CN101550465A - Manganese-based fluxing agent for converter steelmaking and preparation method thereof - Google Patents
Manganese-based fluxing agent for converter steelmaking and preparation method thereof Download PDFInfo
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- CN101550465A CN101550465A CNA2008100108966A CN200810010896A CN101550465A CN 101550465 A CN101550465 A CN 101550465A CN A2008100108966 A CNA2008100108966 A CN A2008100108966A CN 200810010896 A CN200810010896 A CN 200810010896A CN 101550465 A CN101550465 A CN 101550465A
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- manganese
- fluxing agent
- powder
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- converter steelmaking
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- 239000011572 manganese Substances 0.000 title claims abstract description 44
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 39
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 title claims abstract description 38
- 229910052748 manganese Inorganic materials 0.000 title claims abstract description 38
- 238000009628 steelmaking Methods 0.000 title claims abstract description 21
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 239000000843 powder Substances 0.000 claims abstract description 22
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 14
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 claims abstract description 12
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 11
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 11
- 239000004571 lime Substances 0.000 claims abstract description 11
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000005245 sintering Methods 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 7
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 7
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000000292 calcium oxide Substances 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims abstract description 5
- 239000004744 fabric Substances 0.000 claims abstract description 4
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 17
- 239000002994 raw material Substances 0.000 claims description 12
- 229910052742 iron Inorganic materials 0.000 claims description 9
- 230000002829 reductive effect Effects 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- 235000013312 flour Nutrition 0.000 claims description 4
- 229960001866 silicon dioxide Drugs 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 abstract description 15
- 239000010959 steel Substances 0.000 abstract description 15
- 230000000694 effects Effects 0.000 abstract description 10
- 230000003628 erosive effect Effects 0.000 abstract description 6
- 238000010304 firing Methods 0.000 abstract description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 3
- 238000003723 Smelting Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 229910052751 metal Inorganic materials 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 abstract 2
- 239000012141 concentrate Substances 0.000 abstract 2
- 239000003638 chemical reducing agent Substances 0.000 abstract 1
- 238000001816 cooling Methods 0.000 abstract 1
- 239000002893 slag Substances 0.000 description 27
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 5
- 239000010436 fluorite Substances 0.000 description 5
- 238000002844 melting Methods 0.000 description 4
- 230000002459 sustained effect Effects 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 239000000956 alloy Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000013467 fragmentation Methods 0.000 description 2
- 238000006062 fragmentation reaction Methods 0.000 description 2
- 229910004261 CaF 2 Inorganic materials 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 229910001570 bauxite Inorganic materials 0.000 description 1
- 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 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000002939 deleterious effect Effects 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- DPTATFGPDCLUTF-UHFFFAOYSA-N phosphanylidyneiron Chemical compound [Fe]#P DPTATFGPDCLUTF-UHFFFAOYSA-N 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
Landscapes
- Manufacture And Refinement Of Metals (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention provides a manganese-based fluxing agent for converter steelmaking, which comprises the following components: 60-75% of manganese oxide, 10-20% of calcium oxide, 5-10% of silicon dioxide, 3-5% of ferrous oxide and 3-5% of aluminum trioxide, wherein the total manganese content in the manganese oxide is 40-55% of the total amount. The preparation method of the fluxing agent comprises the following steps: manganese ore concentrate powder, lime powder and a reducing agent are prepared according to the composition content of a fluxing agent, the prepared materials are uniformly mixed and then fired by a belt sintering machine, the thickness of the cloth during sintering is 300-500 mm, the temperature is controlled at 1300-1500 ℃, and the manganese ore concentrate powder is prepared by cooling and crushing after firing. The manganese-based fluxing agent is beneficial to environmental protection, has good continuous slagging effect, does not generate metal splashing, has small lining erosion, can increase the content of useful elements in molten steel, reduces the smelting cost and improves the quality of the molten steel.
Description
Technical field
The invention belongs to steelmaking technical field, relate in particular to a kind of manganese-based fluxing agent technology that is used for converter steelmaking.
