CN1818093A - High-efficient metallurgical refiner and preparation thereof - Google Patents
High-efficient metallurgical refiner and preparation thereof Download PDFInfo
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- CN1818093A CN1818093A CN 200610038689 CN200610038689A CN1818093A CN 1818093 A CN1818093 A CN 1818093A CN 200610038689 CN200610038689 CN 200610038689 CN 200610038689 A CN200610038689 A CN 200610038689A CN 1818093 A CN1818093 A CN 1818093A
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Abstract
The invention is about the metallurgy refined agent which is made up of the MnO 20-30%; Fe 15-35%; CaO 4-15%; MgO 2-15%; the water 0.8-4.1%; SiO2 1.5-9%; Al2O3 0.7-5%. The process is: select the material---breaking----select the ore and wash----preparation concentrate-----batch feeder----add the agglomerant---extrusion forming----roasting----product. It is the refined agent instead of the fluorite and the sludge ball. It can improve the ability of desulphurization and the dephophorization, so it can improve the quality of the steel.
Description
Technical field
The invention belongs to smelting iron and steel, especially relate to a kind of dissolving agent of making steel usefulness.
Background technology
Slag plays a part very important in the steelmaking process, point out in " Electric furnace steel making principle and the technology " that metallurgical industry press publishes (Qiu Shaoqi, Zhu Guihua compile) P89 second joint, in EAF Steelmaking Process, the alkalescence slag making materials mainly contains Wingdale, lime, fluorite and firebrick piece, slag making materials mainly is lime, unprocessed dolomite, and fluorite commonly used in the past is CaF
2As dissolving agent, but fluorite is serious to the erosion of furnace lining, is progressively eliminated, and substitute with sludge ball or the iron scale that metallurgical dust mud etc. is made, but that this type of raw material contains the S amount is very high, causes the S content in the steel to increase 0.02-0.03% and very easily " return sulphur ", reduced steel quality, operating process is loaded down with trivial details, yet does not add the dissolving agent blowing in the steelmaking process, and it is long to change the slag time, slag returns dried mid-term, the splash phenomenon takes place again and again, and the dephosphorization difficulty, and end phosphorus content exceeds standard.
Summary of the invention
The purpose of this invention is to provide a kind of high-efficient metallurgical refiner and manufacture method thereof, neither corroding furnace lining in steelmaking process can replace fluorite, sludge ball to make dissolving agent again, improve dephosphorization and sweetening power in the steel-making, reduce the intermediary and later stages splash of smelting, improve the quality of steel effectively.
The object of the present invention is achieved like this: a kind of high-efficient metallurgical refiner, mainly form by weight percentage: manganese oxide MnO:20-30% by following component and content; Iron TFe:15-35%; Calcium oxide CaO:4-15%; Magnesium oxide MgO:2-15%; Water: 0.8-4.1%; Silicon-dioxide SiO
2: 1.5-9%; Aluminium sesquioxide Al
2O
3: 0.7-5%.
