CN108178641A - A kind of tundish dry material and preparation method thereof - Google Patents
A kind of tundish dry material and preparation method thereof Download PDFInfo
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- CN108178641A CN108178641A CN201810038472.4A CN201810038472A CN108178641A CN 108178641 A CN108178641 A CN 108178641A CN 201810038472 A CN201810038472 A CN 201810038472A CN 108178641 A CN108178641 A CN 108178641A
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- dry material
- tundish dry
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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
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
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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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
- C04B2235/3206—Magnesium oxides or oxide-forming salts thereof
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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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
A kind of novel tundish dry material and preparation method thereof belongs to technical field of refractory materials, and tundish dry material is by weight percentage containing 83 ~ 88% magnesite clinkers, 5 ~ 10% wustites, 1 ~ 5% alumina powder, 4 ~ 5% carbonaceous binders, 2 ~ 3% other additives.Preparation method is：（1）Magnesia powder, wustite powder, carbonaceous binder, additive in sand mixer are premixed 20 ~ 25 minutes, obtain premix powders after mixing；（2）Magnesia particle material further mixing 15 ~ 20 minutes are added in into above-mentioned premix powders, obtain tundish dry material.Tundish dry material of the present invention and preparation method thereof, production cost is low, and the sintering activity of product is high, and service life is long, there is good application prospect.
Description
Technical field
The invention belongs to technical field of refractory materials, more particularly to a kind of tundish dry material and preparation method thereof.
Background technology
Tundish dry material is a kind of universal liner in dundish refractory material of application.Tundish dry material is using
In the process, by molten steel and slag erosion and wash away, and refractory raw material particle in dry materials is caused to come off, the dry type bed of material is gradual
It is thinning, until cannot benefit from.Coming off for refractory raw material not only influences tundish service life in tundish dry material, influences energy saving
Emission reduction, the refractory material to come off enter after molten steel the non-metallic inclusion that cannot such as float and will also be formed in steel in time, serious shadow
Ring product quality.Therefore, tundish dry material is extremely important in continuous casting production process with refractory material service life.
Current tundish dry material, mainly magnesia refractories, i.e. refractory raw material are based on different grades of magnesia
Want raw material.According to the difference of combination, it is several that carbon combination, inorganic salts combination and oxide micropowder combination etc. can be divided into.Wherein,
Application due to its good high temperature resistant and erosion-resisting characteristics of carbon combination magnesium dry-type stock is universal.But in baking of tundish and use work
Cheng Zhong, once as the carbonaceous material with reference to phase because the reasons such as oxidation come off, since the magnesia powder in substrate material is using temperature
It is difficult to effectively be sintered under degree, interparticle bond strength is low in decarburized layer, easily comes off under the souring in molten bath, influences dry type
Expect service life.Although inorganic salts with reference to oxide micropowder with reference to the decarburized layer bond strength caused by oxidation of coal can be avoided low
The problem of, but both combinations not there is only it is of high cost the problem of, due also to introducing impurity component to some extent, cause
The erosion-resisting characteristics of dry materials is deteriorated.
Chinese patent（Publication number CN101423417A）Provide a kind of low carbon magnesia carbon brick containing metallic iron, this material
Containing metallic iron 1~8%, remaining is magnesia 83~94%, and carbon 1~6% is combined with 2.5%~5% carbon-containing bonding agents,
It also can additional a small amount of antioxidant.The performance of this low carbon magnesia carbon brick compared with common magnesia carbon brick, have into molten steel carburetting it is few,
Not the characteristics of ultra-low-carbon steel easy to pollute.Since magnesia is as the main component, make the magnesia carbon brick that there is good anti-scour property.By
Enable the magnesia carbon brick that there is good slag penetration resistance and excellent thermal shock performance in carbon is one of as the main component.Metallic iron
Addition improve the thermal conductivity of low carbon magnesia carbon brick, generate liquid phase under high temperature, reduce internal stress.So as to improve low-carbon magnesium carbon
The thermal shock resistance of brick.
