CN107148482A - Mixture, the purposes of the mixture and the method for pre-processing the slag on the metal bath being present in Ferrous Metallurgy in metallurgical tank - Google Patents
Mixture, the purposes of the mixture and the method for pre-processing the slag on the metal bath being present in Ferrous Metallurgy in metallurgical tank Download PDFInfo
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- CN107148482A CN107148482A CN201580059266.6A CN201580059266A CN107148482A CN 107148482 A CN107148482 A CN 107148482A CN 201580059266 A CN201580059266 A CN 201580059266A CN 107148482 A CN107148482 A CN 107148482A
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- slag
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- carbon
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Classifications
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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
- C21C7/0025—Adding carbon material
-
- 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
- C21C7/0037—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 by injecting powdered material
-
- 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
- C21C7/0075—Treating in a ladle furnace, e.g. up-/reheating of molten steel within the ladle
-
- 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
- C21C7/0087—Treatment of slags covering the steel bath, e.g. for separating slag from the molten metal
-
- 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
-
- 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
- C21C7/0056—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 using cored wires
- C21C2007/0062—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 using cored wires with introduction of alloying or treating agents under a compacted form different from a wire, e.g. briquette, pellet
Abstract
A kind of method the present invention relates to mixture for being introduced into the slag being present in Ferrous Metallurgy on metal bath, the purposes of this mixture and for pre-processing the slag on the metal bath being present in Ferrous Metallurgy in metallurgical tank (such as converter, electric arc furnaces or ladle).
Description
The present invention relates to the mixture for being introduced into the slag being present in Ferrous Metallurgy on metal bath, this mixed
The purposes of compound, and be present in metallurgical tank in Ferrous Metallurgy for pre-processing (Konditionierung) and (for example turn
Stove, electric arc furnaces or ladle (Pfanne)) in metal bath on slag method.
In Ferrous Metallurgy, pig iron melt is separated with unwanted composition before casting.
If using converter, to this in the LD methods of most wide-scale distribution now, by jet pipe by oxygen top blast
(aufgeblasen), which is extremely located at, to be lined with the pig iron melt in the converter of basic refractory.This melts oxygen top blast to the pig iron
Process on body is also referred to as refining.In refining, accompanying element, particularly in the accompanying element of carbon, manganese, silicon and phosphorus form, quilt
The oxygen oxidation being blown into, and the molten slag layer floated on metal bath is formed together with the quick lime of incorporation.
In electric arc furnaces, raw steel melt by make scrap iron, the pig iron, liquid iron and/or iron sponge and other melting sources come
Produce.
The metal bath refined in primary metallurgical plant has after required property, and the metal bath is logical via discharge
Road, which is expelled in ladle, is used for secondary Metallurgical processing.
Slag must be targetedly impacted with regard to chemical property and physical property or is pretreated.
In order to pre-process slag, it is known that make slag equipped with so-called slag pretreating agent, so as to change slag
Property.
Therefore, it is initially acid or the basicity of the slag of non-alkaline, the i.e. basic component of slag and the quality of other components
Than or mol ratio (it can for example be calculated according to following formula：[xCaO+MgO]/[xSiO2+Al2O3+ other component]) it must improve,
To reduce slag to wherein there is the corrosion attack of the alkaline liner of the metallurgical tank of metal bath, and thus reduce liner
Wear and tear and increase its use time.Therefore, slag pretreating agent has the component for improving slag basicity, the component particularly stone
Ash, calcined dolomite in powder or dolomite.
In addition meaningfully, the content of the MgO in slag is set by adding slag pretreating agent so that it is molten
In the saturation range of MgO in slag, and thus reduce corrosion attack of the slag to liner.
It it may also be desirable to during ejection or after discharge, the slag stayed in after discharge in converter can be made easily to apply
To the refractory lining of converter.By the molten slag layer of the application, metal bath can be lowered to the corrosion attack of converter lining.Will be molten
Slag applies to the process of converter " maintenance " for being also referred to as converter.On the one hand known method for maintaining converter is so-called " molten
Slag-cleaning ", wherein making slag be distributed in discharge side and loading side by the rotation of converter.Another maintenance method is so-called
" slag-injection ", wherein slag carry out mechanical sprinkling by the nitrogen stream of jet pipe.Finally, in the feelings of so-called " slag-foaming "
Under condition, make slag chemical blowing by adding carbon carrier.The slag foamed in the case of slag-foaming be also referred to as " foam melt
Slag ".
In addition to maintaining converter by foamed slag, it also has effect beneficial in addition.I.e. foamed slag has exhausted
Edge property so that the heat loss from melt can be reduced and energy can be saved.In addition, wherein there is the group of the metallurgical tank of fusant
Part can be protected by foamed slag thermal radiation.
In order to produce foamed slag in electric arc furnaces, the carbon being blown into slag can burn into carbon monoxide by oxygen in addition,
And the CO gas needed for foaming is provided in this way.In the case of being the melting method in electric arc furnaces, molten slag layer
Foaming is important because the molten slag layer by volume increase come shielded arc, reduce to the radiation loss on furnace wall, improve extremely
The energy transfer of melt, and thus same saving energy.
In order to improve reactivity of the slag pretreating agent when it is introduced into slag, in principle will desirably there is provided
Mixture as fine-grained as possible, and be introduced into slag.Therefore, it is known to provide the slag pretreatment of fine-powdered
Agent so that these have high reactivity because of its high ratio surface.But, this slag provided in fine-powdered form is located in advance
The shortcoming of reason agent is particularly the complex process of the slag pretreating agent of this fine-powdered.Therefore, by known in the art, by fine powder
The slag pretreating agent of shape is compacted into pill first, and will be introduced into the pretreating agent of the form in slag.But, it is this
The shortcoming for being pressed into the slag pretreating agent of pill is probably, these decomposition that are only delayed in slag, and therefore slag is located in advance
Manage the reactivity reduction of agent.
As background, the present invention relates to a kind of slag pretreating agent is provided, the basicity and MgO- contents of slag are by it
Can quickly it improve, so as to reduce slag to there is the metallurgical tank of the metal bath with slag disposed thereon wherein
Refractory lining erosion.
Another object of the present invention is to provide a kind of slag pretreating agent, it has high reactivity and while have can
Being easily processed property.
Another object of the present invention is to provide a kind of slag pretreating agent, the foaming of slag can be realized by it.
Finally, another object of the present invention is to provide a kind of slag pretreating agent, primary metallurgy side can be realized by it
The raising of the iron yield of method.
In order to realize these purposes, according to the present invention is provided to be introduced into be present on metal bath in Ferrous Metallurgy
Mixture or slag pretreating agent in slag, mixture or the slag pretreating agent is comprising following mass ratio with the following group
Point：
Scope is 10 to 90 quality % unprocessed dolomite；
Scope is 90 to 10 quality % one or more of other components, and it comprises at least following component：MgO and carbon.
It is adapted for introduction into according to the mixture of the present invention or according to the slag pretreating agent of the present invention in any metallurgical tank
In metal bath on slag in, but the slag being used in particular in converter, electric arc furnaces and ladle.
Unless specified in addition in individual cases, otherwise all data represented herein with % are all in terms of quality %
Data, the gross mass respectively based on the mixture according to the present invention.
According to the present invention mixture in unprocessed dolomite ratio (its according to the present invention 10 to 90 quality % scope
It is interior) two main purposes achieve particularly according to the present invention.On the one hand, unprocessed dolomite is added suddenly when being contacted with hot slag
Heat, thus triggers the calcining of unprocessed dolomite.The calcining causes slag to foam so that will introduce molten according to the mixture of the present invention
Foamed slag is formed when in slag.But, on the other hand, as long as the mixture in the form of pill to be introduced into slag, it will mix
The calcining that thing is introduced into unprocessed dolomite when in slag also results in the spontaneous disintegration of mixture, and mixture is consequently formed with high reaction
The big ratio surface of property.Thus achieved according to the mixture of the present invention there is provided while not only in the form of pill, i.e., with can
Being easily processed property, also with high reactive mixture.
Due to the MgO and CaO ratio that are formed from unprocessed dolomite after its calcining, the basicity of slag is improved.Further, since
The MgO formed after unprocessed dolomite calcining ratio, can be achieved the MgO- saturations of slag so that smelting of the slag to receiving metal bath
The corrosion attack reduction of the refractory lining of golden container.Here, according to another advantage of the mixture of the present invention especially because should
The high reactivity of mixture, can particularly rapidly realize the MgO- saturations.
In addition to unprocessed dolomite, according to the mixture of the present invention also comprising one or more of other components, it is included
MgO and carbon.
