CN108193011A - The method that the converter smelting of half steel containing vanadium carries out vanadium alloying using vanadium slag - Google Patents
The method that the converter smelting of half steel containing vanadium carries out vanadium alloying using vanadium slag Download PDFInfo
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- CN108193011A CN108193011A CN201711475891.6A CN201711475891A CN108193011A CN 108193011 A CN108193011 A CN 108193011A CN 201711475891 A CN201711475891 A CN 201711475891A CN 108193011 A CN108193011 A CN 108193011A
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- 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
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
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Abstract
A kind of method for carrying out vanadium alloying using vanadium slag the invention discloses converter smelting of half steel containing vanadium, belongs to steelmaking technical field.The technical problems to be solved by the invention are to provide one kind and carry out vanadium alloying method for making steel using vanadium slag in converter, contain vanadium iron so as to partly or entirely be substituted with cheap vanadium slag, produce low-cost high-strength steel grade.This method includes the following steps：Vanadium slag is crushed blocking；Before converter tapping or in tapping process, ladle in place after, according to converter terminal analysis of components result, vanadium slag is added in ladle, and other alloying components of deoxidier and target steel grade are added in tapping process；It controls ladle slag thick at the end of tapping, and lime and fluorite is added in the top of the slag.Steel grade obtained by the method for the present invention, the recovery rate of vanadium are stablized, and technological process is short, of low cost, and chemical composition and performance indicator fully achieve relevant criterion requirement, and the production for vanadium-containing steel provides a more economical approach.
Description
Technical field
The invention belongs to steelmaking technical field, more particularly to a kind of converter smelting of half steel containing vanadium carries out vanadium alloy using vanadium slag
The method of change.
Background technology
At present, to reach the requirement of high intensity steel grade, iron and steel enterprise be typically employed in smelting process in steel add V and
The elements such as Ti, Nb carry out the production method of microalloying, play the role of precipitation strength and crystal grain is inhibited to grow up, so as to significantly carry
The mechanical property of Gao Gang.
Vanadium-containing alloy is added in ladle in converter tapping process and carries out microalloying, the method has that dosage is few, absorbs
The advantage that rate is stablized, but since ferroalloy is expensive, the production cost of high intensity steel grade is made to remain high, affects product
The market competitiveness.Climbing steel has advantageous vanadium and titanium resources advantage, contains abundant V element in molten iron, content of vanadium is reachable
0.20%-0.40%, while the oxide content containing [V] is higher in the clinker generated in vanadium extraction by converter blowing process, wherein V2O5Contain
5%-25% is measured, is the primary raw material for producing vanadium alloy, it is cheap, therefore carry out alloy metaplasia using cheap vanadium slag
The steel grade of high intensity containing vanadium is produced, steel-making cost can be significantly reduced, improves market competitiveness of enterprises.
Invention content
The technical problems to be solved by the invention are to provide one kind and carry out vanadium alloying steel-making side using vanadium slag in converter
Method so as to partly or entirely be substituted with cheap vanadium slag containing vanadium iron, produces low-cost high-strength steel grade.
The present invention solves above-mentioned technical problem and is used the technical solution adopted is that providing a kind of converter smelting of half steel containing vanadium
The method that vanadium slag carries out vanadium alloying, this method include the following steps：
A, vanadium slag is broken into the fragment of 5~15mm granularities, be then put into fragment spare in Converter feed bin；
B, vanadium slag alloying is carried out before converter tapping：Ladle starts 30~60s of steel ladle bottom argon blowing, Argon intensity afterwards in place
It controls in 1~3L/Mint steel, according to converter terminal analysis of components result, vanadium slag fragment obtained by step A is added in ladle simultaneously
Start to tap, tapping process whole process Argon, 3~10min of argon blowing time, Argon strength control is in 1~5L/Mint steel；
Alternatively, vanadium slag alloying is carried out in converter tapping process：Ladle starts 30~60s of steel ladle bottom argon blowing afterwards in place,
Argon strength control starts to tap later in 1~3L/Mint steel, tapping process whole process Argon, 3~10min of argon blowing time,
Argon strength control is in 1~5L/Mint steel, and according to converter terminal analysis of components result, molten steel amount accounts for the 5 of total weight in ladle
Vanadium slag fragment obtained by step A is added in ladle when~10%；
C, in converter tapping process, according to converter terminal analysis of components result, deoxidier and target steel grade other are added in
Alloying component；
D, ladle slag thickness≤80mm is controlled at the end of tapping, and lime and fluorite are added in the top of the slag；
Wherein, in step B, the addition Q (kg) of the vanadium slag fragment is calculated as follows：
Wherein, V2For steel grade V content desired value；V1For the residual V content of converter；M is steel
Water；N is the v element rate of recovery, and value is 0.90~0.95；Y is vanadium slag V content.