Publication number CN103387396A）A kind of converter extracting vanadium magnesium iron carbon brick and preparation method thereof is provided, belongs to fire resisting
Field of material technology, converter extracting vanadium magnesium iron carbon brick by weight percentage containing fused magnesite 62 ~ 84%, flaky graphite 10 ~
18%, iron powder 5 ~ 12%, netted fixed carbon 1 ~ 3%, antioxidant 0 ~ 5%；Preparation method is：（1）By fused magnesite, flakey stone
Ink, iron powder and carbonaceous binder mixing, add in or are added without antioxidant, obtain mixed material after mixing；（2）It will mixing
Material compression moulding under the pressure of 200 ~ 250MPa, is made adobe；（3）By adobe at a temperature of 150 ~ 250 DEG C, progress 12 ~
The heat treatment of 32 hours obtains converter extracting vanadium magnesium iron carbon brick.The converter extracting vanadium of the present invention is good with magnesium iron carbon brick practical performance, system
Preparation Method is simple, has a good application prospect.
Although above-mentioned two patents all disclose component magnesia and ferro element, both added in the form of metallic iron
Into magnesium carbon refractory product, the Volumetric expansion generated using metallic iron oxidation improves the compactness of decarburized layer.But with metal
During the form addition of iron, not only addition cost is higher, and is passed through unlike refractory product due to tundish dry material and be pressed into
Type but using vibration moulding, the compactness of dry materials after easily influencing construction due to the mobility of metal iron powder is poor.In addition,
Since the tundish working time is only 20 ~ 40 hours, and metal iron powder needs initial oxidation could further to be formed after FeO with MgO
Solid solution, metal iron powder can not form solid solution in a short time, admittedly it can not be applied in the making of tundish dry material.
Invention content
The present invention is directed to the existing tundish dry material existing above problem in use, provides a kind of centre and is responsible for a task until it is completed
Formula material and preparation method thereof, is designed by novel components, is reached and is improved decarburized layer bond strength, improves the antiscour of decarburized layer
Property, promote the raising of tundish dry material service life.
Purpose to realize the present invention provides following technical scheme：A kind of tundish dry material, material composition by weight hundred
Divide and include 83 ~ 88% magnesite clinkers, 1 ~ 5% alumina powder, 4 ~ 5% carbonaceous binders, 2 ~ 3% additives than meter, it is characterised in that
Also include 5 ~ 10% wustites.
Preferably, FeO content >=95% in wustite, the mesh of granularity≤200.
Preferably,Carbonaceous binder includes at least one of phenolic resin, industrial sucrose, the mesh of granularity≤100.
Preferably, additive is aluminium powder, silica flour and/or B4C powder, purity by weight >=98% of antioxidant, granularity≤
200 mesh.
Purpose to realize the present invention provides a kind of preparation side of tundish dry material as claimed in claim 1 or 2
Method, it is characterised in that include the following steps：
（1）Magnesia powder, wustite, alumina powder, carbonaceous binder, additive are premixed 20 ~ 25 minutes in sand mixer,
Premix powders are obtained after mixing；
（2）Magnesia particle material further mixing 15 ~ 20 minutes are added in into above-mentioned premix powders, obtain tundish dry material.
Preferably, the tundish dry material, after vibration moulding, bulk density is 2.65 ~ 2.75g/cm3, apparent pore
Rate, 21.4 ~ 22.3%, service life 24 ~ 36 hours.
Above-mentioned magnesia is magnesite clinker, content of magnesia >=90% in magnesia.
Al in above-mentioned alumina powder2O3Content >=98%, the mesh of granularity≤325.
FeO content >=96% in above-mentioned square iron miberal powder, the mesh of granularity≤200.
Above-mentionedCarbonaceous binder includes at least one of phenolic resin, industrial sucrose, the mesh of granularity≤100.Phenolic aldehyde tree Weight content >=40% of C is fixed in fat.
