CN107245546B - A kind of preparation method of agent for purifying molten steel - Google Patents
A kind of preparation method of agent for purifying molten steel Download PDFInfo
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- CN107245546B CN107245546B CN201710389684.2A CN201710389684A CN107245546B CN 107245546 B CN107245546 B CN 107245546B CN 201710389684 A CN201710389684 A CN 201710389684A CN 107245546 B CN107245546 B CN 107245546B
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/06—Metallic powder characterised by the shape of the particles
- B22F1/065—Spherical particles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
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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
- C21C7/0037—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 by injecting powdered material
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Abstract
The invention discloses a kind of preparation methods of agent for purifying molten steel, belong to net steel smelting technical field.Of the invention is mixed to get cleanser mixture for active principle and bonding component, and wherein active principle and the mass ratio of bonding component are (5~10): 1；The active principle includes metallic aluminium, pulverized limestone, carborundum powder, titanium dioxide and biomass；The adhesive component includes kaolin and sulfonated phenol formaldehyde resin；The bonding of cleanser mixture, granulation obtain granular cleanser under the action of cuber or pelletizer, spare after dry, cooling.Cleanser cleanser prepared by the present invention reduces oxygen content in molten steel, and the CO gas of reaction generation promotes the floating removal of field trash, promote steel inclusion removing, it is smaller by inclusion size remaining in this cleanser treated molten steel, be evenly distributed, by the mating reaction of active principle and bonding component, the clean-up effect of molten steel can be improved.
Description
Technical field
The invention belongs to clean steel technical field of smelting, more specifically to a kind of preparation method of agent for purifying molten steel.
Background technique
The performance of steel depends primarily on the chemical component and tissue of steel.The presence of steel inclusion, destroys steel matrix
Continuity causes the inhomogeneities of the tissue of steel, to the ductility of steel, intensity, toughness, fatigue behaviour, finish, corrosion resistance
Energy, welding performance and electromagnetic performance can all have a huge impact.It also will cause nozzle clogging, nozzle clogging in continuous casting process
Have a great impact to the production and slab quality of continuous casting process.Therefore, steel research person in various countries' puts into larger energy and is dedicated to
The research of steel inclusion removal, also achieves huge achievement in terms of research in terms of field trash.
To the removal of field trash, generally there are two aspects both at home and abroad: first is that Countermeasures, second is that being carried out to field trash
Modification.Technology controlling and process is the technique by optimization steel in process of production, to reduce the content of steel inclusion.Turning
The oxygen content of converter terminal is reduced in furnace smelting process, reduces the lower quantity of slag, ladle argon-blown is carried out in refining process, continuous casting process
The middle content that steel inclusion is reduced using molding casting.In addition, both at home and abroad steel mill continuously improving always to field trash into
Row modification, the cleanliness of Lai Tigao steel；But cleanser is limited to molten steel purifying effect, urgent need is developed a kind of completely new
Agent for purifying molten steel.
Through retrieving, the patent of invention of Publication No. CN103642989A propose a kind of agent for purifying molten steel (applying date:
2013-11-21), the parts by weight of each component are respectively as follows: CaO:57~63 part, Al2O3: 31~36 parts, SiO2: 5~10 parts,
CaF2: 6~8 parts, MAI:4~11 part, 3~40 parts of deoxidier.The invention improves the mobility of clinker, purifies to a certain extent
Molten steel, reduces inclusion content in molten steel, but the invention scheme is not modified processing to field trash, does not reduce micro- in steel
The fusing point of thin field trash, cannot promote growing up, float, removing for field trash well, be unfavorable for further increasing steel product
Quality.
In addition, the title of innovation and creation are as follows: the molten steel scavenger and production method of a kind of composite sphere form (application number:
The 201410715201.X applying date: 2014-11-28), molten steel scavenger takes the form of a kind of composite sphere, composite sphere by
Pelletizing core and shell are constituted, and pelletizing core is metal material, shell is carbonate, pelletizing core mainly by silicon, manganese, aluminium alloyed powder
Mixture is constituted, and shell is mainly by calcium carbonate, magnesium carbonate, sodium carbonate, calcium oxide, one kind of magnesia or mixing no more than three kinds
Object is closed to constitute.The present invention reduces entire oxygen content in the steel content, improves steel product quality, cannot promote well the growing up, float of field trash,
Removal, is unfavorable for further increasing the quality of steel product.
Summary of the invention
1. technical problems to be solved by the inivention
It is an object of the invention to overcome in the prior art, existing cleanser is limited to the clean-up effect of molten steel not
Foot, provides a kind of preparation method of agent for purifying molten steel, by the way that the bonding of cleanser mixture, granulation are obtained granular purification
Agent, the mating reaction of active principle and bonding component, can improve the clean-up effect of molten steel, further, can promote to press from both sides
Sundries grows up, floats, removing, and then improves molten steel cleanness.
2. technical solution
In order to achieve the above objectives, technical solution provided by the invention are as follows:
Active principle and bonding component are mixed to get cleanser and mixed by a kind of preparation method of agent for purifying molten steel of the invention
Material is closed, wherein active principle and the mass ratio of bonding component are (5~10): 1；The active principle includes metallic aluminium, lime
Powder, carborundum powder, titanium dioxide and biomass；The adhesive component includes kaolin and sulfonated phenol formaldehyde resin；In cuber
Or the bonding of cleanser mixture, granulation obtain granular cleanser under the action of pelletizer, it is spare after dry, cooling.
Preferably, the specific steps are as follows:
Step 1: preparation bonding component
It takes bonding component dry in drying box, stirs 15~20min in stirrer for mixing after the completion of drying, mixing is equal
It is even to obtain bonding component；
Step 2: active principle is prepared
It takes active principle dry in drying box, stirs 25~30min in stirrer for mixing after the completion of drying, mixing is equal
It is even to obtain active principle；
Step 3: cleanser mixture
Bonding component is added in the blender of active principle, mixing is completed to be purified agent mixture；
Step 4: granulation
Cleanser mixture is added in cuber or pelletizer, and sprays water into cleanser mixture, cleanser is mixed
Under the action of closing material mechanical force, the bonding of cleanser mixture, granulation obtain granular cleanser, and are filtered out with round-hole mesh
Cleanser particle is dried to obtain cleanser by the cleanser that grain diameter is 5~10mm in drying box, after cooling that cleanser is close
Envelope is stand-by.
Preferably, it will be kept the temperature at cleanser in confined conditions 70-80 DEG C in step 4；Then by cleanser particle dry
Cleanser is dried to obtain in dry case.
Preferably, active principle further includes graphite powder, red beautiful soil and magnesium-manganese alloy.
Preferably, the active principle is formed according to following mass parts:
Preferably, the bonding component further includes starch and oil-sand.
Preferably, the bonding component is formed according to following mass parts:
Preferably, the active principle and the mass ratio of bonding component are (5~8): 1.
Preferably, the Al content in the metallic aluminium is greater than 92%.
3. beneficial effect
Using technical solution provided by the invention, compared with existing well-known technique, there is following remarkable result:
(1) preparation method of a kind of agent for purifying molten steel of the invention, by obtaining the bonding of cleanser mixture, granulation
Granular cleanser, the mating reaction of active principle and bonding component can promote steel inclusion removing and will not be to molten steel
Secondary pollution is generated, it is smaller by inclusion size remaining in this cleanser treated molten steel, be evenly distributed, and the folder of remaining
Sundries passes through denaturation treatment substantially, by the mating reaction of active principle and bonding component, can improve the purification effect of molten steel
Fruit；
(2) preparation method of a kind of agent for purifying molten steel of the invention, the grain diameter of the cleanser being prepared is 5~
10mm improves contact of the cleanser particle with molten steel, mixed effect reduces steel in molten steel under each component collective effect
Oxidisability in liquid, can effectively facilitate in molten steel field trash removing and inclusion conditioning, high-melting-point field trash can be to eutectics
Point field trash transformation, is conducive to the removal of field trash, remaining field trash passes through denaturation treatment, will not be to steel product performance
It has an impact, to improve the quality of molten steel；
(3) preparation method of a kind of agent for purifying molten steel of the invention, (FeO+MnO) in refining slag be prepared it is net
The Fe and Mn that agent reaction generates enter molten steel, Al by slag interface2O3、SiO2It is refined slag absorption, to reduce refining slag
Oxidation to molten steel.In clean steel smelting process, silicon carbide can in molten steel dissolved oxygen and oxide react, reduce steel
Oxygen content in liquid, and the CO gas for reacting generation reduces the generation of solid-oxide, CO gas, which floats to remove, stirs molten steel
The effect of mixing further promotes the floating removal of field trash；
(4) preparation method of a kind of agent for purifying molten steel of the invention, the addition for the cleanser being prepared can make exhausted big portion
The calcium aluminate for dividing solid tufted alumina inclusion to become low melting point richness CaO low melting point is mingled with, and reduces dystectic tufted in steel
Al2O3The content being mingled with, and then by high-melting-point brittleness Al2O3It is mingled with through the modified field trash for generating low melting point, promotes field trash
It floats, and easy agglomeration MnS is mingled with and is partly or entirely modified to tiny CaS and is mingled with, thus cleaning molten steel.