Background technology
In order to guarantee that the initial stage slag early changes, dephosphorization, desulfurization and blowing operation can be carried out smoothly in convertor steelmaking process, need to add a certain amount of fusing assistant, at present, the fusing assistant that adopts in the production mainly contains following several:
1. with CaF
2For what mainly form: fluorite is a kind of slag-making fluxing agent that generally uses, the main component CaF of fluorite
2, the low fusing point that also can significantly reduce CaO of its fusing point, but because fluorite discharges deleterious (F in steelmaking process
-1) element, cause environmental pollution, simultaneously, fluorite corrodes serious to converter lining, and therefore, fluorite is as the fusing assistant use that has been under an embargo.
2. with Al
2O
3Be main vanadine class (red bauxite, bauxitic clay and alumina the are main raw material) fusing assistant of forming: the patent No. is that 99113322.6 Chinese patent discloses a kind of with Al
2O
3Be the main alumina class fusing assistant of forming, it consists of: Al
2O
3〉=45%, SiO
2≤ 30%, Fe
2O
3: 7～8%, surplus is CaO, MgO, TiO
2, impurity such as P, S, granularity is 5～30mm, usage quantity is 1.6～9kg/ ton, the vanadine class thinner slag effect of fluxing is comparatively stable, but exists seriously to lining erosion, changes problems such as the slag effect is not remarkable.
3. be main iron Phosphorus (iron scale, iron ore and iron scale the are main raw material) fusing assistant of forming with FeO: the patent No. is that to disclose a kind of be the iron scale class fusing assistant of main composition with FeO for 99112573.8 Chinese patent, it consists of: iron scale 70～90%, ironmaking mud 5～25%, binding agent 1～5%, with raw material pulverizing, configuration, mixing and suppress balling-up, the iron scale class thinner slag effect of fluxing is comparatively remarkable, but exist serious to lining erosion, make the molten steel temperature drop big, fluxing action time weak point can not the ensured sustained development slag etc. problem.
The common problem that above-mentioned fusing assistant exists is serious to lining erosion, and what have also exists contaminate environment, and it is not remarkable perhaps to change the slag effect, make perhaps that the molten steel temperature drop is big, the fluxing action time is short, can not the ensured sustained development slag etc. problem.
Summary of the invention
The objective of the invention is for overcoming the existing converter steelmaking existing technical problem of fusing assistant, provide a kind of and be beneficial to environmental protection, the ensured sustained development slag is effective, do not produce the metal splash, lining erosion is little, can increase useful element content in the molten steel, reduce smelting cost, improve manganese-based fluxing agent for converter steelmaking of steel quality and preparation method thereof.
Manganese-based fluxing agent for converter steelmaking of the present invention is composed of the following components by weight percentage:
Manganese oxide (Mn
xO
y) 60%～75%,
Calcium oxide (CaO) 10%～20%,
Silicon-dioxide (SiO
2) 5%～10%,
Iron protoxide (FeO) 3%～5%,
Alchlor (Al
2O
3) 3%～5%,
Wherein full manganese (TMn) content is 40%～55% of total amount in the manganese oxide.
The raw material of manganese-based fluxing agent for converter steelmaking of the present invention is manganic concerntrate powder, lime powder and as the coke powder and/or the silica flour of reductive agent; T.Mn content 〉=40%, 60%～70% in the described manganic concerntrate powder is good, and CaO content 〉=80%, 85%～90% of described lime powder is good, C content 〉=90% of described coke powder, more than all be weight percentage.
The preparation method of manganese-based fluxing agent for converter steelmaking of the present invention is: the composition content preparation of manganic concerntrate powder, lime powder and reductive agent being pressed fusing assistant, behind the prepared materials mixing, fire with Dwight-Lloyd sintering machine again, fabric thickness is 300～500mm during sintering, temperature is controlled at 1300～1500 ℃, fire after cool off, fragmentation processes.
For guaranteeing that preparation raw material mixes, make the manganese-based fluxing agent composition after firing even, the granularity of each material is advisable according to following requirement described in the preparation method of manganese-based fluxing agent for converter steelmaking of the present invention: manganic concerntrate powder 0～150 order, lime powder 0～3mm, coke powder 0～3mm, silica flour 0～3mm.
