CN105665692B - A kind of long nozzle anti-thermal shock liner complex and its preparation process - Google Patents
A kind of long nozzle anti-thermal shock liner complex and its preparation process Download PDFInfo
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- CN105665692B CN105665692B CN201610171560.2A CN201610171560A CN105665692B CN 105665692 B CN105665692 B CN 105665692B CN 201610171560 A CN201610171560 A CN 201610171560A CN 105665692 B CN105665692 B CN 105665692B
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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
- B22D41/50—Pouring-nozzles
- B22D41/52—Manufacturing or repairing thereof
- B22D41/54—Manufacturing or repairing thereof characterised by the materials used therefor
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Abstract
A kind of long nozzle anti-thermal shock liner complex and its preparation process, the liner complex are made of the phenolic resin that 30 ~ 50% aggregates, 10 ~ 15% calcined aluminas, 30 ~ 50% high temperature pre-synthesis material, 10 ~ 15% magnesium carbonate and addition are aggregate, calcined alumina, high temperature pre-synthesis material and magnesium carbonate gross weight 6 ~ 10%；Preparation process is：Each raw material is weighed according to above-mentioned percentage by weight, after being mixed and stirred for uniformly, is placed in comminutor and hybrid particles is made, hybrid particles are pressed into liner complex by cold isostatic press.The liner complex contains a large amount of equally distributed micro- stomatas, thus with than common A12O3The much lower thermal conductivity of C-material.In addition, the liner complex has excellent thermal shock resistance.
Description
Technical field
The present invention relates to cast steel long nozzle, and in particular to a kind of long nozzle is with anti-thermal shock liner complex and its prepares work
Skill.
Background technology
Long nozzle is installed on below ladle, is A1 of the molten steel by ladle injection tundish2O3- C matter cylindrical channels,
Play a part of water conservancy diversion, prevent secondary oxidation of steel and splashing.It is to realize molten steel protective casting to improve the weight of billet quality
Functional refractory is wanted, can its service condition will directly influence whole casting process and be normally carried out.But in pouring molten steel
At initial stage, when red-hot molten steel flows through long nozzle, can produce very big thermal stress inside it, so as to cause its cracking.Therefore,
Long nozzle must be preheated to more than 1000 DEG C before use, and this not only consumes the energy, degradation manipulation environment, but also cause it more
Change cumbersome, time-consuming.The exploitation for exempting to preheat long nozzle is the key of solving the problem.
At present, the widely applied body for exempting to preheat composite construction long nozzle uses alumina-carbon material, and liner is using no carbon materials
Material.Its mechanism is：Insulating inner lining has less thermal conductivity factor, it reduces the rate of rise in temperature on the inside of long nozzle；And this
Body has higher thermal conductivity factor again, its flash heat transfer effect makes the temperature difference between long nozzle inner wall and outer wall obtain quickly
Alleviate, gather so as to effectively reduce the short-term of thermal stress, to prevent it from cracking.In addition, when composite construction long nozzle
When liner is thicker, also require its own that there is higher thermal shock resistance.The improvement of material and manufacturing process, is to improve long nozzle
The effective means of insulating inner lining thermal shock resistance.
Research shows, when the timing of material one of insulating inner lining, increase wherein pore amount is reduce its thermal conductivity factor effective
Method.In addition, introducing more stomatas in insulating inner lining, its elasticity modulus can be reduced, so as to improve its thermal shock resistance.
More stomatas are introduced in insulating inner lining, a kind of method is that aluminium oxide or Bubble zirconia are filled in inner lining material, but by
It is very low in the intensity of hollow ball, easily it is crushed when long nozzle is molded and does not have due effect.Including another method is
Appropriate graphite is filled in lining material, after long nozzle is burnt till, then air is passed through into its endoporus, liner is carried out at oxidation and decarbonization
Reason.Although the effect of this method is preferable, its technical process is relatively complicated and not easy to control.
To meet the needs of steel mill is to exempting to preheat long nozzle, the application is from the improvement of material and manufacturing process, and micro- gas
The two methods of introducing in hole are set about, and have developed a kind of long nozzle anti-thermal shock liner complex.
The content of the invention
The object of the present invention is to provide a kind of long nozzle anti-thermal shock liner complex and its preparation process.The liner is compound
Body has relatively low thermal conductivity factor, makes long nozzle be not required to preheat, and can keep good thermal shock resistance, the punching of resistance to molten steel for a long time
Brush.