Detailed description of the invention
Fig. 1 is embodiment 1-5 total oxygen content variation diagram.
Fig. 2 is a kind of flow chart of the preparation method of agent for purifying molten steel of the invention.
Specific embodiment
Hereafter to the detailed description of exemplary embodiment of the present invention with reference to attached drawing, which forms one of description
Point, it has been shown as example enforceable exemplary embodiment of the invention in the figure.Although these exemplary embodiment quilts
Sufficiently describe in detail so that those skilled in the art can implement the present invention, it is to be understood that can realize other embodiments and
Can without departing from the spirit and scope of the present invention to the present invention various changes can be made.Hereafter to the embodiment of the present invention
More detailed description is not limited to required the scope of the present invention, and just to be illustrated and do not limit pair
The description of the features of the present invention and feature to propose to execute best mode of the invention, and is sufficient to make those skilled in the art
It can implement the present invention.Therefore, the scope of the invention is only defined by the appended claims.
Hereafter detailed description of the present invention and example embodiment are more fully understood in combination with attached drawing, wherein of the invention
Element and feature are identified by appended drawing reference.
Embodiment 1
The cleanser of the present embodiment is graininess, and cleanser is form of spherical particles, and particle diameter is 5~10mm；Cleanser
Including active principle and bonding component, the mass ratio of active principle and bonding component is (5~10): 1, the preferred 8:1 of the present embodiment,
Active principle includes metallic aluminium, pulverized limestone, carborundum powder, titanium dioxide and biomass, and active principle presses following mass parts gold
50~70 parts of aluminium of category, 20~40 parts of pulverized limestone, 5~20 parts of titanium dioxide, 5~15 parts of carborundum powder, 2~4 parts of biomass, this reality
Apply example choosing: metallic aluminium 60kg, pulverized limestone 30kg, titanium dioxide 18kg, carborundum powder 15kg, biomass 3kg.
It is worth noting that: each component in active principle is powdery, and granularity≤0.1mm, i.e. metallic aluminium, lime
Powder, titanium dioxide, carborundum powder are powdery, and granularity≤0.1mm of metallic aluminium, pulverized limestone, titanium dioxide, biomass, carbonization
Granularity≤0.05mm of silicon powder.It is worth noting that: the biomass of the present embodiment is that grain, fruit are removed in agriculture and forestry production process
During the lignocellulosics such as stalk, trees in addition, farming industry leftover bits and pieces, agriculture and forestry organic waste material and Animal husbandry production
Fowl and animal excrement and waste.
Al content in the metallic aluminium of the present embodiment is greater than 92%, the present embodiment 93%；The lime of the present embodiment is to live
Property lime, be that the crystal grain that obtains in 1100 DEG C of calcination temperature is small, porosity is high, bulk density is small lime, and this implementation
The activity degree of lime used by example is in 330ml/4N-HCl.Carborundum powder is by silicon and carbon with the nonmetallic of Covalent bonding together
Carbide.
The adhesive component of the present embodiment includes kaolin and sulfonated phenol formaldehyde resin, and adhesive component is formed by following mass parts:
60~80 parts of kaolin, 20~40 parts of sulfonated phenol formaldehyde resin；The present embodiment choosing: kaolin 70kg, sulfonated phenol formaldehyde resin 30kg.
