CN101914652A - Low-carbon and low-silicon steel deoxidation process - Google Patents
Low-carbon and low-silicon steel deoxidation process Download PDFInfo
- Publication number
- CN101914652A CN101914652A CN 201010267141 CN201010267141A CN101914652A CN 101914652 A CN101914652 A CN 101914652A CN 201010267141 CN201010267141 CN 201010267141 CN 201010267141 A CN201010267141 A CN 201010267141A CN 101914652 A CN101914652 A CN 101914652A
- Authority
- CN
- China
- Prior art keywords
- steel
- argon
- deoxidation
- carbon
- 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.)
- Pending
Links
Abstract
The invention relates to a low-carbon and low-silicon steel deoxidation process, comprising the following process flow: converter taping: tapping when the content of oxygen at the end point of the converter is over 500ppm; adding carbon powder at the beginning of the tapping for rough deoxidation, measured by the carbon dust of 0.15-0.25kgper ton of steel; adding aluminum iron for deoxidation alloying when the tapping is carried out to be 1/2 or 2/3, measured by the aluminum iron of 1.5-2.5kg/t steel; opening a steel ladle to an argon flushing station; supplementing aluminum iron: measuring the oxygen content of the steel ladle by using an oxygen probe, supplementing aluminum iron according to the measured oxygen content and adjusting the content of the oxygen of the steel ladle to be less than 50ppm; and flushing argon at the beginning of tapping at the flow of 300-400NL/min and adjusting the flow of bottom blowing argon gas to be 50-80NL/min when the steel ladle is opened to the argon flushing station for softly blowing argon. By using the carbon powder to deoxidize instead of the aluminum iron, the invention not only saves the cost of alloy, but also improves the purity of molten steel.
Description
Technical field
The invention belongs to deoxidation and processing method thereof when tapping in the converter smelting production process, be specifically related to a kind of low-carbon and low-silicon steel deoxidation process.
Background technology
The deoxidation operation of converter steelmaking process is the key link of control oxygen content in steel.The tradition deoxidization technique adopts silicon in the alloy, aluminium and the reaction of steel water oxygen, generates nonmetallic compound, removes by means such as Argon, calmness, refinings more as far as possible.But still have the residual formation inclusion of part nonmetallic compound inevitably and pollute molten steel, it is the principal element that influences the purity and the steel product quality of steel.And for carbon aluminium-killed steels such as smelting SPHC, domestic manufacturer all adopts tapping aluminum deoxidation technology controlling and process molten steel oxygen level.Because the interior carbon oxygen of converter is long-pending to be relatively-stationary, and the smelting endpoint carbon ratio is lower,, cause consuming a large amount of ferro-aluminums, produced simultaneously Al so terminal point oxygen usually can be higher
2O
3In the residual molten steel, can increase the burden of subsequent fine furnace.In case deal with improperly, then can cause the high Al of molten steel
2O
3Content stops up the mouth of a river in casting process, perhaps quality product is formed influence, and serious surface quality defect appears in the following process process.
Summary of the invention
The present invention is intended to solve tradition and smelts production soft steel deoxidization technique employing aluminum deoxidation, not only consume a large amount of aluminium-containing alloies or metal aluminium ingot, and the deoxidation products that forms is difficult to remove in subsequent processes, a large amount of deoxidation productss remains in and easily causes wadding stream industrial accident in the molten steel or cause the serious surface quality problems of the finished product, replace the ferro-aluminum deoxidation and provide a kind of with carbon dust, not only save cost of alloy, and improve the low-carbon and low-silicon steel deoxidation process of molten steel purity.
The technical scheme that the present invention solves described problem employing is: a kind of low-carbon and low-silicon steel deoxidation process, undertaken by following operating process:
A. converter tapping: the converter terminal oxygen level is tapped when 500ppm is above;
Add the thick deoxidation of carbon dust when b. beginning to tap: press the metering of carbon dust 0.15～0.25kg/ ton steel, add carbon dust and carry out thick deoxidation;
C. tap 1/2 or added ferro-aluminum at 2/3 o'clock and carry out deoxidation alloying: press the metering of ferro-aluminum 1.5～2.5kg/ ton steel, the adding ferro-aluminum carries out deoxidation alloying;
D. molten steel is unwrapped to the Argon station;
E. add ferro-aluminum: measure the ladle oxygen level with Determining oxygen probe, add ferro-aluminum, adjust the ladle oxygen level below 50ppm according to measuring oxygen level;
F. Argon: begin to carry out Argon from tapping, flow is 300～400NL/min, adjusts argon bottom-blowing flow 50～80NL/min and carry out the soft blow argon when molten steel is unwrapped to the Argon station.