The used to achieve the above object technical solution of the present invention is：A kind of long nozzle anti-thermal shock liner complex,
It is made of aggregate, calcined alumina, high temperature pre-synthesis material, magnesium carbonate and phenolic resin, the percentage by weight of each material is：Aggregate
30 ~ 50%, calcined alumina 10 ~ 15%, high temperature pre-synthesis material 30 ~ 50%, magnesium carbonate 10 ~ 15%, the addition of phenolic resin is bone
Material, calcined alumina, the 6 ~ 10% of high temperature pre-synthesis material and magnesium carbonate gross weight, wherein, high temperature pre-synthesis material is Al2O3-MgO-
TiO2Synthesis material；Contain Al inside the liner complex1.8Mg0.1Ti1.1O5Phase.
Further, high temperature pre-synthesis material is prepared by following technique：40 ~ 60% are followed successively by using percentage by weight
Al2O3Powder, 5 ~ 10% MgO powder, 30 ~ 50% TiO2More than powder mixing 16h, is placed in high temperature furnace, is protected at 1500 ~ 1800 DEG C
3 ~ 6h of temperature, wherein, Al2O3Powder, MgO powder and TiO2The particle mean size of powder is no more than 10 microns.
In the present invention, aggregate is prepared by following technique：（1）, according to 1：3：3 weight ratio, weighs microcapsule powder, two
Titanium oxide and absolute ethyl alcohol, after mixing under the frequency of 45KHz ultrasonic disperse 25min, be then 0.098MPa in vacuum
Filtered under vacuum condition, when there is no stopping filtering during ethanol drips, taking-up much filtrate, is placed in baking oven, successively
The drying of 30 DEG C × 6h and the preheating of 50 DEG C × 20min are carried out, the material after preheating is taken out and is placed in forcing press
Precompressed 5min under 2MPa pressure, then the hot pressing 30min under the conditions of 5MPa, 150 ~ 160 DEG C again, after cooled to room temperature, system
Titanium dioxide microcapsule powder is obtained, it is spare；
（2）, be followed successively by using percentage by weight 60 ~ 70% electro-corundum, 28 ~ 34% magnesia, 2 ~ 6% titanium dioxide
Microcapsule powder is mixed, and is added weight and accounted for the outer of electro-corundum, magnesia and titanium dioxide microcapsule powder gross weight 1 ~ 2.5%
Add agent, after mixing 1.5h, 3 ~ 5h is preheated at 110 ~ 115 DEG C, 2 ~ 3h is then kept the temperature at 1400 ~ 1600 DEG C.
In the present invention, the impurity content in the magnesium carbonate is not more than the 5% of its dead weight, and particle mean size is not more than 5 microns.
A kind of preparation process of long nozzle anti-thermal shock liner complex, according to above-mentioned percentage by weight weigh aggregate,
Calcined alumina, high temperature pre-synthesis material, magnesium carbonate and phenolic resin, be mixed and stirred for uniformly after, be placed in comminutor be made it is mixed
Particle is closed, hybrid particles are pressed into liner complex by cold isostatic press.
In the present invention, titanium dioxide microcapsule powder has the balancing effect of stress concentration, can absorb long nozzle and exist
Impact force during use, reduces its contraction distortion amount；The high fluidity and small-size effect of titanium dioxide microcapsule powder,
Make inner lining surface finer and close thin clean, and greatly enhance the resistance to slag of liner.Microencapsulation make it that titanium dioxide fine particles are mutual
Isolation, promotes it scattered in aggregate, can largely absorb frictional heat, play the role of delaying long nozzle temperature to rise；Moreover,
Titanium dioxide makes liner complex apply when on long nozzle, reduces the crystallite dimension of glass phase and crystalline phase.
The liner complex of the present invention is applied when on long nozzle, and decomposition reaction takes place more than 540 DEG C in magnesium carbonate,
Generation MgO simultaneously discharges CO2, a large amount of micro- stomatas are formed, so as to effectively reduce the thermal conductivity factor of inner lining material and elasticity modulus.
The MgO of above-mentioned formation is further reacted with calcined alumina, generates magnesium aluminate spinel in situ.
