CN106588005A - Refractory material for homogeneous skimming ball for continuous casting ladle and method for making skimming ball - Google Patents
Refractory material for homogeneous skimming ball for continuous casting ladle and method for making skimming ball Download PDFInfo
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- CN106588005A CN106588005A CN201610936860.5A CN201610936860A CN106588005A CN 106588005 A CN106588005 A CN 106588005A CN 201610936860 A CN201610936860 A CN 201610936860A CN 106588005 A CN106588005 A CN 106588005A
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- skimming ball
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/48—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on zirconium or hafnium oxides, zirconates, zircon or hafnates
- C04B35/482—Refractories from grain sized mixtures
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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
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- C04B35/481—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on zirconium or hafnium oxides, zirconates, zircon or hafnates containing silicon, e.g. zircon
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- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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Abstract
Provided is a refractory material for a homogeneous skimming ball for a continuous casting ladle. The refractory material is prepared from, by weight, 62%-80% of ZrO2, 14%-32% of Al2O3, 2%-6% of SiO2, 2%-4% of SiC, 3.0%-6.5% of silica sol and the balance inevitable impurities. The phenomenon that slag in the ladle enters tundish can be effectively prevented, the heat shock resistance stability is good, erosion or melting is prevented, and cracking or busting is effectively prevented.
Description
Technical field
The present invention relates to field of metallurgy, more particularly to Con casting ladle homogeneous skimming ball.
Background technology
In metallurgical process, it is to avoid metallurgical slag is known technical requirements into molten steel.At present, converter tapping process
In, pushing off the slag Technical comparing is ripe, discloses more patent of invention and utility model with regard to converter slag blocking plug or skimming ball special
Profit, such as：ZL201620229498.3, ZL201620123722.0, ZL201220656139.8, ZL201420812925.1,
ZL201220340602.8, ZL201620001804.8, by refractory material ectosome inside plus appropriate metal or metal oxidation
Thing counterweight, and various designs have been carried out in shape to strengthen pushing off the slag effect.Because the converter tapping time only has 3 minutes or so, and
Floating plug or skimming ball can be added in converter by machinery in tapping latter stage, and this technology can not be applied to gear in Con casting ladle
Slag.
In casting process, at present the slag in control ladle has into the technology of tundish：[1] stopper is added in ladle
Method.Add the upper and lower refractory material stopper of an insertion ladle in ladle.Due to security reason, the method seldom makes now
With；[2] skateboard control method.Molten steel in ladle is all that the slide gate nozzle by installing outside the ladle bottom mouth of a river is flowed in the middle of continuous casting
Bag, operative employee controls slag and enters tundish, it is difficult under ensureing control according to check weighing and experience by closing slide gate nozzle
The accuracy of slag；[3] Lower proterozoic group method.A set of Lower proterozoic group system is installed outside ladle nozzle, according to infrared principles or molten steel
The principle different with slag resistivity, develops a series of ladle roughing slag detection methods, such as：Chinese patent
ZL201420022246.4, ZL201010510263.9, ZL201010249403.1, ZL01126918.9, etc..Due to being indirect
Detection slag method, once having detected slag stream in the mouth of a river, the vortex in ladle already there occurs, had slag with
To in tundish, this technology cannot fundamentally prevent in ladle slag stream in tundish to vortex stream.[4] in Con casting ladle
Interior skimming ball or slag retaining cone carry out pushing off the slag.Such as Chinese patent：ZL 201420433988.6 discloses a kind of big bag cast pushing off the slag
With floating plug, the floating plug is made up of plug head and plug body part, and plug head is positive six prismsby shape；Plug body part, positioned at plug head just
Lower section, is integrally formed with plug head, and plug body part is the semiellipse bodily form；Its primary raw material is sulphur steel, grain steel and steel fine powder, and
Ladle is put into before cast after liquid steel refining is outbound, big Baogang's coolant-temperature gage puts into ladle typically at 1530 ~ 1680 DEG C during continuous casting
Afterwards, within ten minutes, above-mentioned floating plug is i.e. synchronous with liquid steel temperature in big bag, higher than the fusion temperature of above-mentioned primary raw material,
In 40 ~ 90min of normal casting cycle, there is fusing and cannot use in floating plug.For another example Chinese patent ZL 201520770781.2
A kind of skimming ball for preventing big bag vortex slag is disclosed, skimming ball is by solid sphere and is coated on resistance to outside solid sphere
Fiery material layer is constituted, and its solid sphere is iron ball or steel ball, is melted because of the high temperature in Con casting ladle when using, and leads to not reality
Apply on border.Metallargist explores to having made some as skimming ball raw material with equal fire resistant materials, such as：
ZL201210304453.4, it is refractory material fine powder iron power removing that its is raw materials used, is Brown Alundum fine powder or high alumina fine powder and iron
Mixture；ZL200310119481.X raw materials are mainly magnesia and iron ore powder；United States Patent (USP) US4725045 discloses one kind
Floating plug in taper ladle, it adopts a steel ball（Steel shot) be cast in aluminum fire resistant materials formed proportion be
0.176lbs/in3（4.872kg/cm3) floating plug.These technologies are because of iron content or iron ore powder in raw material, it is impossible in high temperature
Long-time is used in Con casting ladle.If attempted at the end of steel ladle pouring is fast, in advance a few minutes are put into skimming ball or floating plug,
Because ladle on the continuous casting panoramic table, also has insulation cover during continuous casting on ladle, it is impossible to be put into realizing safety and precise skimming ball or
Floating plug.
With the development of metallurgical technology, the field trash in continuous casting billet is required more and more sternly, and prior art cannot be real
Now prevention ladle slag truly enters tundish, and when smelting special steel, steel mill is only at cast beginning and end
Several continuous casting billets degrade or scrap, and this had both increased cost, and the tissue difficulty of production is increased again.
Skimming ball in Con casting ladle is set to realize slag stopping function, skimming ball must simultaneously have following technical characterstic：[1] compare
It is great in 4.0 kg/cm3, so ensure skimming ball all the time in liquid steel -- the slag interface of Con casting ladle；[2] skimming ball
It is interior so to ensure skimming ball 40 ~ 90min in 1530 ~ 1680 DEG C of Con casting ladle containing metal or low melting point
Inside do not ftracture and melt；[3] skimming ball has extremely strong heat-resistant knocking stability, and skimming ball is direct plungeed into when so ensureing normal temperature
Do not burst in 1530 ~ 1680 DEG C of Con casting ladle；[4] skimming ball has extremely strong anti-slag etch ability, so ensures gear
Slag ball is not failed in 40 ~ 90min in 1530 ~ 1680 DEG C of Con casting ladle by slag etch；[5] size of skimming ball
Match with ladle nozzle diameter, so ensure that skimming ball can smoothly be rolled into mouth of a river top and play pushing off the slag effect.Above-mentioned these are wanted
Seeking Truth routine skimming ball technology and furnace lining zirconium matter castable technology（Such as Chinese patent：ZL201010535390.4,
ZL201210216037.9) cannot meet.
In sum, when present patent application, skimming ball in pushing off the slag technology or ladle is either sensed outside ladle
Technology all has the following disadvantages：[1] skimming ball complex structure, it is dangerous；[2] cannot eliminate and reduce vortex；[3] skimming ball
The oxide of interior iron content or iron, Density inhomogeneity, it is impossible in high temperature Con casting ladle for a long time using and be not etched or melt；
[4] skimming ball heat-resistant knocking stability is inadequate, it is impossible to bear direct plunge into ultra high temperature gradient after high temperature ladle and cause cracking or
Burst.
The content of the invention
The present invention is directed to the deficiencies in the prior art, there is provided one kind can effectively prevent slag in ladle from entering tundish, resists
Good thermal shock stability, prevents from corroding or melts, and effectively prevents the Con casting ladle homogeneous skimming ball fire proofed wood for ftractureing or bursting
Material and its making skimming ball method.
To realize the object of the invention, there is provided technical scheme below：A kind of Con casting ladle homogeneous skimming ball fire proofed wood
Material, it is characterised in that its component includes by weight percentage ZrO2 62~80wt%、 Al2O3 14~32wt%、SiO2 2~
2 ~ 4wt% of 6wt%, SiC, additional 3.0 ~ 6.5wt% of Ludox, balance of inevitable impurity.
