CN108220531A - Polybasic aluminum calcium iron liquid steel refining cleanser - Google Patents
Polybasic aluminum calcium iron liquid steel refining cleanser Download PDFInfo
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- CN108220531A CN108220531A CN201810043619.9A CN201810043619A CN108220531A CN 108220531 A CN108220531 A CN 108220531A CN 201810043619 A CN201810043619 A CN 201810043619A CN 108220531 A CN108220531 A CN 108220531A
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- iron liquid
- aluminium
- liquid steel
- calcium iron
- polybasic aluminum
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- 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
- C21C7/06—Deoxidising, e.g. killing
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention discloses a kind of polybasic aluminum calcium iron liquid steel refining cleanser, the mass percent of chemical composition is：Al：30% 60%, Ca：5% 20%, Fe：25% 35%；Remaining is impurity；The fusing point of the polybasic aluminum calcium iron liquid steel refining cleanser of the present invention is controlled in the range of 1300~1400 DEG C, so as to ensure rapidly and uniformly to be melted in 1600 DEG C or so of molten steel, novel refining cleanser controls its subsidence velocity in molten steel based on traditional CaO Al2O3 slag systems；So as to have the function of deoxidation and refining, and it is good with aluminium oxidation product affinity；Meanwhile the polybasic aluminum calcium iron liquid steel refining cleanser has the characteristics that the active ingredient containing purification is high, mobility is high；Rapid slagging in short-term can be stirred in Argon；The features such as oxidisability of slag is good.
Description
Technical field
The present invention relates to liquid steel refining cleanser more particularly to a kind of polybasic aluminum calcium iron liquid steel refining cleansers.
Background technology
At present, there are three types of modes for deoxidation of molten steel:Precipitation desoxydation, diffusive deoxidation and vacuum deaeration are more than deoxidation of molten steel
Three kinds of modes carry out.Precipitation desoxydation refers to makees deoxidier with oxygen combining power compared with iron and the strong element of oxygen combining power, and deoxidier is direct
It is directly acted on oxygen in molten steel, deoxygenation occurs, reaction product is floated by molten steel to be removed, and is occurred so as to reach deoxidation purpose
Reaction it is as follows:
x[M]+y[O]MxOy.
The essence of diffusive deoxidation be between clinker and molten steel there is oxygen gesture balance, i.e. L=(%O)/[%O] wherein, (%
O the mass percent of oxygen in clinker) is represented, [%O] represents that this distribution coefficient of the mass percent of oxygen is temperature in molten steel
When FeO contents constantly reduce in slag, the oxygen in molten steel can be spread function into clinker, to maintain point of the oxygen between slag-steel
Balancing, so as to achieve the purpose that deoxygenation of liquid steel.
Synthetic slag desulphurization mechanism research in molten steel desulfurizing occur key reaction be:(CaO)+[S]=(CaS)+[O].
From the reactions above as can be seen, molten steel desulfurizing effect Oxygen Content in Liquid Steel related with steel oxygen content in water is lower, basicity of slag is got over
Height, molten steel desulfurizing more easy to implement are also often by controlling the two de- because what is usually obtained during smelting molten steel
Sulphur effect, produce high-quality low-sulfur steel however, the dynamic conditions of desulfurization is also the key factor concerning desulfurization effect:
Ws100Fd (%S) d t=km [%S]-ks (%S)
Wherein, Ws represents the quality of slag, and F represents slag interface product, and (%S) represents sulphur mass percent in slag, and t is represented
Time, km represent diffusion coefficient of the sulphur in molten steel, and [%S] represents sulphur mass percent in molten steel, and ks represents sulphur in slag
For diffusion coefficient under actual production conditions, the mass transfer of sulphur is often the speed limit link of entire desulfurization link.Strengthen molten steel stirring,
Enhancing hybrid energy makes molten steel desulfurizing effect reach optimum level.
The deoxidation products that deoxidation of molten steel is formed in the research of field trash removal mechanism is remained in molten steel, is endangered to steel quality
The very big control inclusion content in melting steel content one of evil is control steel oxygen content in water, reduces deoxidier use to the greatest extent；It is arranged second is that taking
Apply fast deoxidation products floating removal and molten steel is purified in tapping process, then made as much as possible in the acceleration of deoxidation of molten steel product
Floating removal.