Among the present invention, before beginning tapping, carbon dust is added ladle bottom molten steel is carried out thick deoxidation, oxygen in the molten steel and carbon dust reaction generate CO (carbon monoxide converter) gas, and CO (carbon monoxide converter) gas can promote the come-up of impurity in the molten steel in the effusion process in molten steel, improve the molten steel purity; And reduce the ferro-aluminum consumption and can reduce AL
2O
3The generation of impurity reduces the generation of stopping up mouth of a river phenomenon in the casting process; And CaO and basicity have raising in various degree, SiO in the ladle slag of use carbon dust
2, AL
2O
3With FeO certain decline is arranged, MnO and MgO remain unchanged substantially, help the slag making operation of LF stove.
Compared with prior art, unusual effect of the present invention and technical characterstic are summarized as follows:
The present invention adopts the metallurgical thermodynamics principle, utilizes carbon and oxygen balance relation in the converter smelting tapping process, uses ature of coal carburelant (carbon content 96%) to remove part molten steel oxygen in the soft steel production process, and molten steel composition especially carbon content is not impacted.Reaction between carbon and oxygen production CO gas floats in molten steel and diffuses in the air, steel quality is not had any pollution, and the ature of coal carburelant is cheap, can reduce production costs greatly behind the alternative part aluminium alloy.
Embodiment
Below in conjunction with embodiment in detail the present invention is described in detail:
In the present embodiment, the converter tapping amount is 125 tons, 1620 ℃ of converter terminal temperature, terminal point oxygen 600ppm, end point carbon 0.05%; Add carbon dust 20kg (by carbon dust 0.16kg/ ton steel) during converter tapping, after add ferro-aluminum 200kg (by ferro-aluminum 1.6kg/ ton steel), Argon station argon gas stirs 1578 ℃ of back ladle temperature, ladle oxygen 20ppm, ladle carbon 0.05%; Tapping beginning argon blowing rate is 350NL/min, and molten steel is unwrapped argon bottom-blowing flow 60NL/min to the Argon station.
The present embodiment effect: the SPHC steel grade reduces ferro-aluminum 0.235kg/t, carbon dust consumption increases 0.16kg/t, according to 9550 yuan/ton of ferro-aluminum unit prices, 1538 yuan of/ton calculating of carbon dust, the ton steel is saved cost: 0.235kg/t * 9550 yuan/ton-0.16kg/t * 1538 yuan/ton=2 yuan/ton, according to producing 2200000 tons of calculating per year, 4,400,000 yuan of year wound benefits.
Claims (1)
1. low-carbon and low-silicon steel deoxidation process, undertaken by following operating process:
A. converter tapping: the converter terminal oxygen level is tapped when 500ppm is above;
Add the thick deoxidation of carbon dust when b. beginning to tap: press the metering of carbon dust 0.15～0.25kg/ ton steel, add carbon dust and carry out thick deoxidation;
C. tap 1/2 or added ferro-aluminum at 2/3 o'clock and carry out deoxidation alloying: press the metering of ferro-aluminum 1.5～2.5kg/ ton steel, the adding ferro-aluminum carries out deoxidation alloying;
D. molten steel is unwrapped to the Argon station;
E. add ferro-aluminum: measure the ladle oxygen level with Determining oxygen probe, add ferro-aluminum, adjust the ladle oxygen level below 50ppm according to measuring oxygen level;
F. Argon: begin to carry out Argon from tapping, flow is 300～400NL/min, adjusts argon bottom-blowing flow 50～80NL/min and carry out the soft blow argon when molten steel is unwrapped to the Argon station.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010267141 CN101914652A (en) | 2010-08-27 | 2010-08-27 | Low-carbon and low-silicon steel deoxidation process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010267141 CN101914652A (en) | 2010-08-27 | 2010-08-27 | Low-carbon and low-silicon steel deoxidation process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101914652A true CN101914652A (en) | 2010-12-15 |
Family
ID=43322288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010267141 Pending CN101914652A (en) | 2010-08-27 | 2010-08-27 | Low-carbon and low-silicon steel deoxidation process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101914652A (en) |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102321778A (en) * | 2011-09-22 | 2012-01-18 | 首钢总公司 | Method of deoxidation of medium carbon aluminum-containing steel in converter |
