CN115974568A - Corrosion-resistant brick for incinerator and preparation method thereof - Google Patents
Corrosion-resistant brick for incinerator and preparation method thereof Download PDFInfo
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- CN115974568A CN115974568A CN202310056460.5A CN202310056460A CN115974568A CN 115974568 A CN115974568 A CN 115974568A CN 202310056460 A CN202310056460 A CN 202310056460A CN 115974568 A CN115974568 A CN 115974568A
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- incinerator
- powder
- resistant brick
- phenolic resin
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- 239000011449 brick Substances 0.000 title claims abstract description 97
- 238000005260 corrosion Methods 0.000 title claims abstract description 82
- 230000007797 corrosion Effects 0.000 title claims abstract description 80
- 238000002360 preparation method Methods 0.000 title claims description 28
- 239000000843 powder Substances 0.000 claims abstract description 109
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical group [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims abstract description 62
- 239000005011 phenolic resin Substances 0.000 claims abstract description 36
- 229920001568 phenolic resin Polymers 0.000 claims abstract description 36
- 238000011049 filling Methods 0.000 claims abstract description 34
- 239000000853 adhesive Substances 0.000 claims abstract description 33
- 230000001070 adhesive effect Effects 0.000 claims abstract description 33
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 24
- 235000019738 Limestone Nutrition 0.000 claims abstract description 24
- 229910001570 bauxite Inorganic materials 0.000 claims abstract description 24
- 239000006028 limestone Substances 0.000 claims abstract description 24
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 17
- 239000010431 corundum Substances 0.000 claims abstract description 17
- 229910001710 laterite Inorganic materials 0.000 claims abstract description 12
- 239000011504 laterite Substances 0.000 claims abstract description 12
- 239000011230 binding agent Substances 0.000 claims abstract description 6
- 238000004519 manufacturing process Methods 0.000 claims abstract description 6
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 28
- 239000011707 mineral Substances 0.000 claims description 28
- 239000003973 paint Substances 0.000 claims description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 24
- 239000010881 fly ash Substances 0.000 claims description 23
- 238000002156 mixing Methods 0.000 claims description 23
- 239000002689 soil Substances 0.000 claims description 14
- 239000011248 coating agent Substances 0.000 claims description 8
- 238000000576 coating method Methods 0.000 claims description 8
- 239000007767 bonding agent Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 2
- 239000002253 acid Substances 0.000 abstract description 10
- 239000003513 alkali Substances 0.000 abstract description 5
- 239000011819 refractory material Substances 0.000 abstract description 5
- 238000010304 firing Methods 0.000 abstract description 4
- 239000003610 charcoal Substances 0.000 description 29
- 239000002245 particle Substances 0.000 description 22
- 230000000052 comparative effect Effects 0.000 description 15
- 239000010902 straw Substances 0.000 description 13
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 12
- 239000011435 rock Substances 0.000 description 12
- 240000008042 Zea mays Species 0.000 description 11
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 11
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 11
- 235000005822 corn Nutrition 0.000 description 11
- 239000002994 raw material Substances 0.000 description 11
- 238000002791 soaking Methods 0.000 description 8
- 229910052782 aluminium Inorganic materials 0.000 description 7
- 238000009210 therapy by ultrasound Methods 0.000 description 7
- 238000005520 cutting process Methods 0.000 description 6
- 239000000203 mixture Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000005336 cracking Methods 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000003518 caustics Substances 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 235000017060 Arachis glabrata Nutrition 0.000 description 1
- 244000105624 Arachis hypogaea Species 0.000 description 1
- 235000010777 Arachis hypogaea Nutrition 0.000 description 1
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- 240000007049 Juglans regia Species 0.000 description 1
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- 241001465754 Metazoa Species 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000005587 carbonate group Chemical group 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000010883 coal ash Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000010791 domestic waste Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002906 medical waste Substances 0.000 description 1
- 235000020232 peanut Nutrition 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 235000020234 walnut Nutrition 0.000 description 1
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Abstract
The invention relates to the field of refractory materials, and particularly discloses a corrosion-resistant brick for an incinerator, which comprises refractory aggregate, filling fine powder and a binder; wherein the refractory aggregate comprises bauxite, corundum and limestone; the filling fine powder comprises graphite powder and laterite powder; the adhesive is phenolic resin. The incinerator prepared by the invention has the advantages of high corrosion resistance and compressive strength, small change of a re-firing line, small porosity, high volume density and high refractoriness. Meanwhile, the corrosion-resistant brick for the incinerator has good acid and alkali resistance, and can be used for different parts and different working conditions in the incinerator. Therefore, the corrosion-resistant brick for the incinerator, which is prepared by the invention, solves the problem of short service life of the existing refractory brick, and reduces the production cost.
