CN103725826A - Steel ladle modifier - Google Patents
Steel ladle modifier Download PDFInfo
- Publication number
- CN103725826A CN103725826A CN201310720254.6A CN201310720254A CN103725826A CN 103725826 A CN103725826 A CN 103725826A CN 201310720254 A CN201310720254 A CN 201310720254A CN 103725826 A CN103725826 A CN 103725826A
- Authority
- CN
- China
- Prior art keywords
- ladle
- industrial
- fluorite
- modification agent
- lime
- 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
- 239000003607 modifier Substances 0.000 title abstract 2
- 229910000831 Steel Inorganic materials 0.000 title description 21
- 239000010959 steel Substances 0.000 title description 21
- 230000004048 modification Effects 0.000 claims abstract description 15
- 238000012986 modification Methods 0.000 claims abstract description 15
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims abstract description 14
- 239000010436 fluorite Substances 0.000 claims abstract description 14
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 12
- 229920002472 Starch Polymers 0.000 claims abstract description 12
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 12
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000000835 fiber Substances 0.000 claims abstract description 12
- 239000004571 lime Substances 0.000 claims abstract description 12
- 235000019698 starch Nutrition 0.000 claims abstract description 12
- 239000008107 starch Substances 0.000 claims abstract description 12
- 239000000203 mixture Substances 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 9
- 239000000440 bentonite Substances 0.000 claims abstract description 7
- 229910000278 bentonite Inorganic materials 0.000 claims abstract description 7
- 150000003839 salts Chemical class 0.000 claims abstract description 7
- 239000000843 powder Substances 0.000 claims abstract description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 14
- 235000002639 sodium chloride Nutrition 0.000 claims description 14
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 12
- 239000011780 sodium chloride Substances 0.000 claims description 9
- 239000004743 Polypropylene Substances 0.000 claims description 3
- 235000002595 Solanum tuberosum Nutrition 0.000 claims description 3
- 244000061456 Solanum tuberosum Species 0.000 claims description 3
- -1 polypropylene Polymers 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- 229910021647 smectite Inorganic materials 0.000 claims description 3
- 239000002893 slag Substances 0.000 abstract description 22
- 238000002844 melting Methods 0.000 abstract description 4
- 230000008018 melting Effects 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000009628 steelmaking Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 241001536352 Fraxinus americana Species 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000007670 refining Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 238000010079 rubber tapping Methods 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 229910000655 Killed steel Inorganic materials 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- FFBHFFJDDLITSX-UHFFFAOYSA-N benzyl N-[2-hydroxy-4-(3-oxomorpholin-4-yl)phenyl]carbamate Chemical compound OC1=C(NC(=O)OCC2=CC=CC=C2)C=CC(=C1)N1CCOCC1=O FFBHFFJDDLITSX-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000003245 working effect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention relates to the field of ladle modification in a steelmaking technology, in particular to a ladle modifier which is characterized by being a mixture prepared from the following raw materials in percentage by weight, wherein the raw materials comprise 7-15% of industrial salt, 15-20% of fluorite, 45-65% of white ash, 5-10% of bentonite, 5-10% of industrial starch and 3-5% of explosion-proof fiber. The preferable proportion of the raw material components is as follows: 10% of industrial salt, 15% of fluorite, 55% of lime, 8% of bentonite powder, 7% of industrial starch and 5% of explosion-proof fiber. Compared with the prior art, the invention has the beneficial effects that: after the component proportion is optimized, the melting point of the ladle top slag can be reduced to below 1400 ℃, and the slag adhesion phenomenon of the ladle is reduced; after pouring is finished, the ladle residues can be smoothly turned out, the service life of the ladle is averagely prolonged by 12 times, and the average good blank amount is averagely increased by 6 t.
Description
Technical field
The present invention relates to the ladle upgrading field in steel-smelting technology, relate in particular to a kind of for reducing ladle top slag fusing point and prevent the ladle modification agent of ladle dry slag.
