CN114890007A - High-strength composite ceramic wear-resistant lining and preparation method thereof - Google Patents
High-strength composite ceramic wear-resistant lining and preparation method thereof Download PDFInfo
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- CN114890007A CN114890007A CN202210683705.2A CN202210683705A CN114890007A CN 114890007 A CN114890007 A CN 114890007A CN 202210683705 A CN202210683705 A CN 202210683705A CN 114890007 A CN114890007 A CN 114890007A
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- resistant
- alumina powder
- prefabricated part
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- 239000000919 ceramic Substances 0.000 title claims abstract description 19
- 239000002131 composite material Substances 0.000 title claims abstract description 18
- 238000002360 preparation method Methods 0.000 title description 8
- 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 35
- 239000000843 powder Substances 0.000 claims abstract description 35
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229910052849 andalusite Inorganic materials 0.000 claims abstract description 19
- 239000011159 matrix material Substances 0.000 claims abstract description 17
- 239000000835 fiber Substances 0.000 claims abstract description 16
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 16
- 239000002270 dispersing agent Substances 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims abstract description 13
- 238000004519 manufacturing process Methods 0.000 claims abstract description 5
- 239000002994 raw material Substances 0.000 claims description 38
- 239000000203 mixture Substances 0.000 claims description 23
- 238000000227 grinding Methods 0.000 claims description 11
- 238000002156 mixing Methods 0.000 claims description 10
- 239000007787 solid Substances 0.000 claims description 8
- 235000019982 sodium hexametaphosphate Nutrition 0.000 claims description 7
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 claims description 7
- 235000019832 sodium triphosphate Nutrition 0.000 claims description 7
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 6
- 238000000748 compression moulding Methods 0.000 claims description 5
- 238000003723 Smelting Methods 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 4
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical group 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 description 10
- 229910052863 mullite Inorganic materials 0.000 description 10
- 238000005299 abrasion Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 238000001816 cooling Methods 0.000 description 4
- 239000010410 layer Substances 0.000 description 4
- 239000012071 phase Substances 0.000 description 4
- 230000035939 shock Effects 0.000 description 4
- 238000005245 sintering Methods 0.000 description 4
- 239000013078 crystal Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 238000011049 filling Methods 0.000 description 3
- 230000036571 hydration Effects 0.000 description 3
- 238000006703 hydration reaction Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
- 229910004283 SiO 4 Inorganic materials 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 239000010431 corundum Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D90/00—Component parts, details or accessories for large containers
- B65D90/02—Wall construction
- B65D90/04—Linings
-
- 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
-
- 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
- C04B35/16—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 silicates other than clay
- C04B35/18—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 silicates other than clay rich in aluminium oxide
-
- 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
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
-
- 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
- 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
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/349—Clays, e.g. bentonites, smectites such as montmorillonite, vermiculites or kaolines, e.g. illite, talc or sepiolite
-
- 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
- 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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- 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
- 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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- 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
- 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
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/52—Constituents or additives characterised by their shapes
- C04B2235/5208—Fibers
- C04B2235/5216—Inorganic
- C04B2235/524—Non-oxidic, e.g. borides, carbides, silicides or nitrides
- C04B2235/5244—Silicon carbide
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention discloses a high-strength composite ceramic wear-resistant lining, which comprises a lining body, wherein the lining body is a prefabricated body with a male interface and a female interface, the prefabricated body consists of a base body and a wear-resistant body wrapped outside the base body, and the wear-resistant body consists of alumina powder, Guangxi white mud, water and rho-Al 2 O 3 And the matrix consists of andalusite, alumina powder, aluminum powder, silicon carbide fiber and a dispersing agent. The invention improves the impact resistance and wear resistance, adapts to the production condition with high smelting strength to the utmost extent, prolongs the service life by more than three times, reduces the maintenance frequency and ensures the production continuity of equipment.
Description
Technical Field
The invention relates to the technical field of refractory materials, in particular to a high-strength composite ceramic wear-resistant lining and a preparation method thereof.
