CN108585902A - A kind of reinforcing refractory brick of pressure resistance anticracking - Google Patents
A kind of reinforcing refractory brick of pressure resistance anticracking Download PDFInfo
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Abstract
The present invention relates to high-temperature refractory technical fields, and in particular to a kind of reinforcing refractory brick of pressure resistance anticracking.The raw material components of refractory brick include：Corundum aggregate, alumina powder, silicon carbide micro-powder, mullite powder, aquamaine mountain flour, nano zircite, reinforcing fiber, polymerization Silica hydrogel, sintering aid, water.Wherein reinforcing fiber is a kind of ceramic fibre material prepared by electrostatic spinning and high-temperature roasting technology, the refractoriness and intensity of this ceramic fibre material are fine, ceramic fibre surface is by roughening treatment and is consolidated with silicon carbide whisker, combination effect between the material and refractory brick main body are gathered materials is very good, can significantly increase the compressive resistance and cracking resistance of refractory brick.
Description
Technical field
The present invention relates to high-temperature refractory technical fields, and in particular to a kind of reinforcing refractory brick of pressure resistance anticracking.
Background technology
Refractory brick is a kind of refractory material being fired into refractory clay or other refractory raw materials.It is faint yellow or with brown,
It is mainly used for building smelting furnace, is resistant to 1580-1770 DEG C of high temperature.Refractory brick is generally divided into two kinds, i.e., amorphous refractory and
Sizing refractory material.Amorphous refractory：Also it is castable, is by a variety of aggregates or to gather materials and one or more bonding agent groups
At mixing powdery pellet, must coordinate with one or more liquid when use and stir evenly, there is stronger mobility.Sizing
Refractory material：General refractory brick processed, shape have standard rule, can also build interim processing when cutting as needed.
According to the difference of refractory brick ingredient, refractory brick in the market can substantially be divided into five major class, including the fire resisting of sial system
Brick, alkaline series refractory brick, carbon containing refractory brick, refractory brick containing zirconium and insulating fire brick.The firing chamber of Industrial Stoves is most of not
It is to need different refractory brick being collocated with each other use made of the laying fireproof bricks by single type；Different parts in kiln
Can according to refractoriness demand and selected using the state of medium.
Refractory brick can only be prepared since the refractoriness requirement to brick body is very high using special refractory material, resistance to
Fire turns to use under long-term hot environment, is very easy to weathering aging, the intensity of brick body can with the extension of service life and
It reduces, especially under the shear action by side knock, brick body, which can be broken or be formed, to be split, and use value is lost.Common brick
Body can add a small amount of fibrous material to improve intensity in brick body；But fire resisting of the brick body of refractory brick to fibrous material
Degree and intensity requirement higher, most fibrous material are extremely difficult to such performance indicator.Some aluminum ceramic fibres it is resistance to
Fiery degree is preferable, can apply in refractory brick preparation process, but the intensity of this fibrous material also needs to improve, and because
The limitation of production technology causes the surface flatness of the fiber prepared higher, poor with other combinations gathered materials, to fire resisting
The promotion effect of brick integral strength is limited.
Invention content
For problems of the prior art, the present invention provides a kind of reinforcing refractory brick of pressure-resistant anticracking, the type is resistance to
A kind of special reinforcing fiber is used in firebrick so that the refractoriness and intensity of refractory brick get a promotion, and have been improved particularly brick
The compressive resistance and cracking resistance of body.
In order to achieve the above object, the present invention is achieved through the following technical solutions：
A kind of reinforcing refractory brick of pressure resistance anticracking, according to mass fraction, the raw material components of refractory brick include：Corundum aggregate 20-25
Part, 50-60 parts of alumina powder, 5-9 parts of silicon carbide micro-powder, 13-15 parts of mullite powder, 12-16 parts of aquamaine mountain flour are nano oxidized
2-5 parts of zirconium, 10-13 parts of reinforcing fiber polymerize 9-14 parts of Silica hydrogel, 0.2-0.5 parts of sintering aid, 25-30 parts of water.
