CN108265148A - A kind of method for making steel - Google Patents
A kind of method for making steel Download PDFInfo
- Publication number
- CN108265148A CN108265148A CN201810007140.XA CN201810007140A CN108265148A CN 108265148 A CN108265148 A CN 108265148A CN 201810007140 A CN201810007140 A CN 201810007140A CN 108265148 A CN108265148 A CN 108265148A
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- China
- Prior art keywords
- steel
- slag
- equal
- slag steel
- converter
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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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The present invention relates to steelmaking technical field more particularly to a kind of method for making steel, the method includes：It is made steel using slag steel as cooling slag former；Wherein, the diameter range of the slag steel is 10mm~40mm, and in the slag steel, TFe is greater than or equal to 60%, and the moisture content of the slag steel is less than or equal to 2%.The application replaces pelletizing of the prior art and cold burden to be made steel as cooling slag former using slag steel, slag steel plays the role of cooling agent and slag former simultaneously, in this application, the diameter range for requiring slag steel simultaneously is 10mm~40mm, TFe is greater than or equal to 60% in slag steel, the moisture content of slag steel is less than or equal to 2%, it is made steel by using the slag steel with above-mentioned condition as cooling slag former, it realizes the recycling to slag steel and efficiently uses, it also is able to reduce pneumatic steelmaking production cost simultaneously and reduces environmental pollution, in addition, it also is able to make the process of bessemerizing steady, also improve slugging speed simultaneously.
Description
Technical field
The present invention relates to steelmaking technical field more particularly to a kind of method for making steel.
Background technology
Steel industry is that ferrous metal mineral pick up and ferrous metal smelting processing etc. is based on industrial production activities to be engaged in
Industrial trade, mineral including metallic iron, chromium, manganese etc. pick up industry, ironmaking industry, steel, steel processing industry, ferroalloy smelting
The segmented industries such as industry, steel wire and its product industry.
At present, it under the pressure of the environmentally protective needs of steel industry, rationally recycles and imperative using slag steel, therefore, how
Slag steel is recycled and the problem of using as urgent need to resolve.
Invention content
In view of the above problems, it is proposed that the present invention overcomes the above problem in order to provide one kind or solves at least partly
State the method for making steel of problem.
The embodiment of the present invention provides a kind of method for making steel, the method includes：
It is made steel using slag steel as cooling slag former；
Wherein, the diameter range of the slag steel is 10mm~40mm, and in the slag steel, TFe is greater than or equal to 60%, institute
The moisture content for stating slag steel is less than or equal to 2%.
Preferably, it is described to be made steel using slag steel as cooling slag former, including：
Upper storehouse is carried out using material of the slag steel as converter feed bin；
The slag steel is added in into converter.
Preferably, during upper storehouse is carried out as the material of converter feed bin using the slag steel, upper storehouse frequency is every
Day is less than or equal to 3 times, and each upper storehouse amount is less than or equal to 20t.
Preferably, during the slag steel is added in into converter, the addition opportunity of the slag steel is：When the converter
It opens and the 70% of default slag steel addition is added in when blowing, the default slag steel is added in when the 28%~35% of blowing to total oxygen-supplying amount
The 30% of addition.
Preferably, during the slag steel is added in into converter, blowing mid-term, the slag steel added in every time
Amount is less than 300kg, and, it controls and adds in the slag steel before the oxygen-supplying amount of the converter is the 70% of total oxygen-supplying amount.
Preferably, during being made steel using slag steel as slag former, the quality hundred of sulphur in steel grade to be refined
Divide content more than 0.0040% and the mass percentage of phosphorus is greater than or equal to 0.01O%.
Preferably, the tapping temperature of the steel grade is less than or equal to 1685 DEG C.
One or more of embodiment of the present invention technical solution, has at least the following technical effects or advantages：
The application replaces pelletizing of the prior art and cold burden to be made steel as cooling slag former using slag steel, and slag steel is same
When play the role of cooling agent and slag former, in this application, while require the diameter range of slag steel as 10mm~40mm, slag steel
Middle TFe is greater than or equal to 60%, and the moisture content of slag steel is less than or equal to 2%, by using the slag steel with above-mentioned condition as cold
But slag former is made steel, and is realized the recycling to slag steel and is efficiently used, while also is able to reduce pneumatic steelmaking production cost
And reduce environmental pollution, in addition it is possible to make the process of bessemerizing steady, while also improve slugging speed.
