CN108892519A - A kind of refractory material and preparation method thereof - Google Patents

A kind of refractory material and preparation method thereof Download PDF

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Publication number
CN108892519A
CN108892519A CN201810856474.4A CN201810856474A CN108892519A CN 108892519 A CN108892519 A CN 108892519A CN 201810856474 A CN201810856474 A CN 201810856474A CN 108892519 A CN108892519 A CN 108892519A
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parts
refractory material
modified
attapulgite
mullite
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王虎
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Hefei Ming Yu High Temperature Technology Co Ltd
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Hefei Ming Yu High Temperature Technology Co Ltd
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Abstract

The invention discloses a kind of refractory material, the raw material including following parts by weight：30~40 parts of mullite, 20~35 parts of chromium oxide, α-Al2O320~40 parts of micro mist, 1~3 part of barium monoxide, 12~18 parts of kaolin, 13~16 parts attapulgite modified, 4~7 parts of graphite, 2~5 parts of magnesia, 4~9 parts of nano-titanium dioxide, 6~10 parts of floating bead, 3~8 parts of ceramic sand, modified 7~11 parts of tree ash, 3~7 parts of bonding agent.Refractory material of the present invention has many advantages, such as that refractoriness is high, adhesion strength is high, Linear change rate is low, volume stability, resistant to corrosion and workability are good.

Description

A kind of refractory material and preparation method thereof
Technical field
The invention belongs to technical field of refractory materials, and in particular to a kind of refractory material and preparation method thereof.
Background technique
Kiln is the equipment to burnt product being built into refractory material, is the indispensable facility in pottery art molding.Kiln Inner wall is generally using heat preservation, heat-insulated, high-temperature flame-proof material.With Ceramic Market need constantly increase, it is desirable that quality also get over Come higher, this just needs to be needed in fired ceramic than traditional higher firing temperature, and then to the high temperature of kiln inner wall Refractory material is proposed with high requirement, as the technique of some products requires the refractory material that uses to want capable of bearing 1700 DEG C or more High temperature.The high temeperature chemistry erosion-resisting characteristics of kiln inner wall refractory material directly affects the service life of refractory material and the work of kiln Service life.Refractory material and castable refractory currently on the market is generally no more than 1600-1700 DEG C, and otherwise castable refractory is It can damage.In this case, common refractory is just unable to satisfy requirement, cannot use, and urgent need develops a kind of 1700 DEG C of ability The refractory material of the above high temperature.
The patent of invention of Authorization Notice No. CN102491761B discloses a kind of hollow alumina ball thermal insulation refractory material Preparation method.Its technical solution is：Organic bond is added in alumina hollow ball to add water and stir after evenly mixing, makes organic After bonding agent sufficiently soaks and adheres to alumina hollow ball surface；The mixed powder of clay and α-Al2O3 micro mist is added, mixing is equal It is even；The molded article of preparation is burnt into after 100-110 DEG C dry in 1550-1650 DEG C of heat preservation.The mechanical property of the refractory material It can be poor.
Summary of the invention
The present invention provides a kind of refractory materials and preparation method thereof, solve the problems in background technique, institute of the present invention The refractory material stated has low high refractoriness, adhesion strength height, Linear change rate, volume stability, resistant to corrosion and workability good The advantages that.
It is of the existing technology in order to solve the problems, such as, it adopts the following technical scheme that：
A kind of refractory material, the raw material including following parts by weight：30~40 parts of mullite, 20~35 parts of chromium oxide, α-Al2O3It is micro- 20~40 parts of powder, 1~3 part of barium monoxide, 12~18 parts of kaolin, 13~16 parts attapulgite modified, 4~7 parts of graphite, magnesia 2~5 parts, 4~9 parts of nano-titanium dioxide, 6~10 parts of floating bead, 3~8 parts of ceramic sand, modified 7~11 parts of tree ash, bonding agent 3~7 parts.
Preferably, the refractory material, the raw material including following parts by weight：32~38 parts of mullite, chromium oxide 25~30 Part, α-Al2O325~35 parts of micro mist, 1.4~2.3 parts of barium monoxide, 14~16 parts of kaolin, 14~15 parts attapulgite modified, stone 5~6 parts of ink, 3~4 parts of magnesia, 5~8 parts of nano-titanium dioxide, 7~9 parts of floating bead, 4~7 parts of ceramic sand, modified tree ash 8~10 parts, 4~6 parts of bonding agent.
