CN114657315A - Slagging dephosphorization agent for converter steelmaking and dephosphorization process - Google Patents
Slagging dephosphorization agent for converter steelmaking and dephosphorization process Download PDFInfo
- Publication number
- CN114657315A CN114657315A CN202210330632.9A CN202210330632A CN114657315A CN 114657315 A CN114657315 A CN 114657315A CN 202210330632 A CN202210330632 A CN 202210330632A CN 114657315 A CN114657315 A CN 114657315A
- Authority
- CN
- China
- Prior art keywords
- slagging
- agent
- dephosphorization
- slag
- percent
- 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
- 238000009628 steelmaking Methods 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 title claims description 11
- 230000008569 process Effects 0.000 title claims description 11
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 57
- 239000002893 slag Substances 0.000 claims abstract description 29
- 230000008018 melting Effects 0.000 claims abstract description 20
- 238000002844 melting Methods 0.000 claims abstract description 20
- 239000007800 oxidant agent Substances 0.000 claims abstract description 17
- 230000001590 oxidative effect Effects 0.000 claims abstract description 14
- 239000000126 substance Substances 0.000 claims abstract description 8
- 239000007921 spray Substances 0.000 claims abstract description 6
- 238000005507 spraying Methods 0.000 claims abstract description 6
- 229910052698 phosphorus Inorganic materials 0.000 claims description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 7
- 230000004907 flux Effects 0.000 claims description 7
- 229910052760 oxygen Inorganic materials 0.000 claims description 7
- 239000001301 oxygen Substances 0.000 claims description 7
- 229910052791 calcium Inorganic materials 0.000 claims description 6
- 229910052748 manganese Inorganic materials 0.000 claims description 6
- 238000007664 blowing Methods 0.000 claims description 5
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 abstract description 28
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 abstract description 27
- 239000000292 calcium oxide Substances 0.000 abstract description 16
- 230000000694 effects Effects 0.000 abstract description 10
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 abstract description 7
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 abstract description 6
- 239000010436 fluorite Substances 0.000 abstract description 6
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 4
- 230000007547 defect Effects 0.000 abstract description 4
- 229910001635 magnesium fluoride Inorganic materials 0.000 abstract description 4
- 239000000956 alloy Substances 0.000 abstract description 3
- 229910045601 alloy Inorganic materials 0.000 abstract description 3
- 239000006184 cosolvent Substances 0.000 abstract description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 26
- 229910000831 Steel Inorganic materials 0.000 description 14
- 239000010959 steel Substances 0.000 description 14
- 229910052742 iron Inorganic materials 0.000 description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 229910052593 corundum Inorganic materials 0.000 description 6
- 239000010431 corundum Substances 0.000 description 6
- 239000010439 graphite Substances 0.000 description 6
- 229910002804 graphite Inorganic materials 0.000 description 6
- 239000011575 calcium Substances 0.000 description 5
- 239000011572 manganese Substances 0.000 description 5
- 239000011574 phosphorus Substances 0.000 description 4
- 229910019142 PO4 Inorganic materials 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 229910052731 fluorine Inorganic materials 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 235000021317 phosphate Nutrition 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 229910001634 calcium fluoride Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 230000005496 eutectics Effects 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 2
- 239000010452 phosphate Substances 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- -1 phosphorus compound Chemical class 0.000 description 1
- 229910001392 phosphorus oxide Inorganic materials 0.000 description 1
- LFGREXWGYUGZLY-UHFFFAOYSA-N phosphoryl Chemical class [P]=O LFGREXWGYUGZLY-UHFFFAOYSA-N 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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
- 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
-
- 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
- C21C7/064—Dephosphorising; Desulfurising
- C21C7/0645—Agents used for dephosphorising or desulfurising
Abstract
The invention discloses a slagging and dephosphorizing agent for converter steelmaking, belonging to the technical field of metallurgical engineering and comprising an oxidant, a slagging agent and a fluxing agent; the oxidant is O2Spraying by using a spray gun; the slag former is CaO and FeO; the mass ratio of the CaO to the FeO is 7-8: 11. The fluxing agent used in the invention has similar chemical properties with fluorite, has lower melting point, can better reduce the melting point of a slag system, and has better slag melting and fluxing effects; in addition, the high-temperature-resistant alloy contains a large amount of elements such as Na and Al, and can effectively reduce the generation of HF and SiF at high temperature4、MgF2The probability of fluoride is equal, so that the pollution corrosion defect of the cosolvent is improved, and the energy-saving and environment-friendly requirements are met; by optimizing the dephosphorization processing technological parameters, the invention can increase the content of calcium oxide and ferrous oxide dissolved in the slag, activate the early-stage slag, further remarkably improve the slagging rate and improve the slagging effect, thereby improving the dephosphorization effect.
