CN108624735A - A method of low phosphorus steel by smelting is consumed based on the low slag charge of high-silicon high ferrophosphorus water converter - Google Patents
A method of low phosphorus steel by smelting is consumed based on the low slag charge of high-silicon high ferrophosphorus water converter Download PDFInfo
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- CN108624735A CN108624735A CN201810339419.8A CN201810339419A CN108624735A CN 108624735 A CN108624735 A CN 108624735A CN 201810339419 A CN201810339419 A CN 201810339419A CN 108624735 A CN108624735 A CN 108624735A
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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
- C21C5/30—Regulating or controlling the blowing
- C21C5/35—Blowing from above and through the bath
-
- 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
- C21C5/36—Processes yielding slags of special composition
-
- 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
Abstract
The present invention relates to steel technological process smelting process method, in particular to a kind of methods consuming low phosphorus steel by smelting based on the low slag charge of high-silicon high ferrophosphorus water converter, include the following steps：Entering stove molten iron 0.55%≤Si≤0.8%, single-slag practice is used under conditions of 0.17%≤P≤0.22%；Molten iron temperature is more than 1250 DEG C, scrap ratio>25%；It is added using few slag charge and smelts model cootrol auxiliary material addition.When generally entering stove molten iron [Si] >=0.6% or [P] >=0.12%, converter uses duplex practice or double slag process.Present invention operation is in the case of " three the is de- " pretreatment of no molten iron and converter duplex method dephosphorization, using single slag process, under the premise of realizing that converter lime consumption is less than 40kg/t, new slag charge total amount consumed is less than 70kg/t, simultaneously, when ensureing smelting endpoint [C] >=0.065%, [P]<0.012%.New slag charge consumption when the present invention can effectively reduce high-silicon high ferrophosphorus water converter smelting advantageously reduces the generation of industrial waste, reduces ton steel production cost.
Description
Technical field
The present invention relates to steel technological process smelting control methods, in particular to one kind being based on the low slag charge of high-silicon high ferrophosphorus water converter
The method for consuming low phosphorus steel by smelting.
Background technology
Blast furnace ironmaking process category reducing atmosphere, the phosphorus quilt in blast furnace raw material (iron ore, sinter, pelletizing, coke, lime etc.)
Reduction enters molten iron, and blast furnace ironmaking process can not dephosphorization.Under no molten iron " three is de- " pretreatment condition, the phosphorus in molten iron is main
Oxidation removal is carried out by converter.It is blast-melted to be directly entered converter and blow, due to containing the members such as higher Si, P in molten iron
Element, converter not only want decarburization to heat up, but also to undertake desiliconization, dephosphorization task.Molten iron silicon content is high, needs to be added a large amount of
Lime makes the slag of high alkalinity, and the converter quantity of slag increases；And the addition of high-silicon high ferrophosphorus water usually need by sublance and other
Thermometric is surveyed into subset progress assistant analysis, to ensure the phosphorus content in steel being reduced to steel grade requirement level, is grasped to converter work
Make proposition baptism.This big quantity of slag converting method causes that recovery rate of iron is low, solvent consumption is high, viscous rifle and splash are serious.
The presence of these problems, makes steel-making cost be significantly increased.Currently, steel-making cost will be reduced by the steel industry of market orientation
Consideration and urgent problem to be solved as priority.
For the converter smelting process of single slag, the adjustment on opportunity is added by rifle position control and auxiliary material and remaining slag operation makes up stone
The slow deficiency of grey slugging improves basicity early period under the conditions of bessemerizing the advantageous dephosphorization of low temperature early period, improves dephosphorization rate early period；
Further decreasing for supplementary product onsumption may be implemented by the recycling of tailings and rational process optimization simultaneously.It therefore, can be with
Under conditions of meeting terminal tapping phosphorus content requirement, the additional proportion of supplementary product kind is rationally adjusted, to ensure terminal clinker alkali
Degree reduces lime and dolomite consumption, ensures terminal dephosphorization rate, reduces the consumption of ton slag doses.
