CN114807493A - Operation method for prolonging service life of converter - Google Patents
Operation method for prolonging service life of converter Download PDFInfo
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- CN114807493A CN114807493A CN202210452618.6A CN202210452618A CN114807493A CN 114807493 A CN114807493 A CN 114807493A CN 202210452618 A CN202210452618 A CN 202210452618A CN 114807493 A CN114807493 A CN 114807493A
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- 238000000034 method Methods 0.000 title claims abstract description 20
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 50
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 49
- 239000010959 steel Substances 0.000 claims abstract description 49
- 238000003723 Smelting Methods 0.000 claims abstract description 25
- 229910052742 iron Inorganic materials 0.000 claims abstract description 25
- 238000007664 blowing Methods 0.000 claims abstract description 23
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 19
- 239000001301 oxygen Substances 0.000 claims abstract description 19
- 229910000514 dolomite Inorganic materials 0.000 claims abstract description 15
- 239000010459 dolomite Substances 0.000 claims abstract description 15
- 238000010079 rubber tapping Methods 0.000 claims abstract description 14
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 13
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 13
- 239000004571 lime Substances 0.000 claims abstract description 13
- 239000007788 liquid Substances 0.000 claims abstract description 9
- 230000008569 process Effects 0.000 claims abstract description 5
- 238000011017 operating method Methods 0.000 claims abstract 6
- 239000002893 slag Substances 0.000 claims description 50
- 229910052717 sulfur Inorganic materials 0.000 claims description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- 238000005070 sampling Methods 0.000 claims description 8
- 239000013589 supplement Substances 0.000 claims description 8
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 4
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 4
- 241001062472 Stokellia anisodon Species 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 4
- 238000005275 alloying Methods 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 4
- 230000007306 turnover Effects 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 13
- 238000012423 maintenance Methods 0.000 abstract description 9
- 238000009628 steelmaking Methods 0.000 abstract description 8
- 239000011819 refractory material Substances 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 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
-
- 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
- C21C5/32—Blowing from above
-
- 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
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention provides an operation method for prolonging the service life of a converter, and relates to the technical field of steel smelting. The operating method for improving the service life of the converter comprises the steps of determining the condition of molten iron entering the converter, measuring the original liquid level of the bottom of the converter, conveying the molten iron into the converter to serve as the original reference basis of the converter type, facilitating later-stage maintenance and control of the converter type, blowing the molten iron in the converter through an oxygen lance, and adding 20-25 kg/t of steel active lime and 15-20 kg/t of steel light-burned dolomite in the blowing process. By setting the conditions of molten iron entering the converter, designing the using state and using method of the oxygen lance and strictly controlling the tapping conditions of the molten steel, the furnace life of the converter of the steel plant is greatly improved, the furnace protection cost is greatly reduced, the production benefit is improved, on the other hand, the consumption of refractory materials used for furnace protection is greatly reduced, the refractory material cost is also controlled, and the production profit of the steelmaking process is invisibly improved.
Description
Technical Field
The invention relates to the technical field of steel smelting, in particular to an operation method for prolonging the service life of a converter.
Background
The converter age is one of important technical and economic indexes of steelmaking production, the converter age is improved, the maintenance of the converter type is an important task of the steelmaking production, the reasonable furnace type maintenance is closely related to the improvement of the productivity, the reduction of the refractory consumption, the realization of balanced and stable production and the like of a steel plant, and is an important index for measuring the production technical level of the steel plant, the red steel steelmaking age always goes beyond the average level of 8000 furnaces, the furnace age level is medium in the same type of converter age level in China, and adverse factors such as low converter operation rate, furnace machine mismatching and the like seriously restrict the steelmaking productivity and economic indexes due to the lower furnace age.
From the prior furnace service condition, the maintenance of the furnace body needs to be increased by means of patching and other measures when the furnace is in the middle and later periods of the service, the furnace is repaired at least once every day basically, and the normal smelting operation can be carried out only after about 2 hours of furnace repairing each time. The later period of the furnace service, the higher the maintenance cost of the furnace body needs to be invested, and on one hand, the time cost required by the maintenance of the furnace body is increased, so that the production efficiency is low, and the steelmaking capacity is influenced; on the other hand, the refractory input cost and the labor input cost required by furnace body maintenance are increased, so that the ton steel cost of a steel plant is increased, and the production profit of a steel-making process is invisibly compressed.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an operation method for improving the converter life, and solves the problems of low converter life and high furnace protection cost of a 50t converter in a red steel plant at present.
In order to achieve the purpose, the invention is realized by the following technical scheme: an operation method for improving the furnace life of a converter comprises the following steps:
s1, determining the condition of molten iron entering the furnace, measuring the height of the original furnace bottom liquid level, and then conveying the molten iron into the furnace;
s2, blowing molten iron in the furnace through an oxygen lance, adding 20-25 kg/t of steel active lime and 15-20 kg/t of steel light-burned dolomite in the blowing process, after blowing for 10-13 minutes by pure oxygen supply, starting to turn over the furnace, sampling and measuring temperature, pressing the lance at a low lance position for more than 30 seconds when the blowing is close to the end point, reducing TFe of final slag, and determining whether to supplement materials, supplement blowing or discharge molten steel according to the sampling and temperature measuring results;
s3, after tapping of molten steel is finished, adding 200-300 kg of light-burned dolomite into the furnace, then starting to put into a gun and using nitrogen to perform slag splashing operation, wherein the slag splashing time is more than 3 minutes;
after slag splashing in the steps S4 and S3 is finished, the smelting end point C is less than 0.05 percent, and the final slag in the furnace is poured out to prepare for the next smelting operation; and (4) keeping the final slag in the furnace when the smelting end point C is more than or equal to 0.05 percent, adopting the slag to smelt, filling molten iron and scrap steel, and starting the next furnace for smelting.
Preferably, the conditions of the molten iron charged in the step S1 are that C is more than or equal to 3.0 percent, Si is more than or equal to 20 percent and less than or equal to 80 percent, P is less than or equal to 0.150 percent and S is less than or equal to 0.060 percent.
Preferably, the total charge amount in the furnace in the step S1 is in the range of 60 to 62 tons.
Preferably, in the step S2, the distance between the oxygen lance and the liquid level of the molten pool is controlled within the range of 0.8-1.0M, the oxygen pressure is controlled within the range of 0.75-1.0MPa, and the oxygen flow rate is controlled within 10000-12000M 3 /h。
Preferably, CaO in the active lime is more than or equal to 88 percent, and SiO in the active lime 2 Less than or equal to 2.50 percent and less than or equal to 0.08 percent of S; the light-burned dolomite contains MgO more than or equal to 29.00% and SiO 2 ≤2.50%、S≤0.06%。
Preferably, in the step S3, the smelting end point C is controlled according to the target that C is more than or equal to 0.07%; and in the step S2, the final slag TFe is controlled according to the target that the TFe is less than or equal to 18 percent.
Preferably, the ladle wall is baked to be above 900 ℃ before tapping of the molten steel, the alloy used for deoxidation alloying is baked to be about 500-600 ℃, and the tapping temperature of the molten steel is controlled to be in the range of 1645-1660 ℃.
The invention has the following beneficial effects:
according to the operation method for improving the furnace life of the converter, provided by the invention, the furnace life of the converter in a steel plant is greatly improved, the furnace protection cost is greatly reduced, the production benefit is improved, on the other hand, the consumption of refractory materials used for furnace protection is greatly reduced, the refractory material cost is also controlled, and the production benefit of a steel-making process is invisibly improved by setting the conditions of molten iron entering the converter, designing the using state and using method of an oxygen lance and strictly controlling the tapping conditions of the molten steel.
