bake for 4 hr, then the dried raw material is placed in an electroslag furnace to smelt into slag, and the molten pool is continuously stirred in the smelting process so as to make the various molten raw materials more uniform. After the raw materials are completely melted, adding aluminum particles to liquid slag for removing oxygen in slag, wherein the adding amount of aluminum is 1.5 percent of the total slag weight, keeping the temperature of the liquid slag for 30 minutes, stopping smelting, pouring the liquid slag into another cooling container from an electroslag furnace, taking out the liquid slag after the liquid slag is naturally cooled into solid slag, crushing the solid slag into granular particles with the diameter of 9mm, mixing the prepared filiform raw materials of iron chips and aluminum powder into the crushed slag and uniformly mixing the mixture, briquetting the uniformly mixed material by using a die, and putting the pressed slag blocks into a sealed container for later use.
The arc striking agent for electroslag remelting can ensure that the prepared arc striking slag has the advantages of wide application range, small current fluctuation, stable arc striking and the like.
Claims (2)
1. The electroslag remelting arc initiator is characterized by comprising the following raw materials in percentage by weight:
fluorite powder: 40% -60%; alumina powder: 10% -20%; magnesia: 5% -10%; titanium dioxide: 1% -3%; waste graphite electrode powder: 1% -4%; the balance of mixture of iron filings and aluminum powder; the weight ratio of the iron chips to the aluminum powder is 5: 1-8: 1, mixing;
wherein CaF in the fluorite powder2In an amount of>96% of Al in alumina powder2O3In an amount of>98 percent of MgO in the magnesia>99 percent of TiO in titanium dioxide2In an amount of>98% of waste graphite electrodeContent of C>99 percent of scrap iron, by weight percent: c<0.03％；Si<0.02％；Mn<0.05％；P<0.003％；S<0.002%; the balance of Fe; al content in aluminum powder>99 percent; the iron filings and the aluminum powder are filaments with the length less than 30 mm;
the preparation method of the electroslag remelting arc initiator comprises the following steps:
1) mixing the raw materials except the iron chips and the aluminum powder according to the proportion, uniformly mixing, and then putting the mixture into a baking furnace at the temperature of 300-500 ℃ for baking for more than 4 hours to remove water in the raw materials;
2) putting the dried raw materials into an electroslag furnace to be smelted into slag, continuously stirring a molten pool in the smelting process to ensure that various molten raw materials are more uniform, adding aluminum particles into liquid slag to remove oxygen in slag after the raw materials are completely molten, wherein the adding amount of the aluminum particles is 0.5-2% of the total weight of the slag;
3) stopping smelting after the liquid slag is kept warm for 20-40 minutes, pouring the liquid slag into another cooling container from the electroslag furnace, and taking out the liquid slag after the liquid slag is naturally cooled into solid slag;
4) crushing the taken solid slag into granular particles with the diameter of 5-10 mm, and then adding the raw material scrap iron and aluminum powder into the crushed slag charge and uniformly mixing;
5) briquetting the uniformly mixed material in the step 4) by using a die, and putting the pressed slag blocks into a sealed container for storage for later use.
