CN114717397A - Method for optimally controlling generation of scale of thin-gauge steel plate - Google Patents
Method for optimally controlling generation of scale of thin-gauge steel plate Download PDFInfo
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- CN114717397A CN114717397A CN202210425874.6A CN202210425874A CN114717397A CN 114717397 A CN114717397 A CN 114717397A CN 202210425874 A CN202210425874 A CN 202210425874A CN 114717397 A CN114717397 A CN 114717397A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 54
- 239000010959 steel Substances 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000010438 heat treatment Methods 0.000 claims abstract description 59
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 48
- 238000002791 soaking Methods 0.000 claims abstract description 25
- 239000007789 gas Substances 0.000 claims abstract description 21
- 239000003546 flue gas Substances 0.000 claims abstract description 14
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 34
- 239000000446 fuel Substances 0.000 claims description 26
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 15
- 229910052760 oxygen Inorganic materials 0.000 claims description 15
- 239000001301 oxygen Substances 0.000 claims description 15
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 238000005070 sampling Methods 0.000 claims description 6
- 230000001276 controlling effect Effects 0.000 claims 7
- 239000003517 fume Substances 0.000 claims 2
- 230000001105 regulatory effect Effects 0.000 claims 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 22
- 229910052742 iron Inorganic materials 0.000 abstract description 11
- 239000000779 smoke Substances 0.000 abstract description 11
- 238000000227 grinding Methods 0.000 abstract description 3
- 238000005096 rolling process Methods 0.000 description 7
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000003908 quality control method Methods 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000027734 detection of oxygen Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
- C21D1/76—Adjusting the composition of the atmosphere
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D11/00—Process control or regulation for heat treatments
-
- 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
- Y02P10/25—Process efficiency
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Control Of Heat Treatment Processes (AREA)
Abstract
The invention discloses a method for optimally controlling the generation of scale on a thin steel plate, wherein a preheating section, a first adding section, a second adding section, a third adding section and a soaking section are arranged in a heating furnace in sections, when a steel plate blank is heated in the furnace, smoke is sampled from each section in the heating furnace, the sampled smoke is detected to obtain the furnace atmosphere of each section in the heating furnace, the furnace atmosphere of each section in the heating furnace is correspondingly adjusted according to the obtained furnace atmosphere of each section, so that harmful gas in the preheating section is completely combusted, each gas in the first adding section and the second adding section is completely combusted, and the harmful gas in the third adding section and the soaking section is weak reducibility. The furnace atmosphere of a preheating section, a first adding section and a second adding section in the heating furnace is controlled to reduce the emission of harmful components in the tail gas of the flue gas; the furnace atmosphere of a three-adding section and a soaking section which are easy to generate iron scales in the heating furnace is controlled to reduce the iron scales on the surface of steel and improve the surface quality of the steel plate, thereby reducing the grinding rate of the steel plate.
Description
Technical Field
The invention belongs to the technical field of quality control of thick steel plates and plates, and particularly relates to a method for optimally controlling the generation of scale on a thin steel plate.
Background
In the production of thick steel plate products, the steel plate with the medium thickness of 6mm and the thin specification is more in demand, and in the existing production technology, when the thick plate production line rolls the specification, a heating furnace is needed to heat the plate blank, and after the plate blank is rolled to the target specification by a continuous rolling mill, the plate blank is cut to length in sections. In the heating process of a heating furnace, because the rolling force of steel plates with the specifications is large and the heat dissipation is fast, the heating temperature is generally adopted to be 1250-1270 ℃ during heating, more iron oxide scales can be generated on the surface of a plate blank in the heating process of the heating furnace, and in the existing heating process, the atmosphere in the heating furnace is not accurately judged, whether the mixed gas of the heating furnace completes combustion or not is judged mainly by detecting the oxygen content and the carbon monoxide content at the inlet position of a flue of the heating furnace, and the whole furnace combustion condition is fed back only at the detected position, the combustion condition of the plate blank at each heating section position is not clear, so that the excessive iron oxide scales are generated in the heating process of the plate blank, and even the oxidation is repeatedly performed for many times.