According to Stocks formula:
Wherein, v represents inclusion floating speed, and g is acceleration of gravity, ρmRepresent molten steel density, ρsRepresent that field trash is close
Degree, r represent the equivalent radius of field trash, and there are quadratic power passes with its size for the ascent rate of η m expression molten steel viscosity field trashes
It is that inclusion sizes are bigger, the cluster shape structure of the faster aluminium oxide deoxidation products of ascent rate causes it is easily connected to grow up,
It is more easy especially in the case of agitation of molten steel.After inclusion floating to desulphurization, slag is to the adsorption energy of field trash
Therefore power then becomes the key factor of influence field trash removal effect, the adsorption effect to field trash is select refining slag one
A key criteria.
Compound liquid steel refining cleanser is added in converter tapping process, converter tapping process can be made full use of good dynamic
Mechanics stirring condition makes refining cleanser collide combination with deoxidation products, and being formed, there are good adsorption properties simultaneously can effectively reduce steel
The reproducibility refining slag system of middle sulfur content effectively realizes molten steel, the deoxidation of slag, desulfurization.After stove ladle argon-blown stirring and it is appropriate
Molten steel scavenger adjustment refining slag ingredient is added, the oxidisability of slag, steel is further reduced, so as to reach good deoxidation, desulfurization
Effect improves and stablizes refining effect.
Refining cleanser must satisfy following requirement:
(1) it has the characteristics that the active ingredient containing purification is high, mobility is high；
(2) rapid slagging within Argon stirring short-term；
(3) the features such as oxidisability of slag is good.
The fusing point of exploitation refining cleanser is controlled in the range of 1300~1400 DEG C, so as to ensure the steel at 1600 DEG C or so
It can rapidly and uniformly be melted in liquid, novel refining cleanser is with traditional CaO-Al2O3Based on slag system, it is controlled in molten steel
Subsidence velocity；So as to have the function of deoxidation and refining, and it is good with aluminium oxidation product affinity.
Invention content
A kind of polybasic aluminum calcium iron liquid steel refining cleanser is provided in the present invention, it is characterised in that：The polybasic aluminum
The mass percent of its chemical composition of calcium iron liquid steel refining cleanser is：Al：30%-60%, Ca：5%-20%, Fe：
25%-35%；Remaining is impurity.
The mass percent content of the impurity of polybasic aluminum calcium iron liquid steel refining cleanser described further：For Si ＜
0.5%th, S ＜ 0.01%, Cu ＜ 0.02%, C ＜ 0.1%.
Further, the preparation method of the polybasic aluminum calcium iron liquid steel refining cleanser, it is characterised in that：
The preparation method of the polybasic aluminum calcium iron liquid steel refining cleanser includes the following steps：
S1:Round steel pipe is fixed in mold；
S2:The calcium pump that mass percent purity is 90%-99% is put into the round steel pipe in step S1 again；
S3:The aluminium ingot that fine aluminium content is 90%-99% is put into resistance furnace and is melted, forms the high-temp liquid of aluminium, and count
It measures in the mold in injection step S1, is melted by the high temperature and the calcium pump in step S2 of liquid aluminium；
S4：After cooling to get to the polybasic aluminum calcium iron liquid steel refining cleanser.
Further, the preparation method of the polybasic aluminum calcium iron liquid steel refining cleanser, it is characterised in that：Described is polynary
The preparation method of aluminium calcium iron liquid steel refining cleanser includes the following steps：
S11:Bloom and aluminium block are fixed in mold；
S12:The calcium pump that mass percent purity is 90%-99% is put into the round steel pipe in step S11 again；
S13:The aluminium ingot that fine aluminium content is 90%-99% is put into resistance furnace and is melted, forms the high-temp liquid of aluminium, and count
It measures in the mold in injection step S11, is melted by the high temperature and the calcium pump in step S12 of liquid aluminium；
S14：After cooling to get to the polybasic aluminum calcium iron liquid steel refining cleanser.
Further, the aluminium ingot is made of A00 national standards, and the calcium pump uses GB/T 4864-2008 national standard systems
Into the round steel pipe is made of GB/T 8162-2008 national standards.