The ratio of carbon in the other component is used to strengthen slag foaming when introducing a mixture into the slag.
This, when mixture is fed to slag, carbon reacts to form oxycarbide with the oxygen present in slag, particularly forms an oxygen
Change carbon (CO) and carbon dioxide (CO2).When introducing a mixture into slag, the carbon in the other component of the mixture is stood
I.e. and tempestuously by the oxygen partial oxidation of slag so that when introducing a mixture into slag, the slag spontaneously foams.
Therefore not only by when being introduced into slag the calcining of unprocessed dolomite also pass through the mixture when being introduced into slag
The reaction of carbon part causes slag to foam, and thus such as in the case where slag foams, slag highly increases and cover metallurgical appearance
The refractory lining of device.In electric arc furnaces, due to it is increased foaming slag volume, with respect to furnace wall arc radiation by partly or completely
Full-shield.Due to increased content of MgO, slag obtains required viscosity simultaneously, also to keep attached during and after foaming
In wall.
If mixture is directly contacted with metal bath, such as because being made by injection apparatus in slag layer open, mixture
Carbon can directly be reacted with the oxygen of metal bath and oxygen can be removed from metal bath.The oxygen removed from metal bath need not
Removed in a further step by deoxidier (such as aluminium) from metal bath again afterwards.
At least one of oxygen（Reacted by the carbon being introduced into according to the mixture of the present invention in slag）From in slag
Iron oxide, they are reduced into metallic iron by carbon.Which thereby enhance the yield of the iron refined in whole method.
Due to the ratio of the carbon in mixture, it on the one hand can therefore realize that slag foams.In addition, can improve in whole method
The yield of the iron of refinement.
The MgO of other component ratio is used in particular for, and can targetedly be set according to remaining component of mixture
The basicity and MgO- saturations of slag.
The component in unprocessed dolomite form of mixture be it is raw, i.e., it is natural, substantially undressed, particularly not
Dolomite through calcining.As known, unprocessed dolomite is containing essential mineral dolomite (CaMg (CO3)2Or CaCO3 • MgCO3)
Rock.Unprocessed dolomite generally has reaches at least 90 mass % dolomite based on unprocessed dolomite.In addition, may be present, for example with
Fe2O3、SiO2Or Al2O3Form natural impurity.According to the present invention it is preferred to use there are at least 90 matter based on unprocessed dolomite
Measure % dolomite ratio, the unprocessed dolomite particularly with least 91,92,93,94,95 or 96% dolomite ratio.
Unprocessed dolomite can be present in by 10 to 90 quality % ratio of scope in the mixture according to the present invention, i.e. for example
Also it is present in the mass % of at least 10,11,12,13,14 or 15 ratio in the mixture according to the present invention.For example, unprocessed dolomite
The mixture according to the present invention can be present in the mass % of at most 90,80,70,60,55,50,45,40,35,30 or 25 ratio
In.
At least one other component in addition to unprocessed dolomite that mixture is included can be, for example, in following components
One or more：Causticity magnesite (Magnesitkauster), magnesia-carbon (Magnesiakohlenstoff), burning
Tie magnesia, melt oxidation magnesium, graphite, coke, or one or more of carbide, such as aluminium carbide.If one or more of
Aforementioned component comprising MgO but not comprising carbon is present in the mixture according to the present invention (such as, causticity magnesite, sintering oxygen
Change magnesium or melt oxidation magnesium), then also there is at least another component comprising carbon (as such as component magnesia-carbon, graphite, Jiao
At least one of charcoal or at least one carbide).Correspondingly, if there are one or more comprising carbon but do not include MgO's
Aforementioned component (such as graphite, coke or at least one carbide), then mixture has at least another include MgO foregoing group
Divide (such as causticity magnesite, sintered magnesia or melt oxidation magnesium).
According to one preferred embodiment, the other component is in the form of magnesia-carbon and optionally at least with another
A kind of form of aforementioned component is present.
In a particularly preferred embodiment, the other component is in the form of magnesia-carbon and causticity magnesite
Form exist.
