CN102796844A - Steelmaking technology adopting protective gas and special medium-frequency electric furnace - Google Patents
Steelmaking technology adopting protective gas and special medium-frequency electric furnace Download PDFInfo
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- CN102796844A CN102796844A CN2012103359110A CN201210335911A CN102796844A CN 102796844 A CN102796844 A CN 102796844A CN 2012103359110 A CN2012103359110 A CN 2012103359110A CN 201210335911 A CN201210335911 A CN 201210335911A CN 102796844 A CN102796844 A CN 102796844A
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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
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Abstract
The invention belongs to the field of iron and steel smelting, and in particular relates to a steelmaking technology adopting protective gas and a special medium-frequency electric furnace. The steelmaking technology is characterized in that during a process that raw materials are smelted into liquid steel in the medium-frequency electric furnace, the protection gas is fed into the relatively-sealed medium-frequency electric furnace until the protective gas fills the part above the liquid level in the medium-frequency electric furnace, wherein the protective gas can be inert gas or gas which cannot react with the liquid steel and can isolate oxygen. The steelmaking technology and the special medium-frequency electric furnace have the beneficial effects that as the inert gas protecting the liquid steel from air oxidation is fed into the medium-frequency electric furnace during the smelting process, the content of impurities in steel is reduced, and the quality of the steel is improved.
Description
Technical field
The invention belongs to field of iron and steel smelting, be specifically related to a kind of technology that adopts protective gas steel-making, also relate in this technology special-purpose middle frequency furnace.
Background technology
In smelting iron and steel, the equipment that often adopts is middle frequency furnace, and this electric furnace comprises body of heater and the tapping spout that is positioned at sidewall of the furnace body; When iron and steel is smelted; Raw material is placed middle frequency furnace, and when raw material was fused into molten steel, the molten steel surface can produce one deck slag; This layer slag isolated air and molten steel, and the molten steel in the protection middle frequency furnace is avoided the oxidation of air.Above smelting mode has accurate composition control, the advantage that temperature is adjustable, thereby be widely used in industries such as machinery, casting.The shortcoming of this smelting process is, can not carry out the gas shield operation, oxidized slag and then can the oxidation molten steel, even under the few situation of not having a slag of slag, metallurgical system is oxidized, inclusion increases thereupon, the infringement smelting quality.
The method that can avoid this inferior position is to make this intermediate frequency furnace addition of vacuum degassing equipment, is commonly referred to the vacuum intermediate frequency furnace, have the vacuum guaranteeing role, but the shortcoming of this vacuum oven is to have high input, and support equipment is complicated, and is difficult in maintenance, thereby cost increases; The vacuum intermediate frequency furnace also has tonnage to yield poorly for a short time, weak points such as cast link weakness.Therefore need to improve to above-mentioned smelting mode and smelting equipment, the iron and steel that smelting is come out has higher quality.
Summary of the invention
In order to solve above-mentioned technical problem, the invention provides a kind of technology that adopts protective gas steel-making, adopt rare gas element that molten steel is protected in this technology, completely cut off the entering of air, thereby reduced the inclusion that produces in the smelting process;
The present invention also provides middle frequency furnace special-purpose in more than one smelting modes, feeds rare gas element in the body of heater through this electric furnace in the past, avoids the oxidation of air with the protection molten steel, thereby the quality of iron and steel is provided.
A kind of technology that adopts protective gas steel-making; This technology comprises following step: raw material is fused in middle frequency furnace in the process of molten steel; In the middle frequency furnace of relative sealing, feed protective gas; Make protective gas riddle the liquid level top of middle frequency furnace, described protective gas is rare gas element or does not react the also gas of ability starvation with molten steel.
Preferably, above-mentioned protective gas is argon gas or nitrogen.
Preferred, above-mentioned protective gas is an argon gas; Nitrogen also can be selected for use under the situation that technology allows as a kind of gas of getting rid of oxygen, in concrete technology, can according to circumstances select.
Above-mentioned middle frequency furnace comprises body of heater and the tapping spout that is positioned at sidewall of the furnace body; Middle frequency furnace also comprises the sealing cover that matches with body of heater; The ventilating pit that supplies rare gas element to get into is arranged on the sealing cover, also have vision slit on the sealing cover, this vision slit has stopper with matching.
Beneficial effect of the present invention is; Adopted above-mentioned smelting mode and special-purpose middle frequency furnace to come to smelting iron and steel; In the process of smelting, feed the protection molten steel and avoided the rare gas element of atmospheric oxidation, thereby reduced the content of inclusion in the iron and steel, improved the quality of iron and steel.
Description of drawings
Fig. 1 is its structural representation of middle frequency furnace of the present invention;
Fig. 2 is the synoptic diagram of the working order of middle frequency furnace of the present invention;
Among the figure, 1-body of heater, 2-sealing cover, 3-ventilating pit, 4-vision slit, 5-stopper, 6-tapping spout, 7-slag, 8-molten steel.