Further, the aluminium ingot is made of A00 national standards, and the bloom and the calcium block are hemispherical junction
The bloom and the calcium block are stitched together as a spherical structure by structure.
The fusing point of the polybasic aluminum calcium iron liquid steel refining cleanser of the present invention is controlled in the range of 1300~1400 DEG C, so as to ensure
It can rapidly and uniformly be melted in 1600 DEG C or so of molten steel, novel refining cleanser is with traditional CaO-Al2O3Slag system is base
Plinth controls its subsidence velocity in molten steel；So as to have deoxidation and refining function, and with aluminium oxidation product affinity
It is good；Meanwhile the polybasic aluminum calcium iron liquid steel refining cleanser has the characteristics that the active ingredient containing purification is high, mobility is high；Energy
Enough rapid slaggings within Argon stirring short-term；The features such as oxidisability of slag is good.
Description of the drawings
Fig. 1 is the preparation flow figure of the first embodiment of the present invention；
Fig. 2 is the preparation flow figure of the second embodiment of the present invention；
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment shall fall within the protection scope of the present invention.
A kind of polybasic aluminum calcium iron liquid steel refining cleanser is provided in the present invention, the mass percent of chemical composition is：
Al：30%-60%, Ca：5%-20%, Fe：25%-35%；Remaining is impurity；The polybasic aluminum calcium iron liquid steel refining purification
The mass percent content of the impurity of agent：For Si ＜ 0.5%, S ＜ 0.01%, Cu ＜ 0.02%, C ＜ 0.1%.On reaching
The technique effect of polybasic aluminum calcium iron liquid steel refining cleanser stated provides 2 polybasic aluminum calcium iron liquid steel refining purifications thus
The manufacturing method of agent.
Embodiment 1：
The preparation method of polybasic aluminum calcium iron liquid steel refining cleanser described in the embodiment of the present invention 1 includes following
Step：
S1:Round steel pipe is fixed in mold；
S2:The calcium pump that mass percent purity is 90%-99% is put into the round steel pipe in step S1 again；
S3:The aluminium ingot that fine aluminium content is 90%-99% is put into resistance furnace and is melted, forms the high-temp liquid of aluminium, and count
It measures in the mold in injection step S1, is melted by the high temperature and the calcium pump in step S2 of liquid aluminium；
S4：After cooling to get to the polybasic aluminum calcium iron liquid steel refining cleanser.
In the present embodiment, the form being mainly fixed on using round steel pipe in mold, while be by mass percent purity
The calcium pump of 90%-99% is put into the round steel pipe in step S1, primarily to ensureing that calcium pump can be in the position in round steel pipe, together
When, it also can guarantee the position that calcium pump is formed in entire polybasic aluminum calcium iron liquid steel refining cleanser, can ensure calcium pump in this way
Content in polybasic aluminum calcium iron liquid steel refining cleanser is wanted this ensure that the mass percent of its its chemical composition meets
It asks；Meanwhile melted the aluminium ingot that fine aluminium content is 90%-99% is put into resistance furnace, the high-temp liquid of aluminium is formed, and measure
In mold in injection step S1, melted by the high temperature and the calcium pump in step S2 of liquid aluminium.It has eventually formed polynary
Aluminium calcium iron liquid steel refining cleanser.
Above preparation method ensure that can rapidly and uniformly melt in 1600 DEG C or so of molten steel, with traditional CaO-
Al2O3Based on slag system, its subsidence velocity in molten steel is controlled；So as to have deoxidation and refining function, and with alumina
Product affinity is good；Meanwhile the polybasic aluminum calcium iron liquid steel refining cleanser has the active ingredient height containing purification, mobility
It is high；Rapid slagging in short-term can be stirred in Argon；The features such as oxidisability of slag is good.
Embodiment 2：
Patent of the present invention provides a kind of preparation method of polybasic aluminum calcium iron liquid steel refining cleanser again, mainly including following
The step of：
S11:Bloom and aluminium block are fixed in mold；
S12:The calcium pump that mass percent purity is 90%-99% is put into the round steel pipe in step S11 again；
S13:The aluminium ingot that fine aluminium content is 90%-99% is put into resistance furnace and is melted, forms the high-temp liquid of aluminium, and count
It measures in the mold in injection step S11, is melted by the high temperature and the calcium pump in step S12 of liquid aluminium；
S14：After cooling to get to the polybasic aluminum calcium iron liquid steel refining cleanser.