To realize the object of the invention, there is provided another kind of technical scheme：A kind of Con casting ladle homogeneous skimming ball fire resisting
Material makes skimming ball method, it is characterised in that will make
Each raw material is as follows by weight ratio：The raw materials by weight meter of skimming ball will be made：Stabilizing zirconia 62 ~ 80
Wt%, 14 ~ 32wt% of electro-corundum, the wt% of pinniform polysilicon 2.0 ~ 5.0 of granularity≤1 μm, the SiC micro mists of granularity≤5 μm
System is practiced in 2.0 ~ 4.0 wt%, the wt% of water reducer 0.1 ~ 0.5, the wt% of explosion-proof fiber 0.03 ~ 0.06 mixing, then accounts for above-mentioned in addition
The Ludox of the wt% of percentage by weight 3.0 ~ 6.5 of raw material summation is mixed, and pours skimming ball mould molding into, then the demoulding, maintenance,
Be put in kiln by the programming rate of≤50 DEG C/h be raised to 800 DEG C be incubated more than 2 hours, then by≤50 DEG C/h cooling rate cool down
To room temperature, product ladle skimming ball is obtained final product, proportion is 4.0 ~ 4.9 kg/cm3.Skimming ball terminates to be put into before continuous casting starts in refining
In ladle, at the end of continuous casting is fast, under molten steel eddy current effect, skimming ball stream prevents slag in ladle from entering to ladle nozzle top
Enter tundish.
Preferably, after the demoulding is to place 24 hours, conserving to conserve 48 hours in constant-temperature constant-humidity environment.
Preferably, stabilizing zirconia by weight percentage by：3 ~ 8mm of particle, 31 ~ 40 wt%；The mesh of particle 40 ~ 70,
12.4~16 wt%；The mesh of particle 100 ~ 180,6.2 ~ 8.0 wt%；The mesh of particle 300 ~ 500,12.4 ~ 16%.
Preferably, electro-corundum by weight percentage by：1 ~ 3mm of particle, 8.4 ~ 19.2 wt%；The mesh of particle 40 ~ 70,
2.1~4.8 wt%；The mesh of particle 100 ~ 180,1.4 ~ 3.2 wt%；The mesh of particle 300 ~ 500,2.1 ~ 4.8 wt%.
Above-mentioned grain composition is non-successional, then is equipped with other additives, and this level is with the present invention product produced
The product skimming ball porosity≤10%, is that the grading method of normal pouring material is not accomplished.
Preferably, mixing white silk step processed includes first premixing stabilizing zirconia and electro-corundum particulate material 10 minutes,
It is subsequently adding explosion-proof fiber, the SiC micro mists of granularity≤5 μm, water reducer, the pinniform polysilicon of granularity≤1 μm to knead 15 minutes.
Practice have shown that, Con casting ladle skimming ball will be immersed in for a long time in 1530 ~ 1680 DEG C of high-temperature molten steel, minimal amount of
Iron tramp can cause skimming ball cracking, failure.In the present invention, when all iron content is more than 0.5% in raw material, that is, need except iron.It is first
First body material is carried out with magnet except iron, can't such as to reach requirement, just by body material stabilizing zirconia and corundum
Particle and fine powder are put into 30 ~ 50%（W/w soak 12 ~ 18 hours in hydrochloric acid solution), after taking-up, washing, dry for standby.