Wherein, in the above method, the converter smelting of half steel containing vanadium use vanadium slag carry out the increasing vanadium amount of vanadium alloying for 0.010~
0.30%.
Wherein, in the above method, in step A, the V of the vanadium slag2O5Mass content is 5%~25%.
Wherein, in the above method, in step C, the deoxidier is at least one of ferro-aluminum, ferrosilicon or Si-Ca-Ba.
Wherein, in the above method, in step C, the addition of the deoxidier is 5~20kg/ tons of steel.
Wherein, in the above method, in step D, the addition of the lime is 2~5kg/ tons of steel；The addition of the fluorite
It measures as 0.2~0.5kg/ tons of steel.
Beneficial effects of the present invention：
The method of the present invention carries out carry out vanadium using the higher vanadium slag of content of vanadium as raw material, before converter tapping or in tapping process
Alloying using cheap vanadium slag partly or entirely instead of containing vanadium iron, significantly reduces the steel grade of high intensity containing vanadium
Production；Vanadium slag need to only pass through simple shattering process, no longer carry out magnetic separation, pelletizing or other manufacturing procedures, thus can be into one
Step reduces production cost；The steel grade of high intensity containing vanadium produced using the method for the present invention, the recovery rate of vanadium are stablized, and technological process is short,
Of low cost, gained steel grade chemical composition and performance indicator fully achieve relevant criterion requirement, are the production of vanadium-containing steel
Provide a more economical approach.
Specific embodiment
Specifically, a kind of method that converter smelting of half steel containing vanadium carries out vanadium alloying using vanadium slag, this method includes following
Step：
A, vanadium slag is broken into the fragment of 5~15mm granularities, be then put into fragment spare in Converter feed bin；
B, vanadium slag alloying is carried out before converter tapping：Ladle starts 30~60s of steel ladle bottom argon blowing, Argon intensity afterwards in place
It controls in 1~3L/Mint steel, according to converter terminal analysis of components result, vanadium slag fragment obtained by step A is added in ladle simultaneously
Start to tap, tapping process whole process Argon, 3~10min of argon blowing time, Argon strength control is in 1~5L/Mint steel；
Alternatively, vanadium slag alloying is carried out in converter tapping process：Ladle starts 30~60s of steel ladle bottom argon blowing afterwards in place,
Argon strength control starts to tap later, tapping process whole process Argon, argon blowing time 3-10min is blown in 1~3L/Mint steel
Argon strength control is in 1~5L/Mint steel, according to converter terminal analysis of components result, in ladle molten steel amount account for total weight 5~
Vanadium slag fragment obtained by step A is added in ladle when 10%；
C, in converter tapping process, according to converter terminal analysis of components result, deoxidier and target steel grade other are added in
Alloying component；
D, ladle slag thickness≤80mm is controlled at the end of tapping, and lime and fluorite are added in the top of the slag；
Wherein, in step B, the addition Q (kg) of the vanadium slag fragment is calculated as follows：Wherein, V2For steel grade V content desired value；V1For the residual V content of converter；M is molten steel amount；N is
The v element rate of recovery, value are 0.90~0.95；Y is vanadium slag V content.
Inventor in experiments it is found that：The amount for adding in clinker before converter tapping or in tapping process has one to liquid steel temperature
Fixing is rung, and then influences alloying quality, while considers that increasing vanadium amount is excessive and influences the factor of molten steel composition uniformity, containing vanadium half
Steel converter smelting use the increasing vanadium amount of vanadium slag progress vanadium alloying as 0.010~0.30%.
The V of vanadium slag used by the method for the present invention2O5Content is generally 5%~25%, by the V of vanadium slag2O5Content is multiplied by
0.56 up to the vanadium slag V content be 2.8%~14%.
Argon terminates in the method for the present invention, starts to tap, and its of addition deoxidier and target steel grade in tapping process
His alloying component；The deoxidier is at least one of ferro-aluminum, ferrosilicon or Si-Ca-Ba, and addition is 5~20kg/ tons of steel.