Background
At present, the smelting intensity of the iron-making industry is generally increased, the storage and transportation capacity of an ore groove bin is greatly increased, the rotating speed of a belt is increased in multiples, the gravity acceleration generates larger impact force on the surface of a wear-resistant layer when materials enter the ore groove bin, and a large amount of red ores are associated, so that the performance requirements of impact resistance, abrasion resistance and high temperature resistance are provided for a lining plate. Especially, impact-resistant, abrasion-resistant and high-temperature-resistant performance requirements are also required for impact-resistant parts such as a machine head and tail blanking point of a belt conveyor, a chute blanking point and the like. The traditional ceramic wear-resistant spray paint has the advantages of low plasticity, low hardness, large thickness, large using amount, unsmooth surface, easy material blockage, and no more than 3 years of service life; the position of the slag falling point of the traditional wear-resistant castable is difficult to solve, the castable is not resistant to burning and impact, a small amount of red slag is discharged, the surface layer of the wear-resistant layer is burnt, the whole wear-resistant layer can be rapidly peeled off, the castable is poured on the anchoring piece, the wear-resistant layer can be only frequently smeared and maintained after being destroyed, and the maintenance period is long.
Disclosure of Invention
The invention aims to provide a high-strength composite ceramic wear-resistant lining and a preparation method thereof.
The technical scheme adopted by the invention for realizing the purpose is as follows: the high-strength composite ceramic wear-resistant lining comprises a lining body, wherein the lining body is a prefabricated body with a male interface and a female interface, the prefabricated body consists of a base body and a wear-resistant body wrapped outside the base body, and the wear-resistant body consists of alumina powder, Guangxi white mud, water and rho-Al 2 O 3 And a dispersant, wherein the weight percentage of each raw material is as follows: 90-95% of alumina powder, 4.5-9.5% of Guangxi white mud and the balance of water and rho-Al 2 O 3 The weight of the dispersant accounts for 0.5 to 1.1 percent of the total weight of the raw materials; the matrix consists of andalusite, alumina powder, aluminum powder, silicon carbide fiber and a dispersing agent, and the weight percentages of the raw materials are as follows: 80-90% of andalusite, 5-10% of alumina powder, 4-6% of aluminum powder and 1-4% of silicon carbide fiber, wherein the weight of the dispersant accounts for 0.5-1.1% of the total weight of the raw materials.
In the invention, the particle diameters of the alumina powder and the Guangxi white mud are both 800 meshes.
The dispersant of the invention is sodium tripolyphosphate and/or sodium hexametaphosphate.
The preparation method of the high-strength composite ceramic wear-resistant lining comprises the following steps: firstly, mixing andalusite, alumina powder and silicon carbide fiber serving as raw materials of a matrix, then putting the mixture into a ball mill for grinding, then equally dividing the mixture into two parts with the same quantity, adding the rest of aluminum powder into one part, putting the raw materials without the aluminum powder into a pre-prepared mould, and performing compression molding on a prefabricated part A;
mixing raw materials of the wear-resistant body, putting the mixture into a ball mill for grinding until the raw materials reach 2000 meshes, adding the mixture into a press, vacuumizing, and forming a prefabricated part B;
step three, the prefabricated part B is arranged outside the prefabricated part A, the raw material added with the aluminum powder is filled between the prefabricated part A and the prefabricated part B after being smelted into a semi-solid state, and after being cooled, the raw material is dried at the temperature of 500-1600 ℃ to discharge the moisture, and then is sintered at the temperature of 1500-1600 ℃ to prepare the prefabricated part.
In the wear resistant body of the invention: the addition amount of the white mud is small, and the rho-Al is combined by hydration 2 O 3 Supplementing, the main chemical components of the white mud: al (Al) 2 O 3 18%、SiO 2 72%、K 2 O 5.7%、Na 2 O 0.11%、Fe 2 O 3 0.7 percent of the additive is compounded with white mud, can play a role in strengthening the green body and is beneficial to smoothly removing the mold core.