It is well known that MgO and FeO can form unlimited solid solution.After FeO is added in into magnesia tundish dry material,
Under hot conditions, as FeO is dissolved into MgO, MgO crystallite dimensions increase, distance between MgO fine powders in reduction dry materials matrix,
Be conducive to crystal grain during applied at elevated temperature to grow up and sintering densification；Meanwhile Fe2+Replace Mg2+The MgO crystal defects of formation
It is also beneficial to improve the sintering activity of base portion, acceleration of sintering densification.With the abundant sintering of base portion, it is beneficial to
The intergranular bond strength of dry materials is improved, improves the scour resistance of tundish dry material, improves the service life of dry materials.
Meanwhile with the reduction of the additive amounts such as alumina powder, advantageously reduce production cost, reduce additive to dry materials into
The pollution divided improves the corrosion resistance of dry materials.Although ferro element has Fe, FeO, Fe2O3、Fe3O4Etc. a variety of existence forms, and
FeO is to be stabilized phase, but with Fe under high temperature oxidation stability atmosphere2O3Or Fe3O4When form adds in, Fe under hot conditions2O3Or
Fe3O4Reduce, lead with apparent volume contraction, the iron content powder particles size of addition when being changed into FeOCause generation FeO with MgO interparticle contacts degree is deteriorated, and influences solid solution rates of the FeO into MgO, thus on the make between packet dry materials when addition effect Fruit is too late to be directly added into FeO.
Advantageous effect of the present invention：
Tundish dry material provided by the invention after carbonaceous binder oxidation, passes through periclase and wustite under hot conditions
Solid solution reaction, base portion generate magnesium wustite, Volumetric expansion and generated in-situ magnesium using solid solution reaction
The sintering activity of wustite can realize effective sintering of decarburized layer at use temperature in tundish, improve decarburized layer compactness,
Sintering strength, scour resistance and erosion-resisting characteristics are remarkably improved the service life of dry materials.
The dry materials and its production method of the present invention, process is simple, and dry materials performance is good, before having good application
Scape.
Specific embodiment
The phenolic resin selected in the embodiment of the present invention is heat cured liquid phenolic resin purchased in market or industrial sucrose.
The sand mixer selected in the embodiment of the present invention is edge mill.（Model S1410）
Embodiment 1：
The magnesite clinker of use accounts for the 88% of dry materials total weight.Wherein, MgO weight contents 90% in 3-1mm magnesia, addition accounts for
Dry materials total weight 35%；MgO weight contents 90% in 1-0mm magnesia, addition account for dry materials total weight 30% ,≤200 mesh magnesia
Middle content of MgO is 92%, and addition accounts for dry materials total weight 23%；
Al in the alumina powder of use2O3Content is 98.5%, and the mesh of granularity≤325, addition accounts for the 5% of dry materials total weight
For the carbonaceous binder used for phenolic resin, the weight content 45% of fixed C, addition accounts for the 4% of dry materials total weight；
The additive used is aluminium powder, purity by weight 98.5%, and the mesh of granularity≤200, addition accounts for the 3% of dry materials total weight；
Magnesia powder, square iron miberal powder, alumina powder, phenolic resin, additive are premixed 25 minutes in sand mixer, mixing is equal
Premix powders are obtained after even；
Magnesia particle material further mixing 20 minutes are added in into above-mentioned premix powders, obtain tundish dry material.
The dry materials produced according to the method described above, after scene vibration construction and 200 DEG C of bakings, 2.65 g/ of bulk density
cm3, apparent porosity 22.3%, cold crushing strength 35.7MPa, service life 24 hours.