Invention content
The purpose of the present invention is to provide a kind of methods consuming low phosphorus steel by smelting based on the low slag charge of high-silicon high ferrophosphorus water converter.Its
It makes full use of stove terminal to stay slag, and industrial waste tailings is added, advanced optimize process operation, stove converter is as early as possible under promotion
While slagging, slag charge consumption is reduced.
A method of low phosphorus steel by smelting is consumed based on the low slag charge of high-silicon high ferrophosphorus water converter, it is characterised in that：Processing step is：
Slag is stayed without terminal after molten iron " three is de- " pretreated high-silicon high ferrophosphorus water → top and bottom combined blown converter list slag melting → converter tapping
→ slag splashing；Top and bottom combined blown converter is using single slag remaining slag operation, under the premise of low slag charge consumes, steel when realizing converter tapping
Liquid phosphorus content is less than 0.012%.
Concrete operation step is as follows：
S01 enters stove molten iron 0.55%≤Si≤0.8%, 0.17%≤P≤0.22% using single-slag practice；
S02 is added using few slag charge and smelts model cootrol auxiliary material addition：The total addition of lime, dolomite, tailings, sludge ball
≤70kg/t；
S03, molten iron charging temperature are more than 1250 DEG C, scrap ratio>25%；
S04, top blast rifle position：Rifle position is down to 1900-1910mm to start to blow, is kept for 2.8-3.2 minutes, Fast Slag Melting；Decarburization
Period uses 2100-2110mm rifle positions, keeps the rifle position 5.5-6.5 minutes, hereafter keeps 2-2.5 points of 1895-1900mm rifle positions
Clock proposes rifle, thermometric, tapping after pressing rifle about 30 seconds.
S05, bottom blowing intensity：Beforehand control bottom blowing intensity is 0.05m3/ (mint), mid-term 0.03m3/ (mint), later stage
For 0.05m3/(min·t)；
S06, slag control：The control of initial smelting period basicity of slag ensures to take off dephosphorization rate 60% or more early period 2.0 or so；Eventually
For point basicity of slag 3.2 or so, finishing slag iron oxide is 14%-20%；
S07, terminal point control target：Tapping carbon content>0.065%, phosphorus of tapping<0.012%,
Slag is stayed in S08, tapping：Stay the quantity of slag according to terminal P2O5% contents selectively stay slag, may be used and complete stay slag, partly stay slag, no
Remaining slag operation；As terminal P2O5% ＞ 3.8%, using not staying slag；As 3.0%≤P of terminal2O5% ＜ 3.8%, the quantity of slag are more than 10
Ton hour, using slag is partly stayed, the quantity of slag is less than 8 ton hours, using staying slag entirely.
Further, step S02 specifically includes following steps：
S021 is blown simultaneously opening, and the slag charge mixed by lime, dolomite, tailings is added into converter, and addition is
Iron and steel stock (molten iron+steel scrap) 45kg, i.e. 45kg/t per ton；Wherein dolomite, tailings are all added opening the when of blowing, according to furnace temperature,
Upper stove stays slag situation and molten iron condition suitably to adjust lime adding amount；
After oxygen blast 30%, according to slugging situation, lime and sludge ball, addition 15- is added in S022 into converter in right amount
20kg/t。
Further, addition dolomite 15-18kg/t, tailings 8-10kg/t while blowing is opened；It is blown within 1 minute opening, lime
12-17kg/t is added；Lime 8-13kg/ is added according to practical converter slag temperature, viscosity concrete condition after oxygen blast 30%
3-8kg/t is added in t, pellet.
Further, phosphorus pentoxide content≤0.034% in lime, phosphorus pentoxide content≤0.034% in dolomite, tail
Phosphorus pentoxide content≤1.39% in slag, phosphorus pentoxide content≤0.033% in sludge ball.
The present invention compared with the prior art, has the following advantages and advantageous effect：
(1) present invention is easy to operate is easy to grasp, in the case of " three the is de- " pretreatment of no molten iron and converter duplex method dephosphorization, root
Enter stove molten iron condition according to high-silicon high phosphorus, using single-slag practice, does not fall stove in smelting process, realize that converter lime consumption is less than
40kg/t, control requirement of total slag charge consumption less than 70kg/t.Compared to duplex and double slag process, the present invention does not fall midway stove, raw
It is fast to produce rhythm, it is easy to operate, it is easy to grasp, while scrap ratio is high.