Description
Technical Field
The invention belongs to the field of refractory materials, and particularly relates to a corrosion-resistant brick for an incinerator and a preparation method thereof.
Technical Field
The incineration treatment of the garbage by the incinerator is an important approach for purifying the ecological environment, and the pollution of the garbage can be effectively relieved. The incinerator is a harmless treatment device which burns and carbonizes objects to be treated at high temperature by using the combustion of fuels such as coal, fuel oil, fuel gas and the like so as to achieve the aim of disinfection, and is commonly used for harmless treatment of medical and domestic waste products and animals. The average temperature typically exceeds 850 degrees celsius during operation of the incinerator and can reach and be maintained above 1000 degrees celsius during actual operation. Therefore, the incinerator needs to be protected by refractory materials inside the incinerator, and the refractory materials can play a role in seamless building in a hearth.
The refractory brick is a shaped refractory material, and various types are available at present, but in actual work, the existing refractory brick is often seriously corroded along with the prolonging of the service time of a kiln, so that damage generated after the long-time continuous operation of an incinerator is often repaired, the working efficiency is reduced, and the production cost is increased. Therefore, there is a need for a new corrosion-resistant brick for an incinerator, which not only maintains the excellent performance of the refractory brick, but also can resist acid and alkali so as to maintain the long-term stable operation of the incinerator.
Disclosure of Invention
In order to solve the technical problems, the invention provides a corrosion-resistant brick for an incinerator, which comprises refractory aggregate, filling fine powder and a binder;
wherein the refractory aggregate comprises bauxite, corundum and limestone; the filling fine powder comprises graphite powder and laterite powder; the adhesive is phenolic resin.
In some embodiments, the weight ratio of the refractory aggregate, the filling fine powder and the binder is 60-70:25-40:10-20.
in some embodiments, the weight part ratio of the bauxite, the corundum and the limestone is 40-45:15-20:5; the weight part ratio of the graphite powder to the red soil powder is 15-20:5-20.
in some of these embodiments, the bauxite has a particle size of 3 to 8mm.
In some of these embodiments, the limestone has a particle size of 2-5mm.
In some of these embodiments, the graphite powder has a particle size of 0.088mm or less.
In some of these embodiments, the laterite powder particle size is ≦ 0.088mm.
In some of these embodiments, the laterite powder is carbonate rock laterite powder.
In some of these embodiments, the binder is a biochar-modified phenolic resin.
In some embodiments, the preparation method of the biochar modified phenolic resin comprises the following steps: and mixing the charcoal powder with phenolic resin, and heating to obtain the charcoal modified phenolic resin.
In some of these embodiments, the charcoal fines are straw charcoal fines and/or corn charcoal fines.
In some embodiments, when the charcoal powder is straw charcoal powder and corn charcoal powder, the weight ratio of the straw charcoal powder to the corn charcoal powder is 1:1.
in some embodiments, the temperature of the charcoal powder mixed with the phenolic resin is 30-45 ℃.
In some embodiments, the charcoal powder is mixed with phenolic resin and heated at 30-45 deg.C for 20-50min.
In some of the embodiments, the corrosion-resistant brick for the incinerator further comprises a corrosion-resistant coating; the anti-corrosion coating is coated on the refractory bricks.
In some of these embodiments, the corrosion resistant coating comprises: fly ash, mineral powder, phenolic resin and water.
In some embodiments, the weight part ratio of the fly ash, the mineral powder, the phenolic resin and the water is 5-10:3-5:40-50:10-15.
in some embodiments, the fly ash has a ferro-silico-alumino-content of 70% or greater.