One of key problem in technology as the present invention：The skimming ball of normal temperature direct plunges into 1530 by the present invention when in use ~
In 1680 DEG C of Con casting ladle, this wants product to have the thermal shock resistance of superelevation.The present invention creatively draws pinniform polysilicon
In entering castable, Ludox complex technique is added by pinniform polysilicon, realize and combined without cement.The pinniform polysilicon, custom
Claim " white rice husk ", be rice husk by the product obtained by control condition combustion and pyrolysis, it is commercially available.SiO in its raw material2≥
92wt%, CGu≤ 0.05 wt %, in the present invention, the original pinniform polysilicon that buying comes voluntarily are processed into less than 300 purposes
Fine powder, plus its reticular microstructure of man-hour can not destroy, and still keep unformed state, the average grain diameter of its microstructure elementary particle
About 50nm, specific surface area is more than 300m2/ g.Experiment shows that this pinniform polysilicon functions well as in the present invention knot
The effect of mixture and stabilizer, the microstructure after high temperature burns till shows, pinniform polysilicon at high temperature with ZrO2Micro mist reacts
Zircon phase is generated, but reticulates link again each other, which greatly improves the thermal shock resistance of product of the present invention.And adopt silicon
Other micropowder materials such as micro mist just do not reach this effect.
As the two of the key problem in technology of the present invention：Ludox is nano level silica dioxide granule in water or in solvent
Dispersion colloid solution, odorless, nontoxic, molecular formula is represented by mSiO2nH2O, silica sol particle fine (10 ~ 20nm) has quite
Big specific surface area, it is commercially available, during buying, in control Ludox SiO is contained222.0 ~ 26.0% is optimal.During high temperature, silicon is molten
The sub- SiO of micelle2Micropowders effect is played, the stability of each solid melt-phase is enhanced.Product of the present invention adds the percentage by weight to be
The pinniform polysilicon 2.0 ~ 5.0% of reference, it is possible to additionally incorporate 3.0 ~ 5.5wt% of Ludox that percentage by weight is reference during production.Industry
Interior technician knows, thermal shock and body it is close be two contradiction index, the present invention combines complex art, product by above-mentioned without cement
Jing after 800 DEG C of easy fireds are processed, cold crushing strength only has 30-50MPa, and high temperature thermal shock resistance is good.So in body
Close >=4.0 kg/cm3, under conditions of the porosity≤10%, realize the thermal shock resistance of superelevation.
The three of the technology of the present invention key：Anti- slag action ability.Product primary raw material is stabilizing zirconia in the present invention, it
Not only there is the high specific gravity that can meet the present invention to require, also extraordinary anti-slag action ability, commercially available Stable Oxygen
Changing zirconium has respectively that calcium stable, magnesium be stable, yttrium is stable and stable composition zirconium oxide, and Jing is checked, and these stabilizing zirconias can meet
The present invention is used, during buying, it is desirable to ZrO2≥93.0%.The zirconium oxide of other forms can all cause product to ftracture at high temperature mistake
Effect.For the anti-slag action ability for further improving product skimming ball of the present invention, the present invention is also by adding appropriate SiC micro-
Powder, Jing experiments require SiC >=95.0% in SiC micro mists, optimal addn is 2.0 ~ 4.0%, and particle size range is less than 5 μm.This
Raw material additionally uses electro-corundum, wherein Al in invention2O3>=99.0%, it is commercially available, during high temperature, itself and ZrO2Generate stable
Fused alumina zirconia phase, there is fabulous anti-slag action ability.In the industry technician knows that zirconium oxide has good thermal shock resistance and anti-stove
Scouring ability, during present invention experiment, also once tried to produce ladle skimming ball using the high temperature firing technology of continuous casting sprue, but tried
There is Cracking Failure in the used time, this is because, continuous casting sprue has overcoat to protect, and makes the blind crack at the mouth of a river and will not expand and affect to make
With.In Con casting ladle, as long as skimming ball occurs crackle, will fail under slag action and thermal stress comprehensive function.
Pushing off the slag bulb diameter is determined by water model and numerical simulation.After refining terminates, skimming ball is put in ladle, continuous casting
Period, ladle, along insulation clad is also stamped on ladle, cannot visually see the position of skimming ball on conticaster panoramic table
Put, be to ensure that skimming ball is accurately in above ladle nozzle at the end of continuous casting, the present invention is passed through by setting up water model simulation
Tracer determines the parameters such as the rule that vortex occurs, the movement locus of skimming ball；Mathematical Modeling simulation again is calculated, and by scene
Inspection, it is found that pushing off the slag bulb diameter 100 ~ 120mm bigger than ladle nozzle diameter is more satisfactory, preferably for, with than ladle nozzle diameter
Big 110mm is optimal.
