CN106893800A - A kind of method of deoxidation - Google Patents
A kind of method of deoxidation Download PDFInfo
- Publication number
- CN106893800A CN106893800A CN201710219307.4A CN201710219307A CN106893800A CN 106893800 A CN106893800 A CN 106893800A CN 201710219307 A CN201710219307 A CN 201710219307A CN 106893800 A CN106893800 A CN 106893800A
- Authority
- CN
- China
- Prior art keywords
- carbon dust
- total amount
- refining furnaces
- addition total
- station
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/06—Deoxidising, e.g. killing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0025—Adding carbon material
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0037—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 by injecting powdered material
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/10—Handling in a vacuum
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention discloses a kind of method of deoxidation, in order to reduce the Al generated using aluminum shot deoxidation2O3The problem being mingled with, present invention uses carbon dust deoxy technology, first determines the addition total amount of carbon dust；Then the vacuum of control RH refining furnaces is to 170 190mbar；According to the addition total amount of the carbon dust, the carbon dust is set to add in batches to the RH refining furnaces, and then cause the carbon dust and the RH refining furnaces in molten steel in oxygen reacted, generation CO gas or carbon dioxide, so the present invention does not only reach the purpose of oxygen activity before reduction plus aluminium, the consumption of aluminum products is reduced, and deoxidation products is CO, the noresidue in molten steel, has reached the purpose for not only reducing production cost but also improve product quality.
Description
Technical field
The application is related to metallurgical technology field, more particularly to a kind of method of deoxidation.
Background technology
Current steel market industry is low, allows of no optimist, and how to be produced using reduces cost and meets client's rigors
The huge difficult problem that is faced into iron and steel enterprise of high quality of products.
It is conventional treated in RH refining furnaces (Ruhstahl Hausen, a kind of vacuum decarburization of steel-making, deaerate method) vacuum
Cheng Zhong, it is general to use aluminium deoxidation technique, the oxygen in molten steel is changed into Al2O3Field trash, and promoted using vacuum and soft blow treatment
Inclusion floating is excluded.
In this process, not only need to consume substantial amounts of aluminum shot, simultaneously because deoxidation produces substantial amounts of Al2O3Field trash,
Al2O3It is the one of the main reasons for influenceing molten steel cleanness to be mingled with, while Al2O3It is mixed in deposit to easily cause on the resistance to material in the mouth of a river and pours
Nozzle clogging produces nozzle blocking during casting, influences end product quality.
So, how RH refining furnace vacuum refinings enter the station C hypoxemia it is high when, reduce Al deoxidation so as to reduce Al2O3It is mingled with
It is current urgent problem.
The content of the invention
Invention provides a kind of method of deoxidation, to solve how to reduce by Al deoxidation so as to reduce Al2O3The skill being mingled with
Art problem.
In order to solve the above technical problems, the invention provides a kind of method of deoxidation, methods described includes：
Determine the addition total amount of carbon dust；
The vacuum of control steel-making RH refining furnaces is to 170-190mbar；
According to the addition total amount of the carbon dust, the carbon dust is added in batches to the RH refining furnaces, and then cause institute
The oxygen stated in the molten steel in carbon dust and the RH refining furnaces is reacted, and generates CO gas or carbon dioxide,
Discharge the RH refining furnaces.
Preferably, the addition total amount for determining carbon dust, including：
Detection RH arrives at a station oxygen content；
The addition total amount of the carbon dust is determined based on the oxygen content of arriving at a station.
Preferably, the addition total amount that the carbon dust is determined based on the oxygen content of arriving at a station, including：
When the oxygen content of arriving at a station is for 550-600ppm, the addition total amount of the carbon dust is：18-22kg；
When the oxygen content of arriving at a station is for 600-650ppm, the addition total amount of the carbon dust is：28-32kg；
When the oxygen content of arriving at a station is for 650-700ppm, the addition total amount of the carbon dust is：38-42kg；
When the oxygen content of arriving at a station is more than 700, the addition total amount of the carbon dust is：42-46kg.
Preferably, the addition total amount according to the carbon dust, makes the carbon dust add in batches to the RH refining furnaces,
Including：
Addition total amount based on the carbon dust, the RH refining furnaces are added by the carbon dust by batch, per batch addition
≤ 15kg, the interval between two neighboring batch adds the time in 10-15s.
Preferably, the addition total amount according to the carbon dust, makes the carbon dust add in batches to the RH refining furnaces
Afterwards, methods described also includes：
Control the recyclegas flow of the RH refining furnaces.
Preferably, the recyclegas flow of the control RH refining furnaces, including：
When adding the carbon dust first, circulating air flow is controlled in 1100-1300Nl/min；
After adding the carbon dust to be spaced a preset time period first, the circulating air flow control is in 1400-
1600Nl/min；
Decarburization terminates the rear circulating air flow control in 1600-1800Nl/min.
Preferably, the preset time period is 18-22s.
Preferably, the addition total amount according to the carbon dust, makes the carbon dust add in batches to the RH refining furnaces
Afterwards, methods described also includes：
The vacuum for controlling the RH refining furnaces is 40-50mbar.
By one or more technical scheme of the invention, the invention has the advantages that or advantage：
The invention discloses a kind of method of deoxidation, in order to reduce the Al generated using aluminum shot deoxidation2O3The problem being mingled with,
Present invention uses carbon dust deoxy technology, the addition total amount of carbon dust is determined；Then the vacuum of control RH refining furnaces is to 170-
190mbar；According to the addition total amount of the carbon dust, the carbon dust is added in batches to the RH refining furnaces, and then cause institute
The oxygen stated in the molten steel in carbon dust and the RH refining furnaces is reacted, and generates CO gas or carbon dioxide,
So the present invention does not only reach the purpose of oxygen activity before reduction plus aluminium, the consumption of aluminum products is reduced, and deoxidation products is CO,
The noresidue in molten steel, has reached the purpose for not only reducing production cost but also improve product quality.
Brief description of the drawings
Fig. 1 is a kind of flow chart of method of deoxidation in the embodiment of the present invention.
Specific embodiment
In order that the application the technical staff in the technical field is more clearly understood that the application, below in conjunction with the accompanying drawings,
Technical scheme is described in detail by specific embodiment.
Converter current receives the working of a furnace, the type of furnace, blows again, mends the conditions such as furnace retaining, post operation, sublance model, steel scrap, supplementary material
Influence, terminal point control is simultaneously unstable, and carbon hypoxemia situation high happens occasionally, and certainly will so consume substantial amounts of aluminum shot deoxidation, will produce
The substantial amounts of Al of life2O3Field trash is unfavorable to control foreign substance in molten steel.
Therefore for there is such situation heat, vacuum plus carbon dust deoxy technology are developed, under vacuum, by adding
Plus the mode of carbon dust, carbon dust is reacted with [O] in molten steel, the purpose of oxygen activity before reduction plus aluminium is not only reached, reduce aluminium
The consumption of product, and deoxidation products is CO, and the noresidue in molten steel has reached and not only reduce production cost but also improve product quality
Purpose.
The present invention according to RH refining furnaces enter the station carbon hypoxemia heat higher (C ＜ 0.03%, O ＞ 0.055%) reduce Al it is de-
Oxygen and reduce Al2O3The generation being mingled with, proposes a kind of method of deoxidation.
In specific implementation process, method of deoxidation of the invention includes：
Step 11, determines the addition total amount of carbon dust.
In specific implementation process, the present invention needs first to determine that detection RH arrives at a station oxygen content；Then arrived based on described again
Oxygen content of standing determines the addition total amount of the carbon dust.
Specifically, due to the C ＜ 0.03% in the molten steel in the present invention, O ＞ 0.055%, according to this molten steel environment
Condition, then it can be seen that the carbon oxygen content in molten steel is in carbon hypoxemia trend high, and carbon dust deoxidization technique is using in carbon dust
[C] and molten steel in [O] reaction be produced into CO gases, reduce the purpose of steel oxygen content in water to reach, therefore RH arrives at a station oxygen
Content is to determine that deoxidation carbon dust adds the principal element of total amount, specific to add quantity see the table below：
| Arrive at a station oxygen/ppm | 550-600 | 600-650 | 650-700 | More than 700 |
| Target carbon dust amount/kg | 18-22 | 28-32 | 38-42 | 42-46 |
Step 12, controls the vacuum of RH refining furnaces to 170-190mbar.
Because carbon is stronger with the ability of oxygen under vacuum environment, substantial amounts of CO gases, and vacuum will be produced in the short time
Under the conditions of reaction between carbon and oxygen severe degree it is relevant with vacuum, vacuum high carbon-oxygen reaction severe degree it is relatively small, therefore
Carbon dust add early stage need to be controlled by vacuum, application of vacuum incipient stage vacuum according to 170-190mbar controls,
The carbon dust is added to carry out carbon deoxidation operation by vacuum toner by after vacuum reaches this standard, carbon dust can general after adding
Vacuum degree control switchs to 40-50mbar.
Step 13, according to the addition total amount of the carbon dust, makes the carbon dust add in batches to the RH refining furnaces, and then
So that the oxygen in molten steel in the carbon dust and the RH refining furnaces is reacted, CO gas or carbon dioxide are generated
Gas, discharges the RH refining furnaces.
Addition total amount based on the carbon dust, the RH refining furnaces are added by the carbon dust by batch, per batch addition
≤ 15kg, the interval between two neighboring batch adds the time in 10-15s.
Specifically, [C], [O] reaction are very violent when being processed due to RH refining furnaces, therefore carbon dust must be a small amount of in batches
Repeatedly add, can not disposably add excess toner, in case causing acutely seething for molten steel ladle, single batch when adding carbon dust
Addition≤15kg, interval time is in 10-15s between batch.
In addition to above-mentioned steps, in the addition total amount according to the carbon dust, the carbon dust is set to add in batches to institute
State after RH refining furnaces, methods described also includes：Control the recyclegas flow of the RH refining furnaces.
Used as a kind of optional embodiment, circulating air flow is controlled in 1100-1300Nl/min when adding carbon dust first,
The carbon dust is added to be spaced after a preset time period (such as after adding 18-22s, naturally it is also possible to be the 20) circulation first
Throughput is controlled in 1400-1600Nl/min, and decarburization terminates the rear circulating air flow control in 1600-1800Nl/min.
Specifically, plus after carbon dust, reaction between carbon and oxygen acutely, molten steel splash, molten steel face stir larger, there is ladle to overflow slag, heat
The potential safety hazards such as top cover dry slag.Therefore different times recyclegas flow is added to carbon dust to be needed strictly to be controlled, specially
The control of circulating air flow adds 1400-1600Nl/min after 18-22s in 1100-1300Nl/min when early stage carbon dust is added, and takes off
Carbon terminates 1600-1800Nl/min.
Method of deoxidation of the invention, can make up the shadow that converter terminal controls bad (terminal oxygen is high) to bring steel quality
Ring；Excess oxygen in molten steel is removed by the way of adding carbon dust, C and O reaction production things are CO, CO2Gas, gas is with vacuum
Pump discharges vacuum system, does not pollute molten steel, can reach the purpose for improving quality of molten steel.Carbon dust is cheap, and aluminum shot price is higher,
By adding carbon dust deoxidation, the aluminum shot usage amount of final deoxidizing can be reduced, reduce production cost.
Illustrated with specific example below.
