CN104593538B - A kind of slag sluicing system method of high-titanium molten iron - Google Patents
A kind of slag sluicing system method of high-titanium molten iron Download PDFInfo
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Abstract
The embodiment of the invention discloses a kind of slag sluicing system method of high-titanium molten iron, including: after carrying out described high-titanium molten iron spraying magnesium desulfurization, described high-titanium molten iron adds lime particle to be polymerized the desulfurization slag in described high-titanium molten iron；Carry out described high-titanium molten iron skimming, to reduce the desulfurization slag in described high-titanium molten iron for the first time；In described high-titanium molten iron, add iron scale, and described high-titanium molten iron is carried out jet stirring, to reduce the Ti content in described high-titanium molten iron；Described high-titanium molten iron carries out second time skim, to reduce the desulfurization slag in described high-titanium molten iron further.When the method that the present invention provides is in order to solve in prior art to skim the high-titanium molten iron after desulfurization, there is slag sluicing system difficulty, cause the technical problem wasting molten iron.Realize cost-effective technique effect.
Description
Technical field
The present invention relates to steelmaking technical field, particularly relate to a kind of slag sluicing system method of high-titanium molten iron.
Background technology
During blast furnace ironmaking, in order to safeguard blast furnace lining, through frequently with the side adding titanium ore in blast furnace
Method carries out furnace retaining, and therefore, the Ti content in molten iron can increase, and uses titanium before the desulfurizing iron after titanium ore furnace retaining
Content is generally capable of up between 0.08 0.20%, owing to the carbon content in molten iron is higher, therefore at molten iron
In react Ti in generation TiC, the N dusted in carrier during this external winding-up and ferrum liquid due to carbon and titanium
Reaction generates TiN, and both compounds with solid separation, and all have higher fusing point under molten iron temperature,
Thus affect the viscosity of molten iron, and make mobility decline, the not free settling of the iron shot in desulfurization slag after desulfurization, formed
Semi-vitreous slag ferrum consolute slag system, causes difficulty of skimming.
In order to avoid time sulfur caused by desulfurizing slag of hot metal, need to remove desulfurization slag as far as possible, but in molten iron
When Ti content is higher, due to slag sluicing system difficulty, during skimming, substantial amounts of molten iron is removed with slag, leads
Causing molten iron loss relatively big, molten iron loss amount is even up to molten iron 4kg per ton, causes damage bigger.
As can be seen here, when the high-titanium molten iron after desulfurization is skimmed, there is slag sluicing system difficulty, cause wave
Take the technical problem of molten iron.
Summary of the invention
The embodiment of the present invention provides a kind of slag sluicing system method of high-titanium molten iron, to solve in prior art de-
When high-titanium molten iron after sulfur is skimmed, there is slag sluicing system difficulty, cause the technical problem wasting molten iron.
The embodiment of the present application provides following technical scheme:
A kind of slag sluicing system method of high-titanium molten iron, including:
After carrying out described high-titanium molten iron spraying magnesium desulfurization, described high-titanium molten iron adds lime particle with poly-
Close the desulfurization slag in described high-titanium molten iron；
Carry out described high-titanium molten iron skimming, to reduce the desulfurization slag in described high-titanium molten iron for the first time；
In described high-titanium molten iron, add iron scale, and described high-titanium molten iron is carried out jet stirring, with fall
Ti content in low described high-titanium molten iron；
Described high-titanium molten iron carries out second time skim, to reduce the desulfurization in described high-titanium molten iron further
Slag.
Optionally, described addition lime particle in described high-titanium molten iron, particularly as follows: at described high titanium per ton
Molten iron adds the lime particle of 3～6kg.
Optionally, described carry out described high-titanium molten iron is skimmed for the first time, particularly as follows: to described high-titanium molten iron
Carry out skimming for the first time, with remove desulfurization slag total amount in described high-titanium molten iron 50%～70% desulfurization slag,
Wherein, described desulfurization slag total amount was skimmed by described first time and described second time is skimmed clawed desulfurization slag
With.
