CN106148632A - Economical converter less-slag combined blowing smelting process - Google Patents
Economical converter less-slag combined blowing smelting process Download PDFInfo
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- CN106148632A CN106148632A CN201510141695.XA CN201510141695A CN106148632A CN 106148632 A CN106148632 A CN 106148632A CN 201510141695 A CN201510141695 A CN 201510141695A CN 106148632 A CN106148632 A CN 106148632A
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- slag
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- converter
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- 239000002893 slag Substances 0.000 title claims abstract description 126
- 238000007664 blowing Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000003723 Smelting Methods 0.000 title claims abstract description 17
- 239000007789 gas Substances 0.000 claims abstract description 31
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000001301 oxygen Substances 0.000 claims abstract description 29
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 29
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 28
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 24
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 24
- 229910052757 nitrogen Inorganic materials 0.000 claims description 14
- 235000007164 Oryza sativa Nutrition 0.000 claims description 12
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 229910052786 argon Inorganic materials 0.000 claims description 12
- 229910052742 iron Inorganic materials 0.000 claims description 12
- 235000009566 rice Nutrition 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 239000010459 dolomite Substances 0.000 claims description 10
- 229910000514 dolomite Inorganic materials 0.000 claims description 10
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 8
- 238000010926 purge Methods 0.000 claims description 8
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 6
- 235000019738 Limestone Nutrition 0.000 claims description 6
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 239000006028 limestone Substances 0.000 claims description 6
- 229910052749 magnesium Inorganic materials 0.000 claims description 6
- 239000011777 magnesium Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 6
- 230000008018 melting Effects 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- XWHPIFXRKKHEKR-UHFFFAOYSA-N iron silicon Chemical compound [Si].[Fe] XWHPIFXRKKHEKR-UHFFFAOYSA-N 0.000 claims description 4
- 230000004048 modification Effects 0.000 claims description 4
- 238000012986 modification Methods 0.000 claims description 4
- 238000010079 rubber tapping Methods 0.000 claims description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 3
- 239000001569 carbon dioxide Substances 0.000 claims description 3
- 240000007594 Oryza sativa Species 0.000 claims 1
- 239000004579 marble Substances 0.000 claims 1
- 230000004907 flux Effects 0.000 abstract description 5
- 238000005261 decarburization Methods 0.000 abstract description 4
- 238000004064 recycling Methods 0.000 abstract 2
- 208000028659 discharge Diseases 0.000 abstract 1
- 230000014759 maintenance of location Effects 0.000 abstract 1
- 238000007711 solidification Methods 0.000 abstract 1
- 230000008023 solidification Effects 0.000 abstract 1
- 241000209094 Oryza Species 0.000 description 11
- 230000036284 oxygen consumption Effects 0.000 description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- 239000003034 coal gas Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Classifications
-
- 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
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention relates to a less-slag combined blowing smelting process of an economical converter, which is divided into four stages of a slag solidification stage, a dephosphorization stage, a slag discharge stage and a decarburization stage, wherein each stage adopts different bottom blowing and top blowing gases and adopts a slag remaining and double-slag smelting process; the invention relates to a converter less-slag combined blowing smelting process which integrates a converter combined blowing process, a slag retention process, a double-slag process, furnace slag recycling and the like. The consumption of oxygen and flux is reduced by changing top and bottom blowing gas and slagging system. The recycling rate of the converter slag is improved, and the profit margin of converter smelting is improved.
Description
Technical field
The present invention relates to steelmaking technical field, blow smelting process again particularly to a kind of economical converter less-slag.
Background technology
Present steel industry is depressed, and cost is the greatest problem that each iron and steel enterprise faces.What converter smelting mainly consumed is
Oxygen, flux cost, the approach reducing flux cost is to implement less-slag melting, and reduces oxygen consumption and be limited only to improve oxygen
Rifle and oxygen supply intensity, at present without other effective measures.
Summary of the invention
The technical problem to be solved is to provide a kind of economical converter less-slag and blows smelting process again, by changing the end, top
Multiple blowing, slagging regime reduce oxygen, flux consumption.