In some of these embodiments, the ore fines are ultra fine ore fines.
In some embodiments, the preparation method of the anticorrosive paint comprises the following steps: mixing the fly ash, the mineral powder, the phenolic resin and water, and carrying out ultrasonic treatment for 10-30min to obtain the anticorrosive coating.
The invention also provides a preparation method of the corrosion-resistant brick for the incinerator, which comprises the following steps: and (3) keeping the refractory aggregate, the filling fine powder and water at 30-50 ℃ for 20-60min, mixing the adhesive, and keeping the temperature at 200-400 ℃ for 120-240min to obtain the corrosion-resistant brick for the incinerator.
In some embodiments, the preparation method further comprises soaking the corrosion-resistant bricks in the anticorrosive paint for the incinerator.
The invention also provides the application of any corrosion-resistant brick for the incinerator or any corrosion-resistant brick prepared by the preparation method in manufacturing and/or repairing the incinerator.
Compared with the prior art, the invention has the beneficial effects that:
the corrosion-resistant brick for the incinerator has the advantages of high compressive strength, small change of a re-firing line, small porosity, high volume density and high refractoriness. Meanwhile, the corrosion-resistant brick for the incinerator has good acid and alkali resistance, and can be used for different parts and different working conditions in the incinerator. Therefore, the corrosion-resistant brick for the incinerator, which is prepared by the invention, solves the problem of short service life of the existing refractory brick.
The corrosion-resistant brick for the incinerator can be constructed according to different construction parts, has strong fire resistance and strong acid-base corrosion resistance, prolongs the service life of the refractory brick, and reduces the production cost.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The starting materials used in the present invention are commercially available.
Example 1
A corrosion-resistant brick for an incinerator comprises refractory aggregate, filling fine powder and a bonding agent; wherein the refractory aggregate comprises bauxite, corundum and limestone; the filling fine powder comprises graphite powder and carbonate rock red soil powder; the adhesive is biochar modified phenolic resin. The weight part ratio of the refractory aggregate, the filling fine powder and the adhesive is 70:40:20. wherein the bauxite, the corundum and the limestone are mixed according to the weight part ratio of 45:20:5; the weight part ratio of the graphite powder to the carbonate rock red soil powder is 20:20. wherein the particle size of the bauxite is 3mm; the particle size of the limestone is 2mm; the particle size of the graphite powder is less than or equal to 0.088mm; the grain diameter of the laterite powder is less than or equal to 0.088mm. Wherein the content of ferro-silico-aluminum in the fly ash is more than or equal to 70 percent; the mineral powder is superfine mineral powder.
The anticorrosive paint comprises the following components: fly ash, mineral powder, phenolic resin and water; the weight part ratio of the fly ash to the mineral powder to the phenolic resin to the water is 10:5:50:15. mixing the raw materials of the anticorrosive paint, and carrying out ultrasonic treatment for 30min to obtain the anticorrosive paint.
The preparation method of the adhesive biochar modified phenolic resin comprises the following steps: the weight part ratio of the corn biochar to the phenolic resin is 6:25; mixing the corn charcoal powder and phenolic resin, and then preserving the heat for 60min at 80 ℃ to prepare the biochar modified phenolic resin.
The preparation method of the corrosion-resistant brick for the incinerator comprises the following steps: and (3) keeping the refractory aggregate, the filling fine powder and water at 50 ℃ for 60min, mixing the adhesive, keeping the temperature at 400 ℃ for 240min, extruding by a pug mill and a die, and cutting to obtain the refractory brick. And soaking the refractory bricks in the anticorrosive paint, and preserving heat for 8 hours at 400 ℃ to obtain the anticorrosive bricks for the incinerator.