Embodiment
Come the present invention is done explanation further below in conjunction with accompanying drawing and embodiment,, but do not limit the present invention with this so that those skilled in the art more understands the present invention.
Embodiment 1
A kind of technology that adopts protective gas steel-making, this technology comprises following step: raw material is fused in middle frequency furnace in the process of molten steel, in the middle frequency furnace of relative sealing, feeds argon gas, makes argon gas riddle the liquid level top of middle frequency furnace.
Used middle frequency furnace comprises body of heater 1 and the tapping spout 6 that is positioned at body of heater 1 sidewall in above technology; Middle frequency furnace also comprises the sealing cover 2 that matches with body of heater 1; The ventilating pit 3 that supplies argon gas to get into is arranged on the sealing cover 2; Also have vision slit 4 on the sealing cover 2, this vision slit 4 has stopper 5 with matching, and the staff can see through the molten steel fusing situation that vision slit 4 is observed body of heater 1 inside.
Be that with the difference of embodiment 1 gas that adopts in the present embodiment is nitrogen, remaining is just the same.
Claims (4)
1. technology that adopts protective gas steel-making; It is characterized in that: raw material is fused in middle frequency furnace in the process of molten steel; In the middle frequency furnace of relative sealing, feed protective gas; Make protective gas riddle the liquid level top of middle frequency furnace, described protective gas is rare gas element or does not react the also gas of ability starvation with molten steel.
2. a kind of technology that adopts protective gas steel-making as claimed in claim 1 is characterized in that described protective gas is argon gas or nitrogen.
3. according to claim 1 or claim 2 a kind of adopts the technology of protective gas steel-making, it is characterized in that described protective gas is an argon gas.
4. special-purpose middle frequency furnace in a kind of technology that adopts protective gas steel-making as claimed in claim 1; Described middle frequency furnace comprises body of heater and the tapping spout that is positioned at sidewall of the furnace body; It is characterized in that described middle frequency furnace also comprises the sealing cover that matches with body of heater, the ventilating pit that supplies rare gas element to get into is arranged on the described sealing cover; Also have vision slit on the described sealing cover, this vision slit has stopper with matching.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103359110A CN102796844A (en) | 2012-09-12 | 2012-09-12 | Steelmaking technology adopting protective gas and special medium-frequency electric furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103359110A CN102796844A (en) | 2012-09-12 | 2012-09-12 | Steelmaking technology adopting protective gas and special medium-frequency electric furnace |
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| Publication Number | Publication Date |
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| CN102796844A true CN102796844A (en) | 2012-11-28 |
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| CN2012103359110A Pending CN102796844A (en) | 2012-09-12 | 2012-09-12 | Steelmaking technology adopting protective gas and special medium-frequency electric furnace |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108085454A (en) * | 2017-12-20 | 2018-05-29 | 中钢集团邢台机械轧辊有限公司 | A kind of arc furnace steelmaking process |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1077751A (en) * | 1993-03-02 | 1993-10-27 | 李吉柱 | A kind of steel-making of intermediate frequency furnace method |
| CN101226701A (en) * | 2007-12-28 | 2008-07-23 | 东北大学 | Dual-roller thin-belt casting rolling analog equipment as well as usage and control method thereof |
| CN101487105A (en) * | 2009-02-27 | 2009-07-22 | 东北大学 | Surface inverse segregation phosphor high phosphor weather resistant steel castings thin belt and manufacture method thereof |
| CN101693938A (en) * | 2009-09-30 | 2010-04-14 | 山西太钢不锈钢股份有限公司 | Molten steel protection method of intermediate frequency induction furnace |
| CN102560003A (en) * | 2012-01-29 | 2012-07-11 | 北京科技大学 | Method for preventing nitrogen increase of molten steel in LF (Ladle Furnace) refining process by top-blowing argon gas |
-
2012
- 2012-09-12 CN CN2012103359110A patent/CN102796844A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1077751A (en) * | 1993-03-02 | 1993-10-27 | 李吉柱 | A kind of steel-making of intermediate frequency furnace method |
| CN101226701A (en) * | 2007-12-28 | 2008-07-23 | 东北大学 | Dual-roller thin-belt casting rolling analog equipment as well as usage and control method thereof |
| CN101487105A (en) * | 2009-02-27 | 2009-07-22 | 东北大学 | Surface inverse segregation phosphor high phosphor weather resistant steel castings thin belt and manufacture method thereof |
| CN101693938A (en) * | 2009-09-30 | 2010-04-14 | 山西太钢不锈钢股份有限公司 | Molten steel protection method of intermediate frequency induction furnace |
| CN102560003A (en) * | 2012-01-29 | 2012-07-11 | 北京科技大学 | Method for preventing nitrogen increase of molten steel in LF (Ladle Furnace) refining process by top-blowing argon gas |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108085454A (en) * | 2017-12-20 | 2018-05-29 | 中钢集团邢台机械轧辊有限公司 | A kind of arc furnace steelmaking process |
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Application publication date: 20121128 |