Preferably, the refractory material, the raw material including following parts by weight：35 parts of mullite, 28 parts of chromium oxide, α-Al2O3 30 parts of micro mist, 1.9 parts of barium monoxide, 15 parts of kaolin, 14.8 parts attapulgite modified, 5.7 parts of graphite, magnesia 3.3 part, nanometer 6 parts of titanium dioxide, 8 parts of floating bead, 5 parts of ceramic sand, modified 9 parts of tree ash, 5 parts of bonding agent.
Preferably, the attapulgite modified preparation method is as follows：
（1）It takes natural attapulgite to carry out being crushed to 200~300 mesh, 17 times of attapulgite quality of water is added, stirring forms outstanding Mud scum slurry, takes upper suspension centrifugal treating 15min in the centrifuge of 5000r/min, is filtered by vacuum；
（2）By step（1）Resulting filter cake is put into the nano silicon dioxide sol prepared in advance, is adsorbed using vacuum impregnation Technique makes to form gel in nano silicon dioxide sol sucking attapulgite cavity, after to be aging, dry by normal pressure classification, Hydrophobic processing forms attapulgite modified.
Preferably, the partial size of the mullite is 0.8~1.5mm, and the partial size of the floating bead is 0.1~0.2mm, the pottery The partial size of porcelain sand is 0.2~0.8mm, and the partial size of the zirconium oxide is 0.1~0.5mm.
Preferably, the preparation method of the modified tree ash is as follows：
The salt acid soak tree ash 6h for being first 10% with mass fraction concentration, deionized water washes clean, then it is dense with mass fraction Degree impregnates 6h for 10% sodium hydroxide solution, then is washed with deionized to neutrality, drying, and addition is equivalent to tree ash weight 3% sodium lignin sulfonate, 1% methyltriethoxysilane, 2.6% epoxidation triglyceride, 4% ceramic powder are measured, it is high Fast 2000r/min stirs 30min, and dries pulverizing is ground into superfines.
Preferably, the α-Al2O3The granularity of micro mist is in 320 mesh hereinafter, Al2O3Content >=99%.
Preferably, the bonding agent is liquid thermoplastic phenolic resin.
A method of the refractory material is prepared, is included the following steps：
（1）Mullite, chromium oxide, α-Al are weighed by above-mentioned formula2O3Micro mist, barium monoxide, kaolin, attapulgite modified, stone Ink, magnesia, nano-titanium dioxide, floating bead, ceramic sand, modified tree ash, bonding agent, it is spare；
（2）By chromium oxide, α-Al2O3Micro mist, barium monoxide, kaolin, attapulgite modified, graphite, magnesia, nanometer titanium dioxide Titanium and modified tree ash are first placed in premixing machine and mix, and are subsequently placed in dispersion machine high speed and disperse 30~60 minutes, must mix Powder；
（3）Mullite, floating bead, ceramic sand are added to step（2）In resulting mixed-powder, mechanical stirring is uniform, adds Then bonding agent is added until water content is 50%~60% in material in water, be heated to 100 DEG C, is kneaded 1~2 hour, obtains mixing slurry Material；
（4）By step（3）Resulting mixed slurry is press-formed, and first drying 7~12 is small in 200~300 DEG C of environment When, it is subsequently placed in nitrogen environment and carries out firing cooling to get the refractory material.
Preferably, the step（4）The process of middle firing is as follows：
280 DEG C first are warming up to the heating rate of 3 DEG C/min, keeps the temperature 2 hours, then be warming up to 900 with the heating rate of 4 DEG C/min DEG C, 2 hours are kept the temperature, is then warming up to 1500 DEG C with the heating rate of 10 DEG C/min, keeps the temperature 15 hours.
Compared with prior art, the present invention it has the advantages that：
（1）Refractory material of the present invention uses mullite, chromium oxide, α-Al2O3Micro mist, barium monoxide, kaolin, modification are recessed Convex stick soil, graphite, magnesia, nano-titanium dioxide, floating bead, ceramic sand, modified tree ash, bonding agent etc. are used as raw material, former It mutually acts synergistically between material, the product prepared has that refractoriness is high, adhesion strength is high, Linear change rate is low, volume stability, resistance to Corrode and workability it is good the advantages that, refractoriness can satisfy the market demand up to 1700 DEG C or more completely；
（2）The preparation method technical maturity of refractory material of the present invention, production cost is low, application easy to spread, has preferable Economic and social benefit；
（3）Aluminum oxide content in refractory material of the present invention improves, and increases zircon ceramic sand and graphite, so that making It is improved with the anticorrosion antiwear performance of the kiln inner wall of refractory material of the present invention, protects furnace body, extend furnace body service life.
Specific embodiment
Present invention will be further explained below with reference to specific examples.These embodiments are merely to illustrate the present invention and do not have to In limiting the scope of the invention.
Embodiment 1
The present embodiment is related to a kind of refractory material, the raw material including following parts by weight：30 parts of mullite, 20 parts of chromium oxide, α- Al2O320 parts of micro mist, 1 part of barium monoxide, 12 parts of kaolin, 13 parts attapulgite modified, 4 parts of graphite, 2 parts of magnesia, nano-silica Change 4 parts of titanium, 6 parts of floating bead, 3 parts of ceramic sand, modified 7 parts of tree ash, 3 parts of bonding agent.
Wherein, the attapulgite modified preparation method is as follows：
（1）It takes natural attapulgite to carry out being crushed to 200~300 mesh, 17 times of attapulgite quality of water is added, stirring forms outstanding Mud scum slurry, takes upper suspension centrifugal treating 15min in the centrifuge of 5000r/min, is filtered by vacuum；
（2）By step（1）Resulting filter cake is put into the nano silicon dioxide sol prepared in advance, is adsorbed using vacuum impregnation Technique makes to form gel in nano silicon dioxide sol sucking attapulgite cavity, after to be aging, dry by normal pressure classification, Hydrophobic processing forms attapulgite modified.
Wherein, the partial size of the mullite is 0.8~1.5mm, and the partial size of the floating bead is 0.1~0.2mm, the ceramics The partial size of sand is 0.2~0.8mm, and the partial size of the zirconium oxide is 0.1~0.5mm.
Wherein, the preparation method of the modified tree ash is as follows：
The salt acid soak tree ash 6h for being first 10% with mass fraction concentration, deionized water washes clean, then it is dense with mass fraction Degree impregnates 6h for 10% sodium hydroxide solution, then is washed with deionized to neutrality, drying, and addition is equivalent to tree ash weight 3% sodium lignin sulfonate, 1% methyltriethoxysilane, 2.6% epoxidation triglyceride, 4% ceramic powder are measured, it is high Fast 2000r/min stirs 30min, and dries pulverizing is ground into superfines.
Wherein, the α-Al2O3The granularity of micro mist is in 320 mesh hereinafter, Al2O3Content >=99%.
Wherein, the bonding agent is liquid thermoplastic phenolic resin.
A method of the refractory material is prepared, is included the following steps：
（1）Mullite, chromium oxide, α-Al are weighed by above-mentioned formula2O3Micro mist, barium monoxide, kaolin, attapulgite modified, stone Ink, magnesia, nano-titanium dioxide, floating bead, ceramic sand, modified tree ash, bonding agent, it is spare；
（2）By chromium oxide, α-Al2O3Micro mist, barium monoxide, kaolin, attapulgite modified, graphite, magnesia, nanometer titanium dioxide Titanium and modified tree ash are first placed in premixing machine and mix, and are subsequently placed in dispersion machine high speed and disperse 30 minutes, obtain mixed-powder；
（3）Mullite, floating bead, ceramic sand are added to step（2）In resulting mixed-powder, mechanical stirring is uniform, adds Then bonding agent is added until water content is 50% in material in water, be heated to 100 DEG C, is kneaded 1 hour, obtains mixed slurry；
（4）By step（3）Resulting mixed slurry is press-formed, first 7 hours dry in 200 DEG C of environment, is then set It is cooling to get the refractory material that firing is carried out in nitrogen environment.
Wherein, the step（4）The process of middle firing is as follows：
280 DEG C first are warming up to the heating rate of 3 DEG C/min, keeps the temperature 2 hours, then be warming up to 900 with the heating rate of 4 DEG C/min DEG C, 2 hours are kept the temperature, is then warming up to 1500 DEG C with the heating rate of 10 DEG C/min, keeps the temperature 15 hours.
Embodiment 2
The present embodiment is related to a kind of refractory material, the raw material including following parts by weight：40 parts of mullite, 35 parts of chromium oxide, α- Al2O340 parts of micro mist, 3 parts of barium monoxide, 18 parts of kaolin, 16 parts attapulgite modified, 7 parts of graphite, 5 parts of magnesia, nano-silica Change 9 parts of titanium, 10 parts of floating bead, 8 parts of ceramic sand, modified 11 parts of tree ash, 7 parts of bonding agent.
Wherein, the attapulgite modified preparation method is as follows：
（1）It takes natural attapulgite to carry out being crushed to 200~300 mesh, 17 times of attapulgite quality of water is added, stirring forms outstanding Mud scum slurry, takes upper suspension centrifugal treating 15min in the centrifuge of 5000r/min, is filtered by vacuum；
（2）By step（1）Resulting filter cake is put into the nano silicon dioxide sol prepared in advance, is adsorbed using vacuum impregnation Technique makes to form gel in nano silicon dioxide sol sucking attapulgite cavity, after to be aging, dry by normal pressure classification, Hydrophobic processing forms attapulgite modified.
Wherein, the partial size of the mullite is 0.8~1.5mm, and the partial size of the floating bead is 0.1~0.2mm, the ceramics The partial size of sand is 0.2~0.8mm, and the partial size of the zirconium oxide is 0.1~0.5mm.
Wherein, the preparation method of the modified tree ash is as follows：
The salt acid soak tree ash 6h for being first 10% with mass fraction concentration, deionized water washes clean, then it is dense with mass fraction Degree impregnates 6h for 10% sodium hydroxide solution, then is washed with deionized to neutrality, drying, and addition is equivalent to tree ash weight 3% sodium lignin sulfonate, 1% methyltriethoxysilane, 2.6% epoxidation triglyceride, 4% ceramic powder are measured, it is high Fast 2000r/min stirs 30min, and dries pulverizing is ground into superfines.
Wherein, the α-Al2O3The granularity of micro mist is in 320 mesh hereinafter, Al2O3Content >=99%.
Wherein, the bonding agent is liquid thermoplastic phenolic resin.
A method of the refractory material is prepared, is included the following steps：
（1）Mullite, chromium oxide, α-Al are weighed by above-mentioned formula2O3Micro mist, barium monoxide, kaolin, attapulgite modified, stone Ink, magnesia, nano-titanium dioxide, floating bead, ceramic sand, modified tree ash, bonding agent, it is spare；
（2）By chromium oxide, α-Al2O3Micro mist, barium monoxide, kaolin, attapulgite modified, graphite, magnesia, nanometer titanium dioxide Titanium and modified tree ash are first placed in premixing machine and mix, and are subsequently placed in dispersion machine high speed and disperse 60 minutes, obtain mixed-powder；
（3）Mullite, floating bead, ceramic sand are added to step（2）In resulting mixed-powder, mechanical stirring is uniform, adds Then bonding agent is added until water content is 60% in material in water, be heated to 100 DEG C, is kneaded 2 hours, obtains mixed slurry；
（4）By step（3）Resulting mixed slurry is press-formed, first 12 hours dry in 300 DEG C of environment, is then set It is cooling to get the refractory material that firing is carried out in nitrogen environment.
Wherein, the step（4）The process of middle firing is as follows：
280 DEG C first are warming up to the heating rate of 3 DEG C/min, keeps the temperature 2 hours, then be warming up to 900 with the heating rate of 4 DEG C/min DEG C, 2 hours are kept the temperature, is then warming up to 1500 DEG C with the heating rate of 10 DEG C/min, keeps the temperature 15 hours.
Embodiment 3
The present embodiment is related to a kind of refractory material, the raw material including following parts by weight：32 parts of mullite, 25 parts of chromium oxide, α- Al2O325 parts of micro mist, 1.4 parts of barium monoxide, 14 parts of kaolin, 14 parts attapulgite modified, 5 parts of graphite, 3 part, nanometer two of magnesia 5 parts of titanium oxide, 7 parts of floating bead, 4 parts of ceramic sand, modified 8 parts of tree ash, 4 parts of bonding agent.
Wherein, the attapulgite modified preparation method is as follows：
（1）It takes natural attapulgite to carry out being crushed to 200~300 mesh, 17 times of attapulgite quality of water is added, stirring forms outstanding Mud scum slurry, takes upper suspension centrifugal treating 15min in the centrifuge of 5000r/min, is filtered by vacuum；
（2）By step（1）Resulting filter cake is put into the nano silicon dioxide sol prepared in advance, is adsorbed using vacuum impregnation Technique makes to form gel in nano silicon dioxide sol sucking attapulgite cavity, after to be aging, dry by normal pressure classification, Hydrophobic processing forms attapulgite modified.
Wherein, the partial size of the mullite is 0.8~1.5mm, and the partial size of the floating bead is 0.1~0.2mm, the ceramics The partial size of sand is 0.2~0.8mm, and the partial size of the zirconium oxide is 0.1~0.5mm.