Specific embodiment
The exemplary embodiment of the disclosure is described in more detail below, these embodiments are provided and are to be able to more thoroughly
Ground understands the disclosure, and can the scope of the present disclosure be completely communicated to those skilled in the art.
The embodiment of the present invention provides a kind of method for making steel, the method includes：
It is made steel using slag steel as cooling slag former, wherein, the diameter range of slag steel is 10mm~40mm, in slag steel
In, TFe is greater than or equal to 60%, and the moisture content of slag steel is less than or equal to 2%.
Specifically, the application replaces pelletizing of the prior art and cold burden to be refined as cooling slag former using slag steel
Steel, slag steel play the role of cooling agent and slag former simultaneously, in this application, while require the diameter range of slag steel for 10mm~
40mm, TFe is greater than or equal to 60% in slag steel, and the moisture content of slag steel is less than or equal to 2%, by using the slag with above-mentioned condition
Steel is made steel as cooling slag former, is realized the recycling to slag steel and is efficiently used, while also is able to reduce pneumatic steelmaking
Production cost and reduce environmental pollution, in addition it is possible to make the process of bessemerizing steady, while also improve slugging speed
Degree.
Further, in specific implementation process, during recycling and utilizing slag steel, first to vessel slag and splash slag
It has bad luck to fixed-end forces station, through the multiple broken slag steel of slag production line, first alerted roll screen sorting, selecting diameter range is
The slag steel of 10mm~40mm, then by magnetic separation and roll screen, the TFe of slag steel is controlled in the range of more than or equal to 60%, with
The quantity of slag that process slag steel band enters is bessemerized in reduction, meanwhile, control slag molten steel part is also needed in the range of less than or equal to 2%,
To prevent slag steel from fluffy material or sizing occurs in dicang or converter high hopper, cause feed bin blocking can not blanking.
Further, it is made steel using slag steel as cooling slag former, including：
Upper storehouse is carried out using material of the slag steel as converter feed bin；
Slag steel is added in into converter.
Further, the slag steel of upper storehouse is stored for a long time in feed bin in order to prevent, and during upper storehouse, upper storehouse frequency is every
Day is less than or equal to 3 times, and each upper storehouse amount is less than or equal to 20t.
In addition, during slag steel is added in into converter, the addition opportunity of slag steel is：When converter, which is opened, blows, add in pre-
If the 70% of slag steel addition, when the 28%~35% of blowing to total oxygen-supplying amount, add in the 30% of default slag steel addition.Its
In, default slag steel addition is calculated according to sublance model, wherein, sublance model can be according to molten iron condition, steel scrap situation
Default slag steel addition is calculated with smelting endpoint temperature conditions.For the converter of 210t, corresponding default slag steel adds in
It measures as 6t.
Meanwhile during slag steel is added in into converter, in blowing mid-term, the amount for adding in slag steel every time is less than 300kg,
And it controls and adds in slag steel before the oxygen-supplying amount of converter is the 70% of total oxygen-supplying amount.When the oxygen-supplying amount of converter is more than total oxygen-supplying amount
70% after, do not allow add in slag steel.
In this application, it in order to reduce influence of the slag steel to special steel grade, is refined using slag steel as cooling slag former
The steel grade to be refined of steel, needs to meet：The mass percentage of sulphur is more than the matter of 0.0040% and phosphorus in steel grade to be refined
It measures percentage composition and is greater than or equal to 0.010%, in addition, the tapping temperature of steel grade to be refined is less than or equal to 1685 DEG C.
One or more of embodiment of the present invention technical solution, has at least the following technical effects or advantages：
The application replaces pelletizing of the prior art and cold burden to be made steel as cooling slag former using slag steel, and slag steel is same
When play the role of cooling agent and slag former, in this application, while require the diameter range of slag steel as 10mm~40mm, slag steel
Middle TFe is greater than or equal to 60%, and the moisture content of slag steel is less than or equal to 2%, by using the slag steel with above-mentioned condition as cold
But slag former is made steel, and is realized the recycling to slag steel and is efficiently used, while also is able to reduce pneumatic steelmaking production cost
And reduce environmental pollution, in addition it is possible to make the process of bessemerizing steady, while also improve slugging speed.
