CN1084571A - Oxygen-blast smelting process for manufacture of steel in induction electric furnace - Google Patents
Oxygen-blast smelting process for manufacture of steel in induction electric furnace Download PDFInfo
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- CN1084571A CN1084571A CN 93109382 CN93109382A CN1084571A CN 1084571 A CN1084571 A CN 1084571A CN 93109382 CN93109382 CN 93109382 CN 93109382 A CN93109382 A CN 93109382A CN 1084571 A CN1084571 A CN 1084571A
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- oxygen
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Abstract
The invention discloses a kind of oxygen-blast smelting process for manufacture of steel in induction electric furnace, be in the induction furnace steelmaking process, with the furnace charge oxygen blast in crucible of special-purpose oxygen-blowing gun, utilize element oxidations (burning) such as carbon in the high temperature furnace charge, iron, manganese, silicon to emit a large amount of heat energy, electric energy, chemical energy utilize melting batch simultaneously like this, when molten steel height in the crucible reaches half or stops oxygen blast 2/3rds the time.This technology is fast than the prior art speed of melting, and every stove molten steel can shorten 10-20 minutes.Power consumption molten steel per ton can reduce by 200-400 degree electricity, but also can improve the quality of steel, is suitable for applying in intermediate frequency, line frequency furnace steel-making.
Description
The present invention relates to a kind of induction furnace process for making, is a kind of oxygen-blast smelting process for manufacture of steel in induction electric furnace.
Induction furnace is made up of inductor block (coil) and crucible.Can be divided into high frequency, intermediate frequency, main frequency furnace again according to power frequency in the inductor block, all be to utilize alternating magnetic field in furnace charge, to produce inductive emf, form induced current (eddy current) and be converted to the heat energy melting batch by electric energy, this method smelting time is long, power consumption is many, the temperature of slag is low, chemical property torpescence, steel of poor quality.
The purpose of this invention is to provide a kind of induction furnace steel-making oxygen novel process of fluxing of cooking a meal,, improve the number of times of coming out of the stove, reduce power consumption and reduce cost, improve the quality of steel to shorten smelting time.
The object of the present invention is achieved like this, in the induction furnace steelmaking process, when being raised to 900 ℃, charge-temperature begins with the furnace charge oxygen blast in crucible of special-purpose oxygen-blowing gun, utilize element oxidations (burning) such as carbon in the furnace charge, iron, manganese, silicon to emit a large amount of heat energy, electric energy, chemical energy utilize melting batch simultaneously like this, oxygen blast limit, limit feeds intake, when molten steel height in the crucible reaches half or stops oxygen blast 2/3rds the time.Oxygen blast pressure 10-20kg(101 * 10
4-203 * 10
4Pa).
Oxygen-blowing gun is the approximate right angle bending, and front end has straight oxygen lance, and it is inserted in the sleeve pipe by T-shaped screw retention, and the solid welding of the sleeve pipe the other end has 4 fens bend pipes, the bend pipe the other end air valve that has been threaded, the air valve opposite side 4 tap pipes that have been threaded.
During use, be connected and fixed with the band of gas one end and junction block, the other end and oxygen cylinder are connected and fixed.
This invention compared with prior art has the following advantages: (1) speed of melting is fast, and every stove molten steel can shorten 10-20 minute; (2) power consumption is low, and molten steel per ton can reduce the 200-400 degree; (3) quality of steel is good, and oxygen blast is fluxed and helped improving slag temperature and activity, helps removing gas and nonmetallic impurity in the steel.
Be described further below in conjunction with technology, accompanying drawing:
Fig. 1, oxygen-blowing gun structural representation;
Fig. 2, T-shaped screw element figure.
Among Fig. 1, oxygen lance (1) employing steel pipe or cast iron pipe, alumina tube, it is inserted in the sleeve pipe (2), with sleeve pipe (2) running fit, fixing by T-shaped screw (3), screw hole is arranged at sleeve pipe (2) bottom, itself and T-shaped screw (3) thread fit, and sleeve pipe (2) the other end and the welding of 4 fens bend pipes (4) are fixing, bend pipe (4) and air valve (5) thread fit, air valve (5) is threaded with 4 tap pipes (6), and junction block (6) the other end has platform trough, so that the fixing band of gas.
Example one, oxygen blast is fluxed in the 150kg medium-frequency induction furnace, and the oxygen blast instrument is with self-control approximate right angle bending oxygen-blowing gun, and oxygen lance adopts steel pipe.After first stove send electricity, begin oxygen blast when the 10-20kg molten steel is arranged and flux oxygen blast pressure 10kg(101 * 10 when molten in the stove
4Pa), oxygen lance ventilate earlier and afterwards is inserted in the crucible, and the aligning furnace charge blows, and oxygen blast limit, limit adds furnace charge, and the molten steel height reaches a half and stops oxygen blast in crucible, closes oxygen valve after should extracting oxygen lance earlier out, in case the generation fatal accident.