Beneficial effect：The liner complex contains a large amount of equally distributed micro- stomatas, thus with than common A12O3-C
The much lower thermal conductivity of material.Wherein, the Al contained1.8Mg0.1Ti1.1O5Phase, improves the thermal shock resistance of material.The liner material
Material plays the role of a heat blocking, can effectively reduce the long nozzle body thermal stress suffered when molten steel starts cast；
The present invention is free of vitreous silica, in use the reaction in-situ sintering during again thermally treated and use, can be preferable
Ground resistance molten steel is washed away and deteriorated；The inner lining material has relatively low coefficient of thermal expansion and elasticity modulus, thus its own heat is swollen
Thermal stress caused by swollen influences long nozzle body smaller.In addition, because the inner lining material and bulk material are in mechanical property
Have differences, so the interface between them can also play the role of suppressing crack propagation.
Brief description of the drawings
Fig. 1 is to combine long nozzle structure diagram prepared by liner complex of the present invention.
Reference numeral：1st, long nozzle body；2nd, liner complex.
Embodiment
With reference to specific embodiment to the present invention long nozzle anti-thermal shock liner complex and its preparation process make into
One step illustrates that so that those skilled in the art can be better understood from the present invention and can be practiced, but illustrated embodiment is not
As limitation of the invention.
A kind of long nozzle anti-thermal shock liner complex, by aggregate, calcined alumina, high temperature pre-synthesis material, magnesium carbonate and
Phenolic resin forms, and the percentage by weight of each material is：Aggregate 30 ~ 50%, calcined alumina 10 ~ 15%, high temperature pre-synthesis material 30 ~
50%th, magnesium carbonate 10 ~ 15%, the addition of phenolic resin is aggregate, calcined alumina, high temperature pre-synthesis material and magnesium carbonate gross weight
6 ~ 10%, wherein, high temperature pre-synthesis material is Al2O3-MgO-TiO2Synthesis material；Contain inside the liner complex
Al1.8Mg0.1Ti1.1O5Phase.
Wherein, the impurity content in the magnesium carbonate is not more than the 5% of its dead weight, and particle mean size is not more than 5 microns.
Embodiment 1
A kind of preparation process of long nozzle anti-thermal shock liner complex, the liner complex by aggregate, calcined alumina,
High temperature pre-synthesis material, magnesium carbonate and phenolic resin composition, the percentage by weight of each material are：Aggregate 40%, calcined alumina 10%,
High temperature pre-synthesis material 40%, magnesium carbonate 10%, the addition of phenolic resin is aggregate, calcined alumina, high temperature pre-synthesis material and carbon
The 8% of sour magnesium gross weight, wherein, high temperature pre-synthesis material is Al2O3-MgO-TiO2Synthesis material；Contain inside the liner complex
Al1.8Mg0.1Ti1.1O5Phase, comprises the following steps：
Step 1: according to 1：3：3 weight ratio, weighs microcapsule powder, titanium dioxide and absolute ethyl alcohol, after mixing
Ultrasonic disperse 25min under the frequency of 45KHz, is then filtered in the case where vacuum is the vacuum condition of 0.098MPa, when no longer
Stop filtering when having an ethanol drips, take out much filtrate, be placed in baking oven, carry out successively 30 DEG C × 6h drying and 50 DEG C ×
The preheating of 20min, takes out the material after preheating and is placed in forcing press the precompressed 5min under 2MPa pressure, then exist again
5MPa, hot pressing 30min under the conditions of 150 DEG C, after cooled to room temperature, are made titanium dioxide microcapsule powder, spare；
Step 2: 65% electro-corundum, 31% magnesia, 4% titanium dioxide microcapsule are followed successively by using percentage by weight
Powder is mixed, and adds the additive that weight accounts for electro-corundum, magnesia and titanium dioxide microcapsule powder gross weight 1.5%, mixing
After 1.5h, 3h is preheated at 115 DEG C, then keeps the temperature 2h at 1600 DEG C, aggregate is made, it is spare；
Step 3: 60% Al is followed successively by using percentage by weight2O3Powder, 10% MgO powder, 30% TiO2Powder mixing 20h,
It is placed in high temperature furnace, 3h is kept the temperature at 1800 DEG C, high temperature pre-synthesis material is made；Wherein, Al2O3Powder, MgO powder and TiO2Powder is put down
Equal granularity is no more than 10 microns；
Step 4: prepared by aggregate, calcined alumina, step 3 that step 2 preparation is weighed according to the percentage by weight
High temperature pre-synthesis material, magnesium carbonate and phenolic resin, be mixed and stirred for uniformly after, be placed in comminutor and hybrid particles be made, will
Hybrid particles are pressed into liner complex by cold isostatic press.