For achieving the above object, the present invention realizes by the following technical solutions:
A kind of economical converter less-slag blows smelting process again, is divided into slag cure stage, dephosphorization stage, slagging stage, decarburization
Stage four-stage altogether, the different bottom blowing of employing of each stage and top-blown gas, use simultaneously and stay slag and double slag melting technique；
Concrete operation step is as follows:
1, slag cure stage
Bottom blown gas is nitrogen, and flow is by less than 1350Nm3/ h control, upper stove tapping after first by converter tipping to 95-100 °
Deslagging is not till dropping down slag, and then top blast nitrogen carries out slag splashing, and flow-control is at 25000-30000Nm3/ h, this phase
Between can carry out slag modification according to slag situation, control dephosphorization phase basicity of slag between 1.0-2.0；
2, the dephosphorization stage
Carrying out the operation of dephosphorization phase after loading molten iron, oxygen rifle top-blown gas is dry hot-air, and flow is by less than 32000Nm3/ h,
End gun bottom blowing gas is oxygen or carbon dioxide, and flow is by less than 350Nm3/ h controls, and rifle position controls by low paramount control,
Adding slagging agent iron ore in batches, addition is 5-15Kg/t steel, adds slag making materials limestone, and addition is less than 10Kg/t
Steel, duration of blast controls between the 1/4-1/3 of total duration of blast, blunderbuss slagging when selecting slag to enliven；
3, the slagging stage
Bottom blown gas switches to argon, and flow is less than 650Nm3/ h, uses the nitrogen purging top of the slag to promote slag sluicing system before slagging,
Flow-control is at 25000-30000Nm3/ h, purge time controls at 1-3min, and rifle position controls, at 4-6 rice, to treat slag in bulk
Deslagging is started after throwing away；Deslagging requires directly to tumble to 75-80 ° body of heater, does not stops in centre, and then slow grate is to closely
Horizontal level, the dead time controls in the 3-5 second, it is desirable to slag as far as possible more to be put, and in controlling stove, level of residue is less than total quantity of slag
1/4；
4, decarburizing phase
Oxygen rifle top-blown gas is oxygen, and end gun bottom blowing gas is argon；The air supply intensity of top blast and bottom blowing all by low paramount control,
Oxygen lance position presses high to low control, and slag material is Calx, magnesium ball or light dolomite, and carbon period controls slag charge and adds total amount not
Less than 40Kg/t steel, control finishing slag content of MgO between 8～12%.
Described slag modification is to add to spatter slag agent containing the special of C and MgO, and addition is 300-600Kg；Terminate spattering slag
Rear addition light dolomite or Calx dry slag, make it fully act on slag by grate, thus solidifies slag, light-burned white clouds
The addition of stone or Calx adjusts according to molten iron silicon content.
Described total duration of blast is 18-20min.
Compared with prior art, the invention has the beneficial effects as follows:
The present invention be a kind of by Blowing Converter technique, stay the techniques such as slag technique, double slag technique, slag recycle to combine together
Converter less-slag blow smelting process again.By changing top and bottom complex blowing gas, slagging regime reduces oxygen and flux consumption.
Improve the cyclic utilization rate of converter slag, improve the profit margin of converter smelting.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is further described:
Following example describe the present invention.These embodiments are only to retouch preferred embodiment of the invention
State, the scope of the present invention is not limited.
Embodiment 1
Smelting process is blown in answering of 180t converter, is divided into slag cure stage, dephosphorization stage, slagging stage, decarburizing phase totally four
In the individual stage, each stage uses different bottom blowings and top-blown gas, uses simultaneously and stay slag and double slag melting technique；Concrete operations
Step is as follows:
1, slag cure stage
Bottom blown gas is nitrogen, and flow presses 1350Nm3/ h controls.After the tapping of upper stove, first deslagging, arrives converter tipping angle
Between 95-100 ° till not dropping down slag, then top blast nitrogen carries out slag splashing, and flow-control exists
25000-30000Nm3/h.If slag peroxidating, added by feed bin and spatter slag agent 300-500kg containing the special of C and MgO,
If slag viscosity matters before spattering slag, less than 2 tons light dolomites can spattered addition after slag terminates, (inclined by grate
Turn between angle ± 45 °) make it fully act on slag, thus solidify slag.Thick with addition of steel scrap finally according to molten iron silicon number
Slag.Control dephosphorization phase basicity of slag between 1.3-1.5.
2, the dephosphorization stage
Carrying out the operation of dephosphorization phase after loading molten iron, oxygen rifle top-blown gas selects the hot-air being dried, flow 32000Nm3/ h,
End gun bottom blowing gas selects oxygen, and flow presses 1350Nm3/ h controls.Rifle position controls by low paramount control, and early stage rifle position controls
Between 1.6-2.0 rice, quick desiliconization and temperature raising, between the 2.0-2.6 rice of later stage rifle position, improve FeO promotion slag in slag,
It is easy to slagging.Adding iron ore 1-3 ton, limestone 1-2 ton during this, limestone need to start i.e. to add in stove in blowing,
Iron ore can divide 1-3 to criticize addition, and duration of blast controls between 5-7min, blunderbuss slagging when selecting slag to enliven.