Embodiment 2：
The magnesite clinker of use accounts for the 85% of dry materials total weight.Wherein, MgO weight contents 90% in 3-1mm magnesia, addition accounts for
Dry materials total weight 35%；MgO weight contents 90% in 1-0mm magnesia, addition account for dry materials total weight 30% ,≤200 mesh magnesia
Middle content of MgO is 92%, and addition accounts for dry materials total weight 20%；
The purity by weight 95% of the square iron miberal powder of use, the mesh of granularity≤200, addition account for dry materials total weight 5%；
Al in the alumina powder of use2O3Content is 98.5%, and the mesh of granularity≤325, addition accounts for the 4% of dry materials total weight
For the carbonaceous binder used for phenolic resin, the weight content 45% of fixed C, addition accounts for the 4% of dry materials total weight；
The additive used is aluminium powder, purity by weight 99%, and the mesh of granularity≤200, addition accounts for the 2% of dry materials total weight；
Magnesia powder, square iron miberal powder, alumina powder, phenolic resin, additive are premixed 25 minutes in sand mixer, mixing is equal
Premix powders are obtained after even；
Magnesia particle material further mixing 20 minutes are added in into above-mentioned premix powders, obtain tundish dry material.
The dry materials produced according to the method described above, after scene vibration construction and 200 DEG C of bakings, 2.68 g/ of bulk density
cm3, apparent porosity 22.1%, cold crushing strength 36.5MPa, service life 28 hours.
Embodiment 3：
The magnesite clinker of use accounts for the 83% of dry materials total weight.Wherein, MgO weight contents 90% in 3-1mm magnesia, addition accounts for
Dry materials total weight 35%；MgO weight contents 90% in 1-0mm magnesia, addition account for dry materials total weight 30% ,≤200 mesh magnesia
Middle content of MgO is 92%, and addition accounts for dry materials total weight 18%；
The purity by weight 95% of the square iron miberal powder of use, the mesh of granularity≤200, addition account for dry materials total weight 8%；
Al in the alumina powder of use2O3Content is 98.5%, and the mesh of granularity≤325, addition accounts for the 2% of dry materials total weight
For the carbonaceous binder used for phenolic resin, the weight content 45% of fixed C, addition accounts for the 4% of dry materials total weight；
The additive used is aluminium powder, purity by weight 98.5%, and the mesh of granularity≤200, addition accounts for the 2% of dry materials total weight；
Magnesia powder, square iron miberal powder, alumina powder, phenolic resin, additive in sand mixer are premixed 20 ~ 25 minutes, mixed
Premix powders are obtained after closing uniformly；
Magnesia particle material further mixing 15 ~ 20 minutes are added in into above-mentioned premix powders, obtain tundish dry material.
The dry materials produced according to the method described above, after scene vibration construction and 200 DEG C of bakings, 2.72 g/ of bulk density
cm3, apparent porosity 21.8%, cold crushing strength 36.1MPa, service life 32 hours.
Embodiment 4：
The magnesite clinker of use accounts for the 83% of dry materials total weight.Wherein, MgO weight contents 90% in 3-1mm magnesia, addition accounts for
Dry materials total weight 35%；MgO weight contents 90% in 1-0mm magnesia, addition account for dry materials total weight 30% ,≤200 mesh magnesia
Middle content of MgO is 92%, and addition accounts for dry materials total weight 18%；
The purity by weight 95% of the square iron miberal powder of use, the mesh of granularity≤200, addition account for dry materials total weight 10%；
Al in the alumina powder of use2O3Content is 98.5%, and the mesh of granularity≤325, addition accounts for the 1% of dry materials total weight
The carbonaceous binder used is industrial sucrose, the weight content 38% of fixed C, and addition accounts for the 5% of dry materials total weight；
The additive used is aluminium powder, purity by weight 98.5%, and the mesh of granularity≤200, addition accounts for the 2% of dry materials total weight；
Magnesia powder, square iron miberal powder, alumina powder, industrial sucrose, additive are premixed 25 minutes in sand mixer, mixing is equal
Premix powders are obtained after even；
Magnesia particle material further mixing 20 minutes are added in into above-mentioned premix powders, obtain tundish dry material.
The dry materials produced according to the method described above, after scene vibration construction and 200 DEG C of bakings, 2.74 g/ of bulk density
cm3, apparent porosity 22.4%, cold crushing strength 35.7MPa, service life 36 hours.