In the method for the present invention step D, the addition is the lime of 2~5kg/ tons of steel and the firefly of 0.2~0.5kg/ tons of steel
Stone, to adjust slag system, control basicity], obtain qualified steel grade.
The present invention will be described in more detail by the following examples, and protection scope of the present invention is not limited to and this,
Any one skilled in the art in the technical scope disclosed by the present invention, the variation that can readily occur in or replaces
It changes, should be covered by the protection scope of the present invention.
Embodiment 1
The present embodiment target steel grade is HRB400, and the requirement of finished product V content is 0.045~0.060%, uses V2O5Content
Vanadium slag for 17% carries out alloying；Concrete operations are as follows：
A, above-mentioned vanadium slag is broken into the fragment of 5~15mm granularities, be then put into fragment spare in Converter feed bin；
B, before converter tapping, ladle in place after, start steel ladle bottom argon blowing 50s, Argon strength control is in 1.5L/Mint
Steel, according to converter terminal analysis of components result, vanadium 0.005% more than converter molten steel terminal, according to ton steel vanadium slag addition formula meter
It calculates, dosage when increasing containing vanadium slag vanadium 0.05% using this grade is 5.78kg/ ton steel, in vanadium slag addition ladle and will start
Steel, tapping process whole process Argon, argon blowing time 5in, Argon strength control is in 3L/Mint steel；
C, according to converter terminal analysis of components result, and other alloys of addition ferrosilicon and target steel grade in tapping process
Its addition of ingredient, wherein ferrosilicon is 10kg/ tons of steel；
D, ladle slag thickness 60mm is controlled at the end of tapping, and 4kg/ tons of steel of lime, 0.2kg/ tons of steel of fluorite are added in the top of the slag；
The product sampling produced according to the method described above, the V content of gained steel grade is 0.055%.
Embodiment 2
The present embodiment target steel grade is HRB400, and the requirement of finished product V content is 0.030~0.060%, uses V2O5Content
Vanadium slag for 12% carries out alloying；Concrete operations are as follows：
A, above-mentioned vanadium slag is broken into the fragment of mm granularities, be then put into fragment spare in Converter feed bin；
B, before converter tapping, ladle in place after, start steel ladle bottom argon blowing 60s, Argon strength control in 3L/Mint steel,
According to converter terminal analysis of components result, vanadium 0.005% more than converter molten steel terminal is calculated according to ton steel vanadium slag addition formula,
Dosage when increasing vanadium 0.045% using the vanadium slag of this grade is 7.36kg/ tons of steel, and vanadium slag is added in ladle and starts to tap,
Tapping process whole process Argon, argon blowing time 4.5min, Argon strength control is in 2.5L/Mint steel；
C, according to converter terminal analysis of components result, and other alloys of addition ferrosilicon and target steel grade in tapping process
Its addition of ingredient, wherein ferrosilicon is 10kg/ tons of steel；
D, ladle slag thickness 60mm is controlled at the end of tapping, and 4kg/ tons of steel of lime, 0.2kg/ tons of steel of fluorite are added in the top of the slag；
The product sampling produced according to the method described above, the V content of gained steel grade is 0.050%.
Embodiment 3
The present embodiment target steel grade is HRB400, and the requirement of finished product V content is 0.030~0.060%, uses V2O5Content
Vanadium slag for 12% carries out alloying；Concrete operations are as follows：
A, above-mentioned vanadium slag is broken into the fragment of 10mm granularities, be then put into fragment spare in Converter feed bin；
B, vanadium slag alloying is carried out in converter tapping process：Ladle starts steel ladle bottom argon blowing 60s, Argon intensity control afterwards in place
It makes in 1L/Mint steel, starts to tap later, tapping process whole process Argon, argon blowing time 6min, Argon strength control is in 3L/
Mint steel, according to converter terminal analysis of components result, vanadium 0.005% more than converter molten steel terminal, according to ton steel vanadium slag addition
Formula calculates, and dosage when increasing vanadium 0.045% using the vanadium slag of this grade is 7.36kg/ tons of steel, and molten steel amount accounts for gross weight in ladle
Amount 8% when will vanadium slag add in ladle in；
C, according to converter terminal analysis of components result, and other alloys of addition ferrosilicon and target steel grade in tapping process
Its addition of ingredient, wherein ferrosilicon is 10kg/ tons of steel；
D, ladle slag thickness 60mm is controlled at the end of tapping, and 4kg/ tons of steel of lime, 0.2kg/ tons of steel of fluorite are added in the top of the slag；
The product sampling produced according to the method described above, the V content of gained steel grade is 0.050%.