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 embodiment of the invention provides an operation method for improving the service life of a converter, which comprises the following steps:
s1, determining the condition of molten iron entering the furnace, measuring the liquid level of the original furnace bottom, and then conveying the molten iron into the furnace to serve as the original reference basis of the furnace type, thereby facilitating the maintenance and control of the furnace type in the later period;
s2, blowing molten iron in the furnace through an oxygen lance, adding 20-25 kg/t of steel active lime and 15-20 kg/t of steel light-burned dolomite in the blowing process, after pure oxygen supply blowing for 10-13 minutes, starting to turn over the furnace, sampling and measuring temperature, pressing the lance at a low lance position for more than 30 seconds when the blowing is close to the end point, reducing TFe of final slag, and determining whether to supplement, supplement blowing or discharge molten steel according to the sampling and temperature measuring result;
s3, after tapping of molten steel, adding 200-300 kg of light-burned dolomite into the furnace, and then starting to discharge a gun to carry out slag splashing operation by using nitrogen, wherein the slag splashing time is more than 3 minutes;
after slag splashing in the steps S4 and S3 is finished, the smelting end point C is less than 0.05 percent, and the final slag in the furnace is poured out to prepare for the next smelting operation; and (4) keeping the final slag in the furnace when the smelting end point C is more than or equal to 0.05 percent, adopting the slag to smelt, filling molten iron and scrap steel, and starting the next furnace for smelting.
The conditions of the molten iron charged into the furnace in the step S1 are that C is more than or equal to 3.0%, Si is more than or equal to 20% and less than or equal to 80%, P is less than or equal to 0.150%, and S is less than or equal to 0.060%.
The total charge amount in the furnace in the step S1 is in the range of 60 to 62 tons, ensuring a stable charge amount.
In the step S2, the distance between the oxygen lance and the liquid level of the molten pool is controlled within the range of 0.8-1.0M, the oxygen pressure is controlled within the range of 0.75-1.0MPa, and the oxygen flow is controlled within 10000-12000M 3 /h。
In the step S2, CaO in the active lime is more than or equal to 88 percent and SiO in the active lime 2 Less than or equal to 2.50 percent and less than or equal to 0.08 percent of S; MgO in light-burned dolomite is more than or equal to 29.00 percent and SiO 2 ≤2.50%、S≤0.06%。
In the step S3, the smelting end point C is controlled according to the target that C is more than or equal to 0.07 percent; in the step S2, the TFe of the final slag is controlled according to the target that the TFe is less than or equal to 18 percent, the R of the final slag is controlled according to the target of 3 to 3.5, and the MgO of the final slag is controlled according to the target of 8 to 12.
Baking the ladle wall to above 900 ℃ before tapping the molten steel, baking the alloy used for deoxidation alloying to about 500-1660 ℃, and controlling the tapping temperature of the molten steel within the range of 1645-1660 ℃.
In production, furnace bottom measurement and manual furnace lining observation are adopted as furnace type monitoring means, furnace bottom measurement must be carried out after each shift, furnace lining condition is observed after the slag splashing of each furnace steel is finished, smelting operation is properly adjusted according to the furnace bottom condition, the slag forming amount is properly reduced when the furnace bottom rises, thick slag and slag remaining operation is not carried out, the slag forming amount is properly increased when the furnace bottom descends, and proper amount of light-burned dolomite is added for thick slag and slag remaining operation and the like.
Example 2
The embodiment of the invention provides an operation method for improving the service life of a converter, which comprises the following steps:
s1, determining the condition of molten iron entering the furnace, measuring the liquid level of the original furnace bottom, and then conveying the molten iron into the furnace to serve as the original reference basis of the furnace type, thereby facilitating the maintenance and control of the furnace type in the later period;
s2, blowing molten iron in the furnace through an oxygen lance, adding 20-25 kg/t of steel active lime and 15-20 kg/t of steel light-burned dolomite in the blowing process, after blowing for 10-13 minutes by pure oxygen supply, starting to turn over the furnace, sampling and measuring temperature, pressing the lance at a low lance position for more than 30 seconds when the blowing is close to the end point, reducing TFe of final slag, and determining whether to supplement materials, supplement blowing or discharge molten steel according to the sampling and temperature measuring results;
s3, after tapping of molten steel is finished, adding 200-300 kg of light-burned dolomite into the furnace, then starting to put into a gun and using nitrogen to perform slag splashing operation, wherein the slag splashing time is more than 3 minutes;
after slag splashing in the steps S4 and S3 is finished, the smelting end point C is less than 0.05 percent, and the final slag in the furnace is poured out to prepare for the next smelting operation; and (4) keeping the final slag in the furnace when the smelting end point C is more than or equal to 0.05 percent, adopting the slag to smelt, filling molten iron and scrap steel, and starting the next furnace for smelting.