Optionally, described addition iron scale in described high-titanium molten iron, particularly as follows: at described high titanium per ton
Molten iron adds the iron scale of 3～6kg, wherein, content >=70% of ferrum oxide in described iron scale.
Optionally, described described high-titanium molten iron is carried out jet stirring, particularly as follows: be placed on by spray gun described
The position of 200～600mm below high-titanium molten iron liquid level, controls described spray gun jet and stirs described high-titanium molten iron
The duration of 30～90s, wherein, total jet amount of described spray gun is described high-titanium molten iron jet 1～2m per ton3。
Optionally, also include: stand described before second time skims described described high-titanium molten iron carried out
The duration of high-titanium molten iron 1～2min.
Optionally, Ti content >=0.05% in described high-titanium molten iron.
The one or more technical schemes provided in the embodiment of the present application, at least have the following technical effect that or excellent
Point:
The slag sluicing system method of the high-titanium molten iron that the embodiment of the present application provides, first adds Calx in high-titanium molten iron
Granule is to converge the desulfurization slag on surface, and tentatively reduces the desulfurization slag on molten iron surface by skimming for the first time
Content, adds iron scale, by the reaction of ferrum oxide Yu titanium, reduces the content of titanium in molten iron, thus
Reduce titanium carbide and the content of titanium nitride, to reduce molten iron viscosity, beneficially slag sluicing system, simultaneously because oxygen
Change the titanium on iron sheet and molten iron surface reacting is exothermic reaction, and the temperature raising at slag ferrum interface is dropped further
Low molten iron viscosity, beneficially slag sluicing system, after slag sluicing system is easy, then carry out skimming for the second time, subtract
The iron water amount carried in the desulfurization slag clawed less, it is achieved that cost-effective technique effect.
Accompanying drawing explanation
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, institute in embodiment being described below
The accompanying drawing used is needed to be briefly described, it should be apparent that, the accompanying drawing in describing below is only the present invention
Embodiment, for those of ordinary skill in the art, on the premise of not paying creative work, also
Other accompanying drawing can be obtained according to the accompanying drawing provided.
Fig. 1 is the flow chart of the slag sluicing system method of high-titanium molten iron in the embodiment of the present invention；
Fig. 2 is the process chart of slag sluicing system in the embodiment of the present invention.
Detailed description of the invention
The embodiment of the present invention provides a kind of slag sluicing system method of high-titanium molten iron, to solve in prior art de-
When high-titanium molten iron after sulfur is skimmed, there is slag sluicing system difficulty, cause the technical problem wasting molten iron.
Achieve cost-effective technique effect.
In order to solve the technical problem that above-mentioned prior art exists, the technical scheme that the embodiment of the present application provides
General thought is as follows:
A kind of slag sluicing system method of high-titanium molten iron, it is characterised in that including:
After carrying out described high-titanium molten iron spraying magnesium desulfurization, described high-titanium molten iron adds lime particle with poly-
Close the desulfurization slag in described high-titanium molten iron；
Carry out described high-titanium molten iron skimming, to reduce the desulfurization slag in described high-titanium molten iron for the first time；
In described high-titanium molten iron, add iron scale, and described high-titanium molten iron is carried out jet stirring, with fall
Ti content in low described high-titanium molten iron；
Described high-titanium molten iron carries out second time skim, to reduce the desulfurization in described high-titanium molten iron further
Slag.
By foregoing it can be seen that the slag sluicing system method of high-titanium molten iron that provides of the embodiment of the present application,
In high-titanium molten iron, first add lime particle to converge the desulfurization slag on surface and preliminary by skimming for the first time
Reduce the desulfurization slag content on molten iron surface, add iron scale, by the reaction of ferrum oxide Yu titanium, subtract
The content of titanium in few molten iron, thus reduce the content of titanium carbide and titanium nitride, to reduce molten iron viscosity, profit
In slag sluicing system, simultaneously because it is exothermic reaction that the titanium on iron scale and molten iron surface reacts, Zha Tie circle
The temperature in face improves, and reduces molten iron viscosity, beneficially slag sluicing system further, after slag sluicing system is easy,
Carry out second time to skim, reduce the iron water amount carried in the desulfurization slag clawed, it is achieved that cost-effective
Technique effect.