Embodiment 2
A kind of preparation process of long nozzle anti-thermal shock liner complex, the liner complex by aggregate, calcined alumina,
High temperature pre-synthesis material, magnesium carbonate and phenolic resin composition, the percentage by weight of each material are：Aggregate 40%, calcined alumina 15%,
High temperature pre-synthesis material 30%, magnesium carbonate 15%, the addition of phenolic resin is aggregate, calcined alumina, high temperature pre-synthesis material and carbon
The 10% of sour magnesium gross weight, wherein, high temperature pre-synthesis material is Al2O3-MgO-TiO2Synthesis material；Contain inside the liner complex
Al1.8Mg0.1Ti1.1O5Phase.Aggregate, calcined alumina, high temperature pre-synthesis material, magnesium carbonate are weighed according to the percentage by weight
And phenolic resin, after being mixed and stirred for uniformly, it is placed in comminutor and hybrid particles is made, hybrid particles are passed through into cold isostatic press
It is pressed into liner complex.Wherein, the preparation process of aggregate, high temperature pre-synthesis material is with reference to embodiment 1.
Embodiment 3
A kind of preparation process of long nozzle anti-thermal shock liner complex, the liner complex by aggregate, calcined alumina,
High temperature pre-synthesis material, magnesium carbonate and phenolic resin composition, the percentage by weight of each material are：Aggregate 50%, calcined alumina 10%,
High temperature pre-synthesis material 30%, magnesium carbonate 10%, the addition of phenolic resin is aggregate, calcined alumina, high temperature pre-synthesis material and carbon
The 6% of sour magnesium gross weight, wherein, high temperature pre-synthesis material is Al2O3-MgO-TiO2Synthesis material；Contain inside the liner complex
Al1.8Mg0.1Ti1.1O5Phase, comprises the following steps：
Step 1: according to 1：3：3 weight ratio, weighs microcapsule powder, titanium dioxide and absolute ethyl alcohol, after mixing
Ultrasonic disperse 25min under the frequency of 45KHz, is then filtered in the case where vacuum is the vacuum condition of 0.098MPa, when no longer
Stop filtering when having an ethanol drips, take out much filtrate, be placed in baking oven, carry out successively 30 DEG C × 6h drying and 50 DEG C ×
The preheating of 20min, takes out the material after preheating and is placed in forcing press the precompressed 5min under 2MPa pressure, then exist again
5MPa, hot pressing 30min under the conditions of 160 DEG C, after cooled to room temperature, are made titanium dioxide microcapsule powder, spare；
Step 2: 70% electro-corundum, 28% magnesia, 2% titanium dioxide microcapsule are followed successively by using percentage by weight
Powder is mixed, and adds the additive that weight accounts for electro-corundum, magnesia and titanium dioxide microcapsule powder gross weight 2.5%, mixing
After 1.5h, 5h is preheated at 110 DEG C, then keeps the temperature 3h at 1400 DEG C, aggregate is made, it is spare；
Step 3: 40% Al is followed successively by using percentage by weight2O3Powder, 10% MgO powder, 50% TiO2Powder mixing 25h,
It is placed in high temperature furnace, 6h is kept the temperature at 1500 DEG C, high temperature pre-synthesis material is made；Wherein, Al2O3Powder, MgO powder and TiO2Powder is put down
Equal granularity is no more than 10 microns；
Step 4: prepared by aggregate, calcined alumina, step 3 that step 2 preparation is weighed according to the percentage by weight
High temperature pre-synthesis material, magnesium carbonate and phenolic resin, be mixed and stirred for uniformly after, be placed in comminutor and hybrid particles be made, will
Hybrid particles are pressed into liner complex by cold isostatic press.