Cleanser is added in molten steel (cleanser is added in RH refining furnace in the present embodiment), cleanser is to molten steel purifying
Reaction mechanism may be as follows: refine in latter stage refining slag that (FeO+MnO) content is probably 1~3%, as FeO, MnO in slag
When content is higher, non-metallic inclusion will be generated, is unfavorable for improving the cleanliness of molten steel.In clean steel smelting process, to subtract
The generation of (FeO+MnO) and alloying element oxidation reaction in molten steel in few refining, it is therefore necessary to further decrease refining slag
Oxidisability.Cleanser is added in molten steel, following react can occur in molten steel for cleanser:
Al+3/2 (FeO)=1/2 (Al2O3)+3/2[Fe]
Al+3/2 (MnO)=1/2 (Al2O3)+3/2[Mn]
SiC+3 (FeO)=SiO2+CO↑+3[Fe]
SiC+3 [O]=SiO2+CO↑+3[Fe]
3(TiO2)+C=[Ti3O5]+CO
(FeO+MnO) in refining slag reacts the Fe generated and Mn with cleanser and enters molten steel, Al by slag interface2O3、
SiO2It is refined slag absorption, to reduce oxidation of the refining slag to molten steel.In clean steel smelting process, silicon carbide can in molten steel
Dissolved oxygen and oxide react, reduce molten steel in oxygen content, and react generate CO gas reduce solid-oxide
Generation, CO gas float removal to the stirring action of molten steel further promotes field trash floating remove.Moreover, in steel slag
Oxide promote at high temperature and oxidizing biomass and sulfonated phenol formaldehyde resin decompose and generate H2、CH4, CO, and biomass reverse Ying Su
Degree rapidly, promotes the progress of subsequent reactions, improves the efficiency of reaction；H2、CH4[O] in slag can be reacted, thus directly
[O] content in molten steel is reduced, and reduces the generation of deoxidation type inclusion, the gas of generation is stirred molten steel, and
Small vacuum chamber is formed in molten steel, to promote the floating of field trash, improves the cleanliness of molten steel；And in adhesion component
Sulfonated phenol formaldehyde resin can improve the clean-up effect of molten steel in promotor of the later period as agitation of molten steel.And it can in biomass
With TiO2Reaction, the Ti that above-mentioned reaction generates3O5It is the atomic group of stable big ionic radius, other field trashes can be adsorbed,
It easily floats and is refined slag Adsorption.In addition, the present invention carries out denaturation treatment to field trash by using pulverized limestone, pulverized limestone exists
It is more more stable than calcium metal at a temperature of steel-making, and do not allow it is volatile, do not decompose, and the molten steel due to caused by blowing process will not be generated
Nitrogen pick-up can still keep total oxygen content after deoxidation lower in the original very high situation of molten steel oxygen gesture.
The addition of pulverized limestone can make most solid tufted alumina inclusions become the aluminic acid of low melting point richness CaO low melting point
Calcium is mingled with, and reduces dystectic tufted Al in steel2O3The content being mingled with, and then by high-melting-point brittleness Al2O3It is mingled with and passes through modification
Generate the field trash of low melting point, promote inclusion floating, and easy agglomeration MnS is mingled with partly or entirely be modified to it is tiny
CaS is mingled with, so that cleaning molten steel, improves steel product quality.Scavenger metal aluminium of the invention, carborundum powder, biomass can drop
Oxidisability in low molten steel and slag, and the gas that carborundum powder, biomass reverse should generate is stirred molten steel, promotes molten steel
In inclusion floating, promote steel inclusion float up to slag interface, at the same time cleanser to the field trash in molten steel into
Row is modified, and under cleanser each component collective effect of the present invention, has been reduced the oxidisability in molten steel, can have been effectively facilitated molten steel
Middle field trash removing and inclusion conditioning, modified field trash become multilayered sphere, and field trash is tiny and is evenly distributed, high
Melting point inclusions can change to lower melting point inclusion, be conducive to the removal of field trash, and molten steel under the action of Gas Stirring
Middle remaining inclusion size is smaller, is evenly distributed, and the field trash of remaining passes through denaturation treatment substantially, will not be to steel product
Performance has an impact, so that the quality of molten steel is improved, the total oxygen content after detection is modified in molten steel, and record such as 1 institute of table
Show, data variation is as shown in Figure 1.
Not more using the steel inclusion quantity of cleanser, field trash type is mainly dystectic tufted Al2O3Folder
Miscellaneous, inclusion size accounts for 70% or more greater than 3 μm, account for field trash total amount 20% or so greater than 10 μm.Through molten steel purifying
The amount of inclusions after agent processing in steel is less, and inclusion size is smaller, and size accounts for field trash total amount 80%, folder less than 3 μm
Sundries type is mainly magnesium aluminate spinel and Silicate inclusion object, the Al of individualism in steel2O3It is mingled with less.Experimental study
Show to significantly reduce using agent for purifying molten steel treated inclusion content of steel, steel inclusion is denaturalized, molten steel
Clean-up effect is obvious.Using remaining inclusion size is smaller in cleanser treated the molten steel of embodiment 1, is evenly distributed, and
The field trash of remaining passes through denaturation treatment substantially, will not have an impact to steel product performance.