Concrete operation step is：
Example one, smelting suprelow carbon steel heat, ladle enters the station, and connects bottom blowing, and ladle to lifting waits position, recycle stream
Ar gas is switched to, to RH refining furnace processing positions, it is thick to measure slag, thermometric, sampling for jacking ladle, determine oxygen, RH arrives at a station temperature
It it is 1643 DEG C, C content of arriving at a station is 0.022%, oxygen content of arriving at a station is 640ppm, forvacuum is opened vacuum valve and starts to vacuumize
To 180mbar, the common 27kg of C powder, first 15kg, second batch is added to be added after first addition 10s in two batches according to form
Carbon dust 12kg, carries out deoxygenation, and the control of circulating air flow adds 1400- after 20s in 1200Nl/min when carbon dust is added
1600Nl/min, decarburization terminates 1600-1800Nl/min applications of vacuum started temperature for 1619 DEG C, and decarburization terminates rear oxygen analysis
For oxygen activity is 370.3ppm before adding Al, the application of vacuum cycle is 34min, and it is 0.0010%, total process cycle to terminate C content
42min。
Example two, smelting suprelow carbon steel heat, ladle enters the station, and connects bottom blowing, and ladle to lifting waits position, recycle stream
Ar gas is switched to, to RH refining furnace processing positions, it is thick to measure slag, thermometric, sampling for jacking ladle, determine oxygen, RH arrives at a station temperature
It it is 1632 DEG C, C content of arriving at a station is 0.039%, oxygen content of arriving at a station is 593ppm, forvacuum is opened vacuum valve and starts to vacuumize
To 180mbar, the common 20kg of C powder, first 10kg, second batch is added to be added after first addition 10s in two batches according to form
Carbon dust 10kg, carries out deoxygenation, and the control of circulating air flow adds 1500Nl/ after 20s in 1200Nl/min when carbon dust is added
Min, it is 1621 DEG C that decarburization terminates 1700Nl/min applications of vacuum started temperature, and decarburization terminates rear oxygen analysis for oxygen is lived before adding Al
It is 390.1ppm to spend, and the application of vacuum cycle is 33min, and it is 0.0015%, total process cycle 43min to terminate C content.
From in terms of production practices, this feed postition coordinates appropriate addition opportunity, vacuum, circular flow etc., in ladle
Molten steel is not resulted in and acutely stirred, and molten steel face is more steady, and hot top cover dry slag is relative to be reduced, and production operation is safe and reliable.
Plus carbon dust auxiliary deoxidation, the oxygen activity before carbon aluminium-killed steel plus aluminium is can obviously reduce, the addition for adding Al is reduced, and reduce
Al2O3The generation being mingled with.
The present invention can make up the influence that converter terminal controls bad (terminal oxygen is high) to bring steel quality；Using addition carbon
The mode of powder removes the excess oxygen in molten steel, and C and O reaction production things are CO, CO2Gas, gas is with vavuum pump discharge vacuum system
System, does not pollute molten steel, can reach the purpose for improving quality of molten steel.Carbon dust is cheap, and aluminum shot price is higher, by adding carbon dust
Deoxidation, can reduce the aluminum shot usage amount of final deoxidizing, reduce production cost.
By one or more embodiment of the invention, the invention has the advantages that or advantage：
The invention discloses a kind of method of deoxidation, in order to reduce the Al generated using aluminum shot deoxidation2O3The problem being mingled with,
Present invention uses carbon dust deoxy technology, the addition total amount of carbon dust is first determined；Then the vacuum of control RH refining furnaces is to 170-
190mbar；According to the addition total amount of the carbon dust, the carbon dust is added in batches to the RH refining furnaces, and then cause institute
The oxygen stated in the molten steel in carbon dust and the RH refining furnaces is reacted, and generates CO gas or carbon dioxide,
So the present invention does not only reach the purpose of oxygen activity before reduction plus aluminium, the consumption of aluminum products is reduced, and deoxidation products is CO,
The noresidue in molten steel, has reached the purpose for not only reducing production cost but also improve product quality.
Although having been described for the preferred embodiment of the application, one of ordinary skilled in the art once knows substantially
Creative concept, then can make other change and modification to these embodiments.So, appended claims are intended to be construed to bag
Include preferred embodiment and fall into having altered and changing for the application scope.
Obviously, those skilled in the art can carry out the essence of various changes and modification without deviating from the application to the application
God and scope.So, if these modifications of the application and modification belong to the scope of the application claim and its equivalent technologies
Within, then the application is also intended to comprising these changes and modification.
Claims (8)
1. a kind of method of deoxidation, it is characterised in that methods described includes：
Determine the addition total amount of carbon dust；
The vacuum of RH refining furnaces is controlled to 170-190mbar；
According to the addition total amount of the carbon dust, the carbon dust is added in batches to the RH refining furnaces, and then cause the carbon
The oxygen in molten steel in powder and the RH refining furnaces is reacted, and generates CO gas or carbon dioxide, discharge
The RH refining furnaces.
