CN115747405B - Method for manufacturing early-stage slag according to CO value - Google Patents
Method for manufacturing early-stage slag according to CO value Download PDFInfo
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- CN115747405B CN115747405B CN202211454185.4A CN202211454185A CN115747405B CN 115747405 B CN115747405 B CN 115747405B CN 202211454185 A CN202211454185 A CN 202211454185A CN 115747405 B CN115747405 B CN 115747405B
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- 239000002893 slag Substances 0.000 title claims abstract description 123
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 60
- 238000007664 blowing Methods 0.000 claims abstract description 40
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000001301 oxygen Substances 0.000 claims abstract description 30
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 30
- 229910052742 iron Inorganic materials 0.000 claims abstract description 28
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 24
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 24
- 239000011574 phosphorus Substances 0.000 claims abstract description 24
- 238000005070 sampling Methods 0.000 claims abstract description 20
- 239000002184 metal Substances 0.000 claims abstract description 18
- 229910052751 metal Inorganic materials 0.000 claims abstract description 18
- 238000006243 chemical reaction Methods 0.000 claims abstract description 12
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 10
- 230000000630 rising effect Effects 0.000 claims abstract description 10
- 239000010959 steel Substances 0.000 claims abstract description 10
- 230000008859 change Effects 0.000 claims abstract description 8
- 239000011324 bead Substances 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims abstract description 6
- 230000002035 prolonged effect Effects 0.000 claims abstract description 5
- 150000002739 metals Chemical class 0.000 claims abstract description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 21
- 238000012544 monitoring process Methods 0.000 claims description 9
- 229910052757 nitrogen Inorganic materials 0.000 claims description 9
- 238000005187 foaming Methods 0.000 claims description 7
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 6
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 6
- 239000004571 lime Substances 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 6
- 238000010009 beating Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 3
- CSJDCSCTVDEHRN-UHFFFAOYSA-N methane;molecular oxygen Chemical compound C.O=O CSJDCSCTVDEHRN-UHFFFAOYSA-N 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 3
- 239000000126 substance Substances 0.000 abstract description 3
- 238000003723 Smelting Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012840 feeding operation Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention discloses a method for manufacturing early-stage slag according to a CO value, which comprises the following steps: sampling the molten bath metal: sampling molten pool metals with different oxygen blowing times, and step two: analyzing the content of metal-like phosphorus elements in a molten pool: detecting the content of phosphorus element in a molten pool metal sample, analyzing proper oxygen blowing time and slag pouring time, and step three: setting an initial position of a gun position and a control method for stable rising of a CO value, and step four: setting and adjusting the gun position height: and (3) formulating a reasonable gun position height adjustment rule according to the change of the CO numerical curve. The method for manufacturing the early-stage slag according to the CO value; according to the trend change of the CO value, the gun position and the feeding are adjusted, the proper deslagging time is controlled to realize the maximum removal of phosphorus and harmful substances, the oxygen blowing time is properly prolonged, the Fe element is reduced by utilizing the C-O reaction, the FeO content of the earlier-stage slag is reduced, iron beads are reduced to the maximum extent, the iron loss is reduced, and the consumption of steel materials is reduced.
Description
Technical Field
The invention relates to the technical field of converter smelting processes, in particular to a method for manufacturing early-stage slag according to a CO value.
Background
In the converter smelting process, the slag making system is a measure for determining a proper slag making method, the type of slag, the adding quantity and time of the slag and accelerating slag formation, and can be generally divided into: the single slag operation, the double slag operation and the slag retaining operation can be adopted when silicon and phosphorus elements in molten iron are higher or high-quality steel is blown, and the double slag operation can be adopted when high-silicon molten iron is smelted, and the double slag operation is adopted when the control of the prior stage of blowing can effectively remove the phosphorus elements and harmful substances in the steel, thereby being greatly beneficial to the follow-up blowing control;
however, the existing method for manufacturing the early slag according to the CO value has certain problems.
The existing double slag operation means that 1/2 slag charge is added in 2-3 batches after the ignition is performed by blowing, gun lifting and slag pouring are adopted according to the flame and slag melting conditions of a furnace mouth, 1/2 to 2/3 slag is poured, then slag charge is added again for slag making, feO in the early-stage slag is about 20% and iron beads are about 9%, and iron loss is large;
the existing double slag operation mainly judges the slag lifting condition according to the fire flame and the jet matters of a furnace mouth through manual experience, the early-stage effective dephosphorization temperature interval is (1400 ℃ -1500 ℃), the early-stage slag oxygen blowing time is too short, the temperature is too low, the early-stage slag cannot be effectively formed, the dephosphorization efficiency is low, the slag rephosphorization is caused by too high blowing time, the dephosphorization rate is reduced, the proper slag pouring time cannot be prepared and judged by manual judgment and slag pouring, and the early-stage slag effect is easy to be poor.