The conditions of the molten iron charged into the furnace in the step S1 are that C is more than or equal to 3.0%, Si is more than or equal to 20% and less than or equal to 80%, P is less than or equal to 0.150%, and S is less than or equal to 0.060%.
The total charge amount in the furnace in the step S1 is in the range of 60 to 62 tons, ensuring a stable charge amount.
In the step S2, the distance between the oxygen lance and the liquid level of the molten pool is controlled within the range of 0.8-1.0M, the oxygen pressure is controlled within the range of 0.75-1.0MPa, and the oxygen flow is controlled within 10000-12000M 3 /h。
In the step S2, CaO in the active lime is more than or equal to 88 percent and SiO in the active lime 2 Less than or equal to 2.50 percent and less than or equal to 0.08 percent of S; MgO in light-burned dolomite is more than or equal to 29.00 percent and SiO 2 ≤2.50%、S≤0.06%。
In the step S3, the smelting end point C is controlled according to the target that C is more than or equal to 0.07 percent; in the step S2, the TFe of the final slag is controlled according to the target that the TFe is less than or equal to 18 percent, the R of the final slag is controlled according to the target of 3 to 3.5, and the MgO of the final slag is controlled according to the target of 8 to 12.
Baking the ladle wall to above 900 ℃ before tapping the molten steel, baking the alloy used for deoxidation alloying to about 500-1660 ℃, and controlling the tapping temperature of the molten steel within the range of 1645-1660 ℃.
In production, furnace bottom measurement and manual furnace lining observation are adopted as furnace type monitoring means, furnace bottom measurement must be carried out after each shift, furnace lining condition is observed after the slag splashing of each furnace steel is finished, smelting operation is properly adjusted according to the furnace bottom condition, the slag forming amount is properly reduced when the furnace bottom rises, thick slag and slag remaining operation is not carried out, the slag forming amount is properly increased when the furnace bottom descends, and proper amount of light-burned dolomite is added for thick slag and slag remaining operation and the like.
Blowing a converter A of a steel plant from a new converter of 5 and 6 days in 2019 to a converter stoking and overhauling of 8 and 2 days in 2021, wherein the furnace life reaches 31594; the method is characterized in that a new converter of a converter 9 No. 9 of a steel plant is blown in by 8-29 days in 2019 to be stoked and overhauled by 3-5 days in 2021, the furnace life reaches 20228, the furnace life of the converter of the steel plant is greatly improved, the furnace life of two converters is doubled compared with that of the previous converter, the furnace life creates a historical new height since the steel plant is built, the furnace protection cost of 2 converters of the steel plant is greatly reduced after the furnace life is improved, on one hand, the furnace protection time cost is reduced, the overall furnace protection times are greatly reduced while the furnace life is continuously improved due to the development of furnace type dynamic management, the furnace protection time is reduced, and the production benefit is improved; on one hand, the consumption of the refractory materials used for furnace protection is greatly reduced, the cost of the refractory materials is controlled, the average comprehensive cost of one converter is 250 ten thousand yuan, the furnace life of 2 converters is doubled, and the cost of 2 times of converter dumping is saved by about 500 ten thousand yuan.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. An operation method for improving the service life of a converter is characterized by comprising the following steps: the method comprises the following steps:
s1, determining the condition of molten iron entering the furnace, measuring the height of the original furnace bottom liquid level, and then conveying the molten iron into the furnace;
s2, blowing molten iron in the furnace through an oxygen lance, adding 20-25 kg/t of steel active lime and 15-20 kg/t of steel light-burned dolomite in the blowing process, after blowing for 10-13 minutes by pure oxygen supply, starting to turn over the furnace, sampling and measuring temperature, pressing the lance at a low lance position for more than 30 seconds when the blowing is close to the end point, reducing TFe of final slag, and determining whether to supplement materials, supplement blowing or discharge molten steel according to the sampling and temperature measuring results;
s3, after tapping of molten steel is finished, adding 200-300 kg of light-burned dolomite into the furnace, then starting to put into a gun and using nitrogen to perform slag splashing operation, wherein the slag splashing time is more than 3 minutes;
after slag splashing in the steps S4 and S3 is finished, the smelting end point C is less than 0.05 percent, and the final slag in the furnace is poured out to prepare for the next smelting operation; and (4) keeping the final slag in the furnace when the smelting end point C is more than or equal to 0.05 percent, adopting the slag to smelt, filling molten iron and scrap steel, and starting the next furnace for smelting.