ρ-Al 2 O 3 Is hydrated and combined, and forms alpha-Al after being calcined 2 O 3 And the impurities are not introduced, so that the high-temperature performance of the prefabricated part is not influenced.
ρ-Al 2 O 3 After hydration, chemical bound water is generated and can be completely removed at 500-600 ℃. Gel is generated in the hydration process, so that the stress generated in the heating and cooling process of the material is reduced to be below a crystal boundary, and the strength and the anti-cracking capability of the material are improved.
In the invention, the white mud can form a certain low-temperature liquid phase to promote the sintering of alumina powder, and part of free SiO in the white mud 2 With Al in the raw material 2 O 3 The powder reacts to generate acicular secondary mullite which is uniformly distributed in the whole product and plays a role in toughening particles. The invention has corundum as main crystal phase, mullite as secondary crystal phase and a small amount of glass phase.
The heat conductivity of the wear-resistant body is about 1.22w/m.k, so that the temperature of the outer surface of a using part is lower, the volume density is more than 3.0, the refractoriness under load is 1260 ℃, the Mohs hardness is 7-8 grades, and the abrasion is about 0.3 per mill/h.
Mainly adopts 90-95% of alumina powderMixing and firing west white mud 4.5-9.5%, white mud and a small amount of rho-Al 2 O 3 Can be used as an adhesive for toughening the aluminum oxide material without adding a bonding agent.
In the matrix of the invention: al (Al) 2 [SiO 4 ]O is the main mineral of andalusite raw material, and mullite Al is generated when heating is used 2 O 3 ·2SiO 2 And high silica SiO 2 A glassy phase. Andalusite is decomposed into mullite and high-silica glass, the mullite is in a network structure, part of the high-silica glass is moved outwards from the inside of the particles, a plurality of micropores are reserved, the micropores can buffer thermal stress and prevent cracks from expanding, part of the high-silica glass reserved in the particles also has the function of buffering the thermal stress, and the high-silica glass also has the function of repairing thermal shock cracks of adhesion.
The mullite reaction of andalusite is accompanied by about 6% expansion, so that the compression during the compressive creep can be counteracted; free SiO produced 2 The mullite migrates out of andalusite particles and can react with added alumina powder and alumina powder in the wear-resistant body to generate mullite, and the mullite is also accompanied with volume expansion, so that compression during compressive creep can be counteracted, and the generated mullite interlaced network structure is also beneficial to creep resistance.
The silicon carbide fiber has the deflection and stopping effects on the cracks in the matrix, prevents the cracks from expanding and growing to form a net-shaped micro-crack structure, and effectively improves the thermal shock resistance and the fracture toughness of the product.
The invention utilizes the grinding body to wrap the matrix, (1) improves the impact resistance and wear resistance, adapts to the production condition with high smelting strength to the utmost extent, prolongs the service life by more than three times, reduces the maintenance frequency and ensures the production continuity of equipment. (2) Not only has wear resistance, but also has thermal shock resistance and creep resistance.
Detailed Description
The high-strength composite ceramic wear-resistant lining comprises a lining body, wherein the lining body is a prefabricated body with a male interface and a female interface, the prefabricated body consists of a base body and a wear-resistant body wrapped outside the base body, and the wear-resistant body consists of alumina powder, Guangxi white mud, water and rho-Al 2 O 3 And dispersant, the weight of each raw materialThe weight percentage is as follows: 90-95% of alumina powder, 4.5-9.5% of Guangxi white mud and the balance of water and rho-Al 2 O 3 The weight of the dispersant accounts for 0.5 to 1.1 percent of the total weight of the raw materials; the matrix consists of andalusite, alumina powder, aluminum powder, silicon carbide fiber and a dispersing agent, and the weight percentages of the raw materials are as follows: 80-90% of andalusite, 5-10% of alumina powder, 4-6% of aluminum powder and 1-4% of silicon carbide fiber, wherein the weight of the dispersant accounts for 0.5-1.1% of the total weight of the raw materials.
