CN108570529B - Method for promoting reaction balance of converter - Google Patents
Method for promoting reaction balance of converter Download PDFInfo
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- CN108570529B CN108570529B CN201810464726.9A CN201810464726A CN108570529B CN 108570529 B CN108570529 B CN 108570529B CN 201810464726 A CN201810464726 A CN 201810464726A CN 108570529 B CN108570529 B CN 108570529B
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- converter
- end point
- blowing
- oxygen content
- controlling
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- 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
- C21C5/35—Blowing from above and through the bath
Abstract
The invention relates to the technical field of converter smelting, in particular to a method for promoting converter reaction balance, which comprises the following steps: measuring and obtaining the end point carbon content and the end point oxygen content of the converter at the blowing end point of the top-bottom combined blown converter; adjusting the time and the flow of bottom-blown argon of the top-bottom combined blown converter according to the end point carbon content and the end point oxygen content of the converter; and tapping after the blowing at the bottom of the top-bottom combined blowing converter is finished. According to the method, the carbon content and the oxygen content of the converter end point are obtained at the blowing end point of the top-bottom combined blowing converter, and then the bottom argon blowing time and the bottom argon blowing flow of the top-bottom combined blowing converter are adjusted according to the carbon content and the oxygen content of the converter end point.
Description
Technical Field
The invention relates to the technical field of converter smelting, in particular to a method for promoting converter reaction balance.
Background
With the deterioration of raw materials and the stricter requirements on products in the downstream, for converter steelmaking, the requirements of the refining process on the end point carbon content, the oxygen content and the phosphorus content of the converter are lower, and the uniform mixing effect of molten steel is also required to be good, so that the abnormal temperature fluctuation in the refining process caused by the poor uniform mixing effect of the molten steel in the refining process is avoided.
In the prior art, the reaction of the steel slag in the converter is often not balanced at the end point of the converter, and the phosphorus content and the oxygen content are higher if tapping is carried out at the moment, so that the increase of deoxidation alloy and the increase of inclusions are finally caused, and the product quality is influenced.
Disclosure of Invention
In view of the above, the present invention has been developed to provide a method of promoting the equilibrium of converter reactions that overcomes, or at least partially solves, the above-mentioned problems.
The embodiment of the invention provides a method for promoting converter reaction balance, which comprises the following steps:
measuring and obtaining the end point carbon content and the end point oxygen content of the converter at the blowing end point of the top-bottom combined blown converter;
adjusting the time and the flow of bottom-blown argon of the top-bottom combined blown converter according to the end point carbon content and the end point oxygen content of the converter;
and tapping after the blowing at the bottom of the top-bottom combined blowing converter is finished.
Preferably, the adjusting of the time and the flow of the bottom-blown argon of the top-bottom combined blown converter according to the end point carbon content and the end point oxygen content of the converter comprises:
under the condition that the converter endpoint carbon content is greater than or equal to 0.050 wt%:
when the oxygen content at the end point of the converter is more than or equal to 0.060 wt%, controlling the time of bottom blowing argon gas to be 3-4min and controlling the flow rate of the bottom blowing argon gas to be 800-3/h；
When the range of the terminal oxygen content of the converter is 0.040-0.060 wt%, controlling the time of bottom blowing argon gas to be 2-3min and controlling the flow of the bottom blowing argon gas to be 600-3/h；
And when the oxygen content at the end point of the converter is less than or equal to 0.040 wt%, directly tapping.
Preferably, the adjusting of the time and the flow of the bottom-blown argon of the top-bottom combined blown converter according to the end point carbon content and the end point oxygen content of the converter comprises:
under the condition that the range of the converter end point carbon content is 0.030-0.050 wt%:
when the oxygen content at the end point of the converter is more than or equal to 0.060 wt%, controlling the time of bottom blowing argon gas to be 2-3min and controlling the flow of the bottom blowing argon gas to be 600-3/h；
When the range of the terminal oxygen content of the converter is 0.040-0.060 wt%, controlling the bottom blowing argon gas time to be 1-2min and controlling the bottom blowing argon gas flow to be 400-600m3/h；
And when the oxygen content at the end point of the converter is less than or equal to 0.040 wt%, directly tapping.
