CN117486623A - High wear-resistant brick and preparation method thereof - Google Patents
High wear-resistant brick and preparation method thereof Download PDFInfo
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- CN117486623A CN117486623A CN202311202876.XA CN202311202876A CN117486623A CN 117486623 A CN117486623 A CN 117486623A CN 202311202876 A CN202311202876 A CN 202311202876A CN 117486623 A CN117486623 A CN 117486623A
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- 239000011449 brick Substances 0.000 title claims abstract description 73
- 238000002360 preparation method Methods 0.000 title claims description 15
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 33
- 239000010431 corundum Substances 0.000 claims abstract description 33
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 claims abstract description 32
- 229910052863 mullite Inorganic materials 0.000 claims abstract description 32
- 239000002994 raw material Substances 0.000 claims abstract description 31
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 17
- 229920005610 lignin Polymers 0.000 claims abstract description 13
- 239000000843 powder Substances 0.000 claims abstract description 12
- 238000005245 sintering Methods 0.000 claims abstract description 12
- 239000011230 binding agent Substances 0.000 claims abstract description 11
- 239000002245 particle Substances 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims description 18
- 239000000047 product Substances 0.000 claims description 15
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 10
- 239000008187 granular material Substances 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 8
- 238000012216 screening Methods 0.000 claims description 8
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 238000007580 dry-mixing Methods 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- 238000000227 grinding Methods 0.000 claims description 6
- 239000003963 antioxidant agent Substances 0.000 claims description 5
- 230000003078 antioxidant effect Effects 0.000 claims description 5
- 238000000498 ball milling Methods 0.000 claims description 4
- 239000000428 dust Substances 0.000 claims description 4
- 239000007789 gas Substances 0.000 claims description 4
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 3
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 3
- XJKVPKYVPCWHFO-UHFFFAOYSA-N silicon;hydrate Chemical compound O.[Si] XJKVPKYVPCWHFO-UHFFFAOYSA-N 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical group CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 claims description 2
- 238000007664 blowing Methods 0.000 claims description 2
- 235000010354 butylated hydroxytoluene Nutrition 0.000 claims description 2
- 238000004140 cleaning Methods 0.000 claims description 2
- 239000000084 colloidal system Substances 0.000 claims description 2
- 239000003344 environmental pollutant Substances 0.000 claims description 2
- 239000004519 grease Substances 0.000 claims description 2
- 239000004615 ingredient Substances 0.000 claims description 2
- 239000011812 mixed powder Substances 0.000 claims description 2
- 239000002808 molecular sieve Substances 0.000 claims description 2
- 239000004033 plastic Substances 0.000 claims description 2
- 231100000719 pollutant Toxicity 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 239000011265 semifinished product Substances 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims description 2
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 2
- 239000002912 waste gas Substances 0.000 claims description 2
- 238000005303 weighing Methods 0.000 claims description 2
- 229910004298 SiO 2 Inorganic materials 0.000 claims 3
- 238000007599 discharging Methods 0.000 claims 1
- 239000004568 cement Substances 0.000 abstract description 11
- 239000003795 chemical substances by application Substances 0.000 abstract description 5
- 230000001737 promoting effect Effects 0.000 abstract description 5
- 239000002131 composite material Substances 0.000 abstract description 3
- 239000011819 refractory material Substances 0.000 abstract description 3
- 238000004901 spalling Methods 0.000 abstract description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 2
- 239000011707 mineral Substances 0.000 abstract description 2
- 239000007767 bonding agent Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 238000000465 moulding Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Abstract
The application relates to the technical field of refractory materials and discloses a high wear-resistant brick which is mainly prepared from the following raw materials in percentage by mass: 8-12 wt% of brown corundum with the granularity of 5-3mm, 20-25wt% of brown corundum with the granularity of 3-1mm and 18-22wt% of brown corundum with the granularity of 1-0 mm; 10-15wt% of mullite with granularity of 3-1mm and 6-10wt% of mullite with granularity of less than or equal to 0.088 mm; 15-20wt% of silicon carbide with granularity less than or equal to 0.088 mm; 6-10wt% of Guangxi white mud with granularity less than or equal to 0.088mm and the total weight of the raw materials3-4% lignin solution is used as a binding agent, and Al in the brown corundum particles 2 O 3 More than or equal to 95 percent; mullite grains and Al in fine powder 2 O 3 ≥70％、S iO 2 Less than or equal to 30 percent; s i C in the silicon carbide powder is more than or equal to 97%, and Al in Guangxi white mud fine powder 2 O 3 ≥32％、S i O 2 Less than or equal to 48 percent. The high-wear-resistance medium brown corundum, the silicon carbide and the mullite are all high-purity high-wear-resistance raw materials, and a compact and firmly-combined composite mineral phase is formed at a high temperature by adding the sintering promoting agent, so that the wear resistance and the spalling resistance of the product are remarkably improved, and the high-wear-resistance medium brown corundum, the silicon carbide and the mullite are applied to a kiln mouth of a cement kiln, and can effectively prolong the service life of a masonry body.
Description
Technical Field
The invention relates to the technical field of refractory materials, in particular to a high wear-resistant brick and a preparation method thereof.
Background
The high wear-resistant brick is a refractory material product with excellent wear resistance, and is particularly suitable for the parts with serious flushing of cement clinker at the kiln mouth of a cement kiln. The refractory bricks commonly used for bricking the kiln mouth of the cement kiln in the past are all traditional products, such as common high-alumina bricks and phosphate-bonded high-alumina bricks, and the products have poor wear resistance, low bonding strength, no scouring resistance and serious peeling damage, thereby shortening the service cycle and influencing the improvement of the yield of cement clinker. The high wear-resistant brick starts from the preferred raw materials, brown alumina with excellent wear resistance is firstly selected as the main raw material, pointed mullite is used as the secondary raw material, silicon carbide fine powder capable of improving the crystal structure in the sintering process is introduced, guangxi white mud is added as a sintering promoting agent, the grain composition is adjusted, the proportion is reasonably optimized, a firm composite crystalline phase is formed through high-temperature sintering, the compressive strength and the wear resistance of the product are greatly improved, the common high-alumina brick and the phosphate-bonded high-alumina brick of the traditional product are replaced, and the service life is prolonged by more than one time.
Disclosure of Invention
The invention aims to provide a high wear-resistant brick for a kiln mouth of a cement kiln and a preparation method thereof, which improve the wear resistance and spalling resistance of products and have the advantages of compact structure at high temperature, firm combination, difficult damage, conventional manufacturing process, easy construction and the like.
In order to achieve the above purpose, the invention is realized by the following technical scheme: the high wear-resistant brick is mainly prepared from the following raw materials in percentage by mass: 8-12 wt% of brown corundum with the granularity of 5-3mm, 20-25wt% of brown corundum with the granularity of 3-1mm and 18-22wt% of brown corundum with the granularity of 1-0 mm; 10-15wt% of mullite with granularity of 3-1mm and 6-10wt% of mullite with granularity of less than or equal to 0.088 mm; 15-20wt% of silicon carbide with granularity less than or equal to 0.088 mm; 6-10wt% of Guangxi white mud with granularity less than or equal to 0.088mm and 3-4% of lignin solution which is the total weight of the raw materials are used as a binding agent.
Preferably, A l in the brown corundum particles 2 O 3 More than or equal to 95 percent; a l of mullite grains and fine powder 2 O 3 ≥70％、S i O 2 Less than or equal to 30 percent; s i C in the silicon carbide powder is more than or equal to 97%, and A l in Guangxi white mud fine powder 2 O 3 ≥32％、S i O 2 ≤48％。
Preferably, the sintering promoting agent is Guangxi white mud, and the bonding agent is lignin solution.