Description
Technical Field
The invention belongs to the technical field of metallurgical engineering, and particularly relates to a slagging and dephosphorizing agent for converter steelmaking and a dephosphorizing process.
Background
The dephosphorizing agent is added into the molten iron or on the surface of the molten iron in various ways to react with phosphorus in the molten iron to generate a phosphorus compound, so that the phosphorus is fixed in slag or enters a gas phase to achieve the aim of pre-dephosphorizing the molten iron. The molten iron dephosphorization agent mainly comprises an oxidant, a slagging agent and a fluxing agent. The oxidant is used for supplying oxygen to oxidize phosphorus in the molten iron into P2O5So that the phosphate is combined with the slag former to form phosphate and is left in the dephosphorized slag. The oxidant is typically a gaseous oxidant (mainly O)2) And solid oxidizing agents (rolled steel sheet,Iron ore, sintered return ore, manganese ore, etc.). The applied slag formers mainly have two types: soda (Na)2CO3) And lime (CaO) systems, which act to solidify silicon, phosphorus oxides, form stable silicates or phosphates, and lower the slag melting point. The added fluxing agent is fluorite and the like, and is used for improving the flowing property of the dephosphorization slag, simultaneously activating dephosphorization reaction and strengthening dephosphorization effect.
However, the flux used in the prior art, the main elements in fluorite, are F and Ca. CaF2As the main component of fluorite, the slag melting fluxing agent has good slag melting fluxing effect, but CaF2A large amount of HF and SiF are generated under the high-temperature reaction in the furnace4、MgF2When fluoride gas enters the atmosphere, some unreacted solid phase fluoride exists in waste slag and enters the soil, so that the environment is seriously polluted; in addition, with the continuous improvement of the requirements on the steel quality, the dephosphorization effect of the existing dephosphorization agent needs to be further improved.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a slagging and dephosphorizing agent for converter steelmaking and a dephosphorizing process.
The purpose of the invention can be realized by the following technical scheme:
a slagging and dephosphorizing agent for converter steelmaking comprises an oxidant, a slagging agent and a fluxing agent;
the oxidant is O2Spraying by using a spray gun;
the slag former is CaO and FeO;
the mass ratio of the CaO to the FeO is 7-8: 11;
the flux comprises the following chemical components in percentage by mass: f22.5 percent; 11.5 percent of Na; 32.5 percent of Al; 1.38 percent of Ca; C. si, Mn, P and the like are less than 2 percent, and the balance is O element;
the melting point of the fluxing agent is 633 ℃, and the using amount of the fluxing agent is 11-13% of the mass of the slagging constituent;
the fluxing agent used in the invention has similar chemical properties with fluorite and lower melting point, and the fluorine element contained in the fluxing agent can form fluoride or eutectic with calcium oxide with low melting point, so that the fluxing agent can be used in the inventionThe melting point of a slag system is better reduced, and the slag melting and fluxing effects are better; in addition, the high-temperature-resistant alloy contains a large amount of elements such as Na and Al, and can effectively reduce the generation of HF and SiF at high temperature4、MgF2The probability of fluoride is equal, so that the pollution corrosion defect of the cosolvent is improved, and the energy-saving and environment-friendly requirements are met;
the dephosphorization process comprises the following specific steps:
the first step, the lance position is controlled at 1550mm in 1500-year-old and the oxygen supply flow is controlled at 16500m in 15500-year-old in the early stage of smelting3Flow rate of bottom blowing 380-3H, oxygen supply treatment is carried out for 60-80 s;
secondly, adding FeO and a fluxing agent in the slagging agent, treating for 15-20s, adjusting the lance position, raising the lance position by 150-200mm, adding CaO, wherein the CaO is added to further accelerate the melting speed, so that slagging is easy, and continuously treating for 90-120 s;
in the oxygen blowing process, the lance position is set at 1500-1550mm, and the blowing time is 60-80 s; in order to further improve the slag melting rate, after blowing for 60-80s, the lance position is adjusted again and is raised by 150-200mm, and the main purpose of the operation is to increase ferrous oxide in the slag so as to promote the lime to dissolve as soon as possible, thus being beneficial to the slag cheating before activation.