| CN102634641A (en) * | 2012-05-11 | 2012-08-15 | 武汉钢铁(集团)公司 | Deoxidation method for converter tapping molten steel |
| CN102719602A (en) * | 2012-06-26 | 2012-10-10 | 山西太钢不锈钢股份有限公司 | Clean steel-refining slagging method |
| CN102851435A (en) * | 2012-09-12 | 2013-01-02 | 首钢总公司 | Ultra-low-carbon, low-silicon and low-oxygen steel and smelting method thereof |
| CN103014241A (en) * | 2012-03-16 | 2013-04-03 | 新疆八一钢铁股份有限公司 | Control method of smelting slag of SPHD steel for LF (Ladle Furnace) furnace |
| CN103014235A (en) * | 2013-01-07 | 2013-04-03 | 河北钢铁股份有限公司唐山分公司 | Deoxidizing process for reducing consumption of aluminum killed steel deoxidizing agent |
| CN103388052A (en) * | 2013-08-08 | 2013-11-13 | 山西太钢不锈钢股份有限公司 | Production method of deoxidizing low-silicon steel by adding silicon-containing alloy |
| CN103911480A (en) * | 2014-01-06 | 2014-07-09 | 新疆八一钢铁股份有限公司 | Deoxidation production technology for smelting H08MnA steel |
| CN104060053A (en) * | 2013-10-24 | 2014-09-24 | 攀钢集团攀枝花钢铁研究院有限公司 | Low alloy steel production method |
| CN104561444A (en) * | 2014-12-22 | 2015-04-29 | 武汉钢铁(集团)公司 | Method for removing excessive oxygen in steel tapping process of low-carbon aluminum killed steel |
| CN105710329A (en) * | 2014-12-01 | 2016-06-29 | 鞍钢股份有限公司 | Method for restraining pouring flocculation flow of medium-high-carbon steel |
| CN107012285A (en) * | 2017-05-03 | 2017-08-04 | 唐山国丰钢铁有限公司 | A kind of inexpensive deoxidization technique of converter mild steel tapping process |
| CN107779549A (en) * | 2016-08-31 | 2018-03-09 | 河南凤宝特钢有限公司 | A kind of steelmaking converter deoxidization technique |
| CN109468432A (en) * | 2018-12-18 | 2019-03-15 | 南京钢铁股份有限公司 | A kind of method of deoxidation being suitable for carbon aluminium-killed steel |
| CN109880972A (en) * | 2019-04-01 | 2019-06-14 | 山东钢铁集团日照有限公司 | A kind of SPHC low-carbon class steel grade production technology |
| CN112375864A (en) * | 2020-11-16 | 2021-02-19 | 南京钢铁股份有限公司 | Slag modification method for last stage of converter tapping |
| CN115287403A (en) * | 2022-08-15 | 2022-11-04 | 广东韶钢松山股份有限公司 | Low-carbon low-silicon cold heading steel deoxidation method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004307942A (en) * | 2003-04-08 | 2004-11-04 | Nippon Steel Corp | Method for producing extra-low titanium molten steel |
| CN1966752A (en) * | 2006-02-11 | 2007-05-23 | 湖南华菱涟源钢铁有限公司 | Process for producing C-Mn-Al killed steel |
| CN101157965A (en) * | 2007-11-08 | 2008-04-09 | 广州珠江钢铁有限责任公司 | Low-cost arc furnace tapping deoxidization technique |
-
2010
- 2010-08-27 CN CN 201010267141 patent/CN101914652A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004307942A (en) * | 2003-04-08 | 2004-11-04 | Nippon Steel Corp | Method for producing extra-low titanium molten steel |
| CN1966752A (en) * | 2006-02-11 | 2007-05-23 | 湖南华菱涟源钢铁有限公司 | Process for producing C-Mn-Al killed steel |
| CN101157965A (en) * | 2007-11-08 | 2008-04-09 | 广州珠江钢铁有限责任公司 | Low-cost arc furnace tapping deoxidization technique |
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102321778A (en) * | 2011-09-22 | 2012-01-18 | 首钢总公司 | Method of deoxidation of medium carbon aluminum-containing steel in converter |
| CN103014241A (en) * | 2012-03-16 | 2013-04-03 | 新疆八一钢铁股份有限公司 | Control method of smelting slag of SPHD steel for LF (Ladle Furnace) furnace |
| CN102634641A (en) * | 2012-05-11 | 2012-08-15 | 武汉钢铁(集团)公司 | Deoxidation method for converter tapping molten steel |
| CN102719602A (en) * | 2012-06-26 | 2012-10-10 | 山西太钢不锈钢股份有限公司 | Clean steel-refining slagging method |
| CN102851435B (en) * | 2012-09-12 | 2014-08-27 | 首钢总公司 | Ultra-low-carbon, low-silicon and low-oxygen steel and smelting method thereof |
| CN102851435A (en) * | 2012-09-12 | 2013-01-02 | 首钢总公司 | Ultra-low-carbon, low-silicon and low-oxygen steel and smelting method thereof |
| CN103014235A (en) * | 2013-01-07 | 2013-04-03 | 河北钢铁股份有限公司唐山分公司 | Deoxidizing process for reducing consumption of aluminum killed steel deoxidizing agent |
| CN103014235B (en) * | 2013-01-07 | 2014-07-02 | 河北钢铁股份有限公司唐山分公司 | Deoxidizing process for reducing consumption of aluminum killed steel deoxidizing agent |
