CN112342339A - Carbon deoxidation process for SWRY11-Cr series steel - Google Patents
Carbon deoxidation process for SWRY11-Cr series steel Download PDFInfo
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- CN112342339A CN112342339A CN202011116830.2A CN202011116830A CN112342339A CN 112342339 A CN112342339 A CN 112342339A CN 202011116830 A CN202011116830 A CN 202011116830A CN 112342339 A CN112342339 A CN 112342339A
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- carbon
- converter
- steel
- molten steel
- swry11
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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
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/06—Deoxidising, e.g. killing
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention relates to the technical field of metallurgy, in particular to a SWRY11-Cr series steel grade carbon deoxidation process, wherein a converter is used for properly increasing the end temperature, ensuring the argon blowing time, pre-deoxidizing by utilizing molten steel carbon in the tapping process, alloying according to residual oxygen and controlling the oxygen content in a target range. The invention utilizes the end point carbon of the converter to carry out the primary deoxidation, so the control of the end point carbon oxygen content of the converter is the key, and the key of stable molten steel pouring and stable process components is also provided. The process starts with the reduction of the addition of the deoxidizer on the whole, effectively saves the consumption of the deoxidizer, obviously reduces the quantity of Al2O3 in steel, obviously reduces process accidents such as flocculation flow, burning and the like, reduces the production cost and improves the cleanliness of molten steel. Meanwhile, the decarbonization burden of the converter can be reduced by properly improving the end point carbon content of the converter, the converter maintenance is reduced, and the refractory maintenance cost is saved.
Description
Technical Field
The invention relates to the technical field of metallurgy, in particular to a carbon deoxidation process for SWRY11-Cr series steel.
Background
The traditional SWRY11-Cr series steel LF furnace has long treatment period, carburetion in the treatment process, low carbon pulling at the converter end point for ensuring the carbon component requirement, oxygen requirement more than 800ppm, high end point oxygen content, more deoxidation products, low molten steel cleanliness, poor continuous casting castability and high cost.
By adopting the carbon deoxidation process, the converter can properly improve the end point carbon content, the converter can pre-deoxidize by utilizing the carbon tapped from the converter, and the control of the end point carbon oxygen content by the converter is the key, and is also the key of stable pouring of molten steel and stable process components. In the prior art, the converter has high final oxygen content and increased aluminum involved amount, the generated Al2O3 is increased, the single argon blowing process is difficult to completely remove, process accidents such as flocculation flow, burning, robbing and the like of a subsequent pouring nozzle are easily caused, the production rhythm organization and the product quality are greatly influenced, and the production cost is obviously improved due to the increase of the addition amount of the deoxidizer.
Disclosure of Invention
In order to solve the technical problem, the invention discloses a carbon deoxidation process for SWRY11-Cr series steel.
The specific technical scheme is as follows:
a SWRY11-Cr series steel grade carbon deoxidation process, wherein a converter properly increases the end point temperature, ensures argon blowing time, pre-deoxidizes by molten steel carbon in the tapping process, performs alloying according to residual oxygen and controls the oxygen amount in a target range; the argon station argon blowing and deoxidation operation requirements are as follows:
(1) after molten steel arrives at a station, opening argon gas for blowing for 3min, ensuring that molten slag on the liquid level of a steel ladle is completely blown open, fully blowing argon, ensuring the argon blowing effect, and promoting carbon-oxygen reaction in the molten steel so as to reduce the carbon content;
(2) and deoxidation alloying is not carried out in the tapping process, so that the reaction of carbon and oxygen is ensured.
The standard components of the SWRY11-Cr series steel grade are as follows: c is not more than 0.090%, Si is 0.030%, Mn: 0.35-0.65%, P is less than or equal to 0.020%, and S is less than or equal to 0.023%.
Compared with the prior art, the invention has the following beneficial technical effects:
the invention utilizes the end point carbon of the converter to carry out the primary deoxidation, so the control of the end point carbon oxygen content of the converter is the key, and the key of stable molten steel pouring and stable process components is also provided. The process starts with the reduction of the addition of the deoxidizer on the whole, theoretically, the oxygen content of 133ppm can be removed by 0.01 percent of carbon, and the generated CO has no residue in the molten steel, thereby not only reducing the consumption of the deoxidizer, but also reducing the Al2O3The production amount of the deoxidizer is effectively saved, and the Al in the steel is obviously reduced2O3The quantity of the molten steel is reduced, the process accidents such as flocculation flow, burning and robbing are obviously reduced, the production cost is reduced, and the cleanliness of the molten steel is improved. At the same time, suitably liftThe high converter end point carbon content can also reduce the converter decarburization burden, reduce the converter maintenance and save the refractory maintenance cost.