To leave the 10-15kg molten steel in the crucible of first stove molten steel tapping back, add bulk furnace charge (being no more than 20kg) then, join a little dead smalls, when rubescent about 900 ℃ of furnace charge, begin with 10kg pressure (101 * 10
4Pa) oxygen blast is fluxed, and the molten steel height in the crucible reaches half or at 2/3rds o'clock, stops oxygen blast, drive 6 stoves continuously and go out molten steel 659.6kg, power consumption 585 degree, ton steel power consumption 933.23 degree, the oxygen blast ton steel power consumption 1200-1215 degree of fluxing not, the ton steel reduces a power consumption 226.6 degree.
Example two: in the 150Kg medium-frequency induction furnace, flux since the second stove oxygen blast, used tool, and working method, pressure identical with example one, drive 8 stoves continuously, oxygen blast 7 stoves of fluxing wherein, go out molten steel 888.7Kg, power consumption 690 degree, ton steel power consumption 776.41 degree, the oxygen blast ton steel power consumption 1200-1215 degree of fluxing not, the ton steel reduces a power consumption 423.6 degree.
Example three: the used type of furnace is identical with example two with working method, drives 4 stoves continuously, oxygen blast 3 stoves of fluxing wherein, and tapping 434.1Kg, power consumption 300 degree, ton steel power consumption 691 degree, more the oxygen blast ton steel power consumption 1200-1215 degree ton steel of fluxing does not reduce a power consumption 509 degree.
According to type of furnace difference, should select different oxygen blast pressure for use, the little oxygen pressure of the type of furnace is little, and the big oxygen pressure height of the type of furnace generally is controlled at 10-20kg(101 * 10
4-203 * 10
4Pa), can select for use 1-2 to prop up the oxygen-blowing gun oxygen blast according to the flow of oxygen situation fluxes.
Claims (3)
1, a kind of oxygen-blast smelting process for manufacture of steel in induction electric furnace is characterized in that: begin with special-purpose oxygen-blowing gun to the oxygen blast of crucible furnace charge oxygen blast pressure 10-20kg (101 * 10 in the induction furnace steelmaking process when charge-temperature is raised to 900 ℃
4-203 * 10
4Pa) utilize element oxidations (burning) such as carbon in the furnace charge, iron, manganese, silicon to emit a large amount of heat energy, electric energy, chemical energy utilize melting batch simultaneously like this, and oxygen blast limit, limit feeds intake, when molten steel height in the crucible reaches half or stops oxygen blast 2/3rds the time.
2, the described oxygen blast of claim 1 novel process of fluxing, used oxygen-blowing gun is characterized in that: oxygen-blowing gun is the approximate right angle bending, front end has straight oxygen lance (1), it is inserted in the sleeve pipe (2), fixing by T-shaped screw (3), the intrinsic bend pipe of sleeve pipe (2) the other end (4), bend pipe (4) the other end air valve (5) that has been threaded, air valve (5) the opposite side junction block (6) that has been threaded.
3, oxygen-blowing gun according to claim 1 is characterized in that: oxygen lance (1) employing steel pipe or alumina tube, cast iron pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93109382 CN1084571A (en) | 1993-07-29 | 1993-07-29 | Oxygen-blast smelting process for manufacture of steel in induction electric furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93109382 CN1084571A (en) | 1993-07-29 | 1993-07-29 | Oxygen-blast smelting process for manufacture of steel in induction electric furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1084571A true CN1084571A (en) | 1994-03-30 |
Family
ID=4987591
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93109382 Pending CN1084571A (en) | 1993-07-29 | 1993-07-29 | Oxygen-blast smelting process for manufacture of steel in induction electric furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1084571A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102041349A (en) * | 2010-12-22 | 2011-05-04 | 本钢板材股份有限公司 | Method for smelting steel by adopting induction furnace |
| CN101709351B (en) * | 2009-11-28 | 2011-06-01 | 山西太钢不锈钢股份有限公司 | Method for oxygen blast of electric furnace |
| CN112593049A (en) * | 2020-10-28 | 2021-04-02 | 安徽钢研新材料科技有限公司 | Method for blowing oxygen to decarbonize from intermediate frequency furnace top |
-
1993
- 1993-07-29 CN CN 93109382 patent/CN1084571A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101709351B (en) * | 2009-11-28 | 2011-06-01 | 山西太钢不锈钢股份有限公司 | Method for oxygen blast of electric furnace |
| CN102041349A (en) * | 2010-12-22 | 2011-05-04 | 本钢板材股份有限公司 | Method for smelting steel by adopting induction furnace |
| CN112593049A (en) * | 2020-10-28 | 2021-04-02 | 安徽钢研新材料科技有限公司 | Method for blowing oxygen to decarbonize from intermediate frequency furnace top |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |