CN110343806A - A kind of H08A, H08MnA series low-carbon steel smelting deoxidization technique - Google Patents
A kind of H08A, H08MnA series low-carbon steel smelting deoxidization technique Download PDFInfo
- Publication number
- CN110343806A CN110343806A CN201810283405.9A CN201810283405A CN110343806A CN 110343806 A CN110343806 A CN 110343806A CN 201810283405 A CN201810283405 A CN 201810283405A CN 110343806 A CN110343806 A CN 110343806A
- Authority
- CN
- China
- Prior art keywords
- carbon
- h08mna
- steel
- low
- aluminium block
- 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
- C21C7/0006—Adding metallic additives
-
- 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
- C21C7/04—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
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/072—Treatment with gases
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)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The present invention provides a kind of H08A, H08MnA series low-carbon steel smelting deoxidization techniques, it is characterized by: when converter producing H08A, H08MnA series low-carbon low-silicon steel, converter tapping process whole process steel ladle bottom argon blowing is added fine aluminium block and is used for deoxidation, sequentially adds mid-carbon fe-mn, carburant.The invention has the advantages that usage amount is less, and cost is relatively low using fine aluminium block deoxidation, it can reduce cost and can reduce the labor intensity of worker.
Description
Technical field
The present invention relates to steel grade field of smelting, specifically, being that be related to a kind of H08A, H08MnA series low-carbon steel smelting de-
Oxygen technique.
Background technique
When conventionally produced H08A, H08MnA steel series, mainly there are two process routes: 1. converter → continuous casting, 2.
Converter → LF refining → continuous casting.
It is more demanding for Molten Steel Cleanliness, castability because of continuous casting in converter directly when being produced by the 1st kind of process route, therefore
It is critically important for the selection of coverter pig deoxidier, to be conducive to deoxidation production lower melting point inclusion, be conducive to inclusion floating.Tradition
Technique all uses aluminium manganese iron as converter end-deoxidizer, and the main component of aluminium manganese iron is Al:20-26%, Mn:20-28%.It uses
The advantages of aluminium manganese-ferro deoxidation be production field trash be low melting point plyability field trash, be particularly conducive to improve converter it is straight on connect
The pourability of molten steel of casting.
It is produced using above-mentioned process route, converter uses aluminium manganese-ferro deoxidation, and castability is good, but higher cost, in addition work
Aluminium manganese iron additional amount is larger in skill process, and labor intensity is big.
Summary of the invention
It is an object of the invention to overcome the shortcoming of above-mentioned traditional technology, it is low to provide a kind of H08A, H08MnA series
Carbon steel smelts deoxidization technique, and using fine aluminium block deoxidation, usage amount is less, and cost is relatively low.
Bessemerize the oxygen mass fraction height in endpoint molten steel have to the degree of purity and recovery rate of iron of steel it is important
It influences, according to the principle of reaction balance: carbon in molten metal reacts equilibrium relation with the oxygen in molten metal, [C]+[O]=CO
△ G=-22186-38.386T J/mol.The quality hundred of carbon oxygen concentration product carbon and oxygen in molten steel i.e. under certain temperature and pressure
The product of point concentration is a constant and unrelated with the concentration of reactant and product.
With the reduction of carbon in steel, its oxygen mass fraction will certainly increase, therefore in tapping process, how guarantee
While certain carbon mass fraction, the oxygen mass fraction in molten steel, the smelting for mild steel and high added value steel are reduced as far as possible
Important in inhibiting, carbon mass fraction height are the important evidences for measuring oxygen mass fraction in steel.Terminal oxygen is low to be advantageously reduced
Alloy consumption, reduces the field trash formed in deoxidation process, improves steel quality.
The purpose of the present invention is what is reached by following technical measures: a kind of H08A, H08MnA series low-carbon steel smelting
Deoxidization technique, when converter producing H08A, H08MnA series low-carbon low-silicon steel, converter tapping process whole process steel ladle bottom argon blowing is added
Fine aluminium block is used for deoxidation, sequentially adds mid-carbon fe-mn, carburant.
Further, it when producing H08A, H08MnA series low-carbon low-silicon steel, is added after fine aluminium block again through ladle refining furnace essence
Refine process.
Further, after tapping, slag retaining cone or slide plate pushing off the slag are used, it is ensured that slag thickness≤30mm, if range estimation slag is thick
When degree is more than 30mm, then the aluminium block for pressing 0.1kg/ tons of steel is added on envelope.
Further, when low-carbon low-silicon steel, Tapping Temperature of Bof presses 1620-1680 DEG C.
Tapping Temperature of Bof presses 1620-1680 DEG C, and reaction rate and reaction limit can reach production at this temperature
Quality level.
Further, when flowing out molten steel 1/5, it is initially added into fine aluminium block, before molten steel outflow 4/5, mid-carbon fe-mn, carburant add
Enter to finish.