After a steel plate is heated by a heating furnace, before rolling by a continuous rolling mill, scale on the surface of the steel plate is removed by high-pressure descaling water of a descaling box and descaling water of the rolling mill, and because the temperature of the steel plate with the thickness of 6mm is rapidly reduced in the rolling production, excessive water spraying descaling cannot be performed, and because the scale cannot be removed for many times, the scale is pressed into the surface of the steel plate in the rolling process of the steel plate due to excessive scale, the surface of the steel plate needs to be polished, so that the cost of steel plate production is increased, and the quality defect of the steel plate can be generated.
Disclosure of Invention
In order to solve at least one of the above technical problems, the present invention provides a method for optimally controlling the generation of scale on a thin gauge steel plate.
The purpose of the invention is realized by the following technical scheme:
the invention provides a method for optimally controlling the generation of scale on a thin steel plate, wherein a preheating section, a first adding section, a second adding section, a third adding section and a soaking section are arranged in a heating furnace in sections, when a steel plate blank is heated in the furnace, smoke is sampled from each section in the heating furnace, the sampled smoke is detected to obtain the furnace atmosphere of each section in the heating furnace, the air-fuel ratio coefficient in each section of the furnace is correspondingly adjusted according to the obtained furnace atmosphere of each section, so that carbon monoxide in the preheating section is completely combusted, oxygen and carbon monoxide in the first adding section and the second adding section are completely combusted, and carbon monoxide in the third adding section and the soaking section is weak in reducibility.
As a further improvement, the middle part of each section in the heating furnace is provided with a flue gas sampling port, and the flue gas is sampled from the flue gas sampling ports of the sections when the flue gas is sampled from the sections in the heating furnace.
As a further improvement, the detection of the sampled smoke comprises the detection of oxygen content and carbon monoxide content information in the sampled smoke.
As a further improvement, when the obtained atmosphere in each section of furnace is correspondingly adjusted, and when the gas in the atmosphere in the preheating section is excessive, the air-fuel ratio coefficient of the preheating section is adjusted, so that the carbon monoxide in the preheating section is completely combusted.
As a further improvement, when the obtained furnace atmosphere of each section is correspondingly adjusted, when the air in the furnace atmosphere of an additional section is excessive, the air-fuel ratio coefficient of the additional section is adjusted to ensure that the oxygen of the additional section is completely combusted; when the gas in the furnace atmosphere of the adding section is excessive, the air-fuel ratio coefficient of the adding section is adjusted to enable the carbon monoxide of the adding section to be completely combusted.
As a further improvement, when the obtained furnace atmosphere of each section is correspondingly adjusted, when the air in the furnace atmosphere of the second adding section is excessive, the air-fuel ratio coefficient of the second adding section is adjusted to ensure that the oxygen of the second adding section is completely combusted; when the gas in the furnace atmosphere of the second adding section is excessive, the air-fuel ratio coefficient of the second adding section is adjusted to enable the carbon monoxide of the second adding section to be completely combusted.
As a further improvement, when the obtained atmosphere in each stage of the furnace is correspondingly adjusted, and when the air in the atmosphere in the three-plus-stage furnace is excessive, the air-fuel ratio coefficient of the three-plus-stage furnace is adjusted, so that the carbon monoxide in the three-plus-stage furnace is in weak reducibility.
As a further improvement, when the furnace atmosphere of each section is correspondingly adjusted according to the obtained furnace atmosphere, and when the air in the furnace atmosphere of the soaking section is excessive, the air-fuel ratio coefficient of the soaking section is adjusted, so that the carbon monoxide in the soaking section is in weak reducibility.
