CN114807493B - Operation method for improving converter life - Google Patents
Operation method for improving converter life Download PDFInfo
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- CN114807493B CN114807493B CN202210452618.6A CN202210452618A CN114807493B CN 114807493 B CN114807493 B CN 114807493B CN 202210452618 A CN202210452618 A CN 202210452618A CN 114807493 B CN114807493 B CN 114807493B
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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 56
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 48
- 239000010959 steel Substances 0.000 claims abstract description 48
- 238000003723 Smelting Methods 0.000 claims abstract description 28
- 229910052742 iron Inorganic materials 0.000 claims abstract description 28
- 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
- 238000007664 blowing Methods 0.000 claims abstract description 18
- 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 9
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 9
- 239000004571 lime Substances 0.000 claims abstract description 9
- 239000007788 liquid Substances 0.000 claims abstract description 9
- 230000008569 process Effects 0.000 claims abstract description 5
- 239000002893 slag Substances 0.000 claims description 48
- 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
- 229910052717 sulfur Inorganic materials 0.000 claims description 8
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 7
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 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
- 238000013459 approach Methods 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 229910052698 phosphorus Inorganic materials 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 13
- 238000012423 maintenance Methods 0.000 abstract description 9
- 238000009628 steelmaking Methods 0.000 abstract description 9
- 239000011819 refractory material Substances 0.000 abstract description 8
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000013461 design Methods 0.000 abstract description 2
- 230000001276 controlling effect Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000011017 operating method Methods 0.000 description 2
- 230000001105 regulatory effect Effects 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
- 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 improving the service life of a converter, and relates to the technical field of steel smelting. The 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, and taking the molten iron as an original reference basis of the furnace type, so that the later-stage furnace type maintenance and control are facilitated, the molten iron in the converter is blown through an oxygen lance, and 20-25 kg/t of active lime of steel and 15-20 kg/t of light burned dolomite of steel are added in the blowing process. Through setting the molten iron condition, the using state of the oxygen lance, the design of the using method and the strict control of the molten steel tapping condition, the furnace age of the converter in the steel mill is greatly improved, the furnace protection cost is greatly reduced, the production benefit is improved, the consumption of refractory materials used for protecting the furnace is greatly reduced, the refractory material cost is also controlled, and the production profit of the steelmaking process is intangibly improved.
Description
Technical Field
The invention relates to the technical field of steel smelting, in particular to an operating method for improving 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 steelmaking production, reasonable furnace type maintenance is closely related to improvement of productivity, reduction of refractory material consumption, realization of balanced and stable production and the like of a steel plant, the converter age is an important index for measuring the production technical level of the steel plant, the red steel steelmaking furnace age is always loitered at the average level of 8000 furnaces, the converter age level is medium in the national converter age level of the same type, and adverse factors such as low converter operation rate, mismatching of a furnace machine and the like seriously restrict the steelmaking productivity and economic indexes due to low converter age.
From the prior furnace service condition, when the middle and later stages of the furnace service are seen, maintenance of the furnace body is increased by means of repairing and the like, and the furnace is basically repaired at least once every day, and normal smelting operation can be carried out only after at least about 2 hours for each furnace repairing. The higher the furnace body maintenance cost required to be input is, the time cost required for furnace body maintenance is increased, the production efficiency is low, and the steelmaking productivity is affected; on the other hand, the investment cost of refractory materials and the labor investment cost required by furnace body maintenance are increased, so that the ton steel cost of a steel mill is increased, and the production profit of a steelmaking process is intangibly compressed.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a method for improving the operation of the converter age, which solves the problems of low converter age and high furnace protection cost of the current 50t converter in a red steel mill.