In the present embodiment, the form being mainly fixed on using bloom and aluminium block in mold, at the same mass percent is pure
The round steel pipe being put into for the calcium pump of 90%-99% in step S1 is spent, primarily to ensureing that calcium pump can be in the position in round steel pipe
It puts, due to the form of bloom and aluminium block being employed in the present embodiment, since bloom and aluminium block have good performance；Meanwhile
Also it can guarantee in the position that entire polybasic aluminum calcium iron liquid steel refining cleanser bloom and aluminium block are formed, can ensure steel in this way
The content of the steel and aluminium of block and aluminium block in polybasic aluminum calcium iron liquid steel refining cleanser, this ensure that the matter of its its chemical composition
Amount percentage is met the requirements；Meanwhile melted the aluminium ingot that fine aluminium content is 90%-99% is put into resistance furnace, form aluminium
High-temp liquid, and measure in the mold in injection step S1, melted by the high temperature and the calcium pump in step S2 of liquid aluminium.
Polybasic aluminum calcium iron liquid steel refining cleanser is eventually formed.Compared with Example 1 compared with this implementation 2 is by adding bloom and aluminium block
Form, the content of the Fe of polybasic aluminum calcium iron liquid steel refining cleanser can be enhanced, while the density of iron block can be utilized larger
The characteristics of, improve its subsidence velocity in molten steel；Meanwhile the polybasic aluminum calcium iron liquid steel refining cleanser in embodiment 2 is not
Change the function of having deoxidation and refining, and good with aluminium oxidation product affinity；Active ingredient containing purification is high, mobility
It is high；Rapid slagging in short-term can be stirred in Argon；The features such as oxidisability of slag is good.
The polybasic aluminum calcium iron liquid steel refining cleanser obtained by the above embodiments obtains after detection：
The polybasic aluminum calcium iron liquid steel refining cleanser ingredient of embodiment 1：Aluminium content：56-60%, calcium content：10-12%,
Fe：25%-30%；Remaining is impurity.
Raw materials size therein：Calcium pump：φ 25*30mm, round steel pipe：φ 33*30mm, wall thickness 2.75-3.00mm.
Trimmed size：Hemispherical portion：Radius is 22.5mm；Column part：Highly it is 20mm.
The polybasic aluminum calcium iron liquid steel refining cleanser ingredient of embodiment 2：Aluminium content：33-60%, calcium content：7-11%,
Fe：30%-35%；Remaining is impurity.
Raw materials size：Hemispherical bloom：φ 37.5mm, hemispherical calcium block：φ37.5mm.Trimmed size：φ57mm.
Above-mentioned product, specific experimental result is as follows in liquid steel refining outside the Converter of certain steel plant：
It is obvious to a person skilled in the art that the present invention is not limited to the details of above-mentioned exemplary embodiment, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Profit requirement rather than above description limit, it is intended that all by what is fallen within the meaning and scope of the equivalent requirements of the claims
Variation is included within the present invention.Any reference numeral in claim should not be considered as to the involved claim of limitation.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in each embodiment can also be properly combined, forms those skilled in the art
The other embodiment being appreciated that.
Claims (6)
1. a kind of polybasic aluminum calcium iron liquid steel refining cleanser, it is characterised in that：The polybasic aluminum calcium iron liquid steel refining cleanser
The mass percent of its chemical composition be：Al：30%-60%, Ca：5%-20%, Fe：25%-35%；Remaining is impurity.
2. polybasic aluminum calcium iron liquid steel refining cleanser as described in claim 1, it is characterised in that：The polybasic aluminum calcium iron steel
Crystal refines the mass percent content of the impurity of cleanser：For Si ＜ 0.5%, S ＜ 0.01%, Cu ＜ 0.02%, C ＜ 0.1%.