Example 2
A corrosion-resistant brick for an incinerator comprises refractory aggregate, filling fine powder and a bonding agent; wherein the refractory aggregate comprises bauxite, corundum and limestone; the filling fine powder comprises graphite powder and carbonate rock-red soil powder; the adhesive is biochar modified phenolic resin. The weight part ratio of the refractory aggregate, the filling fine powder and the adhesive is 60:25:10. wherein the bauxite, the corundum and the limestone are mixed according to the weight part ratio of 40:15:5; the weight part ratio of the graphite powder to the carbonate rock red soil powder is 15:5. wherein the particle size of the bauxite is 8mm; the particle size of the limestone is 5mm; the particle size of the graphite powder is less than or equal to 0.088mm; the grain diameter of the laterite powder is less than or equal to 0.088mm. Wherein the content of silicon, aluminum and iron in the fly ash is more than or equal to 70 percent; the mineral powder is superfine mineral powder.
The anticorrosive paint comprises the following components: fly ash, mineral powder, phenolic resin and water; the weight part ratio of the fly ash to the mineral powder to the phenolic resin to the water is 5:3:40:10. mixing the raw materials of the anticorrosive paint, and carrying out ultrasonic treatment for 10min to obtain the anticorrosive paint.
The preparation method of the adhesive biochar modified phenolic resin comprises the following steps: the weight part ratio of the straw biochar to the phenolic resin is 2:15; mixing the straw charcoal powder with phenolic resin, and then preserving heat for 30min at 45 ℃ to prepare the charcoal modified phenolic resin.
The preparation method of the corrosion-resistant brick for the incinerator comprises the following steps: and (3) keeping the refractory aggregate, the filling fine powder and water at 30 ℃ for 20min, mixing the adhesive, keeping the temperature at 200 ℃ for 120min, extruding by a pug mill and a die, and cutting to obtain the refractory brick. And soaking the refractory bricks in the anticorrosive coating, and preserving heat for 4 hours at 200 ℃ to obtain the anticorrosive bricks for the incinerator.
Example 3
A corrosion-resistant brick for an incinerator comprises refractory aggregate, filling fine powder and a bonding agent; wherein the refractory aggregate comprises bauxite, corundum and limestone; the filling fine powder comprises graphite powder and carbonate rock red soil powder; the adhesive is biochar modified phenolic resin. The weight part ratio of the refractory aggregate, the filling fine powder and the adhesive is 65:30:15. wherein the bauxite, corundum and limestone are mixed according to the weight part ratio of 43:17:5; the weight part ratio of the graphite powder to the carbonate rock red soil powder is 18:13. wherein the particle size of the bauxite is 8mm; the particle size of the limestone is 4mm; the particle size of the graphite powder is less than or equal to 0.088mm; the grain diameter of the laterite powder is less than or equal to 0.088mm. Wherein the content of ferro-silico-aluminum in the fly ash is more than or equal to 70 percent; the mineral powder is superfine mineral powder.
The anticorrosive paint comprises the following components: coal ash, mineral powder, phenolic resin and water; the weight part ratio of the fly ash to the mineral powder to the phenolic resin to the water is 7:4:45:12. mixing the raw materials of the anticorrosive paint, and performing ultrasonic treatment for 20min to obtain the anticorrosive paint.
The preparation method of the adhesive biochar modified phenolic resin comprises the following steps: the weight part ratio of the straw biochar to the phenolic resin is 4:20; mixing the straw charcoal powder and phenolic resin, and then keeping the temperature at 60 ℃ for 45min to prepare the charcoal modified phenolic resin.
The preparation method of the corrosion-resistant brick for the incinerator comprises the following steps: and (3) keeping the refractory aggregate, the filling fine powder and water at 40 ℃ for 50min, mixing the adhesive, keeping the temperature at 300 ℃ for 190min, extruding by a pug mill and a die, and cutting to obtain the refractory brick. And soaking the refractory bricks in the anticorrosive paint, and preserving heat for 6 hours at 300 ℃ to obtain the anticorrosive bricks for the incinerator.