Beneficial effect of the present invention：Can effectively prevent slag in ladle from entering tundish, heat-resistant knocking stability is good, prevent from corroding
Or fusing, effectively prevent from ftractureing or bursting.
Specific embodiment
Below in conjunction with several specific embodiments, exemplary illustration and help further understand the present invention, but embodiment is concrete
Details is not merely to the explanation present invention, represents the whole technical schemes under present inventive concept, therefore should not be construed as to this
The total technical scheme of invention is limited, and some increase or change in technical staff without departing from the unsubstantiality of present inventive concept,
For example with the simple change of profile or the simple change of forming method or replacement, belong to the scope of the present invention.
Embodiment 1：
The various acceptable materials of buying are removed into as follows by weight ratio after iron：
Material name granularity percentage by weight（wt%）
3 ~ 8mm of stabilizing zirconia 40.0
40 ~ 70 mesh 14.0
100 ~ 180 mesh 6.0
300 ~ 500 mesh 13.0
1 ~ 3mm of electro-corundum 10.0
40 ~ 70 mesh 3.8
100 ~ 180 mesh 2.5
300 ~ 500 mesh 4.0
Pinniform polysilicon≤1 μm 3.0
SiC micro mist≤5 μm 3.2
Water reducer 0.46
Explosion-proof fiber 0.04
Ludox（It is additional） 3.8
During production, the stabilizing zirconia prepared by proportioning table and electro-corundum particulate material are premixed 10 minutes, are added and are pressed proportioning table
The various raw materials for preparing, knead 15 minutes, add 3.8wt% Ludox to be mixed again, pour mould into and make the spherical of diameter 160mm,
The demoulding after placing 24 hours, then conserve 48 hours in constant-temperature constant-humidity environment, it is put in kiln and is raised to by the programming rate of 50 DEG C/h
800 DEG C are incubated 4 hours, then are cooled to room temperature by the cooling rate of 50 DEG C/h, obtain final product product ladle skimming ball of the present invention, its composition
Content is by weight percentage： ZrO2 68.89wt%、 Al2O3 22.06wt%、SiO23.77wt%, SiC 3.14wt%, ball
The kg/cm of body proportion 4.813。
150 tons of ladles of certain steel mill, smelt ship steel, ladle nozzle diameter 50mm, when even the first stove is poured, using the present invention
Product ladle skimming ball, 1680 DEG C of ladle temperature, 80 minutes durations of pouring, pushing off the slag success at the end of cast, skimming ball etch is thick
Degree 5.5mm.
Embodiment 2：
Jing after magnet removes iron, all iron content also has 0.79% in raw material, then carries out pickling except iron, by stabilizing zirconia and corundum
Particle and fine powder be put into 45%（W/w soak 15 hours in hydrochloric acid solution), after taking-up, washing, dry for standby.
By removing, each raw material after iron is as follows by weight ratio：
Material name granularity percentage by weight（wt%）
3 ~ 8mm of stabilizing zirconia 31.0
40 ~ 70 mesh 14.0
100 ~ 180 mesh 7.0
300 ~ 500 mesh 15.2
1 ~ 3mm of electro-corundum 15.5
40 ~ 70 mesh 4.0
100 ~ 180 mesh 2.8
300 ~ 500 mesh 3.0
Pinniform polysilicon≤1 μm 4.27
SiC micro mist≤5 μm 3.0
Water reducer 0.2
Explosion-proof fiber 0.03
Ludox（It is additional） 6.5
During production, the stabilizing zirconia prepared by proportioning table and electro-corundum particulate material are premixed 10 minutes, are added and are pressed proportioning table
The various raw materials for preparing, knead 15 minutes, add 6.5wt% Ludox to be mixed again, pour mould into and make the spherical of diameter 150mm,
The demoulding after placing 24 hours, then conserve 48 hours in constant-temperature constant-humidity environment, it is put in kiln and is raised to by the programming rate of 40 DEG C/h
800 DEG C are incubated 3 hours, then are cooled to room temperature by the cooling rate of 40 DEG C/h, obtain final product product ladle skimming ball of the present invention, its composition
Content is by weight percentage： ZrO2 63.84wt%、 Al2O3 25.95wt%、SiO25.05wt%, SiC 2.94wt%, ball
The kg/cm of body proportion 4.433。
90 tons of ladles of certain steel mill, smelt pinion steel, ladle nozzle diameter 45mm, during continuous casting, using product ladle of the present invention
Skimming ball, 1620 DEG C of ladle temperature, 50 minutes durations of pouring, pushing off the slag success at the end of cast, skimming ball etch thickness 3.5mm.