Background technology
Angang Stock Co., Ltd's steel-making head factory three work area steel grades mostly are aluminium killed steel, need to add a large amount of aluminium or feeding aluminum steel with deoxidation in molten steel alloying and refining process in molten steel, make the Al in slag
2o
3increase, ladle top slag becomes with Al
2o
3with CaO be main high-melting-point slag phase, cause ladle dross serious; And this production line refining region only has the electric furnace of a single station, most steel grades all need to be in ANS-OB or the processing of RH-TB station, these two refining stations just heat up and adjust temperature with alumina, this has more aggravated ladle dry slag, this not only causes the useful volume of ladle to reduce, and has restricted the throughput of converter; And the weight of the empty bag of ladle increases, and is easy to reach or exceed the maximum hoisting weight of driving, bring the hidden danger of secure context to driving operation.Therefore need the serious ladle of dry slag to remove in advance, this not only reduces the bag age of ladle, increases ton steel cost and refractory consumption, increases the workload of unpacking and building bag; And because dry slag thing is often very hard and be mingled with cold steel, giving unpacks brings very large difficulty, therefore, in the urgent need to alleviating or eliminate the dry slag phenomenon of ladle.
Summary of the invention
Object of the present invention provides a kind of ladle modification agent, optimizes modification agent composition proportion, reduces the fusing point of ladle top slag, alleviates the dry slag phenomenon of ladle, thereby further reduces STEELMAKING PRODUCTION cost and refractory consumption.
For achieving the above object, the present invention adopts following technical scheme to realize:
A kind of ladle modification agent, it is the mixture formulated by following raw materials according compositions in weight percentage, wherein Industrial Salt 7～15%, fluorite 15～20%, lime 45～65%, wilkinite 5～10%, industrial starch 5～10%, anti-riot fiber 3～5%;
NaCl content >=92% in described Industrial Salt, moisture≤3%;
CaF in described fluorite
2content is 93%～98%, granularity 1～3mm;
In described lime, CaO content is 95%～98%, granularity 1～3mm;
The using method of this ladle modification agent is when tapping process 1/3, to put in molten steel, and its add-on is 1～5kg/t steel; Or put into molten steel surface in secondary refining process, its add-on is 0.5～2kg/t steel.
Its feed composition preferred proportion is: industrial table salt 10%, fluorite 15%, lime 55%, bentonite in powder 8%, industrial starch 7%, anti-riot fiber 5%.
In described wilkinite, smectite content is 85～90%, and specific surface area is 400～1000m
2/ g.
Described industrial starch meets the standard above grade 2 in industrial potato national sector standard QB.1-92.
Described anti-riot fiber is its length 3～5mm making take polypropylene as raw material, 40～45 microns of diameters, proportion 0.91kg/cm
3, 120 ± 10 ℃ of softening constriction point, 150 ± 10 ℃ of fusing points.
In formula, add a certain amount of industrial table salt, in tapping or refining process, put in molten steel, can react with the oxygen in steel and generate Na
2o, it enters into ladle top slag, meeting and CaO, Al
2o
3, SiO
2deng reaction, generate the complex compound of a series of low melting points, thereby reduce fusing point and the viscosity of ladle top slag; Fluorite is put in molten steel in tapping or refining process, can reduce fusing point and the viscosity of slag; Lime tapping or refining process in put in molten steel, can increase the basicity of ladle top slag, suppress rephosphorization of molten steel and form together with fluorite suitable desulfurization, absorb floating inclusion high alkalinity ladle top slag.
Compared with prior art, the invention has the beneficial effects as follows: by being optimized to after partition ratio, can make, below the melting point depression to 1400 ℃ of ladle top slag, to alleviate the dry slag phenomenon of ladle; After cast finishes, ladle residue can be routed up smoothly, and ladle has on average improved 12 times work-ing life, and average good base amount has on average improved 6t.
Embodiment
Below in conjunction with specific embodiment, the invention will be further described:
Take 180 tons of converters, produce carbon aluminium-killed steel steel as example, each embodiment proportioning raw materials and addition are selected as follows.
Embodiment 1
A kind of ladle modification agent, its feed composition is by weight percentage: industrial table salt 10%, fluorite 15%, lime 55%, bentonite in powder 8%, industrial starch 7%, anti-riot fiber 5%.When tapping process 1/3, put in molten steel, its add-on is 450kg.
Embodiment 2
A kind of ladle modification agent, its feed composition is by weight percentage: industrial table salt 15%, fluorite 15%, lime 52%, bentonite in powder 8%, industrial starch 7%, anti-riot fiber 3%.In secondary refining process, put into molten steel surface, its add-on is 360kg.