In the above-mentioned component:
Manganese oxide MnO: reduce slag melting, help rapid slagging of smelting initial stage, in slag, can dwindle CaSiO
2, CaSiO
4Phase region, make slag in very wide temperature range, keep evenly liquid, the raising of MnO content helps desulfurization;
Iron TFe: in smelting, form iron protoxide, have the promotionization slag, reduce slag viscosity, the effect of dilution slag, the good fluidity of slag and even can relax the generation of " returning dried ", and TFe can increase the FeO in the initial stage slag, helps dephosphorization;
Silicon-dioxide: SiO
2Form quaternary with calcium oxide, aluminium sesquioxide, manganese oxide and mix slag system;
Aluminium sesquioxide Al
2O
3: form quaternary with silicon-dioxide, calcium oxide, manganese oxide and mix slag system;
Calcium oxide CaO: be used for dephosphorization and desulfurization;
Magnesium oxide MgO: the protection furnace lining, and with CaO and acid P
2O
5In conjunction with, reduced the γ in the slag
P2O5Coefficient
Because CaO, FeO content in the slag have important effect to dephosphorisation reaction, generate P during phosphorus oxidation
2O
5, the CaO effect generates and 3CaO.P then
2O
5Or 4CaO.P
2O
5, the reaction formula of dephosphorization P is:
So make the fusing point that the high-efficient metallurgical refiner that adds compositions such as a certain amount of MnO of containing, TFe in the material slag can reduce slag to converter at the smelting initial stage, accelerate the fusing of slag, help the carrying out of dephosphorization P; Owing to contain the effect that MnO, TFe have the promotionization slag, reduce slag viscosity, dilute slag in this high-efficient metallurgical refiner, the good fluidity of slag and even can relax the generation of " returning dried ", reduces the generation of splash effectively; MnO in this high-efficient metallurgical refiner can fully dwindle Ca in slag
2SiO
3, Ca
3SiO
4Phase region, make slag in very wide temperature range, keep evenly liquid; The adding of high-efficient metallurgical refiner can increase the content of MnO in the slag, and then the reduction owing to MnO raises the residual manganese content of steel when blow end point, eliminates the hot-short tendency of sulphur S, can reduce the add-on of ferromanganese, reduces consuming, the saving cost;
In addition, contain [MnO] high-efficient metallurgical refiner DIRECT ALLOYING and help improving sulfur partition ratio, the raising of [MnO] content in the slag improves the flowability of slag, helps desulfurization.
The manufacture method of high-efficient metallurgical refiner proposed by the invention at normal temperatures and pressures, adopts existing general-purpose equipment, and its manufacturing process flow is:
Wherein:
Select materials: raw material ferrimanganic ore deposit is carried out preferably, and remove part mud layer in the raw ore;
Broken: as to carry out coarse crushing with jaw crusher;
Sieve, join the ore deposit: sieve apparatus sieves, and according to the requirement of product and the chemical ingredients of preliminary raw material, joins the ore deposit with Wingdale, rhombspar, makes the chemical ingredients index in controlled scope;
Finished product I: for the particle of particle diameter 3-5mm, mix the back and directly form finished product I, form is that size ratio is considered the shape solid more uniformly to be worth doing;
Fines: particle diameter is milled to below the particle diameter 1mm with ball mill less than the particle of 3-5mm, so that bonding;
Adding additives: add binding agent (cement: wilkinite: water glass=1: 1: 1), when employed raw material granularity is big, can suitably increase the content of water glass, but the ratio of control binding agent and raw material is 8: 92;
Extrusion forming: make ball with the ball press pressurization;
Product I I: the flat spheroid that is shaped as diameter 20-40mm.
In addition, the manufacture method of high-efficient metallurgical refiner, its manufacturing process flow is:
1, select materials 2, broken 3, ore dressing, washing 4, concentrate 5, batching 6, adding additives 7, extrusion forming 8, roasting 9, product
Wherein:
1, selects materials: when the raw ore of pyrolusite, manganite, hausmannite is exploited out, all present moist mud shape;
2, fragmentation: select for use common hammer mill to carry out fragmentation;
3, ore dressing, washing: carry out magnetic separation with the wet high-intensity magnetic machine, require tube Surface field intensity to be not less than 3000 Gausses, re-use and revolve chute and wash, tailings discards;
4, concentrate: contain in the concentrate TMn greater than 20% for qualified raw material;
5, batching: manganic concerntrate and Wingdale, rhombspar are joined the ore deposit;
6, adding additives; Binding agent consist of cement: wilkinite: water glass=1: 1: 1, the proportion of composing of binding agent and raw material are 8: 92;
7, extrusion forming: ball press is used in extrusion forming, and peak pressure 10T, sphere diameter are the flattened ball of 20-40mm;
8, roasting: use common stoving oven to carry out the reducing atmosphere roasting, maturing temperature 850-950 degree centigrade, roasting time is 30-75 minute;
9, product: the flat spheroid that is shaped as diameter 20-40mm.