Embodiment 3：
The various acceptable materials of buying are removed into as follows by weight ratio after iron：
Material name granularity percentage by weight（wt%）
3 ~ 8mm of stabilizing zirconia 34.0
40 ~ 70 mesh 14.0
100 ~ 180 mesh 6.2
300 ~ 500 mesh 16.0
1 ~ 3mm of electro-corundum 12.0
40 ~ 70 mesh 4.2
100 ~ 180 mesh 3.0
300 ~ 500 mesh 3.0
Pinniform polysilicon≤1 μm 5.0
SiC micro mist≤5 μm 2.04
Water reducer 0.5
Explosion-proof fiber 0.06
Ludox（It is additional） 3.5
During production, the stabilizing zirconia prepared by proportioning table and electro-corundum particulate material are premixed 10 minutes, are added and are pressed proportioning table
The various raw materials for preparing, knead 15 minutes, add 3.5wt% Ludox to be mixed again, pour mould into and make the spherical of diameter 150mm,
The demoulding after placing 24 hours, then conserve 48 hours in constant-temperature constant-humidity environment, it is put in kiln and is raised to by the programming rate of 50 DEG C/h
800 DEG C are incubated 2 hours, then are cooled to room temperature by the cooling rate of 30 DEG C/h, obtain final product product ladle skimming ball of the present invention, its composition
Content is by weight percentage： ZrO2 66.65wt%、 Al2O3 22.97wt%、SiO25.97wt%, SiC1.84wt%, spheroid
The kg/cm of proportion 4.203。
100 tons of ladles of certain steel mill, Smelting Bearing Steel, ladle nozzle diameter 50mm, during continuous casting, using product ladle of the present invention
Skimming ball, 1570 DEG C of ladle temperature, 55 minutes durations of pouring, pushing off the slag success at the end of cast, skimming ball etch thickness 3.2mm.
The shape of skimming ball of the present invention can adopt conventional spheroidal, taper or ellipse.
Claims (10)
1. a kind of Con casting ladle homogeneous skimming ball refractory material, it is characterised in that its component includes by weight percentage
ZrO2 62~80wt%、 Al2O3 14~32wt%、SiO22 ~ 6wt%, 2 ~ 4wt% of SiC, additional 3.0 ~ 6.5wt% of Ludox, surplus
For inevitable impurity.
2. a kind of Con casting ladle homogeneous skimming ball makes skimming ball method with refractory material, it is characterised in that will make
Each raw material is as follows by weight ratio：The raw materials by weight meter of skimming ball will be made：Stabilizing zirconia 62 ~ 80
Wt%, 14 ~ 32wt% of electro-corundum, the wt% of pinniform polysilicon 2.0 ~ 5.0 of granularity≤1 μm, the SiC micro mists of granularity≤5 μm
System is practiced in 2.0 ~ 4.0 wt%, the wt% of water reducer 0.1 ~ 0.5, the wt% of explosion-proof fiber 0.03 ~ 0.06 mixing, then accounts for above-mentioned in addition
The Ludox of the wt% of percentage by weight 3.0 ~ 6.5 of raw material summation is mixed, and pours skimming ball mould molding into, then the demoulding, maintenance,
Be put in kiln by the programming rate of≤50 DEG C/h be raised to 800 DEG C be incubated more than 2 hours, then by≤50 DEG C/h cooling rate cool down
To room temperature, product ladle skimming ball is obtained final product, proportion is 4.0 ~ 4.9 kg/cm3。
3. a kind of Con casting ladle homogeneous skimming ball according to claim 2 makes skimming ball method with refractory material, its
After the demoulding is characterised by place 24 hours, conserve to conserve 48 hours in constant-temperature constant-humidity environment.