Magnesia-carbon is so-called magnesium carbon product, and it is also referred to as magnesia carbon brick or MgO-C- bricks, and is characterised by by magnesia
(MgO) particle for being made and being be combined with each other via carbon key.According to a particularly preferred embodiment, magnesia-carbon is to use
The form for the magnesium carbon product crossed is present, i.e., so-called fragmentation magnesia-carbon (Magnesiakohlenstoffausbruch).This
It is to have been used for the magnesium carbon product in steel and iron industry to plant fragmentation magnesia-carbon, especially as in oxygen furnace steel converter, electric arc furnaces
Or the abrasion lining in ladle.In this respect, the magnesium carbon product accordingly reclaimed can partly, largely or be made exclusively for
Magnesia-carbon is present in the mixture according to the present invention.In this respect, the invention further relates to the magnesium carbon product of recovery as with
It is pre- as the slag according to the present invention in the purposes of the raw material of the mixture according to the present invention, or the magnesium carbon product of this recovery
The purposes of the component of inorganic agent.According to the present invention it has proven convenient that being used as the carbon in the mixture according to the present invention using magnesia-carbon
Carrier may be particularly advantageous, particularly as long as magnesia-carbon (if being particularly used as fragmentation presence) can be with metallurgy melting container
The composition of refractory lining is approached, and therefore when forming foamed slag, particularly effectively can contribute to interior by foamed slag
The maintenance of lining.
Caustic magnesia (Magnesiakauster) is the magnesite calcined through causticity, and it is otherwise referred to as causticity magnesite
Ore deposit (Kaustermagnesit) or corrosive oxidation magnesium.As known, causticity magnesite passes through magnesite (MgCO3) causticity forge
Burn and obtain, i.e., obtained by calcined magnesite at low temperature.The excellent of causticity magnesite is used in the mixture according to the present invention
Point, which is particularly it, has high reactivity, therefore it can particularly rapidly discharge MgO when being introduced into slag, and therefore can be special
The raising of the basicity and its MgO- saturation of slag is not realized rapidly.
If existing it has proven convenient that mixture comprising following mass ratio is in magnesia-carbon and causticity magnesite according to the present invention
The other component of form, then according to the present invention mixture there is particularly advantageous property, especially with regard to its reactivity and
It is used as the effect of the reagent for making slag foaming：Magnesia-carbon：10 to 50 quality %；Causticity magnesite：10 to 50 quality %.
Here, can according to present invention provide that, only one kind in the aforementioned component of foregoing mass ratio is present in mixture.
Magnesia-carbon for example can be present in mixture with the mass % of at least 10,15,20,25,30 or 35 ratio.Separately
Outside, magnesia-carbon for example can be present in mixture with most 45 or 40 mass % ratio.
Causticity magnesite for example can be present in mixture with the mass % of at least 10,15,20,25,30 or 35 ratio.Separately
Outside, causticity magnesite for example can be present in mixture with most 50 or 45 mass % ratio.
It is preferred that providing, mixture exists with relatively small particle size, such as up at least 50 mass %, 60 mass %, 70 matter
Measure %, 80 mass %, 90 mass % or even exist up to 100 mass % with 5 below mm particle size.
For example it could dictate that, unprocessed dolomite reaches at least 80 mass %, i.e., for example, also for up at least 90 mass % or up to 100 mass %
Exist with 5 below mm particle size.
The other component, if particularly these exist in the form of magnesia-carbon and causticity magnesite, preferably reaches
At least 80 mass %, i.e., for example, being also to exist up at least 90 mass % or up to 100 mass % with 1 below mm particle size.
By the way that there is the very small average particle size particle size according to the mixture of the present invention, mixture can be achieved in slag
Especially good and uniform distribution and particularly also quickly dissolving.
In order to realize the good processing (although the small particle size of mixture) of the mixture according to the present invention,
It could dictate that, the form that the mixture can be compressed or suppressed is provided, such as provided in the form of pill.It is in ball-shape to provide
The mixture of formula, could dictate that, not added according to the mixture (it can especially have foregoing particle size distribution) of the present invention
Pill is pressed into the case of doping.
For example, these pills can have almond-shaped, bar-shaped or spherical, for example, with such as 50 mm, 40 mm or 30 mm
Maximum length.The pill can also have, the mm of such as 5,10,15,20 or 25 minimum diameter.Ball with corresponding size
Grain can be easily processed, but still be small enough so that they feed into slag rear fater disintegration wherein simultaneously, and according to the present invention
The advantage of small particle size distribution can be in that fast-acting.
As discussed above, when introducing a mixture into slag, the spontaneous calcining of unprocessed dolomite causes pill in slag is introduced into
Shi Zifa is disintegrated, and therefore have high ratio surface and small particle size with this adjoint high reactive mixture or
Big grain fineness is instantly available performance.