The add-on of this high-efficient metallurgical refiner is a 10-30kg/ ton steel, and the 1/2-3/5 that high-efficient metallurgical refiner adds total amount adds with first slag charge, and after blowing 3-5 minute, bath temperature rises and adds rest part again.
High-efficient metallurgical refiner slag effect proposed by the invention is obviously improved, reduce " returning dried " and splash effectively, reduced the consumption of slag making material, extending furnace lining life, dephosphorization, sweetening effectiveness are good, and can reduce the usage quantity of Mn series alloy in the smelting process, reduce smelting cost, shorten the heat, improved the quality and the output of steel.
Now in conjunction with the accompanying drawings, embodiment and Comparative Examples are further described high-efficient metallurgical refiner proposed by the invention.
Description of drawings
Fig. 1 is the manufacturing process flow diagram of high-efficient metallurgical refiner manufacture method proposed by the invention.
Among Fig. 1: 1, select materials 2, broken 3, ore dressing, washing 4, concentrate 5, batching 6, adding additives 7, extrusion forming 8, roasting 9, product
Specific implementation method
Embodiment:
This high-efficient metallurgical refiner uses in certain steel mill, and table 1 is manufacturer's analysis data of stocking up:
Table 1: manufacturer's analysis data of stocking up
| Sequence number | Element | MnO | TFe | CaO | MgO | H 2O (always) | SiO 2 | Al
2 |
| 1 | Content, % | 24.5 | 26.5 | 5.8 | 13.5 | 2.2 | 3.1 | 4.3 |
| 2 | Content, % | 20.8 | 29.5 | 10.2 | 2.5 | 4.0 | 2.4 | 2.8 |
| 3 | Content, % | 27.3 | 22.3 | 8.9 | 4.3 | 0.9 | 4.3 | 3.5 |
| 4 | Content, % | 22.3 | 25.2 | 8.4 | 3.0 | 1.3 | 5.9 | 2.1 |
Annotate: other composition manufacturer is not detected
Comparative Examples: this high-efficient metallurgical refiner uses in certain steel mill, and table 2 be an original table, the table operational circumstances when not adding efficient metallurgical refiner, and table 3 is a contrast table, table operational circumstances during for every stove adding high-efficient metallurgical refiner 350kg (12kg/ ton steel).
Table 2: converter nominal capacity 30T does not add metallurgical refiner table operational circumstances
| Sequence number | Heat (batch) number | Add metallurgy lime kg | Add light dolomite Kg | Oxygen blow duration, min | One falls molten steel composition | Temperature (℃) | Phenomenon when reinforced | Phenomenon during slagging | ||||
| C％ | Mn％ | P％ | S％ | |||||||||
| 1 | 14223 | 2650 | 530 | 12.5 | 0.159 | 0.551 | 0.0256 | 0.03 | 1740 | | Slag overflows | |
| 2 | 14223 | 2620 | 530 | 12.1 | 0.155 | 0.535 | 0.0266 | 0.0325 | 1636 | Burn | ||
| 3 | 14270 | 2600 | 530 | 11.4 | 0.181 | 1.416 | 0.0323 | 0.0324 | 1699 | Slag overflows | ||
The every stove of table 3 adds metallurgical refiner 350Kg table operational circumstances
| Sequence number | Heat (batch) number | Add lime kg | Add light-burned Kg | Oxygen blow duration, min | One falls molten steel composition | Temperature (℃) | Phenomenon when reinforced | Phenomenon during slagging | |||
| C％ | Mn％ | P％ | S％ | ||||||||
| 1 | 14335 | 2000 | 300 | 11.9 | 0.209 | 0.634 | 0.0313 | 0.0291 | |||
| 2 | 14336 | 1900 | 300 | 11.2 | 0.161 | 0.458 | 0.0401 | 0.0453 | 1681 | | |
| 3 | 14339 | 2000 | 300 | 11.6 | 1.028 | 1.463 | 0.0263 | 0.028 | |||
| 4 | 14340 | 2000 | 300 | 11.3 | 0.204 | 1.431 | 0.0253 | 0.0307 | |||
Can learn from table 2 data, in this factory's routine operation, overflow slag and splash phenomenon take place very easily when reinforced.In table 3, adding metallurgical refiner 350kg, when promptly being equivalent to molten steel add-on 12kg per ton, the splash phenomenon only takes place one time, the blowout prevention effect of this metallurgical refiner is described and change slag respond well, possess good dephosphorization, sweetening power.