(2) scrap ratio of the present invention>25%.It is provided a method to improve converter adding amount of scrap steel, is conducive to improve metal receipts
Yield reduces production cost.
(3) be conducive to industrial waste recycling, especially tailings added with tailings and sludge ball in auxiliary material of the present invention.Tailings is to turn
The slag charge that clinker is 15% by all iron content after magnetic separation；Sludge ball is that by recycling, ball processed uses converter dust again.
(4) when the present invention can realize converter smelting endpoint [C] >=0.065%, [P]<0.012%, and converter slag charge addition is low,
Recovery rate of iron is high, can effectively reduce ton steel cost.
Specific implementation mode
The present invention is described in further details with reference to example, embodiments of the present invention are not limited thereto.
Embodiment 1
Steel scrap 32t is added in molten iron 105t.Molten iron Si contents are 0.6591%, and molten iron P content is 0.179%, molten iron temperature 1373
DEG C, stay slag method to be operated with addition of tailings using single slag.The heat is opened there are upper stove finishing slag 5t or so and blows while being added simultaneously
Lime 10kg/t is added in 29.4kg/t lime, dolomite 18kg/t, tailings 12kg/t before oxygen blast 30%.Total slag charge
69.4kg/t.Terminal P is 0.0129%.
It is handled essentially according to following steps：
(1) heat stays slag+single slag process low phosphorus steel by smelting on, stays 5t or so terminal high oxidative clinkers in stove after tapping；
(2) enter the control of stove molten iron condition in 0.55%≤Si≤0.8%, 0.18%≤P≤0.22%；
(3) addition of auxiliary material opens and blows while being added 29.4kg/t lime, dolomite 18kg/t, tailings 12kg/t, in oxygen blast 30%
Lime 10kg/t is added before.Total slag charge 69.4kg/t.
(4) process rifle position controls：It opens to blow and rifle position is first down to 1905mm blows, kept for 3 minutes, Fast Slag Melting, carbon period
Between use 2107mm rifle positions, keep the rifle position 6 minutes, hereafter keep 1897mm rifle positions 2 minutes, carry rifle after 30 seconds in pressure, survey
Temperature, tapping；
(5) Bottom Blowing Flow Rate Control：Dephosphorization phase N2Bottom blowing flow 0.05Nm3/ h, carbon period N2Bottom blowing flow 0.03Nm3/ h or so,
Smelt later stage Ar control bottom blowing 0.05Nm3/h；
(6) terminal point control：Tapping carbon content 0.08%, phosphorus 0.012% of tapping, terminal basicity of slag 3.1, finishing slag iron oxide exist
16%；
By above-mentioned control, while smelting meets the molten steel of component requirements, using staying slag+single slag process to operate, by ton slag
Doses is controlled in 70kg/t.
Embodiment 2
Steel scrap 32t is added in molten iron 104.5t.The present embodiment compared with embodiment 1, difference click through be smelting slag addition and
The difference of tapping temperature and endpoint carbon content.Molten iron Si contents are 0.59%, and terminal P content is 0.1879%, and molten iron temperature is
It 1360 DEG C, is operated using slag+single slag process is stayed.The heat is opened there are upper heat finishing slag 5t or so and blows while being added simultaneously
Lime 18kg/t, dolomite 16.6kg/t, pellet is added before oxygen blast 30% in 16kg/t lime, dolomite 16.6kg/t
2kg/t, terminal C are 0.09%, and terminal P is 0.012%.Total slag charge 69.2kg/t.
Embodiment 3
Steel scrap 31t is added in molten iron 104.66t.For the present embodiment compared with embodiment 1, difference, which clicks through, is smelting slag addition
With tapping temperature and the difference of endpoint carbon content.Molten iron Si contents are 0.5788%, and terminal P content is 0.170%, molten iron temperature
It is 1360 DEG C, is operated using slag+single slag process is stayed.The heat is opened there are upper heat finishing slag 5t or so and blows while being added simultaneously
33kg/t lime, dolomite 11.8kg/t, tailings 12kg/t；Dolomite 5kg/t, pellet 8kg/t are added before oxygen blast 30%,
Terminal C is 0.09%, and terminal P is 0.0119%.Total slag charge 69.8g/t.