Example 1
The high-strength composite ceramic wear-resistant lining comprises a lining body, wherein the lining body is a prefabricated body with male and female interfaces, and the prefabricated body consists of a base body and a wear-resistant body wrapped outside the base body. The wear-resistant body consists of 95 percent of alumina powder, 4.3 percent of Guangxi white mud, 0.2 percent of water and 0.5 percent of rho-Al 2 O 3 Composition, in addition: sodium tripolyphosphate, 0.56%; 0.5 percent of sodium hexametaphosphate. The matrix consists of 90 percent of andalusite, 5 percent of alumina powder, 4 percent of aluminum powder and 1 percent of silicon carbide fiber, and in addition: sodium tripolyphosphate, 0.56%; 0.5 percent of sodium hexametaphosphate.
The preparation method of the high-strength composite ceramic wear-resistant lining comprises the following steps:
firstly, mixing andalusite, alumina powder and silicon carbide fiber serving as raw materials of a matrix, then putting the mixture into a ball mill for grinding, then equally dividing the mixture into two parts with the same quantity, adding the rest of aluminum powder into one part, putting the raw materials without the aluminum powder into a pre-prepared mould, and performing compression molding on a prefabricated part A;
mixing the raw materials of the wear-resistant body, putting the mixture into a ball mill for grinding until the granularity reaches 2000 meshes, adding the mixture into a press machine, vacuumizing and forming a prefabricated part B;
and step three, placing the prefabricated part B outside the prefabricated part A, melting the raw materials added with the aluminum powder into a semi-solid state, filling the semi-solid state between the prefabricated part A and the prefabricated part B, cooling, drying at 600 ℃ to discharge water, and sintering at 1500 ℃ to obtain the prefabricated part. The heat conductivity of the wear-resistant body is 1.26w/m.k, and the abrasion is 0.22 per mill/h.
Example 2
The high-strength composite ceramic wear-resistant lining includes lining body, said lining body is a prefabricated body with male and female interfaces, said prefabricated body is formed from base body and wear-resisting body wrapped outside the base body. The wear-resistant body consists of 90 percent of alumina powder, 9.5 percent of Guangxi white mud, 0.2 percent of water and 0.3 percent of rho-Al 2 O 3 Composition, in addition: 0.5 percent of sodium tripolyphosphate; 0.45 percent of sodium hexametaphosphate. The matrix consists of 82% andalusite, 10% alumina powder, 4% aluminum powder and 4% silicon carbide fiber, and additionally: 0.5 percent of sodium tripolyphosphate; 0.45 percent of sodium hexametaphosphate.
The preparation method of the high-strength composite ceramic wear-resistant lining comprises the following steps:
firstly, mixing andalusite, alumina powder and silicon carbide fibers serving as raw materials of a matrix, then putting the mixture into a ball mill for grinding, then equally dividing the mixture into two parts with the same quantity, adding the alumina powder into one part, putting the raw materials without the alumina powder into a prepared die, and performing compression molding on a prefabricated part A;
mixing the raw materials of the wear-resistant body, putting the mixture into a ball mill for grinding until the granularity reaches 2000 meshes, adding the mixture into a press machine, vacuumizing and forming a prefabricated part B;
and step three, placing the prefabricated part B outside the prefabricated part A, melting the raw materials added with the aluminum powder into a semi-solid state, filling the semi-solid state between the prefabricated part A and the prefabricated part B, cooling, drying at 580 ℃ to discharge water, and sintering at 1600 ℃ to obtain the prefabricated part. The heat conductivity of the wear-resistant body is 1.24w/m.k, and the abrasion is 0.21 per mill/h.
Example 3
The high-strength composite ceramic wear-resistant lining comprises a lining body, wherein the lining body is a prefabricated body with male and female interfaces, and the prefabricated body consists of a base body and a wear-resistant body wrapped outside the base body. The wear-resistant body consists of 94 percent of alumina powder, 5.5 percent of Guangxi white mud, 0.3 percent of water and 0.2 percent of rho-Al 2 O 3 Composition, in addition: 0.6 percent of sodium hexametaphosphate. The matrix consists of 86% of andalusite, 6% of alumina powder, 6% of aluminum powder and 2% of silicon carbide fiber, and additionally: 1.1 percent of sodium tripolyphosphate.
