CN109202055A - A kind of excellent special steel drainage agent and preparation method thereof - Google Patents
A kind of excellent special steel drainage agent and preparation method thereof Download PDFInfo
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- CN109202055A CN109202055A CN201811428979.7A CN201811428979A CN109202055A CN 109202055 A CN109202055 A CN 109202055A CN 201811428979 A CN201811428979 A CN 201811428979A CN 109202055 A CN109202055 A CN 109202055A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/14—Closures
- B22D41/44—Consumable closure means, i.e. closure means being used only once
Abstract
The present invention provides a kind of excellent special steel drainage agents and preparation method thereof, belong to metallurgical class technical field of refractory materials.A kind of excellent special steel drainage agent, is made of the raw material of following weight parts: natural zircon sand 22-75 parts of granularity 0.1-0.5mm, 8-40 parts of the chrome ore of granularity 0.1-0.5mm, 15-35 parts of the Desert Sand of granularity 0.3-0.6mm, and 1-3 parts of liquid graphite.The excellent special steel drainage agent of the present invention, can effectively improve product casting rate, compared with existing drainage agent, self-opening rate can be improved 10% or more, and basic self-opening rate can reach 100%.Meet the demand that existing special steel steel grade is more, and ingredient gap is big, and long-time is needed to smelt, it is especially especially good to military project, nuclear power and special fine work steel grade drainage effect.
Description
Technical field
The present invention relates to metallurgical class technical field of refractory materials, and in particular to be exclusively used in excellent Melting of Special Steels drainage agent and its
Preparation method.
Background technique
Steel ladle drainage agent is also known as stuffing sand, be a kind of high refractoriness, have stable high-temperature performance, the indefinite form of resistance to molten steel it is resistance to
Fiery material.A kind of loose refractory sat in brick and filling pipe end for filling ladle, is put into ladle before converter, electric furnace steel tapping
It, at high operating temperatures will not be integral sintered to prevent molten steel entrance in the mouth of a river.It is released again when pouring steel, plays guidance steel stream
Effect is to connect to pour the key link that steel is gone on smoothly at a high speed.
Now with the product transformation upgrading of steel enterprise, excellent turn of special quality upgrading is converted by original general turn is excellent.To under
Trip steelmaking ingredient requires also stepping up.Confession in order to meet the need for the transition and upgrade that steel is looked forward to, as the production of downstream drainage agent
Answer quotient also in timely follow-up upgrading.In drainage agent conceptual design, according to demander's use environment, in conjunction with a variety of materials itself spy
Property, starting with from various aspects such as material selection, pre-processing, component proportion, grade collocation and techniques is adjusted optimization, makes every effort to steel
The using effect of enterprise.Can by facts proved that, existing market institute for drainage agent can meet the market demand using upper in general steel substantially,
But in excellent Melting of Special Steels use aspect, there are biggish defects, it cannot be guaranteed that production direct motion.Be in particular in: 1) chromium matter drains
Agent: although self-opening rate can meet requirement under the smelting condition on common steel grade, the alloying component in excellent Melting of Special Steels
It is more, be affected to the refractoriness of sand, self-opening rate is difficult to stablize under the condition of high temperature of long time treatment in addition.And because of chrome ore
Sand self-characteristic, easily cause pollution molten steel and heat transfer coefficient it is higher caused by mobility poor etc. lead to drainage agent accident
It is more.2) siliceous drainage agent: the coefficient of expansion is larger, and poor fluidity after slide plate is opened easily causes scaffold, influences ladle self-opening rate.
Though 3) aluminum, magnesia drainage agent can reach under the smelting condition of individual steel grades from opening, processed in long-time pyrolytic semlting
Cheng Zhong is easily caused and is bonded between sand grains, leads to nozzle blocking, and be unable to satisfy excellent special steel at all opens demand certainly.4) zirconium chromium matter is drawn
Flow agent: although performance is stablized at high operating temperatures, zirconium raw material granularity and ingredient used in one side are special, need to pass through in early period
It can come into operation after crossing specially treated and purification granulation, cause product cost too high, steel enterprise can not promote the use of.On the other hand, it passes through
Though crossing the zirconium oxide refractoriness of purification up to 2500 DEG C, sinter layer should not be formed in ladle, grain corner is larger after being crushed, right
The anti-permeability of molten steel is poor.Therefore, above-mentioned deficiency is solved, meets current steel and looks forward to excellent the needs of turning special-shaped gesture, mention
The self-opening rate of high drainage agent is core of the invention problem.
The patent document of Publication No. CN101185968A provides a kind of drainage agent and its system for refining in three phases
Preparation Method, the drainage agent are mainly grouped as by the group of following weight percentage: Cr2O323-35%, SiO213-45%,
Zr2O33-15%.The invention is applicant in the patent of application in 2007, the invention by raw material chrome ore, quartz sand, zircon sand,
Feldspathic sand and graphite composition, wherein zircon sand used in the technical solution have passed through the processing of purification, broken granulation step, application
It is found during high-cleanness steel grade there are the outstanding problem of chromium pollution molten steel, automatic casting ratio is undesirable, without very
The target at the beginning of product design is realized on good ground, while with the quality upgrading of excellent special steel, which should far from satisfaction
The drainage demand of class steel grade.
The patent document of Publication No. CN107382334A provides a kind of ladle magnesium zirconium draining ageng and its preparation side
Method belongs to metallurgic auxiliary materials preparation technical field, which allows resistance to height by introducing zirconium material in forsterite sintering procedure
Warm zirconium oxide coats other materials, one layer of zirconium oxide layer is wrapped up on the surface of forsterite, to improve the resistance to of forsterite
Fiery degree improves its thermal stability, improves anti-caking power, and forsterite is then crushed vibration sieve and obtains granularity forsterites at different levels
Sand, finally with inert alumina porcelain ball, carbon black, potassium feldspar combination drying to get ladle magnesium zirconium draining ageng, which is made
Drainage agent have the characteristics that at low cost, thermal stability is good, carbon content is low, when use, will not pollute molten steel, can effectively improve steel
Packet casting rate has preferable prospect of the application.But the technical solution, there are raw material complicated composition, preparation method is cumbersome equal scarce
It falls into, and the practical self-opening rate for the drainage of excellent special steel is lower than 85%, has much room for improvement.
Summary of the invention
In view of this, present invention seek to address that existing market demand and colleague's drainage agent product in use not
Foot, by abundant Theoretical Proof, experiment sintering and industrial field, spy develop a kind of excellent special steel zirconium draining ageng made of chromium and
Preparation method.Technical solution of the present invention combines most steel to look forward to excellent Melting of Special Steels demand and molten steel to drainage agent in development process
Influence at high operating temperatures, according to the deficiency that unlike material drainage agent currently used in the market is shown, by material
It is made under reasonably combined, component the adjusting and optimizing and novelty of material selection and its granularity and reasonable production technology.Through
Cross field demonstration, it is ensured that excellent Melting of Special Steels even poured goes on smoothly, and self-opening rate meets the use demand of excellent special steel at present,
Be conducive to the exploitation of high-purity, high-cleanness steel grade.
In order to solve the above technical problems, the technical scheme adopted by the invention is that:
A kind of excellent special steel drainage agent, is made of the raw material of following weight parts: natural zircon sand 22-75 parts of granularity 0.1-0.5mm,
8-40 parts of the chrome ore of granularity 0.1-0.5mm, 15-35 parts of the Desert Sand of granularity 0.3-0.6mm, 1-3 parts of liquid graphite.
Preferably, ZrO in the natural zircon sand2Mass percent >=60%, SiO2Mass percent≤35%, it is micro-
Mass percent≤5% of secondary element.
Preferably, Cr in the chrome ore2O3Mass percent >=46%, SiO2Mass percent≤1.5%, Cr/Fe
Mass percent >=1.6%.
Preferably, SiO in the Desert Sand2Mass percent >=96%.
Preferably, in the graphite C mass percent >=75%.
Preferably, the excellent special steel drainage agent, the mass percent of effective component are as follows: ZrO2: 10-45%, Cr2O3: 3-
20%, SiO2: 20-60%, Fe2O3: 2-12%, C:0.8-3%.
The preparation method of excellent special steel drainage agent of the present invention, sequentially includes the following steps:
Step 1: natural zircon sand, Desert Sand and chrome ore, which are utilized respectively conveying device, is transmitted to feed bin；
Step 2: batch can is added in liquid graphite；
Step 3: natural zircon sand, Desert Sand and the chrome ore of the first step are taken respectively, through microcomputer according to weight
After metering, is stirred 4-6 minutes in cartridge type blender, obtain premix, the liquid graphite is then added, is further continued for stirring
15-20 minutes；
Step 4: drainage agent made from the third step is dried, guarantee product moisture within 0.1%；
Step 5: the product after drying is cooling, communicated device is sent to finished bin, measures, is packed and stored.
Preferably, the liquid graphite is made of the mixing of graphite, bonding agent and water, the weight of the graphite, bonding agent and water
Amount is than being 1:(0.3-1): (3-4).
Preferably, the liquid graphite is mixed using high-pressure spraying mode with the premix, the high-pressure spraying
Pressure be 0.2-0.3MPa.
Preferably, 500-550 DEG C of the drying temperature, 130-150 DEG C of temperature of outgoing air, it is per hour that stuffing sand, which dries flow,
3-5 tons.