The invention provides a method for optimally controlling the generation of scale on a thin steel plate, wherein a preheating section, a first adding section, a second adding section, a third adding section and a soaking section are arranged in a heating furnace in sections, when a steel plate blank is heated in the furnace, smoke is sampled from each section in the heating furnace, the sampled smoke is detected to obtain the furnace atmosphere of each section in the heating furnace, the air-fuel ratio coefficient in each section in the furnace is correspondingly adjusted according to the obtained furnace atmosphere of each section, so that carbon monoxide in the preheating section is completely combusted, oxygen and carbon monoxide in the first adding section and the second adding section are completely combusted, and carbon monoxide in the third adding section and the soaking section is weak in reducibility. The furnace atmosphere of the preheating section, the first adding section and the second adding section in the heating furnace is controlled, so that the emission of harmful components such as carbon monoxide and the like in the tail gas smoke in the preheating section, the first adding section and the second adding section is reduced; the furnace atmosphere of a three-heating section and a soaking section which are easy to generate iron scales in a heating furnace is controlled, and the oxygen content in the three-heating section and the soaking section is properly reduced to ensure that harmful gas is weak reducibility, so that the generation of the iron scales on the surface of the steel is reduced. According to the invention, under the condition of not modifying equipment and adding equipment cost, the heating process of the heating furnace is changed to reduce the generation of iron scales of the thin-specification steel plate in the heating process, and the surface quality of the steel plate is improved, so that the grinding rate of the steel plate is reduced.
Drawings
The invention is further illustrated by means of the attached drawings, but the embodiments in the drawings do not constitute any limitation to the invention, and for a person skilled in the art, other drawings can be obtained on the basis of the following drawings without inventive effort.
FIG. 1 is a schematic view of the process of the present invention.
FIG. 2 is a statistical chart of the production of thin gauge steel plates in one 7 month and four batches according to the embodiment of the present invention.
Fig. 3 is a schematic view of the thinning rate trend of thin gauge steel plates of one 7 month and four batches in the embodiment of the invention.
FIG. 4 is a schematic diagram of the proportion of thinning blocks of thin steel plates of second 7 months and third 8 months in the embodiment of the invention.
FIG. 5 is a comparative illustration of thinning reasons of the thin gauge steel plates in the second 7 th month and the 8 th month according to the embodiment of the present invention.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings and specific embodiments, and it is to be noted that the embodiments and features of the embodiments of the present application can be combined with each other without conflict.
Referring to fig. 1, an embodiment of the present invention provides a method for optimally controlling the generation of scale on a thin steel plate, wherein a preheating section, a first heating section, a second heating section, a third heating section and a soaking section are arranged in a heating furnace in sections. The method comprises the following steps that a flue gas sampling port 1 is arranged in the middle of each section in a heating furnace, when a steel plate blank is heated in the furnace, flue gas is sampled from the flue gas sampling port 1 of each section of the heating furnace, so that the combustion condition of each section of the heating furnace can be more accurately obtained, information such as oxygen content, carbon monoxide content and the like in the sampled flue gas is detected, the furnace atmosphere of each section in the heating furnace is obtained, and when the atmosphere air in the furnace is excessive, the fact that the oxygen content of the section in the heating furnace is excessive is shown, and the steel plate blank is easy to generate iron scale; when the gas in the furnace atmosphere is excessive, the carbon monoxide content in the section of the heating furnace is excessive, and the steel plate blank is not easy to generate scale.
Through on-site observation and analysis, taking the Zhanjiang steel production line as an example, the thickness of the iron scale generated by the steel plate blank in the heating process of the heating furnace is more than that of the iron scale generated in the heating process of the two-heating section, the three-heating section and the soaking section in the high-temperature section of the heating furnace, particularly, the three-heating section and the soaking section, while the low-temperature sections in the preheating section and the one-heating section are less oxidized and have low sensitivity to the atmosphere in the furnace.