Example 4
A corrosion-resistant brick for an incinerator comprises refractory aggregate, filling fine powder and an adhesive; wherein the refractory aggregate comprises bauxite, corundum and limestone; the filling fine powder comprises graphite powder and carbonate rock red soil powder; the adhesive is biochar modified phenolic resin. The weight part ratio of the refractory aggregate, the filling fine powder and the adhesive is 60:40:20. wherein the bauxite, the corundum and the limestone are mixed according to the weight part ratio of 40:20:5; the weight part ratio of the graphite powder to the carbonate rock red soil powder is 15:20. wherein the particle size of the bauxite is 5mm; the particle size of the limestone is 3mm; the particle size of the graphite powder is less than or equal to 0.088mm; the grain diameter of the laterite powder is less than or equal to 0.088mm. Wherein the content of ferro-silico-aluminum in the fly ash is more than or equal to 70 percent; the mineral powder is superfine mineral powder.
The anticorrosive paint comprises the following components: fly ash, mineral powder, phenolic resin and water; the weight part ratio of the fly ash to the mineral powder to the phenolic resin to the water is 10:3:50:15. mixing the raw materials of the anticorrosive paint, and performing ultrasonic treatment for 20min to obtain the anticorrosive paint.
The preparation method of the adhesive biochar modified phenolic resin comprises the following steps: the weight portion ratio of the corn biochar to the phenolic resin is 2:15; mixing the corn charcoal powder and phenolic resin, and then preserving heat for 50min at 80 ℃ to prepare the charcoal modified phenolic resin.
The preparation method of the corrosion-resistant brick for the incinerator comprises the following steps: and (3) keeping the refractory aggregate, the filling fine powder and water at 35 ℃ for 35min, mixing the adhesive, keeping the temperature at 280 ℃ for 160min, extruding by a pug mill and a die, and cutting to obtain the refractory brick. And soaking the refractory bricks in the anticorrosive paint, and preserving heat for 8 hours at 200 ℃ to obtain the anticorrosive bricks for the incinerator.
Example 5
A corrosion-resistant brick for an incinerator comprises refractory aggregate, filling fine powder and a bonding agent; wherein the refractory aggregate comprises bauxite, corundum and limestone; the filling fine powder comprises graphite powder and carbonate rock red soil powder; the adhesive is biochar modified phenolic resin. The weight part ratio of the refractory aggregate, the filling fine powder and the adhesive is 60:40:20. wherein the bauxite, the corundum and the limestone are mixed according to the weight part ratio of 40:20:5; the weight part ratio of the graphite powder to the carbonate rock red soil powder is 18:5. wherein the particle size of the bauxite is 3mm; the particle size of the limestone is 2mm; the particle size of the graphite powder is less than or equal to 0.088mm; the grain diameter of the laterite powder is less than or equal to 0.088mm. Wherein the content of ferro-silico-aluminum in the fly ash is more than or equal to 70 percent; the mineral powder is superfine mineral powder.
The anticorrosive paint comprises the following components: fly ash, mineral powder, phenolic resin and water; the weight part ratio of the fly ash to the mineral powder to the phenolic resin to the water is 8:5:43:14. mixing the raw materials of the anticorrosive paint, and carrying out ultrasonic treatment for 25min to obtain the anticorrosive paint.
The preparation method of the adhesive biochar modified phenolic resin comprises the following steps: the weight portion ratio is 1:1, the ratio of the straw charcoal powder to the corn charcoal powder to the phenolic resin in parts by weight is 5:25; mixing the straw charcoal powder and the corn charcoal powder with phenolic resin, and then preserving heat for 30min at 80 ℃ to prepare the charcoal modified phenolic resin.
The preparation method of the corrosion-resistant brick for the incinerator comprises the following steps: and (3) keeping the refractory aggregate, the filling fine powder and water at 30 ℃ for 40min, mixing the adhesive, keeping the temperature at 200 ℃ for 240min, extruding by a pug mill and a die, and cutting to obtain the refractory brick. And soaking the refractory bricks in the anticorrosive paint, and preserving heat for 8 hours at 200 ℃ to obtain the anticorrosive bricks for the incinerator.