Table 4 is a contrast table, and converter nominal 50T adds high-efficient metallurgical refiner 15kg/ ton steel, per 10 stove table operational circumstances (mean value)
| Classification | S ％ | MnO ％ | Tap to tap time min | Silicomanganese add-on Kg | Use silicomanganese add-on Kg less | Behaviour in | |
| 1 | Conventional | 0.025 | 0.80 | 47.3 | 630 | Splash 7, sticking rifle 5 times, | |
| 2 | Add sequence number among the embodiment and be 2 high-efficient metallurgical refiner | 0.021 | 0.83 | 42.4 | 570 | 60 | Slight |
| 3 | Add sequence number among the embodiment and be 3 high-efficient metallurgical refiner | 0.019 | 0.83 | 42.5 | 560 | 70 | Slight |
| 4 | Add sequence number among the embodiment and be 2 high-efficient metallurgical refiner, add-on improves 30% | 0.017 | 0.85 | 42.2 | 545 | 85 | Slight |
As can be seen from Table 4, add this high-efficient metallurgical refiner, shortened tap to tap time effectively, reduced the silicomanganese add-on, improved the manganese content of steel, reduced smelting cost.
Claims (6)
1, a kind of high-efficient metallurgical refiner mainly is made up of following component and content by weight percentage: manganese oxide MnO:20-30%; Iron TFe:15-35%; Calcium oxide CaO:4-15%; Magnesium oxide MgO:2-15%; Water: 0.8-4.1%; Silicon-dioxide SiO
2: 1.5-9%; Aluminium sesquioxide Al
2O
3: 0.7-5%.
2, the manufacture method of high-efficient metallurgical refiner, its manufacturing process flow be 1, select materials 2, broken 3, ore dressing, washing 4, concentrate 5, batching 6, adding additives 7, extrusion forming 8, roasting 9, product.
3, the manufacture method of high-efficient metallurgical refiner according to claim 2, its ore dressing, washing are to carry out magnetic separation with the wet high-intensity magnetic machine, require a Surface field intensity to be not less than 3000 Gausses, re-use to revolve chute and wash, tailings discards
4, the manufacture method of high-efficient metallurgical refiner according to claim 2, its binding agent consist of cement: wilkinite: water glass=1: 1: 1, the proportion of composing of binding agent and raw material are 8: 92.
5, the manufacture method of high-efficient metallurgical refiner according to claim 2, its roasting are to use common stoving oven to carry out the reducing atmosphere roasting, and maturing temperature 850-950 degree centigrade, roasting time is 30-75 minute.
