CN111471831A - Ternary refining slag for high-carbon stranded wire steel, high-carbon stranded wire steel and slagging method thereof - Google Patents
Ternary refining slag for high-carbon stranded wire steel, high-carbon stranded wire steel and slagging method thereof Download PDFInfo
- Publication number
- CN111471831A CN111471831A CN202010419237.9A CN202010419237A CN111471831A CN 111471831 A CN111471831 A CN 111471831A CN 202010419237 A CN202010419237 A CN 202010419237A CN 111471831 A CN111471831 A CN 111471831A
- Authority
- CN
- China
- Prior art keywords
- stranded wire
- carbon
- slag
- wire steel
- steel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- 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
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- 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
- C21C7/064—Dephosphorising; Desulfurising
- C21C7/0645—Agents used for dephosphorising or desulfurising
-
- 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 high-carbon stranded wire steel ternary refining slag, high-carbon stranded wire steel and a slagging method thereof, wherein the high-carbon stranded wire steel ternary refining slag comprises the following components in percentage by weight of 45-50: 8-10: 20-25 of CaO, MgO and SiO2The invention also provides a slagging method of the high-carbon stranded wire steel, which comprises the steps of 1) deoxidizing by adopting silicon-calcium-barium in the converter tapping process, adding lime and fluorite for slag washing, 2) slagging by using the lime and the fluorite and rapidly desulfurizing by using calcium carbide in the early stage of L F refining, and 3) preparing white slag by using the ternary refining slag of the high-carbon stranded wire steel, wherein the ternary refining slag of the high-carbon stranded wire steel can improve the desulfurization effect of the high-carbon steel and reduce the content of brittle inclusions, and the slagging method can ensure that the prepared high-carbon stranded wire steel has excellent fracture resistance, and is convenient to operate and comprises the stepsSimplicity and low cost.
Description
Technical Field
The invention relates to high-carbon stranded wire steel, in particular to ternary refining slag of the high-carbon stranded wire steel, the high-carbon stranded wire steel and a slagging method thereof.
Background
The prestressed steel strand produced by the high-carbon steel wire rod is widely applied to the fields of buildings, water conservancy, energy, ocean engineering and the like. The wire rod not only has the performances of high strength, high toughness, low relaxation, corrosion resistance and the like, but also has higher added value. When the stranded wire is manufactured, the stranded wire is continuously drawn to phi 5.02-5.07 mm at the speed of 3-8 m/s, and the total compression ratio reaches more than 80%, so that the steel quality and the processing performance are highly required.
In order to meet the process quality of the drawing process and the performance requirements of final products, the cleanliness of molten steel in the smelting process must be improved, and inclusions such as FeS, MnS and the like in the steel are reduced. At present, CaO-Al2O3-SiO2The slag system is widely applied to the refining process of high-carbon steel, has poor desulfurization effect and high content of brittle inclusions, is easy to cause drawing fracture, and seriously affects the product quality.
Disclosure of Invention
The invention aims to provide high-carbon stranded wire steel ternary refining slag, high-carbon stranded wire steel and a slagging method thereof, wherein the high-carbon stranded wire steel ternary refining slag can improve the desulfurization effect of the high-carbon steel and reduce the content of brittle inclusions; the slagging method can enable the prepared high-carbon stranded wire steel to have excellent fracture resistance, and meanwhile, the slagging method has the advantages of convenience in operation, simplicity in steps and low cost.
In order to achieve the purpose, the invention provides high-carbon stranded wire steel ternary refining slag which comprises the following components in percentage by weight of 45-50: 8-10: 20-25 of CaO, MgO and SiO2。
The invention also provides a slagging method of the high-carbon stranded wire steel, which comprises the following steps:
1) in the converter tapping process, silicon, calcium and barium are adopted for deoxidation, and lime and fluorite are added for slag washing;
2) in the early stage of L F refining, lime and fluorite are used for slagging, and calcium carbide is used for rapid desulfurization;
3) and (3) using the high-carbon stranded wire steel ternary refining slag to produce white slag.
The invention further provides the high-carbon stranded wire steel prepared by the slagging method.