In order to achieve the above purpose, the invention is realized by the following technical scheme: a method of operating a converter for increasing the campaign of the converter, comprising the steps of:
s1, determining the condition of molten iron entering a furnace, measuring the liquid level of the original furnace bottom, 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 active lime of steel and 15-20 kg/t of light burned dolomite of steel in the blowing process, blowing for 10-13 minutes by pure oxygen supply, starting to pour the furnace, sampling and measuring temperature, pressing the lance for more than 30 seconds at a low lance position when the blowing approaches the end point, reducing final slag TFe, and determining whether to feed, blow or discharge molten steel according to the sampling and measuring temperature result;
s3, adding 200-300 kg of light burned dolomite into the furnace after tapping of molten steel is finished, and then starting to discharge a gun to perform slag splashing operation by using nitrogen, wherein the slag splashing time is more than 3 minutes;
s4, after the slag splashing in the step S3 is finished, the smelting end point C is less than 0.05%, the final slag in the furnace is completely poured out, and the next furnace smelting operation is prepared; the smelting end point C is more than or equal to 0.05%, the final slag in the furnace is left, the full slag is adopted for smelting, molten iron and scrap steel are filled, and the next furnace smelting is started.
Preferably, the conditions of the molten iron charged into the furnace in the step S1 are 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%.
Preferably, the total loading in the furnace in step S1 is in the range of 60-62 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 is controlled within the range of 10000-12000M 3 /h。
Preferably, caO in the active lime is more than or equal to 88 percent and SiO 2 Less than or equal to 2.50 percent and S less than or equal to 0.08 percent; mgO in the light burned dolomite is more than or equal to 29.00 percent and SiO 2 ≤2.50%、S≤0.06%。
Preferably, in the step S3, the smelting endpoint C is controlled according to the target that C is greater than or equal to 0.07%; in the step S2, the final slag TFe is controlled according to the target that TFe is less than or equal to 18 percent.
Preferably, the ladle Bao Bi is baked to more than 900 ℃ before tapping the molten steel, the alloy used for deoxidizing and alloying is baked to about 500-600 ℃, and the tapping temperature of the molten steel is controlled within the range of 1645-1660 ℃.
The invention has the following beneficial effects:
according to the operating method for improving the furnace life of the converter, the setting of the molten iron condition of the converter, the use state of the oxygen lance, the design of the using method and the strict control of the molten steel tapping condition are adopted, so that 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, the consumption of refractory materials used for protecting the furnace is greatly reduced, the refractory material cost is also controlled, and the production profit of a steelmaking process is intangibly improved.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the 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 a furnace, measuring the height of the liquid level of the original furnace bottom, and then conveying the molten iron into the furnace as an original reference basis of the furnace type, so that the maintenance and control of the furnace type in the later stage are facilitated;
s2, blowing molten iron in the furnace through an oxygen lance, adding 20-25 kg/t of active lime of steel and 15-20 kg/t of light burned dolomite of steel in the blowing process, blowing for 10-13 minutes by pure oxygen supply, starting to pour the furnace, sampling and measuring temperature, pressing the lance for more than 30 seconds at a low lance position when the blowing approaches the end point, reducing final slag TFe, and determining whether to feed, blow or discharge molten steel according to the sampling and measuring temperature result;
s3, adding 200-300 kg of light burned dolomite into the furnace after tapping of molten steel is finished, and then starting to discharge a gun to perform slag splashing operation by using nitrogen, wherein the slag splashing time is more than 3 minutes;
s4, after the slag splashing in the step S3 is finished, the smelting end point C is less than 0.05%, the final slag in the furnace is completely poured out, and the next furnace smelting operation is prepared; the smelting end point C is more than or equal to 0.05%, the final slag in the furnace is left, the full slag is adopted for smelting, molten iron and scrap steel are filled, and the next furnace smelting is started.
The conditions of the molten iron in the step S1 are C more than or equal to 3.0%, si more than or equal to 20% and less than or equal to 80%, P less than or equal to 0.150% and S less than or equal to 0.060, and the formation of slag can be effectively reduced by accurately controlling the conditions of the molten iron in the step S1.
And S1, the total loading amount in the furnace in the step of S1 is in the range of 60-62 tons, and the loading amount is ensured to be stable.