Preferably, the high wear-resistant brick is mainly prepared from the following raw materials in percentage by mass: 8-12 wt% of brown corundum with the granularity of 5-3mm, 20-25wt% of brown corundum with the granularity of 3-1mm and 18-22wt% of brown corundum with the granularity of 1-0 mm; 10-15wt% of mullite with granularity of 3-1mm and 6-10wt% of mullite with granularity of less than or equal to 0.088 mm; 15-20wt% of silicon carbide with granularity less than or equal to 0.088 mm; 6-10wt% of Guangxi white mud with granularity less than or equal to 0.088mm and 3-4% of lignin solution which is the total weight of the raw materials are used as a binding agent. Al in the high wear-resistant brick 2 O 3 ≥62％、S i C≥15％、S iO 2 ≤13％。
A high wear-resistant brick and a preparation method thereof comprise the following steps:
step one, raw material pretreatment: firstly, weighing raw materials and ingredients with the granularity requirement, then screening the weighed main materials, simultaneously matching and placing the materials obtained by screening according to the matching proportion of brown alumina particles and mullite particles into a mixer for dry mixing for 2-3 minutes, and simultaneously adding an antioxidant in the mixer during dry mixing;
step two, auxiliary material treatment: adding a binding agent into the mixed granule A obtained by dry mixing treatment, and placing the mixture in a stirring mill for mixing and grinding for 3-5 minutes;
step three, material collection: mixing and grinding the obtained mixed granule A, placing the mixed granule A into a stirring tank, adding a binding agent and silicon carbide fine powder during stirring, and mixing and grinding the Guangxi white mud fine powder for 8-10 minutes to obtain semi-dry plastic mud material, so as to discharge;
step four, the mixed pug A is weighed according to the weight required by a process card, then is added into a green brick die to be formed, a 630t electric control screw press is needed to be adopted for green brick forming, a self-contained demolding system of a pressing machine is utilized for demolding, the demolded green brick is placed on a drying vehicle, and the volume density of a semi-finished product is controlled to be 2.95-3.02g/cm 3 ；
Step five, conveying the drying vehicle with the green bricks into a dryer, and detecting residual moisture contained in the green bricks after drying at 110-120 ℃ for 24 hours to ensure that the residual moisture is less than or equal to 0.7%;
step six, the dried green bricks are put into a kiln car through the transportation of operators, are pushed into a 110 m high-temperature tunnel, are subjected to high temperature of 1580 ℃ in the kiln, and are fired for 10-12 hours to obtain the finished products of the wear-resistant bricks.
Preferably, in the first step, the fineness condition of the mixed powder is 180-200 meshes.
Preferably, the sixth step further includes the following steps:
s701, preparation: an operator needs to place the finished brick body of the wear-resistant brick in a cleaning box, clean the finished brick body of the wear-resistant brick for 10-60min, ensure that the surface of the brick body is clean and smooth and has no grease, dust or other pollutants;
s702, preparing a coating: pairing the silicon nitride, titanium nitride, silicon carbide and water mounting proportion required by the hard coating, then conveying the silicon nitride, titanium nitride, silicon carbide and water mounting proportion into a stirring tank, and stirring to form a large amount of smeared colloid;
s703, preparing and smearing by a smearing machine: the operator needs to put the finished brick body of the wear-resistant brick into a brush-coating machine, and brushes the finished brick body of the wear-resistant brick for 10-30 min.
Preferably, the antioxidant is 2, 6-di-tert-butyl-p-cresol.
Preferably, the screening is performed by using a 180-mesh molecular sieve, the oversize materials are conveyed back to the ball mill by pipeline vacuum and ball milling is performed again, ball milling and screening are performed completely in a sealing mode, the materials are conveyed by vacuum, the gas materials are separated by air blowing vibration, and dust-containing waste gas after gas material separation is filtered by a filter element filter.