In order to be better understood from technique scheme, below in conjunction with Figure of description and concrete embodiment party
Technique scheme is described in detail by formula, it should be understood that the tool in the embodiment of the present invention and embodiment
Body characteristics is to describe technical solution of the present invention in detail rather than restriction to technical solution of the present invention,
In the case of not conflicting, the technical characteristic in the embodiment of the present invention and embodiment can be mutually combined.
In the embodiment of the present application, it is provided that a kind of slag sluicing system method of high-titanium molten iron, refer to Fig. 1,
Fig. 1 is the flow chart of the slag sluicing system method of a kind of high-titanium molten iron in the embodiment of the present invention, and described method includes:
Step S101, after carrying out described high-titanium molten iron spraying magnesium desulfurization, adds stone in described high-titanium molten iron
Ash particle is to be polymerized the desulfurization slag in described high-titanium molten iron；
Step S102, carries out described high-titanium molten iron skimming for the first time, to reduce taking off in described high-titanium molten iron
Sulfur slag；
Step S103, adds iron scale in described high-titanium molten iron, and described high-titanium molten iron is carried out jet
Stirring, to reduce the titanium carbide content in described high-titanium molten iron；
Step S104, carries out second time and skims described high-titanium molten iron, to reduce described high-titanium molten iron further
In desulfurization slag.
Below in conjunction with the complete process flow of the slag sluicing system of high-titanium molten iron, to the above-mentioned slag utilizing high-titanium molten iron
Ferrum separation method is described in detail:
Refer to Fig. 2, Fig. 2 is the process chart of slag sluicing system in the embodiment of the present invention.
As in figure 2 it is shown, first, ironmaking processes adds in blast furnace titanium ore, generates high-titanium molten iron.
Specifically, adding titanium ore and can safeguard blast furnace lining, the molten iron titaniferous amount after titanium ore that adds increases, for
High-titanium molten iron, in the embodiment of the present application, when Ti content >=0.05% in described high-titanium molten iron, is suitable for
The slag sluicing system method of the high-titanium molten iron of present invention offer is provided.
It follows that described high-titanium molten iron is sprayed magnesium desulfurization.
Subsequently, described high-titanium molten iron adds lime particle.
I.e. perform step S101, after carrying out described high-titanium molten iron spraying magnesium desulfurization, in described high-titanium molten iron
Add lime particle to be polymerized the desulfurization slag in described high-titanium molten iron.
Specifically, owing to Calx has the feature that desulfurization slag can be made to be polymerized, therefore in described high-titanium molten iron
Surface add lime particle can be beneficial to desulfurization slag be polymerized；
In the embodiment of the present application, described high-titanium molten iron adds lime particle, is specifically as follows: often
The described high-titanium molten iron of ton adds the lime particle of 3～6kg.
Certainly, in specific implementation process, it is also possible to be addition pulverized limestone in described high-titanium molten iron.
Subsequently, carry out skimming for the first time.
I.e. perform step S102, carry out described high-titanium molten iron skimming, to reduce described high-titanium molten iron for the first time
In desulfurization slag.
In the embodiment of the present application, described carry out described high-titanium molten iron is skimmed for the first time, particularly as follows:
Carry out described high-titanium molten iron skimming for the first time, to remove desulfurization slag total amount in described high-titanium molten iron
The desulfurization slag of 50%～70%, wherein, described desulfurization slag total amount is to skim described first time and described second time
The sum of clawed desulfurization slag of skimming, wherein, described 50%～70% is mass percent.
Specifically, owing to lime particle have accumulated desulfurization slag, therefore described first time skims and can not take in guarantee
In the case of band molten iron, claw most desulfurization slag, after skimming through described first time, described
The desulfurization quantity of slag in high-titanium molten iron is less, and the liquid level of described high-titanium molten iron can go out by partial denudation.