Detailed Description
The present invention is further illustrated by the following examples, but the scope of the present invention is not limited to these examples.
A SWRY11-Cr series steel grade carbon deoxidation process, wherein a converter properly increases the end point temperature, ensures argon blowing time, pre-deoxidizes by molten steel carbon in the tapping process, performs alloying according to residual oxygen and controls the oxygen amount in a target range; the argon station argon blowing and deoxidation operation requirements are as follows:
(1) after molten steel arrives at a station, opening argon gas for blowing for 3min, ensuring that molten slag on the liquid level of a steel ladle is completely blown open, fully blowing argon, ensuring the argon blowing effect, and promoting carbon-oxygen reaction in the molten steel so as to reduce the carbon content;
(2) and deoxidation alloying is not carried out in the tapping process, so that the reaction of carbon and oxygen is ensured.
The standard components of the SWRY11-Cr series steel grade are as follows: c is not more than 0.090%, Si is 0.030%, Mn: 0.35-0.65%, P is less than or equal to 0.020%, and S is less than or equal to 0.023%.
The invention can remove 133ppm oxygen content by 0.01 percent of carbon theoretically, and the generated CO has no residue in molten steel, thereby not only reducing the consumption of the deoxidizer, but also reducing Al2O3The production amount of the deoxidizer is effectively saved, and the Al in the steel is obviously reduced2O3The quantity of the molten steel is reduced, the process accidents such as flocculation flow, burning and robbing are obviously reduced, the production cost is reduced, and the cleanliness of the molten steel is improved. Meanwhile, the decarbonization burden of the converter can be reduced by properly improving the end point carbon content of the converter, the converter maintenance is reduced, and the refractory maintenance cost is saved.
Claims (2)
1. A carbon deoxidation process for SWRY11-Cr series steel is characterized in that: the converter properly increases the end point temperature, ensures the argon blowing time, pre-deoxidizes by utilizing molten steel carbon in the tapping process, performs alloying according to residual oxygen and controls the oxygen content in a target range; the argon station argon blowing and deoxidation operation requirements are as follows:
(1) after molten steel arrives at a station, opening argon gas for blowing for 3min, ensuring that molten slag on the liquid level of a steel ladle is completely blown open, fully blowing argon, ensuring the argon blowing effect, and promoting carbon-oxygen reaction in the molten steel so as to reduce the carbon content;
(2) and deoxidation alloying is not carried out in the tapping process, so that the reaction of carbon and oxygen is ensured.
2. The SWRY11-Cr series steel grade carbon deoxidation process of claim 1, wherein: the standard components of the SWRY11-Cr series steel grade are as follows: c is not more than 0.090%, Si is 0.030%, Mn: 0.35-0.65%, P is less than or equal to 0.020%, and S is less than or equal to 0.023%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011116830.2A CN112342339A (en) | 2020-10-19 | 2020-10-19 | Carbon deoxidation process for SWRY11-Cr series steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011116830.2A CN112342339A (en) | 2020-10-19 | 2020-10-19 | Carbon deoxidation process for SWRY11-Cr series steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112342339A true CN112342339A (en) | 2021-02-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011116830.2A Pending CN112342339A (en) | 2020-10-19 | 2020-10-19 | Carbon deoxidation process for SWRY11-Cr series steel |
Country Status (1)
| Country | Link |
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| CN (1) | CN112342339A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103866074A (en) * | 2012-12-17 | 2014-06-18 | 天津天铁冶金集团有限公司 | Deoxidation advanced operation method by employing carbon |
| CN106702086A (en) * | 2017-01-22 | 2017-05-24 | 本钢板材股份有限公司 | SWRY11 type steel carbon deoxidation technology |
-
2020
- 2020-10-19 CN CN202011116830.2A patent/CN112342339A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103866074A (en) * | 2012-12-17 | 2014-06-18 | 天津天铁冶金集团有限公司 | Deoxidation advanced operation method by employing carbon |
| CN106702086A (en) * | 2017-01-22 | 2017-05-24 | 本钢板材股份有限公司 | SWRY11 type steel carbon deoxidation technology |
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Application publication date: 20210209 |