Wherein, the preparation method of the modified tree ash is as follows：
The salt acid soak tree ash 6h for being first 10% with mass fraction concentration, deionized water washes clean, then it is dense with mass fraction Degree impregnates 6h for 10% sodium hydroxide solution, then is washed with deionized to neutrality, drying, and addition is equivalent to tree ash weight 3% sodium lignin sulfonate, 1% methyltriethoxysilane, 2.6% epoxidation triglyceride, 4% ceramic powder are measured, it is high Fast 2000r/min stirs 30min, and dries pulverizing is ground into superfines.
Wherein, the α-Al2O3The granularity of micro mist is in 320 mesh hereinafter, Al2O3Content >=99%.
Wherein, the bonding agent is liquid thermoplastic phenolic resin.
A method of the refractory material is prepared, is included the following steps：
（1）Mullite, chromium oxide, α-Al are weighed by above-mentioned formula2O3Micro mist, barium monoxide, kaolin, attapulgite modified, stone Ink, magnesia, nano-titanium dioxide, floating bead, ceramic sand, modified tree ash, bonding agent, it is spare；
（2）By chromium oxide, α-Al2O3Micro mist, barium monoxide, kaolin, attapulgite modified, graphite, magnesia, nanometer titanium dioxide Titanium and modified tree ash are first placed in premixing machine and mix, and are subsequently placed in dispersion machine high speed and disperse 40 minutes, obtain mixed-powder；
（3）Mullite, floating bead, ceramic sand are added to step（2）In resulting mixed-powder, mechanical stirring is uniform, adds Then bonding agent is added until water content is 52% in material in water, be heated to 100 DEG C, is kneaded 1.2 hours, obtains mixed slurry；
（4）By step（3）Resulting mixed slurry is press-formed, first 8 hours dry in 230 DEG C of environment, is then set It is cooling to get the refractory material that firing is carried out in nitrogen environment.
Wherein, the step（4）The process of middle firing is as follows：
280 DEG C first are warming up to the heating rate of 3 DEG C/min, keeps the temperature 2 hours, then be warming up to 900 with the heating rate of 4 DEG C/min DEG C, 2 hours are kept the temperature, is then warming up to 1500 DEG C with the heating rate of 10 DEG C/min, keeps the temperature 15 hours.
Embodiment 4
The present embodiment is related to a kind of refractory material, the raw material including following parts by weight：38 parts of mullite, 30 parts of chromium oxide, α- Al2O335 parts of micro mist, 2.3 parts of barium monoxide, 16 parts of kaolin, 15 parts attapulgite modified, 6 parts of graphite, 4 part, nanometer two of magnesia 8 parts of titanium oxide, 9 parts of floating bead, 7 parts of ceramic sand, modified 10 parts of tree ash, 6 parts of bonding agent.
Wherein, the attapulgite modified preparation method is as follows：
（1）It takes natural attapulgite to carry out being crushed to 200~300 mesh, 17 times of attapulgite quality of water is added, stirring forms outstanding Mud scum slurry, takes upper suspension centrifugal treating 15min in the centrifuge of 5000r/min, is filtered by vacuum；
（2）By step（1）Resulting filter cake is put into the nano silicon dioxide sol prepared in advance, is adsorbed using vacuum impregnation Technique makes to form gel in nano silicon dioxide sol sucking attapulgite cavity, after to be aging, dry by normal pressure classification, Hydrophobic processing forms attapulgite modified.
Wherein, the partial size of the mullite is 0.8~1.5mm, and the partial size of the floating bead is 0.1~0.2mm, the ceramics The partial size of sand is 0.2~0.8mm, and the partial size of the zirconium oxide is 0.1~0.5mm.
Wherein, the preparation method of the modified tree ash is as follows：
The salt acid soak tree ash 6h for being first 10% with mass fraction concentration, deionized water washes clean, then it is dense with mass fraction Degree impregnates 6h for 10% sodium hydroxide solution, then is washed with deionized to neutrality, drying, and addition is equivalent to tree ash weight 3% sodium lignin sulfonate, 1% methyltriethoxysilane, 2.6% epoxidation triglyceride, 4% ceramic powder are measured, it is high Fast 2000r/min stirs 30min, and dries pulverizing is ground into superfines.
Wherein, the α-Al2O3The granularity of micro mist is in 320 mesh hereinafter, Al2O3Content >=99%.