Preferably, the adjusting of the time and the flow of the bottom-blown argon of the top-bottom combined blown converter according to the end point carbon content and the end point oxygen content of the converter comprises:
under the condition that the end point carbon content of the converter is less than or equal to 0.030 wt%:
when the terminal oxygen content of the converter is more than or equal to 0.070 wt%, controlling the time of bottom blowing argon gas to be 1-2min and controlling the flow of the bottom blowing argon gas to be 600-800m3/h；
When the range of the terminal oxygen content of the converter is 0.050-0.070 wt%, controlling the time of bottom blowing argon gas to be 1-2min and controlling the flow of the bottom blowing argon gas to be 400-3/h；
And when the oxygen content at the end point of the converter is less than or equal to 0.050 wt%, directly tapping.
Preferably, the tapping mode is slag-stopping tapping.
One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:
according to the method, the carbon content and the oxygen content of the converter end point are obtained at the blowing end point of the top-bottom combined blowing converter, and then the bottom argon blowing time and the bottom argon blowing flow of the top-bottom combined blowing converter are adjusted according to the carbon content and the oxygen content of the converter end point.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 shows a flow diagram of a method for promoting equilibrium of a converter reaction in an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
An embodiment of the present invention provides a method for promoting the equilibrium of the reaction in a converter, as shown in fig. 1, the method comprising:
step 101: and measuring and obtaining the converter end carbon content and the converter end oxygen content at the blowing end of the top-bottom combined blown converter.
Step 102: and adjusting the time and the flow of bottom-blown argon of the top-bottom combined blown converter according to the end point carbon content and the end point oxygen content of the converter.
Step 103: and tapping after the blowing at the bottom of the top-bottom combined blowing converter is finished.
According to the embodiment of the invention, the carbon content and the oxygen content of the converter end point are obtained at the blowing end point of the top-bottom combined blown converter, and then the bottom argon blowing time and the bottom argon blowing flow of the top-bottom combined blown converter are adjusted according to the carbon content and the oxygen content of the converter end point.
Further, for step 102, the end point carbon content of the converter is first determined, when the end point carbon content of the converter is greater than or equal to 0.050 wt%, when the end point oxygen content of the converter is greater than or equal to 0.060 wt%, the bottom-blown argon time is controlled to be 3-4min, and the bottom-blown argon flow is controlled to be 800-3H, when the end point oxygen content of the converter is in the range of 0.040-0.060 wt%, controlling the bottom argon blowing time to be 2-3min and controlling the bottom argon blowing flow to be 600-3H, when the converter end point oxygen content is less than or equal to 0.04When the weight percent is 0 percent, tapping is directly carried out. When the end point carbon content of the converter is in the range of 0.030 to 0.050 wt%, when the end point oxygen content of the converter is greater than or equal to 0.060 wt%, controlling the bottom blowing argon time to be 2 to 3min and controlling the bottom blowing argon flow to be 600-800 m-3H, when the end point oxygen content of the converter is in the range of 0.040-0.060 wt%, controlling the bottom blowing argon gas time to be 1-2min and controlling the bottom blowing argon gas flow to be 400-3And/h, directly tapping when the oxygen content at the end point of the converter is less than or equal to 0.040 wt%. When the end point carbon content of the converter is less than or equal to 0.030 wt%, when the end point oxygen content of the converter is greater than or equal to 0.070 wt%, controlling the time of bottom blowing argon to be 1-2min and controlling the flow of bottom blowing argon to be 600-800 m-3H, when the range of the terminal oxygen content of the converter is 0.050 to 0.070 wt%, controlling the time of bottom blowing argon to be 1 to 2min and controlling the flow of the bottom blowing argon to be 400-3And/h, directly tapping when the oxygen content at the end point of the converter is less than or equal to 0.050 wt%. The embodiment of the invention can further promote the reaction balance of the steel slag and improve the product quality by the specific control mode.