Therefore, a method of manufacturing early slag according to the CO value is required to solve the above problems.
Disclosure of Invention
The invention aims to provide a method for manufacturing early-stage slag according to a CO value, which aims to solve the problems that the prior method for manufacturing early-stage slag is large in overall iron loss, cannot reasonably judge specific slag pouring time and is easy to cause poor early-stage slag effect in the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions: a method for making early slag according to the value of CO, comprising the steps of:
step one: sampling the molten bath metal: sampling molten pool metals with different oxygen blowing times;
step two: analyzing the content of metal-like phosphorus elements in a molten pool: detecting the content of phosphorus element in a molten pool metal sample and analyzing proper oxygen blowing time and slag pouring time;
step three: setting an initial position of a gun position and a control method for stably rising a CO value;
step four: setting and adjusting the gun position height: a reasonable gun position height adjustment rule is formulated according to the change of the CO numerical curve;
step five: the iron loss of slag is reduced by converting nitrogen, the nitrogen is converted at the furnace mouth of the gun lifting position, and the effect of separating iron slag is achieved by beating slag.
Preferably, the first specific step is as follows:
the special molten metal sampling tool is adopted to sample molten pool metal at the temperature of about 1420 ℃ in the time of 4'30 ' to 5'30 ' and the time of about 8' of oxygen blowing time respectively.
Preferably, the second specific step is as follows;
detecting the metal-like element of the molten pool in the first step, and sampling and analyzing to obtain that the dephosphorization rate of the metal-like element of the molten pool reaches 60% in the period from 4'30 ' to 5'30 ', wherein the phosphorus element of the metal-like element of the molten pool is reduced to 0.066%, and the phosphorus element content of the metal-like element of the molten pool is increased to 0.09% when the oxygen blowing time is prolonged to about 8 ';
through multiple sampling and detection analysis, the phenomenon of phosphorus reflection can be caused by the increase of oxygen blowing time, the temperature rise and the further reduction of FeO in slag, and the appropriate slag pouring time is 4 '30' to 5 '30'.
Preferably, the third specific step is as follows:
s1, firstly, opening blowing and igniting, controlling the position of a light-shielding gun to be 1.3m, monitoring the content of CO in real time, and ensuring that the CO numerical curve is in a continuous rising trend through real-time monitoring of the CO numerical curve;
s2, improving the gun position and adding slag lime for slag foaming;
s3, if the CO curve is slowly lowered or raised and is maintained below 30%, the oxygen supply is increased or the gun position is lowered by 100mm, hard blowing is adopted, the control principle is that the CO curve is stably raised, the slag thickness is raised, and oxygen is continuously blown to 4 '30' to 5 '30'.
Preferably, the improvement of the gun position in the step three S2 can be divided into two times, the height of each gun position is 200mm, and the lime amount of the added slag is 300KG;
the reaction of C-O is slowed down by adopting a soft blowing operation, thereby ensuring the slag and proper foaming.
Preferably, in the step three, the feeding flow rate is increased to be 500m in the step S3 3 /h-1000m 3 And/h, when the CO curve slowly rises to 40% -50%, the carbon-oxygen reaction is indicated to enter a fierce period, gun lifting and deslagging can be adopted in advance, meanwhile, the slag lifting condition can be judged by manual experience according to the flame of the furnace mouth, the CO value and the numerical instruction are optimized, and the accuracy is high.
Preferably, the specific steps in the fourth step are as follows: with reference to fig. 2, after the open blow fires, the CO value curves from 2'05 "to 4' 40" (i.e., the trend of the CO% curve in the square area in fig. 2) are observed, and the height of the gun position is adjusted according to the trend of the CO value, so as to realize the overall stable rising of the CO value.
Preferably, in the fourth step, the specific adjustment principle of the gun position is that the CO value is continuously increased by 200mm, if the CO value is reduced, the gun position is reduced by 200mm, the time for lifting the gun and pouring slag is controlled to be 4 '30' to 5 '30', so that the FeO content in slag is reduced and the phosphorus element is removed to the maximum extent, and if the rising of the CO value curve is slowly maintained below 30%, a hard blowing mode can be adopted for reducing the gun position by 100 mm.