Example 6
A corrosion-resistant brick for an incinerator comprises refractory aggregate, filling fine powder and a bonding agent; wherein the refractory aggregate comprises bauxite, corundum and limestone; the filling fine powder comprises graphite powder and carbonate rock red soil powder; the adhesive is biochar modified phenolic resin. The weight part ratio of the refractory aggregate, the filling fine powder and the adhesive is 60:29:17. wherein the bauxite, the corundum and the limestone are mixed according to the weight part ratio of 40:16:5; the weight part ratio of the graphite powder to the carbonate rock red soil powder is 19:10. wherein the particle size of the bauxite is 8mm; the particle size of the limestone is 5mm; the particle size of the graphite powder is less than or equal to 0.088mm; the grain diameter of the laterite powder is less than or equal to 0.088mm. Wherein the content of ferro-silico-aluminum in the fly ash is more than or equal to 70 percent; the mineral powder is superfine mineral powder.
The anticorrosive paint comprises the following components: fly ash, mineral powder, phenolic resin and water; the weight part ratio of the fly ash to the mineral powder to the phenolic resin to the water is 10:3:50:10. mixing the raw materials of the anticorrosive paint, and carrying out ultrasonic treatment for 30min to obtain the anticorrosive paint.
The preparation method of the adhesive biochar modified phenolic resin comprises the following steps: the weight portion ratio is 1:1, the weight part ratio of the straw charcoal powder to the corn charcoal powder to the phenolic resin is 2:25; mixing the straw charcoal powder and the corn charcoal powder with phenolic resin, and then preserving heat for 30min at 80 ℃ to prepare the charcoal modified phenolic resin.
The preparation method of the corrosion-resistant brick for the incinerator comprises the following steps: and (3) keeping the refractory aggregate, the filling fine powder and water at 40 ℃ for 20min, mixing the adhesive, keeping the temperature at 350 ℃ for 140min, extruding by a pug mill and a die, and cutting to obtain the refractory brick. And (3) soaking the refractory bricks outside in the anticorrosive coating, and preserving heat for 6 hours at 200 ℃ to obtain the anticorrosive bricks for the incinerator.
Comparative example 1
The raw material composition and preparation method of the corrosion-resistant brick for an incinerator are the same as those of example 2, and the only difference is that the adhesive is common phenolic resin.
Comparative example 2
The raw material composition and preparation method of the corrosion-resistant brick for the incinerator are the same as those in example 2, and the only difference is that in the preparation of the adhesive biochar modified phenolic resin, the straw biochar is replaced by peanut shell biochar.
Comparative example 3
The raw material composition and preparation method of the corrosion-resistant brick for the incinerator are the same as those in example 2, and the only difference is that in the preparation of the adhesive biochar modified phenolic resin, the straw biochar is replaced by walnut shell biochar.
Comparative example 4
The raw material composition and preparation method of the corrosion-resistant brick for the incinerator are the same as those of example 2, and the only difference is that the content of silicon, aluminum and iron in the fly ash is 50-60%.
Comparative example 5
The raw material composition and preparation method of the corrosion-resistant brick for the incinerator are the same as those of example 2, and the only difference is that the refractory brick is not soaked by the anticorrosive paint.
Test example 1
The performance of the corrosion-resistant bricks for incinerators prepared in examples 1 to 6 and comparative examples 1 to 5 was tested, and the test items and test methods are shown in table 1 and the test results are shown in table 2.
TABLE 1
TABLE 2
From the above results, it is understood that the corrosion-resistant bricks for incinerators prepared in examples 1 to 6 of the present invention have high compressive strength, small change in dead firing line, small porosity, large volume density, and high refractoriness; therefore, the corrosion-resistant brick for the incinerator, prepared by the invention, has good fire resistance. The corrosion-resistant bricks for incinerators prepared in comparative examples 1, 4 to 5 of the invention have performance inferior to the corrosion-resistant bricks for incinerators prepared in examples 1 to 6; the corrosion-resistant bricks for an incinerator prepared in comparative examples 2 to 3 have slightly inferior performance to the corrosion-resistant bricks for an incinerator prepared in examples 1 to 6, but superior performance to the corrosion-resistant bricks for an incinerator prepared in comparative examples 1, 4 to 5.
Test example 2
The alkali resistance of the corrosion-resistant bricks for the incinerator prepared in the examples 1-6 and the comparative examples 1-5 is detected, and the specific method comprises the following steps: 60mm 20mm corrosion resistant brick for incinerator in saturated Ca (OH) 2 After soaking in the solution for 168 hours, the corrosion-resistant bricks for the incinerator prepared in the examples 1-6 have no cracking or peeling phenomenon. The corrosion-resistant bricks for incinerators prepared in comparative examples 1 to 4 all showed no cracking or peeling, but the corrosion-resistant bricks for incinerators prepared in comparative example 5 showed cracking or peeling.
The acid resistance of the corrosion-resistant bricks for incinerators prepared in examples 1 to 6 was measured by the following specific method: the acid resistance of the 60 mm. Times.60 mm. Times.20 mm corrosion-resistant bricks for incinerators was measured before immersion in 5% HCl solution and after immersion for 168 hours, and the acid resistance of the corrosion-resistant bricks for incinerators prepared in examples 1 to 6 was 99.8% or more. The acid resistance of the corrosion-resistant brick for the incinerator prepared in the comparative examples 2-3 is more than or equal to 99.8 percent; the acid resistance of the corrosion-resistant bricks for an incinerator prepared in comparative examples 1, 4 to 5 was less than 99.8%, and the acid resistance of the corrosion-resistant bricks for an incinerator prepared in comparative example 5 was the smallest.
In conclusion, the corrosion-resistant brick for the incinerator, prepared by the invention, has the advantages of high compressive strength, small change of a re-firing line, small porosity, high volume density and high refractoriness, namely, has good refractory performance. Meanwhile, the corrosion-resistant brick for the incinerator has excellent acid and alkali resistance. The corrosion-resistant material for the incinerator is small in corrosion-resistant porosity and large in volume density, can effectively prevent corrosion of corrosive substances to the corrosion-resistant surface of the incinerator, and reduces the corrosion speed of the corrosive substances to the corrosion-resistant interior of the incinerator. Therefore, the corrosion-resistant brick for the incinerator can be used for different parts and different working conditions in the incinerator.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (10)
1. The corrosion-resistant brick for the incinerator is characterized by comprising refractory aggregate, filling fine powder and a bonding agent;
wherein the refractory aggregate comprises bauxite, corundum and limestone; the filling fine powder comprises graphite powder and laterite powder; the adhesive is phenolic resin.
2. The corrosion-resistant brick for the incinerator according to claim 1, wherein the weight part ratio of the refractory aggregate, the filling fine powder and the binder is 60-70:25-40:10-20.
3. the corrosion-resistant brick for the incinerator according to claim 2, wherein the weight part ratio of bauxite, corundum and limestone is 40-45:15-20:5; the weight part ratio of the graphite powder to the red soil powder is 15-20:5-20.
4. the corrosion-resistant brick for the incinerator according to claim 1, wherein the binder is a biochar modified phenolic resin.
5. The corrosion-resistant brick for the incinerator according to claim 4, wherein a preparation method of the biochar modified phenolic resin comprises the following steps: and mixing the biochar powder with phenolic resin, and heating to prepare the biochar modified phenolic resin.
6. The corrosion-resistant brick for the incinerator according to claim 1, wherein the corrosion-resistant brick for the incinerator further comprises an anticorrosive coating; the anti-corrosion coating is coated on the refractory bricks.
7. The corrosion-resistant brick for incinerator according to claim 6, characterized in that said anticorrosive paint comprises: fly ash, mineral powder, phenolic resin and water.
8. A method for preparing a corrosion-resistant brick for an incinerator according to any one of claims 1 to 5, comprising: and (3) keeping the refractory aggregate, the filling fine powder and water at the temperature of 30-50 ℃ for 20-60min, mixing the adhesive, and keeping the temperature at 200-400 ℃ for 120-240min to obtain the corrosion-resistant brick for the incinerator.
9. The method of claim 8, further comprising immersing the furnace with a corrosion resistant brick in an anticorrosive paint.
10. Use of the corrosion-resistant brick for an incinerator according to any one of claims 1 to 7 or the corrosion-resistant brick for an incinerator manufactured by the manufacturing method according to any one of claims 8 to 9 in manufacturing and/or repairing an incinerator.
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| CN115974568B (en) | 2023-12-19 |
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