Produce splash in order to prevent that manganese-based fluxing agent from adding in the converter, the granularity of fusing assistant of the present invention should be 10～40mm, and the moisture weight percent content of fusing assistant answers≤1.0%.
Beneficial effect of the present invention: manganese-based fluxing agent of the present invention forms through firing, make the high oxide of manganese in the manganic concerntrate powder be converted to suboxide, its main component is MnO, because MnO is the main component of fluxing, changes the slag effect more significantly so manganese-based fluxing agent has; Because the suitable raising of MnO content can be quickened the dissolution rate of lime in the slag, so can shorten the heat; Because MnO is main and SiO in slag
2, Al
2O
3Generate the low melting component in the table 1, can reduce slag melting, and part Si O
2Combine with MnO, reduce to generate high-melting-point C
2S, C
3The possibility of S, therefore, MnO content has the effect of good sustained slag in the increase slag; Use manganese-based fluxing agent of the present invention can improve the surplus manganese of molten steel, reduce converter terminal molten steel oxygen level and finishing slag (FeO) content, slow down the erosion of slag, and improve alloy material recovery rate and steel quality, the slag blanket low melting point of spattering of formation is reduced mutually furnace lining, sub-melting phenomenon weakens, spatter the slag blanket refractoriness and improve, improve the slag splashing effect, simultaneously, can also improve slag fluidity, reduce sticking rifle phenomenon.
In table 1 slag with Mno bonded classes of compounds and fusing point
| Project | MnO.SiO 2 | 2MnO.SiO 2 | MnO.Al 2O 3 | 3MnO.Al 2O 3.3SiO 2 |
| Fusing point/℃ | 1291 | 1345 | 1560 | 1195 |
Embodiment
The present invention is further described by the following embodiment.
The present invention is an example to prepare 4 kinds of different manganese-based fluxing agent for converter steelmaking of forming content.During preparation table 2 embodiment 1～4 manganese-based fluxing agent, form content according to it earlier and prepares by the proportioning raw materials that table 3 embodiment 1～4 provides, wherein raw materials used and composition and granularity reductive agent of production example 1～4 should meet table 4 requirement.Various raw materials and reductive agent are stirred in mixing machine; The raw material of mixing is laid on the Dwight-Lloyd sintering machine again and fires, fabric thickness is 400mm during sintering, and temperature is controlled at 1400 ℃; At last the manganese-based fluxing agent after firing is carried out fragmentation and screening, just produce and the corresponding manganese-based fluxing agent of table 2 embodiment 1～4 component; The granularity of finished product is 10～40mm, its moisture content is controlled at≤and 1.0%.
Manganese-based fluxing agent of the present invention add-on with 10kg/ ton steel in 100 tons of converters adds, and effect is remarkable: residual manganese [Mn] content increases by 0.1%～0.2% in the terminal point steel, can partly replace the adding of steel alloying manganeseirom, thereby saves ton steel production cost; It is fast to change slag speed, and the continuous action time is long, can shorten smelting cycle 2～4 minutes; Reduce endpoint molten steel oxygen level and finishing slag (FeO), improved yield of alloy and steel quality; Changed the slag composition, the slag splashing effect is improved; Improve slag fluidity, under identical experiment condition, can reduce oxygen rifle dry slag accident rate more than 30%.
Table 2 manganese-based fluxing agent component concentration (weight percent)
The proportioning raw materials of table 3 manganese-based fluxing agent (weight percent)
The raw material of table 4 manganese-based fluxing agent is formed and granularity (weight percent)
Claims (7)
1. manganese-based fluxing agent for converter steelmaking is characterized in that this fusing assistant is composed of the following components by weight percentage:
Manganese oxide (Mn
xO
y) 60%～75%,
Calcium oxide (CaO) 10%～20%,
Silicon-dioxide (SiO
2) 5%～10%,
Iron protoxide (FeO) 3%～5%,
Alchlor (Al
2O
3) 3%～5%,
Wherein full manganese (TMn) content is 40%～55% of total amount in the manganese oxide.