2. the method for claim 1, it is characterised in that the addition total amount of the determination carbon dust, including：
Detection RH arrives at a station oxygen content；
The addition total amount of the carbon dust is determined based on the oxygen content of arriving at a station.
3. method as claimed in claim 2, it is characterised in that it is described based on the oxygen content of arriving at a station determine the carbon dust plus
Enter total amount, including：
When the oxygen content of arriving at a station is for 550-600ppm, the addition total amount of the carbon dust is：18-22kg；
When the oxygen content of arriving at a station is for 600-650ppm, the addition total amount of the carbon dust is：28-32kg；
When the oxygen content of arriving at a station is for 650-700ppm, the addition total amount of the carbon dust is：38-42kg；
When the oxygen content of arriving at a station is more than 700, the addition total amount of the carbon dust is：42-46kg.
4. the method for claim 1, it is characterised in that the addition total amount according to the carbon dust, makes the carbon dust
Add in batches to the RH refining furnaces, including：
Addition total amount based on the carbon dust, the RH refining furnaces are added by the carbon dust by batch, per batch addition≤
15kg, the interval between two neighboring batch adds the time in 10-15s.
5. the method for claim 1, it is characterised in that the addition total amount according to the carbon dust, makes the carbon dust
Add in batches to the RH refining furnaces, methods described also includes：
Control the recyclegas flow of the RH refining furnaces.
6. method as claimed in claim 5, it is characterised in that the recyclegas flow of the control RH refining furnaces, bag
Include：
When adding the carbon dust first, circulating air flow is controlled in 1100-1300Nl/min；
After adding the carbon dust to be spaced a preset time period first, the circulating air flow control is in 1400-1600Nl/
min；
Decarburization terminates the rear circulating air flow control in 1600-1800Nl/min.
7. method as claimed in claim 6, it is characterised in that
The preset time period is 18-22s.
8. the method for claim 1, it is characterised in that the addition total amount according to the carbon dust, makes the carbon dust
Add in batches to the RH refining furnaces, methods described also includes：
The vacuum for controlling the RH refining furnaces is 40-50mbar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710219307.4A CN106893800A (en) | 2017-04-06 | 2017-04-06 | A kind of method of deoxidation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710219307.4A CN106893800A (en) | 2017-04-06 | 2017-04-06 | A kind of method of deoxidation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106893800A true CN106893800A (en) | 2017-06-27 |
Family
ID=59193093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710219307.4A Pending CN106893800A (en) | 2017-04-06 | 2017-04-06 | A kind of method of deoxidation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106893800A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108998630A (en) * | 2018-09-21 | 2018-12-14 | 中北大学 | A kind of IF steel clamp sundries whole process cooperative control method |
| CN110684882A (en) * | 2019-11-05 | 2020-01-14 | 山东钢铁集团日照有限公司 | Oxygen-containing steel RH vacuum carbon powder deoxidation cooling method |
| CN113073269A (en) * | 2021-03-31 | 2021-07-06 | 安徽富凯特材有限公司 | Smelting process of high-carbon chromium stainless bearing steel parent metal |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06116626A (en) * | 1991-07-04 | 1994-04-26 | Nippon Steel Corp | Method for smelting low carbon steel by using vacuum refining furnace |
| CN104988280A (en) * | 2015-05-27 | 2015-10-21 | 北京首钢股份有限公司 | Method for lowering oxygen activity of steel with oxygen before aluminum feeding |
| CN105200193A (en) * | 2015-09-10 | 2015-12-30 | 北京首钢股份有限公司 | Method of refining middle-low grade non-oriented silicon steel |
| CN105648151A (en) * | 2014-12-03 | 2016-06-08 | 天津天铁冶金集团有限公司 | RH (Ruhrstahl-Heraeus) carbon-adding deoxidization advanced operation method |