Embodiment 3
A kind of ladle modification agent, its feed composition is by weight percentage: industrial table salt 7%, fluorite 20%, lime 48%, bentonite in powder 10%, industrial starch 10%, anti-riot fiber 5%.In secondary refining process, put into molten steel surface, its add-on is 270kg.
In above-described embodiment, NaCl content>=92% in Industrial Salt, moisture≤3%; CaF in fluorite
2content is 93%～98%, granularity 1～3mm; In lime, CaO content is 95%～98%, granularity 1～3mm; In wilkinite, smectite content is 85～90%, and specific surface area is 400～1000m
2/ g.Industrial starch meets the standard above grade 2 in industrial potato national sector standard QB.1-92.Anti-riot fiber is its length 3～5mm making take polypropylene as raw material, 40～45 microns of diameters, proportion 0.91kg/cm
3, 120 ± 10 ℃ of softening constriction point, 150 ± 10 ℃ of fusing points.
Be proven, above-described embodiment all can make below the melting point depression to 1400 ℃ of ladle top slag, thereby has alleviated the dry slag phenomenon of ladle; After cast finishes, ladle residue can be routed up smoothly, and ladle work-ing life and average good base amount are improved.
Claims (5)
1. a ladle modification agent, it is characterized in that, it is the mixture formulated by following raw materials according compositions in weight percentage, wherein Industrial Salt 7～15%, fluorite 15～20%, lime 45～65%, wilkinite 5～10%, industrial starch 5～10%, anti-riot fiber 3～5%;
NaCl content >=92% in described Industrial Salt, moisture≤3%;
CaF in described fluorite
2content is 93%～98%, granularity 1～3mm;
In described lime, CaO content is 95%～98%, granularity 1～3mm.
2. a kind of ladle modification agent according to claim 1, is characterized in that, its feed composition preferred proportion is: industrial table salt 10%, fluorite 15%, lime 55%, bentonite in powder 8%, industrial starch 7%, anti-riot fiber 5%.
3. a kind of ladle modification agent according to claim 1 and 2, is characterized in that, in described wilkinite, smectite content is 85～90%, and specific surface area is 400～1000m
2/ g.
4. a kind of ladle modification agent according to claim 1 and 2, is characterized in that, described industrial starch meets the standard above grade 2 in industrial potato national sector standard QB.1-92.
5. a kind of ladle modification agent according to claim 1 and 2, is characterized in that, described anti-riot fiber is its length 3～5mm making take polypropylene as raw material, 40～45 microns of diameters, proportion 0.91kg/cm
3, 120 ± 10 ℃ of softening constriction point, 150 ± 10 ℃ of fusing points.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310720254.6A CN103725826A (en) | 2013-12-20 | 2013-12-20 | Steel ladle modifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310720254.6A CN103725826A (en) | 2013-12-20 | 2013-12-20 | Steel ladle modifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103725826A true CN103725826A (en) | 2014-04-16 |
Family
ID=50450116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310720254.6A Pending CN103725826A (en) | 2013-12-20 | 2013-12-20 | Steel ladle modifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103725826A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113122680A (en) * | 2021-04-22 | 2021-07-16 | 攀钢集团攀枝花钢铁研究院有限公司 | Steel slag modifier and preparation and use methods thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102560000A (en) * | 2012-03-30 | 2012-07-11 | 德清县力拓炉料有限公司 | Slag conglomeration agent |
| CN102776328A (en) * | 2012-08-21 | 2012-11-14 | 北京科技大学 | Preparation method of steel ladle slag modifier for low-oxygen low-sulfur high-nitrogen steel |
-
2013
- 2013-12-20 CN CN201310720254.6A patent/CN103725826A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102560000A (en) * | 2012-03-30 | 2012-07-11 | 德清县力拓炉料有限公司 | Slag conglomeration agent |
| CN102776328A (en) * | 2012-08-21 | 2012-11-14 | 北京科技大学 | Preparation method of steel ladle slag modifier for low-oxygen low-sulfur high-nitrogen steel |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113122680A (en) * | 2021-04-22 | 2021-07-16 | 攀钢集团攀枝花钢铁研究院有限公司 | Steel slag modifier and preparation and use methods thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140416 |
|
| WD01 | Invention patent application deemed withdrawn after publication |