And correspondingly adjusting the air-fuel ratio coefficient in each section of furnace according to the obtained atmosphere in each section of furnace, adjusting the air-fuel ratio coefficient of the preheating section when the gas in the atmosphere in the preheating section is excessive, adjusting the air-fuel ratio coefficient of the section from 1 to 1.02 to completely burn harmful gas in the preheating section, mainly completely burn carbon monoxide, and completely convert tail smoke of the preheating section into nontoxic and harmless gas such as carbon dioxide and the like without detecting the content of the carbon monoxide. When air in the furnace atmosphere of the first adding section is excessive, adjusting the air-fuel ratio coefficient of the first adding section to ensure that oxygen of the first adding section is completely combusted; when the gas in the furnace atmosphere of the adding section is excessive, the air-fuel ratio coefficient of the adding section is adjusted to enable the carbon monoxide of the adding section to be completely combusted. When the air in the furnace atmosphere of the second adding section is excessive, adjusting the air-fuel ratio coefficient of the second adding section to ensure that the oxygen of the second adding section is completely combusted; when the gas in the furnace atmosphere of the second adding section is excessive, the air-fuel ratio coefficient of the second adding section is adjusted to enable the carbon monoxide of the second adding section to be completely combusted. When the air in the furnace atmosphere of the three-addition section is excessive, the air-fuel ratio coefficient of the three-addition section is adjusted, the coefficient in the three-addition section is controlled to be between 0.98 and 1, so that the carbon monoxide in the three-addition section is less than or equal to 5-20ppm, and the carbon monoxide is in weak reducibility. When the air in the furnace atmosphere of the soaking section is excessive, the air-fuel ratio coefficient of the soaking section is adjusted, the coefficient in the soaking section is controlled to be 0.98-1, so that the carbon monoxide in the soaking section is less than or equal to 5-20ppm, and the carbon monoxide is in weak reducibility.
The furnace atmosphere of a preheating section and an adding section in a low-temperature section in the heating furnace is controlled, so that the emission of harmful components such as carbon monoxide and the like in tail gas smoke in the preheating section and the adding section is reduced; the furnace atmosphere of a three-heating section and a soaking section which are easy to generate iron scales in the heating furnace is controlled, and the oxygen content in the three-heating section and the soaking section is properly reduced to ensure that harmful gas is weak reducibility, so that the generation of the iron scales on the surface of steel is reduced, the surface quality of a steel plate is improved, and the grinding rate of the steel plate is reduced.
The first embodiment of the invention:
referring to the graph shown in FIGS. 2 and 3, 410 blocks of thin gauge steel plate with 6mm Zhanjiang steel in 2020 and 7 months are co-rolled, the weight is 1664.7 tons, and the average furnace tapping temperature is 1270 ℃. By adopting the method, the iron scale press-in rate is 22.61% in 7-month and 8-day and 5.85% in 31-day, and the total is in a rapid descending trend.
The second embodiment of the invention:
for further verification, the whole-course tracking is carried out again when the thin-specification steel plate is produced in 8 months in 2020 by combining with the graphs shown in fig. 4 and 5, 388 blocks are rolled in 6mm thin-specification steel plate in 8 months in 2020, 1514 tons is calculated, the average furnace tapping temperature is 1270 ℃, the quality and process control level is obviously improved compared with that in 7 months, and the mass defect ratio is reduced from 19.54% to 4.96%.
In the description above, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore should not be construed as limiting the scope of the present invention.
In conclusion, although the present invention has been described with reference to the preferred embodiments, it should be noted that various changes and modifications can be made by those skilled in the art, and they should be included in the scope of the present invention unless they depart from the scope of the present invention.
Claims (8)
1. A method for optimizing and controlling the generation of scale on thin steel plate features that when the steel plate blank is heated in furnace, the fume is sampled from each segment in the furnace, the sampled fume is detected to obtain the atmosphere in furnace, the air-fuel ratio coefficient in furnace is regulated according to the obtained atmosphere in each segment to burn the carbon monoxide in preheating segment completely, the oxygen and carbon monoxide in first and second segments burn completely, and the carbon monoxide in three and soaking segments is weak in reducibility.
2. The method for optimizing and controlling the production of scale on a thin gauge steel plate according to claim 1, wherein a flue gas sampling port is provided in the middle of each section in the heating furnace, and the flue gas is sampled from the flue gas sampling port of each section when each section in the heating furnace is sampled.