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 the range of 10000-12000M 3 /h。
In the S2 step, caO in the active lime is more than or equal to 88 percent and SiO 2 Less than or equal to 2.50 percent and S less than or equal to 0.08 percent; mgO in the light burned dolomite is more than or equal to 29.00%、SiO 2 ≤2.50%、S≤0.06%。
In the step S3, controlling a smelting end point C according to the target that C is more than or equal to 0.07%; in the step S2, final slag TFe is controlled according to a target of TFe less than or equal to 18 percent, final slag R is controlled according to a target of 3 to 3.5, and final slag MgO is controlled according to a target of 8 to 12.
The ladle Bao Bi is baked to more than 900 ℃ before tapping the molten steel, the alloy used for deoxidizing and alloying is baked to about 500-600 ℃, and the tapping temperature of the molten steel is controlled in the range of 1645-1660 ℃.
In the production, the furnace bottom measurement and the artificial furnace lining observation are adopted as the furnace type monitoring means, the furnace bottom measurement is needed after each shift, the furnace lining condition is observed after each steel slag splashing of the furnace is finished, the smelting operation is properly regulated according to the furnace bottom condition, the slag making amount is properly reduced when the furnace bottom rises, the slag making operation is not carried out, the slag making amount is properly increased when the furnace bottom falls, and a proper amount of light burned dolomite is added for carrying out the operations such as slag making 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 a furnace, measuring the height of the liquid level of the original furnace bottom, and then conveying the molten iron into the furnace as an original reference basis of the furnace type, so that the maintenance and control of the furnace type in the later stage are facilitated;
s2, blowing molten iron in the furnace through an oxygen lance, adding 20-25 kg/t of active lime of steel and 15-20 kg/t of light burned dolomite of steel in the blowing process, blowing for 10-13 minutes by pure oxygen supply, starting to pour the furnace, sampling and measuring temperature, pressing the lance for more than 30 seconds at a low lance position when the blowing approaches the end point, reducing final slag TFe, and determining whether to feed, blow or discharge molten steel according to the sampling and measuring temperature result;
s3, adding 200-300 kg of light burned dolomite into the furnace after tapping of molten steel is finished, and then starting to discharge a gun to perform slag splashing operation by using nitrogen, wherein the slag splashing time is more than 3 minutes;
s4, after the slag splashing in the step S3 is finished, the smelting end point C is less than 0.05%, the final slag in the furnace is completely poured out, and the next furnace smelting operation is prepared; the smelting end point C is more than or equal to 0.05%, the final slag in the furnace is left, the full slag is adopted for smelting, molten iron and scrap steel are filled, and the next furnace smelting is started.
The conditions of the molten iron in the step S1 are C more than or equal to 3.0%, si more than or equal to 20% and less than or equal to 80%, P less than or equal to 0.150% and S less than or equal to 0.060, and the formation of slag can be effectively reduced by accurately controlling the conditions of the molten iron in the step S1.
And S1, the total loading amount in the furnace in the step of S1 is in the range of 60-62 tons, and the loading amount is ensured to be stable.
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 the range of 10000-12000M 3 /h。
In the S2 step, caO in the active lime is more than or equal to 88 percent and SiO 2 Less than or equal to 2.50 percent and S less than or equal to 0.08 percent; mgO in the light burned dolomite is more than or equal to 29.00 percent, siO 2 ≤2.50%、S≤0.06%。
In the step S3, controlling a smelting end point C according to the target that C is more than or equal to 0.07%; in the step S2, final slag TFe is controlled according to a target of TFe less than or equal to 18 percent, final slag R is controlled according to a target of 3 to 3.5, and final slag MgO is controlled according to a target of 8 to 12.
The ladle Bao Bi is baked to more than 900 ℃ before tapping the molten steel, the alloy used for deoxidizing and alloying is baked to about 500-600 ℃, and the tapping temperature of the molten steel is controlled in the range of 1645-1660 ℃.