Mixture can have a certain proportion of magnesium carbonate (MgCO3), such as with 5 to 30 quality % scope, i.e., for example also it is
The mass % of at least 6,7,8 or 9 ratio, and such as at most 25,20 or 15 mass % ratio.The ratio of magnesium carbonate in mixture
Mainly or entirely can exist as the composition of unprocessed dolomite.
Calcium carbonate (CaCO in mixture3) ratio for example can be in the range of 5 to 35 quality %, i.e., for example also for extremely
Few 6,7,8,9,10 mass %, and be for example also at most 30,25,20 or 15 mass %.The ratio of calcium carbonate in mixture can be led
Or to exist entirely as the composition of unprocessed dolomite.
The ratio of magnesia (MgO) in mixture, for example can be in the range of 20 to 60 quality %, i.e., for example also for extremely
Few 25,30,35,40 or 45 mass %, and be for example also at most 55 or 50 mass %.Magnesia for example can be aoxidized especially in component
Exist in magnesium-carbon and causticity magnesite.
Carbon for example can be present in by 3 to 15 quality % ratio of scope in the mixture according to the present invention, i.e., for example, also
With the mass % of at least 4,5 or 6 ratio, and for example, also with the mass % of at most 14,13,12,11 or 10 ratio.Carbon can mainly or
Component completely in the form of magnesia-carbon is present in mixture.
The calcium oxide (CaO) that can be for example introduced into as the submember of causticity magnesite in mixture can for example using scope as
0 to 40 quality % ratio is present in mixture, i.e., for example also with the mass % of at least 5,10 or 15 ratio, and for example also so that
The mass % of many 35,30,25 or 20 ratio.
Other material, such as SiO2、Fe2O3、Al2O3、H2O or P2O5It can be introduced as impurity via the component of mixture
In the mixture.Here, these materials for example can be present in mixture with following ratio, the ratio of wherein these materials can
Individually or with any combinations it is present in following ratio in mixture：
SiO2：0 to 10 quality %, i.e., for example also with least 0.5 or 1 mass % ratio, and for example with most 9,8,7,6,5,4,3
Or 2 mass % ratio；
Fe2O3：0 to 10 quality %, i.e., for example also with least 0.5 or 1 mass % ratio, and for example with most 9,8,7,6,5,4,
3 or 2 mass % ratio；
Al2O3：0 to 5 quality %, i.e., for example also with least 0.5 or 1 or 1.5 or 2 mass % ratio, and for example with most 4,3 or
2.5 mass % ratio；
H2O：0 to 3 quality %, i.e., for example also with least 0.5 or 1 mass % ratio, and for example with most 2 or 1 mass % ratio
Example；
P2O5：0 to 0.5 quality %.
According to the present invention it has proven convenient that mixture very sensitively can react to other component and material.In this side
Face, could dictate that, in addition in the component of raw magnesite, magnesia-carbon and causticity magnesite form, according to the mixture of the present invention
Also there is the other component of each ratio of below 10 mass % ratio, i.e., for example also with 9,8,7,6,5,4,3,2 or 1 mass %
Following ratio.It could dictate that, except above-mentioned substance MgCO3、CaCO3、MgO、C、CaO、SiO2、Fe2O3、Al2O3、H2O、P2O5（It is special
It is not with above-mentioned mass ratio）Outside, mixture also has the other material of only below 10 mass % ratio, i.e., for example also with
9th, below 8,7,6,5,4,3,2 or 1 mass % ratio.
In order to provide the mixture according to the present invention in the form of pill according to the present invention, it could dictate that, mixture is pressed at it
It is made before pill and adhesive mix.The adhesive based on sulfate (sulfatisches) is for example could dictate that, for example, Epsom salts are molten
Liquid.The concentration of Epsom salts in Epsom salts solution can be for example in the range of 0.1 to 0.3 quality %.It could dictate that, based on without adhesive
Mixture, the mixture and scope for 5 to 15 quality % ratio adhesive mix.
In order to improve the raw embryo intensity of pill, it can dictate otherwise, mixture also includes one or more of temporary adhesion agent,
Such as one or more in following temporary adhesion agent：Glucose, starch, one or more of bondings based on silicate
Agent is one or more of based on phosphatic adhesive.