When flowing out molten steel 1/5, it is initially added into fine aluminium block, before molten steel outflow 4/5, mid-carbon fe-mn, carburant addition are finished, this
The progress deoxidation of fine aluminium block is added under process sequence can reach satisfactory deoxidation limit.
By adopting the above-described technical solution, compared with prior art, the invention has the advantages that using fine aluminium block deoxidation,
Usage amount is less, and cost is relatively low, can reduce cost and can reduce the labor intensity of worker.
Specific embodiment
Embodiment: when converter producing H08A, H08MnA series low-carbon low-silicon steel, Tapping Temperature of Bof presses 1620-1680 DEG C.
Converter tapping process whole process steel ladle bottom argon blowing is initially added into fine aluminium block when flowing out molten steel 1/5, sequentially adds mid-carbon fe-mn, increases
Carbon agent, before molten steel outflow 4/5, the above material addition is finished.
After tapping, slag retaining cone or slide plate pushing off the slag are used, it is ensured that slag thickness≤30mm.If estimating slag thickness is more than 30mm
When, the aluminium block for pressing 0.1kg/ tons of steel can be added on envelope again.
Fine aluminium block dosage is the key of the steel grade deoxidation operation.When original uses aluminium manganese iron, alloy and aluminium manganese iron dosage situation
Are as follows:
It is 20-22% that ingredient, which is Al, in aluminium manganese iron, and manganese 22-25%, the manganese content of mid-carbon fe-mn is 72-78%.Fine aluminium
The Al of block is 99%.
By using fine aluminium block technique, alloy dosage are as follows:
To after LF refining, oxygen is determined to molten steel using apparatus for determination of oxygen.
Using aluminium manganese iron or fine aluminium block deoxidation, mainly using aluminium element therein come deoxidation, LF refining furnace is arrived in guarantee
For Control for Oxygen Content in target 20-200ppm range, oxygen content is too low to cause aluminium content in molten steel higher, is easy molten steel and stores stream, oxygen
Too high levels, refining furnace deoxidation burden weight, inclusion floating is insufficient, is also easy to store stream.The dosage of fine aluminium block used is key.
Groped to can guarantee that the oxygen content of refining furnace is closed by the corresponding fine aluminium block dosage of the above tapping carbon using fine aluminium block according to converter
Lattice.
The aluminate fusing point of fine aluminium block deoxidation production is high, not as good as the low melting point inclususions for using aluminium manganese-ferro deoxidation to produce
Object is easier to float.If produce H08A, H08MnA series low-carbon low-silicon steel without LF refining furnace, using fine aluminium block, to steel
The mobility effect of water is not so good as to use aluminium manganese iron.But if walking LF refining, the mobility of molten steel is not influenced then using fine aluminium block, because
Through LF refining process, energy having time allows field trash further to float, but LF refining period need >=30min, and the time is too short, is easy steel
Water stores stream.
Claims (5)
1. a kind of H08A, H08MnA series low-carbon steel smelting deoxidization technique, it is characterised in that: converter producing H08A, H08MnA system
When column low-carbon low-silicon steel, converter tapping process whole process steel ladle bottom argon blowing is added fine aluminium block and is used for deoxidation, sequentially adds medium carbon manganese
Iron, carburant.
2. a kind of H08A, H08MnA series low-carbon steel smelting deoxidization technique according to claim 1, it is characterised in that: raw
When producing H08A, H08MnA series low-carbon low-silicon steel, it is added after fine aluminium block again through ladle refining furnace refining procedure.
3. a kind of H08A, H08MnA series low-carbon steel smelting deoxidization technique according to claim 1, it is characterised in that: go out
After steel, slag retaining cone or slide plate pushing off the slag are used, it is ensured that slag thickness≤30mm, if range estimation slag thickness when being more than 30mm, then to packet
The aluminium block for pressing 0.1kg/ tons of steel is added on face.
4. a kind of H08A, H08MnA series low-carbon steel smelting deoxidization technique according to claim 1, it is characterised in that: turn
When furnace produces H08A, H08MnA series low-carbon low-silicon steel, Tapping Temperature of Bof presses 1620-1680 DEG C.