The invention provides a high wear-resistant brick and a preparation method thereof. The beneficial effects are as follows:
the invention has the advantages that the high-wear-resistance medium brown corundum, the silicon carbide and the mullite are all high-purity high-wear-resistance raw materials, a compact and firmly combined composite mineral phase is formed at high temperature by adding the sintering promoting agent, the wear resistance and the spalling resistance of the product are obviously improved, and the service life of a masonry body can be effectively prolonged when the product is applied to a kiln mouth of a cement kiln.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Embodiment one:
the embodiment of the invention provides a high wear-resistant brick which is mainly prepared from the following raw materials in percentage by mass: 8-12 wt% of brown corundum with the granularity of 5-3mm, 20-25wt% of brown corundum with the granularity of 3-1mm and 18-22wt% of brown corundum with the granularity of 1-0 mm; 10-15wt% of mullite with granularity of 3-1mm and 6-10wt% of mullite with granularity of less than or equal to 0.088 mm; 15-20wt% of silicon carbide with granularity less than or equal to 0.088 mm; 6-10wt% of Guangxi white mud with granularity less than or equal to 0.088mm and 3-4% of lignin solution which is the total weight of the raw materials are used as a binding agent.
A l in the brown corundum particles 2 O 3 More than or equal to 95 percent; mullite grains and Al in fine powder 2 O 3 ≥70％、S i O 2 Less than or equal to 30 percent; s i C in the silicon carbide powder is more than or equal to 97%, and Al in Guangxi white mud fine powder 2 O 3 ≥32％、S iO 2 ≤48％。
The sintering promoting agent is Guangxi white mud, and the bonding agent is lignin solution.
The high wear-resistant brick is mainly prepared from the following raw materials in percentage by mass: 8-12 wt% of brown corundum with the granularity of 5-3mm, 20-25wt% of brown corundum with the granularity of 3-1mm and 18-22wt% of brown corundum with the granularity of 1-0 mm; 10-15wt% of mullite with granularity of 3-1mm and 6-10wt% of mullite with granularity of less than or equal to 0.088 mm; 15-20wt% of silicon carbide with granularity less than or equal to 0.088 mm; 6-10wt% of Guangxi white mud with granularity less than or equal to 0.088mm and 3-4% of lignin solution which is the total weight of the raw materials are used as a binding agent. Al in the high wear-resistant brick 2 O 3 ≥62％、S i C≥15％、S iO 2 ≤13％。
The raw materials are mixed and ground by a wet mill, then a 630t electric control screw press is adopted for molding and blank making, the blank is dried at 110-120 ℃ for 24 hours and then is loaded into a kiln, and the finished product of the wear-resistant brick can be obtained by high-temperature sintering at 1580 ℃. The main chemical components and performance indexes are shown in table 1.
Embodiment two:
the high wear-resistant brick for the kiln mouth of the cement kiln adopts 8wt% of brown alumina with the granularity of 5-3mm, 25wt% of brown alumina with the granularity of 3-1mm, 20wt% of brown alumina with the granularity of 1-0mm, 11wt% of mullite with the granularity of 3-1mm, 10wt% of mullite with the granularity of less than or equal to 0.088mm, 16wt% of silicon carbide with the granularity of less than or equal to 0.088mm, 10wt% of Guangxi white mud with the granularity of less than or equal to 0.088mm and lignin solution accounting for 3.5% of the total weight of the raw materials as a bonding agent. Al in the high wear-resistant brick 2 O 3 ≥62％、S i C≥15％、S iO 2 ≤13％。
The raw materials are mixed and ground by a wet mill, then a 630t electric control screw press is adopted for molding and blank making, the blank is dried at 110-120 ℃ for 24 hours and then is loaded into a kiln, and the finished product of the wear-resistant brick can be obtained by high-temperature sintering at 1580 ℃. The main chemical components and performance indexes are shown in table 1.
Embodiment III:
the high wear-resistant brick for the kiln mouth of the cement kiln adopts brown corundum 9wt% with the granularity of 5-3mm, brown corundum 23wt% with the granularity of 3-1mm, brown corundum 21wt% with the granularity of 1-0mm, mullite 12wt% with the granularity of 3-1mm, mullite 9wt% with the granularity of less than or equal to 0.088mm, silicon carbide 17wt% with the granularity of less than or equal to 0.088mm, guangxi white mud 9wt% with the granularity of less than or equal to 0.088mm and lignin solution accounting for 3.5% of the total weight of the raw materials as a bonding agent. Al in the high wear-resistant brick 2 O 3 ≥62％、S i C≥15％、S iO 2 ≤13％。
The raw materials are mixed and ground by a wet mill, then a 630t electric control screw press is adopted for molding and blank making, the blank is dried at 110-120 ℃ for 24 hours and then is loaded into a kiln, and the finished product of the wear-resistant brick can be obtained by high-temperature sintering at 1580 ℃. The main chemical components and performance indexes are shown in table 1.