In the above technical solution, the present invention provides, on the one hand, a composition comprising CaO, MgO, and SiO2The ternary refining slag of the high-carbon stranded wire steel of the ternary slag system can improve the desulfurization effect of high-carbon steel and reduce the content of brittle inclusions. On the other hand, silicon, calcium and barium are adopted for deoxidation, lime and fluorite are added for slag washing, and aluminum-containing deoxidation and slagging materials are not used; slagging by using lime and fluorite, and quickly desulfurizing by using calcium carbide; finally, using the high-carbon stranded wire steel ternary refining slag to make white slag; the slagging method can enable the prepared high-carbon stranded wire steel to have excellent fracture resistance, and meanwhile, the slagging method has the advantages of convenience in operation, simplicity in steps and low cost.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Detailed Description
The following describes in detail specific embodiments of the present invention. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For ranges of values, between the endpoints of each of the ranges and the individual points, and between the individual points may be combined with each other to give one or more new ranges of values, and these ranges of values should be considered as specifically disclosed herein.
The invention provides a high-carbon stranded wire steel ternary refining slag, which comprises the following components in percentage by weight of 45-50: 8-10: 20-25 of CaO, MgO and SiO2。
In the ternary refining slag for high-carbon stranded wire steel, in order to further improve the desulfurization effect of high-carbon steel and reduce the content of brittle inclusions, the alkalinity of the binary slag system is preferably 1.8-2.2.
The invention also provides a slagging method of the high-carbon stranded wire steel, which comprises the following steps:
1) in the converter tapping process, silicon, calcium and barium are adopted for deoxidation, and lime and fluorite are added for slag washing;
2) in the early stage of L F refining, lime and fluorite are used for slagging, and calcium carbide is used for rapid desulfurization;
3) and (3) using the high-carbon stranded wire steel ternary refining slag to produce white slag.
In step 1) of the above-described slagging method, in order to further improve the deoxidation effect, it is preferable that the amount of Si, Ca and Ba used in step 1) is 150-180kg per 120t of molten steel.
In step 1) of the above-described slagging method, in order to further improve the slag washing effect, it is preferable that the amount of the white ash is 150-300kg and the amount of the fluorite is 90-110kg, relative to 120t of the molten steel in step 1).
In step 2) of the above-described slagging method, in order to further improve the slagging effect, it is preferable that in step 2), the amount of white ash is 300-500kg and the amount of fluorite is 150-200kg, relative to 120t of molten steel.
In step 2) of the above-described slagging method, in order to further improve the desulfurization effect, it is preferable that the amount of calcium carbide used in step 2) is 90 to 110kg per 120t of molten steel.
In step 2) of the above slagging method, in order to reduce the content of brittle inclusions in the finished steel, it is preferable that in step 3), the amount of the ternary refining slag for high carbon stranded steel is 480-500kg relative to 120t of molten steel.
In step 2) of the above-mentioned slagging method, in order to reduce the content of brittle inclusions in the finished steel, it is preferable that in step 3), the white slag holding time is 15 to 20min and the soft blowing time is 10 to 15 min.
The invention further provides the high-carbon stranded wire steel prepared by the slagging method.
The present invention will be described in detail below by way of examples.
Example 1
1) 160kg of silicon, calcium and barium are adopted for deoxidation in the process of tapping 120t of molten steel by a converter, and 200kg of lime and 100kg of fluorite are added for slag washing;
2) in the early stage of L F refining, 400kg of lime and 180kg of fluorite are used for slagging, and 100kg of calcium carbide is used for rapid desulfurization;
3) 490kg of high carbon stranded wire steel ternary refining slag is used for manufacturing white slag.
Wherein the high-carbon stranded wire steel ternary refining slag contains the following components in percentage by weight: 9: CaO, MgO and SiO of 232The alkalinity of the binary slag system is 2.0.
Example 2
1) In the process of tapping 120t of molten steel by a converter, 150kg of silicon, calcium and barium are adopted for deoxidation, and 150kg of lime and 110kg of fluorite are added for slag washing;
2) in the early stage of L F refining, 300kg of lime and 200kg of fluorite are used for slagging, and 110kg of calcium carbide is used for rapid desulfurization;
3) 480kg of high-carbon stranded wire steel ternary refining slag is used for manufacturing white slag.
Wherein the high-carbon stranded wire steel ternary refining slag contains the following components in percentage by weight of 45: 10: 25 of CaO, MgO and SiO2The alkalinity of the binary slag system is 1.8.
Example 3
1) In the process of tapping 120t of molten steel by a converter, 180kg of silicon, calcium and barium are adopted for deoxidation, and 300kg of lime and 90kg of fluorite are added for slag washing;
2) in the early stage of L F refining, 500kg of lime and 150kg of fluorite are used for slagging, and 90kg of calcium carbide is used for rapid desulfurization;
3) and (3) using 500kg of high-carbon stranded wire steel ternary refining slag to produce white slag.