The invention has the beneficial effects that:
the fluxing agent used in the invention has similar chemical properties with fluorite and lower melting point, and the fluorine element contained in the fluxing agent can form fluoride or eutectic with calcium oxide with low melting point, so that the melting point of a slag system can be better reduced, and the fluxing effect of slagging is better; in addition, the high-temperature-resistant and corrosion-resistant alloy contains a large amount of elements such as Na and Al, and can effectively reduce the generation of HF and SiF at high temperature4、MgF2The probability of fluoride is equal, so that the pollution corrosion defect of the cosolvent is improved, and the requirements of energy conservation and environmental protection are met;
by optimizing the dephosphorization processing technological parameters, the invention can increase the content of calcium oxide and ferrous oxide dissolved in the slag, activate the early-stage slag, further remarkably improve the slagging rate and improve the slagging effect, thereby improving the dephosphorization effect.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The slagging and dephosphorizing agent for converter steelmaking comprises an oxidant, a slagging agent and a fluxing agent;
the oxidizing agent being O2Spraying by using a spray gun;
the slag former is CaO and FeO;
the mass ratio of the CaO to the FeO is 7: 11;
the flux comprises the following chemical components in percentage by mass: f22.5 percent; 11.5 percent of Na; al32.5%; 1.38 percent of Ca; C. si, Mn, P and the like are less than 2 percent, and the balance is O element;
the melting point of the fluxing agent is 633 ℃, and the dosage of the fluxing agent is 11 percent of the mass of the slagging constituent.
Example 2
The slagging and dephosphorizing agent for converter steelmaking comprises an oxidant, a slagging agent and a fluxing agent;
the oxidant is O2Spraying by using a spray gun;
the slag former is CaO and FeO;
the mass ratio of the CaO to the FeO is 7.5: 11;
the flux comprises the following chemical components in percentage by mass: f22.5 percent; 11.5 percent of Na; al32.5%; 1.38 percent of Ca; C. si, Mn, P and the like are less than 2 percent, and the balance is O element;
the melting point of the fluxing agent is 633 ℃, and the dosage of the fluxing agent is 12 percent of the mass of the slag former.
Example 3
The slagging and dephosphorizing agent for converter steelmaking comprises an oxidant, a slagging agent and a fluxing agent;
the oxidizing agent being O2Spraying by using a spray gun;
the slag former is CaO and FeO;
the mass ratio of the CaO to the FeO is 8: 11;
the flux comprises the following chemical components in percentage by mass: f22.5%; 11.5 percent of Na; al32.5%; 1.38 percent of Ca; C. si, Mn, P and the like are less than 2 percent, and the balance is O element;
the melting point of the fluxing agent is 633 ℃, and the dosage of the fluxing agent is 13 percent of the mass of the slag former.
Example 4
And putting the weighed steel sample and iron sample into a corundum crucible, then putting the corundum crucible into a graphite crucible, putting the graphite crucible into a high-temperature carbon tube furnace for heating, and continuously filling nitrogen into the furnace to protect the crucible. After the steel sample and the iron sample are completely melted, the components of the molten steel are tested by sampling, then the slagging and dephosphorizing agent prepared in the embodiment 1 is added according to the dephosphorizing process for dephosphorizing, and the components of the molten steel are tested continuously after the dephosphorization is finished.