3, the slagging stage
Bottom blown gas switches to argon, air supply intensity 630Nm3/h.The nitrogen purging top of the slag is used to promote slag sluicing system before slagging,
Flow-control is at 25000-30000Nm3/ h, purge time controls at 1-3min, and rifle position controls, at 4-6 rice, to treat slag in bulk
Deslagging is started after throwing away.Deslagging requires to use more than 2 grades speed to settle at one go body of heater to tumble to 80 ° and do not stop, and 80 ° extremely
Horizontal level uses first gear speed, and the dead time controls in the 3-5 second, and in controlling stove, level of residue is less than the 1/4 of total quantity of slag.
4, decarburizing phase
Oxygen rifle top-blown gas selects oxygen, and end gun bottom blowing gas selects argon.The air supply intensity of top blast and bottom blowing is all by low paramount
Control.Oxygen lance position presses high to low control.Early stage low air supply intensity (top blowing oxygen throughput 28000Nm3/ h, argon bottom-blowing
Flow 800Nm3/ h), high rifle position (2.0-2.5 rice) improves FeO in slag, prevents from returning dry, later stage height air supply intensity (top
Oxygen blast throughput 30000Nm3/ h, argon bottom-blowing flow 1200Nm3/ h), low rifle position (1.6-1.8 rice) strengthens melting bath stirring,
Uniformly decarburization.Slag material selects Calx, magnesium ball or light dolomite, and carbon period controls slag charge and adds total amount 8-10 ton, with
Time control finishing slag content of MgO about 10% by adjusting magnesium ball or light dolomite addition.
Implementation result: after implementing this technique, lime consumption reduces 10-20kg/t, and light dolomite consumes 5-15kg/t, steel
Iron charge consumption reduces about 1-5kg/t, and oxygen consumption reduces about 1-5Nm3/ t, increases nitrogen and consumes about 1-3Nm3/ t, reduces coal
Gas yield is 10-20Nm3/t。
Embodiment 2
Smelting process is blown in answering of 180t converter, is divided into slag cure stage, dephosphorization stage, slagging stage, decarburizing phase totally four
In the individual stage, each stage uses different bottom blowings and top-blown gas, uses simultaneously and stay slag and double slag melting technique；Concrete operations
Step is as follows:
1, slag cure stage
Bottom blown gas is nitrogen, and flow presses 1300Nm3/ h controls.After the tapping of upper stove, first deslagging, arrives converter tipping angle
Between 95-100 ° till not dropping down slag, then top blast nitrogen carries out slag splashing, and flow-control exists
25000-30000Nm3/h.If slag peroxidating, added by feed bin and spatter slag agent 400-600kg containing the special of C and MgO,
If slag viscosity matters before spattering slag, less than 2 tons light dolomites can spattered addition after slag terminates, (inclined by grate
Turn between angle ± 45 °) make it fully act on slag, thus solidify slag.Thick with addition of steel scrap finally according to molten iron silicon number
Slag.Control dephosphorization phase basicity of slag between 1.5-2.0.
2, the dephosphorization stage
Carrying out the operation of dephosphorization phase after loading molten iron, oxygen rifle top-blown gas selects the hot-air being dried, flow 32000Nm3/ h,
End gun bottom blowing gas is carbon dioxide, and flow presses 1300Nm3/ h controls.Rifle position controls by low paramount control, early stage rifle
Position controls between 1.6-2.0 rice, quick desiliconization and temperature raising, between the 2.0-2.6 rice of later stage rifle position, improves FeO in slag and promotees
Evolution slag, it is simple to slagging.Adding iron ore 2-3 ton during this, limestone 1.5-2.0 ton, limestone need to start in blowing
I.e. adding in stove, iron ore can divide 1-3 to criticize addition, and duration of blast controls between 4-6min, selects slag to lift when enlivening
Rifle slagging.