Wherein the ternary refining slag for the high-carbon stranded wire steel contains the following components in percentage by weight of 50: 8: 20 of CaO, MgO and SiO2The alkalinity of the binary slag system is 2.2.
Comparative example 1
The process is carried out as in example 1, except that the three-element refining slag CaO-Al of the high-carbon stranded wire steel is2O3-SiO2The slag system is changed into CaO-MgO-SiO2Slag system of CaO, MgO, SiO2The weight ratio of (A) to (B) is 48: 9: 23.
detection example 1
The reduction of area of the high carbon strand steel obtained by casting the cast slab after slagging in the examples and comparative examples was measured by the method described in GB/T228.1-2010, and the results are shown in Table 1.
TABLE 1
| Example 1 | Example 2 | Example 3 | Comparative example 1 | |
| Reduction of area/%) | 35 | 32 | 34 | 30 |
The preferred embodiments of the present invention have been described in detail, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (10)
1. The ternary refining slag system for the high-carbon stranded wire steel is characterized by comprising the following components in parts by weight of 45-50: 8-10: 20-25 of CaO, MgO and SiO2。
2. The ternary refining slag for high-carbon stranded wire steel as claimed in claim 1, wherein the basicity of the binary slag system is 1.8-2.2.
3. A slagging method of high-carbon stranded wire steel, wherein the slagging method comprises the following steps:
1) in the converter tapping process, silicon, calcium and barium are adopted for deoxidation, and lime and fluorite are added for slag washing;
2) in the early stage of L F refining, lime and fluorite are used for slagging, and calcium carbide is used for rapid desulfurization;
3) the white slag is manufactured by using the ternary refining slag of the high-carbon stranded wire steel as claimed in claim 1 or 2.
4. The slagging method according to claim 3, wherein in step 1), the amount of Si, Ca and Ba is 150-180kg relative to 120t of molten steel.
5. The slagging method according to claim 3, wherein in step 1), the amount of the white ash is 150-300kg and the amount of the fluorite is 90-110kg, relative to 120t of molten steel.
6. The slagging method according to claim 3, wherein in the step 2), the amount of the white ash is 500kg at 300 t and the amount of the fluorite is 200kg at 150 t relative to the molten steel at 120 t.
7. The slagging method according to claim 3, wherein in the step 2), the dosage of the calcium carbide is 90-110kg relative to 120t of molten steel.
8. The slagging method according to claim 3, wherein in step 3), the amount of the ternary refining slag of high carbon stranded steel is 480-500kg relative to 120t of molten steel.
9. The slag-making method according to claim 3, wherein in the step 3), the white slag holding time is 15-20min, and the soft blowing time is 10-15 min.
10. The high carbon stranded wire steel manufactured by the slagging method according to any one of claims 3 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010419237.9A CN111471831A (en) | 2020-05-18 | 2020-05-18 | Ternary refining slag for high-carbon stranded wire steel, high-carbon stranded wire steel and slagging method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010419237.9A CN111471831A (en) | 2020-05-18 | 2020-05-18 | Ternary refining slag for high-carbon stranded wire steel, high-carbon stranded wire steel and slagging method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111471831A true CN111471831A (en) | 2020-07-31 |
Family
ID=71760043
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010419237.9A Pending CN111471831A (en) | 2020-05-18 | 2020-05-18 | Ternary refining slag for high-carbon stranded wire steel, high-carbon stranded wire steel and slagging method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111471831A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102031447A (en) * | 2009-09-30 | 2011-04-27 | 鞍钢股份有限公司 | Boron-containing high carbon steel wire rod for manufacturing wires and production method thereof |
| CN102211159A (en) * | 2011-05-06 | 2011-10-12 | 攀钢集团有限公司 | Production method of steel for 82 B steel stranded wires |
| CN103014220A (en) * | 2012-12-26 | 2013-04-03 | 安阳钢铁股份有限公司 | Method for controlling impurities in high-carbon steel |