Example 5
And putting the weighed steel sample and iron sample into a corundum crucible, then putting the corundum crucible into a graphite crucible, putting the graphite crucible into a high-temperature carbon tube furnace for heating, and continuously filling nitrogen into the furnace to protect the crucible. After the steel sample and the iron sample are completely melted, the components of the molten steel are tested by sampling, then the slagging and dephosphorizing agent prepared in the embodiment 2 is added according to the dephosphorizing process for dephosphorizing, and the components of the molten steel are tested continuously after the dephosphorization is finished.
Example 6
And putting the weighed steel sample and iron sample into a corundum crucible, then putting the corundum crucible into a graphite crucible, putting the graphite crucible into a high-temperature carbon tube furnace for heating, and continuously filling nitrogen into the furnace to protect the crucible. After the steel sample and the iron sample are completely melted, the components of the molten steel are tested by sampling, then the slagging and dephosphorizing agent prepared in the embodiment 3 is added according to the dephosphorizing process for dephosphorizing, and the components of the molten steel are tested continuously after the dephosphorization is finished.
Tests show that the average dephosphorization rate is 77.5%, the early-stage slagging time is 2.9min at least, 3.6min at most, and the average slagging time is 3.2 min.
In the description of the specification, reference to the description of "one embodiment," "an example," "a specific example" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is illustrative and explanatory only and is not intended to be exhaustive or to limit the invention to the precise embodiments described, and various modifications, additions, and substitutions may be made by those skilled in the art without departing from the scope of the invention or exceeding the scope of the claims.
Claims (6)
1. The slagging and dephosphorizing agent for converter steelmaking comprises an oxidant, a slagging agent and a fluxing agent, and is characterized in that:
the oxidant is O2Spraying by using a spray gun;
the slag former is CaO and FeO;
the flux comprises the following chemical components in percentage by mass: f22.5 percent; 11.5 percent of Na; 32.5 percent of Al; 1.38 percent of Ca; C. si, Mn and P are less than 2 percent.
2. The dephosphorization agent for slagging in steelmaking by means of a converter according to claim 1, wherein the melting point of the flux is 633 ℃.
3. The slagging and dephosphorizing agent for converter steelmaking according to claim 1, wherein the amount of fluxing agent is 11-13% by mass of slagging agent.
4. The slagging and dephosphorizing agent for converter steelmaking according to claim 1, characterized in that the amount by mass ratio of CaO and FeO in the slagging agent is 7-8: 11.
5. The dephosphorization process of the slagging dephosphorization agent for converter steelmaking according to claim 1, which is characterized by comprising the following steps:
first step, smeltingThe lance position is controlled at 1550mm in 1500-grade and the oxygen supply flow is controlled at 16500m in 15500-grade3H, oxygen supply treatment is carried out for 60-80 s;
and secondly, adding FeO and a fluxing agent in the slagging agent, processing for 15-20s, adjusting the lance position, raising the lance position by 150-200mm, adding CaO, and continuing processing for 90-120 s.