Subsequently, in described high-titanium molten iron, add iron scale jet stirring.
I.e. perform step S103, described high-titanium molten iron adds iron scale, and described high-titanium molten iron is entered
Row jet stirs, to reduce the Ti content in described high-titanium molten iron.
In the embodiment of the present application, described addition iron scale in described high-titanium molten iron, particularly as follows:
The iron scale of 3～6kg is added, wherein, in described iron scale in described high-titanium molten iron per ton
Content >=70% of ferrum oxide.
In specific implementation process, described iron scale can be the iron scale produced in rolling process, with
Cost-effective.
In the embodiment of the present application, described described high-titanium molten iron is carried out jet stirring, particularly as follows:
Spray gun is placed on the position of below described high-titanium molten iron liquid level 200～600mm, controls described spray gun
Jet stirs the duration of described high-titanium molten iron 30～90s, and wherein, total jet amount of described spray gun is institute per ton
State high-titanium molten iron jet 1～2m3。
In specific implementation process, the gas of described spray gun spray can be air or noble gas, does not limits at this
System.
Specifically, iron scale with the reactive chemistry formula of titanium can be:
2FeO+Ti→TiO2+2Fe
Specifically, in described high-titanium molten iron, add iron scale, and stir by force with the gas of spray gun ejection
Mix the mixture of described high-titanium molten iron and iron scale, owing to the titanium of iron scale with molten iron surface reacts,
Make the region Ti content near scum interface reduce, so make in molten iron the TiC near slag ferrum interface and
TiN content reduces, and the TiO that reaction generates2Easily enter in desulfurization slag, therefore advantageously reduce molten iron
Viscosity, beneficially slag sluicing system；Simultaneously because it is exothermic reaction that the titanium on iron scale and molten iron surface reacts,
The temperature at slag ferrum interface improves, and is beneficial to further reduce molten iron viscosity, beneficially slag sluicing system.
Subsequently, high-titanium molten iron is stood.
In the embodiment of the present application, the duration of described high-titanium molten iron 1～2min can be stood, so that in molten iron
Desulfurization slag fully float to high-titanium molten iron surface, in order to follow-up carry out second time skim.
Finally, carry out second time to skim.
I.e. perform step S104, described high-titanium molten iron is carried out second time and skims, to reduce described height further
Desulfurization slag in ferrotianium water.
Specifically, owing to being reduced the content of the titanium carbide in high-titanium molten iron by ferrum oxide, therefore slag
Ferrum separates easily, carries iron water amount when second time is skimmed low, after second time is skimmed, after skimming
The desulfurization quantity of slag on molten iron surface can control, at molten iron≤0.5kg per ton, to reach bright of more than 95%, energy
Enough it is prevented effectively from time sulfur that molten iron slag brings.
Below, the method provided according to the present invention, it is provided that the high-titanium molten iron of three kinds of different titaniferous amounts is carried out
The embodiment of slag sluicing system:
Embodiment one, before desulfurization, high-titanium molten iron composition quality percent is: C content is 4.30%, Si content
Being 0.38%, Mn content is 0.10%, and P content is 0.093%, and S content is 0.039, and Ti content is 0.12.
Molten iron temperature is 1348 DEG C.
Desulfurization is high-titanium molten iron per ton consumption granular magnesium 0.63kg during dusting, and after desulfurization, high-titanium molten iron becomes sub-prime
Amount percent is: C content is 4.28%, and Si content is 0.33%, and Mn content is 0.11%, and P content is
0.095%, S content is 0.003, and Ti content is 0.08, and molten iron temperature is 1329 DEG C.