Preferably, the fifth specific step is as follows:
the oxygen blowing time of the slag before making is controlled between 4 '30' and 5 '30', the temperature measuring interval of the furnace pouring is between 1380 ℃ and 1460 ℃, the temperature of a molten pool is increased, and the Fe element of the slag is reduced into molten steel through C-O reaction, so that the FeO content of the slag in the earlier stage is reduced;
the nitrogen is converted at the furnace mouth of the gun lifting position, and iron beads in slag sink to separate iron slag when the slag is beaten, so that no iron flowers exist in the slag pouring process.
Preferably, in the fifth step, the nitrogen gas open time is 20 seconds, and the sampling monitoring is carried out on the deslagging in different time ranges from 4 '30' to 5 '30', so that the average FeO content of the slag sample for multiple times is about 13%, the iron loss of the earlier-stage slag is effectively reduced, and the consumption of steel materials is reduced.
Compared with the prior art, the invention has the beneficial effects that: the method for manufacturing the early-stage slag according to the CO value; according to the trend change of the CO value, gun positions and feeding materials are adjusted, proper deslagging time is controlled to achieve maximum removal of phosphorus elements and harmful substances, oxygen blowing time is properly prolonged, fe elements are reduced by utilizing a C-O reaction, feO content of early-stage slag is reduced, iron beads are reduced to the maximum extent, iron loss is reduced, and consumption of steel materials is reduced;
1. in the converter double slag method smelting, slag in the early stage of manufacture is changed according to the CO value, gun position adjustment and feeding operation are adopted, so that C-O reaction is performed uniformly, and the converting process is stabilized;
2. the proper slag foaming degree can be controlled, and the proper slag pouring time is achieved, so that dephosphorization is performed to the maximum extent and iron loss is reduced;
3. the slag lifting condition is judged according to the fire hole flame by artificial experience, and is optimized into CO value and numerical instruction to lead the slag in the early stage of the production, so that the accuracy is high.
Drawings
FIG. 1 is a graph showing the variation of the CO value curve according to the present invention;
FIG. 2 is a graph showing the effect of gun position height adjustment on CO value curve according to the present invention;
FIG. 3 is a schematic diagram of the content of the deslagging slag-like elements of the invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but 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 technical scheme of the invention is as follows: a method for making a preliminary slag based on CO values, comprising the steps of:
step one: sampling the molten bath metal: sampling molten pool metals with different oxygen blowing times;
the special molten metal sampling tool is adopted to sample molten pool metal at the temperature of about 1420 ℃ in the time of 4'30 ' to 5'30 ' and the time of about 8' of oxygen blowing time respectively.
Step two: analyzing the content of metal-like phosphorus elements in a molten pool: detecting the content of phosphorus element in a molten pool metal sample and analyzing proper oxygen blowing time and slag pouring time;
detecting the metal-like element of the molten pool in the first step, and sampling and analyzing to obtain that the dephosphorization rate of the metal-like element of the molten pool reaches 60% in the period from 4'30 ' to 5'30 ', wherein the phosphorus element of the metal-like element of the molten pool is reduced to 0.066%, and the phosphorus element content of the metal-like element of the molten pool is increased to 0.09% when the oxygen blowing time is prolonged to about 8 ';
through multiple sampling and detection analysis, the phenomenon of phosphorus reflection can be caused by the increase of oxygen blowing time, the temperature rise and the further reduction of FeO in slag, and the appropriate slag pouring time is 4 '30' to 5 '30'.
Step three: setting an initial position of a gun position and a control method for stably rising a CO value;
s1, firstly, opening blowing and igniting, controlling the position of a light-shielding gun to be 1.3m, monitoring the content of CO in real time, and ensuring that the CO numerical curve is in a continuous rising trend through real-time monitoring of the CO numerical curve;
s2, improving the gun position and adding slag lime for slag foaming; the gun position can be improved twice, the height of each gun position is 200mm, and the lime amount of the slag charge is 300KG;
slowing down the reaction of C-O by adopting soft blowing operation, thereby ensuring slag and proper foaming;
s3, if the CO curve is slowly lowered or raised and is maintained below 30%, raising the oxygen supply or lowering the gun position by 100mm, and adopting hard blowing, wherein the control principle is that the CO curve is stably raised, the slag thickness is raised, and oxygen is continuously blown to 4 '30' to 5 '30'; the improvement of the nutrient supply flow is 500m 3 /h-1000m 3 And/h, when the CO curve slowly rises to 40% -50%, the carbon-oxygen reaction is indicated to enter a fierce period, gun lifting and deslagging can be adopted in advance, meanwhile, the slag lifting condition can be judged by manual experience according to the flame of the furnace mouth, the CO value and the numerical instruction are optimized, and the accuracy is high.