6. The dephosphorization process of the slagging dephosphorization agent for converter steelmaking according to claim 5, wherein the bottom blowing flow rate of oxygen is 380-420Nm3/h。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210330632.9A CN114657315A (en) | 2022-03-30 | 2022-03-30 | Slagging dephosphorization agent for converter steelmaking and dephosphorization process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210330632.9A CN114657315A (en) | 2022-03-30 | 2022-03-30 | Slagging dephosphorization agent for converter steelmaking and dephosphorization process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114657315A true CN114657315A (en) | 2022-06-24 |
Family
ID=82032944
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210330632.9A Pending CN114657315A (en) | 2022-03-30 | 2022-03-30 | Slagging dephosphorization agent for converter steelmaking and dephosphorization process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114657315A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101532071A (en) * | 2009-04-23 | 2009-09-16 | 重庆大学 | Converter dephosphorization complex slag former and slagging technology |
| CN101717842A (en) * | 2009-12-29 | 2010-06-02 | 江苏大学 | Method for dephosphorization and desulphurization in process of steel production in induction furnace |
| CN102242239A (en) * | 2011-07-28 | 2011-11-16 | 首钢总公司 | Molten iron pre-dephosphorization method by utilizing top and bottom combined blown converter |
| CN102787203A (en) * | 2012-08-08 | 2012-11-21 | 江苏大学 | Fluoride-free slag-making fluxing agent for converter steel making |
| JP2015042780A (en) * | 2013-07-25 | 2015-03-05 | Ｊｆｅスチール株式会社 | Dephosphorization treatment method for molten iron in converter |
-
2022
- 2022-03-30 CN CN202210330632.9A patent/CN114657315A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101532071A (en) * | 2009-04-23 | 2009-09-16 | 重庆大学 | Converter dephosphorization complex slag former and slagging technology |
| CN101717842A (en) * | 2009-12-29 | 2010-06-02 | 江苏大学 | Method for dephosphorization and desulphurization in process of steel production in induction furnace |
| CN102242239A (en) * | 2011-07-28 | 2011-11-16 | 首钢总公司 | Molten iron pre-dephosphorization method by utilizing top and bottom combined blown converter |
| CN102787203A (en) * | 2012-08-08 | 2012-11-21 | 江苏大学 | Fluoride-free slag-making fluxing agent for converter steel making |
| JP2015042780A (en) * | 2013-07-25 | 2015-03-05 | Ｊｆｅスチール株式会社 | Dephosphorization treatment method for molten iron in converter |
Non-Patent Citations (2)
| Title |
|---|
| 冯聚和, 冶金工业出版社 * |
| 章奉山: "不锈钢氧化脱磷实验研究", 《钢铁研究》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102312036B (en) | Steelmaking and slagging method | |
| WO2010074309A1 (en) | Method for reclaiming iron and phosphorus from steelmaking slag | |
| CN110205437B (en) | Method for reducing TFe content in semi-steel steelmaking converter final slag | |
| JP5338056B2 (en) | Stainless steel refining method | |
| CN107779550B (en) | The method of molten steel manganeisen additional amount is reduced in a kind of refining process | |
| CN101532071B (en) | Converter dephosphorization complex slag former and slagging technology | |
| CN1057134C (en) | Production method for medium- and low-carbon manganese iron | |
| US6732547B1 (en) | Method for the treating stainless steel refining slag | |
| CN114657315A (en) | Slagging dephosphorization agent for converter steelmaking and dephosphorization process | |
| JP6773131B2 (en) | Pretreatment method for hot metal and manufacturing method for ultra-low phosphorus steel | |
| JP2008196026A (en) | Method for preliminarily treating molten pig iron | |
| CN102776310B (en) | Pretreating dephosphorizing agent for molten iron containing metallic magnesium residues | |
| CN114774616A (en) | Method for reducing oxygen consumption by controlling lance position of oxygen lance of top-blown converter | |
| JP2653301B2 (en) | Reusing method of low P converter slag | |
| CN109136567A (en) | A kind of regeneration lead plaster recycles technique and device | |
| JP3645620B2 (en) | Hot metal pretreatment method | |
| CN109055661A (en) | A kind of production technology of low-phosphorous stainless steel | |
| CN115141905B (en) | Smelting method of high-scrap-ratio low-oxygen-level low-phosphorus IF steel converter | |
| CN103525979B (en) | Semisteel dephosphorizing agent, semisteel dephosphorizing method and steel smelting method thereof | |
| JPH07179920A (en) | Production of molten steel | |
| US20230304110A1 (en) | Method for producing chromium-containing molten steel | |
| CN113025773A (en) | Dephosphorization method for semisteel steelmaking | |
| JP2011058046A (en) | Method for dephosphorizing molten iron | |
| JP2007009237A (en) | Method for producing low phosphorus molten iron | |
| CN115652184A (en) | Method for smelting ultrapure ferrite stainless steel by using slag melting agent in AOD converter |
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 |
Application publication date: 20220624 |
|
| RJ01 | Rejection of invention patent application after publication |