CN108977624A - Refining slag - Google Patents
Refining slag Download PDFInfo
- Publication number
- CN108977624A CN108977624A CN201811007938.0A CN201811007938A CN108977624A CN 108977624 A CN108977624 A CN 108977624A CN 201811007938 A CN201811007938 A CN 201811007938A CN 108977624 A CN108977624 A CN 108977624A
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- CN
- China
- Prior art keywords
- refining
- present
- molten steel
- refining slag
- sio
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- 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.)
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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
- C21C7/076—Use of slags or fluxes as treating agents
-
- 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 present invention provides a kind of refining slag, for the absorption of field trash in aluminium deoxidation molten steel, refining slag, by percentage to the quality, comprising: CaO 55%-60%, SiO28%-12%, Al2O332%-36%, MgO≤8%, FeO+MnO≤1.5%.According to the technical solution of the present invention, pass through the CaO-SiO of proportion optimizing2‑Al2O3Base slag system adsorbs field trash, can further decrease the inclusion content of refining link molten steel.
Description
Technical field
The present invention relates to metallurgical technology fields, in particular to a kind of refining slag.
Background technique
For field trash in steel product to the performance of product, there is adverse effect in especially mechanical property.Reduce steel inclusion
The always key points and difficulties of field of steel-making and scientific research personnel's important research direction.In general, being mingled in control molten steel
Object link includes coarse-fine refining, refining and tundish, and refining link is to reduce the key link of molten steel inclusion.Refining slag conduct
The important component for refining link, has the function of dross inclusion adsorption.Realize the optimization of refining slag dross inclusion adsorption, favorably
In the inclusion content for reducing molten steel.In production practice, CaO-SiO2-Al2O3Base slag system is widely used, to its
In terms of research is concentrated mainly on desulfurization.
Summary of the invention
The present invention is directed to solve at least one of the technical problems existing in the prior art or related technologies.
For this purpose, the object of the present invention is to provide a kind of refining slags.
In view of this, the technical solution of first aspect present invention provides a kind of refining slag, for pressing from both sides in aluminium deoxidation molten steel
The absorption of sundries, the refining slag, by percentage to the quality, comprising: CaO55%-60%, SiO28%-12%, Al2O332%-
36%, MgO≤8%, FeO+MnO≤1.5%.
Further, the molten steel temperature is 1500-1600 DEG C.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
The CaO-SiO of proportion through this embodiment2-Al2O3Base slag system adsorbs field trash, can further decrease
Refine the inclusion content of link molten steel.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Specific embodiment
In order to be more clearly understood that aforementioned aspect of the present invention, feature and advantage, With reference to embodiment
The present invention is further described in detail.It should be noted that in the absence of conflict, embodiments herein and reality
The feature applied in example can be combined with each other.
In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, still, the present invention may be used also
To be implemented using other than the one described here other modes, therefore, protection scope of the present invention is not by described below
Specific embodiment limitation.
The refining slag of embodiment according to the present invention, for the absorption of field trash in aluminium deoxidation molten steel, the refining slag, with
Mass percent meter, comprising: CaO 55%-60%, SiO28%-12%, Al2O332%-36%, MgO≤8%, FeO+MnO
≤ 1.5%.
Further, the molten steel temperature is 1500-1600 DEG C.
The CaO-SiO of proportion through this embodiment2-Al2O3Base slag system adsorbs field trash, can further decrease
Refine the inclusion content of link molten steel.
Specific embodiment
L245M pipe line steel is chosen as steel grade is implemented, the refining slag ingredient of LF is CaO content 45%-58% before optimizing,
SiO2Content is 8%-13%, Al2O3Content is 27%-38%, MgO≤8%, FeO+MnO≤1.5%.The refining of LF after optimization
Slag ingredient is CaO content 55%-60%, SiO2Content is 8%-12%, Al2O3Content is 32%-36%, MgO≤8%, FeO+
In the range of MnO≤1.5%.Optimization front and back LF [Alt]-[Als] < 0.002 ratio of offing normal in molten steel improves 11%, and [Als]/
[Alt] ratio promotes 3%.Optimization front and back concrete condition is shown in Table 1.
Situation before and after 1 Refining Slag Composition Optimizing of table
Technical solution of the present invention is explained above, according to the technical solution of the present invention, passes through the CaO- of proportion optimizing
SiO2-Al2O3Base slag system adsorbs field trash, can further decrease the inclusion content of refining link molten steel.
In the description of this specification, the description of term " one embodiment ", " some embodiments ", " specific embodiment " etc.
Mean that particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one reality of the invention
It applies in example or example.In the present specification, schematic expression of the above terms are not necessarily referring to identical embodiment or reality
Example.Moreover, description particular features, structures, materials, or characteristics can in any one or more of the embodiments or examples with
Suitable mode combines.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (2)
1. a kind of refining slag, the absorption for field trash in aluminium deoxidation molten steel, which is characterized in that the refining slag, with quality hundred
Divide than meter, comprising:
CaO 55%-60%, SiO28%-12%, Al2O332%-36%, MgO≤8%, FeO+MnO≤1.5%.
2. refining slag according to claim 1, which is characterized in that the molten steel temperature is 1500-1600 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811007938.0A CN108977624A (en) | 2018-08-31 | 2018-08-31 | Refining slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811007938.0A CN108977624A (en) | 2018-08-31 | 2018-08-31 | Refining slag |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108977624A true CN108977624A (en) | 2018-12-11 |
Family
ID=64547503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811007938.0A Pending CN108977624A (en) | 2018-08-31 | 2018-08-31 | Refining slag |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108977624A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110106311A (en) * | 2019-05-16 | 2019-08-09 | 中天钢铁集团有限公司 | It is a kind of to reduce the refining slag control technique corroded resistance to material |
| CN112094981A (en) * | 2020-11-12 | 2020-12-18 | 北京科技大学 | Method for removing bubbles in No. 45 steel |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102010938A (en) * | 2010-12-29 | 2011-04-13 | 重庆大学 | Ladle furnace-vacuum degassing (LF-VD) furnace reduction refining slag with low SiO2 and Al2O3 contents |
| CN102660711A (en) * | 2012-05-23 | 2012-09-12 | 莱芜钢铁集团有限公司 | Steel for petroleum casing connecting piece and manufacturing method thereof |
| CN103320704A (en) * | 2013-07-12 | 2013-09-25 | 安徽工业大学 | High performance bearing steel and production method thereof |
| CN103695785A (en) * | 2013-12-11 | 2014-04-02 | 莱芜钢铁集团有限公司 | Steel for low-temperature and high-pressure pipeline connector and manufacturing method of continuous casting round billet thereof |
| CN103898413A (en) * | 2014-03-18 | 2014-07-02 | 莱芜钢铁集团有限公司 | Steel for nitrogen vanadium microalloyed grinding rod and preparation method thereof |
| CN104060047A (en) * | 2013-09-11 | 2014-09-24 | 攀钢集团攀枝花钢铁研究院有限公司 | Refining method of molten steel used for bearing steel production |
-
2018
- 2018-08-31 CN CN201811007938.0A patent/CN108977624A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102010938A (en) * | 2010-12-29 | 2011-04-13 | 重庆大学 | Ladle furnace-vacuum degassing (LF-VD) furnace reduction refining slag with low SiO2 and Al2O3 contents |
| CN102660711A (en) * | 2012-05-23 | 2012-09-12 | 莱芜钢铁集团有限公司 | Steel for petroleum casing connecting piece and manufacturing method thereof |
| CN103320704A (en) * | 2013-07-12 | 2013-09-25 | 安徽工业大学 | High performance bearing steel and production method thereof |
| CN104060047A (en) * | 2013-09-11 | 2014-09-24 | 攀钢集团攀枝花钢铁研究院有限公司 | Refining method of molten steel used for bearing steel production |
| CN103695785A (en) * | 2013-12-11 | 2014-04-02 | 莱芜钢铁集团有限公司 | Steel for low-temperature and high-pressure pipeline connector and manufacturing method of continuous casting round billet thereof |
| CN103898413A (en) * | 2014-03-18 | 2014-07-02 | 莱芜钢铁集团有限公司 | Steel for nitrogen vanadium microalloyed grinding rod and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110106311A (en) * | 2019-05-16 | 2019-08-09 | 中天钢铁集团有限公司 | It is a kind of to reduce the refining slag control technique corroded resistance to material |
| CN112094981A (en) * | 2020-11-12 | 2020-12-18 | 北京科技大学 | Method for removing bubbles in No. 45 steel |
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| 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: 20181211 |
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| RJ01 | Rejection of invention patent application after publication |