3, the slagging stage
Bottom blown gas switches to argon, air supply intensity 550Nm3/h.The nitrogen purging top of the slag is used to promote slag sluicing system before slagging,
Flow-control is at 28000-30000Nm3/ h, purge time controls at 1-3min, and rifle position controls, at 4-6 rice, to treat slag in bulk
Deslagging is started after throwing away.Deslagging requires to use more than 2 grades speed to settle at one go body of heater to tumble to 80 ° and do not stop, and 80 ° extremely
Horizontal level uses first gear speed, and the dead time controls in the 3-5 second, and in controlling stove, level of residue is less than the 1/4 of total quantity of slag.
4, decarburizing phase
Oxygen rifle top-blown gas selects oxygen, and end gun bottom blowing gas selects argon.The air supply intensity of top blast and bottom blowing is all by low paramount
Control.Oxygen lance position presses high to low control.Early stage low air supply intensity (top blowing oxygen throughput 28000Nm3/ h, argon bottom-blowing
Flow 800Nm3/ h), high rifle position (2.0-2.5 rice) improves FeO in slag, prevents from returning dry, later stage height air supply intensity (top
Oxygen blast throughput 30000Nm3/ h, argon bottom-blowing flow 1200Nm3/ h), low rifle position (1.6-1.8 rice) is strengthened molten bath and is stirred
Mix, uniform decarburization.Slag material selects Calx, magnesium ball or light dolomite, and carbon period controls slag charge and adds total amount 8-10 ton,
Simultaneously by adjusting magnesium ball or light dolomite addition control finishing slag content of MgO about 10%.
Implementation result: after implementing this technique, lime consumption reduces 10-25kg/t, and light dolomite consumes 10-15kg/t,
Steel technology reduces about 1-5kg/t, and oxygen consumption reduces about 5-10Nm3/ t, increases nitrogen and consumes about 1-3Nm3/ t, fall
Low coal-gas recovering amount is 15-20Nm3/t。
Claims (3)
1. an economical converter less-slag blows smelting process again, it is characterised in that be divided into slag cure stage, the dephosphorization stage,
Slagging stage, decarburizing phase altogether four-stage, each stage uses different bottom blowings and top-blown gas, use simultaneously stay slag and
Double slag melting techniques；Concrete operation step is as follows:
1), slag cure stage
Bottom blown gas is nitrogen, and flow is by less than 1350Nm3/ h control, upper stove tapping after first by converter tipping to 95-100 °
Deslagging is not till dropping down slag, and then top blast nitrogen carries out slag splashing, and flow-control is at 25000-30000Nm3/ h, this phase
Between can carry out slag modification according to slag situation, control dephosphorization phase basicity of slag between 1.0-2.0；
2), the dephosphorization stage
Carrying out the operation of dephosphorization phase after loading molten iron, oxygen rifle top-blown gas is dry hot-air, and flow is by less than 32000Nm3/ h,
End gun bottom blowing gas is oxygen or carbon dioxide, and flow is by less than 350Nm3/ h controls, and rifle position controls by low paramount control,
Adding slagging agent iron ore in batches, addition is 5-15Kg/t steel, adds slag making materials limestone, and addition is less than 10Kg/t
Steel, duration of blast controls between the 1/4-1/3 of total duration of blast, blunderbuss slagging when selecting slag to enliven；
3), the slagging stage
Bottom blown gas switches to argon, and flow is less than 650Nm3/ h, uses the nitrogen purging top of the slag to promote slag sluicing system before slagging,
Flow-control is at 25000-30000Nm3/ h, purge time controls at 1-3min, and rifle position controls, at 4-6 rice, to treat slag in bulk
Deslagging is started after throwing away；Deslagging requires directly to tumble to 75-80 ° body of heater, does not stops in centre, and then slow grate is to closely
Horizontal level, the dead time controls in the 3-5 second, it is desirable to slag as far as possible more to be put, and in controlling stove, level of residue is less than total quantity of slag
1/4；
4), decarburizing phase
Oxygen rifle top-blown gas is oxygen, and end gun bottom blowing gas is argon；The air supply intensity of top blast and bottom blowing all by low paramount control,
Oxygen lance position presses high to low control, and slag material is Calx, magnesium ball or light dolomite, and carbon period controls slag charge and adds total amount not
Less than 40Kg/t steel, control finishing slag content of MgO between 8～12%.
The economical converter less-slag of one the most according to claim 1 blows smelting process again, it is characterised in that described stove
Slag modification spatters slag agent for adding containing the special of C and MgO, and addition is 300-600Kg；Spatter add after slag terminates light-burned in vain
Marble or Calx dry slag, make it fully act on slag by grate, thus solidifies slag, adding of light dolomite or Calx
Enter amount to adjust according to molten iron silicon content.