3. The method for optimizing and controlling the production of the scale of the thin gauge steel plate as claimed in claim 1 or 2, wherein the detecting the sampled flue gas comprises detecting the oxygen content and the carbon monoxide content information in the sampled flue gas.
4. The method as claimed in claim 1, wherein when the furnace atmosphere of each section is adjusted correspondingly, the air-fuel ratio coefficient of the preheating section is adjusted to make the carbon monoxide in the preheating section burn completely when the gas in the furnace atmosphere of the preheating section is excessive.
5. The method for optimizing and controlling the scale generation of the thin gauge steel plate according to claim 1, wherein when the obtained atmosphere in each segment of the furnace is correspondingly adjusted, when the air in the atmosphere in an additional segment of the furnace is excessive, the air-fuel ratio coefficient of the additional segment is adjusted to enable the oxygen in the additional segment to be completely combusted; when the gas in the furnace atmosphere of the adding section is excessive, the air-fuel ratio coefficient of the adding section is adjusted to enable the carbon monoxide of the adding section to be completely combusted.
6. The method for optimizing and controlling the generation of the scale on the thin gauge steel plate according to claim 1, wherein when the obtained atmosphere in each section of the furnace is correspondingly adjusted, when the air in the atmosphere in the second-plus section of the furnace is excessive, the air-fuel ratio coefficient of the second-plus section is adjusted to enable the oxygen in the second-plus section to be completely combusted; when the gas in the furnace atmosphere of the second adding section is excessive, the air-fuel ratio coefficient of the second adding section is adjusted to enable the carbon monoxide of the second adding section to be completely combusted.
7. The method for optimizing and controlling the generation of the scale on the thin gauge steel plate according to claim 1, wherein when the obtained furnace atmosphere of each section is correspondingly adjusted, when the air in the furnace atmosphere of the three-plus-section is excessive, the air-fuel ratio coefficient of the three-plus-section is adjusted to make the carbon monoxide of the three-plus-section have weak reducibility.
8. The method for optimizing and controlling the generation of the scale on the thin gauge steel plate according to claim 1, wherein when the obtained atmosphere in each section of the furnace is correspondingly adjusted, when the air in the atmosphere in the soaking section is excessive, the air-fuel ratio coefficient of the soaking section is adjusted to make the carbon monoxide in the soaking section have weak reducibility.
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| CN202210425874.6A CN114717397A (en) | 2022-04-21 | 2022-04-21 | Method for optimally controlling generation of scale of thin-gauge steel plate |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120070171A (en) * | 2010-12-21 | 2012-06-29 | 주식회사 포스코 | Heating method for steel material of producing wire for reducing high temperature scale |
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| CN106370021A (en) * | 2016-08-29 | 2017-02-01 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Control method for air-fuel ratio of pusher heat accumulating type heating furnace |
| CN107764076A (en) * | 2017-11-20 | 2018-03-06 | 马鞍山钢铁股份有限公司 | A kind of heater for rolling steel combustion control system and control method |
| CN108444297A (en) * | 2018-02-13 | 2018-08-24 | 鞍钢股份有限公司 | Method for adjusting atmosphere in steel rolling heating furnace |
-
2022
- 2022-04-21 CN CN202210425874.6A patent/CN114717397A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120070171A (en) * | 2010-12-21 | 2012-06-29 | 주식회사 포스코 | Heating method for steel material of producing wire for reducing high temperature scale |
| CN102634651A (en) * | 2011-02-11 | 2012-08-15 | 宝山钢铁股份有限公司 | Heating method of weak, micro-oxidation and oxidation combustion for ferrous metal steel slab |
| CN106370021A (en) * | 2016-08-29 | 2017-02-01 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Control method for air-fuel ratio of pusher heat accumulating type heating furnace |
| CN107764076A (en) * | 2017-11-20 | 2018-03-06 | 马鞍山钢铁股份有限公司 | A kind of heater for rolling steel combustion control system and control method |
| CN108444297A (en) * | 2018-02-13 | 2018-08-24 | 鞍钢股份有限公司 | Method for adjusting atmosphere in steel rolling heating furnace |
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