Preferably, according to mass fraction, the raw material components of refractory brick include：22-24 parts of corundum aggregate, alumina powder
54-57 parts, 6-8 parts of silicon carbide micro-powder, 14-15 parts of mullite powder, 13-15 parts of aquamaine mountain flour, 3-4 parts of nano zircite, reinforcing
11-12 parts of fiber polymerize 10-13 parts of Silica hydrogel, 0.3-0.4 parts of sintering aid, 26-28 parts of water.
It is further preferred that according to mass fraction, the raw material components of refractory brick include：23 parts of corundum aggregate, aluminium oxide is micro-
55 parts of powder, 7 parts of silicon carbide micro-powder, 15 parts of mullite powder, 14 parts of aquamaine mountain flour, 3.5 parts of nano zircite, 11 parts of reinforcing fiber,
It polymerize 12 parts of Silica hydrogel, 0.4 part of sintering aid, 27 parts of water.
In the present invention, the preparation method of reinforcing fiber includes the following steps：
（1）According to mass percent, prepare ceramic raw material：Calcium hydroxide 6.5-8.6%, colloidal silicon dioxide 20.5-22.3%, two
Titanium oxide 1.5-2.3%, magnesium sulfate 4.5-6.3%, yttrium carbonate 0.02-0.04%, sodium carbonate 9.4-11.7%, surplus are aluminum nitrate；
Ceramic raw material is added to ball milling mixing in ball mill, obtains required fibrous matter source；
（2）According to mass percent, by the fibrous matter source of 15.3wt%, the polyvinyl alcohol of 9.7wt%, the polycyclic oxygen third of 3.6wt%
Alkane, the lauric monoethanolamide of 0.8wt%, the glycine betaine of 2.8wt%；It is add to deionized water decentralized processing, then to group
It closes and acetic acid is added dropwise in liquid, the pH value for adjusting combination liquid is 3.8-4.5, obtains required fibrous matter liquid；
（3）Fibrous matter liquid is added in the liquid storage container of electrospinning device, spinning spout of the fibrous matter liquid from equipment
It projects, is acted on by the high voltage power supply of 15.5-18.0kV, fibrous matter liquid directive collector, the volatile matter in fibrous matter liquid
After volatilization, collection obtains spinning fibre, and spinning fibre is sent in high temperature furnace, is burnt into 1050-1200 DEG C of high-temperature
2.5-3h obtains required ceramic fibre；A diameter of 120-150nm of ceramic fibre；
（4）It is dry after ceramic fibre is washed with deionized, it is then fed into acidizing corrosion process chamber, acidizing corrosion processing
Interior is full hydrogen chloride steam, and steam pressure 0.8-1.0MPa, the indoor temperature of acidizing corrosion processing is 150-160 DEG C,
Acidizing corrosion processing time is 4-7s, and after treatment takes out the fiber after acidizing corrosion, and 3-5 is rinsed repeatedly with deionized water
It is secondary, until cleaning solution is in neutrality；
（5）According to mass percent, by the superfine silicon carbide whisker of 13wt%, the polyvinyl butyral of 0.8wt%, 0.6wt%'s
The triethyl phosphate of propionic acid alcohol and 2wt% are added in isopropanol solvent, and ultrasonic wave decentralized processing obtains whisker maceration extract, will be upper
The ceramic fibre of step is immersed in whisker maceration extract and handles 10-15min, then takes out ceramic fibre, is sent to high temperature furnace
In, 30-40min is burnt into 480-560 DEG C of temperature, product cooled to room temperature will be burnt into, obtain required reinforcing fiber.
Wherein, step（3）And step（5）In high temperature furnace sintering process in be all made of nitrogen atmosphere and protected.
Step（5）The grain size of middle superfine silicon carbide whisker is 50-55nm.
Preferably, the grain size of corundum aggregate is 1-3mm；The clipped machine of reinforcing fiber used is chopped, the fiber after being chopped
Length is 3-5mm.
Corundum not only has high hardness, also has very outstanding fire resistance, makes as aggregate in refractory brick
With the mechanical strength of refractory brick can be significantly improved.
Preferably, magnesia, yttrium oxide and lanthanum chloride are contained in sintering aid, the mass ratio of three is 8:1:1.
The use of sintering aid can enhance the sintering character of refractory brick, the case where not influencing sintered refractory block quality
Under, contribute to the temperature for suitably reducing sintering, widens the particle size range of particulate constituent.In addition, the presence of sintering aid is also advantageous
Interparticles spaces it is reasonably combined, improve the intensity of molding blank, make the green body that can carry out special-shaped processing appropriate, and improve burning
Junction efficiency.
The preparation method of refractory brick provided by the invention is：Prepare each raw material component according to mass fraction, aluminium oxide is micro-
It is equal that powder, silicon carbide micro-powder, mullite powder, aquamaine mountain flour, nano zircite and sintering aid are added to ball milling mixing in ball mill
It is even, then mixture is added to together with corundum aggregate, reinforcing fiber, polymerization Silica hydrogel and water in batch mixer and is stirred evenly,
Slurry is obtained, slurry is injected into compression moulding in mold, then adobe is sent to high temperature kiln by drying at room temperature 6-10h after demoulding
Furnace temperature when roasting, is risen to 850-900 DEG C, heat preservation roasting 1-1.5h, so by middle roasting with the heating rate of 5-8 DEG C/min first
Furnace temperature is increased to 1500-1550 DEG C with 7-10 DEG C of heating rate afterwards, continues high-temperature roasting 0.5-1.5h, then by furnace temperature with
The rate of 12-15 DEG C/min is down to 1150-1200 DEG C, and furnace temperature is finally reduced to room temperature, brick body is come out of the stove by heat preservation roasting 3-6h
It is cooling.
Wherein, moisture content when fire resisting brick adobe is sent to high temperature roasting in kilns is not higher than 8%.
High-moisture percentage is easy to cause brick body and blisters and deform in sintering process, reduces the intensity of brick body, it is therefore desirable to empty
Water content when brick body sintering is controlled, and by slow pre-heating temperature elevation, gradually reduces the moisture of adobe, avoids the formation of air gap,
Lead to the dusting of brick body surface layer.
The present invention has following advantageous effect：
The refractory brick of the present invention is prepared using the base-material of a variety of high rigidity, high refractoriness, and is made using corundum as aggregate
With the intensity of brick body is very high.Wherein for the compressive resistance and bend-resistance performance that improve refractory brick, one kind has been used in gathering materials
Special fibrous material, this reinforcing fiber are prepared using electrostatic spinning and high-temperature roasting technology, are a kind of refractories
The refractoriness of fiber, fiber is very high, and tensile strength is also very outstanding, is suitble to be used as strengthening material in refractory brick.
Wherein, in order to improve the ceramic fibre and refractory brick is other gather materials between combination effect, it is specially rotten using atomization
Erosion technology is roughened fiber surface, and nanometer silicon carbide whiskers roasting is then solidificated in fiber surface again, to
So that the intensity higher of ceramic fibre, and promote ceramic fibre and brick body gather materials between interaction；So that the fire resisting prepared
The intensity of brick is significantly improved, and the bend-resistance performance and seismic crack effect of obtained refractory brick are more preferable.
Specific implementation mode
The specific implementation mode of the present invention is further described with reference to embodiment, following embodiment is only used for more
Technical scheme of the present invention is clearly demonstrated, and not intended to limit the protection scope of the present invention.
In following embodiment, the preparation method of reinforcing fiber includes the following steps：
（1）According to mass percent, prepare ceramic raw material：Calcium hydroxide 7.2%, colloidal silicon dioxide 21.5%, titanium dioxide
1.8%, magnesium sulfate 5.4%, yttrium carbonate 0.03%, sodium carbonate 10.2%, surplus is aluminum nitrate；Ceramic raw material is added in ball mill
Ball milling mixing, obtain required fibrous matter source；
（2）According to mass percent, by the fibrous matter source of 15.3wt%, the polyvinyl alcohol of 9.7wt%, the polycyclic oxygen third of 3.6wt%
Alkane, the lauric monoethanolamide of 0.8wt%, the glycine betaine of 2.8wt%；It is add to deionized water decentralized processing, then to group
It closes and acetic acid is added dropwise in liquid, the pH value for adjusting combination liquid is 4.2, obtains required fibrous matter liquid；
（3）Fibrous matter liquid is added in the liquid storage container of electrospinning device, spinning spout of the fibrous matter liquid from equipment
It projects, is acted on by the high voltage power supply of 17.0kV, fibrous matter liquid directive collector, the volatile matter volatilization in fibrous matter liquid
Afterwards, it collects and obtains spinning fibre, spinning fibre is sent in high temperature furnace, 2.7h is burnt into 1100 DEG C of high-temperature, is obtained
Required ceramic fibre；A diameter of 120-150nm of ceramic fibre；
（4）It is dry after ceramic fibre is washed with deionized, it is then fed into acidizing corrosion process chamber, acidizing corrosion processing
Interior is full hydrogen chloride steam, and steam pressure 0.9MPa, the indoor temperature of acidizing corrosion processing is 155 DEG C, acidizing corrosion
Processing time is 5s, and the fiber after acidizing corrosion is taken out, rinsed repeatedly with deionized water 4 times, until cleaning solution by after treatment
It is in neutrality；
（5）According to mass percent, by the superfine silicon carbide whisker of 13wt%, the polyvinyl butyral of 0.8wt%, 0.6wt%'s
The triethyl phosphate of propionic acid alcohol and 2wt% are added in isopropanol solvent, and ultrasonic wave decentralized processing obtains whisker maceration extract, will be upper
The ceramic fibre of step is immersed in whisker maceration extract and handles 13min, then takes out ceramic fibre, is sent in high temperature furnace,
It is burnt into 35min with 500 DEG C of temperature, product cooled to room temperature will be burnt into, obtain required reinforcing fiber.
Wherein, step（3）And step（5）In high temperature furnace sintering process in be all made of nitrogen atmosphere and protected.
Step（5）The grain size of middle superfine silicon carbide whisker is 50-55nm.
Embodiment 1
A kind of reinforcing refractory brick of pressure resistance anticracking, according to mass fraction, the raw material components of refractory brick include：20 parts of corundum aggregate,
50 parts of alumina powder, 5 parts of silicon carbide micro-powder, 13 parts of mullite powder, 12 parts of aquamaine mountain flour, 2 parts of nano zircite, reinforcing fiber
10 parts, it polymerize 9 parts of Silica hydrogel, 0.2 part of sintering aid, 25 parts of water.
Wherein, the grain size of corundum aggregate is 1-3mm；The clipped machine of reinforcing fiber used is chopped, and the fiber after being chopped is long
Degree is 3-5mm.
Contain magnesia, yttrium oxide and lanthanum chloride in sintering aid, the mass ratio of three is 8:1:1.
The preparation method of refractory brick provided in this embodiment is：Prepare each raw material component according to mass fraction, by aluminium oxide
Micro mist, silicon carbide micro-powder, mullite powder, aquamaine mountain flour, nano zircite and sintering aid are added to ball milling mixing in ball mill
Uniformly, then mixture is added to together with corundum aggregate, reinforcing fiber, polymerization Silica hydrogel and water in batch mixer and is stirred
It is even, slurry is obtained, slurry is injected into compression moulding in mold, then adobe is sent to high temperature kiln by drying at room temperature 6h after demoulding
Middle roasting, moisture content when fire resisting brick adobe is sent to high temperature roasting in kilns are not higher than 8%；When roasting, first with 5 DEG C/min's
Furnace temperature is risen to 850 DEG C by heating rate, then furnace temperature is increased to 1500 DEG C with 7 DEG C of heating rate, continued by heat preservation roasting 1h
High-temperature roasting 0.5h, then furnace temperature is down to 1150 DEG C with the rate of 12 DEG C/min, furnace temperature is finally reduced to room by heat preservation roasting 3h
Temperature comes out of the stove brick body cooling.
Embodiment 2
A kind of reinforcing refractory brick of pressure resistance anticracking, according to mass fraction, the raw material components of refractory brick include：25 parts of corundum aggregate,
60 parts of alumina powder, 9 parts of silicon carbide micro-powder, 15 parts of mullite powder, 16 parts of aquamaine mountain flour, 5 parts of nano zircite, reinforcing fiber
13 parts, it polymerize 14 parts of Silica hydrogel, 0.5 part of sintering aid, 30 parts of water.
Wherein, the grain size of corundum aggregate is 1-3mm；The clipped machine of reinforcing fiber used is chopped, and the fiber after being chopped is long
Degree is 3-5mm.
Contain magnesia, yttrium oxide and lanthanum chloride in sintering aid, the mass ratio of three is 8:1:1.
The preparation method of refractory brick provided in this embodiment is：Prepare each raw material component according to mass fraction, by aluminium oxide
Micro mist, silicon carbide micro-powder, mullite powder, aquamaine mountain flour, nano zircite and sintering aid are added to ball milling mixing in ball mill
Uniformly, then mixture is added to together with corundum aggregate, reinforcing fiber, polymerization Silica hydrogel and water in batch mixer and is stirred
It is even, slurry is obtained, slurry is injected into compression moulding in mold, then adobe is sent to high temperature kiln by drying at room temperature 10h after demoulding
Middle roasting, moisture content when fire resisting brick adobe is sent to high temperature roasting in kilns are not higher than 8%；When roasting, first with 8 DEG C/min's
Furnace temperature is risen to 900 DEG C by heating rate, then furnace temperature is increased to 1550 DEG C by heat preservation roasting 1.5h with 10 DEG C of heating rate,
Continue high-temperature roasting 1.5h, then furnace temperature is down to 1200 DEG C with the rate of 15 DEG C/min, heat preservation roasting 6h finally reduces furnace temperature
To room temperature, brick body is come out of the stove cooling.
Embodiment 3
A kind of reinforcing refractory brick of pressure resistance anticracking, according to mass fraction, the raw material components of refractory brick include：23 parts of corundum aggregate,
55 parts of alumina powder, 7 parts of silicon carbide micro-powder, 15 parts of mullite powder, 14 parts of aquamaine mountain flour, 3.5 parts of nano zircite are strengthened fine
11 parts of dimension polymerize 12 parts of Silica hydrogel, 0.4 part of sintering aid, 27 parts of water.
Wherein, the grain size of corundum aggregate is 1-3mm；The clipped machine of reinforcing fiber used is chopped, and the fiber after being chopped is long
Degree is 3-5mm.
Contain magnesia, yttrium oxide and lanthanum chloride in sintering aid, the mass ratio of three is 8:1:1.
The preparation method of refractory brick provided in this embodiment is：Prepare each raw material component according to mass fraction, by aluminium oxide
Micro mist, silicon carbide micro-powder, mullite powder, aquamaine mountain flour, nano zircite and sintering aid are added to ball milling mixing in ball mill
Uniformly, then mixture is added to together with corundum aggregate, reinforcing fiber, polymerization Silica hydrogel and water in batch mixer and is stirred
It is even, slurry is obtained, slurry is injected into compression moulding in mold, then adobe is sent to high temperature kiln by drying at room temperature 8h after demoulding
Middle roasting, moisture content when fire resisting brick adobe is sent to high temperature roasting in kilns are not higher than 8%；When roasting, first with 6 DEG C/min's
Furnace temperature is risen to 870 DEG C by heating rate, then furnace temperature is increased to 1530 DEG C by heat preservation roasting 1.2h with 8 DEG C of heating rate, after
Continuous high-temperature roasting 1h, then furnace temperature is down to 1170 DEG C with the rate of 14 DEG C/min, furnace temperature is finally reduced to room by heat preservation roasting 5h
Temperature comes out of the stove brick body cooling.
Performance test
The refractory brick of the present embodiment is tested for the property, the project of test includes that refractoriness, cold crushing strength and high temperature are resistance to
Buckling performance, obtains following experimental result, and in test experiments, the common high-alumina brick of same specification bought in the market is arranged as a contrast
Group carries out performance comparison：
Table 1：The performance comparison test result of embodiment and high-alumina brick
It analyzes the above experimental result to find, refractory brick provided by the invention has higher fire resisting compared with conventional high-alumina brick
Temperature and compressive resistance, brick body bend-resistance performance are very outstanding, it is not easy to crack, the durability degree of the type refractory brick is more preferable, uses
Longer life expectancy.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, although with reference to aforementioned reality
Applying example, invention is explained in detail, for those skilled in the art, still can be to aforementioned each implementation
Technical solution recorded in example is modified or equivalent replacement of some of the technical features.All essences in the present invention
With within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention god.
Claims (10)
1. a kind of reinforcing refractory brick of pressure resistance anticracking, it is characterised in that：According to mass fraction, the raw material components packet of the refractory brick
It includes：20-25 parts of corundum aggregate, 50-60 parts of alumina powder, 5-9 parts of silicon carbide micro-powder, 13-15 parts of mullite powder, aquamaine mountain flour
12-16 parts, 2-5 parts of nano zircite, 10-13 parts of reinforcing fiber polymerize 9-14 parts of Silica hydrogel, 0.2-0.5 parts of sintering aid, water
25-30 parts.
2. a kind of reinforcing refractory brick of pressure-resistant anticracking according to claim 1, it is characterised in that：According to mass fraction, institute
The raw material components for stating refractory brick include：22-24 parts of corundum aggregate, 54-57 parts of alumina powder, 6-8 parts of silicon carbide micro-powder, Mo Lai
14-15 parts of mountain flour, 13-15 parts of aquamaine mountain flour, 3-4 parts of nano zircite, 11-12 parts of reinforcing fiber, polymerization Silica hydrogel 10-13
Part, 0.3-0.4 parts of sintering aid, 26-28 parts of water.
3. a kind of reinforcing refractory brick of pressure-resistant anticracking according to claim 2, it is characterised in that：According to mass fraction, institute
The raw material components for stating refractory brick include：23 parts of corundum aggregate, 55 parts of alumina powder, 7 parts of silicon carbide micro-powder, mullite powder 15
Part, 14 parts of aquamaine mountain flour, 3.5 parts of nano zircite, 11 parts of reinforcing fiber, 12 parts of Silica hydrogel of polymerization, 0.4 part of sintering aid, water
27 parts.
4. a kind of reinforcing refractory brick of pressure-resistant anticracking according to claim 1, it is characterised in that：The system of the reinforcing fiber
Preparation Method includes the following steps：
（1）According to mass percent, prepare ceramic raw material：Calcium hydroxide 6.5-8.6%, colloidal silicon dioxide 20.5-22.3%, two
Titanium oxide 1.5-2.3%, magnesium sulfate 4.5-6.3%, yttrium carbonate 0.02-0.04%, sodium carbonate 9.4-11.7%, surplus are aluminum nitrate；
Ceramic raw material is added to ball milling mixing in ball mill, obtains required fibrous matter source；
（2）According to mass percent, by the fibrous matter source of 15.3wt%, the polyvinyl alcohol of 9.7wt%, the polycyclic oxygen third of 3.6wt%
Alkane, the lauric monoethanolamide of 0.8wt%, the glycine betaine of 2.8wt%；It is add to deionized water decentralized processing, then to group
It closes and acetic acid is added dropwise in liquid, the pH value for adjusting combination liquid is 3.8-4.5, obtains required fibrous matter liquid；
（3）Fibrous matter liquid is added in the liquid storage container of electrospinning device, spinning spout of the fibrous matter liquid from equipment
It projects, is acted on by the high voltage power supply of 15.5-18.0kV, fibrous matter liquid directive collector, the volatile matter in fibrous matter liquid
After volatilization, collection obtains spinning fibre, and spinning fibre is sent in high temperature furnace, is burnt into 1050-1200 DEG C of high-temperature
2.5-3h obtains required ceramic fibre；A diameter of 120-150nm of ceramic fibre；
（4）It is dry after ceramic fibre is washed with deionized, it is then fed into acidizing corrosion process chamber, acidizing corrosion processing
Interior is full hydrogen chloride steam, and steam pressure 0.8-1.0MPa, the indoor temperature of acidizing corrosion processing is 150-160 DEG C,
Acidizing corrosion processing time is 4-7s, and after treatment takes out the fiber after acidizing corrosion, and 3-5 is rinsed repeatedly with deionized water
It is secondary, until cleaning solution is in neutrality；
（5）According to mass percent, by the superfine silicon carbide whisker of 13wt%, the polyvinyl butyral of 0.8wt%, 0.6wt%'s
The triethyl phosphate of propionic acid alcohol and 2wt% are added in isopropanol solvent, and ultrasonic wave decentralized processing obtains whisker maceration extract, will be upper
The ceramic fibre of step is immersed in whisker maceration extract and handles 10-15min, then takes out ceramic fibre, is sent to high temperature furnace
In, 30-40min is burnt into 480-560 DEG C of temperature, product cooled to room temperature will be burnt into, obtain required reinforcing fiber.
5. a kind of reinforcing refractory brick of pressure-resistant anticracking according to claim 4, it is characterised in that：The step（3）And step
Suddenly（5）In high temperature furnace sintering process in be all made of nitrogen atmosphere and protected.
6. a kind of reinforcing refractory brick of pressure-resistant anticracking according to claim 4, it is characterised in that：The step（5）In surpass
The grain size of thin silicon carbide whisker is 50-55nm.
7. a kind of reinforcing refractory brick of pressure-resistant anticracking according to claim 1, it is characterised in that：The grain of the corundum aggregate
Diameter is 1-3mm；The clipped machine of reinforcing fiber used is chopped, and the fibre length after being chopped is 3-5mm.
8. a kind of reinforcing refractory brick of pressure-resistant anticracking according to claim 1, it is characterised in that：Contain in the sintering aid
The mass ratio of magnesia, yttrium oxide and lanthanum chloride, three is 8:1:1.
9. a kind of reinforcing refractory brick of pressure-resistant anticracking according to claim 1, it is characterised in that：The system of the refractory brick
Preparation Method is：Prepare each raw material component according to mass fraction, by alumina powder, silicon carbide micro-powder, mullite powder, kyanite
It is uniform that powder, nano zircite and sintering aid are added to ball milling mixing in ball mill, then by mixture and corundum aggregate, strengthen
Fiber, polymerization Silica hydrogel and water are added in batch mixer stir evenly together, obtain slurry, slurry is injected into mold and is pressed into
Then adobe is sent to high temperature roasting in kilns by type, drying at room temperature 6-10h after demoulding, when roasting, first with 5-8 DEG C/min's
Furnace temperature is risen to 850-900 DEG C by heating rate, then furnace temperature is increased to by heat preservation roasting 1-1.5h with 7-10 DEG C of heating rate
1500-1550 DEG C, continue high-temperature roasting 0.5-1.5h, then furnace temperature is down to 1150-1200 DEG C with the rate of 12-15 DEG C/min,
Heat preservation roasting 3-6h, is finally reduced to room temperature by furnace temperature, brick body is come out of the stove cooling.
10. a kind of reinforcing refractory brick of pressure-resistant anticracking according to claim 9, it is characterised in that：The fire resisting brick adobe
Moisture content when being sent to high temperature roasting in kilns is not higher than 8%.
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Application publication date: 20180928 |