CN117342862A - Wear-resistant castable for high-temperature wear part of inner liner of thermal kiln and preparation method thereof - Google Patents
Wear-resistant castable for high-temperature wear part of inner liner of thermal kiln and preparation method thereof Download PDFInfo
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- CN117342862A CN117342862A CN202311387846.0A CN202311387846A CN117342862A CN 117342862 A CN117342862 A CN 117342862A CN 202311387846 A CN202311387846 A CN 202311387846A CN 117342862 A CN117342862 A CN 117342862A
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- resistant castable
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- zirconia
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- 238000002360 preparation method Methods 0.000 title abstract description 13
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims abstract description 54
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 15
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 14
- 239000010431 corundum Substances 0.000 claims abstract description 14
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000011230 binding agent Substances 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 10
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 9
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 9
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000004568 cement Substances 0.000 claims abstract description 7
- 238000002156 mixing Methods 0.000 claims description 20
- 239000002994 raw material Substances 0.000 claims description 12
- 239000007767 bonding agent Substances 0.000 claims description 5
- 238000004806 packaging method and process Methods 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 229910019142 PO4 Inorganic materials 0.000 claims description 2
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 2
- 238000010521 absorption reaction Methods 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 2
- 239000010452 phosphate Substances 0.000 claims description 2
- 229910052710 silicon Inorganic materials 0.000 claims description 2
- 239000010703 silicon Substances 0.000 claims description 2
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 10
- 230000035939 shock Effects 0.000 abstract description 3
- 238000005336 cracking Methods 0.000 abstract description 2
- 239000011819 refractory material Substances 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000005299 abrasion Methods 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
- C04B35/101—Refractories from grain sized mixtures
- C04B35/106—Refractories from grain sized mixtures containing zirconium oxide or zircon (ZrSiO4)
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
- C04B35/101—Refractories from grain sized mixtures
- C04B35/103—Refractories from grain sized mixtures containing non-oxide refractory materials, e.g. carbon
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
- C04B2235/3222—Aluminates other than alumino-silicates, e.g. spinel (MgAl2O4)
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/38—Non-oxide ceramic constituents or additives
- C04B2235/3817—Carbides
- C04B2235/3826—Silicon carbides
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/38—Non-oxide ceramic constituents or additives
- C04B2235/3852—Nitrides, e.g. oxynitrides, carbonitrides, oxycarbonitrides, lithium nitride, magnesium nitride
- C04B2235/3873—Silicon nitrides, e.g. silicon carbonitride, silicon oxynitride
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/40—Metallic constituents or additives not added as binding phase
- C04B2235/402—Aluminium
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/42—Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
- C04B2235/428—Silicon
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/44—Metal salt constituents or additives chosen for the nature of the anions, e.g. hydrides or acetylacetonate
- C04B2235/447—Phosphates or phosphites, e.g. orthophosphate, hypophosphite
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
Abstract
The invention belongs to the technical field of refractory materials, and particularly relates to a wear-resistant castable for a high-temperature wear part of a lining of a thermal kiln and a preparation method thereof. The wear-resistant castable comprises 58-65% of fused zirconia corundum, 10-15% of silicon carbide, 2-7% of alumina micropowder, 5-10% of zirconia, 5-12% of pure calcium aluminate cement and 2-7% of antioxidant; also included are inorganic binders. The wear-resistant castable for the high-temperature wear part of the inner liner of the thermal kiln has higher compressive strength, lower wear coefficient and better thermal shock stability, and the high toughness and wear resistance of the material in the use process are effectively ensured by using zirconia corundum, silicon carbide and zirconia, so that the phenomena of cracking and wear are avoided, and the service life of the material is prolonged.
Description
Technical Field
The invention belongs to the field of refractory materials, and particularly relates to a high-toughness wear-resistant castable for a high-temperature wear part of a lining of a thermal kiln and a preparation method thereof.
Background
With the increasing complexity of the working conditions of the thermal kiln, the load in the kiln is increased, the abrasion of a material inlet and a local part is obviously increased when the equipment operates, and the service life of the whole kiln lining is unbalanced, so that the abrasion resistance requirement on lining materials is also improved in order to improve the whole service life of the equipment, the lining materials have high toughness and high abrasion resistance which are key factors for improving the service life of the thermal kiln, the traditional process achieves the abrasion-resistant aim by increasing the normal temperature compression strength of the lining and adding abrasion-resistant raw materials, but the technical advantage cannot be fully reflected in the high temperature process, and the traditional method cannot solve the problem well.
Disclosure of Invention
In view of the above, the technical problem to be solved by the invention is to provide a wear-resistant castable for a high-temperature wear part of a lining of a thermal kiln and a preparation method thereof, aiming at the defects of the prior art, so that the wear-resistant castable has good toughness and wear resistance in the high-temperature use process.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the wear-resistant castable for the high-temperature wear part of the inner liner of the thermal kiln comprises the following components in percentage by mass:
the sum of the components is 100 percent, and the weight percentage of the sum of the components is additionally added:
5-10% of inorganic binder.
Preferably, the wear-resistant castable comprises the following components in percentage by mass:
the sum of the components is 100 percent, and the weight percentage of the sum of the components is additionally added:
6% of inorganic binder.
Preferably, the grain diameter of the fused zirconia corundum is 6-0.044mm, the porosity is less than or equal to 3%, the water absorption is less than or equal to 1.5%, the alumina content is more than or equal to 95%, and the zirconia content is more than or equal to 4%.
Preferably, the grain diameter of the silicon carbide is 1-0.032mm, and the content of the silicon carbide is more than or equal to 98%.
Preferably, the grain diameter of the alumina micro powder is less than or equal to 0.0015mm, and the content of alumina is more than or equal to 99.5%.
Preferably, the grain diameter of the zirconia is less than or equal to 0.005mm, and the zirconia content is more than or equal to 99%.
Preferably, the grain diameter of the pure calcium aluminate cement is less than or equal to 0.044mm, and the alumina content is more than or equal to 75%.
Preferably, the antioxidant is any one of metal silicon, metal aluminum and silicon nitride, and the particle size is 300-500 meshes.
Preferably, the binder is a liquid phosphate.
The second technical aim of the invention is to claim a preparation method of the wear-resistant castable for the high-temperature wear part of the inner liner of the thermal kiln, which comprises the following steps:
(1) Accurately metering the required raw materials by an automatic metering system;
(2) Mixing the metered raw materials by an inclined mixer to ensure uniform mixing of particles and fine powder;
(3) And metering the package through an automatic package packaging system.
The invention discloses a wear-resistant castable for a high-temperature wear part of a lining of a thermal kiln and a preparation method thereof, and has the following beneficial effects:
(1) The zirconia corundum is used as a main raw material, so that the zirconia corundum has higher compressive strength and toughness, can effectively resist material washing, and avoids damage caused by physical washing.
(2) According to the invention, silicon carbide is added, so that the wear resistance of the product is effectively improved.
(3) The zirconium oxide is added in the invention, so that the toughness of the product is further improved, and the product has better wear resistance.
(4) According to the invention, the antioxidant is introduced for the first time, and the decomposition of silicon carbide in the oxidizing atmosphere is effectively inhibited or slowed down by utilizing the inertia of the antioxidant, so that the stability of the material structure is ensured in the use process, and the wear resistance of the material is improved.
Detailed Description
The following will clearly and completely describe the technical solutions in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but 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.
The word "embodiment" as used herein does not necessarily mean that any embodiment described as "exemplary" is preferred or advantageous over other embodiments. Performance index testing in the examples herein, unless otherwise indicated, was performed using conventional testing methods in the art. It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure.
Unless otherwise defined, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; other test methods and techniques not specifically identified herein are those commonly employed by those of ordinary skill in the art.
Numerous specific details are set forth in the following examples in order to provide a better understanding of the present application. It will be understood by those skilled in the art that the present application may be practiced without some of these specific details. In the examples, some methods, means, instruments, devices, etc. well known to those skilled in the art are not described in detail in order to highlight the gist of the present application.