Total oxygen content/ppm in the molten steel of cleanser front and back is added in table 1
As shown in Fig. 2, a kind of preparation method of agent for purifying molten steel of the present embodiment, the specific steps are as follows:
Step 1: preparation bonding component
Kaolin 70kg and sulfonated phenol formaldehyde resin the 30kg drying in drying box are weighed by mass parts, is being stirred after the completion of dry
Mixing 15~20min, the present embodiment 18min in machine is mixed, is uniformly mixed and obtains bonding component；
Step 2: active principle is prepared
Metallic aluminium 60kg, pulverized limestone 30kg, titanium dioxide 18kg, carborundum powder 15kg and biomass are weighed by mass parts
3kg is dry in drying box, stirs 25~30min, the present embodiment 30min, mixing in stirrer for mixing after the completion of drying
Uniformly obtain active principle；
Step 3: cleanser mixture
Bonding component is added in the blender of active principle, and active principle and the mass ratio of bonding component are 8:1,
Mixing is completed to be purified agent mixture；
Step 4: granulation
Cleanser mixture is added in pelletizer, and sprays water into cleanser mixture, cleanser mixture roller press
Under the action of tool power, the bonding of cleanser mixture, granulation obtain granular cleanser, and filter out particle diameter with round-hole mesh
For the cleanser of 5~10mm；The grain diameter of cleanser is 5~10mm, improves contact, mixing of the cleanser particle with molten steel
Effect improves the kinetics of cleanser and molten steel, then will keep the temperature 1h at cleanser in confined conditions 70 DEG C；Then
Cleanser particle is dried to obtain cleanser in drying box, is sealed cleanser after cooling stand-by.CaO during granulation
Modifying process is carried out to biomass, and then improves the intensity of cleanser particle, avoids granule atomization, and biomass is in high temperature item
For part in the decomposition of the biomass under the promotion of metallic element, carborundum powder, biomass and metallic aluminium collective effect reduce molten steel
In oxygen content, generate gas and accelerate the progress of reaction, carborundum powder, biomass can further generate gas and promote field trash
It floating, pulverized limestone, carborundum powder, titanium dioxide improve molten steel and remove during being mingled with the dynamic conditions for being mingled with removal of floating, and
To being modified or adsorbing to field trash, to promote the inclusion floating in molten steel, further promote field trash
Removal, reduces the content of nonmetallic inclusionsin steel, improves the quality of molten steel.
Cleanser of the invention in molten steel field trash removing and will not secondary pollution molten steel research, by the present invention
Remaining inclusion size in the molten steel of removing is smaller, is evenly distributed, and the field trash of remaining passes through denaturation treatment substantially, no
Steel part performance can be had an impact.
Embodiment 2
The basic content of the present embodiment with embodiment 1, the difference is that: cleanser is graininess, and cleanser is spherical shape
Graininess, particle diameter are 5~10mm；Cleanser includes active principle and bonding component, the matter of active principle and bonding component
Amount is than being (5~10): 1, the preferred 5:1 of the present embodiment.
Active principle in the present embodiment cleanser further includes graphite powder, red beautiful soil and magnesium-manganese alloy；Active principle according to
Following mass parts composition, 50~70 parts of metallic aluminium, 20~40 parts of pulverized limestone, 0~30 part of graphite powder, 5~20 parts of titanium dioxide, carbon
5~15 parts of SiClx powder, 2~4 parts of biomass, red beautiful 0~1 part, 0-2 parts of magnesium-manganese alloy of soil；The present embodiment is metallic aluminium 50kg, stone
Ashes 20kg, graphite powder 10kg, titanium dioxide 5kg, carborundum powder 5kg, biomass 4kg, red jade soil 1kg, magnesium-manganese alloy 2kg.