In the production, the furnace bottom measurement and the artificial furnace lining observation are adopted as the furnace type monitoring means, the furnace bottom measurement is needed after each shift, the furnace lining condition is observed after each steel slag splashing of the furnace is finished, the smelting operation is properly regulated according to the furnace bottom condition, the slag making amount is properly reduced when the furnace bottom rises, the slag making operation is not carried out, the slag making amount is properly increased when the furnace bottom falls, and a proper amount of light burned dolomite is added for carrying out the operations such as slag making and the like.
Blowing a new converter of a steel mill A from a new converter of 5 th month 6 th year of 2019 to a tamping furnace of 8 th month 2 nd year of 2021 for overhauling, wherein the furnace age reaches 31594 furnaces; the new furnace of the steel mill No. 9 converter 2019 is blown to 2021 for 3 months and 5 days for tamping and overhauling, the furnace age reaches 20228, the furnace ages of the steel mill converters are greatly improved, the two converters are doubled compared with the prior art, the history of steel making and factory building is created by the furnace ages, the furnace protection cost of 2 converters of the steel mill is greatly reduced after the furnace ages are improved, on one hand, the furnace protection time cost is further reduced, the total furnace protection times are greatly reduced while the furnace ages are continuously improved, the furnace protection time is reduced, and the production benefit is improved; on one hand, the consumption of the refractory materials used for protecting the furnace is greatly reduced, the cost of the refractory materials is controlled, the average comprehensive cost of a converter is 250 ten thousand yuan according to the prior art, the furnace age of 2 converters is doubled, and the cost of pouring the furnace for 2 times is saved by about 500 ten thousand yuan.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. A method for improving the service life of a converter, which is characterized in that: the method comprises the following steps:
s1, determining the condition of molten iron entering a furnace, measuring the liquid level of the original furnace bottom, 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 active lime of steel and 15-20 kg/t of light burned dolomite of steel in the blowing process, blowing for 10-13 minutes by pure oxygen supply, starting to pour the furnace, sampling and measuring temperature, pressing the lance for more than 30 seconds at a low lance position when the blowing approaches the end point, reducing final slag TFe, and determining whether to feed, blow or discharge molten steel according to the sampling and measuring temperature result;
s3, adding 200-300 kg of light burned dolomite into the furnace after tapping of molten steel is finished, and then starting to discharge a gun to perform slag splashing operation by using nitrogen, wherein the slag splashing time is more than 3 minutes;
s4, after the slag splashing in the step S3 is finished, the smelting end point C is less than 0.05%, the final slag in the furnace is completely poured out, and the next furnace smelting operation is prepared; the smelting end point C is more than or equal to 0.05%, the final slag in the furnace is left, the full slag is adopted for smelting, molten iron and scrap steel are filled, and the next furnace smelting is started;
the conditions of molten iron 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 step S2In the step, the distance between the oxygen lance and the liquid level of a 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 the range of 10000-12000M 3 /h；
The ladle Bao Bi is baked to more than 900 ℃ before tapping the molten steel, the alloy used for deoxidizing and alloying is baked to 500-600 ℃, and the tapping temperature of the molten steel is controlled within the range of 1645-1660 ℃.
2. A method of operating a converter for increasing the campaign of a converter as set forth in claim 1, wherein: the total loading amount in the furnace in the step S1 is in the range of 60-62 tons.
3. A method of operating a converter for increasing the campaign of a converter as set forth in claim 1, wherein: in the step S2, caO in the active lime is more than or equal to 88 percent, and SiO 2 Less than or equal to 2.50 percent and S less than or equal to 0.08 percent; mgO in the light burned dolomite is more than or equal to 29.00 percent and SiO 2 ≤2.50%、S≤0.06%。
4. A method of operating a converter for increasing the campaign of a converter as set forth in claim 1, wherein: in the step S2, the final slag TFe is controlled according to the target that TFe is less than or equal to 18 percent.
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|---|---|---|---|
| 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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| CN114807493B true CN114807493B (en) | 2024-02-20 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
|---|---|
| CN114807493A (en) | 2022-07-29 |
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