Although preferred embodiments of the present invention have been described, but those skilled in the art once know basic creation
Property concept, then additional changes and modifications may be made to these embodiments.So appended claims be intended to be construed to include it is excellent
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
God and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (7)
1. a kind of method for making steel, which is characterized in that the method includes：
It is made steel using slag steel as cooling slag former；
Wherein, the diameter range of the slag steel is 10mm~40mm, and in the slag steel, TFe is greater than or equal to 60%, the slag
The moisture content of steel is less than or equal to 2%.
2. the method as described in claim 1, which is characterized in that it is described to be made steel using slag steel as cooling slag former, it wraps
It includes：
Upper storehouse is carried out using material of the slag steel as converter feed bin；
The slag steel is added in into converter.
3. method as claimed in claim 2, which is characterized in that carried out using the slag steel as the material of converter feed bin
During storehouse, upper storehouse frequency is less than or equal to 3 times to be daily, and each upper storehouse amount is less than or equal to 20t.
4. method as claimed in claim 2, which is characterized in that during the slag steel is added in into converter, the slag
The addition opportunity of steel is：The 70% of default slag steel addition is added in when the converter, which is opened, blows, when blowing to total oxygen-supplying amount
The 30% of the default slag steel addition is added in when 28%~35%.
5. method as claimed in claim 2, which is characterized in that during the slag steel is added in into converter, blowing
Mid-term, the amount of the slag steel added in every time are less than 300kg, and, the oxygen-supplying amount controlled in the converter is total oxygen-supplying amount
The slag steel is added in before 70%.
6. the method as described in claim 1, which is characterized in that during being made steel using slag steel as slag former,
The mass percentage of sulphur is more than 0.0040% in steel grade to be refined and the mass percentage of phosphorus is greater than or equal to
0.010%.
7. method as claimed in claim 6, which is characterized in that the tapping temperature of the steel grade is less than or equal to 1685 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810007140.XA CN108265148B (en) | 2018-01-03 | 2018-01-03 | Steelmaking method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810007140.XA CN108265148B (en) | 2018-01-03 | 2018-01-03 | Steelmaking method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108265148A true CN108265148A (en) | 2018-07-10 |
| CN108265148B CN108265148B (en) | 2020-02-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810007140.XA Active CN108265148B (en) | 2018-01-03 | 2018-01-03 | Steelmaking method |
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| CN (1) | CN108265148B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001192720A (en) * | 1999-10-26 | 2001-07-17 | Nippon Steel Corp | Converter steel making process |
| CN102586538A (en) * | 2012-02-20 | 2012-07-18 | 攀钢集团攀枝花钢铁研究院有限公司 | Vanadium extraction coolant and preparation method thereof |
| CN104694696A (en) * | 2013-12-04 | 2015-06-10 | 铜陵市永生机电制造有限责任公司 | Coolant |
| CN106381351A (en) * | 2016-08-31 | 2017-02-08 | 云南德胜钢铁有限公司 | Waste slag steel recycling method |
-
2018
- 2018-01-03 CN CN201810007140.XA patent/CN108265148B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001192720A (en) * | 1999-10-26 | 2001-07-17 | Nippon Steel Corp | Converter steel making process |
| CN102586538A (en) * | 2012-02-20 | 2012-07-18 | 攀钢集团攀枝花钢铁研究院有限公司 | Vanadium extraction coolant and preparation method thereof |
| CN104694696A (en) * | 2013-12-04 | 2015-06-10 | 铜陵市永生机电制造有限责任公司 | Coolant |
| CN106381351A (en) * | 2016-08-31 | 2017-02-08 | 云南德胜钢铁有限公司 | Waste slag steel recycling method |
Non-Patent Citations (1)
| Title |
|---|
| 赵长亮 等: ""转炉预脱磷与‘全三脱’铁水少渣冶炼技术"", 《钢铁》 * |
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| Publication number | Publication date |
|---|---|
| CN108265148B (en) | 2020-02-04 |
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Effective date of registration: 20220602 Address after: 025 Zhao'an street, Qian'an Economic Development Zone, Tangshan City, Hebei Province 064400 Patentee after: QIAN'AN IRON AND STEEL COMPANY OF SHOUGANG Corp. Patentee after: Beijing Shougang co., ltd Address before: 100041 No. 68, Shijingshan Road, Beijing, Shijingshan District Patentee before: BEIJING SHOUGANG Co.,Ltd. |