Embodiment 4
A kind of preparation process of long nozzle anti-thermal shock liner complex, the liner complex by aggregate, calcined alumina,
High temperature pre-synthesis material, magnesium carbonate and phenolic resin composition, the percentage by weight of each material are：Aggregate 35%, calcined alumina 15%,
High temperature pre-synthesis material 35%, magnesium carbonate 15%, the addition of phenolic resin is aggregate, calcined alumina, high temperature pre-synthesis material and carbon
The 9% of sour magnesium gross weight, wherein, high temperature pre-synthesis material is Al2O3-MgO-TiO2Synthesis material；Contain inside the liner complex
Al1.8Mg0.1Ti1.1O5Phase, comprises the following steps：
Step 1: according to 1：3：3 weight ratio, weighs microcapsule powder, titanium dioxide and absolute ethyl alcohol, after mixing
Ultrasonic disperse 25min under the frequency of 45KHz, is then filtered in the case where vacuum is the vacuum condition of 0.098MPa, when no longer
Stop filtering when having an ethanol drips, take out much filtrate, be placed in baking oven, carry out successively 30 DEG C × 6h drying and 50 DEG C ×
The preheating of 20min, takes out the material after preheating and is placed in forcing press the precompressed 5min under 2MPa pressure, then exist again
5MPa, hot pressing 30min under the conditions of 157 DEG C, after cooled to room temperature, are made titanium dioxide microcapsule powder, spare；
Step 2: 65% electro-corundum, 31% magnesia, 4% titanium dioxide microcapsule are followed successively by using percentage by weight
Powder is mixed, and adds the additive that weight accounts for electro-corundum, magnesia and titanium dioxide microcapsule powder gross weight 1.5%, mixing
After 1.5h, 3h is preheated at 115 DEG C, then keeps the temperature 2h at 1600 DEG C, aggregate is made, it is spare；
Step 3: 52% Al is followed successively by using percentage by weight2O3Powder, 8% MgO powder, 40% TiO2Powder mixing 18h,
It is placed in high temperature furnace, 4.5h is kept the temperature at 1400 DEG C, high temperature pre-synthesis material is made；Wherein, Al2O3Powder, MgO powder and TiO2Powder
Particle mean size is no more than 10 microns；
Step 4: prepared by aggregate, calcined alumina, step 3 that step 2 preparation is weighed according to the percentage by weight
High temperature pre-synthesis material, magnesium carbonate and phenolic resin, be mixed and stirred for uniformly after, be placed in comminutor and hybrid particles be made, will
Hybrid particles are pressed into liner complex by cold isostatic press.
Embodiment 5
A kind of preparation process of long nozzle anti-thermal shock liner complex, the liner complex by aggregate, calcined alumina,
High temperature pre-synthesis material, magnesium carbonate and phenolic resin composition, the percentage by weight of each material are：Aggregate 30%, calcined alumina 10%,
High temperature pre-synthesis material 50%, magnesium carbonate 10%, the addition of phenolic resin is aggregate, calcined alumina, high temperature pre-synthesis material and carbon
The 8% of sour magnesium gross weight, wherein, high temperature pre-synthesis material is Al2O3-MgO-TiO2Synthesis material；Contain inside the liner complex
Al1.8Mg0.1Ti1.1O5Phase.Aggregate, calcined alumina, high temperature pre-synthesis material, magnesium carbonate are weighed according to the percentage by weight
And phenolic resin, after being mixed and stirred for uniformly, it is placed in comminutor and hybrid particles is made, hybrid particles are passed through into cold isostatic press
It is pressed into liner complex.Wherein, the preparation process of aggregate, high temperature pre-synthesis material is with reference to embodiment 3.
For examine the performance of long nozzle inner lining material of the present invention and its and bulk material combination situation, prepare and be not added with carbon
The control sample of sour magnesium, and sample 1- samples 5.The composition of 5 inner lining material of sample 1- samples is respectively as embodiment 1- is real
Apply example 5.The dispensing of control sample inner lining material is magnesium aluminate spinel 50wt%, calcined alumina 10wt%, Al2O3-MgO-TiO2Close
Into material 40wt%；Bonding agent phenolic resin addition is the 8% of inner lining material gross weight.The dispensing of used bulk material is electricity
Molten diamantane 52wt%；Calcined alumina 15wt%；Crystalline flake graphite 27wt%；Carborundum powder 5wt%；Boron carbide 1wt%；Bonding agent phenol
Urea formaldehyde is the 9% of dispensing gross weight.
Above-mentioned each inner lining material and bulk material are uniformly mixed in muller respectively, and 24h is dried in 60 DEG C.Will be upper
State each sample to suppress under 150MPa pressure, first suppress one layer of bulk material layer, then one layer of the upper press in bulk material layer
Lining material, be finally prepared to length be 140mm, width 35mm, highly the examination body for 35mm, wherein upper inner liner material
Thickness about 5mm, lower body material thickness about 30mm.It is meanwhile the inner lining material of each sample is separately formed with same pressure.Shaping
Each sample afterwards is heat-treated 3h in 1300 DEG C under nitrogen atmosphere after 120 DEG C of dry 24h.
Control sample, and the apparent porosity of 5 inner lining material of sample 1- samples are measured respectively, while observe each sample liner
And the combination situation of body, the results are shown in Table shown in 1.
1 control sample of table and embodiment 1-5 sample performances
According to result shown in table 1, the combination of the liner and body of all samples is all right, the heat of each inner lining material
The coefficient of expansion is also not much different.But compared with control sample, sample 1- samples 5 have larger apparent porosity, thus should have
Lower thermal conductivity factor and elasticity modulus.Moreover, after carrying out 5 thermal shocks respectively to 5 samples, remaining bending strength exists
More than 25MPa, for strength retention more than 90%, thermal shock resistance is excellent.
Claims (2)
- A kind of 1. long nozzle anti-thermal shock liner complex, it is characterised in that：By aggregate, calcined alumina, high temperature pre-synthesis material, Magnesium carbonate and phenolic resin composition, aggregate, calcined alumina, high temperature pre-synthesis material and magnesium carbonate gross weight meter 100%, each material Percentage by weight be：Aggregate 30 ~ 50%, calcined alumina 10 ~ 15%, high temperature pre-synthesis material 30 ~ 50%, magnesium carbonate 10 ~ 15%, phenol The addition of urea formaldehyde is the 6 ~ 10% of aggregate, calcined alumina, high temperature pre-synthesis material and magnesium carbonate gross weight, wherein, high temperature is pre- Synthesis material is Al2O3-MgO-TiO2Synthesis material, high temperature pre-synthesis material are prepared by following technique：Using percentage by weight successively For 40 ~ 60% Al2O3Powder, 5 ~ 10% MgO powder, 30 ~ 50% TiO2More than powder mixing 16h, is placed in high temperature furnace, 1500 ~ 3 ~ 6h is kept the temperature at 1800 DEG C, wherein, Al2O3Powder, MgO powder and TiO2The particle mean size of powder is no more than 10 microns；The liner is answered Contain Al in fit inside1.8Mg0.1Ti1.1O5Phase, the impurity content in magnesium carbonate are not more than the 5% of its dead weight, and particle mean size is little In 5 microns；Wherein, aggregate is prepared by following technique：（1）, according to 1：3：3 weight ratio, weighs microcapsule powder, titanium dioxide Titanium and absolute ethyl alcohol, after mixing under the frequency of 45KHz ultrasonic disperse 25min, then vacuum be 0.098MPa vacuum Under the conditions of filtered, when there is no during ethanol drips stop filter, take out much filtrate, be placed in baking oven, carry out successively The drying of 30 DEG C × 6h and the preheating of 50 DEG C × 20min, take out the material after preheating and are placed in forcing press and pressed in 2MPa Precompressed 5min under power, then the hot pressing 30min under the conditions of 5MPa, 150 ~ 160 DEG C again, after cooled to room temperature, are made dioxy Change titanium microcapsule powder, it is spare；（2）, be followed successively by using percentage by weight 60 ~ 70% electro-corundum, 28 ~ 34% magnesia, the micro- glue of 2 ~ 6% titanium dioxide Capsule powder is mixed, and adds the additive that weight accounts for electro-corundum, magnesia and titanium dioxide microcapsule powder gross weight 1 ~ 2.5%, After mixing 1.5h, 3 ~ 5h is preheated at 110 ~ 115 DEG C, 2 ~ 3h is then kept the temperature at 1400 ~ 1600 DEG C.
- A kind of 2. preparation process of long nozzle anti-thermal shock liner complex as claimed in claim 1, it is characterised in that：According to Percentage by weight described in claim 1 weighs aggregate, calcined alumina, high temperature pre-synthesis material, magnesium carbonate and phenolic resin, mixes After merging stirs evenly, it is placed in comminutor and hybrid particles is made, hybrid particles are pressed into liner by cold isostatic press answers It is fit.
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