Step four: setting and adjusting the gun position height: a reasonable gun position height adjustment rule is formulated according to the change of the CO numerical curve;
with reference to fig. 2, after the open blow fires, the CO value curves from 2'05 "to 4' 40" (i.e., the trend of the change of the CO% curve in the square frame area in fig. 2) are observed, and the height of the gun position is adjusted according to the trend of the change of the CO value, so as to realize the overall stable rising of the CO value;
the concrete regulation principle of the gun position is that the CO value is continuously increased by 200mm when the CO value is continuously increased, the gun position is reduced by 200mm when the CO value is reduced, and the time for lifting the gun and pouring slag is controlled to be 4 '30' to 5 '30', so that the FeO content in slag is reduced and the phosphorus element is removed to the maximum extent, and if the CO value curve is slowly maintained below 30%, a hard blowing mode can be adopted for reducing the gun position by 100 mm.
Step five: the iron loss of slag is reduced by converting nitrogen, nitrogen is simultaneously converted at the furnace mouth of the gun lifting position, and slag is beaten to achieve the effect of iron slag separation;
the oxygen blowing time of the slag before making is controlled between 4 '30' and 5 '30', the temperature measuring interval of the furnace pouring is between 1380 ℃ and 1460 ℃, the temperature of a molten pool is increased, and the Fe element of the slag is reduced into molten steel through C-O reaction, so that the FeO content of the slag in the earlier stage is reduced; converting nitrogen at the furnace mouth of the gun lifting position, and separating iron and slag due to iron beads sinking in slag during slag beating, so that no iron flowers exist in the slag pouring process;
the nitrogen gas opening time is 20 seconds, and the sampling monitoring is carried out on the deslagging in different time ranges from 4 '30' to 5 '30', so that the average FeO content of the slag sample for multiple times is about 13%, the iron loss of the earlier-stage slag is effectively reduced, and the consumption of steel materials is reduced.
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 (6)
1. A method for making a preliminary slag based on CO values, comprising the steps of:
step one: sampling the molten bath metal: sampling molten pool metals with different oxygen blowing times;
step two: analyzing the content of metal-like phosphorus elements in a molten pool: detecting the content of phosphorus element in a molten pool metal sample and analyzing oxygen blowing time and slag pouring time;
step three: the control method for setting the initial position of the gun position and stably rising the CO value comprises the following specific steps:
s1, firstly blowing and igniting, controlling the position of a light-proof gun to be 1.3m, monitoring the content of CO in real time, and ensuring that the CO value curve is in a continuous rising trend through real-time monitoring of the CO value curve;
s2, raising the gun position and adding slag lime for slag foaming, wherein the gun position is raised twice, the height of each gun position is 200mm, and the amount of the added slag lime is 300KG; slowing down the reaction of C-O by adopting soft blowing operation, thereby ensuring slag and proper foaming;
s3, if the CO curve is slowly lowered or raised and is maintained below 30%, raising the oxygen supply or lowering the gun position by 100mm, adopting hard blowing, wherein the control principle is that the CO curve is stably raised, the slag thickness is raised, continuously blowing oxygen to 4 '30' to 5 '30', raising the oxygen supply to 500 m/h-1000 m/h, and when the CO curve is slowly raised to 40% -50%, indicating that the carbon-oxygen reaction enters a fierce period, adopting advanced gun lifting and deslagging;
step four: setting and adjusting the gun position height: setting a gun position height adjustment rule according to the change of the CO numerical curve;
step five: the iron loss of slag is reduced by converting nitrogen, the nitrogen is converted at the furnace mouth of the gun lifting position, and the effect of separating iron slag is achieved by beating slag.
2. The method for producing the pre-slag according to the CO value as set forth in claim 1, wherein the step one is specifically as follows:
the special molten metal sampling tool is adopted to sample molten pool metal at the temperature of about 1420 ℃ in the time of 4'30 ' to 5'30 ' and the time of about 8' of oxygen blowing time respectively.