2. The electroslag remelting arc-striking agent according to claim 1, wherein the fluorite powder, alumina powder, magnesia, titanium dioxide and waste graphite electrode powder are powder with particle diameter less than 200 meshes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910026937.9A CN109487091B (en) | 2019-01-11 | 2019-01-11 | Electroslag remelting arc striking agent and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910026937.9A CN109487091B (en) | 2019-01-11 | 2019-01-11 | Electroslag remelting arc striking agent and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109487091A CN109487091A (en) | 2019-03-19 |
| CN109487091B true CN109487091B (en) | 2020-09-22 |
Family
ID=65714442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910026937.9A Active CN109487091B (en) | 2019-01-11 | 2019-01-11 | Electroslag remelting arc striking agent and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109487091B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115635213B (en) * | 2022-12-23 | 2023-04-07 | 天津市金桥焊材科技有限公司 | Arc striking agent for welding electrode |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5441578A (en) * | 1992-07-30 | 1995-08-15 | Imphy S. A. | Method for producing soft magnetic alloys with very high permeability and alloys resulting therefrom |
| CN104726721A (en) * | 2015-02-13 | 2015-06-24 | 中钢集团邢台机械轧辊有限公司 | Electroslag ignition agent and preparation method thereof |
| CN104745831A (en) * | 2013-12-30 | 2015-07-01 | 大冶特殊钢股份有限公司 | Carbon conductive slag for electroslag steel smelting |
| CN105463200A (en) * | 2016-01-13 | 2016-04-06 | 内蒙古北方重工业集团有限公司 | Arc striking agent for electroslag remelting and arc striking method |
| CN106244819A (en) * | 2016-08-25 | 2016-12-21 | 江苏申源特钢有限公司 | A kind of striking agent of electroslag remelting and preparation method thereof |
| CN106591591A (en) * | 2017-01-13 | 2017-04-26 | 河钢股份有限公司 | Electroslag remelting solid slag arc striking agent and arcing method thereof |
-
2019
- 2019-01-11 CN CN201910026937.9A patent/CN109487091B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5441578A (en) * | 1992-07-30 | 1995-08-15 | Imphy S. A. | Method for producing soft magnetic alloys with very high permeability and alloys resulting therefrom |
| CN104745831A (en) * | 2013-12-30 | 2015-07-01 | 大冶特殊钢股份有限公司 | Carbon conductive slag for electroslag steel smelting |
| CN104726721A (en) * | 2015-02-13 | 2015-06-24 | 中钢集团邢台机械轧辊有限公司 | Electroslag ignition agent and preparation method thereof |
| CN105463200A (en) * | 2016-01-13 | 2016-04-06 | 内蒙古北方重工业集团有限公司 | Arc striking agent for electroslag remelting and arc striking method |
| CN106244819A (en) * | 2016-08-25 | 2016-12-21 | 江苏申源特钢有限公司 | A kind of striking agent of electroslag remelting and preparation method thereof |
| CN106591591A (en) * | 2017-01-13 | 2017-04-26 | 河钢股份有限公司 | Electroslag remelting solid slag arc striking agent and arcing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109487091A (en) | 2019-03-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101928847B (en) | Process for smelting magnesium alloy | |
| CN103045928A (en) | Method for producing ferrovanadium by aluminothermic process | |
| WO2018228140A1 (en) | Method for preparing ferrotitanium alloy based on aluminothermic self-propagating gradient reduction and slagging refining | |
| CN101280366A (en) | Cold melt process for secondary aluminium | |
| CN102925730A (en) | Production method of vanadium-aluminum (V-Al) alloy | |
| CN109777919A (en) | Reduce the remelting method and remelting slag system of ESR ingot oxygen content | |
| CN107964599B (en) | Straight-barrel furnace ferrovanadium smelting method capable of improving vanadium yield | |
| CN102041395A (en) | Electroslag remelting arc initiator and arcing method thereof | |
| JPWO2013187348A1 (en) | Method for producing metallic chromium | |
| CN105603257B (en) | The production method of high-quality ferrotianium | |
| CN109487091B (en) | Electroslag remelting arc striking agent and preparation method thereof | |
| CN103468864A (en) | 1Cr21Ni5Ti steel smelting method | |
| CN102559996A (en) | New silicon-aluminum-barium-calcium multicomponent deoxidation alloy for steelmaking and preparation technology thereof | |
| RU2338805C2 (en) | Method of alumino-thermal production of ferro-titanium | |
| CN1093413A (en) | Be used for ferroaluminium of aluminium killed steel deoxidation and preparation method thereof | |
| JP2001323329A (en) | Chromium containing metal and its production method | |
| CN114410976B (en) | Low-frequency electroslag remelting arc striking agent and preparation method thereof | |
| CN102839292A (en) | Aluminum iron alloy with ultra-low carbon, ultra-low titanium and high silicon contents for deoxidizing aluminum silicon killed steel and manufacturing method of aluminum iron alloy | |
| CN105803216B (en) | A kind of method for protecting titanium using slag is returned in Ti-containing steel electroslag remelting | |
| CN107841598A (en) | A kind of cast steel deoxygenated alloy and its processing method and its application method | |
| CN101230423A (en) | Method for manufacturing high-titanium ferrotitanium | |
| CN106636668A (en) | Waste electromagnetic wire copper refining agent and preparation method and application thereof | |
| RU2455379C1 (en) | Method to melt low-carbon manganiferous alloys | |
| CN105838969B (en) | The method that remelting process produces ferrotianium | |
| CN100424212C (en) | Aluminium-magnesium-iron alloy used for steel melt refining agent |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |