CN102766731A - Vacuum refining process - Google Patents
Vacuum refining process Download PDFInfo
- Publication number
- CN102766731A CN102766731A CN201210225831XA CN201210225831A CN102766731A CN 102766731 A CN102766731 A CN 102766731A CN 201210225831X A CN201210225831X A CN 201210225831XA CN 201210225831 A CN201210225831 A CN 201210225831A CN 102766731 A CN102766731 A CN 102766731A
- Authority
- CN
- China
- Prior art keywords
- vacuum
- calcium
- molten steel
- silicocalcium
- refining process
- 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
Abstract
The invention discloses a vacuum refining process. The vacuum and molten steel circulation conditions in the process of RH treatment are utilized, in the vacuum refining process, calcium-silicon alloy is added into molten steel circulating in a vacuum chamber for calcium treatment at the late stage of vacuum by a vacuum hopper, vacuum circulation treatment then is continuously carried out on the molten steel under vacuum, consequently, the uniform distribution of calcium in the molten steel is guaranteed, and the yield of calcium can be increased. According to the application of the vacuum calcium treatment process, the yield of calcium can be greater than or equal to 15 percent, and moreover, the mass fraction of total oxygen in the vacuum-refined molten steel is controlled to be less than 15*10<-6>.
Description
Technical field:
The invention discloses the technology that a kind of calcium is handled, is a kind of a kind of technology that calcium is handled in the RH refining process of 150 tonnages in steelmaking process.
Background technology:
At present the steel grade of steel-making aluminium deoxidation generally is employed in last one refining and finishes in molten steel a certain amount of calcium line of feeding and carry out calcium and handle, the quiet then certain hour that stirs, make in the steel aluminium be inclusion by the solid-state liquid state that becomes, make inclusion floating be convenient to get rid of.But because calcium is very active and vp is very big, behind calcium line feeding molten steel vigorous reaction and molten steel splash take place usually, cause the volatilization of calcium and the secondary oxidation of molten steel like this, reduced the yield of calcium and polluted molten steel simultaneously.
Summary of the invention
To the problems referred to above, the purpose of this invention is to provide a kind of vacuum refining process, adopt this technology can guarantee calcium uniform distribution in the molten steel, improve the yield of calcium.
The objective of the invention is to realize through following technical scheme:
A kind of vacuum refining process; It is characterized in that vacuum and molten steel cycling condition in this technology utilization RH treating processes; Silicocalcium is joined through vacuum hopper in vacuum latter stage and in the molten steel of Vakuumkammer internal recycle, to carry out calcium and handle, under vacuum tightness, continue then to handle, guarantee calcium uniform distribution in the molten steel carrying out the molten steel vacuum cycle; Improve the yield of calcium, specific as follows:
1) silicocalcium is joined through vacuum hopper in RH refining latter stage and in the molten steel of Vakuumkammer internal recycle, carry out calcium and handle;
2) continue to handle the high yield of calcium uniform distribution and calcium in the realization molten steel under the vacuum tightness to carrying out the molten steel vacuum cycle.
The present invention is adjusted into 500 ~ 1000Pa with the vacuum tightness of Vakuumkammer when adding silicocalcium.Silicocalcium adds and finishes to finish vacuum-treat behind continued vacuum-treat 3 ~ 5min.
The present invention utilizes vacuum and the molten steel cycling condition in the RH treating processes, through vacuum hopper silicocalcium is added latter stage in vacuum, and under vacuum tightness, continues to handle carrying out the molten steel vacuum cycle, can guarantee calcium uniform distribution in the molten steel, improves the yield of calcium.The present invention can guarantee yield>=15% of calcium, and the massfraction of total oxygen is controlled at 15 * 10 in the molten steel after the vacuum refinement
-6In.
Embodiment
Embodiment 1
In the RH of 150 tonnages refining latter stage the vacuum tightness of Vakuumkammer is adjusted into 500Pa, through vacuum hopper silicocalcium is joined then and in Vakuumkammer, continue end treatment behind the vacuum-treat 3min.
Using this yield that realizes routine calcium is 18%, and the massfraction of total oxygen is 13 * 10 in the molten steel after the vacuum refinement
-6
Embodiment 2
In the RH of 150 tonnages refining latter stage the vacuum tightness of Vakuumkammer is adjusted into 1000Pa, through vacuum hopper silicocalcium is joined then and in Vakuumkammer, continue end treatment behind the vacuum-treat 5min.
Using this yield that realizes routine calcium is 16%, and the massfraction of total oxygen is 10 * 10 in the molten steel after the vacuum refinement
-6
Embodiment 3
In the RH of 150 tonnages refining latter stage the vacuum tightness of Vakuumkammer is adjusted into 800Pa, through vacuum hopper silicocalcium is joined then and in Vakuumkammer, continue end treatment behind the vacuum-treat 4min.
Using this yield that realizes routine calcium is 17%, and the massfraction of total oxygen is 11 * 10 in the molten steel after the vacuum refinement
-6
Claims (3)
1. vacuum refining process; It is characterized in that vacuum and molten steel cycling condition in this technology utilization RH treating processes; Silicocalcium is joined through vacuum hopper in vacuum latter stage and in the molten steel of Vakuumkammer internal recycle, to carry out calcium and handle, under vacuum tightness, continue then to handle, guarantee calcium uniform distribution in the molten steel carrying out the molten steel vacuum cycle; Improve the yield of calcium, specific as follows:
1) silicocalcium is joined through vacuum hopper in RH refining latter stage and in the molten steel of Vakuumkammer internal recycle, carry out calcium and handle;
2) continue to handle the high yield of calcium uniform distribution and calcium in the realization molten steel under the vacuum tightness to carrying out the molten steel vacuum cycle.
2. vacuum refining process according to claim 1 is characterized in that: the vacuum tightness with Vakuumkammer when adding silicocalcium is adjusted into 500 ~ 1000Pa.
3. vacuum refining process according to claim 1 and 2 is characterized in that: silicocalcium adds and finishes to finish vacuum-treat behind continued vacuum-treat 3 ~ 5min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210225831XA CN102766731A (en) | 2012-07-03 | 2012-07-03 | Vacuum refining process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210225831XA CN102766731A (en) | 2012-07-03 | 2012-07-03 | Vacuum refining process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102766731A true CN102766731A (en) | 2012-11-07 |
Family
ID=47094297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210225831XA Pending CN102766731A (en) | 2012-07-03 | 2012-07-03 | Vacuum refining process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102766731A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110042202A (en) * | 2019-04-22 | 2019-07-23 | 南京钢铁股份有限公司 | A kind of RH refining furnace vacuum process calcium treating method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101319260A (en) * | 2008-07-17 | 2008-12-10 | 鞍钢股份有限公司 | Technique for controlling accurate addition of micro-element in steel |
| CN101319258A (en) * | 2008-07-11 | 2008-12-10 | 鞍钢股份有限公司 | Technique for preparing fine oxide dispersion steel |
| CN101323893A (en) * | 2008-07-30 | 2008-12-17 | 鞍钢股份有限公司 | Technological process for removing fine occluded foreignsubstance in molten steel |
| CN102134630A (en) * | 2011-04-07 | 2011-07-27 | 河北钢铁股份有限公司唐山分公司 | Calcium treatment method for refining molten steel under vacuum |
| CN102230121A (en) * | 2011-06-17 | 2011-11-02 | 山西太钢不锈钢股份有限公司 | Refining method of T91 heat-resistant steel tube blank |
| CN102268512A (en) * | 2011-07-08 | 2011-12-07 | 攀钢集团有限公司 | Control method for inclusion in steel |
-
2012
- 2012-07-03 CN CN201210225831XA patent/CN102766731A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101319258A (en) * | 2008-07-11 | 2008-12-10 | 鞍钢股份有限公司 | Technique for preparing fine oxide dispersion steel |
| CN101319260A (en) * | 2008-07-17 | 2008-12-10 | 鞍钢股份有限公司 | Technique for controlling accurate addition of micro-element in steel |
| CN101323893A (en) * | 2008-07-30 | 2008-12-17 | 鞍钢股份有限公司 | Technological process for removing fine occluded foreignsubstance in molten steel |
| CN102134630A (en) * | 2011-04-07 | 2011-07-27 | 河北钢铁股份有限公司唐山分公司 | Calcium treatment method for refining molten steel under vacuum |
| CN102230121A (en) * | 2011-06-17 | 2011-11-02 | 山西太钢不锈钢股份有限公司 | Refining method of T91 heat-resistant steel tube blank |
| CN102268512A (en) * | 2011-07-08 | 2011-12-07 | 攀钢集团有限公司 | Control method for inclusion in steel |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110042202A (en) * | 2019-04-22 | 2019-07-23 | 南京钢铁股份有限公司 | A kind of RH refining furnace vacuum process calcium treating method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105483314B (en) | A kind of control method for improving the residual manganese content of converter terminal | |
| CN100580117C (en) | Method for improving and stabilizing boron recovery rate for vacuum smelting steel containing boron | |
| CN103045788A (en) | Reduction steel-making method and reduction steel-marking device | |
| CN102242239A (en) | Molten iron pre-dephosphorization method by utilizing top and bottom combined blown converter | |
| CN102912084B (en) | Molten iron desulfurization method | |
| CN104531953B (en) | A kind of refine argon jetting method being applied to SPHC steel grade | |
| CN102676742A (en) | Process method for reducing RH vacuum decarbonization end-point oxygen content of ultra-low-carbon steel | |
| CN102345047A (en) | 150mm Q245R extra thick plate and production method thereof | |
| CN103205536A (en) | Semi-steel dephosphorizing agent and semi-steel dephosphorizing method | |
| CN102766731A (en) | Vacuum refining process | |
| CN104060051A (en) | Dephosphorizing method of molten steel | |
| CN110819755A (en) | Method for desulfurization during vanadium extraction and tapping of converter | |
| CN102409133A (en) | Method for producing 23MnB steel by adopting vacuum process | |
| CN103160698B (en) | Vanadium nitride alloy production technology | |
| CN101955251A (en) | Coking sewage treating agent and preparation method thereof | |
| CN103468868A (en) | Method for improving cleanness of low-phosphorous interstitial-free steel | |
| CN107287378A (en) | A kind of method of the double acting energy high-efficiency desulfurization of molten iron | |
| CN102828002A (en) | Calcium treatment method of low-carbon and low-silicon Al-killed steel | |
| CN101830591A (en) | Water recycling method for use in extraction process of vanadium pentoxide | |
| CN103757179A (en) | Method for deeply desulfurizing semisteel | |
| CN106544463B (en) | A kind of method for maintaining converter | |
| CN109835974A (en) | A method of utilizing lime treatment acid waste water | |
| CN102719607A (en) | Boron alloying method for ladle refining | |
| CN102839255B (en) | Method for rapidly deoxidizing and remaining carbon by secondarily adding melted iron to electric furnace | |
| CN206927636U (en) | A kind of dehydrogenation of isobutane device waste water reclaiming device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20121107 |