In the embodiment of the invention, the tapping mode is slag-stopping tapping.
Three examples are provided below to illustrate in detail the method of promoting the equilibrium of the converter reaction of the present invention.
Example one
At the blowing end point of the top-bottom combined blown converter, the measured end point carbon content of the converter is 0.052 wt%, and the measured end point oxygen content of the converter is 0.061 wt%, then the bottom-blown argon flow is controlled to be 1000m3And h, controlling the time of bottom blowing argon gas to be 3min, and finally, tapping after the blowing at the bottom of the top-bottom combined blowing converter is finished.
Example two
At the blowing end point of the top-bottom combined blown converter, the measured end point carbon content of the converter is 0.058 wt%, and the measured end point oxygen content of the converter is 0.040 wt%, then the bottom-blown argon flow is controlled to be 800m3And h, controlling the time of bottom blowing argon gas to be 3min, and finally, tapping after the blowing at the bottom of the top-bottom combined blowing converter is finished.
EXAMPLE III
And at the blowing end point of the top-bottom combined blown converter, directly tapping when the carbon content at the end point of the converter is measured to be 0.055 wt% and the oxygen content at the end point of the converter is measured to be 0.039 wt%.
Example four
At the blowing end point of the top-bottom combined blown converter, the measured end point carbon content of the converter is 0.035 wt%, the measured end point oxygen content of the converter is 0.075 wt%, and then the bottom-blown argon flow is controlled to be 700m3And h, controlling the time of bottom blowing argon gas to be 2min, and finally, tapping after the blowing at the bottom of the top-bottom combined blowing converter is finished.
EXAMPLE five
At the blowing end point of the top-bottom combined blown converter, the measured and obtained converter end point carbon content is 0.045 wt%, and the converter end point oxygen content is 0.050 wt%, and then the bottom-blown argon flow is controlled to be 500m3And h, controlling the time of bottom blowing argon gas to be 2min, and finally, tapping after the blowing at the bottom of the top-bottom combined blowing converter is finished.
EXAMPLE six
And at the blowing end point of the top-bottom combined blown converter, measuring to obtain that the carbon content at the end point of the converter is 0.046 wt%, and the oxygen content at the end point of the converter is 0.038 wt%, and directly tapping.
EXAMPLE seven
At the blowing end point of the top-bottom combined blown converter, the measured end point carbon content of the converter is 0.024 wt%, and the measured end point oxygen content of the converter is 0.080 wt%, then the flow of bottom-blown argon is controlled to be 600m3And h, controlling the time of bottom blowing argon gas to be 1min, and finally, tapping after the blowing at the bottom of the top-bottom combined blowing converter is finished.
Example eight
At the blowing end point of the top-bottom combined blown converter, the measured end point carbon content of the converter is 0.027 wt%, the measured end point oxygen content of the converter is 0.064 wt%, and then the bottom-blown argon flow is controlled to be 400m3And h, controlling the time of bottom blowing argon gas to be 1min, and finally, tapping after the blowing at the bottom of the top-bottom combined blowing converter is finished.
Example nine
And at the blowing end point of the top-bottom combined blown converter, measuring to obtain that the carbon content at the end point of the converter is 0.030 wt%, and the oxygen content at the end point of the converter is 0.050 wt%, and directly tapping.