2. according to the described manganese-based fluxing agent for converter steelmaking of claim 1, the raw material that it is characterized in that described fusing assistant is manganic concerntrate powder, lime powder, as the coke powder and/or the silica flour of reductive agent.
3. according to the described manganese-based fluxing agent for converter steelmaking of claim 2, it is characterized in that T.Mn content 〉=40% in the described manganic concerntrate powder, CaO content 〉=80% of described lime powder, C content 〉=90% of described coke powder, more than all be weight percentage.
4. according to the described manganese-based fluxing agent for converter steelmaking of claim 3, it is characterized in that the T.Mn content 60%～70% in the described manganic concerntrate powder, the CaO content 85%～90% of described lime powder, more than all be weight percentage.
5. the preparation method of a claim 1,2 or 3 described manganese-based fluxing agent for converter steelmaking, it is characterized in that the composition content preparation of manganic concerntrate powder, lime powder and reductive agent by fusing assistant, behind the prepared material mixing, fire with Dwight-Lloyd sintering machine, fabric thickness is 300～500mm during sintering, temperature is controlled at 1300～1500 ℃, fire after cool off, broken.
6. according to the preparation method of the described manganese-based fluxing agent for converter steelmaking of claim 5, it is characterized in that the granularity of described each material is respectively: manganic concerntrate powder 0～150 order, lime powder 0～3mm, coke powder 0～3mm, silica flour 0～3mm.
7. according to the preparation method of the described manganese-based fluxing agent for converter steelmaking of claim 5, the granularity that it is characterized in that described fusing assistant is 10～40mm, moisture weight percent content≤1.0%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100108966A CN101550465A (en) | 2008-03-31 | 2008-03-31 | Manganese-based fluxing agent for converter steelmaking and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100108966A CN101550465A (en) | 2008-03-31 | 2008-03-31 | Manganese-based fluxing agent for converter steelmaking and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101550465A true CN101550465A (en) | 2009-10-07 |
Family
ID=41154954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100108966A Pending CN101550465A (en) | 2008-03-31 | 2008-03-31 | Manganese-based fluxing agent for converter steelmaking and preparation method thereof |
Country Status (1)
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|---|---|
| CN (1) | CN101550465A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102618675A (en) * | 2012-04-27 | 2012-08-01 | 四川省达州钢铁集团有限责任公司 | Slagging fusing assistant |
| CN102653813A (en) * | 2012-05-04 | 2012-09-05 | 鞍山市华洋耐火材料厂 | Boron-base fluxing residue for refinement, and preparation and application method thereof |
| CN104878158A (en) * | 2015-06-02 | 2015-09-02 | 钢铁研究总院 | Method for increasing yield of molten steel manganese in manganese ore direct-alloying |
| CN106755715A (en) * | 2016-12-14 | 2017-05-31 | 四川德胜集团钒钛有限公司 | A kind of agent of vanadium slag slag sluicing system and vanadium slag slag sluicing system method |
| CN112522471A (en) * | 2020-11-19 | 2021-03-19 | 山东工业职业学院 | Composite sintered slag power promoter for converter steady-state smelting and use method thereof |
-
2008
- 2008-03-31 CN CNA2008100108966A patent/CN101550465A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102618675A (en) * | 2012-04-27 | 2012-08-01 | 四川省达州钢铁集团有限责任公司 | Slagging fusing assistant |
| CN102653813A (en) * | 2012-05-04 | 2012-09-05 | 鞍山市华洋耐火材料厂 | Boron-base fluxing residue for refinement, and preparation and application method thereof |
| CN104878158A (en) * | 2015-06-02 | 2015-09-02 | 钢铁研究总院 | Method for increasing yield of molten steel manganese in manganese ore direct-alloying |
| CN106755715A (en) * | 2016-12-14 | 2017-05-31 | 四川德胜集团钒钛有限公司 | A kind of agent of vanadium slag slag sluicing system and vanadium slag slag sluicing system method |
| CN112522471A (en) * | 2020-11-19 | 2021-03-19 | 山东工业职业学院 | Composite sintered slag power promoter for converter steady-state smelting and use method thereof |
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|---|---|---|---|
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Application publication date: 20091007 |