Add lime particle on high-titanium molten iron surface, addition is high-titanium molten iron 4.5kg per ton, adds laggard
Row takes off slag operation for the first time, takes off the quantity of slag by percentage to the quality, in high-titanium molten iron the 60% of desulfurization slag total amount；
Skim for the first time after end, add the iron scale produced in rolling process to high-titanium molten iron upper surface,
In iron scale, iron oxide content is 83%, and addition is high-titanium molten iron 5kg per ton, afterwards use spray gun to
High-titanium molten iron blows air is stirred, and position of lances is 400mm, mixing time below high-titanium molten iron liquid level
For 60s, air-blowing quantity controls in high-titanium molten iron 2m per ton3；
After winding-up stirring terminates, high-titanium molten iron is stood 2min, then carries out taking off slag operation for the second time, remove height
The whole remaining desulfurization slag of ferrotianium water surface, the bright face that after skimming, high-titanium molten iron shows accounts for more than 95%, finally
Iron loss be molten iron 0.45kg per ton, the iron loss of molten iron 4kg per ton much smaller than in prior art, it is achieved that joint
About cost.
Embodiment two, before desulfurization, high-titanium molten iron composition quality percent is: C content is 4.16%, Si content
Being 0.42%, Mn content is 0.12%, and P content is 0.091%, and S content is 0.047, and Ti content is 0.15,
Molten iron temperature is 1326 DEG C.
Desulfurization is high-titanium molten iron per ton consumption granular magnesium 0.68kg during dusting, and after desulfurization, high-titanium molten iron becomes sub-prime
Amount percent is: C content is 4.18%, and Si content is 0.40%, and Mn content is 0.11%, and P content is
0.090%, S content is 0.002, and Ti content is 0.07, and molten iron temperature is 1325 DEG C.
Add lime particle on high-titanium molten iron surface, addition is high-titanium molten iron 5kg per ton, carries out after addition
Take off slag operation for the first time, take off the quantity of slag by percentage to the quality, in high-titanium molten iron the 70% of desulfurization slag total amount；
Skim for the first time after end, add the iron scale produced in rolling process to high-titanium molten iron upper surface,
In iron scale, iron oxide content is 76%, and addition is high-titanium molten iron 5kg per ton, afterwards use spray gun to
High-titanium molten iron blows air is stirred, and position of lances is 400mm, mixing time below high-titanium molten iron liquid level
For 65s, air-blowing quantity controls in high-titanium molten iron 2m per ton3；
After winding-up stirring terminates, high-titanium molten iron is stood 2min, then carries out taking off slag operation for the second time, remove height
The whole remaining desulfurization slag of ferrotianium water surface, the bright face that after skimming, high-titanium molten iron shows accounts for more than 95%, finally
Iron loss be molten iron 0.50kg per ton, the iron loss of molten iron 4kg per ton much smaller than in prior art, it is achieved that joint
About cost.
Before embodiment three, desulfurization, high-titanium molten iron composition quality percent is: C content is 4.33%, Si content
Being 0.31%, Mn content is 0.10%, and P content is 0.091%, and S content is 0.029, and Ti content is 0.11,
Molten iron temperature is 1337 DEG C.
Desulfurization is high-titanium molten iron per ton consumption granular magnesium 0.60kg during dusting, and after desulfurization, high-titanium molten iron becomes sub-prime
Amount percent is: C content is 4.22%, and Si content is 0.29%, and Mn content is 0.11%, and P content is
0.091%, S content is 0.004, Ti:0.05, and molten iron temperature is 1331 DEG C.
Add lime particle on high-titanium molten iron surface, addition is high-titanium molten iron 4kg per ton, carries out after addition
Take off slag operation for the first time, take off the quantity of slag by percentage to the quality, in high-titanium molten iron the 50% of desulfurization slag total amount；
Skim for the first time after end, add the iron scale produced in rolling process to high-titanium molten iron upper surface,
In iron scale, iron oxide content is 74%, and addition is high-titanium molten iron 6kg per ton, afterwards use spray gun to
High-titanium molten iron blows air is stirred, and position of lances is 400mm, mixing time below high-titanium molten iron liquid level
For 70s, air-blowing quantity controls in high-titanium molten iron 2m per ton3；
After winding-up stirring terminates, high-titanium molten iron is stood 2min, then carries out taking off slag operation for the second time, remove height
The whole remaining slag of ferrotianium water surface, the bright face that after skimming, high-titanium molten iron shows accounts for more than 95%, final ferrum
Damage as molten iron 0.40kg per ton, the iron loss of molten iron 4kg per ton much smaller than in prior art, it is achieved that save into
This.