In a word, the embodiment of the invention obtains the carbon content and the oxygen content of the end point of the converter at the blowing end point of the top-bottom combined blowing converter, and then adjusts the bottom argon blowing time and the bottom argon blowing flow of the top-bottom combined blowing converter according to the carbon content and the oxygen content of the end point of the converter.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (2)
1. A method of promoting the equilibrium of a converter reaction, the method comprising:
measuring and obtaining the end point carbon content and the end point oxygen content of the converter at the blowing end point of the top-bottom combined blown converter;
adjusting the time and the flow of bottom-blown argon of the top-bottom combined blown converter according to the end point carbon content and the end point oxygen content of the converter;
tapping after the blowing at the bottom of the top-bottom combined blowing converter is finished;
wherein, according to the converter terminal carbon content and the converter terminal oxygen content, adjusting the bottom argon blowing time and the bottom argon blowing flow of the top-bottom combined blown converter comprises:
under the condition that the converter end point carbon content is equal to 0.050 wt%: when the oxygen content at the end point of the converter is equal to 0.060 wt%, controlling the time of bottom blowing argon gas to be 3-4min and controlling the flow rate of the bottom blowing argon gas to be 800-3H; when the converter is usedWhen the end point oxygen content is more than 0.040 wt% and less than 0.060 wt%, controlling the bottom argon blowing time to be 2-3min and controlling the bottom argon blowing flow to be more than 600m3H is less than 800m3H; when the oxygen content at the end point of the converter is less than or equal to 0.040 wt%, directly tapping;
under the condition that the end point carbon content of the converter is more than 0.030 wt% and less than 0.050 wt%: when the oxygen content at the end point of the converter is equal to 0.060 wt%, controlling the time of bottom blowing argon gas to be 2-3min and controlling the flow of the bottom blowing argon gas to be 600-3H; when the range of the terminal oxygen content of the converter is more than 0.040 wt% and less than 0.060 wt%, controlling the bottom blowing argon gas time to be 1-2min and controlling the bottom blowing argon gas flow to be more than 400m3H is less than 600m3H; when the oxygen content at the end point of the converter is less than or equal to 0.040 wt%, directly tapping;
under the condition that the end point carbon content of the converter is less than or equal to 0.030 wt%: when the terminal oxygen content of the converter is equal to 0.070 wt%, controlling the time of bottom blowing argon gas to be 1-2min and controlling the flow of the bottom blowing argon gas to be 600-3H; when the range of the terminal oxygen content of the converter is more than 0.050 wt% and less than 0.070 wt%, controlling the bottom blowing argon gas time to be 1-2min, and controlling the bottom blowing argon gas flow to be more than 400m3H is less than 600m3H; and when the oxygen content at the end point of the converter is less than or equal to 0.050 wt%, directly tapping.
2. The method of promoting the equilibrium of the reaction in a converter according to claim 1, wherein the tapping is carried out in a slag-stopping tapping mode.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810464726.9A CN108570529B (en) | 2018-05-15 | 2018-05-15 | Method for promoting reaction balance of converter |
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| CN201810464726.9A CN108570529B (en) | 2018-05-15 | 2018-05-15 | Method for promoting reaction balance of converter |
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| CN108570529B true CN108570529B (en) | 2020-10-30 |
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| CN109825664A (en) * | 2019-04-12 | 2019-05-31 | 攀钢集团攀枝花钢铁研究院有限公司 | The method for reducing converter terminal molten steel carbon oxygen product |
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| CN103266196B (en) * | 2013-05-15 | 2014-10-08 | 武汉钢铁(集团)公司 | Method for producing carbon steel by using low-temperature low-silicon molten iron in 90-ton converter |
| CN104004877B (en) * | 2014-06-06 | 2016-06-01 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of method reducing converter terminal carbon oxygen and amassing |
| CN104404197B (en) * | 2014-12-04 | 2016-08-24 | 北京首钢股份有限公司 | The method reducing steel-making link molten steel nitrogen |
| CN107099639B (en) * | 2017-04-06 | 2019-09-03 | 首钢集团有限公司 | A kind of smelting process of top and bottom combined blown converter |
| CN107099640B (en) * | 2017-04-10 | 2019-04-23 | 首钢集团有限公司 | A kind of top and bottom combined blown converter and bottom blowing method |
| CN107447070A (en) * | 2017-07-30 | 2017-12-08 | 湖南华菱湘潭钢铁有限公司 | A kind of Aluminum steel converter smelting method |
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