Embodiment four:
the high wear-resistant brick for the kiln mouth of the cement kiln adopts 11wt% of brown corundum with the granularity of 5-3mm, 24wt% of brown corundum with the granularity of 3-1mm, 18wt% of brown corundum with the granularity of 1-0mm, 14wt% of mullite with the granularity of 3-1mm, 7wt% of mullite with the granularity of less than or equal to 0.088mm, 20wt% of silicon carbide with the granularity of less than or equal to 0.088mm, 6wt% of Guangxi white mud with the granularity of less than or equal to 0.088mm and lignin solution accounting for 3.5% of the total weight of the raw materials as a bonding agent. Al in the high wear-resistant brick 2 O 3 ≥62％、S i C≥15％、S iO 2 ≤13％。
The raw materials are mixed and ground by a wet mill, then a 630t electric control screw press is adopted for molding and blank making, the blank is dried at 110-120 ℃ for 24 hours and then is loaded into a kiln, and the finished product of the wear-resistant brick can be obtained by high-temperature sintering at 1580 ℃. The main chemical components and performance indexes are shown in table 1.
Ratio 1:
the preparation method of this comparative example was the same as in example one, except that no brown fused alumina particles were added to the mixed raw material at the time of carrying out the step.
Comparative example 2:
the preparation method of this comparative example was the same as that of example one, except that the mullite grains were not added during the mixing of the raw materials at the time of carrying out the step one.
Comparative example 3:
the preparation method of this comparative example was the same as in example one, except that no antioxidant was added internally during the second step.
Table 1 examples one to 4 high wear resistant brick performance index
The first-fourth related technical indexes of the embodiment can meet the requirement of cement kiln mouth, and compared with the first embodiment, the granule grading is more reasonable, the dosage of 5-3mm critical large granule is moderate, and the addition amount of various fine powders is optimal. The preferred embodiment is helpful for improving the volume density and compressive strength of the product, and has the best wear resistance and lowest wear rate under the same experimental conditions.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. The high wear-resistant brick is characterized by being prepared from the following raw materials in percentage by mass: 8-12 wt% of brown corundum with the granularity of 5-3mm, 20-25wt% of brown corundum with the granularity of 3-1mm and 18-22wt% of brown corundum with the granularity of 1-0 mm; 10-15wt% of mullite with granularity of 3-1mm and 6-10wt% of mullite with granularity of less than or equal to 0.088 mm; 15-20wt% of silicon carbide with granularity less than or equal to 0.088 mm; 6-10wt% of Guangxi white mud with granularity less than or equal to 0.088mm and 3-4% of lignin solution which is the total weight of the raw materials are used as a binding agent.
2. A high wear resistant brick according to claim 1, wherein Al in said brown alumina particles 2 O 3 More than or equal to 95 percent; mullite grains and Al in fine powder 2 O 3 ≥70％、SiO 2 Less than or equal to 30 percent; siC in the silicon carbide powder is more than or equal to 97%, al in Guangxi white mud fine powder 2 O 3 ≥32％、SiO 2 ≤48％。