3. The method for producing the pre-slag according to the CO value of claim 1, wherein the second specific step is;
detecting the metal-like element of the molten pool in the first step, and sampling and analyzing to obtain that the dephosphorization rate of the metal-like element of the molten pool reaches 60% in the period from 4'30 ' to 5'30 ', wherein the phosphorus element of the metal-like element of the molten pool is reduced to 0.066%, and the phosphorus element content of the metal-like element of the molten pool is increased to 0.09% when the oxygen blowing time is prolonged to about 8 ';
through multiple sampling and detection analysis, the phenomenon of phosphorus reflection can be caused by the increase of oxygen blowing time, the temperature rise and the further reduction of FeO in slag, and the appropriate slag pouring time is 4 '30' to 5 '30'.
4. The method for producing the pre-slag according to the CO value as claimed in claim 1, wherein the specific adjustment principle of the gun position in the fourth step is that the gun position is increased by 200mm when the CO value is continuously increased, the gun position is reduced by 200mm when the CO value is reduced, the gun lifting and slag pouring time is controlled to be 4 '30' to 5 '30', so that the FeO content in the slag is reduced and the phosphorus element is removed to the maximum extent, and a hard blowing mode is adopted to reduce the gun position by 100mm when the CO value curve is slowly maintained below 30%.
5. The method for producing the pre-slag according to the CO value as set forth in claim 1, wherein the fifth step is as follows:
the oxygen blowing time of the slag before making is controlled between 4 '30' and 5 '30', the temperature measuring interval of the furnace pouring is between 1380 ℃ and 1460 ℃, the temperature of a molten pool is increased, and the Fe element of the slag is reduced into molten steel through C-O reaction, so that the FeO content of the slag in the earlier stage is reduced;
the nitrogen is converted at the furnace mouth of the gun lifting position, and iron beads in slag sink to separate iron slag when the slag is beaten, so that no iron flowers exist in the slag pouring process.
6. The method for manufacturing the early slag according to the CO value, which is characterized by comprising the step five, wherein the nitrogen gas open time is 20 seconds, and the average FeO content of multiple slag samples is about 13% by sampling and monitoring the deslagging in different time ranges from 4 '30' to 5 '30', so that the iron loss of the early slag is effectively reduced, and the consumption of steel materials is reduced.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100749023B1 (en) * | 2006-05-26 | 2007-08-14 | 주식회사 포스코 | Method for refining extra low phosphorous steel in converter |
| CN105177216A (en) * | 2015-09-11 | 2015-12-23 | 唐山不锈钢有限责任公司 | Method for judging opportunity of lifting lance to pour away converter double slag |
| CN112481439A (en) * | 2020-11-10 | 2021-03-12 | 江苏省沙钢钢铁研究院有限公司 | Smelting process of converter low-phosphorus steel |
| CN114231686A (en) * | 2021-11-26 | 2022-03-25 | 山东钢铁集团永锋临港有限公司 | Method for smelting with less slag left under converter dry dedusting process condition |
| CN115188426A (en) * | 2022-07-12 | 2022-10-14 | 山东钢铁集团永锋临港有限公司 | Implementation method for pre-judging and pre-controlling smelting process of converter by CO concentration curve |
| CN115323099A (en) * | 2022-07-22 | 2022-11-11 | 马鞍山钢铁股份有限公司 | Steelmaking method for recycling magnetic separation steel slag by converter |
-
2022
- 2022-11-21 CN CN202211454185.4A patent/CN115747405B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100749023B1 (en) * | 2006-05-26 | 2007-08-14 | 주식회사 포스코 | Method for refining extra low phosphorous steel in converter |
| CN105177216A (en) * | 2015-09-11 | 2015-12-23 | 唐山不锈钢有限责任公司 | Method for judging opportunity of lifting lance to pour away converter double slag |
| CN112481439A (en) * | 2020-11-10 | 2021-03-12 | 江苏省沙钢钢铁研究院有限公司 | Smelting process of converter low-phosphorus steel |
| CN114231686A (en) * | 2021-11-26 | 2022-03-25 | 山东钢铁集团永锋临港有限公司 | Method for smelting with less slag left under converter dry dedusting process condition |
| CN115188426A (en) * | 2022-07-12 | 2022-10-14 | 山东钢铁集团永锋临港有限公司 | Implementation method for pre-judging and pre-controlling smelting process of converter by CO concentration curve |
| CN115323099A (en) * | 2022-07-22 | 2022-11-11 | 马鞍山钢铁股份有限公司 | Steelmaking method for recycling magnetic separation steel slag by converter |
Non-Patent Citations (2)
| Title |
|---|
| CO曲线与音频化渣应用生产实践;彭灿锋;;冶金与材料(05);全文 * |
| 应用烟气分析动态控制技术冶炼高硅铁水的实践;吴明;石知机;;钢铁(12);全文 * |
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