As described above, the present invention can be realized preferably.
The above specific implementation mode is the random embodiment of the present invention, can not be defined to the claim of the present invention,
Its any change made away from technical scheme of the present invention two or other equivalent substitute modes are included in the present invention's
Within protection domain.
The present invention discloses a kind of method based on high-silicon high ferrophosphorus water converter smelting Low-phosphorus Steel, which is characterized in that including following step
Suddenly：(1) single-slag practice is used, is controlled into stove molten iron 0.55%≤Si≤0.8%, 0.17%≤P≤0.22%；(2) it adopts
It is added with few slag charge and smelts model cootrol auxiliary material addition：Total addition≤the 70kg/t of lime, dolomite, tailings, sludge ball；
(3) thermometrics such as sublance, survey are not used on the way into subset in entire blowing, " rifle is on earth " improves steel-making efficiency；(4) top blast
Rifle position：It opens to blow and rifle position is first down to 1905mm blows, kept for 3 minutes, Fast Slag Melting, 2107mm rifles are used during decarburization
Position, keeps the rifle position 6 minutes, hereafter keeps 1897mm rifle positions 2 minutes, and rifle, thermometric, tapping are proposed after 30 seconds in pressure.(5) bottom blowing
Service life and intensity：(6) beforehand control target：Initial smelting period basicity is controlled 2.0 or so, dephosphorization rate is 60% or more；(7) terminal
Control targe：Tapping carbon content>0.065%, phosphorus of tapping<0.012%, 3.2 or so, finishing slag iron oxide exists terminal basicity of slag
14%-20%；(8) slag is stayed in tapping：Stay the quantity of slag according to terminal P2O5% contents selectively stay slag, may be used and stay slag entirely, partly stay
Slag, not remaining slag operation；
In order to more fully illustrate the effect of the present invention, related description, 120t top and bottom complex blowings are carried out with actual test data now
Converter list slag stays slag method with addition of tailings low phosphorus steel by smelting, and different heat converter slag charge consumption are as shown in table 1.
1 vessel slag doses of table consumes
Above each heat, converter lime are less than 40kg/t, and total slag charge is less than 70kg/t, realizes converter slag charge small amount
Control targe.
Present invention process flow simple operations are convenient, can effectively realize the reduction purpose of converter slag charge addition.
Claims (5)
1. a kind of method consuming low phosphorus steel by smelting based on the low slag charge of high-silicon high ferrophosphorus water converter, it is characterised in that：Processing step
For：It is stayed without terminal after molten iron " three is de- " pretreated high-silicon high ferrophosphorus water → top and bottom combined blown converter list slag melting → converter tapping
Slag → slag splashing；Top and bottom combined blown converter is using single slag remaining slag operation, under the premise of low slag charge consumes, when realizing converter tapping
Molten steel phosphorus content is less than 0.012%.
2. a kind of method that low phosphorus steel by smelting is consumed based on the low slag charge of high-silicon high ferrophosphorus water converter according to claim 1,
It is characterized in that, concrete operation step is as follows：
S01 enters stove molten iron 0.55%≤Si≤0.8%, 0.17%≤P≤0.22% using single-slag practice；
S02 is added using few slag charge and smelts model cootrol auxiliary material addition：The total addition of lime, dolomite, tailings, sludge ball
≤70kg/t；
S03, molten iron charging temperature are more than 1250 DEG C, scrap ratio>25%；
S04, top blast rifle position：Rifle position is down to 1900-1910mm to start to blow, is kept for 2.8-3.2 minutes, Fast Slag Melting；Decarburization
Period uses 2100-2110mm rifle positions, keeps the rifle position 5.5-6.5 minutes, hereafter keeps 2-2.5 points of 1895-1900mm rifle positions
Clock proposes rifle, thermometric, tapping after pressing rifle 30 seconds；
S05, bottom blowing intensity：Beforehand control bottom blowing intensity is 0.05m3/ (mint), mid-term 0.03m3/ (mint), later stage
For 0.05m3/(min·t)；
S06, slag control：The control of initial smelting period basicity of slag is 2.0, ensures to take off early period dephosphorization rate 60% or more；Terminal stove
Basicity of slag is 3.2, and finishing slag iron oxide is 14%-20%；
S07, terminal point control target：Tapping carbon content>0.065%, phosphorus of tapping<0.012%；
Slag is stayed in S08, tapping：Stay the quantity of slag according to terminal P2O5% contents selectively stay slag, are stayed slag using complete, are partly stayed slag, do not stay slag to grasp
Make；As terminal P2O5% ＞ 3.8%, using not staying slag；As 3.0%≤P of terminal2O5% ＜ 3.8%, the quantity of slag are more than 10 ton hours, adopt
With slag is partly stayed, the quantity of slag is less than 8 ton hours, using staying slag entirely.