The present invention has the beneficial effect that compared with conventional drainage agent:
For the present invention through the above technical solutions, providing a kind of drainage agent for being exclusively used in extra-fine steel, refractoriness is suitable for sintered layer thickness
Spend easily controllable, good fluidity, self-opening rate can reach 100% substantially.Specifically it is illustrated from the following aspect:
1, raw material selects and content proportion: 1) present invention uses natural zircon sand for major ingredient, is equipped with chrome ore in right amount, using natural
The features such as zircon sand coefficient of expansion is low, and stability is good, is not easy to be soaked by molten steel, and fillet coefficient is big solves existing with chrome ore
Sand is Cr in the zirconium draining ageng made of chromium of major ingredient2O3It is reacted at high temperature with alkali metal oxide and is formed by Cr+Pollution to air
And the pollution problem to part molten steel, while the drainage agent also changed because of chrome ore in low temperature caused by sintering shrinkage is excessively burnt
Knot problem had not only improved product mobility, but also sinter layer thickness can be promoted easily controllable；The present invention is also equipped with appropriate Desert Sand,
Using the big feature of its fillet coefficient, the mobility of drainage agent is further promoted.2) present invention passes through raw material composition and its content
It is reasonably combined, gained drainage agent refractoriness is moderate, stability contorting within the scope of 1630-1700 DEG C, refractoriness be higher than 1720 DEG C,
It is not easy to form sinter layer, the anti-permeability of molten steel is poor；Refractoriness is lower than 1610 DEG C, and anti-sintering property is poor, sinter layer thickness
Greatly, ladle is not easy to open certainly；The present invention is made up of raw material and the science of content is arranged in pairs or groups, and refractoriness is stablized reasonable
In range, and then promote to be formed the sinter layer of Rational Thickness, while effectivelying prevent infiltration of molten steel, significantly improves the steel of excellent special steel
Packet self-opening rate；Performance is stablized under the gained drainage agent condition of high temperature, Cr2O3、Fe2O3Content is low, does not pollute air and molten steel, meets
Excellent special steel forbids the demand of drainage and molten steel cleanliness.The prior art is to improve the refractoriness of drainage agent, generallys use purification
Zircon sand, such as: the zirconium oxide refractoriness of zirconium silicate, zirconium oxide etc., purification is up to 2500 DEG C, and anti-agglutinatting property is strong, but unfavorable
It is unhelpful from opening to ladle in the sinter layer for forming Rational Thickness；And on the basis of using zircon sand is purified, to form reasonably thick
The sinter layer of degree, it will usually be incorporated the lower ingredient of the refractoriness such as more chrome ore, feldspathic sand, it is aforementioned on the one hand to there is exacerbation
Pollution problem, another aspect ingredient type is complicated, and the stability of drainage agent is not easy to control, and self-opening rate is unstable.
2, granularity selection and collocation: the present invention selects the natural zircon sand cost of manufacture that granularity is 0.1-0.5mm cheap, circle
Ascent is big, effectively prevent infiltration of molten steel, improves ladle self-opening rate, and existing zirconium draining ageng made of chromium usually selects purification processing silicon
Sour zirconium or zirconium oxide need to be obtained by series of process such as artificial synthesized, broken, granulations, and granularity is bigger than normal, and corner angle are larger, anti-
Only effect is poor in terms of infiltration of molten steel.
3, process aspect: firstly, graphite, bonding agent and water are mixed after liquid graphite by the present invention carries out overlay film, and
Using high-pressure spraying mode by liquid graphite coating to premix surface, matched graphite can be made sufficiently to be wrapped in premix particle table
Really isolation and lubricant effect are played in face；And produce and use process without dust, can reach it is ideal from open effect and
Realize environmentally friendly synergy.Bonding agent used in the present invention is any one in the conventional binders of this field, such as: waterglass combines
Agent, phosphoric acid Al binding agent, ρ-Al2O3Bonding agent.Secondly, present invention combination drainage agent performance, carries out the stoving process of drainage agent
Optimization show that it is 3-5 tons per hour that stuffing sand, which dries flow, at 500-550 DEG C of drying temperature, 130-150 DEG C of temperature of outgoing air
Under process conditions, drainage agent drying effect is uniform, and the water content after drying can be stablized below controlling value.
In conclusion the excellent special steel drainage agent of the present invention, can effectively improve product casting rate, compared with existing drainage agent,
Self-opening rate can be improved 10% or more, and basic self-opening rate can reach 100%.Meet that existing special steel steel grade is more, and ingredient gap is big, needs to grow
The demand that time smelts is especially especially good to military project, nuclear power and special fine work steel grade drainage effect.Such as: midium-carbon steel
1cr12Ni2w1Mo1V, military project steel 30crMoTiA reach 97% or more using drainage agent self-opening rate of the present invention, more existing drainage
The self-opening rate of agent improves 17% or so；Special fine work steel FAS2225/GCr15/41B30M5 uses drainage agent self-opening rate of the present invention
Reach 99% or more, more existing drainage agent self-opening rate improves 10% or so, and practice effect is very good.The present invention by raw material, match
Than and blending powder optimization, can be by Cr in zirconium draining ageng made of chromium2O3Content is reduced to the controlling value for causing molten steel to pollute
Hereinafter, meeting drainage agent does not pollute molten steel and clean steel forbids the quality requirement of drainage.The comprehensive of steel enterprise can be effectively reduced simultaneously
Synthesis originally, effectively reduces poison gas and dust emission, reduces security risk, reaches high-quality, energy-saving and environment-friendly purpose, while meeting mesh
Preceding steel enterprise is to quality, environmental protection, safe and effective requirement.
Specific embodiment
For a better understanding of the present invention, the contents of the present invention, but this hair are further fairly set out below with reference to embodiment
Bright protection content is not limited solely to the following examples.In the following description, give a large amount of concrete details so as to
More thorough understanding of the invention is provided.It will be apparent, however, to one skilled in the art that the present invention can be with
It is carried out without one or more of these details.
Fillet coefficient indicates the corner angle size degree of feed particles in the present invention, and fillet coefficient is bigger, indicates that corner angle are smaller.
Embodiment 1
A kind of excellent special steel drainage agent, is made of the raw material of following weight parts: 22 parts of the natural zircon sand of granularity 0.1-0.5mm, grain
40 parts of chrome ore for spending 0.1-0.5mm, 35 parts of the Desert Sand of granularity 0.3-0.6mm, 3 parts of liquid graphite.
In the present invention, ZrO in natural zircon sand2Mass percent >=60%, SiO2Mass percent≤35%, it is micro
Mass percent≤5% of element.SiO in Desert Sand2Mass percent >=96%.Cr in chrome ore2O3Mass percent >=
46%, SiO2Mass percent≤1.5%, Cr/Fe mass percent >=1.6%.Mass percent >=75% of C in graphite.
The preparation method of the excellent special steel drainage agent of the present embodiment, sequentially includes the following steps:
Step 1: natural zircon sand, Desert Sand and chrome ore, which are utilized respectively conveying device, is transmitted to feed bin；
Step 2: graphite, bonding agent and water are mixed and made into liquid graphite, the weight ratio of graphite, bonding agent and water is 1:0.3:
3, batch can is added；
Step 3: natural zircon sand, Desert Sand and the chrome ore of the first step are taken respectively, through microcomputer according to weight
It after metering, is stirred 4 minutes in cartridge type blender, obtains premix, the liquid graphite is then added, be further continued for 15 points of stirring
Clock；
Step 4: drainage agent made from the third step is dried, guarantee product moisture within 0.1%；
Step 5: the product after drying is cooling, communicated device is sent to finished bin, measures, is packed and stored.
In the present invention, liquid graphite is mixed using high-pressure spraying mode with the premix, the high-pressure spraying
Pressure is 0.2MPa.
500 DEG C of drying temperature, 130 DEG C of temperature of outgoing air, it is 3 tons per hour that stuffing sand, which dries flow,.
Graphite used in the present embodiment is crystalline flake graphite, 300 mesh of granularity <.
Bonding agent used in the present embodiment is waterglass bonding agent.
Embodiment 2
A kind of excellent special steel drainage agent, is made of the raw material of following weight parts: 25 parts of the natural zircon sand of granularity 0.1-0.5mm, grain
38 parts of chrome ore for spending 0.1-0.5mm, 35 parts of the Desert Sand of granularity 0.3-0.6mm, 2 parts of liquid graphite.
The present embodiment, natural zircon sand, Desert Sand, chrome ore, the chemical composition of graphite and content are the same as embodiment 1.
The preparation method of the excellent special steel drainage agent of the present embodiment, sequentially includes the following steps:
Step 1: natural zircon sand, Desert Sand and chrome ore, which are utilized respectively conveying device, is transmitted to feed bin；
Step 2: graphite, bonding agent and water are mixed and made into liquid graphite, the weight ratio of graphite, bonding agent and water is 1:0.8:
3.8, batch can is added；
Step 3: natural zircon sand, Desert Sand and the chrome ore of the first step are taken respectively, through microcomputer according to weight
It after metering, is stirred 5 minutes in cartridge type blender, obtains premix, the liquid graphite is then added, be further continued for 15 points of stirring
Clock；
Step 4: drainage agent made from the third step is dried, guarantee product moisture within 0.1%；
Step 5: the product after drying is cooling, communicated device is sent to finished bin, measures, is packed and stored.
In the present invention, liquid graphite is mixed using high-pressure spraying mode with the premix, the high-pressure spraying
Pressure is 0.25MPa.
520 DEG C of drying temperature, 135 DEG C of temperature of outgoing air, it is 4 tons per hour that stuffing sand, which dries flow,.
Graphite used in the present embodiment is crystalline flake graphite, 300 mesh of granularity <.
Bonding agent used in the present embodiment is ρ-Al2O3Bonding agent.
Embodiment 3
A kind of excellent special steel drainage agent, is made of the raw material of following weight parts: 35 parts of the natural zircon sand of granularity 0.1-0.5mm, grain
30 parts of chrome ore for spending 0.1-0.5mm, 33 parts of the Desert Sand of granularity 0.3-0.6mm, 1.6 parts of liquid graphite.
The present embodiment, natural zircon sand, Desert Sand, chrome ore, the chemical composition of graphite and content are the same as embodiment 1.
The preparation method of the excellent special steel drainage agent of the present embodiment, sequentially includes the following steps:
Step 1: natural zircon sand, Desert Sand and chrome ore, which are utilized respectively conveying device, is transmitted to feed bin；
Step 2: graphite, bonding agent and water are mixed and made into liquid graphite, the weight ratio of graphite, bonding agent and water is 1:1:4,
Batch can is added；
Step 3: natural zircon sand, Desert Sand and the chrome ore of the first step are taken respectively, through microcomputer according to weight
It after metering, is stirred 6 minutes in cartridge type blender, obtains premix, the liquid graphite is then added, be further continued for 15 points of stirring
Clock；
Step 4: drainage agent made from the third step is dried, guarantee product moisture within 0.1%；
Step 5: the product after drying is cooling, communicated device is sent to finished bin, measures, is packed and stored.
In the present invention, liquid graphite is mixed using high-pressure spraying mode with the premix, the high-pressure spraying
Pressure is 0.3MPa.
530 DEG C of drying temperature, 140 DEG C of temperature of outgoing air, it is 4.5 tons per hour that stuffing sand, which dries flow,.
Graphite used in the present embodiment is crystalline flake graphite, 300 mesh of granularity <.
Bonding agent used in the present embodiment is phosphoric acid Al binding agent.
Embodiment 4
A kind of excellent special steel drainage agent, is made of the raw material of following weight parts: 50 parts of the natural zircon sand of granularity 0.1-0.5mm, grain
18 parts of chrome ore for spending 0.1-0.5mm, 30 parts of the Desert Sand of granularity 0.3-0.6mm, 1.8 parts of liquid graphite.
The present embodiment, natural zircon sand, Desert Sand, chrome ore, the chemical composition of graphite and content are the same as embodiment 1.
The preparation method of the excellent special steel drainage agent of the present embodiment, sequentially includes the following steps:
Step 1: natural zircon sand, Desert Sand and chrome ore, which are utilized respectively conveying device, is transmitted to feed bin；
Step 2: graphite, bonding agent and water are mixed and made into liquid graphite, the weight ratio of graphite, bonding agent and water is 1:0.6:
3.6, batch can is added；
Step 3: natural zircon sand, Desert Sand and the chrome ore of the first step are taken respectively, through microcomputer according to weight
It after metering, is stirred 5 minutes in cartridge type blender, obtains premix, the liquid graphite is then added, be further continued for 20 points of stirring
Clock；
Step 4: drainage agent made from the third step is dried, guarantee product moisture within 0.1%；
Step 5: the product after drying is cooling, communicated device is sent to finished bin, measures, is packed and stored.
In the present invention, liquid graphite is mixed using high-pressure spraying mode with the premix, the high-pressure spraying
Pressure is 0.3MPa.
550 DEG C of drying temperature, 150 DEG C of temperature of outgoing air, it is 5 tons per hour that stuffing sand, which dries flow,.
Graphite used in the present embodiment is crystalline flake graphite, 300 mesh of granularity <.
Bonding agent used in this implementation is ρ-Al2O3Bonding agent.
Embodiment 5
A kind of excellent special steel drainage agent, is made of the raw material of following weight parts: 52 parts of the natural zircon sand of granularity 0.1-0.5mm, grain
27 parts of chrome ore for spending 0.1-0.5mm, 20 parts of the Desert Sand of granularity 0.3-0.6mm, 1.3 parts of liquid graphite.
The present embodiment, natural zircon sand, Desert Sand, chrome ore, the chemical composition of graphite and content are the same as embodiment 1.
The preparation method of the excellent special steel drainage agent of the present embodiment, sequentially includes the following steps:
Step 1: natural zircon sand, Desert Sand and chrome ore, which are utilized respectively conveying device, is transmitted to feed bin；
Step 2: graphite, bonding agent and water are mixed and made into liquid graphite, the weight ratio of graphite, bonding agent and water is 1:0.5:
3.4, batch can is added；
Step 3: natural zircon sand, Desert Sand and the chrome ore of the first step are taken respectively, through microcomputer according to weight
It after metering, is stirred 5 minutes in cartridge type blender, obtains premix, the liquid graphite is then added, be further continued for 15 points of stirring
Clock；
Step 4: drainage agent made from the third step is dried, guarantee product moisture within 0.1%；
Step 5: the product after drying is cooling, communicated device is sent to finished bin, measures, is packed and stored.
In the present invention, liquid graphite is mixed using high-pressure spraying mode with the premix, the high-pressure spraying
Pressure is 0.3MPa.
550 DEG C of drying temperature, 150 DEG C of temperature of outgoing air, it is 4 tons per hour that stuffing sand, which dries flow,.
Bonding agent used in the present embodiment is waterglass bonding agent.
Graphite used in the present embodiment is crystalline flake graphite, 300 mesh of granularity <.
Embodiment 6
A kind of excellent special steel drainage agent, is made of the raw material of following weight parts: 60 parts of the natural zircon sand of granularity 0.1-0.5mm, grain
22 parts of chrome ore for spending 0.1-0.5mm, 17 parts of the Desert Sand of granularity 0.3-0.6mm, 1 part of liquid graphite.
The present embodiment, natural zircon sand, Desert Sand, chrome ore, the chemical composition of graphite and content are the same as embodiment 1.
The preparation method of the excellent special steel drainage agent of the present embodiment is refering to embodiment 1.
Embodiment 7
A kind of excellent special steel drainage agent, is made of the raw material of following weight parts: 65 parts of the natural zircon sand of granularity 0.1-0.5mm, grain
10 parts of chrome ore for spending 0.1-0.5mm, 23 parts of the Desert Sand of granularity 0.3-0.6mm, 2.4 parts of liquid graphite.
The present embodiment, natural zircon sand, Desert Sand, chrome ore, the chemical composition of graphite and content are the same as embodiment 1.
The preparation method of the excellent special steel drainage agent of the present embodiment is refering to embodiment 1.
Embodiment 8
A kind of excellent special steel drainage agent, is made of the raw material of following weight parts: 75 parts of the natural zircon sand of granularity 0.1-0.5mm, grain
8 parts of chrome ore for spending 0.1-0.5mm, 15 parts of the Desert Sand of granularity 0.3-0.6mm, 3 parts of liquid graphite.
The present embodiment, natural zircon sand, Desert Sand, chrome ore, the chemical composition of graphite and content are the same as embodiment 1.
The preparation method of the excellent special steel drainage agent of the present embodiment is refering to embodiment 1.
Embodiment 9
The raw material of the excellent special steel drainage agent of the present embodiment forms and preparation method is substantially the same manner as Example 1, except that:
Step 2: graphite, bonding agent and water are mixed and made into liquid graphite, the weight ratio of graphite, bonding agent and water is 1:0.4:
3.5, batch can is added.
Bonding agent used in the present embodiment is phosphoric acid Al binding agent.
Embodiment 10
The raw material of the excellent special steel drainage agent of the present embodiment forms and preparation method is substantially the same manner as Example 1, except that:
Step 2: graphite, bonding agent and water are mixed and made into liquid graphite, the weight ratio of graphite, bonding agent and water is 1:0.7:
3.7, batch can is added.
Bonding agent used in the present embodiment is waterglass bonding agent.
Comparative example 1
A kind of excellent special steel drainage agent, is made of the raw material of following weight parts: 50 parts of the natural zircon sand of granularity < 0.1mm, granularity
18 parts of the chrome ore of 0.1-0.5mm, 30 parts of the Desert Sand of granularity < 0.3mm, 1.8 parts of liquid graphite.
The preparation method of the excellent special steel drainage agent of comparative example 1 is refering to embodiment 4.
Comparative example 2
A kind of excellent special steel drainage agent, is made of the raw material of following weight parts: 50 parts of the natural zircon sand of granularity 0.6-0.9mm, grain
18 parts of chrome ore for spending 0.6-0.8mm, 30 parts of the Desert Sand of granularity 0.3-0.6mm, 1.8 parts of liquid.
The preparation method of the excellent special steel drainage agent of comparative example 2 is refering to embodiment 4.
Comparative example 3
A kind of excellent special steel drainage agent, is made of the raw material of following weight parts: 22 parts of the zirconium oxide of granularity 0.1-0.5mm, granularity
40 parts of the chrome ore of 0.1-0.5mm, 35 parts of the Desert Sand of granularity 0.3-0.6mm, 3 parts of liquid graphite.
The preparation method of the excellent special steel drainage agent of comparative example 3 is refering to embodiment 1.
Comparative example 4
A kind of excellent special steel drainage agent, is made of the raw material of following weight parts: 52 parts of the natural zircon sand of granularity 0.1-0.5mm, grain
27 parts of chrome ore for spending 0.1-0.5mm, 20 parts of the feldspathic sand of granularity 0.3-0.6mm, 1.3 parts of liquid.
The preparation method of the excellent special steel drainage agent of comparative example 4 is refering to embodiment 5.
Comparative example 5
A kind of excellent special steel drainage agent, is made of the raw material of following weight parts: 52 parts of the natural zircon sand of granularity 0.1-0.5mm, grain
Spend 27 parts of chrome ore of 0.1-0.5mm, 20 parts of the Desert Sand of granularity 0.3-0.6mm, 1.3 parts of graphite, preparation method and embodiment 5
Unlike:
Step 2: batch can is added in graphite；
Step 3: natural zircon sand, Desert Sand and the chrome ore of the first step are taken respectively, through microcomputer according to weight
It after metering, is stirred 5 minutes in cartridge type blender, obtains premix, the graphite is then added, be further continued for stirring 15 minutes,
Atomized water is sprayed into during stirring.
Wherein, the adding manner of graphite direct plunges into for normal pressure, and atomized water is high pressure penetrating, sprays into pressure and embodiment 5
High-pressure spraying pressure it is identical.
Comparative example 6
A kind of preparation method of excellent special steel drainage agent is as different from Example 9:
Step 2: batch can is added in graphite；
Step 3: natural zircon sand, Desert Sand and the chrome ore of the first step are taken respectively, through microcomputer according to weight
It after metering, is stirred 5 minutes in cartridge type blender, bonding agent is added during stirring, be uniformly mixed, obtain premix, so
After the graphite is added, be further continued for stirring 15 minutes, atomized water is sprayed into during stirring.
Wherein, the adding manner of bonding agent and graphite direct plunges into for normal pressure, atomized water be high pressure spray into, spray into pressure with
The high-pressure spraying pressure of embodiment 9 is identical.
The excellent special steel drainage agent of the present invention, the mass percent of effective component are as follows: ZrO2: 10-45%, Cr2O3: 3-20%,
SiO2: 20-60%, Fe2O3: 2-12%, C:0.8-3%.
Wherein, the active chemical and its quality hundred of embodiment 1- embodiment 10 and comparative example 1-6 gained drainage agent
Divide than as shown in table 1.
The active chemical and its mass percent of 1 drainage agent of table
| Experimental example/mass percent | ZrO2 | Cr2O3 | SiO2 | Fe2O3 | C |
| Embodiment 1 | 13.8 | 18.6 | 41.8 | 11.1 | 2.19 |
| Embodiment 2 | 15.6 | 17.48 | 42.5 | 10.64 | 1.5 |
| Embodiment 3 | 21.8 | 12.9 | 43.6 | 8.31 | 1.23 |
| Embodiment 4 | 30.6 | 8.28 | 46.3 | 5.02 | 1.35 |
| Embodiment 5 | 31.9 | 12.51 | 37.63 | 7.43 | 1.02 |
| Embodiment 6 | 37.2 | 10..36 | 37.14 | 6.07 | 0.78 |
| Embodiment 7 | 39.2 | 4.61 | 44.24 | 2.81 | 1.8 |
| Embodiment 8 | 44.8 | 3.71 | 40.6 | 2.21 | 2.23 |
| Embodiment 9 | 13.8 | 18.6 | 41.8 | 11.1 | 2.19 |
| Embodiment 10 | 13.6 | 18.55 | 41.9 | 11.3 | 2.17 |
| Comparative example 1 | 30.6 | 8.27 | 46.2 | 4.96 | 1.34 |
| Comparative example 2 | 30.6 | 8.27 | 46.2 | 4.96 | 1.34 |
| Comparative example 3 | 19.9 | 18.5 | 35.2 | 11.2 | 2.28 |
| Comparative example 4 | 32.1 | 12.45 | 32.19 | 7.42 | 0.98 |
| Comparative example 5 | 31.8 | 12.5 | 37.62 | 7.42 | 1.01 |
| Comparative example 6 | 13.8 | 18.6 | 41.8 | 11.2 | 2.18 |
Practical situations of the gained drainage agent for excellent special steel ladle draining are as shown in table 2.
The practical situations of 2 drainage agent of table
| Experimental example | Using steel grade | To steel time/h | Use furnace number/furnace | From blow-on number/furnace | Self-opening rate/% |
| Embodiment 1 | 1cr12Ni2w1Mo1V | 6-8 | 85 | 84 | 98.8 |
| Embodiment 2 | 1cr12Ni2w1Mo1V | 6-8 | 92 | 92 | 100 |
| Embodiment 3 | FAS2225 | 5-7 | 68 | 68 | 100 |
| Embodiment 4 | FAS2225 | 5-7 | 99 | 98 | 99.0 |
| Embodiment 5 | 30crMoTiA | 5-8 | 132 | 131 | 99.2 |
| Embodiment 6 | GCr15 | 4-6 | 88 | 87 | 98.9 |
| Embodiment 7 | GCr15 | 4-6 | 94 | 94 | 100 |
| Embodiment 8 | 41B30M5 | 3-5 | 52 | 52 | 100 |
| Embodiment 9 | 41B30M5 | 3-5 | 66 | 65 | 98.5 |
| Embodiment 10 | 41B30M5 | 3-5 | 45 | 44 | 97.8 |
| Comparative example 1 | FAS2225 | 5-7 | 45 | 40 | 91.1 |
| Comparative example 2 | FAS2225 | 5-7 | 56 | 51 | 89.3 |
| Comparative example 3 | 1cr12Ni2w1Mo1V | 6-8 | 48 | 40 | 83.3 |
| Comparative example 4 | 30crMoTiA | 5-8 | 52 | 43 | 82.7 |
| Comparative example 5 | 30crMoTiA | 5-8 | 53 | 45 | 84.9 |
| Comparative example 6 | 41B30M5 | 3-5 | 79 | 71 | 89.9 |
It would know that by 2 data of table 1- table:
Comparative example 1: raw material composition and preparation method change the blending powder of raw material with embodiment 4 compared with Example 4, have
Body is to be used for the drainage of steel grade FAS2225 as the result is shown using the lesser natural zircon sand of granularity and Desert Sand, and self-opening rate is more real
The decline of example 4 about 8% is applied, illustrates the undersized of natural zircon sand and Desert Sand, High-temperature sintering, gained drainage agent is unfavorable for
For ladle from opening, suitable blending powder is conducive to ladle self-opening rate.
Comparative example 2: with embodiment 4, the granularity for changing raw material compared with Example 4 is taken for raw material composition and preparation method
Match, specially use the biggish natural zircon sand of granularity and chrome ore, is used for the drainage of steel grade FAS2225 as the result is shown, opens certainly
Rate illustrates that the granularity of natural zircon sand and chrome ore is excessive, anti-infiltration of molten steel performance is poor, and gained draws compared with the decline of embodiment 4 about 10%
Stream agent is unfavorable for ladle from opening, and suitable blending powder is conducive to ladle self-opening rate.
Comparative example 3: the preparation method is the same as that of Example 1, substitutes zircon sand using zirconium oxide compared with Example 1, as the result is shown
For the drainage of steel grade 1cr12Ni2w1Mo1V, self-opening rate is decreased obviously compared with embodiment 1, and zirconium oxide is purification zirconium material, resistance to
The more natural zircon sand of fiery degree is high, and after substitution, the refractoriness of gained drainage agent is more than 1720 DEG C, and when tapping is difficult to form sinter layer,
It is unfavorable for forming the sinter layer of Rational Thickness, is unfavorable for ladle and opens certainly.
Comparative example 4: preparation method changes raw material composition compared with Example 5, specially uses feldspar with embodiment 5
Sand substitutes Desert Sand, and sand refractoriness reduces.It is used for the drainage of steel grade 30crMoTiA as the result is shown, self-opening rate to be bright compared with embodiment 5
Decline is shown, illustrates that raw material composition of the present invention is more optimized, arranges in pairs or groups more scientific, gained drainage agent performance is stablized, and opens certainly conducive to ladle.
Comparative example 5: raw material composition omits the use of bonding agent compared with embodiment 5, and changes the Adding Way of graphite, has
After premix is added in graphite by body, then atomized water is sprayed into, be used for the drainage of steel grade 30crMoTiA as the result is shown, self-opening rate is more real
Applying example 5 reduces by 14% or more, illustrates that the present invention uses and graphite, bonding agent and water are mixed and made into liquid graphite, then carry out high pressure spray
The mode of leaching is more advantageous to the excellent drainage agent of forming properties, and omitting bonding agent, then graphite and the binding performance of premix are poor, together
Shi Caiyong first adds graphite, then the mode sprayed water, and is also unfavorable for the control of dust.
Comparative example 6: compared with Example 9, changing the Adding Way of graphite, specifically mixes bonding agent with premix
After even, graphite adding, atomized water is sprayed into whipping process, gained drainage agent is used for the drainage of steel grade 41B30M5 as the result is shown,
Self-opening rate decreases compared with embodiment 9, and is unfavorable for dust Control.
Drainage agent of the present invention is incorporated the chrome ore and Desert Sand of proper ratio using natural zircon sand as major ingredient, and optimizes grain
Degree collocation and preparation method, so that the refractoriness of stuffing sand is moderate, sinter layer thickness is easily controllable in zone of reasonableness, and anti-molten steel seeps
Permeability can be good, and for the ladle draining of excellent special steel, self-opening rate can achieve 100%, more existing excellent special steel drainage agent improve 10% with
On, progress is significant.
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, this field is common
Other modifications or equivalent replacement that technical staff makes technical solution of the present invention, without departing from technical solution of the present invention
Spirit and scope, be intended to be within the scope of the claims of the invention.
Claims (10)
1. a kind of excellent special steel drainage agent, which is characterized in that be made of the raw material of following weight parts: granularity 0.1-0.5mm's is natural
22-75 parts of zircon sand, 8-40 parts of the chrome ore of granularity 0.1-0.5mm, 15-35 parts of the Desert Sand of granularity 0.3-0.6mm, liquid stone
It is 1-3 parts black.
2. excellent special steel drainage agent as described in claim 1, it is characterised in that: ZrO in the natural zircon sand2Quality percentage
Than >=60%, SiO2Mass percent≤35%, mass percent≤5% of microelement.
3. excellent special steel drainage agent as claimed in claim 2, it is characterised in that: Cr in the chrome ore2O3Mass percent >=
46%, SiO2Mass percent≤1.5%, Cr/Fe mass percent >=1.6%.
4. excellent special steel drainage agent as claimed in claim 3, it is characterised in that: SiO in the Desert Sand2Mass percent >=
96%。
5. excellent special steel drainage agent as claimed in claim 4, it is characterised in that: mass percent >=75% of C in the graphite.
6. such as the described in any item excellent special steel drainage agents of claim 1 ~ 5, it is characterised in that: the excellent special steel drainage agent, effectively
The mass percent of ingredient are as follows: ZrO2: 10-45%, Cr2O3: 3-20%, SiO2: 20-60%, Fe2O3: 2-12%, C:0.8-3%.
7. the preparation method of excellent special steel drainage agent as claimed in claim 6, which is characterized in that sequentially include the following steps:
Step 1: natural zircon sand, Desert Sand and chrome ore, which are utilized respectively conveying device, is transmitted to feed bin；
Step 2: batch can is added in liquid graphite；
Step 3: natural zircon sand, Desert Sand and the chrome ore of the first step are taken respectively, through microcomputer according to weight
After metering, is stirred 4-6 minutes in cartridge type blender, obtain premix, the liquid graphite is then added, is further continued for stirring
15-20 minutes；
Step 4: drainage agent made from the third step is dried, guarantee product moisture within 0.1%；
Step 5: the product after drying is cooling, communicated device is sent to finished bin, measures, is packed and stored.
8. the preparation method of excellent special steel drainage agent as claimed in claim 7, it is characterised in that: the liquid graphite by graphite,
Bonding agent and water mixing composition, the weight ratio of the graphite, bonding agent and water are 1:(0.3-1): (3-4).
9. the preparation method of excellent special steel drainage agent as claimed in claim 8, it is characterised in that: the liquid graphite uses high pressure
Spray mode is mixed with the premix, and the pressure of the high-pressure spraying is 0.2-0.3MPa.
10. the preparation method of excellent special steel drainage agent as claimed in claim 9, it is characterised in that: the drying temperature 500-550
DEG C, 130-150 DEG C of temperature of outgoing air, it is 3-5 tons per hour that stuffing sand, which dries flow,.
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| CN112898033A (en) * | 2021-03-25 | 2021-06-04 | 上海荣源冶金材料有限公司 | Zirconium-chromium drainage sand |
| CN114315321A (en) * | 2021-12-22 | 2022-04-12 | 河南通宇冶材集团有限公司 | Special drainage agent for cord steel and preparation method thereof |
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