It is present in the invention further relates to a kind of for pre-processing in Ferrous Metallurgy on the metal bath in metallurgical tank
The method of slag, the described method comprises the following steps：
Mixture according to the present invention is provided；
The mixture is introduced into the slag on the metal bath being present in metallurgical tank.
As described herein, therefore mixture also can for example be compressed or pressed form is provided, such as in the form of pill
There is provided.
Here, the mixture can be mixed with one or more of adhesives specifically described herein, and it is subsequently compressed into ball
Grain, the particularly pill with size specifically described herein.
The mixture for example provided with pellet form is supplied to slag and settled into wherein so that it can send out there
Wave its effect according to the present invention.
According to the present invention mixture be suitable as in principle in any metallurgical tank metal bath (for example for turn
Metal bath in stove, electric arc furnaces or ladle) on slag slag pretreating agent.It is especially excellent according to the mixture of the present invention
From the slag pretreating agent for making the slag on this metal bath, the metal bath is present in alkaline liner (i.e.
It is based particularly on the liner of at least one of following material：Magnesia, magnesia-carbon, dolime or dolime-
Carbon) metallurgical tank in.
It is used to pre-process the invention further relates to the mixture specifically described herein according to the present invention and exists in Ferrous Metallurgy
The purposes of the slag on metal bath in metallurgical tank.
Here, the purposes can be realized as disclosed herein.
All features of the invention disclosed herein arbitrarily can be combined each other either individually or in combination.
The present invention is explained in greater detail by following examples.
In embodiment, the mixture with the following components according to table 1 is provided first.
| Component | Mass ratio [%] |
| Unprocessed dolomite | 22 |
| Magnesia-carbon | 40 |
| Causticity magnesite | 38 |
Table 1
Based on unprocessed dolomite, the unprocessed dolomite used has the dolomite of more than 95 mass % ratio.Especially, Al2O3、
Fe2O3And SiO2Exist as submember.
It is the fragmentation material in the magnesium carbon object form reclaimed in the component of magnesia-carbon form.Except main component MgO
Outside, the gross mass based on the component, the carbon of these components also ratio with 28 mass %.
Unprocessed dolomite exists with 5 below mm particle size, and magnesia-carbon and causticity magnesite component with 1 mm with
Under particle size exist.
Based on the quality of the mixture without adhesive, mixture and 10% adhesive in Epsom salts solution form are mixed
Close, and be pressed into the almond-shaped pill with about 15 mm thickness and about 30 mm length.
Then, pill is dried at about 300 DEG C, and provides pre-processed as slag in this manner after the cooling period
Agent.
Claims (7)
1. a kind of mixture for being introduced into Ferrous Metallurgy in the slag being present on metal bath, the mixture include with
The following components of lower mass ratio：
1.1 scopes are 10 to 90 quality % unprocessed dolomite；
1.2 scopes are 90 to 10 quality % one or more of other components, and it comprises at least following component：
1.2.1 MgO and
1.2.2 carbon.
2. mixture according to claim 1, it has the unprocessed dolomite for the ratio that scope is 10 to 55 quality %.
3. according to described mixture at least one of in preceding claims, wherein the other component with magnesia-carbon and
The form of causticity magnesite is present.
4. the mixture according at least one in preceding claims, wherein the mixture includes following mass ratio
In magnesia-carbon and the other component of causticity magnesite form：
Magnesia-carbon：10 to 50 quality %；
Causticity magnesite：10 to 50 quality %.
5. the mixture according at least one in preceding claims, the mixture exists with pellet form.
6. the method for pre-processing the slag being present in Ferrous Metallurgy on the metal bath in metallurgical tank, methods described
Comprise the following steps：
6.1 provide the mixture according at least one in preceding claims；
6.2 are introduced into the mixture in the slag on the metal bath being present in the metallurgical tank.