4. a kind of Con casting ladle homogeneous skimming ball according to claim 2 makes skimming ball method with refractory material, its
Be characterised by stabilizing zirconia by weight percentage by：3 ~ 8mm of particle, 31 ~ 40 wt%；The mesh of particle 40 ~ 70,12.4 ~ 16
wt%；The mesh of particle 100 ~ 180,6.2 ~ 8.0 wt%；The mesh of particle 300 ~ 500,12.4 ~ 16%.
5. a kind of Con casting ladle homogeneous skimming ball according to claim 2 makes skimming ball method with refractory material, its
Be characterised by electro-corundum by weight percentage by：1 ~ 3mm of particle, 8.4 ~ 19.2 wt%；The mesh of particle 40 ~ 70,2.1 ~ 4.8
wt%；The mesh of particle 100 ~ 180,1.4 ~ 3.2 wt%；The mesh of particle 300 ~ 500,2.1 ~ 4.8 wt%.
6. a kind of Con casting ladle homogeneous skimming ball according to claim 2 makes skimming ball method with refractory material, its
Feature is being that mixing white silk step processed includes first premixing stabilizing zirconia and electro-corundum particulate material 10 minutes, is subsequently adding
Explosion-proof fiber, the SiC micro mists of granularity≤5 μm, water reducer, the pinniform polysilicon of granularity≤1 μm are kneaded 15 minutes.
7. a kind of Con casting ladle homogeneous skimming ball according to claim 2 makes skimming ball method with refractory material, its
It is characterised by being carried out stabilizing zirconia and electro-corundum raw material magnet except iron process before system is practiced in mixing.
8. a kind of Con casting ladle homogeneous skimming ball according to claim 2 makes skimming ball method with refractory material, its
It is characterised by being put into 30 ~ 50% to the particle and fine powder of stabilizing zirconia and electro-corundum before system is practiced in mixing（W/w hydrochloric acid) is molten
Soak 12 ~ 18 hours in liquid, after taking-up, washing, dry for standby.
9. a kind of Con casting ladle homogeneous skimming ball according to claim 2 makes skimming ball method with refractory material, its
It is characterised by that silica sol particle subparticle is 10 ~ 20nm, SiO is contained in Ludox222.0~26.0%。
10. a kind of Con casting ladle homogeneous skimming ball according to claim 2 makes skimming ball method with refractory material, its
It is characterised by pushing off the slag bulb diameter 100 ~ 120mm bigger than ladle nozzle diameter.
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| CN110183213A (en) * | 2019-05-31 | 2019-08-30 | 武汉钢铁有限公司 | A kind of dry working lining and preparation method thereof adding waste refractory materials |
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|---|---|---|---|---|
| JPH10279367A (en) * | 1997-03-31 | 1998-10-20 | Kawasaki Steel Corp | Graphite-containing monolithic refractory material for blast furnace main trough metal line |
| CN1727309A (en) * | 2004-07-28 | 2006-02-01 | 宝山钢铁股份有限公司 | Refractory material in use for continuous casting and usage |
| CN102351566A (en) * | 2011-07-01 | 2012-02-15 | 济南圣泉倍进陶瓷过滤器有限公司 | Preparation method for foamed ceramic filter |
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2016
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10279367A (en) * | 1997-03-31 | 1998-10-20 | Kawasaki Steel Corp | Graphite-containing monolithic refractory material for blast furnace main trough metal line |
| CN1727309A (en) * | 2004-07-28 | 2006-02-01 | 宝山钢铁股份有限公司 | Refractory material in use for continuous casting and usage |
| CN102351566A (en) * | 2011-07-01 | 2012-02-15 | 济南圣泉倍进陶瓷过滤器有限公司 | Preparation method for foamed ceramic filter |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110183213A (en) * | 2019-05-31 | 2019-08-30 | 武汉钢铁有限公司 | A kind of dry working lining and preparation method thereof adding waste refractory materials |
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