On the premise of no conflict, the technical features disclosed in the embodiments of the present application may be combined arbitrarily, and the obtained technical solution belongs to the disclosure of the embodiments of the present application.
The present invention will be further specifically illustrated by the following examples, which are not to be construed as limiting the invention, but rather as falling within the scope of the present invention, for some non-essential modifications and adaptations of the invention that are apparent to those skilled in the art based on the foregoing disclosure.
Example 1
The sum of the components is 100 percent, and the weight percentage of the sum of the components is additionally added:
6% of inorganic binder.
The preparation method comprises the following steps:
(1) Controlling the humidity of the preparation environment below 25%, and then accurately metering the required raw materials;
(2) Adding the metered fused zirconia corundum and silicon carbide into a mixer through a forced mixer for mixing for 3 minutes;
(3) Adding 1% of inorganic binder after the fused zirconia corundum and the silicon carbide are uniformly mixed, and mixing for 2 minutes;
(4) Adding 4% of zirconia and mixing for 3 minutes;
(5) Adding 1% of inorganic binder, and mixing for 2 minutes;
(6) Adding the rest raw materials (alumina micropowder, pure calcium aluminate cement and antioxidant) and mixing for 3 min;
(7) And metering the package through an automatic package packaging system.
(8) When in use, the rest 4 percent of inorganic bonding agent is added for mixing for 8 minutes.
In order to further demonstrate the beneficial effects of the present invention for a better understanding of the present invention, the technical features disclosed herein are further illustrated by the following comparative examples, which are not to be construed as limiting the present invention. Other modifications of the invention which do not involve the inventive work, as would occur to those skilled in the art in light of the foregoing teachings, are also considered to be within the scope of the invention.
Comparative example 1
The sum of the components is 100 percent, and the weight percentage of the sum of the components is additionally added:
6% of inorganic binder.
The preparation method comprises the following steps:
(1) Controlling the humidity of the preparation environment below 25%, and then accurately metering the required raw materials;
(2) Adding the metered fused zirconia corundum and silicon carbide into a mixer through a forced mixer for mixing for 3 minutes;
(3) Adding 1% of inorganic binder after the fused zirconia corundum and the silicon carbide are uniformly mixed, and mixing for 2 minutes;
(4) Adding 4% of zirconia and mixing for 3 minutes;
(5) Adding 1% of inorganic binder, and mixing for 2 minutes;
(6) Adding the rest raw materials (alumina micropowder, pure calcium aluminate cement and antioxidant) and mixing for 3 min;
(7) And metering the package through an automatic package packaging system.
(8) When in use, the rest 4 percent of inorganic bonding agent is added for mixing for 8 minutes.
Comparative example 2
The sum of the components is 100 percent, and the weight percentage of the sum of the components is additionally added:
6% of inorganic binder.
The preparation method comprises the following steps:
(1) Controlling the humidity of the preparation environment below 25%, and then accurately metering the required raw materials;
(2) Adding the metered fused zirconia corundum and silicon carbide into a mixer through a forced mixer for mixing for 3 minutes;
(3) Adding 1% of inorganic binder after the fused zirconia corundum and the silicon carbide are uniformly mixed, and mixing for 2 minutes;
(4) Adding the rest raw materials (alumina micropowder, pure calcium aluminate cement and antioxidant) and mixing for 3 min;
(5) And metering the package through an automatic package packaging system.
(6) When in use, the rest 5 percent of inorganic bonding agent is added for mixing for 8 minutes.