A kind of preparation method of the agent for purifying molten steel of the present embodiment, the specific steps are as follows:
Step 1: preparation bonding component
Kaolin 60kg and sulfonated phenol formaldehyde resin the 20kg drying in drying box are weighed by mass parts, is being stirred after the completion of dry
Mixing 15~20min, the present embodiment 15min in machine is mixed, is uniformly mixed and obtains bonding component；
Step 2: active principle is prepared
By mass parts weigh metallic aluminium 50kg, pulverized limestone 20kg, graphite powder 10kg, titanium dioxide 5kg, carborundum powder 5kg,
Biomass 4kg, red jade soil 1kg and magnesium-manganese alloy 2kg are dry in drying box, stir 25 in stirrer for mixing after the completion of drying
~30min, the present embodiment 25min are uniformly mixed and obtain active principle；
Step 3: cleanser mixture
Bonding component is added in the blender of active principle, and active principle and the mass ratio of bonding component are 5:1,
Mixing is completed to be purified agent mixture；
Step 4: granulation
Cleanser mixture is added in pelletizer, and sprays water into cleanser mixture, cleanser mixture roller press
Under the action of tool power, the bonding of cleanser mixture, granulation obtain granular cleanser, and filter out particle diameter with round-hole mesh
For the cleanser of 5~10mm；Then 1h will be kept the temperature at cleanser in confined conditions 75 DEG C；Then by cleanser particle in drying
It is dried to obtain cleanser in case, seals cleanser after cooling stand-by.Total oxygen content after detection is modified in molten steel, and record
As shown in table 1, data variation is as shown in Figure 1.Using remaining inclusion size in cleanser treated the molten steel of embodiment 2 compared with
It is small, be evenly distributed, steel product performance will not be had an impact.
The present invention further improves deoxidation effect, this may be due to metallic aluminium, graphite powder, biomass, silicon carbide, red
Beautiful soil and magnesium-manganese alloy powder collective effect promote the removing of the oxygen in molten steel, on the one hand magnesium-manganese alloy powder has preferable deoxidation
Effect, and magnesium-manganese alloy powder further promotes the substances such as metallic aluminium, biomass and silicon carbide and carries out deoxidation, and graphite
The gas that powder, biomass and carborundum powder reaction generate is stirred molten steel, and red beautiful soil and the common reaction of titanium dioxide produce
Object adsorbs field trash, promotes the floating of field trash, and then improves the quality of molten steel.
Embodiment 3
The basic content of the present embodiment with embodiment 1, the difference is that: the bonding component of cleanser further include starch and
Kaolin, bonding component are formed according to following mass parts: 60~80 parts of kaolin, 20~40 parts of sulfonated phenol formaldehyde resin, and starch 0-
10 parts, 0-5 parts of oil-sand.The present embodiment is formed according to following quality: kaolin 80kg, sulfonated phenol formaldehyde resin 40kg, starch 5kg,
Oil-sand 2kg.Total oxygen content after detection is modified in molten steel, and record as shown in table 1, data variation is as shown in Figure 1, effective group
Divide and the mass ratio of bonding component is 6:1, mixing is completed to be purified agent mixture.
A kind of preparation method of the agent for purifying molten steel of the present embodiment, the specific steps are as follows:
Step 1: preparation bonding component
It is dry in drying box that kaolin 80kg, sulfonated phenol formaldehyde resin 40kg, starch 5kg and oil-sand 2kg are weighed by mass parts
It is dry, 15~20min, the present embodiment 20min are stirred in stirrer for mixing after the completion of drying, is uniformly mixed and obtains bonding group
Point；
Step 2: active principle is prepared
Metallic aluminium 60kg, pulverized limestone 30kg, titanium dioxide 18kg, carborundum powder 15kg and biomass are weighed by mass parts
3kg is dry in drying box, stirs 25~30min, the present embodiment 28min, mixing in stirrer for mixing after the completion of drying
Uniformly obtain active principle；
Step 3: cleanser mixture
Bonding component is added in the blender of active principle, and active principle and the mass ratio of bonding component are 6:1,
Mixing is completed to be purified agent mixture；
Step 4: granulation
Cleanser mixture is added in cuber, and sprays water into cleanser mixture, cleanser mixture is in briquetting
Under the action of machine pressurization, the bonding of cleanser mixture, granulation obtain granular cleanser, and it is straight with round-hole mesh to filter out particle
Diameter is the cleanser of 5~10mm；Then 1h will be kept the temperature at cleanser in confined conditions 80 DEG C；Then by cleanser particle dry
It is dried to obtain cleanser in dry case, seals cleanser after cooling stand-by.
Embodiment 4
The basic content of the present embodiment with embodiment 2, the difference is that: cleanser is graininess, and cleanser is spherical shape
Graininess, particle diameter are 5~10mm；Cleanser includes active principle and bonding component, the matter of active principle and bonding component
Amount is than being (5~10): 1, the preferred 10:1 of the present embodiment.
Active principle in the present embodiment cleanser further includes urea, and the urea is graininess；The present embodiment is gold
Belong to aluminium 70kg, pulverized limestone 40kg, graphite powder 30kg, titanium dioxide 20kg, carborundum powder 15kg, biomass 2kg, red jade soil 1kg,
Magnesium-manganese alloy 1kg, urea 0.2kg.
The preparation method of the preparation method of the present embodiment such as embodiment 1, the difference is that:
Step 2: effective method for preparing ingredients thereof is prepared are as follows: weigh metallic aluminium 70kg, pulverized limestone 40kg, graphite by mass parts
Powder 30kg, titanium dioxide 20kg, carborundum powder 15kg, biomass 2kg, red jade soil 1kg, magnesium-manganese alloy 1kg, urea 0.2kg exist
It is dry in drying box, 25~30min, the present embodiment 30min are stirred in stirrer for mixing after the completion of drying, is uniformly mixed
To active principle.By cleanser in molten steel, the total oxygen content after being modified in molten steel is then detected, and is recorded as shown in table 1,
Data variation is as shown in Figure 1；Remaining inclusion size is smaller in treated molten steel, is evenly distributed, and the field trash base of remaining
This passes through denaturation treatment, will not have an impact to steel product performance.The present invention further improves deoxidation effect, this may
It is since metallic aluminium, graphite powder, biomass, silicon carbide, Chi Yutu, magnesium-manganese alloy powder and urea collective effect promote in molten steel
Oxygen removing, on the one hand magnesium-manganese alloy powder has preferable deoxidation effect, and magnesium-manganese alloy powder further promotes gold
Belong to the substances such as aluminium, biomass and silicon carbide and carry out deoxidation, and the gas that graphite powder, biomass and carborundum powder reaction generate is to steel
Liquid is stirred, and especially urea can decompose rapidly generation decomposition product when heated, and the Ammonia substance in decomposition product has relatively strong
Reproducibility, improve deoxidation effect, and the gas that reaction product generates is stirred molten steel, improves the upper of field trash
It is floating.
Embodiment 5
The basic content of the present embodiment with embodiment 2, the difference is that: cleanser is graininess, and cleanser is spherical shape
Graininess, particle diameter are 5~10mm；Cleanser includes active principle and bonding component, the matter of active principle and bonding component
Amount is than being (5~10): 1, the preferred 9:1 of the present embodiment.Active principle in the present embodiment cleanser further includes peat, the present embodiment
For metallic aluminium 70kg, pulverized limestone 40kg, graphite powder 30kg, titanium dioxide 20kg, carborundum powder 15kg, biomass 2kg, Chi Yutu
1kg, magnesium-manganese alloy 1kg, peat 1kg.Cleanser is added in molten steel, the total oxygen content after then detection is modified in molten steel,
And record as shown in table 1, data variation is as shown in Figure 1.
Using in cleanser of the invention metallic aluminium, graphite powder, biomass, silicon carbide, Chi Yutu, magnesium-manganese alloy powder and
Peat collective effect promotes the removing of the oxygen in molten steel, on the one hand magnesium-manganese alloy powder has preferable deoxidation effect, and magnesium
Manganese alloy powder further promotes the substances such as metallic aluminium, biomass and silicon carbide and carries out deoxidation, and graphite powder, biomass and carbon
The gas that the reaction of SiClx powder generates is stirred molten steel, improves deoxidation effect；It is furthermore possible to effectively facilitate in molten steel and be mingled with
Object removing and inclusion conditioning, modified field trash become multilayered sphere, tiny and be evenly distributed, high-melting-point field trash energy
It is enough to change to lower melting point inclusion, be conducive to the removal of field trash, and in treated molten steel remaining inclusion size it is smaller, point
Cloth is uniform, and the field trash of remaining passes through denaturation treatment substantially, will not have an impact to steel product performance；In addition, reaction
The gas that product generates is stirred molten steel, improves the floating of field trash.
The present invention is described in detail above in conjunction with specific exemplary embodiment.It is understood, however, that can not take off
It is carry out various modifications in the case where from the scope of the present invention being defined by the following claims and modification.Detailed description and drawings
Should be to be considered only as it is illustrative and not restrictive, if there is any such modifications and variations, then they all will
It falls into the scope of the present invention described herein.In addition, Development Status and meaning that background technique is intended in order to illustrate this technology,
It is not intended to limit the present invention or the application and application field of the invention.
More specifically, although exemplary embodiment of the present invention has been described herein, the invention is not limited to
These embodiments, but including those skilled in the art according to front detailed description it can be appreciated that it is modified, omit,
Any and whole embodiments of (such as between each embodiment) combination, adaptive change and/or replacement.In claim
It limits the language according to used in claim and is widely explained, and be not limited in foregoing detailed description or in reality
The example described during this application is applied, these examples should be considered as nonexcludability.For example, in the present invention, term is " preferably
Ground " be not it is exclusive, here it means that " preferably, but be not restricted to that ".It is in office where method or process claims
In any step for enumerating can execute in any order and be not limited to the sequence proposed in claim.Therefore, of the invention
Range should only be determined by appended claims and its legal equivalents, rather than by descriptions and examples given above Lai
It determines.
Claims (9)
1. a kind of preparation method of agent for purifying molten steel, it is characterised in that: active principle and bonding component are mixed to get cleanser
Mixture, wherein active principle and the mass ratio of bonding component are (5~10): 1；The active principle includes metallic aluminium, stone
Ashes, carborundum powder, titanium dioxide, biomass and urea；The bonding component includes kaolin and sulfonated phenol formaldehyde resin；?
The bonding of cleanser mixture, granulation obtain granular cleanser, dry, cooling standby under the action of cuber or pelletizer
With.
2. a kind of preparation method of agent for purifying molten steel according to claim 1, it is characterised in that: specific step is as follows:
Step 1: preparation bonding component
It takes bonding component dry in drying box, stirs 15~20min in stirrer for mixing after the completion of drying, be uniformly mixed
To bonding component；
Step 2: active principle is prepared
It takes active principle dry in drying box, stirs 25~30min in stirrer for mixing after the completion of drying, be uniformly mixed
To active principle；
Step 3: cleanser mixture
Bonding component is added in the blender of active principle, mixing is completed to be purified agent mixture；
Step 4: granulation
Cleanser mixture is added in cuber or pelletizer, and sprays water into cleanser mixture, cleanser mixture
Under the action of mechanical force, the bonding of cleanser mixture, granulation obtain granular cleanser, and it is straight with round-hole mesh to filter out particle
Diameter is the cleanser of 5~10mm, and cleanser particle is dried to obtain cleanser in drying box, it is cooling after by cleanser sealing to
With.
3. a kind of preparation method of agent for purifying molten steel according to claim 2, it is characterised in that: by cleanser in step 4
It keeps the temperature at 70-80 DEG C in confined conditions；Cleanser particle is then dried to obtain cleanser in drying box.
4. a kind of preparation method of agent for purifying molten steel according to claim 2, it is characterised in that: active principle further includes stone
Ink powder, red beautiful soil and magnesium-manganese alloy.
5. a kind of preparation method of agent for purifying molten steel according to claim 2, it is characterised in that: the active principle is pressed
It is formed according to following mass parts:
6. according to a kind of described in any item preparation methods of agent for purifying molten steel of claim 2-4, it is characterised in that: described is glutinous
Be combined point further includes starch and oil-sand.
7. a kind of preparation method of agent for purifying molten steel according to claim 6, it is characterised in that: the bonding component is pressed
It is formed according to following mass parts:
60~80 parts of kaolin
20~40 parts of sulfonated phenol formaldehyde resin
0-10 parts of starch
0-5 parts of oil-sand.
8. a kind of preparation method of agent for purifying molten steel according to claim 6, it is characterised in that: the active principle and glutinous
The mass ratio being combined point is (5~8): 1.
9. a kind of preparation method of agent for purifying molten steel according to claim 7 or 8, it is characterised in that: in the metallic aluminium
Al content be greater than 92%.
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| CN110819767A (en) * | 2019-11-20 | 2020-02-21 | 曲靖促创科技有限公司 | Refining agent and refining process for scrap iron steelmaking |
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