Technical scheme in above-mentioned the embodiment of the present application, at least has the following technical effect that or advantage:
The slag sluicing system method of the high-titanium molten iron that the embodiment of the present application provides, first adds Calx in high-titanium molten iron
Granule is to converge the desulfurization slag on surface, and tentatively reduces the desulfurization slag on molten iron surface by skimming for the first time
Content, adds iron scale, by the reaction of ferrum oxide Yu titanium, reduces the content of titanium in molten iron, thus
Reduce titanium carbide and the content of titanium nitride, to reduce molten iron viscosity, beneficially slag sluicing system, simultaneously because oxygen
Change the titanium on iron sheet and molten iron surface reacting is exothermic reaction, and the temperature raising at slag ferrum interface is dropped further
Low molten iron viscosity, beneficially slag sluicing system, after slag sluicing system is easy, carries out second time and skim, reduce
The iron water amount carried in the desulfurization slag clawed, it is achieved that cost-effective technique effect.
Although preferred embodiments of the present invention have been described, but those skilled in the art once know base
This creativeness concept, then can make other change and amendment to these embodiments.So, appended right is wanted
Ask and be intended to be construed to include preferred embodiment and fall into all changes and the amendment of the scope of the invention.
Obviously, those skilled in the art can carry out various change and modification without deviating from this to the present invention
Bright spirit and scope.So, if the present invention these amendment and modification belong to the claims in the present invention and
Within the scope of its equivalent technologies, then the present invention is also intended to comprise these change and modification.
Claims (6)
1. the slag sluicing system method of a high-titanium molten iron, it is characterised in that including:
After carrying out described high-titanium molten iron spraying magnesium desulfurization, described high-titanium molten iron adds lime particle
To be polymerized the desulfurization slag in described high-titanium molten iron；
Carry out described high-titanium molten iron skimming, to reduce the desulfurization in described high-titanium molten iron for the first time
Slag；
In described high-titanium molten iron, add iron scale, and described high-titanium molten iron carried out jet stirring,
To reduce the Ti content in described high-titanium molten iron；
Described high-titanium molten iron carries out second time skim, to reduce taking off in described high-titanium molten iron further
Sulfur slag；
Described addition iron scale in described high-titanium molten iron, particularly as follows:
The iron scale of 3～6kg, wherein, described iron scale is added in described high-titanium molten iron per ton
Content >=70% of middle ferrum oxide.
2. the method for claim 1, it is characterised in that described add in described high-titanium molten iron
Enter lime particle, particularly as follows:
The lime particle of 3～6kg is added in described high-titanium molten iron per ton.
3. the method for claim 1, it is characterised in that described described high-titanium molten iron is carried out
Skim for the first time, particularly as follows:
Carry out described high-titanium molten iron skimming for the first time, total to remove the desulfurization slag in described high-titanium molten iron
The desulfurization slag of 50%～the 70% of amount, wherein, described desulfurization slag total amount is to skim described first time and institute
State the sum of clawed desulfurization slag of skimming for the second time.
4. the method for claim 1, it is characterised in that described described high-titanium molten iron is carried out
Jet stirs, particularly as follows:
Spray gun is placed on the position of below described high-titanium molten iron liquid level 200～600mm, controls described
Spray gun jet stirs the duration of described high-titanium molten iron 30～90s, wherein, total jet amount of described spray gun
For described high-titanium molten iron jet 1～2m per ton3。
5. method as claimed in claim 4, it is characterised in that described high-titanium molten iron is entered described
Before row second time is skimmed, also include:
Stand the duration of described high-titanium molten iron 1～2min.
6. the method as described in claim 1-5 is arbitrary, it is characterised in that in described high-titanium molten iron
Ti content >=0.05%.
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| CN104593538A (en) | 2015-05-06 |
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