| CN106011384A (en) * | 2016-06-21 | 2016-10-12 | 首钢京唐钢铁联合有限责任公司 | Method for smelting non-sedating molten steel |
-
2017
- 2017-04-06 CN CN201710219307.4A patent/CN106893800A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06116626A (en) * | 1991-07-04 | 1994-04-26 | Nippon Steel Corp | Method for smelting low carbon steel by using vacuum refining furnace |
| CN105648151A (en) * | 2014-12-03 | 2016-06-08 | 天津天铁冶金集团有限公司 | RH (Ruhrstahl-Heraeus) carbon-adding deoxidization advanced operation method |
| CN104988280A (en) * | 2015-05-27 | 2015-10-21 | 北京首钢股份有限公司 | Method for lowering oxygen activity of steel with oxygen before aluminum feeding |
| CN105200193A (en) * | 2015-09-10 | 2015-12-30 | 北京首钢股份有限公司 | Method of refining middle-low grade non-oriented silicon steel |
| CN106011384A (en) * | 2016-06-21 | 2016-10-12 | 首钢京唐钢铁联合有限责任公司 | Method for smelting non-sedating molten steel |
Non-Patent Citations (1)
| Title |
|---|
| 张素芳 等: "低碳钢在RH工序碳粒脱氧的生产实践", 《天津冶金》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108998630A (en) * | 2018-09-21 | 2018-12-14 | 中北大学 | A kind of IF steel clamp sundries whole process cooperative control method |
| CN110684882A (en) * | 2019-11-05 | 2020-01-14 | 山东钢铁集团日照有限公司 | Oxygen-containing steel RH vacuum carbon powder deoxidation cooling method |
| CN113073269A (en) * | 2021-03-31 | 2021-07-06 | 安徽富凯特材有限公司 | Smelting process of high-carbon chromium stainless bearing steel parent metal |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108060289B (en) | A kind of temperature-compensating refinery practice of RH refining furnace production IF steel | |
| CN110484681A (en) | A kind of production method of low carbon low silicon aluminium killed steel water | |
| CN107201422B (en) | A kind of production method of mild steel | |
| CN104962800A (en) | Smelting method for stainless steel material | |
| CN111893392B (en) | Smelting method for reducing edge crack incidence rate of 45 steel plate | |
| CN109252010B (en) | Smelting method for controlling oxidability of IF steel top slag | |
| CN106893800A (en) | A kind of method of deoxidation | |
| CN109777918A (en) | A kind of external refining production method refining high-carbon-chromium bearing steel inclusion particle | |
| CN108588338A (en) | A kind of VD stoves utilize CO2The method for making steel denitrogenation | |
| CN110527775A (en) | A kind of RH refining furnace chemical heating method suitable for carbon aluminium-killed steel | |
| JP2015042777A (en) | Method for smelting high nitrogen steel | |
| CN108148946A (en) | A kind of LF stoves refinery practice | |
| CN104988270A (en) | Method for smelting pipeline steel with low cost | |
| CN114836593A (en) | Smelting process of low-carbon aluminum-containing cold forging steel | |
| CN104531953A (en) | Refining argon blowing method applied to SPHC steel grade | |
| CN108504819B (en) | Process and device for smelting low-micro ferrochrome through AOD and VOD duplex | |
| CN103468868B (en) | Method for improving cleanliness of low-phosphorus interstitial-free steel | |
| CN113913580B (en) | Production method of ultralow-carbon low-aluminum structural molten steel | |
| CN109439842A (en) | The production method of motor pawl machine AISI1006 steel | |
| CN104962683A (en) | Smelting method of steel containing nitrogen | |
| CN104263883A (en) | Low-cost silicon carbide deoxidation method | |
| CN115612776B (en) | Production method of plain carbon steel without refining | |
| CN104862449B (en) | The control method of nitrogen in a kind of steel for saw blade substrate | |
| JP5200380B2 (en) | Desulfurization method for molten steel | |
| CN103225009A (en) | Method for producing high-cleanness steel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 100041 Shijingshan Road, Beijing, No. 68, No. Applicant after: Shougang Group Co. Ltd. Address before: 100041 Shijingshan Road, Beijing, No. 68, No. Applicant before: Capital Iron & Steel General Company |
|
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170627 |