3. a kind of method that low phosphorus steel by smelting is consumed based on the low slag charge of high-silicon high ferrophosphorus water converter according to claim 2,
It is characterized in that, step S02 specifically includes following steps：
S021 is blown simultaneously opening, and the slag charge mixed by lime, dolomite, tailings is added into converter, and addition is
Iron and steel stock (molten iron+steel scrap) 45kg, i.e. 45kg/t per ton；Wherein dolomite, tailings are all added opening the when of blowing, according to furnace temperature,
Upper stove stays slag situation and molten iron condition suitably to adjust lime adding amount；
After oxygen blast 30%, according to slugging situation, lime and sludge ball, addition 15- is added in S022 into converter in right amount
20kg/t。
4. a kind of method that low phosphorus steel by smelting is consumed based on the low slag charge of high-silicon high ferrophosphorus water converter according to claim 3,
It is characterized in that opening addition dolomite 15-18kg/t, tailings 8-10kg/t while blowing；It is blown within 1 minute opening, lime is added
12-17kg/t；Lime 8-13kg/t, ball are added according to practical converter slag temperature, viscosity concrete condition after oxygen blast 30%
3-8kg/t is added in nodulizing.
5. a kind of method that low phosphorus steel by smelting is consumed based on the low slag charge of high-silicon high ferrophosphorus water converter according to claim 4,
Phosphorus pentoxide content≤0.034% in lime, phosphorus pentoxide content≤0.034% in dolomite, five oxidations two in tailings
Phosphorus content≤1.39%, phosphorus pentoxide content≤0.033% in sludge ball.
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| CN201810339419.8A CN108624735B (en) | 2018-04-16 | 2018-04-16 | Method for smelting low-phosphorus steel based on low slag charge consumption of high-silicon high-phosphorus molten iron converter |
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|---|---|---|---|
| CN201810339419.8A CN108624735B (en) | 2018-04-16 | 2018-04-16 | Method for smelting low-phosphorus steel based on low slag charge consumption of high-silicon high-phosphorus molten iron converter |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109280731A (en) * | 2018-10-24 | 2019-01-29 | 北京科技大学 | The method of the high phosphorus hot metal production steel of converter terminal P≤0.01% is smelted using few slag charge |
| CN109778054A (en) * | 2019-01-14 | 2019-05-21 | 包头钢铁（集团）有限责任公司 | A kind of process using high phosphorus hot metal production ultra-low phosphoretic steel |
| CN110079639A (en) * | 2019-06-10 | 2019-08-02 | 成渝钒钛科技有限公司 | A kind of method that steelmaking converter reduces slag charge |
| CN112442574A (en) * | 2020-11-20 | 2021-03-05 | 新疆八一钢铁股份有限公司 | High-silicon molten iron single slag control method |
| WO2021212581A1 (en) * | 2020-04-24 | 2021-10-28 | 南京钢铁股份有限公司 | Method for producing nickel-based steel from high phosphorus molten iron |
| CN113930575A (en) * | 2021-09-23 | 2022-01-14 | 包头钢铁（集团）有限责任公司 | Converter double-slag smelting method for high-silicon high-phosphorus molten iron |
| CN115044730A (en) * | 2022-06-22 | 2022-09-13 | 包头钢铁（集团）有限责任公司 | Control method of 150t converter high-phosphorus high-silicon double-slag model |