2. The operating method for improving the campaign length of a converter according to claim 1, wherein: the conditions of molten iron charged into the furnace in the step S1 are that C is more than or equal to 3.0 percent, Si is more than or equal to 20 percent and less than or equal to 80 percent, P is less than or equal to 0.150 percent, and S is less than or equal to 0.060 percent.
3. The operating method for improving the campaign length of a converter according to claim 1, wherein: the total charge in the furnace in said step S1 is in the range of 60 to 62 tons.
4. The method for operating a converter with an increased campaign length of a converter according to claim 1, wherein: in the step S2, the distance between the oxygen lance and the liquid level of the molten pool is controlled within the range of 0.8-1.0M, the oxygen pressure is controlled within the range of 0.75-1.0MPa, and the oxygen flow is controlled within 10000- 3 /h。
5. The operating method for improving the campaign length of a converter according to claim 1, wherein: in the step S2, CaO in the active lime is more than or equal to 88 percent, and SiO in the active lime 2 Less than or equal to 2.50 percent and less than or equal to 0.08 percent of S; the light-burned dolomite contains MgO more than or equal to 29.00% and SiO 2 ≤2.50%、S≤0.06%。
6. The operating method for improving the campaign length of a converter according to claim 1, wherein: in the step S3, the smelting end point C is controlled according to the target that C is more than or equal to 0.07 percent; and in the step S2, the final slag TFe is controlled according to the target that the TFe is less than or equal to 18 percent.
7. The operating method for improving the campaign length of a converter according to claim 1, wherein: the ladle wall is baked to over 900 ℃ before tapping of the molten steel, the alloy used for deoxidation alloying is baked to about 500-600 ℃, and the tapping temperature of the molten steel is controlled within the range of 1645-1660 ℃.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210452618.6A CN114807493B (en) | 2022-04-27 | 2022-04-27 | Operation method for improving converter life |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210452618.6A CN114807493B (en) | 2022-04-27 | 2022-04-27 | Operation method for improving converter life |
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| CN114807493A true CN114807493A (en) | 2022-07-29 |
| CN114807493B CN114807493B (en) | 2024-02-20 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102424886A (en) * | 2011-12-31 | 2012-04-25 | 钢铁研究总院 | Furnace protection process for decarburization converter less slag splashing |
| CN104073589A (en) * | 2014-07-16 | 2014-10-01 | 攀钢集团攀枝花钢钒有限公司 | Method for maintaining furnace bottom of semisteel steelmaking combined blown converter |
| CN108251590A (en) * | 2018-03-14 | 2018-07-06 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of method for improving converter lining life |
| CN109666775A (en) * | 2018-11-16 | 2019-04-23 | 九江萍钢钢铁有限公司 | A kind of blast furnace labour quick smelting process of converter |
| CN110373511A (en) * | 2019-07-17 | 2019-10-25 | 邯郸钢铁集团有限责任公司 | A kind of converter smelting process of low lime consumption |
| 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 |
-
2022
- 2022-04-27 CN CN202210452618.6A patent/CN114807493B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102424886A (en) * | 2011-12-31 | 2012-04-25 | 钢铁研究总院 | Furnace protection process for decarburization converter less slag splashing |
| CN104073589A (en) * | 2014-07-16 | 2014-10-01 | 攀钢集团攀枝花钢钒有限公司 | Method for maintaining furnace bottom of semisteel steelmaking combined blown converter |
| CN108251590A (en) * | 2018-03-14 | 2018-07-06 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of method for improving converter lining life |
| CN109666775A (en) * | 2018-11-16 | 2019-04-23 | 九江萍钢钢铁有限公司 | A kind of blast furnace labour quick smelting process of converter |
| CN110373511A (en) * | 2019-07-17 | 2019-10-25 | 邯郸钢铁集团有限责任公司 | A kind of converter smelting process of low lime consumption |
| 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 |
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| Publication number | Publication date |
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| CN114807493B (en) | 2024-02-20 |
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