The castable prepared by the above examples and comparative examples are compared in performance, and specific data are shown in the table:
| primary performance name | Example 1 | Comparative example 1 | Comparative example 2 |
| Normal temperature compressive strength | 125MPa | 110MPa | 96MPa |
| High temperature compressive strength at 1300 DEG C | 98MPa | 56MPa | 48MPa |
| High-temperature bending strength at 1370 DEG C | 32MPa | 22MPa | 18MPa |
| 1100 ℃ water cooling thermal shock resistance | 28 times | 17 times | 12 times |
| Coefficient of wear resistance | 3.8 | 5.6 | 6.7 |
Therefore, the wear-resistant castable for the high-temperature wear part of the inner lining of the thermal kiln disclosed by the invention has higher compressive strength, lower wear resistance coefficient and better thermal shock stability, the high toughness and wear resistance of the material in the use process can be effectively ensured by using zirconia corundum and zirconia, and the more the zirconia is, the better the sintering performance of the brick is, and the most obvious technical index improvement is achieved. Avoid the phenomena of cracking and abrasion, and prolong the service life of the material.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The wear-resistant castable for the high-temperature wear part of the inner liner of the thermal kiln is characterized by comprising the following components in percentage by mass:
2. the wear-resistant castable for the high-temperature wear part of the inner liner of the thermal kiln according to claim 1, wherein the wear-resistant castable further comprises an inorganic binder; the inorganic bonding agent is liquid phosphate, and the inorganic bonding agent accounts for 5-10% of the mass of the wear-resistant castable.
3. The wear-resistant castable for the high-temperature wear part of the inner lining of the thermal kiln according to claim 2, wherein the wear-resistant castable comprises the following components in percentage by mass:
x is 6% of the sum of the mass of the fused zirconia corundum, the silicon carbide, the alumina micro powder, the zirconia, the pure calcium aluminate cement and the antioxidant.
4. The wear-resistant castable for the high-temperature wear part of the inner lining of the thermal kiln according to any one of claims 1-3, wherein the grain size of the fused zirconia corundum is 6-0.044mm, the porosity is less than or equal to 3%, the water absorption rate is less than or equal to 1.5%, the alumina content is more than or equal to 95%, and the zirconia content is more than or equal to 4%.
5. A wear-resistant castable for high-temperature wear parts of a thermal kiln lining according to any one of claims 1-3, wherein the grain size of the silicon carbide is 1-0.032mm, and the silicon carbide content is more than or equal to 98%.
6. The wear-resistant castable for the high-temperature wear part of the inner lining of the thermal kiln according to any one of claims 1 to 3, wherein the particle size of the alumina micro powder is less than or equal to 0.0015mm, and the alumina content is more than or equal to 99.5%.
7. The wear-resistant castable for the high-temperature wear part of the inner lining of the thermal kiln according to any one of claims 1 to 3, wherein the grain size of the zirconia is less than or equal to 0.005mm, and the zirconia content is more than or equal to 99%.
8. The wear-resistant castable for the high-temperature wear part of the inner lining of the thermal kiln according to any one of claims 1-3, wherein the grain size of the pure calcium aluminate cement is less than or equal to 0.044mm, and the alumina content is more than or equal to 75%.
9. The wear-resistant castable for the high-temperature wear part of the inner lining of the thermal kiln according to any one of claims 1 to 3, wherein the antioxidant is any one of metal silicon, metal aluminum and silicon nitride, and the particle size is 300-500 meshes.
10. A method for preparing the wear-resistant castable for the high-temperature wear part of the inner liner of the thermal kiln as claimed in any one of claims 1 to 3, comprising the following steps:
(1) Accurately metering the required raw materials by an automatic metering system;
(2) Mixing the metered raw materials by a mixer to ensure uniform mixing of particles and fine powder;
(3) And metering the package through an automatic package packaging system.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311387846.0A CN117342862A (en) | 2023-10-25 | 2023-10-25 | Wear-resistant castable for high-temperature wear part of inner liner of thermal kiln and preparation method thereof |
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| CN202311387846.0A CN117342862A (en) | 2023-10-25 | 2023-10-25 | Wear-resistant castable for high-temperature wear part of inner liner of thermal kiln and preparation method thereof |
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|---|---|
| CN (1) | CN117342862A (en) |
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2023
- 2023-10-25 CN CN202311387846.0A patent/CN117342862A/en active Pending
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