7. it is used to pre-process according to the mixture of at least one in claim 1 to 5 and is present in metallurgical tank in Ferrous Metallurgy
In metal bath on slag purposes.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP14198439.3 | 2014-12-17 | ||
| EP14198439.3A EP3034633B1 (en) | 2014-12-17 | 2014-12-17 | Mixture, use of this mixture as well as method for conditioning a slag on molten metal from the processing of iron and steel in a metallurgical vessel |
| PCT/EP2015/071607 WO2016096178A1 (en) | 2014-12-17 | 2015-09-21 | Mixture, use of said mixture and process for conditioning a slag located on a metal melt in a metallurgical vessel in iron and steel metallurgy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107148482A true CN107148482A (en) | 2017-09-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201580059266.6A Pending CN107148482A (en) | 2014-12-17 | 2015-09-21 | Mixture, the purposes of the mixture and the method for pre-processing the slag on the metal bath being present in Ferrous Metallurgy in metallurgical tank |
Country Status (12)
| Country | Link |
|---|---|
| US (1) | US20170275714A1 (en) |
| EP (1) | EP3034633B1 (en) |
| CN (1) | CN107148482A (en) |
| AR (1) | AR102499A1 (en) |
| BR (1) | BR112017009332A2 (en) |
| ES (1) | ES2623457T3 (en) |
| HU (1) | HUE034189T2 (en) |
| PL (1) | PL3034633T3 (en) |
| RU (1) | RU2017112347A (en) |
| SI (1) | SI3034633T1 (en) |
| TW (1) | TW201623189A (en) |
| WO (1) | WO2016096178A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10781499B2 (en) * | 2018-01-17 | 2020-09-22 | Air Products And Chemicals, Inc. | Bottom stirring tuyere and method for a basic oxygen furnace |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1796577A (en) * | 2004-11-17 | 2006-07-05 | Ism有限公司 | A slag conditioner composition, process for manfacture and method of use in steel production |
| CN103352100A (en) * | 2013-07-23 | 2013-10-16 | 山东莱钢永锋钢铁有限公司 | Raw rauhkalk steelmaking method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994019496A1 (en) * | 1993-02-23 | 1994-09-01 | Laporte Group Australia Limited | Insulating/metallurgical composite and method of manufacturing same |
| DE10323505A1 (en) * | 2003-05-24 | 2004-12-09 | Sms Demag Ag | Process for producing a foam slag on high-chromium melts in an electric furnace |
| US20070266824A1 (en) * | 2006-05-19 | 2007-11-22 | Stein Joseph L | Using a slag conditioner to beneficiate bag house dust from a steel making furnace |
-
2014
- 2014-12-17 EP EP14198439.3A patent/EP3034633B1/en not_active Not-in-force
- 2014-12-17 PL PL14198439T patent/PL3034633T3/en unknown
- 2014-12-17 HU HUE14198439A patent/HUE034189T2/en unknown
- 2014-12-17 SI SI201430198A patent/SI3034633T1/en unknown
- 2014-12-17 ES ES14198439.3T patent/ES2623457T3/en active Active
-
2015
- 2015-09-21 WO PCT/EP2015/071607 patent/WO2016096178A1/en active Application Filing
- 2015-09-21 US US15/529,344 patent/US20170275714A1/en not_active Abandoned
- 2015-09-21 CN CN201580059266.6A patent/CN107148482A/en active Pending
- 2015-09-21 RU RU2017112347A patent/RU2017112347A/en not_active Application Discontinuation
- 2015-09-21 BR BR112017009332A patent/BR112017009332A2/en not_active Application Discontinuation
- 2015-11-03 AR ARP150103544A patent/AR102499A1/en unknown
- 2015-11-10 TW TW104137004A patent/TW201623189A/en unknown
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1796577A (en) * | 2004-11-17 | 2006-07-05 | Ism有限公司 | A slag conditioner composition, process for manfacture and method of use in steel production |
| CN102061359A (en) * | 2004-11-17 | 2011-05-18 | Ism有限公司 | A slag conditioner composition, process for manufacture and method of use in steel production |
| CN103352100A (en) * | 2013-07-23 | 2013-10-16 | 山东莱钢永锋钢铁有限公司 | Raw rauhkalk steelmaking method |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2016096178A1 (en) | 2016-06-23 |
| US20170275714A1 (en) | 2017-09-28 |
| PL3034633T3 (en) | 2017-08-31 |
| AR102499A1 (en) | 2017-03-01 |
| EP3034633A1 (en) | 2016-06-22 |
| ES2623457T3 (en) | 2017-07-11 |
| HUE034189T2 (en) | 2018-02-28 |
| EP3034633B1 (en) | 2017-03-15 |
| TW201623189A (en) | 2016-07-01 |
| SI3034633T1 (en) | 2017-06-30 |
| BR112017009332A2 (en) | 2017-12-19 |
| RU2017112347A (en) | 2018-10-11 |
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