3. The high wear brick of claim 1 wherein the sintering promoter is white guangxi mud and the binder is lignin solution.
4. The high wear-resistant brick according to claim 1, wherein the high wear-resistant brick is mainly prepared from the following raw materials in percentage by mass: 8-12 wt% of brown corundum with the granularity of 5-3mm, 20-25wt% of brown corundum with the granularity of 3-1mm and 18-22wt% of brown corundum with the granularity of 1-0 mm; 10-15wt% of mullite with granularity of 3-1mm and 6-10wt% of mullite with granularity of less than or equal to 0.088 mm; 15-20wt% of silicon carbide with granularity less than or equal to 0.088 mm; 6-10wt% of Guangxi white mud with granularity less than or equal to 0.088mm and 3-4% of lignin solution which is the total weight of the raw materials are used as a binding agent. Al in the high wear-resistant brick 2 O 3 ≥62％、SiC≥15％、SiO 2 ≤13％。
5. A high wear resistant tile according to any one of claims 1 to 4, comprising the steps of:
step one, raw material pretreatment: firstly, weighing raw materials and ingredients with the granularity requirement, then screening the weighed main materials, simultaneously matching and placing the materials obtained by screening according to the matching proportion of brown alumina particles and mullite particles into a mixer for dry mixing for 2-3 minutes, and simultaneously adding an antioxidant in the mixer during dry mixing;
step two, auxiliary material treatment: adding a binding agent into the mixed granule A obtained by dry mixing treatment, and placing the mixture in a stirring mill for mixing and grinding for 3-5 minutes;
step three, material collection: mixing and grinding the obtained mixed granule A, placing the mixed granule A into a stirring tank, adding silicon carbide fine powder, mullite fine powder and Guangxi white mud fine powder during stirring, and mixing and grinding for 8-10 minutes to obtain semi-dry plastic mud material, and discharging;
step four, mixing the mud material A according to the engineeringThe required weight of the art card is weighed and then added into a green brick mould to be pressed for forming, when the green brick is formed, a 630t electric control spiral press is adopted for blank making, a self-contained mould-stripping system of a press machine is utilized for mould stripping, the mould-stripped green brick is placed on a drying vehicle, and the volume density of a semi-finished product is controlled to be 2.95-3.02g/cm 3 ；
Step five, conveying the drying vehicle with the green bricks into a dryer, and detecting residual moisture contained in the green bricks after drying at 110-120 ℃ for 24 hours to ensure that the residual moisture is less than or equal to 0.7%;
step six, the dried green bricks are put into a kiln car through the transportation of operators, are pushed into a 110 m high-temperature tunnel, are subjected to high temperature of 1580 ℃ in the kiln, and are fired for 10-12 hours to obtain the finished products of the wear-resistant bricks.
6. The high wear-resistant brick and the preparation method thereof according to claim 5, wherein in the first step, the fineness condition of the mixed powder is 180-200 meshes.
7. The high wear-resistant brick and the preparation method thereof according to claim 5, wherein the sixth step further comprises the following steps:
s701, preparation: an operator needs to place the finished brick body of the wear-resistant brick in a cleaning box, clean the finished brick body of the wear-resistant brick for 10-60min, ensure that the surface of the brick body is clean and smooth and has no grease, dust or other pollutants;
s702, preparing a coating: the silicon nitride, titanium nitride, silicon carbide and water which are needed by the hard coating are matched in proportion, and then are conveyed into a stirring tank for stirring to form a large amount of smeared colloid;
s703, preparing and smearing by a smearing machine: the operator needs to put the finished brick body of the wear-resistant brick into a brush-coating machine, and brushes the finished brick body of the wear-resistant brick for 10-30 min.
8. The high wear-resistant brick and the preparation method thereof according to claim 5, wherein the antioxidant is 2, 6-di-tert-butyl-p-cresol.
9. The high wear-resistant brick and the preparation method thereof according to claim 6, wherein the screening is performed by using a 180-mesh molecular sieve, the oversize is conveyed back to a ball mill by pipeline vacuum and ball milling is performed again, ball milling and screening are performed completely in a sealing manner, the materials are conveyed by vacuum, the gas materials are separated by air blowing vibration, and dust-containing waste gas after gas material separation is filtered by a filter element filter.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311202876.XA CN117486623A (en) | 2023-09-18 | 2023-09-18 | High wear-resistant brick and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311202876.XA CN117486623A (en) | 2023-09-18 | 2023-09-18 | High wear-resistant brick and preparation method thereof |
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| CN117486623A true CN117486623A (en) | 2024-02-02 |
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- 2023-09-18 CN CN202311202876.XA patent/CN117486623A/en active Pending
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