| CN104498805A (en) * | 2014-12-29 | 2015-04-08 | 首钢总公司 | Production method of high-carbon low-nitrogen steel for strand wires |
| CN106222362A (en) * | 2016-07-22 | 2016-12-14 | 武汉钢铁股份有限公司 | A kind of method of refining of spring steel |
| CN111041368A (en) * | 2019-12-26 | 2020-04-21 | 芜湖新兴铸管有限责任公司 | High-performance 82B wire rod steel and production method thereof |
-
2020
- 2020-05-18 CN CN202010419237.9A patent/CN111471831A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102031447A (en) * | 2009-09-30 | 2011-04-27 | 鞍钢股份有限公司 | Boron-containing high carbon steel wire rod for manufacturing wires and production method thereof |
| CN102211159A (en) * | 2011-05-06 | 2011-10-12 | 攀钢集团有限公司 | Production method of steel for 82 B steel stranded wires |
| CN103014220A (en) * | 2012-12-26 | 2013-04-03 | 安阳钢铁股份有限公司 | Method for controlling impurities in high-carbon steel |
| CN104498805A (en) * | 2014-12-29 | 2015-04-08 | 首钢总公司 | Production method of high-carbon low-nitrogen steel for strand wires |
| CN106222362A (en) * | 2016-07-22 | 2016-12-14 | 武汉钢铁股份有限公司 | A kind of method of refining of spring steel |
| CN111041368A (en) * | 2019-12-26 | 2020-04-21 | 芜湖新兴铸管有限责任公司 | High-performance 82B wire rod steel and production method thereof |
Non-Patent Citations (4)
| Title |
|---|
| 俞海明 等: "《转炉钢水的炉外精炼技术》", 31 August 2011, 冶金工业出版社 * |
| 俞海明: "《电炉钢水的炉外精炼技术》", 31 August 2010, 冶金工业出版社 * |
| 刘立德 等: "SWRH82B钢Φ14-15mm盘条的生产实践", 《特殊钢》 * |
| 王文培 等: "高碳绞线钢SWRH82B中心碳偏析控制实践", 《特殊钢》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109252097B (en) | Non-quenched and tempered steel of high-strength expansion-fracture connecting rod and continuous casting production process thereof | |
| CN101492758B (en) | Method for controlling non-metallic inclusion in pipeline steel | |
| CN109136466A (en) | The method for making steel of sulfur-bearing Aluminum steel | |
| CN113088797B (en) | Shallow treatment process suitable for SPHC low-carbon series steel grades | |
| CN103834848A (en) | Steel for boron-containing prestressed steel wires and steel strands and smelting process thereof | |
| CN110863144B (en) | High-strength steel for oil and gas exploitation fracturing pump and manufacturing method thereof | |
| CN110359007B (en) | Heat treatment method of 20MnTiB fastener | |
| CN114410890A (en) | Slagging process of extremely-low-aluminum railway rail steel | |
| CN111471831A (en) | Ternary refining slag for high-carbon stranded wire steel, high-carbon stranded wire steel and slagging method thereof | |
| CN104060047B (en) | A kind of method of refining of the molten steel for the production of bearing steel | |
| CN113897544B (en) | Wire rod for rare earth high-strength high-toughness prestressed steel strand and smelting and rolling production method thereof | |
| CN106011379B (en) | The method of deoxidation of cold-forging steel | |
| CN101935804B (en) | Seamless steel tube of 135 ksi steel grade for high-tenacity drill rod | |
| CN111961805B (en) | High manganese steel liquid purification method, product and application | |
| EP3674424B1 (en) | Smelting method for ultra-low carbon 13cr stainless steel | |
| CN112593036A (en) | Low-silicon microalloyed high-temperature carburized gear steel and manufacturing method thereof | |
| CN108823506A (en) | A kind of tensile strength >=1000MPa cored steel and production method | |
| US11674192B2 (en) | Method of making steel by deeply dephosphorization in hot metal tank and decarburization using semi-steel with nearly zero phosphorus load in converter | |
| CN114807510B (en) | Method for controlling rephosphorization in converter smelting high-ferrotitanium tapping process | |
| CN113802059B (en) | Steel for large-span high-strength cable core and preparation method thereof | |
| CN114959176B (en) | Composite pellet for purifying molten steel and method for purifying molten steel | |
| Dongchu et al. | Research on the Production Practice of 09CuPCrNi Weather Resistant Steel | |
| KR950012418B1 (en) | Making method of low hydrogen clean steel | |
| CN101353714A (en) | Aluminum-free deoxidizing agent | |
| CN117187687A (en) | High-performance steel for bolts and production method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200731 |
|
| RJ01 | Rejection of invention patent application after publication |