The preparation method of the high-strength composite ceramic wear-resistant lining comprises the following steps:
firstly, mixing andalusite, alumina powder and silicon carbide fiber serving as raw materials of a matrix, putting the mixture into a ball mill for grinding, dividing the mixture into two parts with equal quantity, adding the alumina powder into one part, putting the raw materials without the alumina powder into a prepared mould, and performing compression molding on a prefabricated part A;
mixing the raw materials of the wear-resistant body, putting the mixture into a ball mill for grinding until the granularity reaches 2000 meshes, adding the mixture into a press machine, vacuumizing and forming a prefabricated part B;
and step three, placing the prefabricated part B outside the prefabricated part A, smelting the raw materials added with the aluminum powder into a semi-solid state, filling the semi-solid state between the prefabricated part A and the prefabricated part B, cooling, drying at 500 ℃, discharging water, and sintering at 1560 ℃ to obtain the prefabricated part. The heat conductivity of the wear-resistant body is 1.25w/m.k, and the abrasion is 0.21 per mill/h.
The prefabricated part can endure the temperature of 300-450 ℃, and the thickness of the prefabricated part is 1/4 of the wear-resistant castable, so that the load of the bin body can be relatively reduced; the requirements of the iron front system on wear-resistant, high-temperature-resistant and shock-resistant materials are met, and the maintenance frequency is reduced.
Claims (4)
1. High strength composite ceramic wear-resistant lining, including the lining body, this lining body is the prefabricated body that has the negative interface, its characterized in that: the prefabricated body consists of a matrix and a wear-resistant body wrapped outside the matrix, wherein the wear-resistant body consists of alumina powder, Guangxi white mud, water and rho-Al 2 O 3 And a dispersant, wherein the weight percentage of each raw material is as follows: 90-95% of alumina powder, 4.5-9.5% of Guangxi white mud and the balance of water and rho-Al 2 O 3 The weight of the dispersant accounts for 0.5 to 1.1 percent of the total weight of the raw materials; the matrix consists of andalusite, alumina powder, aluminum powder, silicon carbide fiber and a dispersing agent, and the weight percentages of the raw materials are as follows: 80-90% of andalusite, 5-10% of alumina powder, 4-6% of aluminum powder and 1-4% of silicon carbide fiber, wherein the weight of the dispersant accounts for 0.5-1.1% of the total weight of the raw materials.
2. The high strength composite ceramic wear liner of claim 1, wherein: the particle sizes of the alumina powder and the Guangxi white mud are both 800 meshes.
3. The high strength composite ceramic wear liner of claim 1, wherein: the dispersant is sodium tripolyphosphate and/or sodium hexametaphosphate.
4. A method of making a high strength composite ceramic wear liner according to claim 1, comprising the steps of:
firstly, mixing andalusite, alumina powder and silicon carbide fiber serving as raw materials of a matrix, then putting the mixture into a ball mill for grinding, then equally dividing the mixture into two parts with the same quantity, adding the rest of aluminum powder into one part, putting the raw materials without the aluminum powder into a pre-prepared mould, and performing compression molding on a prefabricated part A;
mixing the raw materials of the wear-resistant body, putting the mixture into a ball mill for grinding until the granularity reaches 2000 meshes, adding the mixture into a press machine, vacuumizing and forming a prefabricated part B;
step three, the prefabricated part B is arranged outside the prefabricated part A, the raw material added with the aluminum powder is filled between the prefabricated part A and the prefabricated part B after being smelted into a semi-solid state, and after the raw material is cooled, the raw material is dried at the temperature of 500 ℃ and 600 ℃ to discharge water, and then the raw material is sintered at the temperature of 1500 ℃ and 1600 ℃ to prepare the prefabricated part.
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