| CN115109887A (en) * | 2022-07-20 | 2022-09-27 | 北京科技大学 | Converter smelting process selection method |
| CN115261549A (en) * | 2022-06-22 | 2022-11-01 | 包头钢铁（集团）有限责任公司 | Control method for 150t converter high-phosphorus high-silicon single slag model |
| CN115323098A (en) * | 2022-07-21 | 2022-11-11 | 北京科技大学 | High scrap steel ratio converter smelting process for producing high-quality and special steel |
| CN115807145A (en) * | 2022-11-28 | 2023-03-17 | 天津钢铁集团有限公司 | Control method for adjusting temperature by using tailings |
| EP4215627A4 (en) * | 2021-05-20 | 2024-03-06 | Laiwu Steel Yinshan Section Co Ltd | Low-cost smelting method for polar-use steel using ultra-high phosphorus molten iron |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109280731A (en) * | 2018-10-24 | 2019-01-29 | 北京科技大学 | The method of the high phosphorus hot metal production steel of converter terminal P≤0.01% is smelted using few slag charge |
| CN109280731B (en) * | 2018-10-24 | 2020-11-06 | 北京科技大学 | Method for producing steel with converter end point P less than or equal to 0.01% by smelting high-phosphorus molten iron by adopting less slag materials |
| CN109778054A (en) * | 2019-01-14 | 2019-05-21 | 包头钢铁（集团）有限责任公司 | A kind of process using high phosphorus hot metal production ultra-low phosphoretic steel |
| CN110079639A (en) * | 2019-06-10 | 2019-08-02 | 成渝钒钛科技有限公司 | A kind of method that steelmaking converter reduces slag charge |
| WO2021212581A1 (en) * | 2020-04-24 | 2021-10-28 | 南京钢铁股份有限公司 | Method for producing nickel-based steel from high phosphorus molten iron |
| CN112442574A (en) * | 2020-11-20 | 2021-03-05 | 新疆八一钢铁股份有限公司 | High-silicon molten iron single slag control method |
| EP4215627A4 (en) * | 2021-05-20 | 2024-03-06 | Laiwu Steel Yinshan Section Co Ltd | Low-cost smelting method for polar-use steel using ultra-high phosphorus molten iron |
| CN113930575A (en) * | 2021-09-23 | 2022-01-14 | 包头钢铁（集团）有限责任公司 | Converter double-slag smelting method for high-silicon high-phosphorus molten iron |
| CN115044730B (en) * | 2022-06-22 | 2023-08-08 | 包头钢铁（集团）有限责任公司 | Control method for 150t converter high-phosphorus high-silicon double-slag model |
| CN115261549A (en) * | 2022-06-22 | 2022-11-01 | 包头钢铁（集团）有限责任公司 | Control method for 150t converter high-phosphorus high-silicon single slag model |
| CN115261549B (en) * | 2022-06-22 | 2023-09-26 | 包头钢铁（集团）有限责任公司 | Control method for 150t converter high-phosphorus high-silicon single slag model |
| CN115044730A (en) * | 2022-06-22 | 2022-09-13 | 包头钢铁（集团）有限责任公司 | Control method of 150t converter high-phosphorus high-silicon double-slag model |
| CN115109887A (en) * | 2022-07-20 | 2022-09-27 | 北京科技大学 | Converter smelting process selection method |
| CN115323098A (en) * | 2022-07-21 | 2022-11-11 | 北京科技大学 | High scrap steel ratio converter smelting process for producing high-quality and special steel |
| CN115323098B (en) * | 2022-07-21 | 2023-08-22 | 北京科技大学 | High scrap ratio converter smelting process for producing high grade steel |
| CN115807145A (en) * | 2022-11-28 | 2023-03-17 | 天津钢铁集团有限公司 | Control method for adjusting temperature by using tailings |
| CN115807145B (en) * | 2022-11-28 | 2024-03-08 | 天津钢铁集团有限公司 | Control method for adjusting temperature by utilizing tailings |
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