6, the manufacture method of high-efficient metallurgical refiner according to claim 2, its shape of product are the flat spheroid of diameter 20-40mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100386892A CN100350060C (en) | 2006-03-08 | 2006-03-08 | High-efficient metallurgical refiner and preparation thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100386892A CN100350060C (en) | 2006-03-08 | 2006-03-08 | High-efficient metallurgical refiner and preparation thereof |
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|---|---|
| CN1818093A true CN1818093A (en) | 2006-08-16 |
| CN100350060C CN100350060C (en) | 2007-11-21 |
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|---|---|---|---|
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| CN100564548C (en) * | 2007-10-10 | 2009-12-02 | 攀钢集团攀枝花钢铁研究院 | High-alkalinity refining slag for slag washing of converter steelmaking |
| CN101798611A (en) * | 2010-04-07 | 2010-08-11 | 郑州市鑫磊冶金材料有限公司 | Freon-free slagging agent for rotating furnace |
| CN102080143A (en) * | 2010-12-07 | 2011-06-01 | 宜兴市瑞华新型炉料厂 | High-purity refining synthetic slag and preparation method thereof |
| CN101736115B (en) * | 2009-12-22 | 2011-11-02 | 马鞍山钢铁股份有限公司 | Converter-strengthened slagging agent and preparation method and using method thereof |
| CN101660018B (en) * | 2009-09-17 | 2012-11-28 | 陆建荣 | Compound slagging agent of converter and preparation method and applications thereof |
| CN103031399A (en) * | 2012-05-31 | 2013-04-10 | 新疆八一钢铁股份有限公司 | Method for converter slagging regulation production |
| CN103146879A (en) * | 2013-02-04 | 2013-06-12 | 安徽省繁昌县皖南阀门铸造有限公司 | Steelmaking refining agent containing modified smectite powder and preparation method thereof |
| TWI408237B (en) * | 2010-12-29 | 2013-09-11 | Univ Nat Chunghsing | Composition of de-sulfur agent for ladle furance of refining process and method for removing sulfur from the molten steel in ladle furnace |
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| CN107584088A (en) * | 2017-08-11 | 2018-01-16 | 河南华西耐火材料有限公司 | One kind heating slugging coverture and preparation method thereof |
| CN111455169A (en) * | 2020-05-29 | 2020-07-28 | 攀钢集团攀枝花钢铁研究院有限公司 | Manganese ore directly-alloyed ball and preparation method thereof |
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| KR100825554B1 (en) * | 2001-09-14 | 2008-04-25 | 주식회사 포스코 | A Method for Refining Hot Metal in a Converter with High Efficiency of Dephosphurization |
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| CN100564548C (en) * | 2007-10-10 | 2009-12-02 | 攀钢集团攀枝花钢铁研究院 | High-alkalinity refining slag for slag washing of converter steelmaking |
| CN101660018B (en) * | 2009-09-17 | 2012-11-28 | 陆建荣 | Compound slagging agent of converter and preparation method and applications thereof |
| CN101736115B (en) * | 2009-12-22 | 2011-11-02 | 马鞍山钢铁股份有限公司 | Converter-strengthened slagging agent and preparation method and using method thereof |
| CN101798611A (en) * | 2010-04-07 | 2010-08-11 | 郑州市鑫磊冶金材料有限公司 | Freon-free slagging agent for rotating furnace |
| CN102080143A (en) * | 2010-12-07 | 2011-06-01 | 宜兴市瑞华新型炉料厂 | High-purity refining synthetic slag and preparation method thereof |
| TWI408237B (en) * | 2010-12-29 | 2013-09-11 | Univ Nat Chunghsing | Composition of de-sulfur agent for ladle furance of refining process and method for removing sulfur from the molten steel in ladle furnace |
| CN103031399A (en) * | 2012-05-31 | 2013-04-10 | 新疆八一钢铁股份有限公司 | Method for converter slagging regulation production |
| CN103146879A (en) * | 2013-02-04 | 2013-06-12 | 安徽省繁昌县皖南阀门铸造有限公司 | Steelmaking refining agent containing modified smectite powder and preparation method thereof |
| CN103352100A (en) * | 2013-07-23 | 2013-10-16 | 山东莱钢永锋钢铁有限公司 | Raw rauhkalk steelmaking method |
| CN107584088A (en) * | 2017-08-11 | 2018-01-16 | 河南华西耐火材料有限公司 | One kind heating slugging coverture and preparation method thereof |
| CN111455169A (en) * | 2020-05-29 | 2020-07-28 | 攀钢集团攀枝花钢铁研究院有限公司 | Manganese ore directly-alloyed ball and preparation method thereof |
| CN113684372A (en) * | 2021-07-29 | 2021-11-23 | 昆明贵研新材料科技有限公司 | Method for recovering platinum group metal from spent automobile catalyst |
| CN113684372B (en) * | 2021-07-29 | 2022-09-16 | 昆明贵研新材料科技有限公司 | Method for recovering platinum group metal from spent automobile catalyst |
| CN115341056A (en) * | 2022-08-22 | 2022-11-15 | 河北濡春新能源集团有限公司 | Rare earth nano metallurgy smelting agent |
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