Claims (6)
1. a kind of tundish dry material, it is micro- that material composition includes 83 ~ 88% magnesite clinkers, 1 ~ 5% aluminium oxide by weight percentage
Powder, 4 ~ 5% carbonaceous binders, 2 ~ 3% additives, it is characterised in that also comprising 5 ~ 10% wustites.
2. a kind of tundish dry material according to claim 1, it is characterised in that FeO content >=95% in wustite, granularity
≤ 200 mesh.
3. a kind of tundish dry material according to claim 1, it is characterised in thatCarbonaceous binder includes phenolic resin, work At least one of industry sucrose, the mesh of granularity≤100.
4. a kind of tundish dry material according to claim 1, it is characterised in that additive is aluminium powder, silica flour and/or B4C
Powder, purity by weight >=98% of antioxidant, the mesh of granularity≤200.
5. the preparation method of a kind of tundish dry material as described in one of claim 1 ~ 4, it is characterised in that including following step
Suddenly：
（1）Magnesia powder, wustite, alumina powder, carbonaceous binder, additive are premixed 20 ~ 25 minutes in sand mixer,
Premix powders are obtained after mixing；
（2）Magnesia particle material further mixing 15 ~ 20 minutes are added in into above-mentioned premix powders, obtain tundish dry material.
A kind of 6. preparation method of tundish dry material according to claim 5, it is characterised in that the tundish dry
For material after vibration moulding, bulk density is 2.65 ~ 2.75g/cm3, apparent porosity, 21.4 ~ 22.3%, service life 24 ~ 36 is small
When.
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Cited By (7)
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|---|---|---|---|---|
| CN108526452A (en) * | 2018-04-19 | 2018-09-14 | 东北大学 | A kind of quick baking type tundish dry material and preparation method thereof |
| CN108840667A (en) * | 2018-07-30 | 2018-11-20 | 合肥铭佑高温技术有限公司 | A kind of preparation method of the high temperature resistant tundish dry material modified based on pyrophillite |
| CN109111234A (en) * | 2018-08-10 | 2019-01-01 | 河南弘盛再生资源利用有限公司 | Aluminium scrap ash reprocesses the formula and preparation method that homogeneous refractory raw material is made |
| CN109437938A (en) * | 2018-12-28 | 2019-03-08 | 江苏嘉耐高温材料有限公司 | A kind of liner in dundish castable |
| CN110128152A (en) * | 2019-05-13 | 2019-08-16 | 天津炜润达新材料科技有限公司 | A kind of tundish dry material and preparation method thereof |
| CN111116213A (en) * | 2019-02-21 | 2020-05-08 | 张家港市恒乐阳方高温材料有限公司 | Dry refractory material |
| CN113321492A (en) * | 2021-05-21 | 2021-08-31 | 泰州市旺鑫耐火材料有限公司 | Long-life tundish slag line dry material |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108526452A (en) * | 2018-04-19 | 2018-09-14 | 东北大学 | A kind of quick baking type tundish dry material and preparation method thereof |
| CN108840667A (en) * | 2018-07-30 | 2018-11-20 | 合肥铭佑高温技术有限公司 | A kind of preparation method of the high temperature resistant tundish dry material modified based on pyrophillite |
| CN109111234A (en) * | 2018-08-10 | 2019-01-01 | 河南弘盛再生资源利用有限公司 | Aluminium scrap ash reprocesses the formula and preparation method that homogeneous refractory raw material is made |
| CN109437938A (en) * | 2018-12-28 | 2019-03-08 | 江苏嘉耐高温材料有限公司 | A kind of liner in dundish castable |
| CN111116213A (en) * | 2019-02-21 | 2020-05-08 | 张家港市恒乐阳方高温材料有限公司 | Dry refractory material |
| CN110128152A (en) * | 2019-05-13 | 2019-08-16 | 天津炜润达新材料科技有限公司 | A kind of tundish dry material and preparation method thereof |
| CN113321492A (en) * | 2021-05-21 | 2021-08-31 | 泰州市旺鑫耐火材料有限公司 | Long-life tundish slag line dry material |
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