3. the preparation method of polybasic aluminum calcium iron liquid steel refining cleanser as described in claim 1, it is characterised in that：
The preparation method of the polybasic aluminum calcium iron liquid steel refining cleanser includes the following steps：
S1:Round steel pipe is fixed in mold；
S2:The calcium pump that mass percent purity is 90%-99% is put into the round steel pipe in step S1 again；
S3:The aluminium ingot that fine aluminium content is 90%-99% is put into resistance furnace and is melted, forms the high-temp liquid of aluminium, and measure note
Enter in the mold in step S1, melted by the high temperature and the calcium pump in step S2 of liquid aluminium；
S4：After cooling to get to the polybasic aluminum calcium iron liquid steel refining cleanser.
4. the preparation method of polybasic aluminum calcium iron liquid steel refining cleanser as described in claim 1, it is characterised in that：Described is more
The preparation method of first aluminium calcium iron liquid steel refining cleanser includes the following steps：
S11:Bloom and aluminium block are fixed in mold；
S12:The calcium pump that mass percent purity is 90%-99% is put into the round steel pipe in step S11 again；
S13:The aluminium ingot that fine aluminium content is 90%-99% is put into resistance furnace and is melted, forms the high-temp liquid of aluminium, and measure note
Enter in the mold in step S11, melted by the high temperature and the calcium pump in step S12 of liquid aluminium；
S14：After cooling to get to the polybasic aluminum calcium iron liquid steel refining cleanser.
5. polybasic aluminum calcium iron liquid steel refining cleanser as described in claim 3, it is characterised in that：The aluminium ingot uses
A00 national standards are made, and the calcium pump is made of GB/T 4864-2008 national standards, and the round steel pipe uses GB/T 8162-
2008 national standards are made.
6. polybasic aluminum calcium iron liquid steel refining cleanser according to claim 4, it is characterised in that：The aluminium ingot uses
A00 national standards are made, and the bloom and the calcium block are hemispherical dome structure, and the bloom and the calcium block are spliced
Become a spherical structure together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810043619.9A CN108220531A (en) | 2018-01-17 | 2018-01-17 | Polybasic aluminum calcium iron liquid steel refining cleanser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810043619.9A CN108220531A (en) | 2018-01-17 | 2018-01-17 | Polybasic aluminum calcium iron liquid steel refining cleanser |
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| Publication Number | Publication Date |
|---|---|
| CN108220531A true CN108220531A (en) | 2018-06-29 |
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ID=62641307
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| Application Number | Title | Priority Date | Filing Date |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101086028A (en) * | 2007-07-13 | 2007-12-12 | 谢应凯 | Composite deoxidizing agent aluminum-calcium-iron alloy for smelting steel |
| CN101519748A (en) * | 2009-03-11 | 2009-09-02 | 爱德洛（北京）科技有限公司 | Rare-earth aluminum-calcium-iron alloy |
| CN202226877U (en) * | 2011-09-15 | 2012-05-23 | 上海马腾新型材料厂 | Steelmaking aluminum, calcium and iron deoxidizer |
| CN204550650U (en) * | 2015-02-13 | 2015-08-12 | 上海盛宝冶金科技有限公司 | A kind of aluminum calcium ferrum deoxidizer |
| CN107245548A (en) * | 2017-05-31 | 2017-10-13 | 天津炜润达新材料科技有限公司 | A kind of deoxidation in steel making and Calcium treatment calcium core aluminium and its production method |
-
2018
- 2018-01-17 CN CN201810043619.9A patent/CN108220531A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101086028A (en) * | 2007-07-13 | 2007-12-12 | 谢应凯 | Composite deoxidizing agent aluminum-calcium-iron alloy for smelting steel |
| CN101519748A (en) * | 2009-03-11 | 2009-09-02 | 爱德洛（北京）科技有限公司 | Rare-earth aluminum-calcium-iron alloy |
| CN202226877U (en) * | 2011-09-15 | 2012-05-23 | 上海马腾新型材料厂 | Steelmaking aluminum, calcium and iron deoxidizer |
| CN204550650U (en) * | 2015-02-13 | 2015-08-12 | 上海盛宝冶金科技有限公司 | A kind of aluminum calcium ferrum deoxidizer |
| CN107245548A (en) * | 2017-05-31 | 2017-10-13 | 天津炜润达新材料科技有限公司 | A kind of deoxidation in steel making and Calcium treatment calcium core aluminium and its production method |
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