The economical converter less-slag of one the most according to claim 1 blows smelting process again, it is characterised in that described
Total duration of blast is 18-20min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510141695.XA CN106148632B (en) | 2015-03-28 | 2015-03-28 | Economical converter less-slag combined blowing smelting process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510141695.XA CN106148632B (en) | 2015-03-28 | 2015-03-28 | Economical converter less-slag combined blowing smelting process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106148632A true CN106148632A (en) | 2016-11-23 |
| CN106148632B CN106148632B (en) | 2018-01-05 |
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|---|---|---|---|
| CN201510141695.XA Active CN106148632B (en) | 2015-03-28 | 2015-03-28 | Economical converter less-slag combined blowing smelting process |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108998620A (en) * | 2018-09-27 | 2018-12-14 | 马鞍山钢铁股份有限公司 | A kind of slag-iron separation method |
| CN109913613A (en) * | 2019-04-01 | 2019-06-21 | 攀钢集团攀枝花钢铁研究院有限公司 | The half steel of rapid slagging lacks slag dephosphorization smelting process |
| CN110205437A (en) * | 2019-07-10 | 2019-09-06 | 攀钢集团攀枝花钢铁研究院有限公司 | The method for reducing TFe content in semi-steel making converter finishing slag |
| CN112226579A (en) * | 2020-09-07 | 2021-01-15 | 上海大学 | Method for promoting slagging of lime in dephosphorization period by converter steelmaking process with double-slag method |
| CN112708719A (en) * | 2020-12-15 | 2021-04-27 | 安徽长江钢铁股份有限公司 | Converter steelmaking method by replacing full amount of scrap steel with iron slag |
| CN112899430A (en) * | 2021-01-14 | 2021-06-04 | 安徽工业大学 | Method for improving energy utilization efficiency in converter |
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|---|---|---|---|---|
| CN101691622A (en) * | 2009-09-25 | 2010-04-07 | 首钢总公司 | Converter dephosphorization pretreatment and slagless decarburization method |
| CN102212640A (en) * | 2011-06-01 | 2011-10-12 | 首钢总公司 | Convertor steelmaking method capable of reducing slag quantity |
| CN102965465A (en) * | 2012-11-21 | 2013-03-13 | 首钢总公司 | Method for curing converter slag |
| CN103773919A (en) * | 2014-02-18 | 2014-05-07 | 钢铁研究总院 | Method for smelting middle-high phosphorus molten iron in converter |
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2015
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101691622A (en) * | 2009-09-25 | 2010-04-07 | 首钢总公司 | Converter dephosphorization pretreatment and slagless decarburization method |
| CN102212640A (en) * | 2011-06-01 | 2011-10-12 | 首钢总公司 | Convertor steelmaking method capable of reducing slag quantity |
| CN102965465A (en) * | 2012-11-21 | 2013-03-13 | 首钢总公司 | Method for curing converter slag |
| CN103773919A (en) * | 2014-02-18 | 2014-05-07 | 钢铁研究总院 | Method for smelting middle-high phosphorus molten iron in converter |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108998620A (en) * | 2018-09-27 | 2018-12-14 | 马鞍山钢铁股份有限公司 | A kind of slag-iron separation method |
| CN109913613A (en) * | 2019-04-01 | 2019-06-21 | 攀钢集团攀枝花钢铁研究院有限公司 | The half steel of rapid slagging lacks slag dephosphorization smelting process |
| CN110205437A (en) * | 2019-07-10 | 2019-09-06 | 攀钢集团攀枝花钢铁研究院有限公司 | The method for reducing TFe content in semi-steel making converter finishing slag |
| CN112226579A (en) * | 2020-09-07 | 2021-01-15 | 上海大学 | Method for promoting slagging of lime in dephosphorization period by converter steelmaking process with double-slag method |
| CN112708719A (en) * | 2020-12-15 | 2021-04-27 | 安徽长江钢铁股份有限公司 | Converter steelmaking method by replacing full amount of scrap steel with iron slag |
| CN112708719B (en) * | 2020-12-15 | 2022-03-15 | 安徽长江钢铁股份有限公司 | Converter steelmaking method by replacing full amount of scrap steel with iron slag |
| CN112899430A (en) * | 2021-01-14 | 2021-06-04 | 安徽工业大学 | Method for improving energy utilization efficiency in converter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106148632B (en) | 2018-01-05 |
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