By Examples 1 to 3 it is found that the method for the present invention before converter tapping or goes out using the higher vanadium slag of content of vanadium as raw material
Vanadium alloying is carried out during steel, using cheap vanadium slag partly or entirely instead of containing vanadium iron, is significantly reduced
The steel grade of high intensity containing vanadium produces；Vanadium slag need to only pass through simple shattering process, no longer carry out magnetic separation, pelletizing or other processing works
Sequence, thus can further reduce production cost；The steel grade of high intensity containing vanadium produced using the method for the present invention, the recovery rate of vanadium are steady
Calmly, technological process is short, cost-effective, and the production for vanadium-containing steel provides a more economical approach.
Claims (6)
1. the method that the converter smelting of half steel containing vanadium carries out vanadium alloying using vanadium slag, it is characterised in that：Include the following steps：
A, vanadium slag is broken into the fragment of 5~15mm granularities, be then put into fragment spare in Converter feed bin；
B, vanadium slag alloying is carried out before converter tapping：Ladle starts 30~60s of steel ladle bottom argon blowing, Argon strength control afterwards in place
In 1~3L/Mint steel, according to converter terminal analysis of components result, vanadium slag fragment obtained by step A is added in ladle and started
Tapping, tapping process whole process Argon, 3~10min of argon blowing time, Argon strength control is in 1~5L/Mint steel；
Alternatively, vanadium slag alloying is carried out in converter tapping process：Ladle starts 30~60s of steel ladle bottom argon blowing, Argon afterwards in place
Strength control starts to tap later in 1~3L/Mint steel, tapping process whole process Argon, 3~10min of argon blowing time, Argon
Strength control is in 1~5L/Mint steel, according to converter terminal analysis of components result, in ladle molten steel amount account for total weight 5~
Vanadium slag fragment obtained by step A is added in ladle when 10%；
C, in converter tapping process, according to converter terminal analysis of components result, other alloys of deoxidier and target steel grade are added in
Ingredient；
D, ladle slag thickness≤80mm is controlled at the end of tapping, and lime and fluorite are added in the top of the slag；
Wherein, in step B, the addition Q of the vanadium slag fragment is calculated as follows：
Wherein, V2For steel grade V content desired value；V1For the residual V content of converter；M is molten steel amount；N be the v element rate of recovery, value 0.90
~0.95；Y is vanadium slag V content.
2. the method that the converter smelting of half steel containing vanadium according to claim 1 carries out vanadium alloying using vanadium slag, feature exist
In：The converter smelting of half steel containing vanadium uses vanadium slag to carry out the increasing vanadium amount of vanadium alloying as 0.010~0.30%.
3. the method that the converter smelting of half steel containing vanadium according to claim 1 carries out vanadium alloying using vanadium slag, feature exist
In：In step A, the V of the vanadium slag2O5Mass content is 5%~25%.
4. the method for vanadium alloying is carried out using vanadium slag according to claims 1 to 3 any one of them half steel containing vanadium converter smelting,
It is characterized in that：In step C, the deoxidier is at least one of ferro-aluminum, ferrosilicon or Si-Ca-Ba.
5. the method that the converter smelting of half steel containing vanadium according to claim 4 carries out vanadium alloying using vanadium slag, feature exist
In：In step C, the addition of the deoxidier is 5~20kg/ tons of steel.
6. the method that the converter smelting of half steel containing vanadium according to claim 1 carries out vanadium alloying using vanadium slag, feature exist
In：In step D, the addition of the lime is 2~5kg/ tons of steel；The addition of the fluorite is 0.2~0.5kg/ tons of steel.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110317918A (en) * | 2019-08-13 | 2019-10-11 | 李明欣 | A kind of method of vanadium alloying synchronous production titanium slag |
| CN113462852A (en) * | 2021-07-01 | 2021-10-01 | 攀钢集团攀枝花钢钒有限公司 | Method for alloying vanadium in semisteel slag |
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| Publication number | Priority date | Publication date | Assignee | Title |
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Application publication date: 20180622 |