| CN103388052A (en) * | 2013-08-08 | 2013-11-13 | 山西太钢不锈钢股份有限公司 | Production method of deoxidizing low-silicon steel by adding silicon-containing alloy |
| CN104060053A (en) * | 2013-10-24 | 2014-09-24 | 攀钢集团攀枝花钢铁研究院有限公司 | Low alloy steel production method |
| CN104060053B (en) * | 2013-10-24 | 2016-02-03 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of method of producing low alloy steel |
| CN103911480A (en) * | 2014-01-06 | 2014-07-09 | 新疆八一钢铁股份有限公司 | Deoxidation production technology for smelting H08MnA steel |
| CN105710329A (en) * | 2014-12-01 | 2016-06-29 | 鞍钢股份有限公司 | Method for restraining pouring flocculation flow of medium-high-carbon steel |
| CN105710329B (en) * | 2014-12-01 | 2017-09-12 | 鞍钢股份有限公司 | A kind of method for suppressing medium and high carbon steel cast wadding stream |
| CN104561444A (en) * | 2014-12-22 | 2015-04-29 | 武汉钢铁(集团)公司 | Method for removing excessive oxygen in steel tapping process of low-carbon aluminum killed steel |
| CN107779549A (en) * | 2016-08-31 | 2018-03-09 | 河南凤宝特钢有限公司 | A kind of steelmaking converter deoxidization technique |
| CN107012285A (en) * | 2017-05-03 | 2017-08-04 | 唐山国丰钢铁有限公司 | A kind of inexpensive deoxidization technique of converter mild steel tapping process |
| CN109468432A (en) * | 2018-12-18 | 2019-03-15 | 南京钢铁股份有限公司 | A kind of method of deoxidation being suitable for carbon aluminium-killed steel |
| CN109880972A (en) * | 2019-04-01 | 2019-06-14 | 山东钢铁集团日照有限公司 | A kind of SPHC low-carbon class steel grade production technology |
| CN112375864A (en) * | 2020-11-16 | 2021-02-19 | 南京钢铁股份有限公司 | Slag modification method for last stage of converter tapping |
| CN115287403A (en) * | 2022-08-15 | 2022-11-04 | 广东韶钢松山股份有限公司 | Low-carbon low-silicon cold heading steel deoxidation method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101914652A (en) | Low-carbon and low-silicon steel deoxidation process | |
| CN111500815B (en) | Bottom blowing O2-CO2Dynamic control method for steelmaking process of CaO converter | |
| CN103451349B (en) | Control method for preventing nozzle clogging in casting process of ultra-low carbon-aluminium deoxidized molten steel | |
| CN102586685B (en) | Smelting process of steel for high-titanium alloy welding wire | |
| CN102069157B (en) | Method for preparing high-aluminum steel | |
| CN101760581B (en) | Production process for smelting high-level low-carbon steel at low cost | |
| KR20130025383A (en) | Method for controlling titanium content in ultra-low carbon killed steel | |
| CN101580912A (en) | Low carbon high sulfur free-cutting steel production process | |
| CN103060513A (en) | Method for smelting tire cord steel and method for continuously casting tire cord steel | |
| CN110724787A (en) | Smelting method of sulfur-containing and aluminum-containing steel | |
| CN111455125B (en) | Production method for increasing continuous casting heat of high-aluminum steel | |
| CN102851447B (en) | Outside-furnace refining production method of steel used in carbon steel welding wire | |
| CN104212935A (en) | Method for producing high-grade GCr15 bearing steel by using high-titanium chrome iron | |
| CN102329917B (en) | Production method of clean steel | |
| CN108913836A (en) | The production method of welding rod steel H08A | |
| EP4215627A1 (en) | Low-cost smelting method for polar-use steel using ultra-high phosphorus molten iron | |
| CN102787206B (en) | Smelting method for controlling nitrogen content in steel ingot of medium carbon chromous mold steel and steel ingot | |
| CN103014235B (en) | Deoxidizing process for reducing consumption of aluminum killed steel deoxidizing agent | |
| CN108148941B (en) | Smelting method of ultra-low boron steel | |
| CN114410890B (en) | Slag forming process of extremely-low aluminum railway rail steel | |
| CN107012285A (en) | A kind of inexpensive deoxidization technique of converter mild steel tapping process | |
| CN102634628A (en) | Optimization method for producing low-oxygen steel by converter | |
| CN103468851A (en) | Nitrogen control method of converter in less slag smelting mode | |
| CN110564916B (en) | Method for shortening refining time of SPHC steel grade | |
| CN111020111A (en) | Smelting method of low-C and low-Si steel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20101215 |