Wherein, the bonding agent is liquid thermoplastic phenolic resin.
A method of the refractory material is prepared, is included the following steps：
（1）Mullite, chromium oxide, α-Al are weighed by above-mentioned formula2O3Micro mist, barium monoxide, kaolin, attapulgite modified, stone Ink, magnesia, nano-titanium dioxide, floating bead, ceramic sand, modified tree ash, bonding agent, it is spare；
（2）By chromium oxide, α-Al2O3Micro mist, barium monoxide, kaolin, attapulgite modified, graphite, magnesia, nanometer titanium dioxide Titanium and modified tree ash are first placed in premixing machine and mix, and are subsequently placed in dispersion machine high speed and disperse 45 minutes, obtain mixed-powder；
（3）Mullite, floating bead, ceramic sand are added to step（2）In resulting mixed-powder, mechanical stirring is uniform, adds Then bonding agent is added until water content is 55% in material in water, be heated to 100 DEG C, is kneaded 1.5 hours, obtains mixed slurry；
（4）By step（3）Resulting mixed slurry is press-formed, first 9 hours dry in 250 DEG C of environment, is then set It is cooling to get the refractory material that firing is carried out in nitrogen environment.
Wherein, the step（4）The process of middle firing is as follows：
280 DEG C first are warming up to the heating rate of 3 DEG C/min, keeps the temperature 2 hours, then be warming up to 900 with the heating rate of 4 DEG C/min DEG C, 2 hours are kept the temperature, is then warming up to 1500 DEG C with the heating rate of 10 DEG C/min, keeps the temperature 15 hours.
Embodiment 5
The present embodiment is related to a kind of refractory material, the raw material including following parts by weight：35 parts of mullite, 28 parts of chromium oxide, α- Al2O330 parts of micro mist, 1.9 parts of barium monoxide, 15 parts of kaolin, 14.8 parts attapulgite modified, 5.7 parts of graphite, 3.3 parts of magnesia, 6 parts of nano-titanium dioxide, 8 parts of floating bead, 5 parts of ceramic sand, modified 9 parts of tree ash, 5 parts of bonding agent.
Wherein, the attapulgite modified preparation method is as follows：
（1）It takes natural attapulgite to carry out being crushed to 200~300 mesh, 17 times of attapulgite quality of water is added, stirring forms outstanding Mud scum slurry, takes upper suspension centrifugal treating 15min in the centrifuge of 5000r/min, is filtered by vacuum；
（2）By step（1）Resulting filter cake is put into the nano silicon dioxide sol prepared in advance, is adsorbed using vacuum impregnation Technique makes to form gel in nano silicon dioxide sol sucking attapulgite cavity, after to be aging, dry by normal pressure classification, Hydrophobic processing forms attapulgite modified.
Wherein, the partial size of the mullite is 0.8~1.5mm, and the partial size of the floating bead is 0.1~0.2mm, the ceramics The partial size of sand is 0.2~0.8mm, and the partial size of the zirconium oxide is 0.1~0.5mm.
Wherein, the preparation method of the modified tree ash is as follows：
The salt acid soak tree ash 6h for being first 10% with mass fraction concentration, deionized water washes clean, then it is dense with mass fraction Degree impregnates 6h for 10% sodium hydroxide solution, then is washed with deionized to neutrality, drying, and addition is equivalent to tree ash weight 3% sodium lignin sulfonate, 1% methyltriethoxysilane, 2.6% epoxidation triglyceride, 4% ceramic powder are measured, it is high Fast 2000r/min stirs 30min, and dries pulverizing is ground into superfines.
Wherein, the α-Al2O3The granularity of micro mist is in 320 mesh hereinafter, Al2O3Content >=99%.
Wherein, the bonding agent is liquid thermoplastic phenolic resin.
A method of the refractory material is prepared, is included the following steps：
（1）Mullite, chromium oxide, α-Al are weighed by above-mentioned formula2O3Micro mist, barium monoxide, kaolin, attapulgite modified, stone Ink, magnesia, nano-titanium dioxide, floating bead, ceramic sand, modified tree ash, bonding agent, it is spare；
（2）By chromium oxide, α-Al2O3Micro mist, barium monoxide, kaolin, attapulgite modified, graphite, magnesia, nanometer titanium dioxide Titanium and modified tree ash are first placed in premixing machine and mix, and are subsequently placed in dispersion machine high speed and disperse 55 minutes, obtain mixed-powder；
（3）Mullite, floating bead, ceramic sand are added to step（2）In resulting mixed-powder, mechanical stirring is uniform, adds Then bonding agent is added until water content is 50%~60% in material in water, be heated to 100 DEG C, is kneaded 1.8 hours, obtains mixing slurry Material；
（4）By step（3）Resulting mixed slurry is press-formed, first 11 hours dry in 200~300 DEG C of environment, It is subsequently placed in nitrogen environment and carries out firing cooling to get the refractory material.
Wherein, the step（4）The process of middle firing is as follows：
280 DEG C first are warming up to the heating rate of 3 DEG C/min, keeps the temperature 2 hours, then be warming up to 900 with the heating rate of 4 DEG C/min DEG C, 2 hours are kept the temperature, is then warming up to 1500 DEG C with the heating rate of 10 DEG C/min, keeps the temperature 15 hours.
Comparative example
A kind of preparation of hollow alumina ball thermal insulation refractory material of the patent of invention bulletin of Authorization Notice No. CN102491761B Method.
The performance of the refractory material described in Examples 1 to 5, comparative example is tested respectively, test result is as follows table：
From above table as can be seen that capabilities of refractory materials of the present invention is better than comparative example.
In conclusion（1）Refractory material of the present invention uses mullite, chromium oxide, α-Al2O3Micro mist, barium monoxide, Kaolin, attapulgite modified, graphite, magnesia, nano-titanium dioxide, floating bead, ceramic sand, modified tree ash, bonding agent It Deng being used as raw material, mutually acts synergistically between raw material, the product prepared has that refractoriness is high, adhesion strength is high, Linear change rate The advantages that low, volume stability, good resistant to corrosion and workability, refractoriness can satisfy market up to 1700 DEG C or more completely Demand；
（2）The preparation method technical maturity of refractory material of the present invention, production cost is low, application easy to spread, has preferable Economic and social benefit；
（3）Aluminum oxide content in refractory material of the present invention improves, and increases zircon ceramic sand and graphite, so that making It is improved with the anticorrosion antiwear performance of the kiln inner wall of refractory material of the present invention, protects furnace body, extend furnace body service life.
Specific embodiments of the present invention are described above.It is to be appreciated that the invention is not limited to above-mentioned Particular implementation, those skilled in the art can make various deformations or amendments within the scope of the claims, this not shadow Ring substantive content of the invention.

Claims (10)

1. a kind of refractory material, which is characterized in that the raw material including following parts by weight：30~40 parts of mullite, chromium oxide 20~ 35 parts, α-Al2O320~40 parts of micro mist, 1~3 part of barium monoxide, 12~18 parts of kaolin, 13~16 parts attapulgite modified, graphite 4~7 parts, 2~5 parts of magnesia, 4~9 parts of nano-titanium dioxide, 6~10 parts of floating bead, 3~8 parts of ceramic sand, modified tree ash 7 ~11 parts, 3~7 parts of bonding agent.
2. refractory material according to claim 1, which is characterized in that the raw material including following parts by weight：Mullite 32~ 38 parts, 25~30 parts of chromium oxide, α-Al2O325~35 parts of micro mist, 1.4~2.3 parts of barium monoxide, 14~16 parts of kaolin, modification are recessed 14~15 parts of convex stick soil, 5~6 parts of graphite, 3~4 parts of magnesia, 5~8 parts of nano-titanium dioxide, 7~9 parts of floating bead, ceramic sand 4 ~7 parts, modified 8~10 parts of tree ash, 4~6 parts of bonding agent.
3. refractory material according to claim 1, which is characterized in that the raw material including following parts by weight：35 parts of mullite, 28 parts of chromium oxide, α-Al2O330 parts of micro mist, 1.9 parts of barium monoxide, 15 parts of kaolin, 14.8 parts attapulgite modified, graphite 5.7 Part, 3.3 parts of magnesia, 6 parts of nano-titanium dioxide, 8 parts of floating bead, 5 parts of ceramic sand, modified 9 parts of tree ash, 5 parts of bonding agent.
4. refractory material according to claim 1, which is characterized in that the attapulgite modified preparation method is as follows：
（1）It takes natural attapulgite to carry out being crushed to 200~300 mesh, 17 times of attapulgite quality of water is added, stirring forms outstanding Mud scum slurry, takes upper suspension centrifugal treating 15min in the centrifuge of 5000r/min, is filtered by vacuum；
（2）By step（1）Resulting filter cake is put into the nano silicon dioxide sol prepared in advance, is adsorbed using vacuum impregnation Technique makes to form gel in nano silicon dioxide sol sucking attapulgite cavity, after to be aging, dry by normal pressure classification, Hydrophobic processing forms attapulgite modified.
5. refractory material according to claim 1, which is characterized in that the partial size of the mullite is 0.8~1.5mm, institute The partial size for stating floating bead is 0.1~0.2mm, and the partial size of the ceramic sand is 0.2~0.8mm, the partial size of the zirconium oxide is 0.1~ 0.5mm。
6. refractory material according to claim 1, which is characterized in that the preparation method of the modified tree ash is as follows：
The salt acid soak tree ash 6h for being first 10% with mass fraction concentration, deionized water washes clean, then it is dense with mass fraction Degree impregnates 6h for 10% sodium hydroxide solution, then is washed with deionized to neutrality, drying, and addition is equivalent to tree ash weight 3% sodium lignin sulfonate, 1% methyltriethoxysilane, 2.6% epoxidation triglyceride, 4% ceramic powder are measured, it is high Fast 2000r/min stirs 30min, and dries pulverizing is ground into superfines.
7. refractory material according to claim 1, which is characterized in that the α-Al2O3The granularity of micro mist in 320 mesh hereinafter, Al2O3Content >=99%.
8. refractory material according to claim 1, which is characterized in that the bonding agent is liquid thermoplastic phenolic resin.
9. a kind of method for preparing any one of claim 1~8 refractory material, which is characterized in that include the following steps：
（1）Mullite, chromium oxide, α-Al are weighed by above-mentioned formula2O3Micro mist, barium monoxide, kaolin, attapulgite modified, stone Ink, magnesia, nano-titanium dioxide, floating bead, ceramic sand, modified tree ash, bonding agent, it is spare；
（2）By chromium oxide, α-Al2O3Micro mist, barium monoxide, kaolin, attapulgite modified, graphite, magnesia, nanometer titanium dioxide Titanium and modified tree ash are first placed in premixing machine and mix, and are subsequently placed in dispersion machine high speed and disperse 30~60 minutes, must mix Powder；
（3）Mullite, floating bead, ceramic sand are added to step（2）In resulting mixed-powder, mechanical stirring is uniform, adds Then bonding agent is added until water content is 50%~60% in material in water, be heated to 100 DEG C, is kneaded 1~2 hour, obtains mixing slurry Material；
（4）By step（3）Resulting mixed slurry is press-formed, and first drying 7~12 is small in 200~300 DEG C of environment When, it is subsequently placed in nitrogen environment and carries out firing cooling to get the refractory material.
10. preparation method according to claim 9, which is characterized in that the step（4）The process of middle firing is as follows：
280 DEG C first are warming up to the heating rate of 3 DEG C/min, keeps the temperature 2 hours, then be warming up to 900 with the heating rate of 4 DEG C/min DEG C, 2 hours are kept the temperature, is then warming up to 1500 DEG C with the heating rate of 10 DEG C/min, keeps the temperature 15 hours.
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CN110845246A (en) * 2019-12-13 2020-02-28 库卡智动(武汉)科技有限公司 High-thermal-conductivity wear-resistant refractory material and preparation method thereof
CN112176134A (en) * 2019-07-04 2021-01-05 美匡冶金技术研究院(苏州)有限公司 Furnace protection material core wire and using method thereof
JP7383081B1 (en) 2022-06-10 2023-11-17 株式会社ヨータイ Chromia-containing castable refractories

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CN108059441A (en) * 2015-12-24 2018-05-22 泉州台商投资区尚良建筑装饰有限公司 A kind of preparation method of environmental protection brick
CN108249938A (en) * 2018-03-29 2018-07-06 合肥聪亨新型建材科技有限公司 A kind of model casting liner refractory composite and preparation method thereof

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CN103100654A (en) * 2012-12-11 2013-05-15 芜湖恒坤汽车部件有限公司 Preparation method of high-strength full mold casting coating
CN108059441A (en) * 2015-12-24 2018-05-22 泉州台商投资区尚良建筑装饰有限公司 A kind of preparation method of environmental protection brick
CN108249938A (en) * 2018-03-29 2018-07-06 合肥聪亨新型建材科技有限公司 A kind of model casting liner refractory composite and preparation method thereof

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CN112176134A (en) * 2019-07-04 2021-01-05 美匡冶金技术研究院(苏州)有限公司 Furnace protection material core wire and using method thereof
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