5. a kind of H08A, H08MnA series low-carbon steel smelting deoxidization technique according to claim 1, it is characterised in that: stream
Out when molten steel 1/5, it is initially added into fine aluminium block, before molten steel outflow 4/5, mid-carbon fe-mn, carburant addition are finished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810283405.9A CN110343806A (en) | 2018-04-02 | 2018-04-02 | A kind of H08A, H08MnA series low-carbon steel smelting deoxidization technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810283405.9A CN110343806A (en) | 2018-04-02 | 2018-04-02 | A kind of H08A, H08MnA series low-carbon steel smelting deoxidization technique |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110343806A true CN110343806A (en) | 2019-10-18 |
Family
ID=68173456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810283405.9A Pending CN110343806A (en) | 2018-04-02 | 2018-04-02 | A kind of H08A, H08MnA series low-carbon steel smelting deoxidization technique |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110343806A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112322836A (en) * | 2020-11-04 | 2021-02-05 | 新疆八一钢铁股份有限公司 | Step-by-step deoxidation operation method suitable for low-carbon steel |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09192879A (en) * | 1996-01-10 | 1997-07-29 | Daido Steel Co Ltd | Ferritic stainless steel welding wire superior in weld crack resistance and its manufacture |
| CN102653811A (en) * | 2012-05-07 | 2012-09-05 | 本钢板材股份有限公司 | Method for deoxidization and alloying by using ferro-silico-manganese alloy |
| CN105154778A (en) * | 2015-09-29 | 2015-12-16 | 邢台钢铁有限责任公司 | Cold forging steel coil for welding and producing method for cold forging steel coil |
| CN106702087A (en) * | 2017-01-22 | 2017-05-24 | 本钢板材股份有限公司 | Deoxidation process for H08 steel-grade silicon |
-
2018
- 2018-04-02 CN CN201810283405.9A patent/CN110343806A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09192879A (en) * | 1996-01-10 | 1997-07-29 | Daido Steel Co Ltd | Ferritic stainless steel welding wire superior in weld crack resistance and its manufacture |
| CN102653811A (en) * | 2012-05-07 | 2012-09-05 | 本钢板材股份有限公司 | Method for deoxidization and alloying by using ferro-silico-manganese alloy |
| CN105154778A (en) * | 2015-09-29 | 2015-12-16 | 邢台钢铁有限责任公司 | Cold forging steel coil for welding and producing method for cold forging steel coil |
| CN106702087A (en) * | 2017-01-22 | 2017-05-24 | 本钢板材股份有限公司 | Deoxidation process for H08 steel-grade silicon |
Non-Patent Citations (1)
| Title |
|---|
| 李碧春 等: "H08A焊接用钢圆盘条生产与实践", 《海峡两岸第二届工程材料研讨会论文集》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112322836A (en) * | 2020-11-04 | 2021-02-05 | 新疆八一钢铁股份有限公司 | Step-by-step deoxidation operation method suitable for low-carbon steel |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103627853B (en) | A kind of low-carbon low-silicon steel manufacture method | |
| CN102296157B (en) | Very low Ti control method of ultralow-carbon aluminum-silicon killed steel | |
| CN102134628B (en) | Smelting method of low-carbon aluminium killed steel with low silicon content | |
| CN100569969C (en) | The ferrosilicon smelting waste utilizes technology in manganese alloy smelting | |
| CN102248142B (en) | Method for producing medium and low carbon aluminum killed steel | |
| CN104004881B (en) | A kind of control method of producing nitrogen content in aluminium deoxidation high carbon steel process | |
| CN104004877B (en) | A kind of method reducing converter terminal carbon oxygen and amassing | |
| CN102268513B (en) | Method for improving castability of molten steel of medium and low carbon steel | |
| CN109280731A (en) | The method of the high phosphorus hot metal production steel of converter terminal P≤0.01% is smelted using few slag charge | |
| CN104946974B (en) | The control method of ultra-low carbon baking hardening steel plate base dissolved carbon content | |
| CN107893188B (en) | A kind of smelting process of high intensity manganese-boron steel | |
| CN102329917B (en) | Production method of clean steel | |
| CN103014235B (en) | Deoxidizing process for reducing consumption of aluminum killed steel deoxidizing agent | |
| CN108330240A (en) | Method of the aluminium without calcification processing drops in continuous casting Q235 steel grades | |
| CN101899548A (en) | Novel process for scrap steel preheating and premelting and high-efficiency electric furnace steel making | |
| CN105861781A (en) | Refining method for silicon-killed steel ANS process | |
| CN114150100A (en) | Steelmaking method for smelting high-carbon low-phosphorus steel by converter | |
| CN105087851A (en) | Method for smelting high-carbon steel with semisteel | |
| CN103484599B (en) | Smelting method of high-manganese wear-resistant steel | |
| CN110343806A (en) | A kind of H08A, H08MnA series low-carbon steel smelting deoxidization technique | |
| CN107354262A (en) | A kind of method of vanadium extraction semisteel smelting high phosphorus weathering steel | |
| CN101935734B (en) | Method for reducing rephosphorization amount in convertor steelmaking process | |
| CN102876851B (en) | Method for improving calcium yield of RH vacuum furnace | |
| CN105950825A (en) | Refining method of low-carbon and low-silicon manganese-contained aluminum killed steel liquid | |
| CN104046748B (en) | A kind of liquid steel dephosphorization agent and the method for liquid steel dephosphorization |
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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191018 |